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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdlib.h>
#include <limits>
#include "src/v8.h"
#include "src/accessors.h"
#include "src/allocation-site-scopes.h"
#include "src/api.h"
#include "src/arguments.h"
#include "src/bailout-reason.h"
#include "src/base/cpu.h"
#include "src/base/platform/platform.h"
#include "src/bootstrapper.h"
#include "src/codegen.h"
#include "src/compilation-cache.h"
#include "src/compiler.h"
#include "src/conversions.h"
#include "src/cpu-profiler.h"
#include "src/date.h"
#include "src/dateparser-inl.h"
#include "src/debug.h"
#include "src/deoptimizer.h"
#include "src/execution.h"
#include "src/full-codegen.h"
#include "src/global-handles.h"
#include "src/isolate-inl.h"
#include "src/json-parser.h"
#include "src/json-stringifier.h"
#include "src/jsregexp-inl.h"
#include "src/jsregexp.h"
#include "src/liveedit.h"
#include "src/misc-intrinsics.h"
#include "src/parser.h"
#include "src/prototype.h"
#include "src/runtime.h"
#include "src/runtime-profiler.h"
#include "src/scopeinfo.h"
#include "src/smart-pointers.h"
#include "src/string-search.h"
#include "src/uri.h"
#include "src/utils.h"
#include "src/v8threads.h"
#include "src/vm-state-inl.h"
#include "third_party/fdlibm/fdlibm.h"
#ifdef V8_I18N_SUPPORT
#include "src/i18n.h"
#include "unicode/brkiter.h"
#include "unicode/calendar.h"
#include "unicode/coll.h"
#include "unicode/curramt.h"
#include "unicode/datefmt.h"
#include "unicode/dcfmtsym.h"
#include "unicode/decimfmt.h"
#include "unicode/dtfmtsym.h"
#include "unicode/dtptngen.h"
#include "unicode/locid.h"
#include "unicode/numfmt.h"
#include "unicode/numsys.h"
#include "unicode/rbbi.h"
#include "unicode/smpdtfmt.h"
#include "unicode/timezone.h"
#include "unicode/uchar.h"
#include "unicode/ucol.h"
#include "unicode/ucurr.h"
#include "unicode/uloc.h"
#include "unicode/unum.h"
#include "unicode/uversion.h"
#endif
#ifndef _STLP_VENDOR_CSTD
// STLPort doesn't import fpclassify and isless into the std namespace.
using std::fpclassify;
using std::isless;
#endif
namespace v8 {
namespace internal {
#define RUNTIME_ASSERT(value) \
if (!(value)) return isolate->ThrowIllegalOperation();
#define RUNTIME_ASSERT_HANDLIFIED(value, T) \
if (!(value)) { \
isolate->ThrowIllegalOperation(); \
return MaybeHandle<T>(); \
}
// Cast the given object to a value of the specified type and store
// it in a variable with the given name. If the object is not of the
// expected type call IllegalOperation and return.
#define CONVERT_ARG_CHECKED(Type, name, index) \
RUNTIME_ASSERT(args[index]->Is##Type()); \
Type* name = Type::cast(args[index]);
#define CONVERT_ARG_HANDLE_CHECKED(Type, name, index) \
RUNTIME_ASSERT(args[index]->Is##Type()); \
Handle<Type> name = args.at<Type>(index);
#define CONVERT_NUMBER_ARG_HANDLE_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsNumber()); \
Handle<Object> name = args.at<Object>(index);
// Cast the given object to a boolean and store it in a variable with
// the given name. If the object is not a boolean call IllegalOperation
// and return.
#define CONVERT_BOOLEAN_ARG_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsBoolean()); \
bool name = args[index]->IsTrue();
// Cast the given argument to a Smi and store its value in an int variable
// with the given name. If the argument is not a Smi call IllegalOperation
// and return.
#define CONVERT_SMI_ARG_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsSmi()); \
int name = args.smi_at(index);
// Cast the given argument to a double and store it in a variable with
// the given name. If the argument is not a number (as opposed to
// the number not-a-number) call IllegalOperation and return.
#define CONVERT_DOUBLE_ARG_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsNumber()); \
double name = args.number_at(index);
// Call the specified converter on the object *comand store the result in
// a variable of the specified type with the given name. If the
// object is not a Number call IllegalOperation and return.
#define CONVERT_NUMBER_CHECKED(type, name, Type, obj) \
RUNTIME_ASSERT(obj->IsNumber()); \
type name = NumberTo##Type(obj);
// Cast the given argument to PropertyDetails and store its value in a
// variable with the given name. If the argument is not a Smi call
// IllegalOperation and return.
#define CONVERT_PROPERTY_DETAILS_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsSmi()); \
PropertyDetails name = PropertyDetails(Smi::cast(args[index]));
// Assert that the given argument has a valid value for a StrictMode
// and store it in a StrictMode variable with the given name.
#define CONVERT_STRICT_MODE_ARG_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsSmi()); \
RUNTIME_ASSERT(args.smi_at(index) == STRICT || \
args.smi_at(index) == SLOPPY); \
StrictMode name = static_cast<StrictMode>(args.smi_at(index));
// Assert that the given argument is a number within the Int32 range
// and convert it to int32_t. If the argument is not an Int32 call
// IllegalOperation and return.
#define CONVERT_INT32_ARG_CHECKED(name, index) \
RUNTIME_ASSERT(args[index]->IsNumber()); \
int32_t name = 0; \
RUNTIME_ASSERT(args[index]->ToInt32(&name));
static Handle<Map> ComputeObjectLiteralMap(
Handle<Context> context,
Handle<FixedArray> constant_properties,
bool* is_result_from_cache) {
Isolate* isolate = context->GetIsolate();
int properties_length = constant_properties->length();
int number_of_properties = properties_length / 2;
// Check that there are only internal strings and array indices among keys.
int number_of_string_keys = 0;
for (int p = 0; p != properties_length; p += 2) {
Object* key = constant_properties->get(p);
uint32_t element_index = 0;
if (key->IsInternalizedString()) {
number_of_string_keys++;
} else if (key->ToArrayIndex(&element_index)) {
// An index key does not require space in the property backing store.
number_of_properties--;
} else {
// Bail out as a non-internalized-string non-index key makes caching
// impossible.
// DCHECK to make sure that the if condition after the loop is false.
DCHECK(number_of_string_keys != number_of_properties);
break;
}
}
// If we only have internalized strings and array indices among keys then we
// can use the map cache in the native context.
const int kMaxKeys = 10;
if ((number_of_string_keys == number_of_properties) &&
(number_of_string_keys < kMaxKeys)) {
// Create the fixed array with the key.
Handle<FixedArray> keys =
isolate->factory()->NewFixedArray(number_of_string_keys);
if (number_of_string_keys > 0) {
int index = 0;
for (int p = 0; p < properties_length; p += 2) {
Object* key = constant_properties->get(p);
if (key->IsInternalizedString()) {
keys->set(index++, key);
}
}
DCHECK(index == number_of_string_keys);
}
*is_result_from_cache = true;
return isolate->factory()->ObjectLiteralMapFromCache(context, keys);
}
*is_result_from_cache = false;
return Map::Create(isolate, number_of_properties);
}
MUST_USE_RESULT static MaybeHandle<Object> CreateLiteralBoilerplate(
Isolate* isolate,
Handle<FixedArray> literals,
Handle<FixedArray> constant_properties);
MUST_USE_RESULT static MaybeHandle<Object> CreateObjectLiteralBoilerplate(
Isolate* isolate,
Handle<FixedArray> literals,
Handle<FixedArray> constant_properties,
bool should_have_fast_elements,
bool has_function_literal) {
// Get the native context from the literals array. This is the
// context in which the function was created and we use the object
// function from this context to create the object literal. We do
// not use the object function from the current native context
// because this might be the object function from another context
// which we should not have access to.
Handle<Context> context =
Handle<Context>(JSFunction::NativeContextFromLiterals(*literals));
// In case we have function literals, we want the object to be in
// slow properties mode for now. We don't go in the map cache because
// maps with constant functions can't be shared if the functions are
// not the same (which is the common case).
bool is_result_from_cache = false;
Handle<Map> map = has_function_literal
? Handle<Map>(context->object_function()->initial_map())
: ComputeObjectLiteralMap(context,
constant_properties,
&is_result_from_cache);
PretenureFlag pretenure_flag =
isolate->heap()->InNewSpace(*literals) ? NOT_TENURED : TENURED;
Handle<JSObject> boilerplate =
isolate->factory()->NewJSObjectFromMap(map, pretenure_flag);
// Normalize the elements of the boilerplate to save space if needed.
if (!should_have_fast_elements) JSObject::NormalizeElements(boilerplate);
// Add the constant properties to the boilerplate.
int length = constant_properties->length();
bool should_transform =
!is_result_from_cache && boilerplate->HasFastProperties();
bool should_normalize = should_transform || has_function_literal;
if (should_normalize) {
// TODO(verwaest): We might not want to ever normalize here.
JSObject::NormalizeProperties(
boilerplate, KEEP_INOBJECT_PROPERTIES, length / 2);
}
// TODO(verwaest): Support tracking representations in the boilerplate.
for (int index = 0; index < length; index +=2) {
Handle<Object> key(constant_properties->get(index+0), isolate);
Handle<Object> value(constant_properties->get(index+1), isolate);
if (value->IsFixedArray()) {
// The value contains the constant_properties of a
// simple object or array literal.
Handle<FixedArray> array = Handle<FixedArray>::cast(value);
ASSIGN_RETURN_ON_EXCEPTION(
isolate, value,
CreateLiteralBoilerplate(isolate, literals, array),
Object);
}
MaybeHandle<Object> maybe_result;
uint32_t element_index = 0;
if (key->IsInternalizedString()) {
if (Handle<String>::cast(key)->AsArrayIndex(&element_index)) {
// Array index as string (uint32).
if (value->IsUninitialized()) value = handle(Smi::FromInt(0), isolate);
maybe_result =
JSObject::SetOwnElement(boilerplate, element_index, value, SLOPPY);
} else {
Handle<String> name(String::cast(*key));
DCHECK(!name->AsArrayIndex(&element_index));
maybe_result = JSObject::SetOwnPropertyIgnoreAttributes(
boilerplate, name, value, NONE);
}
} else if (key->ToArrayIndex(&element_index)) {
// Array index (uint32).
if (value->IsUninitialized()) value = handle(Smi::FromInt(0), isolate);
maybe_result =
JSObject::SetOwnElement(boilerplate, element_index, value, SLOPPY);
} else {
// Non-uint32 number.
DCHECK(key->IsNumber());
double num = key->Number();
char arr[100];
Vector<char> buffer(arr, arraysize(arr));
const char* str = DoubleToCString(num, buffer);
Handle<String> name = isolate->factory()->NewStringFromAsciiChecked(str);
maybe_result = JSObject::SetOwnPropertyIgnoreAttributes(boilerplate, name,
value, NONE);
}
// If setting the property on the boilerplate throws an
// exception, the exception is converted to an empty handle in
// the handle based operations. In that case, we need to
// convert back to an exception.
RETURN_ON_EXCEPTION(isolate, maybe_result, Object);
}
// Transform to fast properties if necessary. For object literals with
// containing function literals we defer this operation until after all
// computed properties have been assigned so that we can generate
// constant function properties.
if (should_transform && !has_function_literal) {
JSObject::MigrateSlowToFast(
boilerplate, boilerplate->map()->unused_property_fields());
}
return boilerplate;
}
MUST_USE_RESULT static MaybeHandle<Object> TransitionElements(
Handle<Object> object,
ElementsKind to_kind,
Isolate* isolate) {
HandleScope scope(isolate);
if (!object->IsJSObject()) {
isolate->ThrowIllegalOperation();
return MaybeHandle<Object>();
}
ElementsKind from_kind =
Handle<JSObject>::cast(object)->map()->elements_kind();
if (Map::IsValidElementsTransition(from_kind, to_kind)) {
JSObject::TransitionElementsKind(Handle<JSObject>::cast(object), to_kind);
return object;
}
isolate->ThrowIllegalOperation();
return MaybeHandle<Object>();
}
MaybeHandle<Object> Runtime::CreateArrayLiteralBoilerplate(
Isolate* isolate,
Handle<FixedArray> literals,
Handle<FixedArray> elements) {
// Create the JSArray.
Handle<JSFunction> constructor(
JSFunction::NativeContextFromLiterals(*literals)->array_function());
PretenureFlag pretenure_flag =
isolate->heap()->InNewSpace(*literals) ? NOT_TENURED : TENURED;
Handle<JSArray> object = Handle<JSArray>::cast(
isolate->factory()->NewJSObject(constructor, pretenure_flag));
ElementsKind constant_elements_kind =
static_cast<ElementsKind>(Smi::cast(elements->get(0))->value());
Handle<FixedArrayBase> constant_elements_values(
FixedArrayBase::cast(elements->get(1)));
{ DisallowHeapAllocation no_gc;
DCHECK(IsFastElementsKind(constant_elements_kind));
Context* native_context = isolate->context()->native_context();
Object* maps_array = native_context->js_array_maps();
DCHECK(!maps_array->IsUndefined());
Object* map = FixedArray::cast(maps_array)->get(constant_elements_kind);
object->set_map(Map::cast(map));
}
Handle<FixedArrayBase> copied_elements_values;
if (IsFastDoubleElementsKind(constant_elements_kind)) {
copied_elements_values = isolate->factory()->CopyFixedDoubleArray(
Handle<FixedDoubleArray>::cast(constant_elements_values));
} else {
DCHECK(IsFastSmiOrObjectElementsKind(constant_elements_kind));
const bool is_cow =
(constant_elements_values->map() ==
isolate->heap()->fixed_cow_array_map());
if (is_cow) {
copied_elements_values = constant_elements_values;
#if DEBUG
Handle<FixedArray> fixed_array_values =
Handle<FixedArray>::cast(copied_elements_values);
for (int i = 0; i < fixed_array_values->length(); i++) {
DCHECK(!fixed_array_values->get(i)->IsFixedArray());
}
#endif
} else {
Handle<FixedArray> fixed_array_values =
Handle<FixedArray>::cast(constant_elements_values);
Handle<FixedArray> fixed_array_values_copy =
isolate->factory()->CopyFixedArray(fixed_array_values);
copied_elements_values = fixed_array_values_copy;
for (int i = 0; i < fixed_array_values->length(); i++) {
if (fixed_array_values->get(i)->IsFixedArray()) {
// The value contains the constant_properties of a
// simple object or array literal.
Handle<FixedArray> fa(FixedArray::cast(fixed_array_values->get(i)));
Handle<Object> result;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, result,
CreateLiteralBoilerplate(isolate, literals, fa),
Object);
fixed_array_values_copy->set(i, *result);
}
}
}
}
object->set_elements(*copied_elements_values);
object->set_length(Smi::FromInt(copied_elements_values->length()));
JSObject::ValidateElements(object);
return object;
}
MUST_USE_RESULT static MaybeHandle<Object> CreateLiteralBoilerplate(
Isolate* isolate,
Handle<FixedArray> literals,
Handle<FixedArray> array) {
Handle<FixedArray> elements = CompileTimeValue::GetElements(array);
const bool kHasNoFunctionLiteral = false;
switch (CompileTimeValue::GetLiteralType(array)) {
case CompileTimeValue::OBJECT_LITERAL_FAST_ELEMENTS:
return CreateObjectLiteralBoilerplate(isolate,
literals,
elements,
true,
kHasNoFunctionLiteral);
case CompileTimeValue::OBJECT_LITERAL_SLOW_ELEMENTS:
return CreateObjectLiteralBoilerplate(isolate,
literals,
elements,
false,
kHasNoFunctionLiteral);
case CompileTimeValue::ARRAY_LITERAL:
return Runtime::CreateArrayLiteralBoilerplate(
isolate, literals, elements);
default:
UNREACHABLE();
return MaybeHandle<Object>();
}
}
RUNTIME_FUNCTION(Runtime_CreateObjectLiteral) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, literals, 0);
CONVERT_SMI_ARG_CHECKED(literals_index, 1);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, constant_properties, 2);
CONVERT_SMI_ARG_CHECKED(flags, 3);
bool should_have_fast_elements = (flags & ObjectLiteral::kFastElements) != 0;
bool has_function_literal = (flags & ObjectLiteral::kHasFunction) != 0;
RUNTIME_ASSERT(literals_index >= 0 && literals_index < literals->length());
// Check if boilerplate exists. If not, create it first.
Handle<Object> literal_site(literals->get(literals_index), isolate);
Handle<AllocationSite> site;
Handle<JSObject> boilerplate;
if (*literal_site == isolate->heap()->undefined_value()) {
Handle<Object> raw_boilerplate;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, raw_boilerplate,
CreateObjectLiteralBoilerplate(
isolate,
literals,
constant_properties,
should_have_fast_elements,
has_function_literal));
boilerplate = Handle<JSObject>::cast(raw_boilerplate);
AllocationSiteCreationContext creation_context(isolate);
site = creation_context.EnterNewScope();
RETURN_FAILURE_ON_EXCEPTION(
isolate,
JSObject::DeepWalk(boilerplate, &creation_context));
creation_context.ExitScope(site, boilerplate);
// Update the functions literal and return the boilerplate.
literals->set(literals_index, *site);
} else {
site = Handle<AllocationSite>::cast(literal_site);
boilerplate = Handle<JSObject>(JSObject::cast(site->transition_info()),
isolate);
}
AllocationSiteUsageContext usage_context(isolate, site, true);
usage_context.EnterNewScope();
MaybeHandle<Object> maybe_copy = JSObject::DeepCopy(
boilerplate, &usage_context);
usage_context.ExitScope(site, boilerplate);
Handle<Object> copy;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, copy, maybe_copy);
return *copy;
}
MUST_USE_RESULT static MaybeHandle<AllocationSite> GetLiteralAllocationSite(
Isolate* isolate,
Handle<FixedArray> literals,
int literals_index,
Handle<FixedArray> elements) {
// Check if boilerplate exists. If not, create it first.
Handle<Object> literal_site(literals->get(literals_index), isolate);
Handle<AllocationSite> site;
if (*literal_site == isolate->heap()->undefined_value()) {
DCHECK(*elements != isolate->heap()->empty_fixed_array());
Handle<Object> boilerplate;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, boilerplate,
Runtime::CreateArrayLiteralBoilerplate(isolate, literals, elements),
AllocationSite);
AllocationSiteCreationContext creation_context(isolate);
site = creation_context.EnterNewScope();
if (JSObject::DeepWalk(Handle<JSObject>::cast(boilerplate),
&creation_context).is_null()) {
return Handle<AllocationSite>::null();
}
creation_context.ExitScope(site, Handle<JSObject>::cast(boilerplate));
literals->set(literals_index, *site);
} else {
site = Handle<AllocationSite>::cast(literal_site);
}
return site;
}
static MaybeHandle<JSObject> CreateArrayLiteralImpl(Isolate* isolate,
Handle<FixedArray> literals,
int literals_index,
Handle<FixedArray> elements,
int flags) {
RUNTIME_ASSERT_HANDLIFIED(literals_index >= 0 &&
literals_index < literals->length(), JSObject);
Handle<AllocationSite> site;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, site,
GetLiteralAllocationSite(isolate, literals, literals_index, elements),
JSObject);
bool enable_mementos = (flags & ArrayLiteral::kDisableMementos) == 0;
Handle<JSObject> boilerplate(JSObject::cast(site->transition_info()));
AllocationSiteUsageContext usage_context(isolate, site, enable_mementos);
usage_context.EnterNewScope();
JSObject::DeepCopyHints hints = (flags & ArrayLiteral::kShallowElements) == 0
? JSObject::kNoHints
: JSObject::kObjectIsShallow;
MaybeHandle<JSObject> copy = JSObject::DeepCopy(boilerplate, &usage_context,
hints);
usage_context.ExitScope(site, boilerplate);
return copy;
}
RUNTIME_FUNCTION(Runtime_CreateArrayLiteral) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, literals, 0);
CONVERT_SMI_ARG_CHECKED(literals_index, 1);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, elements, 2);
CONVERT_SMI_ARG_CHECKED(flags, 3);
Handle<JSObject> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
CreateArrayLiteralImpl(isolate, literals, literals_index, elements,
flags));
return *result;
}
RUNTIME_FUNCTION(Runtime_CreateArrayLiteralStubBailout) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, literals, 0);
CONVERT_SMI_ARG_CHECKED(literals_index, 1);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, elements, 2);
Handle<JSObject> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
CreateArrayLiteralImpl(isolate, literals, literals_index, elements,
ArrayLiteral::kShallowElements));
return *result;
}
RUNTIME_FUNCTION(Runtime_CreateSymbol) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, name, 0);
RUNTIME_ASSERT(name->IsString() || name->IsUndefined());
Handle<Symbol> symbol = isolate->factory()->NewSymbol();
if (name->IsString()) symbol->set_name(*name);
return *symbol;
}
RUNTIME_FUNCTION(Runtime_CreatePrivateSymbol) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, name, 0);
RUNTIME_ASSERT(name->IsString() || name->IsUndefined());
Handle<Symbol> symbol = isolate->factory()->NewPrivateSymbol();
if (name->IsString()) symbol->set_name(*name);
return *symbol;
}
RUNTIME_FUNCTION(Runtime_CreatePrivateOwnSymbol) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, name, 0);
RUNTIME_ASSERT(name->IsString() || name->IsUndefined());
Handle<Symbol> symbol = isolate->factory()->NewPrivateOwnSymbol();
if (name->IsString()) symbol->set_name(*name);
return *symbol;
}
RUNTIME_FUNCTION(Runtime_CreateGlobalPrivateOwnSymbol) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
Handle<JSObject> registry = isolate->GetSymbolRegistry();
Handle<String> part = isolate->factory()->private_intern_string();
Handle<Object> privates;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, privates, Object::GetPropertyOrElement(registry, part));
Handle<Object> symbol;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, symbol, Object::GetPropertyOrElement(privates, name));
if (!symbol->IsSymbol()) {
DCHECK(symbol->IsUndefined());
symbol = isolate->factory()->NewPrivateSymbol();
Handle<Symbol>::cast(symbol)->set_name(*name);
Handle<Symbol>::cast(symbol)->set_is_own(true);
JSObject::SetProperty(Handle<JSObject>::cast(privates), name, symbol,
STRICT).Assert();
}
return *symbol;
}
RUNTIME_FUNCTION(Runtime_NewSymbolWrapper) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Symbol, symbol, 0);
return *Object::ToObject(isolate, symbol).ToHandleChecked();
}
RUNTIME_FUNCTION(Runtime_SymbolDescription) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Symbol, symbol, 0);
return symbol->name();
}
RUNTIME_FUNCTION(Runtime_SymbolRegistry) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
return *isolate->GetSymbolRegistry();
}
RUNTIME_FUNCTION(Runtime_SymbolIsPrivate) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Symbol, symbol, 0);
return isolate->heap()->ToBoolean(symbol->is_private());
}
RUNTIME_FUNCTION(Runtime_CreateJSProxy) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, handler, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
if (!prototype->IsJSReceiver()) prototype = isolate->factory()->null_value();
return *isolate->factory()->NewJSProxy(handler, prototype);
}
RUNTIME_FUNCTION(Runtime_CreateJSFunctionProxy) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, handler, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, call_trap, 1);
RUNTIME_ASSERT(call_trap->IsJSFunction() || call_trap->IsJSFunctionProxy());
CONVERT_ARG_HANDLE_CHECKED(JSFunction, construct_trap, 2);
CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 3);
if (!prototype->IsJSReceiver()) prototype = isolate->factory()->null_value();
return *isolate->factory()->NewJSFunctionProxy(
handler, call_trap, construct_trap, prototype);
}
RUNTIME_FUNCTION(Runtime_IsJSProxy) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSProxy());
}
RUNTIME_FUNCTION(Runtime_IsJSFunctionProxy) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSFunctionProxy());
}
RUNTIME_FUNCTION(Runtime_GetHandler) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSProxy, proxy, 0);
return proxy->handler();
}
RUNTIME_FUNCTION(Runtime_GetCallTrap) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunctionProxy, proxy, 0);
return proxy->call_trap();
}
RUNTIME_FUNCTION(Runtime_GetConstructTrap) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunctionProxy, proxy, 0);
return proxy->construct_trap();
}
RUNTIME_FUNCTION(Runtime_Fix) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSProxy, proxy, 0);
JSProxy::Fix(proxy);
return isolate->heap()->undefined_value();
}
void Runtime::FreeArrayBuffer(Isolate* isolate,
JSArrayBuffer* phantom_array_buffer) {
if (phantom_array_buffer->should_be_freed()) {
DCHECK(phantom_array_buffer->is_external());
free(phantom_array_buffer->backing_store());
}
if (phantom_array_buffer->is_external()) return;
size_t allocated_length = NumberToSize(
isolate, phantom_array_buffer->byte_length());
reinterpret_cast<v8::Isolate*>(isolate)
->AdjustAmountOfExternalAllocatedMemory(
-static_cast<int64_t>(allocated_length));
CHECK(V8::ArrayBufferAllocator() != NULL);
V8::ArrayBufferAllocator()->Free(
phantom_array_buffer->backing_store(),
allocated_length);
}
void Runtime::SetupArrayBuffer(Isolate* isolate,
Handle<JSArrayBuffer> array_buffer,
bool is_external,
void* data,
size_t allocated_length) {
DCHECK(array_buffer->GetInternalFieldCount() ==
v8::ArrayBuffer::kInternalFieldCount);
for (int i = 0; i < v8::ArrayBuffer::kInternalFieldCount; i++) {
array_buffer->SetInternalField(i, Smi::FromInt(0));
}
array_buffer->set_backing_store(data);
array_buffer->set_flag(Smi::FromInt(0));
array_buffer->set_is_external(is_external);
Handle<Object> byte_length =
isolate->factory()->NewNumberFromSize(allocated_length);
CHECK(byte_length->IsSmi() || byte_length->IsHeapNumber());
array_buffer->set_byte_length(*byte_length);
array_buffer->set_weak_next(isolate->heap()->array_buffers_list());
isolate->heap()->set_array_buffers_list(*array_buffer);
array_buffer->set_weak_first_view(isolate->heap()->undefined_value());
}
bool Runtime::SetupArrayBufferAllocatingData(
Isolate* isolate,
Handle<JSArrayBuffer> array_buffer,
size_t allocated_length,
bool initialize) {
void* data;
CHECK(V8::ArrayBufferAllocator() != NULL);
if (allocated_length != 0) {
if (initialize) {
data = V8::ArrayBufferAllocator()->Allocate(allocated_length);
} else {
data =
V8::ArrayBufferAllocator()->AllocateUninitialized(allocated_length);
}
if (data == NULL) return false;
} else {
data = NULL;
}
SetupArrayBuffer(isolate, array_buffer, false, data, allocated_length);
reinterpret_cast<v8::Isolate*>(isolate)
->AdjustAmountOfExternalAllocatedMemory(allocated_length);
return true;
}
void Runtime::NeuterArrayBuffer(Handle<JSArrayBuffer> array_buffer) {
Isolate* isolate = array_buffer->GetIsolate();
for (Handle<Object> view_obj(array_buffer->weak_first_view(), isolate);
!view_obj->IsUndefined();) {
Handle<JSArrayBufferView> view(JSArrayBufferView::cast(*view_obj));
if (view->IsJSTypedArray()) {
JSTypedArray::cast(*view)->Neuter();
} else if (view->IsJSDataView()) {
JSDataView::cast(*view)->Neuter();
} else {
UNREACHABLE();
}
view_obj = handle(view->weak_next(), isolate);
}
array_buffer->Neuter();
}
RUNTIME_FUNCTION(Runtime_ArrayBufferInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArrayBuffer, holder, 0);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(byteLength, 1);
if (!holder->byte_length()->IsUndefined()) {
// ArrayBuffer is already initialized; probably a fuzz test.
return *holder;
}
size_t allocated_length = 0;
if (!TryNumberToSize(isolate, *byteLength, &allocated_length)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError("invalid_array_buffer_length",
HandleVector<Object>(NULL, 0)));
}
if (!Runtime::SetupArrayBufferAllocatingData(isolate,
holder, allocated_length)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError("invalid_array_buffer_length",
HandleVector<Object>(NULL, 0)));
}
return *holder;
}
RUNTIME_FUNCTION(Runtime_ArrayBufferGetByteLength) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSArrayBuffer, holder, 0);
return holder->byte_length();
}
RUNTIME_FUNCTION(Runtime_ArrayBufferSliceImpl) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSArrayBuffer, source, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArrayBuffer, target, 1);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(first, 2);
RUNTIME_ASSERT(!source.is_identical_to(target));
size_t start = 0;
RUNTIME_ASSERT(TryNumberToSize(isolate, *first, &start));
size_t target_length = NumberToSize(isolate, target->byte_length());
if (target_length == 0) return isolate->heap()->undefined_value();
size_t source_byte_length = NumberToSize(isolate, source->byte_length());
RUNTIME_ASSERT(start <= source_byte_length);
RUNTIME_ASSERT(source_byte_length - start >= target_length);
uint8_t* source_data = reinterpret_cast<uint8_t*>(source->backing_store());
uint8_t* target_data = reinterpret_cast<uint8_t*>(target->backing_store());
CopyBytes(target_data, source_data + start, target_length);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_ArrayBufferIsView) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, object, 0);
return isolate->heap()->ToBoolean(object->IsJSArrayBufferView());
}
RUNTIME_FUNCTION(Runtime_ArrayBufferNeuter) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSArrayBuffer, array_buffer, 0);
if (array_buffer->backing_store() == NULL) {
CHECK(Smi::FromInt(0) == array_buffer->byte_length());
return isolate->heap()->undefined_value();
}
DCHECK(!array_buffer->is_external());
void* backing_store = array_buffer->backing_store();
size_t byte_length = NumberToSize(isolate, array_buffer->byte_length());
array_buffer->set_is_external(true);
Runtime::NeuterArrayBuffer(array_buffer);
V8::ArrayBufferAllocator()->Free(backing_store, byte_length);
return isolate->heap()->undefined_value();
}
void Runtime::ArrayIdToTypeAndSize(
int arrayId,
ExternalArrayType* array_type,
ElementsKind* external_elements_kind,
ElementsKind* fixed_elements_kind,
size_t* element_size) {
switch (arrayId) {
#define ARRAY_ID_CASE(Type, type, TYPE, ctype, size) \
case ARRAY_ID_##TYPE: \
*array_type = kExternal##Type##Array; \
*external_elements_kind = EXTERNAL_##TYPE##_ELEMENTS; \
*fixed_elements_kind = TYPE##_ELEMENTS; \
*element_size = size; \
break;
TYPED_ARRAYS(ARRAY_ID_CASE)
#undef ARRAY_ID_CASE
default:
UNREACHABLE();
}
}
RUNTIME_FUNCTION(Runtime_TypedArrayInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 5);
CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, holder, 0);
CONVERT_SMI_ARG_CHECKED(arrayId, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, maybe_buffer, 2);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(byte_offset_object, 3);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(byte_length_object, 4);
RUNTIME_ASSERT(arrayId >= Runtime::ARRAY_ID_FIRST &&
arrayId <= Runtime::ARRAY_ID_LAST);
ExternalArrayType array_type = kExternalInt8Array; // Bogus initialization.
size_t element_size = 1; // Bogus initialization.
ElementsKind external_elements_kind =
EXTERNAL_INT8_ELEMENTS; // Bogus initialization.
ElementsKind fixed_elements_kind = INT8_ELEMENTS; // Bogus initialization.
Runtime::ArrayIdToTypeAndSize(arrayId,
&array_type,
&external_elements_kind,
&fixed_elements_kind,
&element_size);
RUNTIME_ASSERT(holder->map()->elements_kind() == fixed_elements_kind);
size_t byte_offset = 0;
size_t byte_length = 0;
RUNTIME_ASSERT(TryNumberToSize(isolate, *byte_offset_object, &byte_offset));
RUNTIME_ASSERT(TryNumberToSize(isolate, *byte_length_object, &byte_length));
if (maybe_buffer->IsJSArrayBuffer()) {
Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer);
size_t array_buffer_byte_length =
NumberToSize(isolate, buffer->byte_length());
RUNTIME_ASSERT(byte_offset <= array_buffer_byte_length);
RUNTIME_ASSERT(array_buffer_byte_length - byte_offset >= byte_length);
} else {
RUNTIME_ASSERT(maybe_buffer->IsNull());
}
RUNTIME_ASSERT(byte_length % element_size == 0);
size_t length = byte_length / element_size;
if (length > static_cast<unsigned>(Smi::kMaxValue)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError("invalid_typed_array_length",
HandleVector<Object>(NULL, 0)));
}
// All checks are done, now we can modify objects.
DCHECK(holder->GetInternalFieldCount() ==
v8::ArrayBufferView::kInternalFieldCount);
for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) {
holder->SetInternalField(i, Smi::FromInt(0));
}
Handle<Object> length_obj = isolate->factory()->NewNumberFromSize(length);
holder->set_length(*length_obj);
holder->set_byte_offset(*byte_offset_object);
holder->set_byte_length(*byte_length_object);
if (!maybe_buffer->IsNull()) {
Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer);
holder->set_buffer(*buffer);
holder->set_weak_next(buffer->weak_first_view());
buffer->set_weak_first_view(*holder);
Handle<ExternalArray> elements =
isolate->factory()->NewExternalArray(
static_cast<int>(length), array_type,
static_cast<uint8_t*>(buffer->backing_store()) + byte_offset);
Handle<Map> map =
JSObject::GetElementsTransitionMap(holder, external_elements_kind);
JSObject::SetMapAndElements(holder, map, elements);
DCHECK(IsExternalArrayElementsKind(holder->map()->elements_kind()));
} else {
holder->set_buffer(Smi::FromInt(0));
holder->set_weak_next(isolate->heap()->undefined_value());
Handle<FixedTypedArrayBase> elements =
isolate->factory()->NewFixedTypedArray(
static_cast<int>(length), array_type);
holder->set_elements(*elements);
}
return isolate->heap()->undefined_value();
}
// Initializes a typed array from an array-like object.
// If an array-like object happens to be a typed array of the same type,
// initializes backing store using memove.
//
// Returns true if backing store was initialized or false otherwise.
RUNTIME_FUNCTION(Runtime_TypedArrayInitializeFromArrayLike) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, holder, 0);
CONVERT_SMI_ARG_CHECKED(arrayId, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, source, 2);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(length_obj, 3);
RUNTIME_ASSERT(arrayId >= Runtime::ARRAY_ID_FIRST &&
arrayId <= Runtime::ARRAY_ID_LAST);
ExternalArrayType array_type = kExternalInt8Array; // Bogus initialization.
size_t element_size = 1; // Bogus initialization.
ElementsKind external_elements_kind =
EXTERNAL_INT8_ELEMENTS; // Bogus intialization.
ElementsKind fixed_elements_kind = INT8_ELEMENTS; // Bogus initialization.
Runtime::ArrayIdToTypeAndSize(arrayId,
&array_type,
&external_elements_kind,
&fixed_elements_kind,
&element_size);
RUNTIME_ASSERT(holder->map()->elements_kind() == fixed_elements_kind);
Handle<JSArrayBuffer> buffer = isolate->factory()->NewJSArrayBuffer();
if (source->IsJSTypedArray() &&
JSTypedArray::cast(*source)->type() == array_type) {
length_obj = Handle<Object>(JSTypedArray::cast(*source)->length(), isolate);
}
size_t length = 0;
RUNTIME_ASSERT(TryNumberToSize(isolate, *length_obj, &length));
if ((length > static_cast<unsigned>(Smi::kMaxValue)) ||
(length > (kMaxInt / element_size))) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError("invalid_typed_array_length",
HandleVector<Object>(NULL, 0)));
}
size_t byte_length = length * element_size;
DCHECK(holder->GetInternalFieldCount() ==
v8::ArrayBufferView::kInternalFieldCount);
for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) {
holder->SetInternalField(i, Smi::FromInt(0));
}
// NOTE: not initializing backing store.
// We assume that the caller of this function will initialize holder
// with the loop
// for(i = 0; i < length; i++) { holder[i] = source[i]; }
// We assume that the caller of this function is always a typed array
// constructor.
// If source is a typed array, this loop will always run to completion,
// so we are sure that the backing store will be initialized.
// Otherwise, the indexing operation might throw, so the loop will not
// run to completion and the typed array might remain partly initialized.
// However we further assume that the caller of this function is a typed array
// constructor, and the exception will propagate out of the constructor,
// therefore uninitialized memory will not be accessible by a user program.
//
// TODO(dslomov): revise this once we support subclassing.
if (!Runtime::SetupArrayBufferAllocatingData(
isolate, buffer, byte_length, false)) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError("invalid_array_buffer_length",
HandleVector<Object>(NULL, 0)));
}
holder->set_buffer(*buffer);
holder->set_byte_offset(Smi::FromInt(0));
Handle<Object> byte_length_obj(
isolate->factory()->NewNumberFromSize(byte_length));
holder->set_byte_length(*byte_length_obj);
holder->set_length(*length_obj);
holder->set_weak_next(buffer->weak_first_view());
buffer->set_weak_first_view(*holder);
Handle<ExternalArray> elements =
isolate->factory()->NewExternalArray(
static_cast<int>(length), array_type,
static_cast<uint8_t*>(buffer->backing_store()));
Handle<Map> map = JSObject::GetElementsTransitionMap(
holder, external_elements_kind);
JSObject::SetMapAndElements(holder, map, elements);
if (source->IsJSTypedArray()) {
Handle<JSTypedArray> typed_array(JSTypedArray::cast(*source));
if (typed_array->type() == holder->type()) {
uint8_t* backing_store =
static_cast<uint8_t*>(
typed_array->GetBuffer()->backing_store());
size_t source_byte_offset =
NumberToSize(isolate, typed_array->byte_offset());
memcpy(
buffer->backing_store(),
backing_store + source_byte_offset,
byte_length);
return isolate->heap()->true_value();
}
}
return isolate->heap()->false_value();
}
#define BUFFER_VIEW_GETTER(Type, getter, accessor) \
RUNTIME_FUNCTION(Runtime_##Type##Get##getter) { \
HandleScope scope(isolate); \
DCHECK(args.length() == 1); \
CONVERT_ARG_HANDLE_CHECKED(JS##Type, holder, 0); \
return holder->accessor(); \
}
BUFFER_VIEW_GETTER(ArrayBufferView, ByteLength, byte_length)
BUFFER_VIEW_GETTER(ArrayBufferView, ByteOffset, byte_offset)
BUFFER_VIEW_GETTER(TypedArray, Length, length)
BUFFER_VIEW_GETTER(DataView, Buffer, buffer)
#undef BUFFER_VIEW_GETTER
RUNTIME_FUNCTION(Runtime_TypedArrayGetBuffer) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, holder, 0);
return *holder->GetBuffer();
}
// Return codes for Runtime_TypedArraySetFastCases.
// Should be synchronized with typedarray.js natives.
enum TypedArraySetResultCodes {
// Set from typed array of the same type.
// This is processed by TypedArraySetFastCases
TYPED_ARRAY_SET_TYPED_ARRAY_SAME_TYPE = 0,
// Set from typed array of the different type, overlapping in memory.
TYPED_ARRAY_SET_TYPED_ARRAY_OVERLAPPING = 1,
// Set from typed array of the different type, non-overlapping.
TYPED_ARRAY_SET_TYPED_ARRAY_NONOVERLAPPING = 2,
// Set from non-typed array.
TYPED_ARRAY_SET_NON_TYPED_ARRAY = 3
};
RUNTIME_FUNCTION(Runtime_TypedArraySetFastCases) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
if (!args[0]->IsJSTypedArray()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewTypeError("not_typed_array", HandleVector<Object>(NULL, 0)));
}
if (!args[1]->IsJSTypedArray())
return Smi::FromInt(TYPED_ARRAY_SET_NON_TYPED_ARRAY);
CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, target_obj, 0);
CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, source_obj, 1);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(offset_obj, 2);
Handle<JSTypedArray> target(JSTypedArray::cast(*target_obj));
Handle<JSTypedArray> source(JSTypedArray::cast(*source_obj));
size_t offset = 0;
RUNTIME_ASSERT(TryNumberToSize(isolate, *offset_obj, &offset));
size_t target_length = NumberToSize(isolate, target->length());
size_t source_length = NumberToSize(isolate, source->length());
size_t target_byte_length = NumberToSize(isolate, target->byte_length());
size_t source_byte_length = NumberToSize(isolate, source->byte_length());
if (offset > target_length || offset + source_length > target_length ||
offset + source_length < offset) { // overflow
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError("typed_array_set_source_too_large",
HandleVector<Object>(NULL, 0)));
}
size_t target_offset = NumberToSize(isolate, target->byte_offset());
size_t source_offset = NumberToSize(isolate, source->byte_offset());
uint8_t* target_base =
static_cast<uint8_t*>(
target->GetBuffer()->backing_store()) + target_offset;
uint8_t* source_base =
static_cast<uint8_t*>(
source->GetBuffer()->backing_store()) + source_offset;
// Typed arrays of the same type: use memmove.
if (target->type() == source->type()) {
memmove(target_base + offset * target->element_size(),
source_base, source_byte_length);
return Smi::FromInt(TYPED_ARRAY_SET_TYPED_ARRAY_SAME_TYPE);
}
// Typed arrays of different types over the same backing store
if ((source_base <= target_base &&
source_base + source_byte_length > target_base) ||
(target_base <= source_base &&
target_base + target_byte_length > source_base)) {
// We do not support overlapping ArrayBuffers
DCHECK(
target->GetBuffer()->backing_store() ==
source->GetBuffer()->backing_store());
return Smi::FromInt(TYPED_ARRAY_SET_TYPED_ARRAY_OVERLAPPING);
} else { // Non-overlapping typed arrays
return Smi::FromInt(TYPED_ARRAY_SET_TYPED_ARRAY_NONOVERLAPPING);
}
}
RUNTIME_FUNCTION(Runtime_TypedArrayMaxSizeInHeap) {
DCHECK(args.length() == 0);
DCHECK_OBJECT_SIZE(
FLAG_typed_array_max_size_in_heap + FixedTypedArrayBase::kDataOffset);
return Smi::FromInt(FLAG_typed_array_max_size_in_heap);
}
RUNTIME_FUNCTION(Runtime_DataViewInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSDataView, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArrayBuffer, buffer, 1);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(byte_offset, 2);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(byte_length, 3);
DCHECK(holder->GetInternalFieldCount() ==
v8::ArrayBufferView::kInternalFieldCount);
for (int i = 0; i < v8::ArrayBufferView::kInternalFieldCount; i++) {
holder->SetInternalField(i, Smi::FromInt(0));
}
size_t buffer_length = 0;
size_t offset = 0;
size_t length = 0;
RUNTIME_ASSERT(
TryNumberToSize(isolate, buffer->byte_length(), &buffer_length));
RUNTIME_ASSERT(TryNumberToSize(isolate, *byte_offset, &offset));
RUNTIME_ASSERT(TryNumberToSize(isolate, *byte_length, &length));
// TODO(jkummerow): When we have a "safe numerics" helper class, use it here.
// Entire range [offset, offset + length] must be in bounds.
RUNTIME_ASSERT(offset <= buffer_length);
RUNTIME_ASSERT(offset + length <= buffer_length);
// No overflow.
RUNTIME_ASSERT(offset + length >= offset);
holder->set_buffer(*buffer);
holder->set_byte_offset(*byte_offset);
holder->set_byte_length(*byte_length);
holder->set_weak_next(buffer->weak_first_view());
buffer->set_weak_first_view(*holder);
return isolate->heap()->undefined_value();
}
inline static bool NeedToFlipBytes(bool is_little_endian) {
#ifdef V8_TARGET_LITTLE_ENDIAN
return !is_little_endian;
#else
return is_little_endian;
#endif
}
template<int n>
inline void CopyBytes(uint8_t* target, uint8_t* source) {
for (int i = 0; i < n; i++) {
*(target++) = *(source++);
}
}
template<int n>
inline void FlipBytes(uint8_t* target, uint8_t* source) {
source = source + (n-1);
for (int i = 0; i < n; i++) {
*(target++) = *(source--);
}
}
template<typename T>
inline static bool DataViewGetValue(
Isolate* isolate,
Handle<JSDataView> data_view,
Handle<Object> byte_offset_obj,
bool is_little_endian,
T* result) {
size_t byte_offset = 0;
if (!TryNumberToSize(isolate, *byte_offset_obj, &byte_offset)) {
return false;
}
Handle<JSArrayBuffer> buffer(JSArrayBuffer::cast(data_view->buffer()));
size_t data_view_byte_offset =
NumberToSize(isolate, data_view->byte_offset());
size_t data_view_byte_length =
NumberToSize(isolate, data_view->byte_length());
if (byte_offset + sizeof(T) > data_view_byte_length ||
byte_offset + sizeof(T) < byte_offset) { // overflow
return false;
}
union Value {
T data;
uint8_t bytes[sizeof(T)];
};
Value value;
size_t buffer_offset = data_view_byte_offset + byte_offset;
DCHECK(
NumberToSize(isolate, buffer->byte_length())
>= buffer_offset + sizeof(T));
uint8_t* source =
static_cast<uint8_t*>(buffer->backing_store()) + buffer_offset;
if (NeedToFlipBytes(is_little_endian)) {
FlipBytes<sizeof(T)>(value.bytes, source);
} else {
CopyBytes<sizeof(T)>(value.bytes, source);
}
*result = value.data;
return true;
}
template<typename T>
static bool DataViewSetValue(
Isolate* isolate,
Handle<JSDataView> data_view,
Handle<Object> byte_offset_obj,
bool is_little_endian,
T data) {
size_t byte_offset = 0;
if (!TryNumberToSize(isolate, *byte_offset_obj, &byte_offset)) {
return false;
}
Handle<JSArrayBuffer> buffer(JSArrayBuffer::cast(data_view->buffer()));
size_t data_view_byte_offset =
NumberToSize(isolate, data_view->byte_offset());
size_t data_view_byte_length =
NumberToSize(isolate, data_view->byte_length());
if (byte_offset + sizeof(T) > data_view_byte_length ||
byte_offset + sizeof(T) < byte_offset) { // overflow
return false;
}
union Value {
T data;
uint8_t bytes[sizeof(T)];
};
Value value;
value.data = data;
size_t buffer_offset = data_view_byte_offset + byte_offset;
DCHECK(
NumberToSize(isolate, buffer->byte_length())
>= buffer_offset + sizeof(T));
uint8_t* target =
static_cast<uint8_t*>(buffer->backing_store()) + buffer_offset;
if (NeedToFlipBytes(is_little_endian)) {
FlipBytes<sizeof(T)>(target, value.bytes);
} else {
CopyBytes<sizeof(T)>(target, value.bytes);
}
return true;
}
#define DATA_VIEW_GETTER(TypeName, Type, Converter) \
RUNTIME_FUNCTION(Runtime_DataViewGet##TypeName) { \
HandleScope scope(isolate); \
DCHECK(args.length() == 3); \
CONVERT_ARG_HANDLE_CHECKED(JSDataView, holder, 0); \
CONVERT_NUMBER_ARG_HANDLE_CHECKED(offset, 1); \
CONVERT_BOOLEAN_ARG_CHECKED(is_little_endian, 2); \
Type result; \
if (DataViewGetValue(isolate, holder, offset, is_little_endian, \
&result)) { \
return *isolate->factory()->Converter(result); \
} else { \
THROW_NEW_ERROR_RETURN_FAILURE( \
isolate, NewRangeError("invalid_data_view_accessor_offset", \
HandleVector<Object>(NULL, 0))); \
} \
}
DATA_VIEW_GETTER(Uint8, uint8_t, NewNumberFromUint)
DATA_VIEW_GETTER(Int8, int8_t, NewNumberFromInt)
DATA_VIEW_GETTER(Uint16, uint16_t, NewNumberFromUint)
DATA_VIEW_GETTER(Int16, int16_t, NewNumberFromInt)
DATA_VIEW_GETTER(Uint32, uint32_t, NewNumberFromUint)
DATA_VIEW_GETTER(Int32, int32_t, NewNumberFromInt)
DATA_VIEW_GETTER(Float32, float, NewNumber)
DATA_VIEW_GETTER(Float64, double, NewNumber)
#undef DATA_VIEW_GETTER
template <typename T>
static T DataViewConvertValue(double value);
template <>
int8_t DataViewConvertValue<int8_t>(double value) {
return static_cast<int8_t>(DoubleToInt32(value));
}
template <>
int16_t DataViewConvertValue<int16_t>(double value) {
return static_cast<int16_t>(DoubleToInt32(value));
}
template <>
int32_t DataViewConvertValue<int32_t>(double value) {
return DoubleToInt32(value);
}
template <>
uint8_t DataViewConvertValue<uint8_t>(double value) {
return static_cast<uint8_t>(DoubleToUint32(value));
}
template <>
uint16_t DataViewConvertValue<uint16_t>(double value) {
return static_cast<uint16_t>(DoubleToUint32(value));
}
template <>
uint32_t DataViewConvertValue<uint32_t>(double value) {
return DoubleToUint32(value);
}
template <>
float DataViewConvertValue<float>(double value) {
return static_cast<float>(value);
}
template <>
double DataViewConvertValue<double>(double value) {
return value;
}
#define DATA_VIEW_SETTER(TypeName, Type) \
RUNTIME_FUNCTION(Runtime_DataViewSet##TypeName) { \
HandleScope scope(isolate); \
DCHECK(args.length() == 4); \
CONVERT_ARG_HANDLE_CHECKED(JSDataView, holder, 0); \
CONVERT_NUMBER_ARG_HANDLE_CHECKED(offset, 1); \
CONVERT_NUMBER_ARG_HANDLE_CHECKED(value, 2); \
CONVERT_BOOLEAN_ARG_CHECKED(is_little_endian, 3); \
Type v = DataViewConvertValue<Type>(value->Number()); \
if (DataViewSetValue(isolate, holder, offset, is_little_endian, v)) { \
return isolate->heap()->undefined_value(); \
} else { \
THROW_NEW_ERROR_RETURN_FAILURE( \
isolate, NewRangeError("invalid_data_view_accessor_offset", \
HandleVector<Object>(NULL, 0))); \
} \
}
DATA_VIEW_SETTER(Uint8, uint8_t)
DATA_VIEW_SETTER(Int8, int8_t)
DATA_VIEW_SETTER(Uint16, uint16_t)
DATA_VIEW_SETTER(Int16, int16_t)
DATA_VIEW_SETTER(Uint32, uint32_t)
DATA_VIEW_SETTER(Int32, int32_t)
DATA_VIEW_SETTER(Float32, float)
DATA_VIEW_SETTER(Float64, double)
#undef DATA_VIEW_SETTER
RUNTIME_FUNCTION(Runtime_SetInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
Handle<OrderedHashSet> table = isolate->factory()->NewOrderedHashSet();
holder->set_table(*table);
return *holder;
}
RUNTIME_FUNCTION(Runtime_SetAdd) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()));
table = OrderedHashSet::Add(table, key);
holder->set_table(*table);
return *holder;
}
RUNTIME_FUNCTION(Runtime_SetHas) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()));
return isolate->heap()->ToBoolean(table->Contains(key));
}
RUNTIME_FUNCTION(Runtime_SetDelete) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()));
bool was_present = false;
table = OrderedHashSet::Remove(table, key, &was_present);
holder->set_table(*table);
return isolate->heap()->ToBoolean(was_present);
}
RUNTIME_FUNCTION(Runtime_SetClear) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()));
table = OrderedHashSet::Clear(table);
holder->set_table(*table);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_SetGetSize) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
Handle<OrderedHashSet> table(OrderedHashSet::cast(holder->table()));
return Smi::FromInt(table->NumberOfElements());
}
RUNTIME_FUNCTION(Runtime_SetIteratorInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSSetIterator, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(JSSet, set, 1);
CONVERT_SMI_ARG_CHECKED(kind, 2)
RUNTIME_ASSERT(kind == JSSetIterator::kKindValues ||
kind == JSSetIterator::kKindEntries);
Handle<OrderedHashSet> table(OrderedHashSet::cast(set->table()));
holder->set_table(*table);
holder->set_index(Smi::FromInt(0));
holder->set_kind(Smi::FromInt(kind));
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_SetIteratorNext) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSSetIterator, holder, 0);
CONVERT_ARG_CHECKED(JSArray, value_array, 1);
return holder->Next(value_array);
}
RUNTIME_FUNCTION(Runtime_MapInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
Handle<OrderedHashMap> table = isolate->factory()->NewOrderedHashMap();
holder->set_table(*table);
return *holder;
}
RUNTIME_FUNCTION(Runtime_MapGet) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()));
Handle<Object> lookup(table->Lookup(key), isolate);
return lookup->IsTheHole() ? isolate->heap()->undefined_value() : *lookup;
}
RUNTIME_FUNCTION(Runtime_MapHas) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()));
Handle<Object> lookup(table->Lookup(key), isolate);
return isolate->heap()->ToBoolean(!lookup->IsTheHole());
}
RUNTIME_FUNCTION(Runtime_MapDelete) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()));
bool was_present = false;
Handle<OrderedHashMap> new_table =
OrderedHashMap::Remove(table, key, &was_present);
holder->set_table(*new_table);
return isolate->heap()->ToBoolean(was_present);
}
RUNTIME_FUNCTION(Runtime_MapClear) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()));
table = OrderedHashMap::Clear(table);
holder->set_table(*table);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_MapSet) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()));
Handle<OrderedHashMap> new_table = OrderedHashMap::Put(table, key, value);
holder->set_table(*new_table);
return *holder;
}
RUNTIME_FUNCTION(Runtime_MapGetSize) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
Handle<OrderedHashMap> table(OrderedHashMap::cast(holder->table()));
return Smi::FromInt(table->NumberOfElements());
}
RUNTIME_FUNCTION(Runtime_MapIteratorInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSMapIterator, holder, 0);
CONVERT_ARG_HANDLE_CHECKED(JSMap, map, 1);
CONVERT_SMI_ARG_CHECKED(kind, 2)
RUNTIME_ASSERT(kind == JSMapIterator::kKindKeys
|| kind == JSMapIterator::kKindValues
|| kind == JSMapIterator::kKindEntries);
Handle<OrderedHashMap> table(OrderedHashMap::cast(map->table()));
holder->set_table(*table);
holder->set_index(Smi::FromInt(0));
holder->set_kind(Smi::FromInt(kind));
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetWeakMapEntries) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, holder, 0);
Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
Handle<FixedArray> entries =
isolate->factory()->NewFixedArray(table->NumberOfElements() * 2);
{
DisallowHeapAllocation no_gc;
int number_of_non_hole_elements = 0;
for (int i = 0; i < table->Capacity(); i++) {
Handle<Object> key(table->KeyAt(i), isolate);
if (table->IsKey(*key)) {
entries->set(number_of_non_hole_elements++, *key);
Object* value = table->Lookup(key);
entries->set(number_of_non_hole_elements++, value);
}
}
DCHECK_EQ(table->NumberOfElements() * 2, number_of_non_hole_elements);
}
return *isolate->factory()->NewJSArrayWithElements(entries);
}
RUNTIME_FUNCTION(Runtime_MapIteratorNext) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSMapIterator, holder, 0);
CONVERT_ARG_CHECKED(JSArray, value_array, 1);
return holder->Next(value_array);
}
static Handle<JSWeakCollection> WeakCollectionInitialize(
Isolate* isolate,
Handle<JSWeakCollection> weak_collection) {
DCHECK(weak_collection->map()->inobject_properties() == 0);
Handle<ObjectHashTable> table = ObjectHashTable::New(isolate, 0);
weak_collection->set_table(*table);
return weak_collection;
}
RUNTIME_FUNCTION(Runtime_WeakCollectionInitialize) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
return *WeakCollectionInitialize(isolate, weak_collection);
}
RUNTIME_FUNCTION(Runtime_WeakCollectionGet) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol());
Handle<ObjectHashTable> table(
ObjectHashTable::cast(weak_collection->table()));
RUNTIME_ASSERT(table->IsKey(*key));
Handle<Object> lookup(table->Lookup(key), isolate);
return lookup->IsTheHole() ? isolate->heap()->undefined_value() : *lookup;
}
RUNTIME_FUNCTION(Runtime_WeakCollectionHas) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol());
Handle<ObjectHashTable> table(
ObjectHashTable::cast(weak_collection->table()));
RUNTIME_ASSERT(table->IsKey(*key));
Handle<Object> lookup(table->Lookup(key), isolate);
return isolate->heap()->ToBoolean(!lookup->IsTheHole());
}
RUNTIME_FUNCTION(Runtime_WeakCollectionDelete) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol());
Handle<ObjectHashTable> table(ObjectHashTable::cast(
weak_collection->table()));
RUNTIME_ASSERT(table->IsKey(*key));
bool was_present = false;
Handle<ObjectHashTable> new_table =
ObjectHashTable::Remove(table, key, &was_present);
weak_collection->set_table(*new_table);
return isolate->heap()->ToBoolean(was_present);
}
RUNTIME_FUNCTION(Runtime_WeakCollectionSet) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, weak_collection, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
RUNTIME_ASSERT(key->IsJSReceiver() || key->IsSymbol());
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
Handle<ObjectHashTable> table(
ObjectHashTable::cast(weak_collection->table()));
RUNTIME_ASSERT(table->IsKey(*key));
Handle<ObjectHashTable> new_table = ObjectHashTable::Put(table, key, value);
weak_collection->set_table(*new_table);
return *weak_collection;
}
RUNTIME_FUNCTION(Runtime_GetWeakSetValues) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSWeakCollection, holder, 0);
Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
Handle<FixedArray> values =
isolate->factory()->NewFixedArray(table->NumberOfElements());
{
DisallowHeapAllocation no_gc;
int number_of_non_hole_elements = 0;
for (int i = 0; i < table->Capacity(); i++) {
Handle<Object> key(table->KeyAt(i), isolate);
if (table->IsKey(*key)) {
values->set(number_of_non_hole_elements++, *key);
}
}
DCHECK_EQ(table->NumberOfElements(), number_of_non_hole_elements);
}
return *isolate->factory()->NewJSArrayWithElements(values);
}
RUNTIME_FUNCTION(Runtime_GetPrototype) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
// We don't expect access checks to be needed on JSProxy objects.
DCHECK(!obj->IsAccessCheckNeeded() || obj->IsJSObject());
PrototypeIterator iter(isolate, obj, PrototypeIterator::START_AT_RECEIVER);
do {
if (PrototypeIterator::GetCurrent(iter)->IsAccessCheckNeeded() &&
!isolate->MayNamedAccess(
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)),
isolate->factory()->proto_string(), v8::ACCESS_GET)) {
isolate->ReportFailedAccessCheck(
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)),
v8::ACCESS_GET);
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
return isolate->heap()->undefined_value();
}
iter.AdvanceIgnoringProxies();
if (PrototypeIterator::GetCurrent(iter)->IsJSProxy()) {
return *PrototypeIterator::GetCurrent(iter);
}
} while (!iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN));
return *PrototypeIterator::GetCurrent(iter);
}
static inline Handle<Object> GetPrototypeSkipHiddenPrototypes(
Isolate* isolate, Handle<Object> receiver) {
PrototypeIterator iter(isolate, receiver);
while (!iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN)) {
if (PrototypeIterator::GetCurrent(iter)->IsJSProxy()) {
return PrototypeIterator::GetCurrent(iter);
}
iter.Advance();
}
return PrototypeIterator::GetCurrent(iter);
}
RUNTIME_FUNCTION(Runtime_InternalSetPrototype) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
DCHECK(!obj->IsAccessCheckNeeded());
DCHECK(!obj->map()->is_observed());
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, JSObject::SetPrototype(obj, prototype, false));
return *result;
}
RUNTIME_FUNCTION(Runtime_SetPrototype) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
if (obj->IsAccessCheckNeeded() &&
!isolate->MayNamedAccess(
obj, isolate->factory()->proto_string(), v8::ACCESS_SET)) {
isolate->ReportFailedAccessCheck(obj, v8::ACCESS_SET);
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
return isolate->heap()->undefined_value();
}
if (obj->map()->is_observed()) {
Handle<Object> old_value = GetPrototypeSkipHiddenPrototypes(isolate, obj);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSObject::SetPrototype(obj, prototype, true));
Handle<Object> new_value = GetPrototypeSkipHiddenPrototypes(isolate, obj);
if (!new_value->SameValue(*old_value)) {
JSObject::EnqueueChangeRecord(obj, "setPrototype",
isolate->factory()->proto_string(),
old_value);
}
return *result;
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSObject::SetPrototype(obj, prototype, true));
return *result;
}
RUNTIME_FUNCTION(Runtime_IsInPrototypeChain) {
HandleScope shs(isolate);
DCHECK(args.length() == 2);
// See ECMA-262, section 15.3.5.3, page 88 (steps 5 - 8).
CONVERT_ARG_HANDLE_CHECKED(Object, O, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, V, 1);
PrototypeIterator iter(isolate, V, PrototypeIterator::START_AT_RECEIVER);
while (true) {
iter.AdvanceIgnoringProxies();
if (iter.IsAtEnd()) return isolate->heap()->false_value();
if (iter.IsAtEnd(O)) return isolate->heap()->true_value();
}
}
// Enumerator used as indices into the array returned from GetOwnProperty
enum PropertyDescriptorIndices {
IS_ACCESSOR_INDEX,
VALUE_INDEX,
GETTER_INDEX,
SETTER_INDEX,
WRITABLE_INDEX,
ENUMERABLE_INDEX,
CONFIGURABLE_INDEX,
DESCRIPTOR_SIZE
};
MUST_USE_RESULT static MaybeHandle<Object> GetOwnProperty(Isolate* isolate,
Handle<JSObject> obj,
Handle<Name> name) {
Heap* heap = isolate->heap();
Factory* factory = isolate->factory();
PropertyAttributes attrs;
uint32_t index = 0;
Handle<Object> value;
MaybeHandle<AccessorPair> maybe_accessors;
// TODO(verwaest): Unify once indexed properties can be handled by the
// LookupIterator.
if (name->AsArrayIndex(&index)) {
// Get attributes.
Maybe<PropertyAttributes> maybe =
JSReceiver::GetOwnElementAttribute(obj, index);
if (!maybe.has_value) return MaybeHandle<Object>();
attrs = maybe.value;
if (attrs == ABSENT) return factory->undefined_value();
// Get AccessorPair if present.
maybe_accessors = JSObject::GetOwnElementAccessorPair(obj, index);
// Get value if not an AccessorPair.
if (maybe_accessors.is_null()) {
ASSIGN_RETURN_ON_EXCEPTION(isolate, value,
Runtime::GetElementOrCharAt(isolate, obj, index), Object);
}
} else {
// Get attributes.
LookupIterator it(obj, name, LookupIterator::HIDDEN);
Maybe<PropertyAttributes> maybe = JSObject::GetPropertyAttributes(&it);
if (!maybe.has_value) return MaybeHandle<Object>();
attrs = maybe.value;
if (attrs == ABSENT) return factory->undefined_value();
// Get AccessorPair if present.
if (it.state() == LookupIterator::ACCESSOR &&
it.GetAccessors()->IsAccessorPair()) {
maybe_accessors = Handle<AccessorPair>::cast(it.GetAccessors());
}
// Get value if not an AccessorPair.
if (maybe_accessors.is_null()) {
ASSIGN_RETURN_ON_EXCEPTION(
isolate, value, Object::GetProperty(&it), Object);
}
}
DCHECK(!isolate->has_pending_exception());
Handle<FixedArray> elms = factory->NewFixedArray(DESCRIPTOR_SIZE);
elms->set(ENUMERABLE_INDEX, heap->ToBoolean((attrs & DONT_ENUM) == 0));
elms->set(CONFIGURABLE_INDEX, heap->ToBoolean((attrs & DONT_DELETE) == 0));
elms->set(IS_ACCESSOR_INDEX, heap->ToBoolean(!maybe_accessors.is_null()));
Handle<AccessorPair> accessors;
if (maybe_accessors.ToHandle(&accessors)) {
Handle<Object> getter(accessors->GetComponent(ACCESSOR_GETTER), isolate);
Handle<Object> setter(accessors->GetComponent(ACCESSOR_SETTER), isolate);
elms->set(GETTER_INDEX, *getter);
elms->set(SETTER_INDEX, *setter);
} else {
elms->set(WRITABLE_INDEX, heap->ToBoolean((attrs & READ_ONLY) == 0));
elms->set(VALUE_INDEX, *value);
}
return factory->NewJSArrayWithElements(elms);
}
// Returns an array with the property description:
// if args[1] is not a property on args[0]
// returns undefined
// if args[1] is a data property on args[0]
// [false, value, Writeable, Enumerable, Configurable]
// if args[1] is an accessor on args[0]
// [true, GetFunction, SetFunction, Enumerable, Configurable]
RUNTIME_FUNCTION(Runtime_GetOwnProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, GetOwnProperty(isolate, obj, name));
return *result;
}
RUNTIME_FUNCTION(Runtime_PreventExtensions) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, JSObject::PreventExtensions(obj));
return *result;
}
RUNTIME_FUNCTION(Runtime_ToMethod) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1);
Handle<JSFunction> clone = JSFunction::CloneClosure(fun);
Handle<Symbol> home_object_symbol(isolate->heap()->home_object_symbol());
JSObject::SetOwnPropertyIgnoreAttributes(clone, home_object_symbol,
home_object, DONT_ENUM).Assert();
return *clone;
}
RUNTIME_FUNCTION(Runtime_HomeObjectSymbol) {
DCHECK(args.length() == 0);
return isolate->heap()->home_object_symbol();
}
RUNTIME_FUNCTION(Runtime_LoadFromSuper) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 2);
if (home_object->IsAccessCheckNeeded() &&
!isolate->MayNamedAccess(home_object, name, v8::ACCESS_GET)) {
isolate->ReportFailedAccessCheck(home_object, v8::ACCESS_GET);
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
}
PrototypeIterator iter(isolate, home_object);
Handle<Object> proto = PrototypeIterator::GetCurrent(iter);
if (!proto->IsJSReceiver()) return isolate->heap()->undefined_value();
LookupIterator it(receiver, name, Handle<JSReceiver>::cast(proto));
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, Object::GetProperty(&it));
return *result;
}
RUNTIME_FUNCTION(Runtime_IsExtensible) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSObject, obj, 0);
if (obj->IsJSGlobalProxy()) {
PrototypeIterator iter(isolate, obj);
if (iter.IsAtEnd()) return isolate->heap()->false_value();
DCHECK(iter.GetCurrent()->IsJSGlobalObject());
obj = JSObject::cast(iter.GetCurrent());
}
return isolate->heap()->ToBoolean(obj->map()->is_extensible());
}
RUNTIME_FUNCTION(Runtime_RegExpCompile) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSRegExp, re, 0);
CONVERT_ARG_HANDLE_CHECKED(String, pattern, 1);
CONVERT_ARG_HANDLE_CHECKED(String, flags, 2);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, RegExpImpl::Compile(re, pattern, flags));
return *result;
}
RUNTIME_FUNCTION(Runtime_CreateApiFunction) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(FunctionTemplateInfo, data, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
return *isolate->factory()->CreateApiFunction(data, prototype);
}
RUNTIME_FUNCTION(Runtime_IsTemplate) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, arg, 0);
bool result = arg->IsObjectTemplateInfo() || arg->IsFunctionTemplateInfo();
return isolate->heap()->ToBoolean(result);
}
RUNTIME_FUNCTION(Runtime_GetTemplateField) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(HeapObject, templ, 0);
CONVERT_SMI_ARG_CHECKED(index, 1);
int offset = index * kPointerSize + HeapObject::kHeaderSize;
InstanceType type = templ->map()->instance_type();
RUNTIME_ASSERT(type == FUNCTION_TEMPLATE_INFO_TYPE ||
type == OBJECT_TEMPLATE_INFO_TYPE);
RUNTIME_ASSERT(offset > 0);
if (type == FUNCTION_TEMPLATE_INFO_TYPE) {
RUNTIME_ASSERT(offset < FunctionTemplateInfo::kSize);
} else {
RUNTIME_ASSERT(offset < ObjectTemplateInfo::kSize);
}
return *HeapObject::RawField(templ, offset);
}
RUNTIME_FUNCTION(Runtime_DisableAccessChecks) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(HeapObject, object, 0);
Handle<Map> old_map(object->map());
bool needs_access_checks = old_map->is_access_check_needed();
if (needs_access_checks) {
// Copy map so it won't interfere constructor's initial map.
Handle<Map> new_map = Map::Copy(old_map);
new_map->set_is_access_check_needed(false);
JSObject::MigrateToMap(Handle<JSObject>::cast(object), new_map);
}
return isolate->heap()->ToBoolean(needs_access_checks);
}
RUNTIME_FUNCTION(Runtime_EnableAccessChecks) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
Handle<Map> old_map(object->map());
RUNTIME_ASSERT(!old_map->is_access_check_needed());
// Copy map so it won't interfere constructor's initial map.
Handle<Map> new_map = Map::Copy(old_map);
new_map->set_is_access_check_needed(true);
JSObject::MigrateToMap(object, new_map);
return isolate->heap()->undefined_value();
}
static Object* ThrowRedeclarationError(Isolate* isolate, Handle<String> name) {
HandleScope scope(isolate);
Handle<Object> args[1] = { name };
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError("var_redeclaration", HandleVector(args, 1)));
}
// May throw a RedeclarationError.
static Object* DeclareGlobals(Isolate* isolate, Handle<GlobalObject> global,
Handle<String> name, Handle<Object> value,
PropertyAttributes attr, bool is_var,
bool is_const, bool is_function) {
// Do the lookup own properties only, see ES5 erratum.
LookupIterator it(global, name, LookupIterator::HIDDEN_SKIP_INTERCEPTOR);
Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
if (!maybe.has_value) return isolate->heap()->exception();
if (it.IsFound()) {
PropertyAttributes old_attributes = maybe.value;
// The name was declared before; check for conflicting re-declarations.
if (is_const) return ThrowRedeclarationError(isolate, name);
// Skip var re-declarations.
if (is_var) return isolate->heap()->undefined_value();
DCHECK(is_function);
if ((old_attributes & DONT_DELETE) != 0) {
// Only allow reconfiguring globals to functions in user code (no
// natives, which are marked as read-only).
DCHECK((attr & READ_ONLY) == 0);
// Check whether we can reconfigure the existing property into a
// function.
PropertyDetails old_details = it.property_details();
// TODO(verwaest): CALLBACKS invalidly includes ExecutableAccessInfo,
// which are actually data properties, not accessor properties.
if (old_details.IsReadOnly() || old_details.IsDontEnum() ||
old_details.type() == CALLBACKS) {
return ThrowRedeclarationError(isolate, name);
}
// If the existing property is not configurable, keep its attributes. Do
attr = old_attributes;
}
}
// Define or redefine own property.
RETURN_FAILURE_ON_EXCEPTION(isolate, JSObject::SetOwnPropertyIgnoreAttributes(
global, name, value, attr));
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DeclareGlobals) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
Handle<GlobalObject> global(isolate->global_object());
CONVERT_ARG_HANDLE_CHECKED(Context, context, 0);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, pairs, 1);
CONVERT_SMI_ARG_CHECKED(flags, 2);
// Traverse the name/value pairs and set the properties.
int length = pairs->length();
for (int i = 0; i < length; i += 2) {
HandleScope scope(isolate);
Handle<String> name(String::cast(pairs->get(i)));
Handle<Object> initial_value(pairs->get(i + 1), isolate);
// We have to declare a global const property. To capture we only
// assign to it when evaluating the assignment for "const x =
// <expr>" the initial value is the hole.
bool is_var = initial_value->IsUndefined();
bool is_const = initial_value->IsTheHole();
bool is_function = initial_value->IsSharedFunctionInfo();
DCHECK(is_var + is_const + is_function == 1);
Handle<Object> value;
if (is_function) {
// Copy the function and update its context. Use it as value.
Handle<SharedFunctionInfo> shared =
Handle<SharedFunctionInfo>::cast(initial_value);
Handle<JSFunction> function =
isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context,
TENURED);
value = function;
} else {
value = isolate->factory()->undefined_value();
}
// Compute the property attributes. According to ECMA-262,
// the property must be non-configurable except in eval.
bool is_native = DeclareGlobalsNativeFlag::decode(flags);
bool is_eval = DeclareGlobalsEvalFlag::decode(flags);
int attr = NONE;
if (is_const) attr |= READ_ONLY;
if (is_function && is_native) attr |= READ_ONLY;
if (!is_const && !is_eval) attr |= DONT_DELETE;
Object* result = DeclareGlobals(isolate, global, name, value,
static_cast<PropertyAttributes>(attr),
is_var, is_const, is_function);
if (isolate->has_pending_exception()) return result;
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_InitializeVarGlobal) {
HandleScope scope(isolate);
// args[0] == name
// args[1] == language_mode
// args[2] == value (optional)
// Determine if we need to assign to the variable if it already
// exists (based on the number of arguments).
RUNTIME_ASSERT(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
CONVERT_STRICT_MODE_ARG_CHECKED(strict_mode, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
Handle<GlobalObject> global(isolate->context()->global_object());
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, Object::SetProperty(global, name, value, strict_mode));
return *result;
}
RUNTIME_FUNCTION(Runtime_InitializeConstGlobal) {
HandleScope handle_scope(isolate);
// All constants are declared with an initial value. The name
// of the constant is the first argument and the initial value
// is the second.
RUNTIME_ASSERT(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
Handle<GlobalObject> global = isolate->global_object();
// Lookup the property as own on the global object.
LookupIterator it(global, name, LookupIterator::HIDDEN_SKIP_INTERCEPTOR);
Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
DCHECK(maybe.has_value);
PropertyAttributes old_attributes = maybe.value;
PropertyAttributes attr =
static_cast<PropertyAttributes>(DONT_DELETE | READ_ONLY);
// Set the value if the property is either missing, or the property attributes
// allow setting the value without invoking an accessor.
if (it.IsFound()) {
// Ignore if we can't reconfigure the value.
if ((old_attributes & DONT_DELETE) != 0) {
if ((old_attributes & READ_ONLY) != 0 ||
it.state() == LookupIterator::ACCESSOR) {
return *value;
}
attr = static_cast<PropertyAttributes>(old_attributes | READ_ONLY);
}
}
RETURN_FAILURE_ON_EXCEPTION(isolate, JSObject::SetOwnPropertyIgnoreAttributes(
global, name, value, attr));
return *value;
}
RUNTIME_FUNCTION(Runtime_DeclareLookupSlot) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
// Declarations are always made in a function, native, or global context. In
// the case of eval code, the context passed is the context of the caller,
// which may be some nested context and not the declaration context.
CONVERT_ARG_HANDLE_CHECKED(Context, context_arg, 0);
Handle<Context> context(context_arg->declaration_context());
CONVERT_ARG_HANDLE_CHECKED(String, name, 1);
CONVERT_SMI_ARG_CHECKED(attr_arg, 2);
PropertyAttributes attr = static_cast<PropertyAttributes>(attr_arg);
RUNTIME_ASSERT(attr == READ_ONLY || attr == NONE);
CONVERT_ARG_HANDLE_CHECKED(Object, initial_value, 3);
// TODO(verwaest): Unify the encoding indicating "var" with DeclareGlobals.
bool is_var = *initial_value == NULL;
bool is_const = initial_value->IsTheHole();
bool is_function = initial_value->IsJSFunction();
DCHECK(is_var + is_const + is_function == 1);
int index;
PropertyAttributes attributes;
ContextLookupFlags flags = DONT_FOLLOW_CHAINS;
BindingFlags binding_flags;
Handle<Object> holder =
context->Lookup(name, flags, &index, &attributes, &binding_flags);
Handle<JSObject> object;
Handle<Object> value =
is_function ? initial_value
: Handle<Object>::cast(isolate->factory()->undefined_value());
// TODO(verwaest): This case should probably not be covered by this function,
// but by DeclareGlobals instead.
if ((attributes != ABSENT && holder->IsJSGlobalObject()) ||
(context_arg->has_extension() &&
context_arg->extension()->IsJSGlobalObject())) {
return DeclareGlobals(isolate, Handle<JSGlobalObject>::cast(holder), name,
value, attr, is_var, is_const, is_function);
}
if (attributes != ABSENT) {
// The name was declared before; check for conflicting re-declarations.
if (is_const || (attributes & READ_ONLY) != 0) {
return ThrowRedeclarationError(isolate, name);
}
// Skip var re-declarations.
if (is_var) return isolate->heap()->undefined_value();
DCHECK(is_function);
if (index >= 0) {
DCHECK(holder.is_identical_to(context));
context->set(index, *initial_value);
return isolate->heap()->undefined_value();
}
object = Handle<JSObject>::cast(holder);
} else if (context->has_extension()) {
object = handle(JSObject::cast(context->extension()));
DCHECK(object->IsJSContextExtensionObject() || object->IsJSGlobalObject());
} else {
DCHECK(context->IsFunctionContext());
object =
isolate->factory()->NewJSObject(isolate->context_extension_function());
context->set_extension(*object);
}
RETURN_FAILURE_ON_EXCEPTION(isolate, JSObject::SetOwnPropertyIgnoreAttributes(
object, name, value, attr));
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_InitializeLegacyConstLookupSlot) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
DCHECK(!value->IsTheHole());
// Initializations are always done in a function or native context.
CONVERT_ARG_HANDLE_CHECKED(Context, context_arg, 1);
Handle<Context> context(context_arg->declaration_context());
CONVERT_ARG_HANDLE_CHECKED(String, name, 2);
int index;
PropertyAttributes attributes;
ContextLookupFlags flags = DONT_FOLLOW_CHAINS;
BindingFlags binding_flags;
Handle<Object> holder =
context->Lookup(name, flags, &index, &attributes, &binding_flags);
if (index >= 0) {
DCHECK(holder->IsContext());
// Property was found in a context. Perform the assignment if the constant
// was uninitialized.
Handle<Context> context = Handle<Context>::cast(holder);
DCHECK((attributes & READ_ONLY) != 0);
if (context->get(index)->IsTheHole()) context->set(index, *value);
return *value;
}
PropertyAttributes attr =
static_cast<PropertyAttributes>(DONT_DELETE | READ_ONLY);
// Strict mode handling not needed (legacy const is disallowed in strict
// mode).
// The declared const was configurable, and may have been deleted in the
// meanwhile. If so, re-introduce the variable in the context extension.
DCHECK(context_arg->has_extension());
if (attributes == ABSENT) {
holder = handle(context_arg->extension(), isolate);
} else {
// For JSContextExtensionObjects, the initializer can be run multiple times
// if in a for loop: for (var i = 0; i < 2; i++) { const x = i; }. Only the
// first assignment should go through. For JSGlobalObjects, additionally any
// code can run in between that modifies the declared property.
DCHECK(holder->IsJSGlobalObject() || holder->IsJSContextExtensionObject());
LookupIterator it(holder, name, LookupIterator::HIDDEN_SKIP_INTERCEPTOR);
Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
if (!maybe.has_value) return isolate->heap()->exception();
PropertyAttributes old_attributes = maybe.value;
// Ignore if we can't reconfigure the value.
if ((old_attributes & DONT_DELETE) != 0) {
if ((old_attributes & READ_ONLY) != 0 ||
it.state() == LookupIterator::ACCESSOR) {
return *value;
}
attr = static_cast<PropertyAttributes>(old_attributes | READ_ONLY);
}
}
RETURN_FAILURE_ON_EXCEPTION(
isolate, JSObject::SetOwnPropertyIgnoreAttributes(
Handle<JSObject>::cast(holder), name, value, attr));
return *value;
}
RUNTIME_FUNCTION(Runtime_OptimizeObjectForAddingMultipleProperties) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_SMI_ARG_CHECKED(properties, 1);
// Conservative upper limit to prevent fuzz tests from going OOM.
RUNTIME_ASSERT(properties <= 100000);
if (object->HasFastProperties() && !object->IsJSGlobalProxy()) {
JSObject::NormalizeProperties(object, KEEP_INOBJECT_PROPERTIES, properties);
}
return *object;
}
RUNTIME_FUNCTION(Runtime_RegExpExecRT) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSRegExp, regexp, 0);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 1);
CONVERT_INT32_ARG_CHECKED(index, 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, last_match_info, 3);
// Due to the way the JS calls are constructed this must be less than the
// length of a string, i.e. it is always a Smi. We check anyway for security.
RUNTIME_ASSERT(index >= 0);
RUNTIME_ASSERT(index <= subject->length());
isolate->counters()->regexp_entry_runtime()->Increment();
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
RegExpImpl::Exec(regexp, subject, index, last_match_info));
return *result;
}
RUNTIME_FUNCTION(Runtime_RegExpConstructResult) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 3);
CONVERT_SMI_ARG_CHECKED(size, 0);
RUNTIME_ASSERT(size >= 0 && size <= FixedArray::kMaxLength);
CONVERT_ARG_HANDLE_CHECKED(Object, index, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, input, 2);
Handle<FixedArray> elements = isolate->factory()->NewFixedArray(size);
Handle<Map> regexp_map(isolate->native_context()->regexp_result_map());
Handle<JSObject> object =
isolate->factory()->NewJSObjectFromMap(regexp_map, NOT_TENURED, false);
Handle<JSArray> array = Handle<JSArray>::cast(object);
array->set_elements(*elements);
array->set_length(Smi::FromInt(size));
// Write in-object properties after the length of the array.
array->InObjectPropertyAtPut(JSRegExpResult::kIndexIndex, *index);
array->InObjectPropertyAtPut(JSRegExpResult::kInputIndex, *input);
return *array;
}
RUNTIME_FUNCTION(Runtime_RegExpInitializeObject) {
HandleScope scope(isolate);
DCHECK(args.length() == 6);
CONVERT_ARG_HANDLE_CHECKED(JSRegExp, regexp, 0);
CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
// If source is the empty string we set it to "(?:)" instead as
// suggested by ECMA-262, 5th, section 15.10.4.1.
if (source->length() == 0) source = isolate->factory()->query_colon_string();
CONVERT_ARG_HANDLE_CHECKED(Object, global, 2);
if (!global->IsTrue()) global = isolate->factory()->false_value();
CONVERT_ARG_HANDLE_CHECKED(Object, ignoreCase, 3);
if (!ignoreCase->IsTrue()) ignoreCase = isolate->factory()->false_value();
CONVERT_ARG_HANDLE_CHECKED(Object, multiline, 4);
if (!multiline->IsTrue()) multiline = isolate->factory()->false_value();
CONVERT_ARG_HANDLE_CHECKED(Object, sticky, 5);
if (!sticky->IsTrue()) sticky = isolate->factory()->false_value();
Map* map = regexp->map();
Object* constructor = map->constructor();
if (!FLAG_harmony_regexps &&
constructor->IsJSFunction() &&
JSFunction::cast(constructor)->initial_map() == map) {
// If we still have the original map, set in-object properties directly.
regexp->InObjectPropertyAtPut(JSRegExp::kSourceFieldIndex, *source);
// Both true and false are immovable immortal objects so no need for write
// barrier.
regexp->InObjectPropertyAtPut(
JSRegExp::kGlobalFieldIndex, *global, SKIP_WRITE_BARRIER);
regexp->InObjectPropertyAtPut(
JSRegExp::kIgnoreCaseFieldIndex, *ignoreCase, SKIP_WRITE_BARRIER);
regexp->InObjectPropertyAtPut(
JSRegExp::kMultilineFieldIndex, *multiline, SKIP_WRITE_BARRIER);
regexp->InObjectPropertyAtPut(
JSRegExp::kLastIndexFieldIndex, Smi::FromInt(0), SKIP_WRITE_BARRIER);
return *regexp;
}
// Map has changed, so use generic, but slower, method. We also end here if
// the --harmony-regexp flag is set, because the initial map does not have
// space for the 'sticky' flag, since it is from the snapshot, but must work
// both with and without --harmony-regexp. When sticky comes out from under
// the flag, we will be able to use the fast initial map.
PropertyAttributes final =
static_cast<PropertyAttributes>(READ_ONLY | DONT_ENUM | DONT_DELETE);
PropertyAttributes writable =
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
Handle<Object> zero(Smi::FromInt(0), isolate);
Factory* factory = isolate->factory();
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->source_string(), source, final).Check();
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->global_string(), global, final).Check();
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->ignore_case_string(), ignoreCase, final).Check();
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->multiline_string(), multiline, final).Check();
if (FLAG_harmony_regexps) {
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->sticky_string(), sticky, final).Check();
}
JSObject::SetOwnPropertyIgnoreAttributes(
regexp, factory->last_index_string(), zero, writable).Check();
return *regexp;
}
RUNTIME_FUNCTION(Runtime_FinishArrayPrototypeSetup) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, prototype, 0);
Object* length = prototype->length();
RUNTIME_ASSERT(length->IsSmi() && Smi::cast(length)->value() == 0);
RUNTIME_ASSERT(prototype->HasFastSmiOrObjectElements());
// This is necessary to enable fast checks for absence of elements
// on Array.prototype and below.
prototype->set_elements(isolate->heap()->empty_fixed_array());
return Smi::FromInt(0);
}
static void InstallBuiltin(Isolate* isolate,
Handle<JSObject> holder,
const char* name,
Builtins::Name builtin_name) {
Handle<String> key = isolate->factory()->InternalizeUtf8String(name);
Handle<Code> code(isolate->builtins()->builtin(builtin_name));
Handle<JSFunction> optimized =
isolate->factory()->NewFunctionWithoutPrototype(key, code);
optimized->shared()->DontAdaptArguments();
JSObject::AddProperty(holder, key, optimized, NONE);
}
RUNTIME_FUNCTION(Runtime_SpecialArrayFunctions) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
Handle<JSObject> holder =
isolate->factory()->NewJSObject(isolate->object_function());
InstallBuiltin(isolate, holder, "pop", Builtins::kArrayPop);
InstallBuiltin(isolate, holder, "push", Builtins::kArrayPush);
InstallBuiltin(isolate, holder, "shift", Builtins::kArrayShift);
InstallBuiltin(isolate, holder, "unshift", Builtins::kArrayUnshift);
InstallBuiltin(isolate, holder, "slice", Builtins::kArraySlice);
InstallBuiltin(isolate, holder, "splice", Builtins::kArraySplice);
InstallBuiltin(isolate, holder, "concat", Builtins::kArrayConcat);
return *holder;
}
RUNTIME_FUNCTION(Runtime_IsSloppyModeFunction) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSReceiver, callable, 0);
if (!callable->IsJSFunction()) {
HandleScope scope(isolate);
Handle<Object> delegate;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, delegate,
Execution::TryGetFunctionDelegate(
isolate, Handle<JSReceiver>(callable)));
callable = JSFunction::cast(*delegate);
}
JSFunction* function = JSFunction::cast(callable);
SharedFunctionInfo* shared = function->shared();
return isolate->heap()->ToBoolean(shared->strict_mode() == SLOPPY);
}
RUNTIME_FUNCTION(Runtime_GetDefaultReceiver) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSReceiver, callable, 0);
if (!callable->IsJSFunction()) {
HandleScope scope(isolate);
Handle<Object> delegate;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, delegate,
Execution::TryGetFunctionDelegate(
isolate, Handle<JSReceiver>(callable)));
callable = JSFunction::cast(*delegate);
}
JSFunction* function = JSFunction::cast(callable);
SharedFunctionInfo* shared = function->shared();
if (shared->native() || shared->strict_mode() == STRICT) {
return isolate->heap()->undefined_value();
}
// Returns undefined for strict or native functions, or
// the associated global receiver for "normal" functions.
return function->global_proxy();
}
RUNTIME_FUNCTION(Runtime_MaterializeRegExpLiteral) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, literals, 0);
CONVERT_SMI_ARG_CHECKED(index, 1);
CONVERT_ARG_HANDLE_CHECKED(String, pattern, 2);
CONVERT_ARG_HANDLE_CHECKED(String, flags, 3);
// Get the RegExp function from the context in the literals array.
// This is the RegExp function from the context in which the
// function was created. We do not use the RegExp function from the
// current native context because this might be the RegExp function
// from another context which we should not have access to.
Handle<JSFunction> constructor =
Handle<JSFunction>(
JSFunction::NativeContextFromLiterals(*literals)->regexp_function());
// Compute the regular expression literal.
Handle<Object> regexp;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, regexp,
RegExpImpl::CreateRegExpLiteral(constructor, pattern, flags));
literals->set(index, *regexp);
return *regexp;
}
RUNTIME_FUNCTION(Runtime_FunctionGetName) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return f->shared()->name();
}
RUNTIME_FUNCTION(Runtime_FunctionSetName) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
CONVERT_ARG_CHECKED(String, name, 1);
f->shared()->set_name(name);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionNameShouldPrintAsAnonymous) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(
f->shared()->name_should_print_as_anonymous());
}
RUNTIME_FUNCTION(Runtime_FunctionMarkNameShouldPrintAsAnonymous) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
f->shared()->set_name_should_print_as_anonymous(true);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionIsGenerator) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->is_generator());
}
RUNTIME_FUNCTION(Runtime_FunctionIsArrow) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->is_arrow());
}
RUNTIME_FUNCTION(Runtime_FunctionIsConciseMethod) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->is_concise_method());
}
RUNTIME_FUNCTION(Runtime_FunctionRemovePrototype) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
RUNTIME_ASSERT(f->RemovePrototype());
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionGetScript) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
Handle<Object> script = Handle<Object>(fun->shared()->script(), isolate);
if (!script->IsScript()) return isolate->heap()->undefined_value();
return *Script::GetWrapper(Handle<Script>::cast(script));
}
RUNTIME_FUNCTION(Runtime_FunctionGetSourceCode) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, f, 0);
Handle<SharedFunctionInfo> shared(f->shared());
return *shared->GetSourceCode();
}
RUNTIME_FUNCTION(Runtime_FunctionGetScriptSourcePosition) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
int pos = fun->shared()->start_position();
return Smi::FromInt(pos);
}
RUNTIME_FUNCTION(Runtime_FunctionGetPositionForOffset) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(Code, code, 0);
CONVERT_NUMBER_CHECKED(int, offset, Int32, args[1]);
RUNTIME_ASSERT(0 <= offset && offset < code->Size());
Address pc = code->address() + offset;
return Smi::FromInt(code->SourcePosition(pc));
}
RUNTIME_FUNCTION(Runtime_FunctionSetInstanceClassName) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_CHECKED(String, name, 1);
fun->SetInstanceClassName(name);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionSetLength) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSFunction, fun, 0);
CONVERT_SMI_ARG_CHECKED(length, 1);
RUNTIME_ASSERT((length & 0xC0000000) == 0xC0000000 ||
(length & 0xC0000000) == 0x0);
fun->shared()->set_length(length);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionSetPrototype) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
RUNTIME_ASSERT(fun->should_have_prototype());
Accessors::FunctionSetPrototype(fun, value);
return args[0]; // return TOS
}
RUNTIME_FUNCTION(Runtime_FunctionIsAPIFunction) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->shared()->IsApiFunction());
}
RUNTIME_FUNCTION(Runtime_FunctionIsBuiltin) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return isolate->heap()->ToBoolean(f->IsBuiltin());
}
RUNTIME_FUNCTION(Runtime_SetCode) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, target, 0);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, source, 1);
Handle<SharedFunctionInfo> target_shared(target->shared());
Handle<SharedFunctionInfo> source_shared(source->shared());
RUNTIME_ASSERT(!source_shared->bound());
if (!Compiler::EnsureCompiled(source, KEEP_EXCEPTION)) {
return isolate->heap()->exception();
}
// Mark both, the source and the target, as un-flushable because the
// shared unoptimized code makes them impossible to enqueue in a list.
DCHECK(target_shared->code()->gc_metadata() == NULL);
DCHECK(source_shared->code()->gc_metadata() == NULL);
target_shared->set_dont_flush(true);
source_shared->set_dont_flush(true);
// Set the code, scope info, formal parameter count, and the length
// of the target shared function info.
target_shared->ReplaceCode(source_shared->code());
target_shared->set_scope_info(source_shared->scope_info());
target_shared->set_length(source_shared->length());
target_shared->set_feedback_vector(source_shared->feedback_vector());
target_shared->set_formal_parameter_count(
source_shared->formal_parameter_count());
target_shared->set_script(source_shared->script());
target_shared->set_start_position_and_type(
source_shared->start_position_and_type());
target_shared->set_end_position(source_shared->end_position());
bool was_native = target_shared->native();
target_shared->set_compiler_hints(source_shared->compiler_hints());
target_shared->set_native(was_native);
target_shared->set_profiler_ticks(source_shared->profiler_ticks());
// Set the code of the target function.
target->ReplaceCode(source_shared->code());
DCHECK(target->next_function_link()->IsUndefined());
// Make sure we get a fresh copy of the literal vector to avoid cross
// context contamination.
Handle<Context> context(source->context());
int number_of_literals = source->NumberOfLiterals();
Handle<FixedArray> literals =
isolate->factory()->NewFixedArray(number_of_literals, TENURED);
if (number_of_literals > 0) {
literals->set(JSFunction::kLiteralNativeContextIndex,
context->native_context());
}
target->set_context(*context);
target->set_literals(*literals);
if (isolate->logger()->is_logging_code_events() ||
isolate->cpu_profiler()->is_profiling()) {
isolate->logger()->LogExistingFunction(
source_shared, Handle<Code>(source_shared->code()));
}
return *target;
}
RUNTIME_FUNCTION(Runtime_CreateJSGeneratorObject) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
Handle<JSFunction> function(frame->function());
RUNTIME_ASSERT(function->shared()->is_generator());
Handle<JSGeneratorObject> generator;
if (frame->IsConstructor()) {
generator = handle(JSGeneratorObject::cast(frame->receiver()));
} else {
generator = isolate->factory()->NewJSGeneratorObject(function);
}
generator->set_function(*function);
generator->set_context(Context::cast(frame->context()));
generator->set_receiver(frame->receiver());
generator->set_continuation(0);
generator->set_operand_stack(isolate->heap()->empty_fixed_array());
generator->set_stack_handler_index(-1);
return *generator;
}
RUNTIME_FUNCTION(Runtime_SuspendJSGeneratorObject) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator_object, 0);
JavaScriptFrameIterator stack_iterator(isolate);
JavaScriptFrame* frame = stack_iterator.frame();
RUNTIME_ASSERT(frame->function()->shared()->is_generator());
DCHECK_EQ(frame->function(), generator_object->function());
// The caller should have saved the context and continuation already.
DCHECK_EQ(generator_object->context(), Context::cast(frame->context()));
DCHECK_LT(0, generator_object->continuation());
// We expect there to be at least two values on the operand stack: the return
// value of the yield expression, and the argument to this runtime call.
// Neither of those should be saved.
int operands_count = frame->ComputeOperandsCount();
DCHECK_GE(operands_count, 2);
operands_count -= 2;
if (operands_count == 0) {
// Although it's semantically harmless to call this function with an
// operands_count of zero, it is also unnecessary.
DCHECK_EQ(generator_object->operand_stack(),
isolate->heap()->empty_fixed_array());
DCHECK_EQ(generator_object->stack_handler_index(), -1);
// If there are no operands on the stack, there shouldn't be a handler
// active either.
DCHECK(!frame->HasHandler());
} else {
int stack_handler_index = -1;
Handle<FixedArray> operand_stack =
isolate->factory()->NewFixedArray(operands_count);
frame->SaveOperandStack(*operand_stack, &stack_handler_index);
generator_object->set_operand_stack(*operand_stack);
generator_object->set_stack_handler_index(stack_handler_index);
}
return isolate->heap()->undefined_value();
}
// Note that this function is the slow path for resuming generators. It is only
// called if the suspended activation had operands on the stack, stack handlers
// needing rewinding, or if the resume should throw an exception. The fast path
// is handled directly in FullCodeGenerator::EmitGeneratorResume(), which is
// inlined into GeneratorNext and GeneratorThrow. EmitGeneratorResumeResume is
// called in any case, as it needs to reconstruct the stack frame and make space
// for arguments and operands.
RUNTIME_FUNCTION(Runtime_ResumeJSGeneratorObject) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_CHECKED(JSGeneratorObject, generator_object, 0);
CONVERT_ARG_CHECKED(Object, value, 1);
CONVERT_SMI_ARG_CHECKED(resume_mode_int, 2);
JavaScriptFrameIterator stack_iterator(isolate);
JavaScriptFrame* frame = stack_iterator.frame();
DCHECK_EQ(frame->function(), generator_object->function());
DCHECK(frame->function()->is_compiled());
STATIC_ASSERT(JSGeneratorObject::kGeneratorExecuting < 0);
STATIC_ASSERT(JSGeneratorObject::kGeneratorClosed == 0);
Address pc = generator_object->function()->code()->instruction_start();
int offset = generator_object->continuation();
DCHECK(offset > 0);
frame->set_pc(pc + offset);
if (FLAG_enable_ool_constant_pool) {
frame->set_constant_pool(
generator_object->function()->code()->constant_pool());
}
generator_object->set_continuation(JSGeneratorObject::kGeneratorExecuting);
FixedArray* operand_stack = generator_object->operand_stack();
int operands_count = operand_stack->length();
if (operands_count != 0) {
frame->RestoreOperandStack(operand_stack,
generator_object->stack_handler_index());
generator_object->set_operand_stack(isolate->heap()->empty_fixed_array());
generator_object->set_stack_handler_index(-1);
}
JSGeneratorObject::ResumeMode resume_mode =
static_cast<JSGeneratorObject::ResumeMode>(resume_mode_int);
switch (resume_mode) {
case JSGeneratorObject::NEXT:
return value;
case JSGeneratorObject::THROW:
return isolate->Throw(value);
}
UNREACHABLE();
return isolate->ThrowIllegalOperation();
}
RUNTIME_FUNCTION(Runtime_ThrowGeneratorStateError) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
int continuation = generator->continuation();
const char* message = continuation == JSGeneratorObject::kGeneratorClosed ?
"generator_finished" : "generator_running";
Vector< Handle<Object> > argv = HandleVector<Object>(NULL, 0);
THROW_NEW_ERROR_RETURN_FAILURE(isolate, NewError(message, argv));
}
RUNTIME_FUNCTION(Runtime_ObjectFreeze) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
// %ObjectFreeze is a fast path and these cases are handled elsewhere.
RUNTIME_ASSERT(!object->HasSloppyArgumentsElements() &&
!object->map()->is_observed() &&
!object->IsJSProxy());
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, JSObject::Freeze(object));
return *result;
}
RUNTIME_FUNCTION(Runtime_StringCharCodeAtRT) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
CONVERT_NUMBER_CHECKED(uint32_t, i, Uint32, args[1]);
// Flatten the string. If someone wants to get a char at an index
// in a cons string, it is likely that more indices will be
// accessed.
subject = String::Flatten(subject);
if (i >= static_cast<uint32_t>(subject->length())) {
return isolate->heap()->nan_value();
}
return Smi::FromInt(subject->Get(i));
}
RUNTIME_FUNCTION(Runtime_CharFromCode) {
HandleScope handlescope(isolate);
DCHECK(args.length() == 1);
if (args[0]->IsNumber()) {
CONVERT_NUMBER_CHECKED(uint32_t, code, Uint32, args[0]);
code &= 0xffff;
return *isolate->factory()->LookupSingleCharacterStringFromCode(code);
}
return isolate->heap()->empty_string();
}
class FixedArrayBuilder {
public:
explicit FixedArrayBuilder(Isolate* isolate, int initial_capacity)
: array_(isolate->factory()->NewFixedArrayWithHoles(initial_capacity)),
length_(0),
has_non_smi_elements_(false) {
// Require a non-zero initial size. Ensures that doubling the size to
// extend the array will work.
DCHECK(initial_capacity > 0);
}
explicit FixedArrayBuilder(Handle<FixedArray> backing_store)
: array_(backing_store),
length_(0),
has_non_smi_elements_(false) {
// Require a non-zero initial size. Ensures that doubling the size to
// extend the array will work.
DCHECK(backing_store->length() > 0);
}
bool HasCapacity(int elements) {
int length = array_->length();
int required_length = length_ + elements;
return (length >= required_length);
}
void EnsureCapacity(int elements) {
int length = array_->length();
int required_length = length_ + elements;
if (length < required_length) {
int new_length = length;
do {
new_length *= 2;
} while (new_length < required_length);
Handle<FixedArray> extended_array =
array_->GetIsolate()->factory()->NewFixedArrayWithHoles(new_length);
array_->CopyTo(0, *extended_array, 0, length_);
array_ = extended_array;
}
}
void Add(Object* value) {
DCHECK(!value->IsSmi());
DCHECK(length_ < capacity());
array_->set(length_, value);
length_++;
has_non_smi_elements_ = true;
}
void Add(Smi* value) {
DCHECK(value->IsSmi());
DCHECK(length_ < capacity());
array_->set(length_, value);
length_++;
}
Handle<FixedArray> array() {
return array_;
}
int length() {
return length_;
}
int capacity() {
return array_->length();
}
Handle<JSArray> ToJSArray(Handle<JSArray> target_array) {
JSArray::SetContent(target_array, array_);
target_array->set_length(Smi::FromInt(length_));
return target_array;
}
private:
Handle<FixedArray> array_;
int length_;
bool has_non_smi_elements_;
};
// Forward declarations.
const int kStringBuilderConcatHelperLengthBits = 11;
const int kStringBuilderConcatHelperPositionBits = 19;
template <typename schar>
static inline void StringBuilderConcatHelper(String*,
schar*,
FixedArray*,
int);
typedef BitField<int, 0, kStringBuilderConcatHelperLengthBits>
StringBuilderSubstringLength;
typedef BitField<int,
kStringBuilderConcatHelperLengthBits,
kStringBuilderConcatHelperPositionBits>
StringBuilderSubstringPosition;
class ReplacementStringBuilder {
public:
ReplacementStringBuilder(Heap* heap, Handle<String> subject,
int estimated_part_count)
: heap_(heap),
array_builder_(heap->isolate(), estimated_part_count),
subject_(subject),
character_count_(0),
is_one_byte_(subject->IsOneByteRepresentation()) {
// Require a non-zero initial size. Ensures that doubling the size to
// extend the array will work.
DCHECK(estimated_part_count > 0);
}
static inline void AddSubjectSlice(FixedArrayBuilder* builder,
int from,
int to) {
DCHECK(from >= 0);
int length = to - from;
DCHECK(length > 0);
if (StringBuilderSubstringLength::is_valid(length) &&
StringBuilderSubstringPosition::is_valid(from)) {
int encoded_slice = StringBuilderSubstringLength::encode(length) |
StringBuilderSubstringPosition::encode(from);
builder->Add(Smi::FromInt(encoded_slice));
} else {
// Otherwise encode as two smis.
builder->Add(Smi::FromInt(-length));
builder->Add(Smi::FromInt(from));
}
}
void EnsureCapacity(int elements) {
array_builder_.EnsureCapacity(elements);
}
void AddSubjectSlice(int from, int to) {
AddSubjectSlice(&array_builder_, from, to);
IncrementCharacterCount(to - from);
}
void AddString(Handle<String> string) {
int length = string->length();
DCHECK(length > 0);
AddElement(*string);
if (!string->IsOneByteRepresentation()) {
is_one_byte_ = false;
}
IncrementCharacterCount(length);
}
MaybeHandle<String> ToString() {
Isolate* isolate = heap_->isolate();
if (array_builder_.length() == 0) {
return isolate->factory()->empty_string();
}
Handle<String> joined_string;
if (is_one_byte_) {
Handle<SeqOneByteString> seq;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, seq,
isolate->factory()->NewRawOneByteString(character_count_),
String);
DisallowHeapAllocation no_gc;
uint8_t* char_buffer = seq->GetChars();
StringBuilderConcatHelper(*subject_,
char_buffer,
*array_builder_.array(),
array_builder_.length());
joined_string = Handle<String>::cast(seq);
} else {
// Two-byte.
Handle<SeqTwoByteString> seq;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, seq,
isolate->factory()->NewRawTwoByteString(character_count_),
String);
DisallowHeapAllocation no_gc;
uc16* char_buffer = seq->GetChars();
StringBuilderConcatHelper(*subject_,
char_buffer,
*array_builder_.array(),
array_builder_.length());
joined_string = Handle<String>::cast(seq);
}
return joined_string;
}
void IncrementCharacterCount(int by) {
if (character_count_ > String::kMaxLength - by) {
STATIC_ASSERT(String::kMaxLength < kMaxInt);
character_count_ = kMaxInt;
} else {
character_count_ += by;
}
}
private:
void AddElement(Object* element) {
DCHECK(element->IsSmi() || element->IsString());
DCHECK(array_builder_.capacity() > array_builder_.length());
array_builder_.Add(element);
}
Heap* heap_;
FixedArrayBuilder array_builder_;
Handle<String> subject_;
int character_count_;
bool is_one_byte_;
};
class CompiledReplacement {
public:
explicit CompiledReplacement(Zone* zone)
: parts_(1, zone), replacement_substrings_(0, zone), zone_(zone) {}
// Return whether the replacement is simple.
bool Compile(Handle<String> replacement,
int capture_count,
int subject_length);
// Use Apply only if Compile returned false.
void Apply(ReplacementStringBuilder* builder,
int match_from,
int match_to,
int32_t* match);
// Number of distinct parts of the replacement pattern.
int parts() {
return parts_.length();
}
Zone* zone() const { return zone_; }
private:
enum PartType {
SUBJECT_PREFIX = 1,
SUBJECT_SUFFIX,
SUBJECT_CAPTURE,
REPLACEMENT_SUBSTRING,
REPLACEMENT_STRING,
NUMBER_OF_PART_TYPES
};
struct ReplacementPart {
static inline ReplacementPart SubjectMatch() {
return ReplacementPart(SUBJECT_CAPTURE, 0);
}
static inline ReplacementPart SubjectCapture(int capture_index) {
return ReplacementPart(SUBJECT_CAPTURE, capture_index);
}
static inline ReplacementPart SubjectPrefix() {
return ReplacementPart(SUBJECT_PREFIX, 0);
}
static inline ReplacementPart SubjectSuffix(int subject_length) {
return ReplacementPart(SUBJECT_SUFFIX, subject_length);
}
static inline ReplacementPart ReplacementString() {
return ReplacementPart(REPLACEMENT_STRING, 0);
}
static inline ReplacementPart ReplacementSubString(int from, int to) {
DCHECK(from >= 0);
DCHECK(to > from);
return ReplacementPart(-from, to);
}
// If tag <= 0 then it is the negation of a start index of a substring of
// the replacement pattern, otherwise it's a value from PartType.
ReplacementPart(int tag, int data)
: tag(tag), data(data) {
// Must be non-positive or a PartType value.
DCHECK(tag < NUMBER_OF_PART_TYPES);
}
// Either a value of PartType or a non-positive number that is
// the negation of an index into the replacement string.
int tag;
// The data value's interpretation depends on the value of tag:
// tag == SUBJECT_PREFIX ||
// tag == SUBJECT_SUFFIX: data is unused.
// tag == SUBJECT_CAPTURE: data is the number of the capture.
// tag == REPLACEMENT_SUBSTRING ||
// tag == REPLACEMENT_STRING: data is index into array of substrings
// of the replacement string.
// tag <= 0: Temporary representation of the substring of the replacement
// string ranging over -tag .. data.
// Is replaced by REPLACEMENT_{SUB,}STRING when we create the
// substring objects.
int data;
};
template<typename Char>
bool ParseReplacementPattern(ZoneList<ReplacementPart>* parts,
Vector<Char> characters,
int capture_count,
int subject_length,
Zone* zone) {
int length = characters.length();
int last = 0;
for (int i = 0; i < length; i++) {
Char c = characters[i];
if (c == '$') {
int next_index = i + 1;
if (next_index == length) { // No next character!
break;
}
Char c2 = characters[next_index];
switch (c2) {
case '$':
if (i > last) {
// There is a substring before. Include the first "$".
parts->Add(ReplacementPart::ReplacementSubString(last, next_index),
zone);
last = next_index + 1; // Continue after the second "$".
} else {
// Let the next substring start with the second "$".
last = next_index;
}
i = next_index;
break;
case '`':
if (i > last) {
parts->Add(ReplacementPart::ReplacementSubString(last, i), zone);
}
parts->Add(ReplacementPart::SubjectPrefix(), zone);
i = next_index;
last = i + 1;
break;
case '\'':
if (i > last) {
parts->Add(ReplacementPart::ReplacementSubString(last, i), zone);
}
parts->Add(ReplacementPart::SubjectSuffix(subject_length), zone);
i = next_index;
last = i + 1;
break;
case '&':
if (i > last) {
parts->Add(ReplacementPart::ReplacementSubString(last, i), zone);
}
parts->Add(ReplacementPart::SubjectMatch(), zone);
i = next_index;
last = i + 1;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': {
int capture_ref = c2 - '0';
if (capture_ref > capture_count) {
i = next_index;
continue;
}
int second_digit_index = next_index + 1;
if (second_digit_index < length) {
// Peek ahead to see if we have two digits.
Char c3 = characters[second_digit_index];
if ('0' <= c3 && c3 <= '9') { // Double digits.
int double_digit_ref = capture_ref * 10 + c3 - '0';
if (double_digit_ref <= capture_count) {
next_index = second_digit_index;
capture_ref = double_digit_ref;
}
}
}
if (capture_ref > 0) {
if (i > last) {
parts->Add(ReplacementPart::ReplacementSubString(last, i), zone);
}
DCHECK(capture_ref <= capture_count);
parts->Add(ReplacementPart::SubjectCapture(capture_ref), zone);
last = next_index + 1;
}
i = next_index;
break;
}
default:
i = next_index;
break;
}
}
}
if (length > last) {
if (last == 0) {
// Replacement is simple. Do not use Apply to do the replacement.
return true;
} else {
parts->Add(ReplacementPart::ReplacementSubString(last, length), zone);
}
}
return false;
}
ZoneList<ReplacementPart> parts_;
ZoneList<Handle<String> > replacement_substrings_;
Zone* zone_;
};
bool CompiledReplacement::Compile(Handle<String> replacement,
int capture_count,
int subject_length) {
{
DisallowHeapAllocation no_gc;
String::FlatContent content = replacement->GetFlatContent();
DCHECK(content.IsFlat());
bool simple = false;
if (content.IsOneByte()) {
simple = ParseReplacementPattern(&parts_,
content.ToOneByteVector(),
capture_count,
subject_length,
zone());
} else {
DCHECK(content.IsTwoByte());
simple = ParseReplacementPattern(&parts_,
content.ToUC16Vector(),
capture_count,
subject_length,
zone());
}
if (simple) return true;
}
Isolate* isolate = replacement->GetIsolate();
// Find substrings of replacement string and create them as String objects.
int substring_index = 0;
for (int i = 0, n = parts_.length(); i < n; i++) {
int tag = parts_[i].tag;
if (tag <= 0) { // A replacement string slice.
int from = -tag;
int to = parts_[i].data;
replacement_substrings_.Add(
isolate->factory()->NewSubString(replacement, from, to), zone());
parts_[i].tag = REPLACEMENT_SUBSTRING;
parts_[i].data = substring_index;
substring_index++;
} else if (tag == REPLACEMENT_STRING) {
replacement_substrings_.Add(replacement, zone());
parts_[i].data = substring_index;
substring_index++;
}
}
return false;
}
void CompiledReplacement::Apply(ReplacementStringBuilder* builder,
int match_from,
int match_to,
int32_t* match) {
DCHECK_LT(0, parts_.length());
for (int i = 0, n = parts_.length(); i < n; i++) {
ReplacementPart part = parts_[i];
switch (part.tag) {
case SUBJECT_PREFIX:
if (match_from > 0) builder->AddSubjectSlice(0, match_from);
break;
case SUBJECT_SUFFIX: {
int subject_length = part.data;
if (match_to < subject_length) {
builder->AddSubjectSlice(match_to, subject_length);
}
break;
}
case SUBJECT_CAPTURE: {
int capture = part.data;
int from = match[capture * 2];
int to = match[capture * 2 + 1];
if (from >= 0 && to > from) {
builder->AddSubjectSlice(from, to);
}
break;
}
case REPLACEMENT_SUBSTRING:
case REPLACEMENT_STRING:
builder->AddString(replacement_substrings_[part.data]);
break;
default:
UNREACHABLE();
}
}
}
void FindOneByteStringIndices(Vector<const uint8_t> subject, char pattern,
ZoneList<int>* indices, unsigned int limit,
Zone* zone) {
DCHECK(limit > 0);
// Collect indices of pattern in subject using memchr.
// Stop after finding at most limit values.
const uint8_t* subject_start = subject.start();
const uint8_t* subject_end = subject_start + subject.length();
const uint8_t* pos = subject_start;
while (limit > 0) {
pos = reinterpret_cast<const uint8_t*>(
memchr(pos, pattern, subject_end - pos));
if (pos == NULL) return;
indices->Add(static_cast<int>(pos - subject_start), zone);
pos++;
limit--;
}
}
void FindTwoByteStringIndices(const Vector<const uc16> subject,
uc16 pattern,
ZoneList<int>* indices,
unsigned int limit,
Zone* zone) {
DCHECK(limit > 0);
const uc16* subject_start = subject.start();
const uc16* subject_end = subject_start + subject.length();
for (const uc16* pos = subject_start; pos < subject_end && limit > 0; pos++) {
if (*pos == pattern) {
indices->Add(static_cast<int>(pos - subject_start), zone);
limit--;
}
}
}
template <typename SubjectChar, typename PatternChar>
void FindStringIndices(Isolate* isolate,
Vector<const SubjectChar> subject,
Vector<const PatternChar> pattern,
ZoneList<int>* indices,
unsigned int limit,
Zone* zone) {
DCHECK(limit > 0);
// Collect indices of pattern in subject.
// Stop after finding at most limit values.
int pattern_length = pattern.length();
int index = 0;
StringSearch<PatternChar, SubjectChar> search(isolate, pattern);
while (limit > 0) {
index = search.Search(subject, index);
if (index < 0) return;
indices->Add(index, zone);
index += pattern_length;
limit--;
}
}
void FindStringIndicesDispatch(Isolate* isolate,
String* subject,
String* pattern,
ZoneList<int>* indices,
unsigned int limit,
Zone* zone) {
{
DisallowHeapAllocation no_gc;
String::FlatContent subject_content = subject->GetFlatContent();
String::FlatContent pattern_content = pattern->GetFlatContent();
DCHECK(subject_content.IsFlat());
DCHECK(pattern_content.IsFlat());
if (subject_content.IsOneByte()) {
Vector<const uint8_t> subject_vector = subject_content.ToOneByteVector();
if (pattern_content.IsOneByte()) {
Vector<const uint8_t> pattern_vector =
pattern_content.ToOneByteVector();
if (pattern_vector.length() == 1) {
FindOneByteStringIndices(subject_vector, pattern_vector[0], indices,
limit, zone);
} else {
FindStringIndices(isolate,
subject_vector,
pattern_vector,
indices,
limit,
zone);
}
} else {
FindStringIndices(isolate,
subject_vector,
pattern_content.ToUC16Vector(),
indices,
limit,
zone);
}
} else {
Vector<const uc16> subject_vector = subject_content.ToUC16Vector();
if (pattern_content.IsOneByte()) {
Vector<const uint8_t> pattern_vector =
pattern_content.ToOneByteVector();
if (pattern_vector.length() == 1) {
FindTwoByteStringIndices(subject_vector,
pattern_vector[0],
indices,
limit,
zone);
} else {
FindStringIndices(isolate,
subject_vector,
pattern_vector,
indices,
limit,
zone);
}
} else {
Vector<const uc16> pattern_vector = pattern_content.ToUC16Vector();
if (pattern_vector.length() == 1) {
FindTwoByteStringIndices(subject_vector,
pattern_vector[0],
indices,
limit,
zone);
} else {
FindStringIndices(isolate,
subject_vector,
pattern_vector,
indices,
limit,
zone);
}
}
}
}
}
template<typename ResultSeqString>
MUST_USE_RESULT static Object* StringReplaceGlobalAtomRegExpWithString(
Isolate* isolate,
Handle<String> subject,
Handle<JSRegExp> pattern_regexp,
Handle<String> replacement,
Handle<JSArray> last_match_info) {
DCHECK(subject->IsFlat());
DCHECK(replacement->IsFlat());
ZoneScope zone_scope(isolate->runtime_zone());
ZoneList<int> indices(8, zone_scope.zone());
DCHECK_EQ(JSRegExp::ATOM, pattern_regexp->TypeTag());
String* pattern =
String::cast(pattern_regexp->DataAt(JSRegExp::kAtomPatternIndex));
int subject_len = subject->length();
int pattern_len = pattern->length();
int replacement_len = replacement->length();
FindStringIndicesDispatch(
isolate, *subject, pattern, &indices, 0xffffffff, zone_scope.zone());
int matches = indices.length();
if (matches == 0) return *subject;
// Detect integer overflow.
int64_t result_len_64 =
(static_cast<int64_t>(replacement_len) -
static_cast<int64_t>(pattern_len)) *
static_cast<int64_t>(matches) +
static_cast<int64_t>(subject_len);
int result_len;
if (result_len_64 > static_cast<int64_t>(String::kMaxLength)) {
STATIC_ASSERT(String::kMaxLength < kMaxInt);
result_len = kMaxInt; // Provoke exception.
} else {
result_len = static_cast<int>(result_len_64);
}
int subject_pos = 0;
int result_pos = 0;
MaybeHandle<SeqString> maybe_res;
if (ResultSeqString::kHasOneByteEncoding) {
maybe_res = isolate->factory()->NewRawOneByteString(result_len);
} else {
maybe_res = isolate->factory()->NewRawTwoByteString(result_len);
}
Handle<SeqString> untyped_res;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, untyped_res, maybe_res);
Handle<ResultSeqString> result = Handle<ResultSeqString>::cast(untyped_res);
for (int i = 0; i < matches; i++) {
// Copy non-matched subject content.
if (subject_pos < indices.at(i)) {
String::WriteToFlat(*subject,
result->GetChars() + result_pos,
subject_pos,
indices.at(i));
result_pos += indices.at(i) - subject_pos;
}
// Replace match.
if (replacement_len > 0) {
String::WriteToFlat(*replacement,
result->GetChars() + result_pos,
0,
replacement_len);
result_pos += replacement_len;
}
subject_pos = indices.at(i) + pattern_len;
}
// Add remaining subject content at the end.
if (subject_pos < subject_len) {
String::WriteToFlat(*subject,
result->GetChars() + result_pos,
subject_pos,
subject_len);
}
int32_t match_indices[] = { indices.at(matches - 1),
indices.at(matches - 1) + pattern_len };
RegExpImpl::SetLastMatchInfo(last_match_info, subject, 0, match_indices);
return *result;
}
MUST_USE_RESULT static Object* StringReplaceGlobalRegExpWithString(
Isolate* isolate,
Handle<String> subject,
Handle<JSRegExp> regexp,
Handle<String> replacement,
Handle<JSArray> last_match_info) {
DCHECK(subject->IsFlat());
DCHECK(replacement->IsFlat());
int capture_count = regexp->CaptureCount();
int subject_length = subject->length();
// CompiledReplacement uses zone allocation.
ZoneScope zone_scope(isolate->runtime_zone());
CompiledReplacement compiled_replacement(zone_scope.zone());
bool simple_replace = compiled_replacement.Compile(replacement,
capture_count,
subject_length);
// Shortcut for simple non-regexp global replacements
if (regexp->TypeTag() == JSRegExp::ATOM && simple_replace) {
if (subject->HasOnlyOneByteChars() &&
replacement->HasOnlyOneByteChars()) {
return StringReplaceGlobalAtomRegExpWithString<SeqOneByteString>(
isolate, subject, regexp, replacement, last_match_info);
} else {
return StringReplaceGlobalAtomRegExpWithString<SeqTwoByteString>(
isolate, subject, regexp, replacement, last_match_info);
}
}
RegExpImpl::GlobalCache global_cache(regexp, subject, true, isolate);
if (global_cache.HasException()) return isolate->heap()->exception();
int32_t* current_match = global_cache.FetchNext();
if (current_match == NULL) {
if (global_cache.HasException()) return isolate->heap()->exception();
return *subject;
}
// Guessing the number of parts that the final result string is built
// from. Global regexps can match any number of times, so we guess
// conservatively.
int expected_parts = (compiled_replacement.parts() + 1) * 4 + 1;
ReplacementStringBuilder builder(isolate->heap(),
subject,
expected_parts);
// Number of parts added by compiled replacement plus preceeding
// string and possibly suffix after last match. It is possible for
// all components to use two elements when encoded as two smis.
const int parts_added_per_loop = 2 * (compiled_replacement.parts() + 2);
int prev = 0;
do {
builder.EnsureCapacity(parts_added_per_loop);
int start = current_match[0];
int end = current_match[1];
if (prev < start) {
builder.AddSubjectSlice(prev, start);
}
if (simple_replace) {
builder.AddString(replacement);
} else {
compiled_replacement.Apply(&builder,
start,
end,
current_match);
}
prev = end;
current_match = global_cache.FetchNext();
} while (current_match != NULL);
if (global_cache.HasException()) return isolate->heap()->exception();
if (prev < subject_length) {
builder.EnsureCapacity(2);
builder.AddSubjectSlice(prev, subject_length);
}
RegExpImpl::SetLastMatchInfo(last_match_info,
subject,
capture_count,
global_cache.LastSuccessfulMatch());
Handle<String> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, builder.ToString());
return *result;
}
template <typename ResultSeqString>
MUST_USE_RESULT static Object* StringReplaceGlobalRegExpWithEmptyString(
Isolate* isolate,
Handle<String> subject,
Handle<JSRegExp> regexp,
Handle<JSArray> last_match_info) {
DCHECK(subject->IsFlat());
// Shortcut for simple non-regexp global replacements
if (regexp->TypeTag() == JSRegExp::ATOM) {
Handle<String> empty_string = isolate->factory()->empty_string();
if (subject->IsOneByteRepresentation()) {
return StringReplaceGlobalAtomRegExpWithString<SeqOneByteString>(
isolate, subject, regexp, empty_string, last_match_info);
} else {
return StringReplaceGlobalAtomRegExpWithString<SeqTwoByteString>(
isolate, subject, regexp, empty_string, last_match_info);
}
}
RegExpImpl::GlobalCache global_cache(regexp, subject, true, isolate);
if (global_cache.HasException()) return isolate->heap()->exception();
int32_t* current_match = global_cache.FetchNext();
if (current_match == NULL) {
if (global_cache.HasException()) return isolate->heap()->exception();
return *subject;
}
int start = current_match[0];
int end = current_match[1];
int capture_count = regexp->CaptureCount();
int subject_length = subject->length();
int new_length = subject_length - (end - start);
if (new_length == 0) return isolate->heap()->empty_string();
Handle<ResultSeqString> answer;
if (ResultSeqString::kHasOneByteEncoding) {
answer = Handle<ResultSeqString>::cast(
isolate->factory()->NewRawOneByteString(new_length).ToHandleChecked());
} else {
answer = Handle<ResultSeqString>::cast(
isolate->factory()->NewRawTwoByteString(new_length).ToHandleChecked());
}
int prev = 0;
int position = 0;
do {
start = current_match[0];
end = current_match[1];
if (prev < start) {
// Add substring subject[prev;start] to answer string.
String::WriteToFlat(*subject, answer->GetChars() + position, prev, start);
position += start - prev;
}
prev = end;
current_match = global_cache.FetchNext();
} while (current_match != NULL);
if (global_cache.HasException()) return isolate->heap()->exception();
RegExpImpl::SetLastMatchInfo(last_match_info,
subject,
capture_count,
global_cache.LastSuccessfulMatch());
if (prev < subject_length) {
// Add substring subject[prev;length] to answer string.
String::WriteToFlat(
*subject, answer->GetChars() + position, prev, subject_length);
position += subject_length - prev;
}
if (position == 0) return isolate->heap()->empty_string();
// Shorten string and fill
int string_size = ResultSeqString::SizeFor(position);
int allocated_string_size = ResultSeqString::SizeFor(new_length);
int delta = allocated_string_size - string_size;
answer->set_length(position);
if (delta == 0) return *answer;
Address end_of_string = answer->address() + string_size;
Heap* heap = isolate->heap();
// The trimming is performed on a newly allocated object, which is on a
// fresly allocated page or on an already swept page. Hence, the sweeper
// thread can not get confused with the filler creation. No synchronization
// needed.
heap->CreateFillerObjectAt(end_of_string, delta);
heap->AdjustLiveBytes(answer->address(), -delta, Heap::FROM_MUTATOR);
return *answer;
}
RUNTIME_FUNCTION(Runtime_StringReplaceGlobalRegExpWithString) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
CONVERT_ARG_HANDLE_CHECKED(String, replacement, 2);
CONVERT_ARG_HANDLE_CHECKED(JSRegExp, regexp, 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, last_match_info, 3);
RUNTIME_ASSERT(regexp->GetFlags().is_global());
RUNTIME_ASSERT(last_match_info->HasFastObjectElements());
subject = String::Flatten(subject);
if (replacement->length() == 0) {
if (subject->HasOnlyOneByteChars()) {
return StringReplaceGlobalRegExpWithEmptyString<SeqOneByteString>(
isolate, subject, regexp, last_match_info);
} else {
return StringReplaceGlobalRegExpWithEmptyString<SeqTwoByteString>(
isolate, subject, regexp, last_match_info);
}
}
replacement = String::Flatten(replacement);
return StringReplaceGlobalRegExpWithString(
isolate, subject, regexp, replacement, last_match_info);
}
// This may return an empty MaybeHandle if an exception is thrown or
// we abort due to reaching the recursion limit.
MaybeHandle<String> StringReplaceOneCharWithString(Isolate* isolate,
Handle<String> subject,
Handle<String> search,
Handle<String> replace,
bool* found,
int recursion_limit) {
StackLimitCheck stackLimitCheck(isolate);
if (stackLimitCheck.HasOverflowed() || (recursion_limit == 0)) {
return MaybeHandle<String>();
}
recursion_limit--;
if (subject->IsConsString()) {
ConsString* cons = ConsString::cast(*subject);
Handle<String> first = Handle<String>(cons->first());
Handle<String> second = Handle<String>(cons->second());
Handle<String> new_first;
if (!StringReplaceOneCharWithString(
isolate, first, search, replace, found, recursion_limit)
.ToHandle(&new_first)) {
return MaybeHandle<String>();
}
if (*found) return isolate->factory()->NewConsString(new_first, second);
Handle<String> new_second;
if (!StringReplaceOneCharWithString(
isolate, second, search, replace, found, recursion_limit)
.ToHandle(&new_second)) {
return MaybeHandle<String>();
}
if (*found) return isolate->factory()->NewConsString(first, new_second);
return subject;
} else {
int index = Runtime::StringMatch(isolate, subject, search, 0);
if (index == -1) return subject;
*found = true;
Handle<String> first = isolate->factory()->NewSubString(subject, 0, index);
Handle<String> cons1;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, cons1,
isolate->factory()->NewConsString(first, replace),
String);
Handle<String> second =
isolate->factory()->NewSubString(subject, index + 1, subject->length());
return isolate->factory()->NewConsString(cons1, second);
}
}
RUNTIME_FUNCTION(Runtime_StringReplaceOneCharWithString) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
CONVERT_ARG_HANDLE_CHECKED(String, search, 1);
CONVERT_ARG_HANDLE_CHECKED(String, replace, 2);
// If the cons string tree is too deep, we simply abort the recursion and
// retry with a flattened subject string.
const int kRecursionLimit = 0x1000;
bool found = false;
Handle<String> result;
if (StringReplaceOneCharWithString(
isolate, subject, search, replace, &found, kRecursionLimit)
.ToHandle(&result)) {
return *result;
}
if (isolate->has_pending_exception()) return isolate->heap()->exception();
subject = String::Flatten(subject);
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
StringReplaceOneCharWithString(
isolate, subject, search, replace, &found, kRecursionLimit));
return *result;
}
// Perform string match of pattern on subject, starting at start index.
// Caller must ensure that 0 <= start_index <= sub->length(),
// and should check that pat->length() + start_index <= sub->length().
int Runtime::StringMatch(Isolate* isolate,
Handle<String> sub,
Handle<String> pat,
int start_index) {
DCHECK(0 <= start_index);
DCHECK(start_index <= sub->length());
int pattern_length = pat->length();
if (pattern_length == 0) return start_index;
int subject_length = sub->length();
if (start_index + pattern_length > subject_length) return -1;
sub = String::Flatten(sub);
pat = String::Flatten(pat);
DisallowHeapAllocation no_gc; // ensure vectors stay valid
// Extract flattened substrings of cons strings before getting encoding.
String::FlatContent seq_sub = sub->GetFlatContent();
String::FlatContent seq_pat = pat->GetFlatContent();
// dispatch on type of strings
if (seq_pat.IsOneByte()) {
Vector<const uint8_t> pat_vector = seq_pat.ToOneByteVector();
if (seq_sub.IsOneByte()) {
return SearchString(isolate,
seq_sub.ToOneByteVector(),
pat_vector,
start_index);
}
return SearchString(isolate,
seq_sub.ToUC16Vector(),
pat_vector,
start_index);
}
Vector<const uc16> pat_vector = seq_pat.ToUC16Vector();
if (seq_sub.IsOneByte()) {
return SearchString(isolate,
seq_sub.ToOneByteVector(),
pat_vector,
start_index);
}
return SearchString(isolate,
seq_sub.ToUC16Vector(),
pat_vector,
start_index);
}
RUNTIME_FUNCTION(Runtime_StringIndexOf) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, sub, 0);
CONVERT_ARG_HANDLE_CHECKED(String, pat, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, index, 2);
uint32_t start_index;
if (!index->ToArrayIndex(&start_index)) return Smi::FromInt(-1);
RUNTIME_ASSERT(start_index <= static_cast<uint32_t>(sub->length()));
int position = Runtime::StringMatch(isolate, sub, pat, start_index);
return Smi::FromInt(position);
}
template <typename schar, typename pchar>
static int StringMatchBackwards(Vector<const schar> subject,
Vector<const pchar> pattern,
int idx) {
int pattern_length = pattern.length();
DCHECK(pattern_length >= 1);
DCHECK(idx + pattern_length <= subject.length());
if (sizeof(schar) == 1 && sizeof(pchar) > 1) {
for (int i = 0; i < pattern_length; i++) {
uc16 c = pattern[i];
if (c > String::kMaxOneByteCharCode) {
return -1;
}
}
}
pchar pattern_first_char = pattern[0];
for (int i = idx; i >= 0; i--) {
if (subject[i] != pattern_first_char) continue;
int j = 1;
while (j < pattern_length) {
if (pattern[j] != subject[i+j]) {
break;
}
j++;
}
if (j == pattern_length) {
return i;
}
}
return -1;
}
RUNTIME_FUNCTION(Runtime_StringLastIndexOf) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, sub, 0);
CONVERT_ARG_HANDLE_CHECKED(String, pat, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, index, 2);
uint32_t start_index;
if (!index->ToArrayIndex(&start_index)) return Smi::FromInt(-1);
uint32_t pat_length = pat->length();
uint32_t sub_length = sub->length();
if (start_index + pat_length > sub_length) {
start_index = sub_length - pat_length;
}
if (pat_length == 0) {
return Smi::FromInt(start_index);
}
sub = String::Flatten(sub);
pat = String::Flatten(pat);
int position = -1;
DisallowHeapAllocation no_gc; // ensure vectors stay valid
String::FlatContent sub_content = sub->GetFlatContent();
String::FlatContent pat_content = pat->GetFlatContent();
if (pat_content.IsOneByte()) {
Vector<const uint8_t> pat_vector = pat_content.ToOneByteVector();
if (sub_content.IsOneByte()) {
position = StringMatchBackwards(sub_content.ToOneByteVector(),
pat_vector,
start_index);
} else {
position = StringMatchBackwards(sub_content.ToUC16Vector(),
pat_vector,
start_index);
}
} else {
Vector<const uc16> pat_vector = pat_content.ToUC16Vector();
if (sub_content.IsOneByte()) {
position = StringMatchBackwards(sub_content.ToOneByteVector(),
pat_vector,
start_index);
} else {
position = StringMatchBackwards(sub_content.ToUC16Vector(),
pat_vector,
start_index);
}
}
return Smi::FromInt(position);
}
RUNTIME_FUNCTION(Runtime_StringLocaleCompare) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, str1, 0);
CONVERT_ARG_HANDLE_CHECKED(String, str2, 1);
if (str1.is_identical_to(str2)) return Smi::FromInt(0); // Equal.
int str1_length = str1->length();
int str2_length = str2->length();
// Decide trivial cases without flattening.
if (str1_length == 0) {
if (str2_length == 0) return Smi::FromInt(0); // Equal.
return Smi::FromInt(-str2_length);
} else {
if (str2_length == 0) return Smi::FromInt(str1_length);
}
int end = str1_length < str2_length ? str1_length : str2_length;
// No need to flatten if we are going to find the answer on the first
// character. At this point we know there is at least one character
// in each string, due to the trivial case handling above.
int d = str1->Get(0) - str2->Get(0);
if (d != 0) return Smi::FromInt(d);
str1 = String::Flatten(str1);
str2 = String::Flatten(str2);
DisallowHeapAllocation no_gc;
String::FlatContent flat1 = str1->GetFlatContent();
String::FlatContent flat2 = str2->GetFlatContent();
for (int i = 0; i < end; i++) {
if (flat1.Get(i) != flat2.Get(i)) {
return Smi::FromInt(flat1.Get(i) - flat2.Get(i));
}
}
return Smi::FromInt(str1_length - str2_length);
}
RUNTIME_FUNCTION(Runtime_SubString) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, string, 0);
int start, end;
// We have a fast integer-only case here to avoid a conversion to double in
// the common case where from and to are Smis.
if (args[1]->IsSmi() && args[2]->IsSmi()) {
CONVERT_SMI_ARG_CHECKED(from_number, 1);
CONVERT_SMI_ARG_CHECKED(to_number, 2);
start = from_number;
end = to_number;
} else {
CONVERT_DOUBLE_ARG_CHECKED(from_number, 1);
CONVERT_DOUBLE_ARG_CHECKED(to_number, 2);
start = FastD2IChecked(from_number);
end = FastD2IChecked(to_number);
}
RUNTIME_ASSERT(end >= start);
RUNTIME_ASSERT(start >= 0);
RUNTIME_ASSERT(end <= string->length());
isolate->counters()->sub_string_runtime()->Increment();
return *isolate->factory()->NewSubString(string, start, end);
}
RUNTIME_FUNCTION(Runtime_InternalizeString) {
HandleScope handles(isolate);
RUNTIME_ASSERT(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, string, 0);
return *isolate->factory()->InternalizeString(string);
}
RUNTIME_FUNCTION(Runtime_StringMatch) {
HandleScope handles(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
CONVERT_ARG_HANDLE_CHECKED(JSRegExp, regexp, 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, regexp_info, 2);
RUNTIME_ASSERT(regexp_info->HasFastObjectElements());
RegExpImpl::GlobalCache global_cache(regexp, subject, true, isolate);
if (global_cache.HasException()) return isolate->heap()->exception();
int capture_count = regexp->CaptureCount();
ZoneScope zone_scope(isolate->runtime_zone());
ZoneList<int> offsets(8, zone_scope.zone());
while (true) {
int32_t* match = global_cache.FetchNext();
if (match == NULL) break;
offsets.Add(match[0], zone_scope.zone()); // start
offsets.Add(match[1], zone_scope.zone()); // end
}
if (global_cache.HasException()) return isolate->heap()->exception();
if (offsets.length() == 0) {
// Not a single match.
return isolate->heap()->null_value();
}
RegExpImpl::SetLastMatchInfo(regexp_info,
subject,
capture_count,
global_cache.LastSuccessfulMatch());
int matches = offsets.length() / 2;
Handle<FixedArray> elements = isolate->factory()->NewFixedArray(matches);
Handle<String> substring =
isolate->factory()->NewSubString(subject, offsets.at(0), offsets.at(1));
elements->set(0, *substring);
for (int i = 1; i < matches; i++) {
HandleScope temp_scope(isolate);
int from = offsets.at(i * 2);
int to = offsets.at(i * 2 + 1);
Handle<String> substring =
isolate->factory()->NewProperSubString(subject, from, to);
elements->set(i, *substring);
}
Handle<JSArray> result = isolate->factory()->NewJSArrayWithElements(elements);
result->set_length(Smi::FromInt(matches));
return *result;
}
// Only called from Runtime_RegExpExecMultiple so it doesn't need to maintain
// separate last match info. See comment on that function.
template<bool has_capture>
static Object* SearchRegExpMultiple(
Isolate* isolate,
Handle<String> subject,
Handle<JSRegExp> regexp,
Handle<JSArray> last_match_array,
Handle<JSArray> result_array) {
DCHECK(subject->IsFlat());
DCHECK_NE(has_capture, regexp->CaptureCount() == 0);
int capture_count = regexp->CaptureCount();
int subject_length = subject->length();
static const int kMinLengthToCache = 0x1000;
if (subject_length > kMinLengthToCache) {
Handle<Object> cached_answer(RegExpResultsCache::Lookup(
isolate->heap(),
*subject,
regexp->data(),
RegExpResultsCache::REGEXP_MULTIPLE_INDICES), isolate);
if (*cached_answer != Smi::FromInt(0)) {
Handle<FixedArray> cached_fixed_array =
Handle<FixedArray>(FixedArray::cast(*cached_answer));
// The cache FixedArray is a COW-array and can therefore be reused.
JSArray::SetContent(result_array, cached_fixed_array);
// The actual length of the result array is stored in the last element of
// the backing store (the backing FixedArray may have a larger capacity).
Object* cached_fixed_array_last_element =
cached_fixed_array->get(cached_fixed_array->length() - 1);
Smi* js_array_length = Smi::cast(cached_fixed_array_last_element);
result_array->set_length(js_array_length);
RegExpImpl::SetLastMatchInfo(
last_match_array, subject, capture_count, NULL);
return *result_array;
}
}
RegExpImpl::GlobalCache global_cache(regexp, subject, true, isolate);
if (global_cache.HasException()) return isolate->heap()->exception();
// Ensured in Runtime_RegExpExecMultiple.
DCHECK(result_array->HasFastObjectElements());
Handle<FixedArray> result_elements(
FixedArray::cast(result_array->elements()));
if (result_elements->length() < 16) {
result_elements = isolate->factory()->NewFixedArrayWithHoles(16);
}
FixedArrayBuilder builder(result_elements);
// Position to search from.
int match_start = -1;
int match_end = 0;
bool first = true;
// Two smis before and after the match, for very long strings.
static const int kMaxBuilderEntriesPerRegExpMatch = 5;
while (true) {
int32_t* current_match = global_cache.FetchNext();
if (current_match == NULL) break;
match_start = current_match[0];
builder.EnsureCapacity(kMaxBuilderEntriesPerRegExpMatch);
if (match_end < match_start) {
ReplacementStringBuilder::AddSubjectSlice(&builder,
match_end,
match_start);
}
match_end = current_match[1];
{
// Avoid accumulating new handles inside loop.
HandleScope temp_scope(isolate);
Handle<String> match;
if (!first) {
match = isolate->factory()->NewProperSubString(subject,
match_start,
match_end);
} else {
match = isolate->factory()->NewSubString(subject,
match_start,
match_end);
first = false;
}
if (has_capture) {
// Arguments array to replace function is match, captures, index and
// subject, i.e., 3 + capture count in total.
Handle<FixedArray> elements =
isolate->factory()->NewFixedArray(3 + capture_count);
elements->set(0, *match);
for (int i = 1; i <= capture_count; i++) {
int start = current_match[i * 2];
if (start >= 0) {
int end = current_match[i * 2 + 1];
DCHECK(start <= end);
Handle<String> substring =
isolate->factory()->NewSubString(subject, start, end);
elements->set(i, *substring);
} else {
DCHECK(current_match[i * 2 + 1] < 0);
elements->set(i, isolate->heap()->undefined_value());
}
}
elements->set(capture_count + 1, Smi::FromInt(match_start));
elements->set(capture_count + 2, *subject);
builder.Add(*isolate->factory()->NewJSArrayWithElements(elements));
} else {
builder.Add(*match);
}
}
}
if (global_cache.HasException()) return isolate->heap()->exception();
if (match_start >= 0) {
// Finished matching, with at least one match.
if (match_end < subject_length) {
ReplacementStringBuilder::AddSubjectSlice(&builder,
match_end,
subject_length);
}
RegExpImpl::SetLastMatchInfo(
last_match_array, subject, capture_count, NULL);
if (subject_length > kMinLengthToCache) {
// Store the length of the result array into the last element of the
// backing FixedArray.
builder.EnsureCapacity(1);
Handle<FixedArray> fixed_array = builder.array();
fixed_array->set(fixed_array->length() - 1,
Smi::FromInt(builder.length()));
// Cache the result and turn the FixedArray into a COW array.
RegExpResultsCache::Enter(isolate,
subject,
handle(regexp->data(), isolate),
fixed_array,
RegExpResultsCache::REGEXP_MULTIPLE_INDICES);
}
return *builder.ToJSArray(result_array);
} else {
return isolate->heap()->null_value(); // No matches at all.
}
}
// This is only called for StringReplaceGlobalRegExpWithFunction. This sets
// lastMatchInfoOverride to maintain the last match info, so we don't need to
// set any other last match array info.
RUNTIME_FUNCTION(Runtime_RegExpExecMultiple) {
HandleScope handles(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 1);
CONVERT_ARG_HANDLE_CHECKED(JSRegExp, regexp, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArray, last_match_info, 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, result_array, 3);
RUNTIME_ASSERT(last_match_info->HasFastObjectElements());
RUNTIME_ASSERT(result_array->HasFastObjectElements());
subject = String::Flatten(subject);
RUNTIME_ASSERT(regexp->GetFlags().is_global());
if (regexp->CaptureCount() == 0) {
return SearchRegExpMultiple<false>(
isolate, subject, regexp, last_match_info, result_array);
} else {
return SearchRegExpMultiple<true>(
isolate, subject, regexp, last_match_info, result_array);
}
}
RUNTIME_FUNCTION(Runtime_NumberToRadixString) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_SMI_ARG_CHECKED(radix, 1);
RUNTIME_ASSERT(2 <= radix && radix <= 36);
// Fast case where the result is a one character string.
if (args[0]->IsSmi()) {
int value = args.smi_at(0);
if (value >= 0 && value < radix) {
// Character array used for conversion.
static const char kCharTable[] = "0123456789abcdefghijklmnopqrstuvwxyz";
return *isolate->factory()->
LookupSingleCharacterStringFromCode(kCharTable[value]);
}
}
// Slow case.
CONVERT_DOUBLE_ARG_CHECKED(value, 0);
if (std::isnan(value)) {
return isolate->heap()->nan_string();
}
if (std::isinf(value)) {
if (value < 0) {
return isolate->heap()->minus_infinity_string();
}
return isolate->heap()->infinity_string();
}
char* str = DoubleToRadixCString(value, radix);
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
RUNTIME_FUNCTION(Runtime_NumberToFixed) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(value, 0);
CONVERT_DOUBLE_ARG_CHECKED(f_number, 1);
int f = FastD2IChecked(f_number);
// See DoubleToFixedCString for these constants:
RUNTIME_ASSERT(f >= 0 && f <= 20);
RUNTIME_ASSERT(!Double(value).IsSpecial());
char* str = DoubleToFixedCString(value, f);
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
RUNTIME_FUNCTION(Runtime_NumberToExponential) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(value, 0);
CONVERT_DOUBLE_ARG_CHECKED(f_number, 1);
int f = FastD2IChecked(f_number);
RUNTIME_ASSERT(f >= -1 && f <= 20);
RUNTIME_ASSERT(!Double(value).IsSpecial());
char* str = DoubleToExponentialCString(value, f);
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
RUNTIME_FUNCTION(Runtime_NumberToPrecision) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(value, 0);
CONVERT_DOUBLE_ARG_CHECKED(f_number, 1);
int f = FastD2IChecked(f_number);
RUNTIME_ASSERT(f >= 1 && f <= 21);
RUNTIME_ASSERT(!Double(value).IsSpecial());
char* str = DoubleToPrecisionCString(value, f);
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
RUNTIME_FUNCTION(Runtime_IsValidSmi) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_CHECKED(int32_t, number, Int32, args[0]);
return isolate->heap()->ToBoolean(Smi::IsValid(number));
}
// Returns a single character string where first character equals
// string->Get(index).
static Handle<Object> GetCharAt(Handle<String> string, uint32_t index) {
if (index < static_cast<uint32_t>(string->length())) {
Factory* factory = string->GetIsolate()->factory();
return factory->LookupSingleCharacterStringFromCode(
String::Flatten(string)->Get(index));
}
return Execution::CharAt(string, index);
}
MaybeHandle<Object> Runtime::GetElementOrCharAt(Isolate* isolate,
Handle<Object> object,
uint32_t index) {
// Handle [] indexing on Strings
if (object->IsString()) {
Handle<Object> result = GetCharAt(Handle<String>::cast(object), index);
if (!result->IsUndefined()) return result;
}
// Handle [] indexing on String objects
if (object->IsStringObjectWithCharacterAt(index)) {
Handle<JSValue> js_value = Handle<JSValue>::cast(object);
Handle<Object> result =
GetCharAt(Handle<String>(String::cast(js_value->value())), index);
if (!result->IsUndefined()) return result;
}
Handle<Object> result;
if (object->IsString() || object->IsNumber() || object->IsBoolean()) {
PrototypeIterator iter(isolate, object);
return Object::GetElement(isolate, PrototypeIterator::GetCurrent(iter),
index);
} else {
return Object::GetElement(isolate, object, index);
}
}
MUST_USE_RESULT
static MaybeHandle<Name> ToName(Isolate* isolate, Handle<Object> key) {
if (key->IsName()) {
return Handle<Name>::cast(key);
} else {
Handle<Object> converted;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, converted, Execution::ToString(isolate, key), Name);
return Handle<Name>::cast(converted);
}
}
MaybeHandle<Object> Runtime::HasObjectProperty(Isolate* isolate,
Handle<JSReceiver> object,
Handle<Object> key) {
Maybe<bool> maybe;
// Check if the given key is an array index.
uint32_t index;
if (key->ToArrayIndex(&index)) {
maybe = JSReceiver::HasElement(object, index);
} else {
// Convert the key to a name - possibly by calling back into JavaScript.
Handle<Name> name;
ASSIGN_RETURN_ON_EXCEPTION(isolate, name, ToName(isolate, key), Object);
maybe = JSReceiver::HasProperty(object, name);
}
if (!maybe.has_value) return MaybeHandle<Object>();
return isolate->factory()->ToBoolean(maybe.value);
}
MaybeHandle<Object> Runtime::GetObjectProperty(Isolate* isolate,
Handle<Object> object,
Handle<Object> key) {
if (object->IsUndefined() || object->IsNull()) {
Handle<Object> args[2] = { key, object };
THROW_NEW_ERROR(isolate, NewTypeError("non_object_property_load",
HandleVector(args, 2)),
Object);
}
// Check if the given key is an array index.
uint32_t index;
if (key->ToArrayIndex(&index)) {
return GetElementOrCharAt(isolate, object, index);
}
// Convert the key to a name - possibly by calling back into JavaScript.
Handle<Name> name;
ASSIGN_RETURN_ON_EXCEPTION(isolate, name, ToName(isolate, key), Object);
// Check if the name is trivially convertible to an index and get
// the element if so.
if (name->AsArrayIndex(&index)) {
return GetElementOrCharAt(isolate, object, index);
} else {
return Object::GetProperty(object, name);
}
}
RUNTIME_FUNCTION(Runtime_GetProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Runtime::GetObjectProperty(isolate, object, key));
return *result;
}
// KeyedGetProperty is called from KeyedLoadIC::GenerateGeneric.
RUNTIME_FUNCTION(Runtime_KeyedGetProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver_obj, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key_obj, 1);
// Fast cases for getting named properties of the receiver JSObject
// itself.
//
// The global proxy objects has to be excluded since LookupOwn on
// the global proxy object can return a valid result even though the
// global proxy object never has properties. This is the case
// because the global proxy object forwards everything to its hidden
// prototype including own lookups.
//
// Additionally, we need to make sure that we do not cache results
// for objects that require access checks.
if (receiver_obj->IsJSObject()) {
if (!receiver_obj->IsJSGlobalProxy() &&
!receiver_obj->IsAccessCheckNeeded() &&
key_obj->IsName()) {
DisallowHeapAllocation no_allocation;
Handle<JSObject> receiver = Handle<JSObject>::cast(receiver_obj);
Handle<Name> key = Handle<Name>::cast(key_obj);
if (receiver->HasFastProperties()) {
// Attempt to use lookup cache.
Handle<Map> receiver_map(receiver->map(), isolate);
KeyedLookupCache* keyed_lookup_cache = isolate->keyed_lookup_cache();
int index = keyed_lookup_cache->Lookup(receiver_map, key);
if (index != -1) {
// Doubles are not cached, so raw read the value.
return receiver->RawFastPropertyAt(
FieldIndex::ForKeyedLookupCacheIndex(*receiver_map, index));
}
// Lookup cache miss. Perform lookup and update the cache if
// appropriate.
LookupIterator it(receiver, key, LookupIterator::OWN);
if (it.state() == LookupIterator::DATA &&
it.property_details().type() == FIELD) {
FieldIndex field_index = it.GetFieldIndex();
// Do not track double fields in the keyed lookup cache. Reading
// double values requires boxing.
if (!it.representation().IsDouble()) {
keyed_lookup_cache->Update(receiver_map, key,
field_index.GetKeyedLookupCacheIndex());
}
AllowHeapAllocation allow_allocation;
return *JSObject::FastPropertyAt(receiver, it.representation(),
field_index);
}
} else {
// Attempt dictionary lookup.
NameDictionary* dictionary = receiver->property_dictionary();
int entry = dictionary->FindEntry(key);
if ((entry != NameDictionary::kNotFound) &&
(dictionary->DetailsAt(entry).type() == NORMAL)) {
Object* value = dictionary->ValueAt(entry);
if (!receiver->IsGlobalObject()) return value;
value = PropertyCell::cast(value)->value();
if (!value->IsTheHole()) return value;
// If value is the hole (meaning, absent) do the general lookup.
}
}
} else if (key_obj->IsSmi()) {
// JSObject without a name key. If the key is a Smi, check for a
// definite out-of-bounds access to elements, which is a strong indicator
// that subsequent accesses will also call the runtime. Proactively
// transition elements to FAST_*_ELEMENTS to avoid excessive boxing of
// doubles for those future calls in the case that the elements would
// become FAST_DOUBLE_ELEMENTS.
Handle<JSObject> js_object = Handle<JSObject>::cast(receiver_obj);
ElementsKind elements_kind = js_object->GetElementsKind();
if (IsFastDoubleElementsKind(elements_kind)) {
Handle<Smi> key = Handle<Smi>::cast(key_obj);
if (key->value() >= js_object->elements()->length()) {
if (IsFastHoleyElementsKind(elements_kind)) {
elements_kind = FAST_HOLEY_ELEMENTS;
} else {
elements_kind = FAST_ELEMENTS;
}
RETURN_FAILURE_ON_EXCEPTION(
isolate, TransitionElements(js_object, elements_kind, isolate));
}
} else {
DCHECK(IsFastSmiOrObjectElementsKind(elements_kind) ||
!IsFastElementsKind(elements_kind));
}
}
} else if (receiver_obj->IsString() && key_obj->IsSmi()) {
// Fast case for string indexing using [] with a smi index.
Handle<String> str = Handle<String>::cast(receiver_obj);
int index = args.smi_at(1);
if (index >= 0 && index < str->length()) {
return *GetCharAt(str, index);
}
}
// Fall back to GetObjectProperty.
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Runtime::GetObjectProperty(isolate, receiver_obj, key_obj));
return *result;
}
static bool IsValidAccessor(Handle<Object> obj) {
return obj->IsUndefined() || obj->IsSpecFunction() || obj->IsNull();
}
// Transform getter or setter into something DefineAccessor can handle.
static Handle<Object> InstantiateAccessorComponent(Isolate* isolate,
Handle<Object> component) {
if (component->IsUndefined()) return isolate->factory()->undefined_value();
Handle<FunctionTemplateInfo> info =
Handle<FunctionTemplateInfo>::cast(component);
return Utils::OpenHandle(*Utils::ToLocal(info)->GetFunction());
}
RUNTIME_FUNCTION(Runtime_DefineApiAccessorProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 5);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, getter, 2);
CONVERT_ARG_HANDLE_CHECKED(Object, setter, 3);
CONVERT_SMI_ARG_CHECKED(attribute, 4);
RUNTIME_ASSERT(getter->IsUndefined() || getter->IsFunctionTemplateInfo());
RUNTIME_ASSERT(setter->IsUndefined() || setter->IsFunctionTemplateInfo());
RUNTIME_ASSERT(PropertyDetails::AttributesField::is_valid(
static_cast<PropertyAttributes>(attribute)));
RETURN_FAILURE_ON_EXCEPTION(
isolate, JSObject::DefineAccessor(
object, name, InstantiateAccessorComponent(isolate, getter),
InstantiateAccessorComponent(isolate, setter),
static_cast<PropertyAttributes>(attribute)));
return isolate->heap()->undefined_value();
}
// Implements part of 8.12.9 DefineOwnProperty.
// There are 3 cases that lead here:
// Step 4b - define a new accessor property.
// Steps 9c & 12 - replace an existing data property with an accessor property.
// Step 12 - update an existing accessor property with an accessor or generic
// descriptor.
RUNTIME_FUNCTION(Runtime_DefineAccessorPropertyUnchecked) {
HandleScope scope(isolate);
DCHECK(args.length() == 5);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
RUNTIME_ASSERT(!obj->IsNull());
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, getter, 2);
RUNTIME_ASSERT(IsValidAccessor(getter));
CONVERT_ARG_HANDLE_CHECKED(Object, setter, 3);
RUNTIME_ASSERT(IsValidAccessor(setter));
CONVERT_SMI_ARG_CHECKED(unchecked, 4);
RUNTIME_ASSERT((unchecked & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
PropertyAttributes attr = static_cast<PropertyAttributes>(unchecked);
bool fast = obj->HasFastProperties();
RETURN_FAILURE_ON_EXCEPTION(
isolate, JSObject::DefineAccessor(obj, name, getter, setter, attr));
if (fast) JSObject::MigrateSlowToFast(obj, 0);
return isolate->heap()->undefined_value();
}
// Implements part of 8.12.9 DefineOwnProperty.
// There are 3 cases that lead here:
// Step 4a - define a new data property.
// Steps 9b & 12 - replace an existing accessor property with a data property.
// Step 12 - update an existing data property with a data or generic
// descriptor.
RUNTIME_FUNCTION(Runtime_DefineDataPropertyUnchecked) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSObject, js_object, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, obj_value, 2);
CONVERT_SMI_ARG_CHECKED(unchecked, 3);
RUNTIME_ASSERT((unchecked & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
PropertyAttributes attr = static_cast<PropertyAttributes>(unchecked);
LookupIterator it(js_object, name, LookupIterator::OWN_SKIP_INTERCEPTOR);
if (it.IsFound() && it.state() == LookupIterator::ACCESS_CHECK) {
if (!isolate->MayNamedAccess(js_object, name, v8::ACCESS_SET)) {
return isolate->heap()->undefined_value();
}
it.Next();
}
// Take special care when attributes are different and there is already
// a property.
if (it.state() == LookupIterator::ACCESSOR) {
// Use IgnoreAttributes version since a readonly property may be
// overridden and SetProperty does not allow this.
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSObject::SetOwnPropertyIgnoreAttributes(
js_object, name, obj_value, attr,
JSObject::DONT_FORCE_FIELD));
return *result;
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Runtime::DefineObjectProperty(js_object, name, obj_value, attr));
return *result;
}
// Return property without being observable by accessors or interceptors.
RUNTIME_FUNCTION(Runtime_GetDataProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
return *JSObject::GetDataProperty(object, key);
}
MaybeHandle<Object> Runtime::SetObjectProperty(Isolate* isolate,
Handle<Object> object,
Handle<Object> key,
Handle<Object> value,
StrictMode strict_mode) {
if (object->IsUndefined() || object->IsNull()) {
Handle<Object> args[2] = { key, object };
THROW_NEW_ERROR(isolate, NewTypeError("non_object_property_store",
HandleVector(args, 2)),
Object);
}
if (object->IsJSProxy()) {
Handle<Object> name_object;
if (key->IsSymbol()) {
name_object = key;
} else {
ASSIGN_RETURN_ON_EXCEPTION(
isolate, name_object, Execution::ToString(isolate, key), Object);
}
Handle<Name> name = Handle<Name>::cast(name_object);
return Object::SetProperty(Handle<JSProxy>::cast(object), name, value,
strict_mode);
}
// Check if the given key is an array index.
uint32_t index;
if (key->ToArrayIndex(&index)) {
// TODO(verwaest): Support non-JSObject receivers.
if (!object->IsJSObject()) return value;
Handle<JSObject> js_object = Handle<JSObject>::cast(object);
// In Firefox/SpiderMonkey, Safari and Opera you can access the characters
// of a string using [] notation. We need to support this too in
// JavaScript.
// In the case of a String object we just need to redirect the assignment to
// the underlying string if the index is in range. Since the underlying
// string does nothing with the assignment then we can ignore such
// assignments.
if (js_object->IsStringObjectWithCharacterAt(index)) {
return value;
}
JSObject::ValidateElements(js_object);
if (js_object->HasExternalArrayElements() ||
js_object->HasFixedTypedArrayElements()) {
if (!value->IsNumber() && !value->IsUndefined()) {
ASSIGN_RETURN_ON_EXCEPTION(
isolate, value, Execution::ToNumber(isolate, value), Object);
}
}
MaybeHandle<Object> result = JSObject::SetElement(
js_object, index, value, NONE, strict_mode, true, SET_PROPERTY);
JSObject::ValidateElements(js_object);
return result.is_null() ? result : value;
}
if (key->IsName()) {
Handle<Name> name = Handle<Name>::cast(key);
if (name->AsArrayIndex(&index)) {
// TODO(verwaest): Support non-JSObject receivers.
if (!object->IsJSObject()) return value;
Handle<JSObject> js_object = Handle<JSObject>::cast(object);
if (js_object->HasExternalArrayElements()) {
if (!value->IsNumber() && !value->IsUndefined()) {
ASSIGN_RETURN_ON_EXCEPTION(
isolate, value, Execution::ToNumber(isolate, value), Object);
}
}
return JSObject::SetElement(js_object, index, value, NONE, strict_mode,
true, SET_PROPERTY);
} else {
if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));
return Object::SetProperty(object, name, value, strict_mode);
}
}
// Call-back into JavaScript to convert the key to a string.
Handle<Object> converted;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, converted, Execution::ToString(isolate, key), Object);
Handle<String> name = Handle<String>::cast(converted);
if (name->AsArrayIndex(&index)) {
// TODO(verwaest): Support non-JSObject receivers.
if (!object->IsJSObject()) return value;
Handle<JSObject> js_object = Handle<JSObject>::cast(object);
return JSObject::SetElement(js_object, index, value, NONE, strict_mode,
true, SET_PROPERTY);
}
return Object::SetProperty(object, name, value, strict_mode);
}
MaybeHandle<Object> Runtime::DefineObjectProperty(Handle<JSObject> js_object,
Handle<Object> key,
Handle<Object> value,
PropertyAttributes attr) {
Isolate* isolate = js_object->GetIsolate();
// Check if the given key is an array index.
uint32_t index;
if (key->ToArrayIndex(&index)) {
// In Firefox/SpiderMonkey, Safari and Opera you can access the characters
// of a string using [] notation. We need to support this too in
// JavaScript.
// In the case of a String object we just need to redirect the assignment to
// the underlying string if the index is in range. Since the underlying
// string does nothing with the assignment then we can ignore such
// assignments.
if (js_object->IsStringObjectWithCharacterAt(index)) {
return value;
}
return JSObject::SetElement(js_object, index, value, attr,
SLOPPY, false, DEFINE_PROPERTY);
}
if (key->IsName()) {
Handle<Name> name = Handle<Name>::cast(key);
if (name->AsArrayIndex(&index)) {
return JSObject::SetElement(js_object, index, value, attr,
SLOPPY, false, DEFINE_PROPERTY);
} else {
if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));
return JSObject::SetOwnPropertyIgnoreAttributes(js_object, name, value,
attr);
}
}
// Call-back into JavaScript to convert the key to a string.
Handle<Object> converted;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, converted, Execution::ToString(isolate, key), Object);
Handle<String> name = Handle<String>::cast(converted);
if (name->AsArrayIndex(&index)) {
return JSObject::SetElement(js_object, index, value, attr,
SLOPPY, false, DEFINE_PROPERTY);
} else {
return JSObject::SetOwnPropertyIgnoreAttributes(js_object, name, value,
attr);
}
}
MaybeHandle<Object> Runtime::DeleteObjectProperty(Isolate* isolate,
Handle<JSReceiver> receiver,
Handle<Object> key,
JSReceiver::DeleteMode mode) {
// Check if the given key is an array index.
uint32_t index;
if (key->ToArrayIndex(&index)) {
// In Firefox/SpiderMonkey, Safari and Opera you can access the
// characters of a string using [] notation. In the case of a
// String object we just need to redirect the deletion to the
// underlying string if the index is in range. Since the
// underlying string does nothing with the deletion, we can ignore
// such deletions.
if (receiver->IsStringObjectWithCharacterAt(index)) {
return isolate->factory()->true_value();
}
return JSReceiver::DeleteElement(receiver, index, mode);
}
Handle<Name> name;
if (key->IsName()) {
name = Handle<Name>::cast(key);
} else {
// Call-back into JavaScript to convert the key to a string.
Handle<Object> converted;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, converted, Execution::ToString(isolate, key), Object);
name = Handle<String>::cast(converted);
}
if (name->IsString()) name = String::Flatten(Handle<String>::cast(name));
return JSReceiver::DeleteProperty(receiver, name, mode);
}
RUNTIME_FUNCTION(Runtime_SetHiddenProperty) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(String, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
RUNTIME_ASSERT(key->IsUniqueName());
return *JSObject::SetHiddenProperty(object, key, value);
}
RUNTIME_FUNCTION(Runtime_AddNamedProperty) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
CONVERT_SMI_ARG_CHECKED(unchecked_attributes, 3);
RUNTIME_ASSERT(
(unchecked_attributes & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
// Compute attributes.
PropertyAttributes attributes =
static_cast<PropertyAttributes>(unchecked_attributes);
#ifdef DEBUG
uint32_t index = 0;
DCHECK(!key->ToArrayIndex(&index));
LookupIterator it(object, key, LookupIterator::OWN_SKIP_INTERCEPTOR);
Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
if (!maybe.has_value) return isolate->heap()->exception();
RUNTIME_ASSERT(!it.IsFound());
#endif
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSObject::SetOwnPropertyIgnoreAttributes(object, key, value, attributes));
return *result;
}
RUNTIME_FUNCTION(Runtime_AddPropertyForTemplate) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
CONVERT_SMI_ARG_CHECKED(unchecked_attributes, 3);
RUNTIME_ASSERT(
(unchecked_attributes & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
// Compute attributes.
PropertyAttributes attributes =
static_cast<PropertyAttributes>(unchecked_attributes);
#ifdef DEBUG
bool duplicate;
if (key->IsName()) {
LookupIterator it(object, Handle<Name>::cast(key),
LookupIterator::OWN_SKIP_INTERCEPTOR);
Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
DCHECK(maybe.has_value);
duplicate = it.IsFound();
} else {
uint32_t index = 0;
RUNTIME_ASSERT(key->ToArrayIndex(&index));
Maybe<bool> maybe = JSReceiver::HasOwnElement(object, index);
if (!maybe.has_value) return isolate->heap()->exception();
duplicate = maybe.value;
}
if (duplicate) {
Handle<Object> args[1] = { key };
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewTypeError("duplicate_template_property", HandleVector(args, 1)));
}
#endif
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Runtime::DefineObjectProperty(object, key, value, attributes));
return *result;
}
RUNTIME_FUNCTION(Runtime_SetProperty) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
CONVERT_STRICT_MODE_ARG_CHECKED(strict_mode_arg, 3);
StrictMode strict_mode = strict_mode_arg;
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Runtime::SetObjectProperty(isolate, object, key, value, strict_mode));
return *result;
}
// Adds an element to an array.
// This is used to create an indexed data property into an array.
RUNTIME_FUNCTION(Runtime_AddElement) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, key, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
CONVERT_SMI_ARG_CHECKED(unchecked_attributes, 3);
RUNTIME_ASSERT(
(unchecked_attributes & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
// Compute attributes.
PropertyAttributes attributes =
static_cast<PropertyAttributes>(unchecked_attributes);
uint32_t index = 0;
key->ToArrayIndex(&index);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, JSObject::SetElement(object, index, value, attributes,
SLOPPY, false, DEFINE_PROPERTY));
return *result;
}
RUNTIME_FUNCTION(Runtime_TransitionElementsKind) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
CONVERT_ARG_HANDLE_CHECKED(Map, map, 1);
JSObject::TransitionElementsKind(array, map->elements_kind());
return *array;
}
// Set the native flag on the function.
// This is used to decide if we should transform null and undefined
// into the global object when doing call and apply.
RUNTIME_FUNCTION(Runtime_SetNativeFlag) {
SealHandleScope shs(isolate);
RUNTIME_ASSERT(args.length() == 1);
CONVERT_ARG_CHECKED(Object, object, 0);
if (object->IsJSFunction()) {
JSFunction* func = JSFunction::cast(object);
func->shared()->set_native(true);
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_SetInlineBuiltinFlag) {
SealHandleScope shs(isolate);
RUNTIME_ASSERT(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
if (object->IsJSFunction()) {
JSFunction* func = JSFunction::cast(*object);
func->shared()->set_inline_builtin(true);
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_StoreArrayLiteralElement) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 5);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_SMI_ARG_CHECKED(store_index, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, literals, 3);
CONVERT_SMI_ARG_CHECKED(literal_index, 4);
Object* raw_literal_cell = literals->get(literal_index);
JSArray* boilerplate = NULL;
if (raw_literal_cell->IsAllocationSite()) {
AllocationSite* site = AllocationSite::cast(raw_literal_cell);
boilerplate = JSArray::cast(site->transition_info());
} else {
boilerplate = JSArray::cast(raw_literal_cell);
}
Handle<JSArray> boilerplate_object(boilerplate);
ElementsKind elements_kind = object->GetElementsKind();
DCHECK(IsFastElementsKind(elements_kind));
// Smis should never trigger transitions.
DCHECK(!value->IsSmi());
if (value->IsNumber()) {
DCHECK(IsFastSmiElementsKind(elements_kind));
ElementsKind transitioned_kind = IsFastHoleyElementsKind(elements_kind)
? FAST_HOLEY_DOUBLE_ELEMENTS
: FAST_DOUBLE_ELEMENTS;
if (IsMoreGeneralElementsKindTransition(
boilerplate_object->GetElementsKind(),
transitioned_kind)) {
JSObject::TransitionElementsKind(boilerplate_object, transitioned_kind);
}
JSObject::TransitionElementsKind(object, transitioned_kind);
DCHECK(IsFastDoubleElementsKind(object->GetElementsKind()));
FixedDoubleArray* double_array = FixedDoubleArray::cast(object->elements());
HeapNumber* number = HeapNumber::cast(*value);
double_array->set(store_index, number->Number());
} else {
if (!IsFastObjectElementsKind(elements_kind)) {
ElementsKind transitioned_kind = IsFastHoleyElementsKind(elements_kind)
? FAST_HOLEY_ELEMENTS
: FAST_ELEMENTS;
JSObject::TransitionElementsKind(object, transitioned_kind);
ElementsKind boilerplate_elements_kind =
boilerplate_object->GetElementsKind();
if (IsMoreGeneralElementsKindTransition(boilerplate_elements_kind,
transitioned_kind)) {
JSObject::TransitionElementsKind(boilerplate_object, transitioned_kind);
}
}
FixedArray* object_array = FixedArray::cast(object->elements());
object_array->set(store_index, *value);
}
return *object;
}
// Check whether debugger and is about to step into the callback that is passed
// to a built-in function such as Array.forEach.
RUNTIME_FUNCTION(Runtime_DebugCallbackSupportsStepping) {
DCHECK(args.length() == 1);
if (!isolate->debug()->is_active() || !isolate->debug()->StepInActive()) {
return isolate->heap()->false_value();
}
CONVERT_ARG_CHECKED(Object, callback, 0);
// We do not step into the callback if it's a builtin or not even a function.
return isolate->heap()->ToBoolean(
callback->IsJSFunction() && !JSFunction::cast(callback)->IsBuiltin());
}
// Set one shot breakpoints for the callback function that is passed to a
// built-in function such as Array.forEach to enable stepping into the callback.
RUNTIME_FUNCTION(Runtime_DebugPrepareStepInIfStepping) {
DCHECK(args.length() == 1);
Debug* debug = isolate->debug();
if (!debug->IsStepping()) return isolate->heap()->undefined_value();
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
RUNTIME_ASSERT(object->IsJSFunction() || object->IsJSGeneratorObject());
Handle<JSFunction> fun;
if (object->IsJSFunction()) {
fun = Handle<JSFunction>::cast(object);
} else {
fun = Handle<JSFunction>(
Handle<JSGeneratorObject>::cast(object)->function(), isolate);
}
// When leaving the function, step out has been activated, but not performed
// if we do not leave the builtin. To be able to step into the function
// again, we need to clear the step out at this point.
debug->ClearStepOut();
debug->FloodWithOneShot(fun);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugPushPromise) {
DCHECK(args.length() == 1);
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSObject, promise, 0);
isolate->PushPromise(promise);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugPopPromise) {
DCHECK(args.length() == 0);
SealHandleScope shs(isolate);
isolate->PopPromise();
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugPromiseEvent) {
DCHECK(args.length() == 1);
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSObject, data, 0);
isolate->debug()->OnPromiseEvent(data);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugPromiseRejectEvent) {
DCHECK(args.length() == 2);
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSObject, promise, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
isolate->debug()->OnPromiseReject(promise, value);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugAsyncTaskEvent) {
DCHECK(args.length() == 1);
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(JSObject, data, 0);
isolate->debug()->OnAsyncTaskEvent(data);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DeleteProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
CONVERT_STRICT_MODE_ARG_CHECKED(strict_mode, 2);
JSReceiver::DeleteMode delete_mode = strict_mode == STRICT
? JSReceiver::STRICT_DELETION : JSReceiver::NORMAL_DELETION;
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSReceiver::DeleteProperty(object, key, delete_mode));
return *result;
}
static Object* HasOwnPropertyImplementation(Isolate* isolate,
Handle<JSObject> object,
Handle<Name> key) {
Maybe<bool> maybe = JSReceiver::HasOwnProperty(object, key);
if (!maybe.has_value) return isolate->heap()->exception();
if (maybe.value) return isolate->heap()->true_value();
// Handle hidden prototypes. If there's a hidden prototype above this thing
// then we have to check it for properties, because they are supposed to
// look like they are on this object.
PrototypeIterator iter(isolate, object);
if (!iter.IsAtEnd() &&
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter))
->map()
->is_hidden_prototype()) {
// TODO(verwaest): The recursion is not necessary for keys that are array
// indices. Removing this.
return HasOwnPropertyImplementation(
isolate, Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)),
key);
}
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
return isolate->heap()->false_value();
}
RUNTIME_FUNCTION(Runtime_HasOwnProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0)
CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
uint32_t index;
const bool key_is_array_index = key->AsArrayIndex(&index);
// Only JS objects can have properties.
if (object->IsJSObject()) {
Handle<JSObject> js_obj = Handle<JSObject>::cast(object);
// Fast case: either the key is a real named property or it is not
// an array index and there are no interceptors or hidden
// prototypes.
Maybe<bool> maybe = JSObject::HasRealNamedProperty(js_obj, key);
if (!maybe.has_value) return isolate->heap()->exception();
DCHECK(!isolate->has_pending_exception());
if (maybe.value) {
return isolate->heap()->true_value();
}
Map* map = js_obj->map();
if (!key_is_array_index &&
!map->has_named_interceptor() &&
!HeapObject::cast(map->prototype())->map()->is_hidden_prototype()) {
return isolate->heap()->false_value();
}
// Slow case.
return HasOwnPropertyImplementation(isolate,
Handle<JSObject>(js_obj),
Handle<Name>(key));
} else if (object->IsString() && key_is_array_index) {
// Well, there is one exception: Handle [] on strings.
Handle<String> string = Handle<String>::cast(object);
if (index < static_cast<uint32_t>(string->length())) {
return isolate->heap()->true_value();
}
}
return isolate->heap()->false_value();
}
RUNTIME_FUNCTION(Runtime_HasProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
Maybe<bool> maybe = JSReceiver::HasProperty(receiver, key);
if (!maybe.has_value) return isolate->heap()->exception();
return isolate->heap()->ToBoolean(maybe.value);
}
RUNTIME_FUNCTION(Runtime_HasElement) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
CONVERT_SMI_ARG_CHECKED(index, 1);
Maybe<bool> maybe = JSReceiver::HasElement(receiver, index);
if (!maybe.has_value) return isolate->heap()->exception();
return isolate->heap()->ToBoolean(maybe.value);
}
RUNTIME_FUNCTION(Runtime_IsPropertyEnumerable) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, key, 1);
Maybe<PropertyAttributes> maybe =
JSReceiver::GetOwnPropertyAttributes(object, key);
if (!maybe.has_value) return isolate->heap()->exception();
if (maybe.value == ABSENT) maybe.value = DONT_ENUM;
return isolate->heap()->ToBoolean((maybe.value & DONT_ENUM) == 0);
}
RUNTIME_FUNCTION(Runtime_GetPropertyNames) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, object, 0);
Handle<JSArray> result;
isolate->counters()->for_in()->Increment();
Handle<FixedArray> elements;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, elements,
JSReceiver::GetKeys(object, JSReceiver::INCLUDE_PROTOS));
return *isolate->factory()->NewJSArrayWithElements(elements);
}
// Returns either a FixedArray as Runtime_GetPropertyNames,
// or, if the given object has an enum cache that contains
// all enumerable properties of the object and its prototypes
// have none, the map of the object. This is used to speed up
// the check for deletions during a for-in.
RUNTIME_FUNCTION(Runtime_GetPropertyNamesFast) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSReceiver, raw_object, 0);
if (raw_object->IsSimpleEnum()) return raw_object->map();
HandleScope scope(isolate);
Handle<JSReceiver> object(raw_object);
Handle<FixedArray> content;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, content,
JSReceiver::GetKeys(object, JSReceiver::INCLUDE_PROTOS));
// Test again, since cache may have been built by preceding call.
if (object->IsSimpleEnum()) return object->map();
return *content;
}
// Find the length of the prototype chain that is to be handled as one. If a
// prototype object is hidden it is to be viewed as part of the the object it
// is prototype for.
static int OwnPrototypeChainLength(JSObject* obj) {
int count = 1;
for (PrototypeIterator iter(obj->GetIsolate(), obj);
!iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN); iter.Advance()) {
count++;
}
return count;
}
// Return the names of the own named properties.
// args[0]: object
// args[1]: PropertyAttributes as int
RUNTIME_FUNCTION(Runtime_GetOwnPropertyNames) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
if (!args[0]->IsJSObject()) {
return isolate->heap()->undefined_value();
}
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
CONVERT_SMI_ARG_CHECKED(filter_value, 1);
PropertyAttributes filter = static_cast<PropertyAttributes>(filter_value);
// Skip the global proxy as it has no properties and always delegates to the
// real global object.
if (obj->IsJSGlobalProxy()) {
// Only collect names if access is permitted.
if (obj->IsAccessCheckNeeded() &&
!isolate->MayNamedAccess(
obj, isolate->factory()->undefined_value(), v8::ACCESS_KEYS)) {
isolate->ReportFailedAccessCheck(obj, v8::ACCESS_KEYS);
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
return *isolate->factory()->NewJSArray(0);
}
PrototypeIterator iter(isolate, obj);
obj = Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
}
// Find the number of objects making up this.
int length = OwnPrototypeChainLength(*obj);
// Find the number of own properties for each of the objects.
ScopedVector<int> own_property_count(length);
int total_property_count = 0;
{
PrototypeIterator iter(isolate, obj, PrototypeIterator::START_AT_RECEIVER);
for (int i = 0; i < length; i++) {
DCHECK(!iter.IsAtEnd());
Handle<JSObject> jsproto =
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
// Only collect names if access is permitted.
if (jsproto->IsAccessCheckNeeded() &&
!isolate->MayNamedAccess(jsproto,
isolate->factory()->undefined_value(),
v8::ACCESS_KEYS)) {
isolate->ReportFailedAccessCheck(jsproto, v8::ACCESS_KEYS);
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
return *isolate->factory()->NewJSArray(0);
}
int n;
n = jsproto->NumberOfOwnProperties(filter);
own_property_count[i] = n;
total_property_count += n;
iter.Advance();
}
}
// Allocate an array with storage for all the property names.
Handle<FixedArray> names =
isolate->factory()->NewFixedArray(total_property_count);
// Get the property names.
int next_copy_index = 0;
int hidden_strings = 0;
{
PrototypeIterator iter(isolate, obj, PrototypeIterator::START_AT_RECEIVER);
for (int i = 0; i < length; i++) {
DCHECK(!iter.IsAtEnd());
Handle<JSObject> jsproto =
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
jsproto->GetOwnPropertyNames(*names, next_copy_index, filter);
if (i > 0) {
// Names from hidden prototypes may already have been added
// for inherited function template instances. Count the duplicates
// and stub them out; the final copy pass at the end ignores holes.
for (int j = next_copy_index;
j < next_copy_index + own_property_count[i]; j++) {
Object* name_from_hidden_proto = names->get(j);
for (int k = 0; k < next_copy_index; k++) {
if (names->get(k) != isolate->heap()->hidden_string()) {
Object* name = names->get(k);
if (name_from_hidden_proto == name) {
names->set(j, isolate->heap()->hidden_string());
hidden_strings++;
break;
}
}
}
}
}
next_copy_index += own_property_count[i];
// Hidden properties only show up if the filter does not skip strings.
if ((filter & STRING) == 0 && JSObject::HasHiddenProperties(jsproto)) {
hidden_strings++;
}
iter.Advance();
}
}
// Filter out name of hidden properties object and
// hidden prototype duplicates.
if (hidden_strings > 0) {
Handle<FixedArray> old_names = names;
names = isolate->factory()->NewFixedArray(
names->length() - hidden_strings);
int dest_pos = 0;
for (int i = 0; i < total_property_count; i++) {
Object* name = old_names->get(i);
if (name == isolate->heap()->hidden_string()) {
hidden_strings--;
continue;
}
names->set(dest_pos++, name);
}
DCHECK_EQ(0, hidden_strings);
}
return *isolate->factory()->NewJSArrayWithElements(names);
}
// Return the names of the own indexed properties.
// args[0]: object
RUNTIME_FUNCTION(Runtime_GetOwnElementNames) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
if (!args[0]->IsJSObject()) {
return isolate->heap()->undefined_value();
}
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
int n = obj->NumberOfOwnElements(static_cast<PropertyAttributes>(NONE));
Handle<FixedArray> names = isolate->factory()->NewFixedArray(n);
obj->GetOwnElementKeys(*names, static_cast<PropertyAttributes>(NONE));
return *isolate->factory()->NewJSArrayWithElements(names);
}
// Return information on whether an object has a named or indexed interceptor.
// args[0]: object
RUNTIME_FUNCTION(Runtime_GetInterceptorInfo) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
if (!args[0]->IsJSObject()) {
return Smi::FromInt(0);
}
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
int result = 0;
if (obj->HasNamedInterceptor()) result |= 2;
if (obj->HasIndexedInterceptor()) result |= 1;
return Smi::FromInt(result);
}
// Return property names from named interceptor.
// args[0]: object
RUNTIME_FUNCTION(Runtime_GetNamedInterceptorPropertyNames) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
if (obj->HasNamedInterceptor()) {
Handle<JSObject> result;
if (JSObject::GetKeysForNamedInterceptor(obj, obj).ToHandle(&result)) {
return *result;
}
}
return isolate->heap()->undefined_value();
}
// Return element names from indexed interceptor.
// args[0]: object
RUNTIME_FUNCTION(Runtime_GetIndexedInterceptorElementNames) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
if (obj->HasIndexedInterceptor()) {
Handle<JSObject> result;
if (JSObject::GetKeysForIndexedInterceptor(obj, obj).ToHandle(&result)) {
return *result;
}
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_OwnKeys) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSObject, raw_object, 0);
Handle<JSObject> object(raw_object);
if (object->IsJSGlobalProxy()) {
// Do access checks before going to the global object.
if (object->IsAccessCheckNeeded() &&
!isolate->MayNamedAccess(
object, isolate->factory()->undefined_value(), v8::ACCESS_KEYS)) {
isolate->ReportFailedAccessCheck(object, v8::ACCESS_KEYS);
RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
return *isolate->factory()->NewJSArray(0);
}
PrototypeIterator iter(isolate, object);
// If proxy is detached we simply return an empty array.
if (iter.IsAtEnd()) return *isolate->factory()->NewJSArray(0);
object = Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
}
Handle<FixedArray> contents;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, contents,
JSReceiver::GetKeys(object, JSReceiver::OWN_ONLY));
// Some fast paths through GetKeysInFixedArrayFor reuse a cached
// property array and since the result is mutable we have to create
// a fresh clone on each invocation.
int length = contents->length();
Handle<FixedArray> copy = isolate->factory()->NewFixedArray(length);
for (int i = 0; i < length; i++) {
Object* entry = contents->get(i);
if (entry->IsString()) {
copy->set(i, entry);
} else {
DCHECK(entry->IsNumber());
HandleScope scope(isolate);
Handle<Object> entry_handle(entry, isolate);
Handle<Object> entry_str =
isolate->factory()->NumberToString(entry_handle);
copy->set(i, *entry_str);
}
}
return *isolate->factory()->NewJSArrayWithElements(copy);
}
RUNTIME_FUNCTION(Runtime_GetArgumentsProperty) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, raw_key, 0);
// Compute the frame holding the arguments.
JavaScriptFrameIterator it(isolate);
it.AdvanceToArgumentsFrame();
JavaScriptFrame* frame = it.frame();
// Get the actual number of provided arguments.
const uint32_t n = frame->ComputeParametersCount();
// Try to convert the key to an index. If successful and within
// index return the the argument from the frame.
uint32_t index;
if (raw_key->ToArrayIndex(&index) && index < n) {
return frame->GetParameter(index);
}
HandleScope scope(isolate);
if (raw_key->IsSymbol()) {
Handle<Symbol> symbol = Handle<Symbol>::cast(raw_key);
if (symbol->Equals(isolate->native_context()->iterator_symbol())) {
return isolate->native_context()->array_values_iterator();
}
// Lookup in the initial Object.prototype object.
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Object::GetProperty(isolate->initial_object_prototype(),
Handle<Symbol>::cast(raw_key)));
return *result;
}
// Convert the key to a string.
Handle<Object> converted;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, converted, Execution::ToString(isolate, raw_key));
Handle<String> key = Handle<String>::cast(converted);
// Try to convert the string key into an array index.
if (key->AsArrayIndex(&index)) {
if (index < n) {
return frame->GetParameter(index);
} else {
Handle<Object> initial_prototype(isolate->initial_object_prototype());
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Object::GetElement(isolate, initial_prototype, index));
return *result;
}
}
// Handle special arguments properties.
if (String::Equals(isolate->factory()->length_string(), key)) {
return Smi::FromInt(n);
}
if (String::Equals(isolate->factory()->callee_string(), key)) {
JSFunction* function = frame->function();
if (function->shared()->strict_mode() == STRICT) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError("strict_arguments_callee",
HandleVector<Object>(NULL, 0)));
}
return function;
}
// Lookup in the initial Object.prototype object.
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Object::GetProperty(isolate->initial_object_prototype(), key));
return *result;
}
RUNTIME_FUNCTION(Runtime_ToFastProperties) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
if (object->IsJSObject() && !object->IsGlobalObject()) {
JSObject::MigrateSlowToFast(Handle<JSObject>::cast(object), 0);
}
return *object;
}
RUNTIME_FUNCTION(Runtime_ToBool) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, object, 0);
return isolate->heap()->ToBoolean(object->BooleanValue());
}
// Returns the type string of a value; see ECMA-262, 11.4.3 (p 47).
// Possible optimizations: put the type string into the oddballs.
RUNTIME_FUNCTION(Runtime_Typeof) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
if (obj->IsNumber()) return isolate->heap()->number_string();
HeapObject* heap_obj = HeapObject::cast(obj);
// typeof an undetectable object is 'undefined'
if (heap_obj->map()->is_undetectable()) {
return isolate->heap()->undefined_string();
}
InstanceType instance_type = heap_obj->map()->instance_type();
if (instance_type < FIRST_NONSTRING_TYPE) {
return isolate->heap()->string_string();
}
switch (instance_type) {
case ODDBALL_TYPE:
if (heap_obj->IsTrue() || heap_obj->IsFalse()) {
return isolate->heap()->boolean_string();
}
if (heap_obj->IsNull()) {
return isolate->heap()->object_string();
}
DCHECK(heap_obj->IsUndefined());
return isolate->heap()->undefined_string();
case SYMBOL_TYPE:
return isolate->heap()->symbol_string();
case JS_FUNCTION_TYPE:
case JS_FUNCTION_PROXY_TYPE:
return isolate->heap()->function_string();
default:
// For any kind of object not handled above, the spec rule for
// host objects gives that it is okay to return "object"
return isolate->heap()->object_string();
}
}
RUNTIME_FUNCTION(Runtime_Booleanize) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(Object, value_raw, 0);
CONVERT_SMI_ARG_CHECKED(token_raw, 1);
intptr_t value = reinterpret_cast<intptr_t>(value_raw);
Token::Value token = static_cast<Token::Value>(token_raw);
switch (token) {
case Token::EQ:
case Token::EQ_STRICT:
return isolate->heap()->ToBoolean(value == 0);
case Token::NE:
case Token::NE_STRICT:
return isolate->heap()->ToBoolean(value != 0);
case Token::LT:
return isolate->heap()->ToBoolean(value < 0);
case Token::GT:
return isolate->heap()->ToBoolean(value > 0);
case Token::LTE:
return isolate->heap()->ToBoolean(value <= 0);
case Token::GTE:
return isolate->heap()->ToBoolean(value >= 0);
default:
// This should only happen during natives fuzzing.
return isolate->heap()->undefined_value();
}
}
static bool AreDigits(const uint8_t*s, int from, int to) {
for (int i = from; i < to; i++) {
if (s[i] < '0' || s[i] > '9') return false;
}
return true;
}
static int ParseDecimalInteger(const uint8_t*s, int from, int to) {
DCHECK(to - from < 10); // Overflow is not possible.
DCHECK(from < to);
int d = s[from] - '0';
for (int i = from + 1; i < to; i++) {
d = 10 * d + (s[i] - '0');
}
return d;
}
RUNTIME_FUNCTION(Runtime_StringToNumber) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
subject = String::Flatten(subject);
// Fast case: short integer or some sorts of junk values.
if (subject->IsSeqOneByteString()) {
int len = subject->length();
if (len == 0) return Smi::FromInt(0);
DisallowHeapAllocation no_gc;
uint8_t const* data = Handle<SeqOneByteString>::cast(subject)->GetChars();
bool minus = (data[0] == '-');
int start_pos = (minus ? 1 : 0);
if (start_pos == len) {
return isolate->heap()->nan_value();
} else if (data[start_pos] > '9') {
// Fast check for a junk value. A valid string may start from a
// whitespace, a sign ('+' or '-'), the decimal point, a decimal digit
// or the 'I' character ('Infinity'). All of that have codes not greater
// than '9' except 'I' and .
if (data[start_pos] != 'I' && data[start_pos] != 0xa0) {
return isolate->heap()->nan_value();
}
} else if (len - start_pos < 10 && AreDigits(data, start_pos, len)) {
// The maximal/minimal smi has 10 digits. If the string has less digits
// we know it will fit into the smi-data type.
int d = ParseDecimalInteger(data, start_pos, len);
if (minus) {
if (d == 0) return isolate->heap()->minus_zero_value();
d = -d;
} else if (!subject->HasHashCode() &&
len <= String::kMaxArrayIndexSize &&
(len == 1 || data[0] != '0')) {
// String hash is not calculated yet but all the data are present.
// Update the hash field to speed up sequential convertions.
uint32_t hash = StringHasher::MakeArrayIndexHash(d, len);
#ifdef DEBUG
subject->Hash(); // Force hash calculation.
DCHECK_EQ(static_cast<int>(subject->hash_field()),
static_cast<int>(hash));
#endif
subject->set_hash_field(hash);
}
return Smi::FromInt(d);
}
}
// Slower case.
int flags = ALLOW_HEX;
if (FLAG_harmony_numeric_literals) {
// The current spec draft has not updated "ToNumber Applied to the String
// Type", https://bugs.ecmascript.org/show_bug.cgi?id=1584
flags |= ALLOW_OCTAL | ALLOW_BINARY;
}
return *isolate->factory()->NewNumber(StringToDouble(
isolate->unicode_cache(), *subject, flags));
}
RUNTIME_FUNCTION(Runtime_NewString) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_INT32_ARG_CHECKED(length, 0);
CONVERT_BOOLEAN_ARG_CHECKED(is_one_byte, 1);
if (length == 0) return isolate->heap()->empty_string();
Handle<String> result;
if (is_one_byte) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, isolate->factory()->NewRawOneByteString(length));
} else {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, isolate->factory()->NewRawTwoByteString(length));
}
return *result;
}
RUNTIME_FUNCTION(Runtime_TruncateString) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(SeqString, string, 0);
CONVERT_INT32_ARG_CHECKED(new_length, 1);
RUNTIME_ASSERT(new_length >= 0);
return *SeqString::Truncate(string, new_length);
}
RUNTIME_FUNCTION(Runtime_URIEscape) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
Handle<String> string = String::Flatten(source);
DCHECK(string->IsFlat());
Handle<String> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
string->IsOneByteRepresentationUnderneath()
? URIEscape::Escape<uint8_t>(isolate, source)
: URIEscape::Escape<uc16>(isolate, source));
return *result;
}
RUNTIME_FUNCTION(Runtime_URIUnescape) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
Handle<String> string = String::Flatten(source);
DCHECK(string->IsFlat());
Handle<String> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
string->IsOneByteRepresentationUnderneath()
? URIUnescape::Unescape<uint8_t>(isolate, source)
: URIUnescape::Unescape<uc16>(isolate, source));
return *result;
}
RUNTIME_FUNCTION(Runtime_QuoteJSONString) {
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(String, string, 0);
DCHECK(args.length() == 1);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, BasicJsonStringifier::StringifyString(isolate, string));
return *result;
}
RUNTIME_FUNCTION(Runtime_BasicJSONStringify) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
BasicJsonStringifier stringifier(isolate);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, stringifier.Stringify(object));
return *result;
}
RUNTIME_FUNCTION(Runtime_StringParseInt) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
CONVERT_NUMBER_CHECKED(int, radix, Int32, args[1]);
RUNTIME_ASSERT(radix == 0 || (2 <= radix && radix <= 36));
subject = String::Flatten(subject);
double value;
{ DisallowHeapAllocation no_gc;
String::FlatContent flat = subject->GetFlatContent();
// ECMA-262 section 15.1.2.3, empty string is NaN
if (flat.IsOneByte()) {
value = StringToInt(
isolate->unicode_cache(), flat.ToOneByteVector(), radix);
} else {
value = StringToInt(
isolate->unicode_cache(), flat.ToUC16Vector(), radix);
}
}
return *isolate->factory()->NewNumber(value);
}
RUNTIME_FUNCTION(Runtime_StringParseFloat) {
HandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
subject = String::Flatten(subject);
double value = StringToDouble(isolate->unicode_cache(), *subject,
ALLOW_TRAILING_JUNK, base::OS::nan_value());
return *isolate->factory()->NewNumber(value);
}
static inline bool ToUpperOverflows(uc32 character) {
// y with umlauts and the micro sign are the only characters that stop
// fitting into one-byte when converting to uppercase.
static const uc32 yuml_code = 0xff;
static const uc32 micro_code = 0xb5;
return (character == yuml_code || character == micro_code);
}
template <class Converter>
MUST_USE_RESULT static Object* ConvertCaseHelper(
Isolate* isolate,
String* string,
SeqString* result,
int result_length,
unibrow::Mapping<Converter, 128>* mapping) {
DisallowHeapAllocation no_gc;
// We try this twice, once with the assumption that the result is no longer
// than the input and, if that assumption breaks, again with the exact
// length. This may not be pretty, but it is nicer than what was here before
// and I hereby claim my vaffel-is.
//
// NOTE: This assumes that the upper/lower case of an ASCII
// character is also ASCII. This is currently the case, but it
// might break in the future if we implement more context and locale
// dependent upper/lower conversions.
bool has_changed_character = false;
// Convert all characters to upper case, assuming that they will fit
// in the buffer
Access<ConsStringIteratorOp> op(
isolate->runtime_state()->string_iterator());
StringCharacterStream stream(string, op.value());
unibrow::uchar chars[Converter::kMaxWidth];
// We can assume that the string is not empty
uc32 current = stream.GetNext();
bool ignore_overflow = Converter::kIsToLower || result->IsSeqTwoByteString();
for (int i = 0; i < result_length;) {
bool has_next = stream.HasMore();
uc32 next = has_next ? stream.GetNext() : 0;
int char_length = mapping->get(current, next, chars);
if (char_length == 0) {
// The case conversion of this character is the character itself.
result->Set(i, current);
i++;
} else if (char_length == 1 &&
(ignore_overflow || !ToUpperOverflows(current))) {
// Common case: converting the letter resulted in one character.
DCHECK(static_cast<uc32>(chars[0]) != current);
result->Set(i, chars[0]);
has_changed_character = true;
i++;
} else if (result_length == string->length()) {
bool overflows = ToUpperOverflows(current);
// We've assumed that the result would be as long as the
// input but here is a character that converts to several
// characters. No matter, we calculate the exact length
// of the result and try the whole thing again.
//
// Note that this leaves room for optimization. We could just
// memcpy what we already have to the result string. Also,
// the result string is the last object allocated we could
// "realloc" it and probably, in the vast majority of cases,
// extend the existing string to be able to hold the full
// result.
int next_length = 0;
if (has_next) {
next_length = mapping->get(next, 0, chars);
if (next_length == 0) next_length = 1;
}
int current_length = i + char_length + next_length;
while (stream.HasMore()) {
current = stream.GetNext();
overflows |= ToUpperOverflows(current);
// NOTE: we use 0 as the next character here because, while
// the next character may affect what a character converts to,
// it does not in any case affect the length of what it convert
// to.
int char_length = mapping->get(current, 0, chars);
if (char_length == 0) char_length = 1;
current_length += char_length;
if (current_length > String::kMaxLength) {
AllowHeapAllocation allocate_error_and_return;
THROW_NEW_ERROR_RETURN_FAILURE(isolate,
NewInvalidStringLengthError());
}
}
// Try again with the real length. Return signed if we need
// to allocate a two-byte string for to uppercase.
return (overflows && !ignore_overflow) ? Smi::FromInt(-current_length)
: Smi::FromInt(current_length);
} else {
for (int j = 0; j < char_length; j++) {
result->Set(i, chars[j]);
i++;
}
has_changed_character = true;
}
current = next;
}
if (has_changed_character) {
return result;
} else {
// If we didn't actually change anything in doing the conversion
// we simple return the result and let the converted string
// become garbage; there is no reason to keep two identical strings
// alive.
return string;
}
}
namespace {
static const uintptr_t kOneInEveryByte = kUintptrAllBitsSet / 0xFF;
static const uintptr_t kAsciiMask = kOneInEveryByte << 7;
// Given a word and two range boundaries returns a word with high bit
// set in every byte iff the corresponding input byte was strictly in
// the range (m, n). All the other bits in the result are cleared.
// This function is only useful when it can be inlined and the
// boundaries are statically known.
// Requires: all bytes in the input word and the boundaries must be
// ASCII (less than 0x7F).
static inline uintptr_t AsciiRangeMask(uintptr_t w, char m, char n) {
// Use strict inequalities since in edge cases the function could be
// further simplified.
DCHECK(0 < m && m < n);
// Has high bit set in every w byte less than n.
uintptr_t tmp1 = kOneInEveryByte * (0x7F + n) - w;
// Has high bit set in every w byte greater than m.
uintptr_t tmp2 = w + kOneInEveryByte * (0x7F - m);
return (tmp1 & tmp2 & (kOneInEveryByte * 0x80));
}
#ifdef DEBUG
static bool CheckFastAsciiConvert(char* dst,
const char* src,
int length,
bool changed,
bool is_to_lower) {
bool expected_changed = false;
for (int i = 0; i < length; i++) {
if (dst[i] == src[i]) continue;
expected_changed = true;
if (is_to_lower) {
DCHECK('A' <= src[i] && src[i] <= 'Z');
DCHECK(dst[i] == src[i] + ('a' - 'A'));
} else {
DCHECK('a' <= src[i] && src[i] <= 'z');
DCHECK(dst[i] == src[i] - ('a' - 'A'));
}
}
return (expected_changed == changed);
}
#endif
template<class Converter>
static bool FastAsciiConvert(char* dst,
const char* src,
int length,
bool* changed_out) {
#ifdef DEBUG
char* saved_dst = dst;
const char* saved_src = src;
#endif
DisallowHeapAllocation no_gc;
// We rely on the distance between upper and lower case letters
// being a known power of 2.
DCHECK('a' - 'A' == (1 << 5));
// Boundaries for the range of input characters than require conversion.
static const char lo = Converter::kIsToLower ? 'A' - 1 : 'a' - 1;
static const char hi = Converter::kIsToLower ? 'Z' + 1 : 'z' + 1;
bool changed = false;
uintptr_t or_acc = 0;
const char* const limit = src + length;
// dst is newly allocated and always aligned.
DCHECK(IsAligned(reinterpret_cast<intptr_t>(dst), sizeof(uintptr_t)));
// Only attempt processing one word at a time if src is also aligned.
if (IsAligned(reinterpret_cast<intptr_t>(src), sizeof(uintptr_t))) {
// Process the prefix of the input that requires no conversion one aligned
// (machine) word at a time.
while (src <= limit - sizeof(uintptr_t)) {
const uintptr_t w = *reinterpret_cast<const uintptr_t*>(src);
or_acc |= w;
if (AsciiRangeMask(w, lo, hi) != 0) {
changed = true;
break;
}
*reinterpret_cast<uintptr_t*>(dst) = w;
src += sizeof(uintptr_t);
dst += sizeof(uintptr_t);
}
// Process the remainder of the input performing conversion when
// required one word at a time.
while (src <= limit - sizeof(uintptr_t)) {
const uintptr_t w = *reinterpret_cast<const uintptr_t*>(src);
or_acc |= w;
uintptr_t m = AsciiRangeMask(w, lo, hi);
// The mask has high (7th) bit set in every byte that needs
// conversion and we know that the distance between cases is
// 1 << 5.
*reinterpret_cast<uintptr_t*>(dst) = w ^ (m >> 2);
src += sizeof(uintptr_t);
dst += sizeof(uintptr_t);
}
}
// Process the last few bytes of the input (or the whole input if
// unaligned access is not supported).
while (src < limit) {
char c = *src;
or_acc |= c;
if (lo < c && c < hi) {
c ^= (1 << 5);
changed = true;
}
*dst = c;
++src;
++dst;
}
if ((or_acc & kAsciiMask) != 0) return false;
DCHECK(CheckFastAsciiConvert(
saved_dst, saved_src, length, changed, Converter::kIsToLower));
*changed_out = changed;
return true;
}
} // namespace
template <class Converter>
MUST_USE_RESULT static Object* ConvertCase(
Handle<String> s,
Isolate* isolate,
unibrow::Mapping<Converter, 128>* mapping) {
s = String::Flatten(s);
int length = s->length();
// Assume that the string is not empty; we need this assumption later
if (length == 0) return *s;
// Simpler handling of ASCII strings.
//
// NOTE: This assumes that the upper/lower case of an ASCII
// character is also ASCII. This is currently the case, but it
// might break in the future if we implement more context and locale
// dependent upper/lower conversions.
if (s->IsOneByteRepresentationUnderneath()) {
// Same length as input.
Handle<SeqOneByteString> result =
isolate->factory()->NewRawOneByteString(length).ToHandleChecked();
DisallowHeapAllocation no_gc;
String::FlatContent flat_content = s->GetFlatContent();
DCHECK(flat_content.IsFlat());
bool has_changed_character = false;
bool is_ascii = FastAsciiConvert<Converter>(
reinterpret_cast<char*>(result->GetChars()),
reinterpret_cast<const char*>(flat_content.ToOneByteVector().start()),
length,
&has_changed_character);
// If not ASCII, we discard the result and take the 2 byte path.
if (is_ascii) return has_changed_character ? *result : *s;
}
Handle<SeqString> result; // Same length as input.
if (s->IsOneByteRepresentation()) {
result = isolate->factory()->NewRawOneByteString(length).ToHandleChecked();
} else {
result = isolate->factory()->NewRawTwoByteString(length).ToHandleChecked();
}
Object* answer = ConvertCaseHelper(isolate, *s, *result, length, mapping);
if (answer->IsException() || answer->IsString()) return answer;
DCHECK(answer->IsSmi());
length = Smi::cast(answer)->value();
if (s->IsOneByteRepresentation() && length > 0) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, isolate->factory()->NewRawOneByteString(length));
} else {
if (length < 0) length = -length;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, isolate->factory()->NewRawTwoByteString(length));
}
return ConvertCaseHelper(isolate, *s, *result, length, mapping);
}
RUNTIME_FUNCTION(Runtime_StringToLowerCase) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, s, 0);
return ConvertCase(
s, isolate, isolate->runtime_state()->to_lower_mapping());
}
RUNTIME_FUNCTION(Runtime_StringToUpperCase) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, s, 0);
return ConvertCase(
s, isolate, isolate->runtime_state()->to_upper_mapping());
}
RUNTIME_FUNCTION(Runtime_StringTrim) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, string, 0);
CONVERT_BOOLEAN_ARG_CHECKED(trimLeft, 1);
CONVERT_BOOLEAN_ARG_CHECKED(trimRight, 2);
string = String::Flatten(string);
int length = string->length();
int left = 0;
UnicodeCache* unicode_cache = isolate->unicode_cache();
if (trimLeft) {
while (left < length &&
unicode_cache->IsWhiteSpaceOrLineTerminator(string->Get(left))) {
left++;
}
}
int right = length;
if (trimRight) {
while (right > left &&
unicode_cache->IsWhiteSpaceOrLineTerminator(
string->Get(right - 1))) {
right--;
}
}
return *isolate->factory()->NewSubString(string, left, right);
}
RUNTIME_FUNCTION(Runtime_StringSplit) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, subject, 0);
CONVERT_ARG_HANDLE_CHECKED(String, pattern, 1);
CONVERT_NUMBER_CHECKED(uint32_t, limit, Uint32, args[2]);
RUNTIME_ASSERT(limit > 0);
int subject_length = subject->length();
int pattern_length = pattern->length();
RUNTIME_ASSERT(pattern_length > 0);
if (limit == 0xffffffffu) {
Handle<Object> cached_answer(
RegExpResultsCache::Lookup(isolate->heap(),
*subject,
*pattern,
RegExpResultsCache::STRING_SPLIT_SUBSTRINGS),
isolate);
if (*cached_answer != Smi::FromInt(0)) {
// The cache FixedArray is a COW-array and can therefore be reused.
Handle<JSArray> result =
isolate->factory()->NewJSArrayWithElements(
Handle<FixedArray>::cast(cached_answer));
return *result;
}
}
// The limit can be very large (0xffffffffu), but since the pattern
// isn't empty, we can never create more parts than ~half the length
// of the subject.
subject = String::Flatten(subject);
pattern = String::Flatten(pattern);
static const int kMaxInitialListCapacity = 16;
ZoneScope zone_scope(isolate->runtime_zone());
// Find (up to limit) indices of separator and end-of-string in subject
int initial_capacity = Min<uint32_t>(kMaxInitialListCapacity, limit);
ZoneList<int> indices(initial_capacity, zone_scope.zone());
FindStringIndicesDispatch(isolate, *subject, *pattern,
&indices, limit, zone_scope.zone());
if (static_cast<uint32_t>(indices.length()) < limit) {
indices.Add(subject_length, zone_scope.zone());
}
// The list indices now contains the end of each part to create.
// Create JSArray of substrings separated by separator.
int part_count = indices.length();
Handle<JSArray> result = isolate->factory()->NewJSArray(part_count);
JSObject::EnsureCanContainHeapObjectElements(result);
result->set_length(Smi::FromInt(part_count));
DCHECK(result->HasFastObjectElements());
if (part_count == 1 && indices.at(0) == subject_length) {
FixedArray::cast(result->elements())->set(0, *subject);
return *result;
}
Handle<FixedArray> elements(FixedArray::cast(result->elements()));
int part_start = 0;
for (int i = 0; i < part_count; i++) {
HandleScope local_loop_handle(isolate);
int part_end = indices.at(i);
Handle<String> substring =
isolate->factory()->NewProperSubString(subject, part_start, part_end);
elements->set(i, *substring);
part_start = part_end + pattern_length;
}
if (limit == 0xffffffffu) {
if (result->HasFastObjectElements()) {
RegExpResultsCache::Enter(isolate,
subject,
pattern,
elements,
RegExpResultsCache::STRING_SPLIT_SUBSTRINGS);
}
}
return *result;
}
// Copies Latin1 characters to the given fixed array looking up
// one-char strings in the cache. Gives up on the first char that is
// not in the cache and fills the remainder with smi zeros. Returns
// the length of the successfully copied prefix.
static int CopyCachedOneByteCharsToArray(Heap* heap, const uint8_t* chars,
FixedArray* elements, int length) {
DisallowHeapAllocation no_gc;
FixedArray* one_byte_cache = heap->single_character_string_cache();
Object* undefined = heap->undefined_value();
int i;
WriteBarrierMode mode = elements->GetWriteBarrierMode(no_gc);
for (i = 0; i < length; ++i) {
Object* value = one_byte_cache->get(chars[i]);
if (value == undefined) break;
elements->set(i, value, mode);
}
if (i < length) {
DCHECK(Smi::FromInt(0) == 0);
memset(elements->data_start() + i, 0, kPointerSize * (length - i));
}
#ifdef DEBUG
for (int j = 0; j < length; ++j) {
Object* element = elements->get(j);
DCHECK(element == Smi::FromInt(0) ||
(element->IsString() && String::cast(element)->LooksValid()));
}
#endif
return i;
}
// Converts a String to JSArray.
// For example, "foo" => ["f", "o", "o"].
RUNTIME_FUNCTION(Runtime_StringToArray) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, s, 0);
CONVERT_NUMBER_CHECKED(uint32_t, limit, Uint32, args[1]);
s = String::Flatten(s);
const int length = static_cast<int>(Min<uint32_t>(s->length(), limit));
Handle<FixedArray> elements;
int position = 0;
if (s->IsFlat() && s->IsOneByteRepresentation()) {
// Try using cached chars where possible.
elements = isolate->factory()->NewUninitializedFixedArray(length);
DisallowHeapAllocation no_gc;
String::FlatContent content = s->GetFlatContent();
if (content.IsOneByte()) {
Vector<const uint8_t> chars = content.ToOneByteVector();
// Note, this will initialize all elements (not only the prefix)
// to prevent GC from seeing partially initialized array.
position = CopyCachedOneByteCharsToArray(isolate->heap(), chars.start(),
*elements, length);
} else {
MemsetPointer(elements->data_start(),
isolate->heap()->undefined_value(),
length);
}
} else {
elements = isolate->factory()->NewFixedArray(length);
}
for (int i = position; i < length; ++i) {
Handle<Object> str =
isolate->factory()->LookupSingleCharacterStringFromCode(s->Get(i));
elements->set(i, *str);
}
#ifdef DEBUG
for (int i = 0; i < length; ++i) {
DCHECK(String::cast(elements->get(i))->length() == 1);
}
#endif
return *isolate->factory()->NewJSArrayWithElements(elements);
}
RUNTIME_FUNCTION(Runtime_NewStringWrapper) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, value, 0);
return *Object::ToObject(isolate, value).ToHandleChecked();
}
bool Runtime::IsUpperCaseChar(RuntimeState* runtime_state, uint16_t ch) {
unibrow::uchar chars[unibrow::ToUppercase::kMaxWidth];
int char_length = runtime_state->to_upper_mapping()->get(ch, 0, chars);
return char_length == 0;
}
RUNTIME_FUNCTION(Runtime_NumberToStringRT) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(number, 0);
return *isolate->factory()->NumberToString(number);
}
RUNTIME_FUNCTION(Runtime_NumberToStringSkipCache) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(number, 0);
return *isolate->factory()->NumberToString(number, false);
}
RUNTIME_FUNCTION(Runtime_NumberToInteger) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(number, 0);
return *isolate->factory()->NewNumber(DoubleToInteger(number));
}
RUNTIME_FUNCTION(Runtime_NumberToIntegerMapMinusZero) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(number, 0);
double double_value = DoubleToInteger(number);
// Map both -0 and +0 to +0.
if (double_value == 0) double_value = 0;
return *isolate->factory()->NewNumber(double_value);
}
RUNTIME_FUNCTION(Runtime_NumberToJSUint32) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_CHECKED(int32_t, number, Uint32, args[0]);
return *isolate->factory()->NewNumberFromUint(number);
}
RUNTIME_FUNCTION(Runtime_NumberToJSInt32) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(number, 0);
return *isolate->factory()->NewNumberFromInt(DoubleToInt32(number));
}
// Converts a Number to a Smi, if possible. Returns NaN if the number is not
// a small integer.
RUNTIME_FUNCTION(Runtime_NumberToSmi) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
if (obj->IsSmi()) {
return obj;
}
if (obj->IsHeapNumber()) {
double value = HeapNumber::cast(obj)->value();
int int_value = FastD2I(value);
if (value == FastI2D(int_value) && Smi::IsValid(int_value)) {
return Smi::FromInt(int_value);
}
}
return isolate->heap()->nan_value();
}
RUNTIME_FUNCTION(Runtime_AllocateHeapNumber) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
return *isolate->factory()->NewHeapNumber(0);
}
RUNTIME_FUNCTION(Runtime_NumberAdd) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
return *isolate->factory()->NewNumber(x + y);
}
RUNTIME_FUNCTION(Runtime_NumberSub) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
return *isolate->factory()->NewNumber(x - y);
}
RUNTIME_FUNCTION(Runtime_NumberMul) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
return *isolate->factory()->NewNumber(x * y);
}
RUNTIME_FUNCTION(Runtime_NumberUnaryMinus) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
return *isolate->factory()->NewNumber(-x);
}
RUNTIME_FUNCTION(Runtime_NumberDiv) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
return *isolate->factory()->NewNumber(x / y);
}
RUNTIME_FUNCTION(Runtime_NumberMod) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
return *isolate->factory()->NewNumber(modulo(x, y));
}
RUNTIME_FUNCTION(Runtime_NumberImul) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
// We rely on implementation-defined behavior below, but at least not on
// undefined behavior.
CONVERT_NUMBER_CHECKED(uint32_t, x, Int32, args[0]);
CONVERT_NUMBER_CHECKED(uint32_t, y, Int32, args[1]);
int32_t product = static_cast<int32_t>(x * y);
return *isolate->factory()->NewNumberFromInt(product);
}
RUNTIME_FUNCTION(Runtime_StringAdd) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, str1, 0);
CONVERT_ARG_HANDLE_CHECKED(String, str2, 1);
isolate->counters()->string_add_runtime()->Increment();
Handle<String> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, isolate->factory()->NewConsString(str1, str2));
return *result;
}
template <typename sinkchar>
static inline void StringBuilderConcatHelper(String* special,
sinkchar* sink,
FixedArray* fixed_array,
int array_length) {
DisallowHeapAllocation no_gc;
int position = 0;
for (int i = 0; i < array_length; i++) {
Object* element = fixed_array->get(i);
if (element->IsSmi()) {
// Smi encoding of position and length.
int encoded_slice = Smi::cast(element)->value();
int pos;
int len;
if (encoded_slice > 0) {
// Position and length encoded in one smi.
pos = StringBuilderSubstringPosition::decode(encoded_slice);
len = StringBuilderSubstringLength::decode(encoded_slice);
} else {
// Position and length encoded in two smis.
Object* obj = fixed_array->get(++i);
DCHECK(obj->IsSmi());
pos = Smi::cast(obj)->value();
len = -encoded_slice;
}
String::WriteToFlat(special,
sink + position,
pos,
pos + len);
position += len;
} else {
String* string = String::cast(element);
int element_length = string->length();
String::WriteToFlat(string, sink + position, 0, element_length);
position += element_length;
}
}
}
// Returns the result length of the concatenation.
// On illegal argument, -1 is returned.
static inline int StringBuilderConcatLength(int special_length,
FixedArray* fixed_array,
int array_length,
bool* one_byte) {
DisallowHeapAllocation no_gc;
int position = 0;
for (int i = 0; i < array_length; i++) {
int increment = 0;
Object* elt = fixed_array->get(i);
if (elt->IsSmi()) {
// Smi encoding of position and length.
int smi_value = Smi::cast(elt)->value();
int pos;
int len;
if (smi_value > 0) {
// Position and length encoded in one smi.
pos = StringBuilderSubstringPosition::decode(smi_value);
len = StringBuilderSubstringLength::decode(smi_value);
} else {
// Position and length encoded in two smis.
len = -smi_value;
// Get the position and check that it is a positive smi.
i++;
if (i >= array_length) return -1;
Object* next_smi = fixed_array->get(i);
if (!next_smi->IsSmi()) return -1;
pos = Smi::cast(next_smi)->value();
if (pos < 0) return -1;
}
DCHECK(pos >= 0);
DCHECK(len >= 0);
if (pos > special_length || len > special_length - pos) return -1;
increment = len;
} else if (elt->IsString()) {
String* element = String::cast(elt);
int element_length = element->length();
increment = element_length;
if (*one_byte && !element->HasOnlyOneByteChars()) {
*one_byte = false;
}
} else {
return -1;
}
if (increment > String::kMaxLength - position) {
return kMaxInt; // Provoke throw on allocation.
}
position += increment;
}
return position;
}
RUNTIME_FUNCTION(Runtime_StringBuilderConcat) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
int32_t array_length;
if (!args[1]->ToInt32(&array_length)) {
THROW_NEW_ERROR_RETURN_FAILURE(isolate, NewInvalidStringLengthError());
}
CONVERT_ARG_HANDLE_CHECKED(String, special, 2);
size_t actual_array_length = 0;
RUNTIME_ASSERT(
TryNumberToSize(isolate, array->length(), &actual_array_length));
RUNTIME_ASSERT(array_length >= 0);
RUNTIME_ASSERT(static_cast<size_t>(array_length) <= actual_array_length);
// This assumption is used by the slice encoding in one or two smis.
DCHECK(Smi::kMaxValue >= String::kMaxLength);
RUNTIME_ASSERT(array->HasFastElements());
JSObject::EnsureCanContainHeapObjectElements(array);
int special_length = special->length();
if (!array->HasFastObjectElements()) {
return isolate->Throw(isolate->heap()->illegal_argument_string());
}
int length;
bool one_byte = special->HasOnlyOneByteChars();
{ DisallowHeapAllocation no_gc;
FixedArray* fixed_array = FixedArray::cast(array->elements());
if (fixed_array->length() < array_length) {
array_length = fixed_array->length();
}
if (array_length == 0) {
return isolate->heap()->empty_string();
} else if (array_length == 1) {
Object* first = fixed_array->get(0);
if (first->IsString()) return first;
}
length = StringBuilderConcatLength(
special_length, fixed_array, array_length, &one_byte);
}
if (length == -1) {
return isolate->Throw(isolate->heap()->illegal_argument_string());
}
if (one_byte) {
Handle<SeqOneByteString> answer;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, answer,
isolate->factory()->NewRawOneByteString(length));
StringBuilderConcatHelper(*special,
answer->GetChars(),
FixedArray::cast(array->elements()),
array_length);
return *answer;
} else {
Handle<SeqTwoByteString> answer;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, answer,
isolate->factory()->NewRawTwoByteString(length));
StringBuilderConcatHelper(*special,
answer->GetChars(),
FixedArray::cast(array->elements()),
array_length);
return *answer;
}
}
RUNTIME_FUNCTION(Runtime_StringBuilderJoin) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
int32_t array_length;
if (!args[1]->ToInt32(&array_length)) {
THROW_NEW_ERROR_RETURN_FAILURE(isolate, NewInvalidStringLengthError());
}
CONVERT_ARG_HANDLE_CHECKED(String, separator, 2);
RUNTIME_ASSERT(array->HasFastObjectElements());
RUNTIME_ASSERT(array_length >= 0);
Handle<FixedArray> fixed_array(FixedArray::cast(array->elements()));
if (fixed_array->length() < array_length) {
array_length = fixed_array->length();
}
if (array_length == 0) {
return isolate->heap()->empty_string();
} else if (array_length == 1) {
Object* first = fixed_array->get(0);
RUNTIME_ASSERT(first->IsString());
return first;
}
int separator_length = separator->length();
RUNTIME_ASSERT(separator_length > 0);
int max_nof_separators =
(String::kMaxLength + separator_length - 1) / separator_length;
if (max_nof_separators < (array_length - 1)) {
THROW_NEW_ERROR_RETURN_FAILURE(isolate, NewInvalidStringLengthError());
}
int length = (array_length - 1) * separator_length;
for (int i = 0; i < array_length; i++) {
Object* element_obj = fixed_array->get(i);
RUNTIME_ASSERT(element_obj->IsString());
String* element = String::cast(element_obj);
int increment = element->length();
if (increment > String::kMaxLength - length) {
STATIC_ASSERT(String::kMaxLength < kMaxInt);
length = kMaxInt; // Provoke exception;
break;
}
length += increment;
}
Handle<SeqTwoByteString> answer;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, answer,
isolate->factory()->NewRawTwoByteString(length));
DisallowHeapAllocation no_gc;
uc16* sink = answer->GetChars();
#ifdef DEBUG
uc16* end = sink + length;
#endif
RUNTIME_ASSERT(fixed_array->get(0)->IsString());
String* first = String::cast(fixed_array->get(0));
String* separator_raw = *separator;
int first_length = first->length();
String::WriteToFlat(first, sink, 0, first_length);
sink += first_length;
for (int i = 1; i < array_length; i++) {
DCHECK(sink + separator_length <= end);
String::WriteToFlat(separator_raw, sink, 0, separator_length);
sink += separator_length;
RUNTIME_ASSERT(fixed_array->get(i)->IsString());
String* element = String::cast(fixed_array->get(i));
int element_length = element->length();
DCHECK(sink + element_length <= end);
String::WriteToFlat(element, sink, 0, element_length);
sink += element_length;
}
DCHECK(sink == end);
// Use %_FastOneByteArrayJoin instead.
DCHECK(!answer->IsOneByteRepresentation());
return *answer;
}
template <typename Char>
static void JoinSparseArrayWithSeparator(FixedArray* elements,
int elements_length,
uint32_t array_length,
String* separator,
Vector<Char> buffer) {
DisallowHeapAllocation no_gc;
int previous_separator_position = 0;
int separator_length = separator->length();
int cursor = 0;
for (int i = 0; i < elements_length; i += 2) {
int position = NumberToInt32(elements->get(i));
String* string = String::cast(elements->get(i + 1));
int string_length = string->length();
if (string->length() > 0) {
while (previous_separator_position < position) {
String::WriteToFlat<Char>(separator, &buffer[cursor],
0, separator_length);
cursor += separator_length;
previous_separator_position++;
}
String::WriteToFlat<Char>(string, &buffer[cursor],
0, string_length);
cursor += string->length();
}
}
if (separator_length > 0) {
// Array length must be representable as a signed 32-bit number,
// otherwise the total string length would have been too large.
DCHECK(array_length <= 0x7fffffff); // Is int32_t.
int last_array_index = static_cast<int>(array_length - 1);
while (previous_separator_position < last_array_index) {
String::WriteToFlat<Char>(separator, &buffer[cursor],
0, separator_length);
cursor += separator_length;
previous_separator_position++;
}
}
DCHECK(cursor <= buffer.length());
}
RUNTIME_FUNCTION(Runtime_SparseJoinWithSeparator) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSArray, elements_array, 0);
CONVERT_NUMBER_CHECKED(uint32_t, array_length, Uint32, args[1]);
CONVERT_ARG_HANDLE_CHECKED(String, separator, 2);
// elements_array is fast-mode JSarray of alternating positions
// (increasing order) and strings.
RUNTIME_ASSERT(elements_array->HasFastSmiOrObjectElements());
// array_length is length of original array (used to add separators);
// separator is string to put between elements. Assumed to be non-empty.
RUNTIME_ASSERT(array_length > 0);
// Find total length of join result.
int string_length = 0;
bool is_one_byte = separator->IsOneByteRepresentation();
bool overflow = false;
CONVERT_NUMBER_CHECKED(int, elements_length, Int32, elements_array->length());
RUNTIME_ASSERT(elements_length <= elements_array->elements()->length());
RUNTIME_ASSERT((elements_length & 1) == 0); // Even length.
FixedArray* elements = FixedArray::cast(elements_array->elements());
for (int i = 0; i < elements_length; i += 2) {
RUNTIME_ASSERT(elements->get(i)->IsNumber());
CONVERT_NUMBER_CHECKED(uint32_t, position, Uint32, elements->get(i));
RUNTIME_ASSERT(position < array_length);
RUNTIME_ASSERT(elements->get(i + 1)->IsString());
}
{ DisallowHeapAllocation no_gc;
for (int i = 0; i < elements_length; i += 2) {
String* string = String::cast(elements->get(i + 1));
int length = string->length();
if (is_one_byte && !string->IsOneByteRepresentation()) {
is_one_byte = false;
}
if (length > String::kMaxLength ||
String::kMaxLength - length < string_length) {
overflow = true;
break;
}
string_length += length;
}
}
int separator_length = separator->length();
if (!overflow && separator_length > 0) {
if (array_length <= 0x7fffffffu) {
int separator_count = static_cast<int>(array_length) - 1;
int remaining_length = String::kMaxLength - string_length;
if ((remaining_length / separator_length) >= separator_count) {
string_length += separator_length * (array_length - 1);
} else {
// Not room for the separators within the maximal string length.
overflow = true;
}
} else {
// Nonempty separator and at least 2^31-1 separators necessary
// means that the string is too large to create.
STATIC_ASSERT(String::kMaxLength < 0x7fffffff);
overflow = true;
}
}
if (overflow) {
// Throw an exception if the resulting string is too large. See
// https://code.google.com/p/chromium/issues/detail?id=336820
// for details.
THROW_NEW_ERROR_RETURN_FAILURE(isolate, NewInvalidStringLengthError());
}
if (is_one_byte) {
Handle<SeqOneByteString> result = isolate->factory()->NewRawOneByteString(
string_length).ToHandleChecked();
JoinSparseArrayWithSeparator<uint8_t>(
FixedArray::cast(elements_array->elements()),
elements_length,
array_length,
*separator,
Vector<uint8_t>(result->GetChars(), string_length));
return *result;
} else {
Handle<SeqTwoByteString> result = isolate->factory()->NewRawTwoByteString(
string_length).ToHandleChecked();
JoinSparseArrayWithSeparator<uc16>(
FixedArray::cast(elements_array->elements()),
elements_length,
array_length,
*separator,
Vector<uc16>(result->GetChars(), string_length));
return *result;
}
}
RUNTIME_FUNCTION(Runtime_NumberOr) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
return *isolate->factory()->NewNumberFromInt(x | y);
}
RUNTIME_FUNCTION(Runtime_NumberAnd) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
return *isolate->factory()->NewNumberFromInt(x & y);
}
RUNTIME_FUNCTION(Runtime_NumberXor) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
return *isolate->factory()->NewNumberFromInt(x ^ y);
}
RUNTIME_FUNCTION(Runtime_NumberShl) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
return *isolate->factory()->NewNumberFromInt(x << (y & 0x1f));
}
RUNTIME_FUNCTION(Runtime_NumberShr) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(uint32_t, x, Uint32, args[0]);
CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
return *isolate->factory()->NewNumberFromUint(x >> (y & 0x1f));
}
RUNTIME_FUNCTION(Runtime_NumberSar) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int32_t, x, Int32, args[0]);
CONVERT_NUMBER_CHECKED(int32_t, y, Int32, args[1]);
return *isolate->factory()->NewNumberFromInt(
ArithmeticShiftRight(x, y & 0x1f));
}
RUNTIME_FUNCTION(Runtime_NumberEquals) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
if (std::isnan(x)) return Smi::FromInt(NOT_EQUAL);
if (std::isnan(y)) return Smi::FromInt(NOT_EQUAL);
if (x == y) return Smi::FromInt(EQUAL);
Object* result;
if ((fpclassify(x) == FP_ZERO) && (fpclassify(y) == FP_ZERO)) {
result = Smi::FromInt(EQUAL);
} else {
result = Smi::FromInt(NOT_EQUAL);
}
return result;
}
RUNTIME_FUNCTION(Runtime_StringEquals) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, x, 0);
CONVERT_ARG_HANDLE_CHECKED(String, y, 1);
bool not_equal = !String::Equals(x, y);
// This is slightly convoluted because the value that signifies
// equality is 0 and inequality is 1 so we have to negate the result
// from String::Equals.
DCHECK(not_equal == 0 || not_equal == 1);
STATIC_ASSERT(EQUAL == 0);
STATIC_ASSERT(NOT_EQUAL == 1);
return Smi::FromInt(not_equal);
}
RUNTIME_FUNCTION(Runtime_NumberCompare) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 3);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, uncomparable_result, 2)
if (std::isnan(x) || std::isnan(y)) return *uncomparable_result;
if (x == y) return Smi::FromInt(EQUAL);
if (isless(x, y)) return Smi::FromInt(LESS);
return Smi::FromInt(GREATER);
}
// Compare two Smis as if they were converted to strings and then
// compared lexicographically.
RUNTIME_FUNCTION(Runtime_SmiLexicographicCompare) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_SMI_ARG_CHECKED(x_value, 0);
CONVERT_SMI_ARG_CHECKED(y_value, 1);
// If the integers are equal so are the string representations.
if (x_value == y_value) return Smi::FromInt(EQUAL);
// If one of the integers is zero the normal integer order is the
// same as the lexicographic order of the string representations.
if (x_value == 0 || y_value == 0)
return Smi::FromInt(x_value < y_value ? LESS : GREATER);
// If only one of the integers is negative the negative number is
// smallest because the char code of '-' is less than the char code
// of any digit. Otherwise, we make both values positive.
// Use unsigned values otherwise the logic is incorrect for -MIN_INT on
// architectures using 32-bit Smis.
uint32_t x_scaled = x_value;
uint32_t y_scaled = y_value;
if (x_value < 0 || y_value < 0) {
if (y_value >= 0) return Smi::FromInt(LESS);
if (x_value >= 0) return Smi::FromInt(GREATER);
x_scaled = -x_value;
y_scaled = -y_value;
}
static const uint32_t kPowersOf10[] = {
1, 10, 100, 1000, 10*1000, 100*1000,
1000*1000, 10*1000*1000, 100*1000*1000,
1000*1000*1000
};
// If the integers have the same number of decimal digits they can be
// compared directly as the numeric order is the same as the
// lexicographic order. If one integer has fewer digits, it is scaled
// by some power of 10 to have the same number of digits as the longer
// integer. If the scaled integers are equal it means the shorter
// integer comes first in the lexicographic order.
// From http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
int x_log2 = IntegerLog2(x_scaled);
int x_log10 = ((x_log2 + 1) * 1233) >> 12;
x_log10 -= x_scaled < kPowersOf10[x_log10];
int y_log2 = IntegerLog2(y_scaled);
int y_log10 = ((y_log2 + 1) * 1233) >> 12;
y_log10 -= y_scaled < kPowersOf10[y_log10];
int tie = EQUAL;
if (x_log10 < y_log10) {
// X has fewer digits. We would like to simply scale up X but that
// might overflow, e.g when comparing 9 with 1_000_000_000, 9 would
// be scaled up to 9_000_000_000. So we scale up by the next
// smallest power and scale down Y to drop one digit. It is OK to
// drop one digit from the longer integer since the final digit is
// past the length of the shorter integer.
x_scaled *= kPowersOf10[y_log10 - x_log10 - 1];
y_scaled /= 10;
tie = LESS;
} else if (y_log10 < x_log10) {
y_scaled *= kPowersOf10[x_log10 - y_log10 - 1];
x_scaled /= 10;
tie = GREATER;
}
if (x_scaled < y_scaled) return Smi::FromInt(LESS);
if (x_scaled > y_scaled) return Smi::FromInt(GREATER);
return Smi::FromInt(tie);
}
RUNTIME_FUNCTION(Runtime_StringCompare) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, x, 0);
CONVERT_ARG_HANDLE_CHECKED(String, y, 1);
isolate->counters()->string_compare_runtime()->Increment();
// A few fast case tests before we flatten.
if (x.is_identical_to(y)) return Smi::FromInt(EQUAL);
if (y->length() == 0) {
if (x->length() == 0) return Smi::FromInt(EQUAL);
return Smi::FromInt(GREATER);
} else if (x->length() == 0) {
return Smi::FromInt(LESS);
}
int d = x->Get(0) - y->Get(0);
if (d < 0) return Smi::FromInt(LESS);
else if (d > 0) return Smi::FromInt(GREATER);
// Slow case.
x = String::Flatten(x);
y = String::Flatten(y);
DisallowHeapAllocation no_gc;
Object* equal_prefix_result = Smi::FromInt(EQUAL);
int prefix_length = x->length();
if (y->length() < prefix_length) {
prefix_length = y->length();
equal_prefix_result = Smi::FromInt(GREATER);
} else if (y->length() > prefix_length) {
equal_prefix_result = Smi::FromInt(LESS);
}
int r;
String::FlatContent x_content = x->GetFlatContent();
String::FlatContent y_content = y->GetFlatContent();
if (x_content.IsOneByte()) {
Vector<const uint8_t> x_chars = x_content.ToOneByteVector();
if (y_content.IsOneByte()) {
Vector<const uint8_t> y_chars = y_content.ToOneByteVector();
r = CompareChars(x_chars.start(), y_chars.start(), prefix_length);
} else {
Vector<const uc16> y_chars = y_content.ToUC16Vector();
r = CompareChars(x_chars.start(), y_chars.start(), prefix_length);
}
} else {
Vector<const uc16> x_chars = x_content.ToUC16Vector();
if (y_content.IsOneByte()) {
Vector<const uint8_t> y_chars = y_content.ToOneByteVector();
r = CompareChars(x_chars.start(), y_chars.start(), prefix_length);
} else {
Vector<const uc16> y_chars = y_content.ToUC16Vector();
r = CompareChars(x_chars.start(), y_chars.start(), prefix_length);
}
}
Object* result;
if (r == 0) {
result = equal_prefix_result;
} else {
result = (r < 0) ? Smi::FromInt(LESS) : Smi::FromInt(GREATER);
}
return result;
}
#define RUNTIME_UNARY_MATH(Name, name) \
RUNTIME_FUNCTION(Runtime_Math##Name) { \
HandleScope scope(isolate); \
DCHECK(args.length() == 1); \
isolate->counters()->math_##name()->Increment(); \
CONVERT_DOUBLE_ARG_CHECKED(x, 0); \
return *isolate->factory()->NewHeapNumber(std::name(x)); \
}
RUNTIME_UNARY_MATH(Acos, acos)
RUNTIME_UNARY_MATH(Asin, asin)
RUNTIME_UNARY_MATH(Atan, atan)
RUNTIME_UNARY_MATH(LogRT, log)
#undef RUNTIME_UNARY_MATH
RUNTIME_FUNCTION(Runtime_DoubleHi) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
uint64_t integer = double_to_uint64(x);
integer = (integer >> 32) & 0xFFFFFFFFu;
return *isolate->factory()->NewNumber(static_cast<int32_t>(integer));
}
RUNTIME_FUNCTION(Runtime_DoubleLo) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
return *isolate->factory()->NewNumber(
static_cast<int32_t>(double_to_uint64(x) & 0xFFFFFFFFu));
}
RUNTIME_FUNCTION(Runtime_ConstructDouble) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(uint32_t, hi, Uint32, args[0]);
CONVERT_NUMBER_CHECKED(uint32_t, lo, Uint32, args[1]);
uint64_t result = (static_cast<uint64_t>(hi) << 32) | lo;
return *isolate->factory()->NewNumber(uint64_to_double(result));
}
RUNTIME_FUNCTION(Runtime_RemPiO2) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
Factory* factory = isolate->factory();
double y[2] = {0.0, 0.0};
int n = fdlibm::rempio2(x, y);
Handle<FixedArray> array = factory->NewFixedArray(3);
Handle<HeapNumber> y0 = factory->NewHeapNumber(y[0]);
Handle<HeapNumber> y1 = factory->NewHeapNumber(y[1]);
array->set(0, Smi::FromInt(n));
array->set(1, *y0);
array->set(2, *y1);
return *factory->NewJSArrayWithElements(array);
}
static const double kPiDividedBy4 = 0.78539816339744830962;
RUNTIME_FUNCTION(Runtime_MathAtan2) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
isolate->counters()->math_atan2()->Increment();
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
double result;
if (std::isinf(x) && std::isinf(y)) {
// Make sure that the result in case of two infinite arguments
// is a multiple of Pi / 4. The sign of the result is determined
// by the first argument (x) and the sign of the second argument
// determines the multiplier: one or three.
int multiplier = (x < 0) ? -1 : 1;
if (y < 0) multiplier *= 3;
result = multiplier * kPiDividedBy4;
} else {
result = std::atan2(x, y);
}
return *isolate->factory()->NewNumber(result);
}
RUNTIME_FUNCTION(Runtime_MathExpRT) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
isolate->counters()->math_exp()->Increment();
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
lazily_initialize_fast_exp();
return *isolate->factory()->NewNumber(fast_exp(x));
}
RUNTIME_FUNCTION(Runtime_MathFloorRT) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
isolate->counters()->math_floor()->Increment();
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
return *isolate->factory()->NewNumber(Floor(x));
}
// Slow version of Math.pow. We check for fast paths for special cases.
// Used if VFP3 is not available.
RUNTIME_FUNCTION(Runtime_MathPowSlow) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
isolate->counters()->math_pow()->Increment();
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
// If the second argument is a smi, it is much faster to call the
// custom powi() function than the generic pow().
if (args[1]->IsSmi()) {
int y = args.smi_at(1);
return *isolate->factory()->NewNumber(power_double_int(x, y));
}
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
double result = power_helper(x, y);
if (std::isnan(result)) return isolate->heap()->nan_value();
return *isolate->factory()->NewNumber(result);
}
// Fast version of Math.pow if we know that y is not an integer and y is not
// -0.5 or 0.5. Used as slow case from full codegen.
RUNTIME_FUNCTION(Runtime_MathPowRT) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
isolate->counters()->math_pow()->Increment();
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
CONVERT_DOUBLE_ARG_CHECKED(y, 1);
if (y == 0) {
return Smi::FromInt(1);
} else {
double result = power_double_double(x, y);
if (std::isnan(result)) return isolate->heap()->nan_value();
return *isolate->factory()->NewNumber(result);
}
}
RUNTIME_FUNCTION(Runtime_RoundNumber) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(input, 0);
isolate->counters()->math_round()->Increment();
if (!input->IsHeapNumber()) {
DCHECK(input->IsSmi());
return *input;
}
Handle<HeapNumber> number = Handle<HeapNumber>::cast(input);
double value = number->value();
int exponent = number->get_exponent();
int sign = number->get_sign();
if (exponent < -1) {
// Number in range ]-0.5..0.5[. These always round to +/-zero.
if (sign) return isolate->heap()->minus_zero_value();
return Smi::FromInt(0);
}
// We compare with kSmiValueSize - 2 because (2^30 - 0.1) has exponent 29 and
// should be rounded to 2^30, which is not smi (for 31-bit smis, similar
// argument holds for 32-bit smis).
if (!sign && exponent < kSmiValueSize - 2) {
return Smi::FromInt(static_cast<int>(value + 0.5));
}
// If the magnitude is big enough, there's no place for fraction part. If we
// try to add 0.5 to this number, 1.0 will be added instead.
if (exponent >= 52) {
return *number;
}
if (sign && value >= -0.5) return isolate->heap()->minus_zero_value();
// Do not call NumberFromDouble() to avoid extra checks.
return *isolate->factory()->NewNumber(Floor(value + 0.5));
}
RUNTIME_FUNCTION(Runtime_MathSqrtRT) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
isolate->counters()->math_sqrt()->Increment();
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
return *isolate->factory()->NewNumber(fast_sqrt(x));
}
RUNTIME_FUNCTION(Runtime_MathFround) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
float xf = DoubleToFloat32(x);
return *isolate->factory()->NewNumber(xf);
}
RUNTIME_FUNCTION(Runtime_DateMakeDay) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_SMI_ARG_CHECKED(year, 0);
CONVERT_SMI_ARG_CHECKED(month, 1);
int days = isolate->date_cache()->DaysFromYearMonth(year, month);
RUNTIME_ASSERT(Smi::IsValid(days));
return Smi::FromInt(days);
}
RUNTIME_FUNCTION(Runtime_DateSetValue) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSDate, date, 0);
CONVERT_DOUBLE_ARG_CHECKED(time, 1);
CONVERT_SMI_ARG_CHECKED(is_utc, 2);
DateCache* date_cache = isolate->date_cache();
Handle<Object> value;;
bool is_value_nan = false;
if (std::isnan(time)) {
value = isolate->factory()->nan_value();
is_value_nan = true;
} else if (!is_utc &&
(time < -DateCache::kMaxTimeBeforeUTCInMs ||
time > DateCache::kMaxTimeBeforeUTCInMs)) {
value = isolate->factory()->nan_value();
is_value_nan = true;
} else {
time = is_utc ? time : date_cache->ToUTC(static_cast<int64_t>(time));
if (time < -DateCache::kMaxTimeInMs ||
time > DateCache::kMaxTimeInMs) {
value = isolate->factory()->nan_value();
is_value_nan = true;
} else {
value = isolate->factory()->NewNumber(DoubleToInteger(time));
}
}
date->SetValue(*value, is_value_nan);
return *value;
}
static Handle<JSObject> NewSloppyArguments(Isolate* isolate,
Handle<JSFunction> callee,
Object** parameters,
int argument_count) {
Handle<JSObject> result =
isolate->factory()->NewArgumentsObject(callee, argument_count);
// Allocate the elements if needed.
int parameter_count = callee->shared()->formal_parameter_count();
if (argument_count > 0) {
if (parameter_count > 0) {
int mapped_count = Min(argument_count, parameter_count);
Handle<FixedArray> parameter_map =
isolate->factory()->NewFixedArray(mapped_count + 2, NOT_TENURED);
parameter_map->set_map(
isolate->heap()->sloppy_arguments_elements_map());
Handle<Map> map = Map::Copy(handle(result->map()));
map->set_elements_kind(SLOPPY_ARGUMENTS_ELEMENTS);
result->set_map(*map);
result->set_elements(*parameter_map);
// Store the context and the arguments array at the beginning of the
// parameter map.
Handle<Context> context(isolate->context());
Handle<FixedArray> arguments =
isolate->factory()->NewFixedArray(argument_count, NOT_TENURED);
parameter_map->set(0, *context);
parameter_map->set(1, *arguments);
// Loop over the actual parameters backwards.
int index = argument_count - 1;
while (index >= mapped_count) {
// These go directly in the arguments array and have no
// corresponding slot in the parameter map.
arguments->set(index, *(parameters - index - 1));
--index;
}
Handle<ScopeInfo> scope_info(callee->shared()->scope_info());
while (index >= 0) {
// Detect duplicate names to the right in the parameter list.
Handle<String> name(scope_info->ParameterName(index));
int context_local_count = scope_info->ContextLocalCount();
bool duplicate = false;
for (int j = index + 1; j < parameter_count; ++j) {
if (scope_info->ParameterName(j) == *name) {
duplicate = true;
break;
}
}
if (duplicate) {
// This goes directly in the arguments array with a hole in the
// parameter map.
arguments->set(index, *(parameters - index - 1));
parameter_map->set_the_hole(index + 2);
} else {
// The context index goes in the parameter map with a hole in the
// arguments array.
int context_index = -1;
for (int j = 0; j < context_local_count; ++j) {
if (scope_info->ContextLocalName(j) == *name) {
context_index = j;
break;
}
}
DCHECK(context_index >= 0);
arguments->set_the_hole(index);
parameter_map->set(index + 2, Smi::FromInt(
Context::MIN_CONTEXT_SLOTS + context_index));
}
--index;
}
} else {
// If there is no aliasing, the arguments object elements are not
// special in any way.
Handle<FixedArray> elements =
isolate->factory()->NewFixedArray(argument_count, NOT_TENURED);
result->set_elements(*elements);
for (int i = 0; i < argument_count; ++i) {
elements->set(i, *(parameters - i - 1));
}
}
}
return result;
}
static Handle<JSObject> NewStrictArguments(Isolate* isolate,
Handle<JSFunction> callee,
Object** parameters,
int argument_count) {
Handle<JSObject> result =
isolate->factory()->NewArgumentsObject(callee, argument_count);
if (argument_count > 0) {
Handle<FixedArray> array =
isolate->factory()->NewUninitializedFixedArray(argument_count);
DisallowHeapAllocation no_gc;
WriteBarrierMode mode = array->GetWriteBarrierMode(no_gc);
for (int i = 0; i < argument_count; i++) {
array->set(i, *--parameters, mode);
}
result->set_elements(*array);
}
return result;
}
RUNTIME_FUNCTION(Runtime_NewArguments) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, callee, 0);
JavaScriptFrameIterator it(isolate);
// Find the frame that holds the actual arguments passed to the function.
it.AdvanceToArgumentsFrame();
JavaScriptFrame* frame = it.frame();
// Determine parameter location on the stack and dispatch on language mode.
int argument_count = frame->GetArgumentsLength();
Object** parameters = reinterpret_cast<Object**>(frame->GetParameterSlot(-1));
return callee->shared()->strict_mode() == STRICT
? *NewStrictArguments(isolate, callee, parameters, argument_count)
: *NewSloppyArguments(isolate, callee, parameters, argument_count);
}
RUNTIME_FUNCTION(Runtime_NewSloppyArguments) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, callee, 0);
Object** parameters = reinterpret_cast<Object**>(args[1]);
CONVERT_SMI_ARG_CHECKED(argument_count, 2);
return *NewSloppyArguments(isolate, callee, parameters, argument_count);
}
RUNTIME_FUNCTION(Runtime_NewStrictArguments) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, callee, 0)
Object** parameters = reinterpret_cast<Object**>(args[1]);
CONVERT_SMI_ARG_CHECKED(argument_count, 2);
return *NewStrictArguments(isolate, callee, parameters, argument_count);
}
RUNTIME_FUNCTION(Runtime_NewClosureFromStubFailure) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0);
Handle<Context> context(isolate->context());
PretenureFlag pretenure_flag = NOT_TENURED;
return *isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context,
pretenure_flag);
}
RUNTIME_FUNCTION(Runtime_NewClosure) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(Context, context, 0);
CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 1);
CONVERT_BOOLEAN_ARG_CHECKED(pretenure, 2);
// The caller ensures that we pretenure closures that are assigned
// directly to properties.
PretenureFlag pretenure_flag = pretenure ? TENURED : NOT_TENURED;
return *isolate->factory()->NewFunctionFromSharedFunctionInfo(
shared, context, pretenure_flag);
}
// Find the arguments of the JavaScript function invocation that called
// into C++ code. Collect these in a newly allocated array of handles (possibly
// prefixed by a number of empty handles).
static SmartArrayPointer<Handle<Object> > GetCallerArguments(
Isolate* isolate,
int prefix_argc,
int* total_argc) {
// Find frame containing arguments passed to the caller.
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
List<JSFunction*> functions(2);
frame->GetFunctions(&functions);
if (functions.length() > 1) {
int inlined_jsframe_index = functions.length() - 1;
JSFunction* inlined_function = functions[inlined_jsframe_index];
SlotRefValueBuilder slot_refs(
frame,
inlined_jsframe_index,
inlined_function->shared()->formal_parameter_count());
int args_count = slot_refs.args_length();
*total_argc = prefix_argc + args_count;
SmartArrayPointer<Handle<Object> > param_data(
NewArray<Handle<Object> >(*total_argc));
slot_refs.Prepare(isolate);
for (int i = 0; i < args_count; i++) {
Handle<Object> val = slot_refs.GetNext(isolate, 0);
param_data[prefix_argc + i] = val;
}
slot_refs.Finish(isolate);
return param_data;
} else {
it.AdvanceToArgumentsFrame();
frame = it.frame();
int args_count = frame->ComputeParametersCount();
*total_argc = prefix_argc + args_count;
SmartArrayPointer<Handle<Object> > param_data(
NewArray<Handle<Object> >(*total_argc));
for (int i = 0; i < args_count; i++) {
Handle<Object> val = Handle<Object>(frame->GetParameter(i), isolate);
param_data[prefix_argc + i] = val;
}
return param_data;
}
}
RUNTIME_FUNCTION(Runtime_FunctionBindArguments) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, bound_function, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, bindee, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, this_object, 2);
CONVERT_NUMBER_ARG_HANDLE_CHECKED(new_length, 3);
// TODO(lrn): Create bound function in C++ code from premade shared info.
bound_function->shared()->set_bound(true);
// Get all arguments of calling function (Function.prototype.bind).
int argc = 0;
SmartArrayPointer<Handle<Object> > arguments =
GetCallerArguments(isolate, 0, &argc);
// Don't count the this-arg.
if (argc > 0) {
RUNTIME_ASSERT(arguments[0].is_identical_to(this_object));
argc--;
} else {
RUNTIME_ASSERT(this_object->IsUndefined());
}
// Initialize array of bindings (function, this, and any existing arguments
// if the function was already bound).
Handle<FixedArray> new_bindings;
int i;
if (bindee->IsJSFunction() && JSFunction::cast(*bindee)->shared()->bound()) {
Handle<FixedArray> old_bindings(
JSFunction::cast(*bindee)->function_bindings());
RUNTIME_ASSERT(old_bindings->length() > JSFunction::kBoundFunctionIndex);
new_bindings =
isolate->factory()->NewFixedArray(old_bindings->length() + argc);
bindee = Handle<Object>(old_bindings->get(JSFunction::kBoundFunctionIndex),
isolate);
i = 0;
for (int n = old_bindings->length(); i < n; i++) {
new_bindings->set(i, old_bindings->get(i));
}
} else {
int array_size = JSFunction::kBoundArgumentsStartIndex + argc;
new_bindings = isolate->factory()->NewFixedArray(array_size);
new_bindings->set(JSFunction::kBoundFunctionIndex, *bindee);
new_bindings->set(JSFunction::kBoundThisIndex, *this_object);
i = 2;
}
// Copy arguments, skipping the first which is "this_arg".
for (int j = 0; j < argc; j++, i++) {
new_bindings->set(i, *arguments[j + 1]);
}
new_bindings->set_map_no_write_barrier(
isolate->heap()->fixed_cow_array_map());
bound_function->set_function_bindings(*new_bindings);
// Update length. Have to remove the prototype first so that map migration
// is happy about the number of fields.
RUNTIME_ASSERT(bound_function->RemovePrototype());
Handle<Map> bound_function_map(
isolate->native_context()->bound_function_map());
JSObject::MigrateToMap(bound_function, bound_function_map);
Handle<String> length_string = isolate->factory()->length_string();
PropertyAttributes attr =
static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM | READ_ONLY);
RETURN_FAILURE_ON_EXCEPTION(
isolate,
JSObject::SetOwnPropertyIgnoreAttributes(
bound_function, length_string, new_length, attr));
return *bound_function;
}
RUNTIME_FUNCTION(Runtime_BoundFunctionGetBindings) {
HandleScope handles(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, callable, 0);
if (callable->IsJSFunction()) {
Handle<JSFunction> function = Handle<JSFunction>::cast(callable);
if (function->shared()->bound()) {
Handle<FixedArray> bindings(function->function_bindings());
RUNTIME_ASSERT(bindings->map() == isolate->heap()->fixed_cow_array_map());
return *isolate->factory()->NewJSArrayWithElements(bindings);
}
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_NewObjectFromBound) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
// First argument is a function to use as a constructor.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
RUNTIME_ASSERT(function->shared()->bound());
// The argument is a bound function. Extract its bound arguments
// and callable.
Handle<FixedArray> bound_args =
Handle<FixedArray>(FixedArray::cast(function->function_bindings()));
int bound_argc = bound_args->length() - JSFunction::kBoundArgumentsStartIndex;
Handle<Object> bound_function(
JSReceiver::cast(bound_args->get(JSFunction::kBoundFunctionIndex)),
isolate);
DCHECK(!bound_function->IsJSFunction() ||
!Handle<JSFunction>::cast(bound_function)->shared()->bound());
int total_argc = 0;
SmartArrayPointer<Handle<Object> > param_data =
GetCallerArguments(isolate, bound_argc, &total_argc);
for (int i = 0; i < bound_argc; i++) {
param_data[i] = Handle<Object>(bound_args->get(
JSFunction::kBoundArgumentsStartIndex + i), isolate);
}
if (!bound_function->IsJSFunction()) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, bound_function,
Execution::TryGetConstructorDelegate(isolate, bound_function));
}
DCHECK(bound_function->IsJSFunction());
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Execution::New(Handle<JSFunction>::cast(bound_function),
total_argc, param_data.get()));
return *result;
}
static Object* Runtime_NewObjectHelper(Isolate* isolate,
Handle<Object> constructor,
Handle<AllocationSite> site) {
// If the constructor isn't a proper function we throw a type error.
if (!constructor->IsJSFunction()) {
Vector< Handle<Object> > arguments = HandleVector(&constructor, 1);
THROW_NEW_ERROR_RETURN_FAILURE(isolate,
NewTypeError("not_constructor", arguments));
}
Handle<JSFunction> function = Handle<JSFunction>::cast(constructor);
// If function should not have prototype, construction is not allowed. In this
// case generated code bailouts here, since function has no initial_map.
if (!function->should_have_prototype() && !function->shared()->bound()) {
Vector< Handle<Object> > arguments = HandleVector(&constructor, 1);
THROW_NEW_ERROR_RETURN_FAILURE(isolate,
NewTypeError("not_constructor", arguments));
}
Debug* debug = isolate->debug();
// Handle stepping into constructors if step into is active.
if (debug->StepInActive()) {
debug->HandleStepIn(function, Handle<Object>::null(), 0, true);
}
if (function->has_initial_map()) {
if (function->initial_map()->instance_type() == JS_FUNCTION_TYPE) {
// The 'Function' function ignores the receiver object when
// called using 'new' and creates a new JSFunction object that
// is returned. The receiver object is only used for error
// reporting if an error occurs when constructing the new
// JSFunction. Factory::NewJSObject() should not be used to
// allocate JSFunctions since it does not properly initialize
// the shared part of the function. Since the receiver is
// ignored anyway, we use the global object as the receiver
// instead of a new JSFunction object. This way, errors are
// reported the same way whether or not 'Function' is called
// using 'new'.
return isolate->global_proxy();
}
}
// The function should be compiled for the optimization hints to be
// available.
Compiler::EnsureCompiled(function, CLEAR_EXCEPTION);
Handle<JSObject> result;
if (site.is_null()) {
result = isolate->factory()->NewJSObject(function);
} else {
result = isolate->factory()->NewJSObjectWithMemento(function, site);
}
isolate->counters()->constructed_objects()->Increment();
isolate->counters()->constructed_objects_runtime()->Increment();
return *result;
}
RUNTIME_FUNCTION(Runtime_NewObject) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, constructor, 0);
return Runtime_NewObjectHelper(isolate,
constructor,
Handle<AllocationSite>::null());
}
RUNTIME_FUNCTION(Runtime_NewObjectWithAllocationSite) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, constructor, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, feedback, 0);
Handle<AllocationSite> site;
if (feedback->IsAllocationSite()) {
// The feedback can be an AllocationSite or undefined.
site = Handle<AllocationSite>::cast(feedback);
}
return Runtime_NewObjectHelper(isolate, constructor, site);
}
RUNTIME_FUNCTION(Runtime_FinalizeInstanceSize) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
function->CompleteInobjectSlackTracking();
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_CompileLazy) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
#ifdef DEBUG
if (FLAG_trace_lazy && !function->shared()->is_compiled()) {
PrintF("[unoptimized: ");
function->PrintName();
PrintF("]\n");
}
#endif
// Compile the target function.
DCHECK(function->shared()->allows_lazy_compilation());
Handle<Code> code;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, code,
Compiler::GetLazyCode(function));
DCHECK(code->kind() == Code::FUNCTION ||
code->kind() == Code::OPTIMIZED_FUNCTION);
function->ReplaceCode(*code);
return *code;
}
RUNTIME_FUNCTION(Runtime_CompileOptimized) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
CONVERT_BOOLEAN_ARG_CHECKED(concurrent, 1);
Handle<Code> unoptimized(function->shared()->code());
if (!isolate->use_crankshaft() ||
function->shared()->optimization_disabled() ||
isolate->DebuggerHasBreakPoints()) {
// If the function is not optimizable or debugger is active continue
// using the code from the full compiler.
if (FLAG_trace_opt) {
PrintF("[failed to optimize ");
function->PrintName();
PrintF(": is code optimizable: %s, is debugger enabled: %s]\n",
function->shared()->optimization_disabled() ? "F" : "T",
isolate->DebuggerHasBreakPoints() ? "T" : "F");
}
function->ReplaceCode(*unoptimized);
return function->code();
}
Compiler::ConcurrencyMode mode =
concurrent ? Compiler::CONCURRENT : Compiler::NOT_CONCURRENT;
Handle<Code> code;
if (Compiler::GetOptimizedCode(function, unoptimized, mode).ToHandle(&code)) {
function->ReplaceCode(*code);
} else {
function->ReplaceCode(function->shared()->code());
}
DCHECK(function->code()->kind() == Code::FUNCTION ||
function->code()->kind() == Code::OPTIMIZED_FUNCTION ||
function->IsInOptimizationQueue());
return function->code();
}
class ActivationsFinder : public ThreadVisitor {
public:
Code* code_;
bool has_code_activations_;
explicit ActivationsFinder(Code* code)
: code_(code),
has_code_activations_(false) { }
void VisitThread(Isolate* isolate, ThreadLocalTop* top) {
JavaScriptFrameIterator it(isolate, top);
VisitFrames(&it);
}
void VisitFrames(JavaScriptFrameIterator* it) {
for (; !it->done(); it->Advance()) {
JavaScriptFrame* frame = it->frame();
if (code_->contains(frame->pc())) has_code_activations_ = true;
}
}
};
RUNTIME_FUNCTION(Runtime_NotifyStubFailure) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
Deoptimizer* deoptimizer = Deoptimizer::Grab(isolate);
DCHECK(AllowHeapAllocation::IsAllowed());
delete deoptimizer;
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_NotifyDeoptimized) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_SMI_ARG_CHECKED(type_arg, 0);
Deoptimizer::BailoutType type =
static_cast<Deoptimizer::BailoutType>(type_arg);
Deoptimizer* deoptimizer = Deoptimizer::Grab(isolate);
DCHECK(AllowHeapAllocation::IsAllowed());
Handle<JSFunction> function = deoptimizer->function();
Handle<Code> optimized_code = deoptimizer->compiled_code();
DCHECK(optimized_code->kind() == Code::OPTIMIZED_FUNCTION);
DCHECK(type == deoptimizer->bailout_type());
// Make sure to materialize objects before causing any allocation.
JavaScriptFrameIterator it(isolate);
deoptimizer->MaterializeHeapObjects(&it);
delete deoptimizer;
JavaScriptFrame* frame = it.frame();
RUNTIME_ASSERT(frame->function()->IsJSFunction());
DCHECK(frame->function() == *function);
// Avoid doing too much work when running with --always-opt and keep
// the optimized code around.
if (FLAG_always_opt || type == Deoptimizer::LAZY) {
return isolate->heap()->undefined_value();
}
// Search for other activations of the same function and code.
ActivationsFinder activations_finder(*optimized_code);
activations_finder.VisitFrames(&it);
isolate->thread_manager()->IterateArchivedThreads(&activations_finder);
if (!activations_finder.has_code_activations_) {
if (function->code() == *optimized_code) {
if (FLAG_trace_deopt) {
PrintF("[removing optimized code for: ");
function->PrintName();
PrintF("]\n");
}
function->ReplaceCode(function->shared()->code());
// Evict optimized code for this function from the cache so that it
// doesn't get used for new closures.
function->shared()->EvictFromOptimizedCodeMap(*optimized_code,
"notify deoptimized");
}
} else {
// TODO(titzer): we should probably do DeoptimizeCodeList(code)
// unconditionally if the code is not already marked for deoptimization.
// If there is an index by shared function info, all the better.
Deoptimizer::DeoptimizeFunction(*function);
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DeoptimizeFunction) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
if (!function->IsOptimized()) return isolate->heap()->undefined_value();
// TODO(turbofan): Deoptimization is not supported yet.
if (function->code()->is_turbofanned() && !FLAG_turbo_deoptimization) {
return isolate->heap()->undefined_value();
}
Deoptimizer::DeoptimizeFunction(*function);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_ClearFunctionTypeFeedback) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
function->shared()->ClearTypeFeedbackInfo();
Code* unoptimized = function->shared()->code();
if (unoptimized->kind() == Code::FUNCTION) {
unoptimized->ClearInlineCaches();
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_RunningInSimulator) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
#if defined(USE_SIMULATOR)
return isolate->heap()->true_value();
#else
return isolate->heap()->false_value();
#endif
}
RUNTIME_FUNCTION(Runtime_IsConcurrentRecompilationSupported) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
return isolate->heap()->ToBoolean(
isolate->concurrent_recompilation_enabled());
}
RUNTIME_FUNCTION(Runtime_OptimizeFunctionOnNextCall) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 1 || args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
// The following two assertions are lifted from the DCHECKs inside
// JSFunction::MarkForOptimization().
RUNTIME_ASSERT(!function->shared()->is_generator());
RUNTIME_ASSERT(function->shared()->allows_lazy_compilation() ||
(function->code()->kind() == Code::FUNCTION &&
function->code()->optimizable()));
// If the function is optimized, just return.
if (function->IsOptimized()) return isolate->heap()->undefined_value();
function->MarkForOptimization();
Code* unoptimized = function->shared()->code();
if (args.length() == 2 &&
unoptimized->kind() == Code::FUNCTION) {
CONVERT_ARG_HANDLE_CHECKED(String, type, 1);
if (type->IsOneByteEqualTo(STATIC_CHAR_VECTOR("osr")) && FLAG_use_osr) {
// Start patching from the currently patched loop nesting level.
DCHECK(BackEdgeTable::Verify(isolate, unoptimized));
isolate->runtime_profiler()->AttemptOnStackReplacement(
*function, Code::kMaxLoopNestingMarker);
} else if (type->IsOneByteEqualTo(STATIC_CHAR_VECTOR("concurrent")) &&
isolate->concurrent_recompilation_enabled()) {
function->MarkForConcurrentOptimization();
}
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_NeverOptimizeFunction) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, function, 0);
function->shared()->set_optimization_disabled(true);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetOptimizationStatus) {
HandleScope scope(isolate);
RUNTIME_ASSERT(args.length() == 1 || args.length() == 2);
if (!isolate->use_crankshaft()) {
return Smi::FromInt(4); // 4 == "never".
}
bool sync_with_compiler_thread = true;
if (args.length() == 2) {
CONVERT_ARG_HANDLE_CHECKED(String, sync, 1);
if (sync->IsOneByteEqualTo(STATIC_CHAR_VECTOR("no sync"))) {
sync_with_compiler_thread = false;
}
}
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
if (isolate->concurrent_recompilation_enabled() &&
sync_with_compiler_thread) {
while (function->IsInOptimizationQueue()) {
isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
base::OS::Sleep(50);
}
}
if (FLAG_always_opt) {
// We may have always opt, but that is more best-effort than a real
// promise, so we still say "no" if it is not optimized.
return function->IsOptimized() ? Smi::FromInt(3) // 3 == "always".
: Smi::FromInt(2); // 2 == "no".
}
if (FLAG_deopt_every_n_times) {
return Smi::FromInt(6); // 6 == "maybe deopted".
}
if (function->IsOptimized() && function->code()->is_turbofanned()) {
return Smi::FromInt(7); // 7 == "TurboFan compiler".
}
return function->IsOptimized() ? Smi::FromInt(1) // 1 == "yes".
: Smi::FromInt(2); // 2 == "no".
}
RUNTIME_FUNCTION(Runtime_UnblockConcurrentRecompilation) {
DCHECK(args.length() == 0);
RUNTIME_ASSERT(FLAG_block_concurrent_recompilation);
RUNTIME_ASSERT(isolate->concurrent_recompilation_enabled());
isolate->optimizing_compiler_thread()->Unblock();
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetOptimizationCount) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
return Smi::FromInt(function->shared()->opt_count());
}
static bool IsSuitableForOnStackReplacement(Isolate* isolate,
Handle<JSFunction> function,
Handle<Code> current_code) {
// Keep track of whether we've succeeded in optimizing.
if (!isolate->use_crankshaft() || !current_code->optimizable()) return false;
// If we are trying to do OSR when there are already optimized
// activations of the function, it means (a) the function is directly or
// indirectly recursive and (b) an optimized invocation has been
// deoptimized so that we are currently in an unoptimized activation.
// Check for optimized activations of this function.
for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) {
JavaScriptFrame* frame = it.frame();
if (frame->is_optimized() && frame->function() == *function) return false;
}
return true;
}
RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
Handle<Code> caller_code(function->shared()->code());
// We're not prepared to handle a function with arguments object.
DCHECK(!function->shared()->uses_arguments());
RUNTIME_ASSERT(FLAG_use_osr);
// Passing the PC in the javascript frame from the caller directly is
// not GC safe, so we walk the stack to get it.
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
if (!caller_code->contains(frame->pc())) {
// Code on the stack may not be the code object referenced by the shared
// function info. It may have been replaced to include deoptimization data.
caller_code = Handle<Code>(frame->LookupCode());
}
uint32_t pc_offset = static_cast<uint32_t>(
frame->pc() - caller_code->instruction_start());
#ifdef DEBUG
DCHECK_EQ(frame->function(), *function);
DCHECK_EQ(frame->LookupCode(), *caller_code);
DCHECK(caller_code->contains(frame->pc()));
#endif // DEBUG
BailoutId ast_id = caller_code->TranslatePcOffsetToAstId(pc_offset);
DCHECK(!ast_id.IsNone());
Compiler::ConcurrencyMode mode =
isolate->concurrent_osr_enabled() &&
(function->shared()->ast_node_count() > 512) ? Compiler::CONCURRENT
: Compiler::NOT_CONCURRENT;
Handle<Code> result = Handle<Code>::null();
OptimizedCompileJob* job = NULL;
if (mode == Compiler::CONCURRENT) {
// Gate the OSR entry with a stack check.
BackEdgeTable::AddStackCheck(caller_code, pc_offset);
// Poll already queued compilation jobs.
OptimizingCompilerThread* thread = isolate->optimizing_compiler_thread();
if (thread->IsQueuedForOSR(function, ast_id)) {
if (FLAG_trace_osr) {
PrintF("[OSR - Still waiting for queued: ");
function->PrintName();
PrintF(" at AST id %d]\n", ast_id.ToInt());
}
return NULL;
}
job = thread->FindReadyOSRCandidate(function, ast_id);
}
if (job != NULL) {
if (FLAG_trace_osr) {
PrintF("[OSR - Found ready: ");
function->PrintName();
PrintF(" at AST id %d]\n", ast_id.ToInt());
}
result = Compiler::GetConcurrentlyOptimizedCode(job);
} else if (IsSuitableForOnStackReplacement(isolate, function, caller_code)) {
if (FLAG_trace_osr) {
PrintF("[OSR - Compiling: ");
function->PrintName();
PrintF(" at AST id %d]\n", ast_id.ToInt());
}
MaybeHandle<Code> maybe_result = Compiler::GetOptimizedCode(
function, caller_code, mode, ast_id);
if (maybe_result.ToHandle(&result) &&
result.is_identical_to(isolate->builtins()->InOptimizationQueue())) {
// Optimization is queued. Return to check later.
return NULL;
}
}
// Revert the patched back edge table, regardless of whether OSR succeeds.
BackEdgeTable::Revert(isolate, *caller_code);
// Check whether we ended up with usable optimized code.
if (!result.is_null() && result->kind() == Code::OPTIMIZED_FUNCTION) {
DeoptimizationInputData* data =
DeoptimizationInputData::cast(result->deoptimization_data());
if (data->OsrPcOffset()->value() >= 0) {
DCHECK(BailoutId(data->OsrAstId()->value()) == ast_id);
if (FLAG_trace_osr) {
PrintF("[OSR - Entry at AST id %d, offset %d in optimized code]\n",
ast_id.ToInt(), data->OsrPcOffset()->value());
}
// TODO(titzer): this is a massive hack to make the deopt counts
// match. Fix heuristics for reenabling optimizations!
function->shared()->increment_deopt_count();
// TODO(titzer): Do not install code into the function.
function->ReplaceCode(*result);
return *result;
}
}
// Failed.
if (FLAG_trace_osr) {
PrintF("[OSR - Failed: ");
function->PrintName();
PrintF(" at AST id %d]\n", ast_id.ToInt());
}
if (!function->IsOptimized()) {
function->ReplaceCode(function->shared()->code());
}
return NULL;
}
RUNTIME_FUNCTION(Runtime_SetAllocationTimeout) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2 || args.length() == 3);
#ifdef DEBUG
CONVERT_SMI_ARG_CHECKED(interval, 0);
CONVERT_SMI_ARG_CHECKED(timeout, 1);
isolate->heap()->set_allocation_timeout(timeout);
FLAG_gc_interval = interval;
if (args.length() == 3) {
// Enable/disable inline allocation if requested.
CONVERT_BOOLEAN_ARG_CHECKED(inline_allocation, 2);
if (inline_allocation) {
isolate->heap()->EnableInlineAllocation();
} else {
isolate->heap()->DisableInlineAllocation();
}
}
#endif
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_CheckIsBootstrapping) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
RUNTIME_ASSERT(isolate->bootstrapper()->IsActive());
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetRootNaN) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
RUNTIME_ASSERT(isolate->bootstrapper()->IsActive());
return isolate->heap()->nan_value();
}
RUNTIME_FUNCTION(Runtime_Call) {
HandleScope scope(isolate);
DCHECK(args.length() >= 2);
int argc = args.length() - 2;
CONVERT_ARG_CHECKED(JSReceiver, fun, argc + 1);
Object* receiver = args[0];
// If there are too many arguments, allocate argv via malloc.
const int argv_small_size = 10;
Handle<Object> argv_small_buffer[argv_small_size];
SmartArrayPointer<Handle<Object> > argv_large_buffer;
Handle<Object>* argv = argv_small_buffer;
if (argc > argv_small_size) {
argv = new Handle<Object>[argc];
if (argv == NULL) return isolate->StackOverflow();
argv_large_buffer = SmartArrayPointer<Handle<Object> >(argv);
}
for (int i = 0; i < argc; ++i) {
argv[i] = Handle<Object>(args[1 + i], isolate);
}
Handle<JSReceiver> hfun(fun);
Handle<Object> hreceiver(receiver, isolate);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, hfun, hreceiver, argc, argv, true));
return *result;
}
RUNTIME_FUNCTION(Runtime_Apply) {
HandleScope scope(isolate);
DCHECK(args.length() == 5);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, fun, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, arguments, 2);
CONVERT_INT32_ARG_CHECKED(offset, 3);
CONVERT_INT32_ARG_CHECKED(argc, 4);
RUNTIME_ASSERT(offset >= 0);
// Loose upper bound to allow fuzzing. We'll most likely run out of
// stack space before hitting this limit.
static int kMaxArgc = 1000000;
RUNTIME_ASSERT(argc >= 0 && argc <= kMaxArgc);
// If there are too many arguments, allocate argv via malloc.
const int argv_small_size = 10;
Handle<Object> argv_small_buffer[argv_small_size];
SmartArrayPointer<Handle<Object> > argv_large_buffer;
Handle<Object>* argv = argv_small_buffer;
if (argc > argv_small_size) {
argv = new Handle<Object>[argc];
if (argv == NULL) return isolate->StackOverflow();
argv_large_buffer = SmartArrayPointer<Handle<Object> >(argv);
}
for (int i = 0; i < argc; ++i) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, argv[i],
Object::GetElement(isolate, arguments, offset + i));
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, fun, receiver, argc, argv, true));
return *result;
}
RUNTIME_FUNCTION(Runtime_GetFunctionDelegate) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
RUNTIME_ASSERT(!object->IsJSFunction());
return *Execution::GetFunctionDelegate(isolate, object);
}
RUNTIME_FUNCTION(Runtime_GetConstructorDelegate) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
RUNTIME_ASSERT(!object->IsJSFunction());
return *Execution::GetConstructorDelegate(isolate, object);
}
RUNTIME_FUNCTION(Runtime_NewGlobalContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
CONVERT_ARG_HANDLE_CHECKED(ScopeInfo, scope_info, 1);
Handle<Context> result =
isolate->factory()->NewGlobalContext(function, scope_info);
DCHECK(function->context() == isolate->context());
DCHECK(function->context()->global_object() == result->global_object());
result->global_object()->set_global_context(*result);
return *result;
}
RUNTIME_FUNCTION(Runtime_NewFunctionContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
DCHECK(function->context() == isolate->context());
int length = function->shared()->scope_info()->ContextLength();
return *isolate->factory()->NewFunctionContext(length, function);
}
RUNTIME_FUNCTION(Runtime_PushWithContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
Handle<JSReceiver> extension_object;
if (args[0]->IsJSReceiver()) {
extension_object = args.at<JSReceiver>(0);
} else {
// Try to convert the object to a proper JavaScript object.
MaybeHandle<JSReceiver> maybe_object =
Object::ToObject(isolate, args.at<Object>(0));
if (!maybe_object.ToHandle(&extension_object)) {
Handle<Object> handle = args.at<Object>(0);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError("with_expression", HandleVector(&handle, 1)));
}
}
Handle<JSFunction> function;
if (args[1]->IsSmi()) {
// A smi sentinel indicates a context nested inside global code rather
// than some function. There is a canonical empty function that can be
// gotten from the native context.
function = handle(isolate->native_context()->closure());
} else {
function = args.at<JSFunction>(1);
}
Handle<Context> current(isolate->context());
Handle<Context> context = isolate->factory()->NewWithContext(
function, current, extension_object);
isolate->set_context(*context);
return *context;
}
RUNTIME_FUNCTION(Runtime_PushCatchContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, name, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, thrown_object, 1);
Handle<JSFunction> function;
if (args[2]->IsSmi()) {
// A smi sentinel indicates a context nested inside global code rather
// than some function. There is a canonical empty function that can be
// gotten from the native context.
function = handle(isolate->native_context()->closure());
} else {
function = args.at<JSFunction>(2);
}
Handle<Context> current(isolate->context());
Handle<Context> context = isolate->factory()->NewCatchContext(
function, current, name, thrown_object);
isolate->set_context(*context);
return *context;
}
RUNTIME_FUNCTION(Runtime_PushBlockContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(ScopeInfo, scope_info, 0);
Handle<JSFunction> function;
if (args[1]->IsSmi()) {
// A smi sentinel indicates a context nested inside global code rather
// than some function. There is a canonical empty function that can be
// gotten from the native context.
function = handle(isolate->native_context()->closure());
} else {
function = args.at<JSFunction>(1);
}
Handle<Context> current(isolate->context());
Handle<Context> context = isolate->factory()->NewBlockContext(
function, current, scope_info);
isolate->set_context(*context);
return *context;
}
RUNTIME_FUNCTION(Runtime_IsJSModule) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSModule());
}
RUNTIME_FUNCTION(Runtime_PushModuleContext) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_SMI_ARG_CHECKED(index, 0);
if (!args[1]->IsScopeInfo()) {
// Module already initialized. Find hosting context and retrieve context.
Context* host = Context::cast(isolate->context())->global_context();
Context* context = Context::cast(host->get(index));
DCHECK(context->previous() == isolate->context());
isolate->set_context(context);
return context;
}
CONVERT_ARG_HANDLE_CHECKED(ScopeInfo, scope_info, 1);
// Allocate module context.
HandleScope scope(isolate);
Factory* factory = isolate->factory();
Handle<Context> context = factory->NewModuleContext(scope_info);
Handle<JSModule> module = factory->NewJSModule(context, scope_info);
context->set_module(*module);
Context* previous = isolate->context();
context->set_previous(previous);
context->set_closure(previous->closure());
context->set_global_object(previous->global_object());
isolate->set_context(*context);
// Find hosting scope and initialize internal variable holding module there.
previous->global_context()->set(index, *context);
return *context;
}
RUNTIME_FUNCTION(Runtime_DeclareModules) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, descriptions, 0);
Context* host_context = isolate->context();
for (int i = 0; i < descriptions->length(); ++i) {
Handle<ModuleInfo> description(ModuleInfo::cast(descriptions->get(i)));
int host_index = description->host_index();
Handle<Context> context(Context::cast(host_context->get(host_index)));
Handle<JSModule> module(context->module());
for (int j = 0; j < description->length(); ++j) {
Handle<String> name(description->name(j));
VariableMode mode = description->mode(j);
int index = description->index(j);
switch (mode) {
case VAR:
case LET:
case CONST:
case CONST_LEGACY: {
PropertyAttributes attr =
IsImmutableVariableMode(mode) ? FROZEN : SEALED;
Handle<AccessorInfo> info =
Accessors::MakeModuleExport(name, index, attr);
Handle<Object> result =
JSObject::SetAccessor(module, info).ToHandleChecked();
DCHECK(!result->IsUndefined());
USE(result);
break;
}
case MODULE: {
Object* referenced_context = Context::cast(host_context)->get(index);
Handle<JSModule> value(Context::cast(referenced_context)->module());
JSObject::SetOwnPropertyIgnoreAttributes(module, name, value, FROZEN)
.Assert();
break;
}
case INTERNAL:
case TEMPORARY:
case DYNAMIC:
case DYNAMIC_GLOBAL:
case DYNAMIC_LOCAL:
UNREACHABLE();
}
}
JSObject::PreventExtensions(module).Assert();
}
DCHECK(!isolate->has_pending_exception());
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DeleteLookupSlot) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Context, context, 0);
CONVERT_ARG_HANDLE_CHECKED(String, name, 1);
int index;
PropertyAttributes attributes;
ContextLookupFlags flags = FOLLOW_CHAINS;
BindingFlags binding_flags;
Handle<Object> holder = context->Lookup(name,
flags,
&index,
&attributes,
&binding_flags);
// If the slot was not found the result is true.
if (holder.is_null()) {
return isolate->heap()->true_value();
}
// If the slot was found in a context, it should be DONT_DELETE.
if (holder->IsContext()) {
return isolate->heap()->false_value();
}
// The slot was found in a JSObject, either a context extension object,
// the global object, or the subject of a with. Try to delete it
// (respecting DONT_DELETE).
Handle<JSObject> object = Handle<JSObject>::cast(holder);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSReceiver::DeleteProperty(object, name));
return *result;
}
// A mechanism to return a pair of Object pointers in registers (if possible).
// How this is achieved is calling convention-dependent.
// All currently supported x86 compiles uses calling conventions that are cdecl
// variants where a 64-bit value is returned in two 32-bit registers
// (edx:eax on ia32, r1:r0 on ARM).
// In AMD-64 calling convention a struct of two pointers is returned in rdx:rax.
// In Win64 calling convention, a struct of two pointers is returned in memory,
// allocated by the caller, and passed as a pointer in a hidden first parameter.
#ifdef V8_HOST_ARCH_64_BIT
struct ObjectPair {
Object* x;
Object* y;
};
static inline ObjectPair MakePair(Object* x, Object* y) {
ObjectPair result = {x, y};
// Pointers x and y returned in rax and rdx, in AMD-x64-abi.
// In Win64 they are assigned to a hidden first argument.
return result;
}
#elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT
// For x32 a 128-bit struct return is done as rax and rdx from the ObjectPair
// are used in the full codegen and Crankshaft compiler. An alternative is
// using uint64_t and modifying full codegen and Crankshaft compiler.
struct ObjectPair {
Object* x;
uint32_t x_upper;
Object* y;
uint32_t y_upper;
};
static inline ObjectPair MakePair(Object* x, Object* y) {
ObjectPair result = {x, 0, y, 0};
// Pointers x and y returned in rax and rdx, in x32-abi.
return result;
}
#else
typedef uint64_t ObjectPair;
static inline ObjectPair MakePair(Object* x, Object* y) {
#if defined(V8_TARGET_LITTLE_ENDIAN)
return reinterpret_cast<uint32_t>(x) |
(reinterpret_cast<ObjectPair>(y) << 32);
#elif defined(V8_TARGET_BIG_ENDIAN)
return reinterpret_cast<uint32_t>(y) |
(reinterpret_cast<ObjectPair>(x) << 32);
#else
#error Unknown endianness
#endif
}
#endif
static Object* ComputeReceiverForNonGlobal(Isolate* isolate,
JSObject* holder) {
DCHECK(!holder->IsGlobalObject());
Context* top = isolate->context();
// Get the context extension function.
JSFunction* context_extension_function =
top->native_context()->context_extension_function();
// If the holder isn't a context extension object, we just return it
// as the receiver. This allows arguments objects to be used as
// receivers, but only if they are put in the context scope chain
// explicitly via a with-statement.
Object* constructor = holder->map()->constructor();
if (constructor != context_extension_function) return holder;
// Fall back to using the global object as the implicit receiver if
// the property turns out to be a local variable allocated in a
// context extension object - introduced via eval.
return isolate->heap()->undefined_value();
}
static ObjectPair LoadLookupSlotHelper(Arguments args, Isolate* isolate,
bool throw_error) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
if (!args[0]->IsContext() || !args[1]->IsString()) {
return MakePair(isolate->ThrowIllegalOperation(), NULL);
}
Handle<Context> context = args.at<Context>(0);
Handle<String> name = args.at<String>(1);
int index;
PropertyAttributes attributes;
ContextLookupFlags flags = FOLLOW_CHAINS;
BindingFlags binding_flags;
Handle<Object> holder = context->Lookup(name,
flags,
&index,
&attributes,
&binding_flags);
if (isolate->has_pending_exception()) {
return MakePair(isolate->heap()->exception(), NULL);
}
// If the index is non-negative, the slot has been found in a context.
if (index >= 0) {
DCHECK(holder->IsContext());
// If the "property" we were looking for is a local variable, the
// receiver is the global object; see ECMA-262, 3rd., 10.1.6 and 10.2.3.
Handle<Object> receiver = isolate->factory()->undefined_value();
Object* value = Context::cast(*holder)->get(index);
// Check for uninitialized bindings.
switch (binding_flags) {
case MUTABLE_CHECK_INITIALIZED:
case IMMUTABLE_CHECK_INITIALIZED_HARMONY:
if (value->IsTheHole()) {
Handle<Object> error;
MaybeHandle<Object> maybe_error =
isolate->factory()->NewReferenceError("not_defined",
HandleVector(&name, 1));
if (maybe_error.ToHandle(&error)) isolate->Throw(*error);
return MakePair(isolate->heap()->exception(), NULL);
}
// FALLTHROUGH
case MUTABLE_IS_INITIALIZED:
case IMMUTABLE_IS_INITIALIZED:
case IMMUTABLE_IS_INITIALIZED_HARMONY:
DCHECK(!value->IsTheHole());
return MakePair(value, *receiver);
case IMMUTABLE_CHECK_INITIALIZED:
if (value->IsTheHole()) {
DCHECK((attributes & READ_ONLY) != 0);
value = isolate->heap()->undefined_value();
}
return MakePair(value, *receiver);
case MISSING_BINDING:
UNREACHABLE();
return MakePair(NULL, NULL);
}
}
// Otherwise, if the slot was found the holder is a context extension
// object, subject of a with, or a global object. We read the named
// property from it.
if (!holder.is_null()) {
Handle<JSReceiver> object = Handle<JSReceiver>::cast(holder);
#ifdef DEBUG
if (!object->IsJSProxy()) {
Maybe<bool> maybe = JSReceiver::HasProperty(object, name);
DCHECK(maybe.has_value);
DCHECK(maybe.value);
}
#endif
// GetProperty below can cause GC.
Handle<Object> receiver_handle(
object->IsGlobalObject()
? Object::cast(isolate->heap()->undefined_value())
: object->IsJSProxy() ? static_cast<Object*>(*object)
: ComputeReceiverForNonGlobal(isolate, JSObject::cast(*object)),
isolate);
// No need to unhole the value here. This is taken care of by the
// GetProperty function.
Handle<Object> value;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, value,
Object::GetProperty(object, name),
MakePair(isolate->heap()->exception(), NULL));
return MakePair(*value, *receiver_handle);
}
if (throw_error) {
// The property doesn't exist - throw exception.
Handle<Object> error;
MaybeHandle<Object> maybe_error = isolate->factory()->NewReferenceError(
"not_defined", HandleVector(&name, 1));
if (maybe_error.ToHandle(&error)) isolate->Throw(*error);
return MakePair(isolate->heap()->exception(), NULL);
} else {
// The property doesn't exist - return undefined.
return MakePair(isolate->heap()->undefined_value(),
isolate->heap()->undefined_value());
}
}
RUNTIME_FUNCTION_RETURN_PAIR(Runtime_LoadLookupSlot) {
return LoadLookupSlotHelper(args, isolate, true);
}
RUNTIME_FUNCTION_RETURN_PAIR(Runtime_LoadLookupSlotNoReferenceError) {
return LoadLookupSlotHelper(args, isolate, false);
}
RUNTIME_FUNCTION(Runtime_StoreLookupSlot) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(Object, value, 0);
CONVERT_ARG_HANDLE_CHECKED(Context, context, 1);
CONVERT_ARG_HANDLE_CHECKED(String, name, 2);
CONVERT_STRICT_MODE_ARG_CHECKED(strict_mode, 3);
int index;
PropertyAttributes attributes;
ContextLookupFlags flags = FOLLOW_CHAINS;
BindingFlags binding_flags;
Handle<Object> holder = context->Lookup(name,
flags,
&index,
&attributes,
&binding_flags);
// In case of JSProxy, an exception might have been thrown.
if (isolate->has_pending_exception()) return isolate->heap()->exception();
// The property was found in a context slot.
if (index >= 0) {
if ((attributes & READ_ONLY) == 0) {
Handle<Context>::cast(holder)->set(index, *value);
} else if (strict_mode == STRICT) {
// Setting read only property in strict mode.
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewTypeError("strict_cannot_assign", HandleVector(&name, 1)));
}
return *value;
}
// Slow case: The property is not in a context slot. It is either in a
// context extension object, a property of the subject of a with, or a
// property of the global object.
Handle<JSReceiver> object;
if (attributes != ABSENT) {
// The property exists on the holder.
object = Handle<JSReceiver>::cast(holder);
} else if (strict_mode == STRICT) {
// If absent in strict mode: throw.
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewReferenceError("not_defined", HandleVector(&name, 1)));
} else {
// If absent in sloppy mode: add the property to the global object.
object = Handle<JSReceiver>(context->global_object());
}
RETURN_FAILURE_ON_EXCEPTION(
isolate, Object::SetProperty(object, name, value, strict_mode));
return *value;
}
RUNTIME_FUNCTION(Runtime_Throw) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
return isolate->Throw(args[0]);
}
RUNTIME_FUNCTION(Runtime_ReThrow) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
return isolate->ReThrow(args[0]);
}
RUNTIME_FUNCTION(Runtime_PromoteScheduledException) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
return isolate->PromoteScheduledException();
}
RUNTIME_FUNCTION(Runtime_ThrowReferenceError) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, name, 0);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewReferenceError("not_defined", HandleVector(&name, 1)));
}
RUNTIME_FUNCTION(Runtime_ThrowNonMethodError) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewReferenceError("non_method", HandleVector<Object>(NULL, 0)));
}
RUNTIME_FUNCTION(Runtime_ThrowUnsupportedSuperError) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewReferenceError("unsupported_super", HandleVector<Object>(NULL, 0)));
}
RUNTIME_FUNCTION(Runtime_ThrowNotDateError) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError("not_date_object", HandleVector<Object>(NULL, 0)));
}
RUNTIME_FUNCTION(Runtime_StackGuard) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
// First check if this is a real stack overflow.
StackLimitCheck check(isolate);
if (check.JsHasOverflowed()) {
return isolate->StackOverflow();
}
return isolate->stack_guard()->HandleInterrupts();
}
RUNTIME_FUNCTION(Runtime_TryInstallOptimizedCode) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
// First check if this is a real stack overflow.
StackLimitCheck check(isolate);
if (check.JsHasOverflowed()) {
SealHandleScope shs(isolate);
return isolate->StackOverflow();
}
isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
return (function->IsOptimized()) ? function->code()
: function->shared()->code();
}
RUNTIME_FUNCTION(Runtime_Interrupt) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
return isolate->stack_guard()->HandleInterrupts();
}
static int StackSize(Isolate* isolate) {
int n = 0;
for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) n++;
return n;
}
static void PrintTransition(Isolate* isolate, Object* result) {
// indentation
{ const int nmax = 80;
int n = StackSize(isolate);
if (n <= nmax)
PrintF("%4d:%*s", n, n, "");
else
PrintF("%4d:%*s", n, nmax, "...");
}
if (result == NULL) {
JavaScriptFrame::PrintTop(isolate, stdout, true, false);
PrintF(" {\n");
} else {
// function result
PrintF("} -> ");
result->ShortPrint();
PrintF("\n");
}
}
RUNTIME_FUNCTION(Runtime_TraceEnter) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
PrintTransition(isolate, NULL);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_TraceExit) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
PrintTransition(isolate, obj);
return obj; // return TOS
}
RUNTIME_FUNCTION(Runtime_DebugPrint) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
OFStream os(stdout);
#ifdef DEBUG
if (args[0]->IsString()) {
// If we have a string, assume it's a code "marker"
// and print some interesting cpu debugging info.
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
os << "fp = " << frame->fp() << ", sp = " << frame->sp()
<< ", caller_sp = " << frame->caller_sp() << ": ";
} else {
os << "DebugPrint: ";
}
args[0]->Print(os);
if (args[0]->IsHeapObject()) {
os << "\n";
HeapObject::cast(args[0])->map()->Print(os);
}
#else
// ShortPrint is available in release mode. Print is not.
os << Brief(args[0]);
#endif
os << endl;
return args[0]; // return TOS
}
RUNTIME_FUNCTION(Runtime_DebugTrace) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
isolate->PrintStack(stdout);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DateCurrentTime) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
if (FLAG_log_timer_events) LOG(isolate, CurrentTimeEvent());
// According to ECMA-262, section 15.9.1, page 117, the precision of
// the number in a Date object representing a particular instant in
// time is milliseconds. Therefore, we floor the result of getting
// the OS time.
double millis;
if (FLAG_verify_predictable) {
millis = 1388534400000.0; // Jan 1 2014 00:00:00 GMT+0000
millis += Floor(isolate->heap()->synthetic_time());
} else {
millis = Floor(base::OS::TimeCurrentMillis());
}
return *isolate->factory()->NewNumber(millis);
}
RUNTIME_FUNCTION(Runtime_DateParseString) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, str, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArray, output, 1);
RUNTIME_ASSERT(output->HasFastElements());
JSObject::EnsureCanContainHeapObjectElements(output);
RUNTIME_ASSERT(output->HasFastObjectElements());
Handle<FixedArray> output_array(FixedArray::cast(output->elements()));
RUNTIME_ASSERT(output_array->length() >= DateParser::OUTPUT_SIZE);
str = String::Flatten(str);
DisallowHeapAllocation no_gc;
bool result;
String::FlatContent str_content = str->GetFlatContent();
if (str_content.IsOneByte()) {
result = DateParser::Parse(str_content.ToOneByteVector(),
*output_array,
isolate->unicode_cache());
} else {
DCHECK(str_content.IsTwoByte());
result = DateParser::Parse(str_content.ToUC16Vector(),
*output_array,
isolate->unicode_cache());
}
if (result) {
return *output;
} else {
return isolate->heap()->null_value();
}
}
RUNTIME_FUNCTION(Runtime_DateLocalTimezone) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
RUNTIME_ASSERT(x >= -DateCache::kMaxTimeBeforeUTCInMs &&
x <= DateCache::kMaxTimeBeforeUTCInMs);
const char* zone =
isolate->date_cache()->LocalTimezone(static_cast<int64_t>(x));
Handle<String> result = isolate->factory()->NewStringFromUtf8(
CStrVector(zone)).ToHandleChecked();
return *result;
}
RUNTIME_FUNCTION(Runtime_DateToUTC) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_DOUBLE_ARG_CHECKED(x, 0);
RUNTIME_ASSERT(x >= -DateCache::kMaxTimeBeforeUTCInMs &&
x <= DateCache::kMaxTimeBeforeUTCInMs);
int64_t time = isolate->date_cache()->ToUTC(static_cast<int64_t>(x));
return *isolate->factory()->NewNumber(static_cast<double>(time));
}
RUNTIME_FUNCTION(Runtime_DateCacheVersion) {
HandleScope hs(isolate);
DCHECK(args.length() == 0);
if (!isolate->eternal_handles()->Exists(EternalHandles::DATE_CACHE_VERSION)) {
Handle<FixedArray> date_cache_version =
isolate->factory()->NewFixedArray(1, TENURED);
date_cache_version->set(0, Smi::FromInt(0));
isolate->eternal_handles()->CreateSingleton(
isolate, *date_cache_version, EternalHandles::DATE_CACHE_VERSION);
}
Handle<FixedArray> date_cache_version =
Handle<FixedArray>::cast(isolate->eternal_handles()->GetSingleton(
EternalHandles::DATE_CACHE_VERSION));
// Return result as a JS array.
Handle<JSObject> result =
isolate->factory()->NewJSObject(isolate->array_function());
JSArray::SetContent(Handle<JSArray>::cast(result), date_cache_version);
return *result;
}
RUNTIME_FUNCTION(Runtime_GlobalProxy) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, global, 0);
if (!global->IsJSGlobalObject()) return isolate->heap()->null_value();
return JSGlobalObject::cast(global)->global_proxy();
}
RUNTIME_FUNCTION(Runtime_IsAttachedGlobal) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, global, 0);
if (!global->IsJSGlobalObject()) return isolate->heap()->false_value();
return isolate->heap()->ToBoolean(
!JSGlobalObject::cast(global)->IsDetached());
}
RUNTIME_FUNCTION(Runtime_ParseJson) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
source = String::Flatten(source);
// Optimized fast case where we only have Latin1 characters.
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
source->IsSeqOneByteString() ? JsonParser<true>::Parse(source)
: JsonParser<false>::Parse(source));
return *result;
}
bool CodeGenerationFromStringsAllowed(Isolate* isolate,
Handle<Context> context) {
DCHECK(context->allow_code_gen_from_strings()->IsFalse());
// Check with callback if set.
AllowCodeGenerationFromStringsCallback callback =
isolate->allow_code_gen_callback();
if (callback == NULL) {
// No callback set and code generation disallowed.
return false;
} else {
// Callback set. Let it decide if code generation is allowed.
VMState<EXTERNAL> state(isolate);
return callback(v8::Utils::ToLocal(context));
}
}
RUNTIME_FUNCTION(Runtime_CompileString) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
CONVERT_BOOLEAN_ARG_CHECKED(function_literal_only, 1);
// Extract native context.
Handle<Context> context(isolate->native_context());
// Check if native context allows code generation from
// strings. Throw an exception if it doesn't.
if (context->allow_code_gen_from_strings()->IsFalse() &&
!CodeGenerationFromStringsAllowed(isolate, context)) {
Handle<Object> error_message =
context->ErrorMessageForCodeGenerationFromStrings();
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewEvalError("code_gen_from_strings",
HandleVector<Object>(&error_message, 1)));
}
// Compile source string in the native context.
ParseRestriction restriction = function_literal_only
? ONLY_SINGLE_FUNCTION_LITERAL : NO_PARSE_RESTRICTION;
Handle<SharedFunctionInfo> outer_info(context->closure()->shared(), isolate);
Handle<JSFunction> fun;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, fun,
Compiler::GetFunctionFromEval(
source, outer_info,
context, SLOPPY, restriction, RelocInfo::kNoPosition));
return *fun;
}
static ObjectPair CompileGlobalEval(Isolate* isolate,
Handle<String> source,
Handle<SharedFunctionInfo> outer_info,
Handle<Object> receiver,
StrictMode strict_mode,
int scope_position) {
Handle<Context> context = Handle<Context>(isolate->context());
Handle<Context> native_context = Handle<Context>(context->native_context());
// Check if native context allows code generation from
// strings. Throw an exception if it doesn't.
if (native_context->allow_code_gen_from_strings()->IsFalse() &&
!CodeGenerationFromStringsAllowed(isolate, native_context)) {
Handle<Object> error_message =
native_context->ErrorMessageForCodeGenerationFromStrings();
Handle<Object> error;
MaybeHandle<Object> maybe_error = isolate->factory()->NewEvalError(
"code_gen_from_strings", HandleVector<Object>(&error_message, 1));
if (maybe_error.ToHandle(&error)) isolate->Throw(*error);
return MakePair(isolate->heap()->exception(), NULL);
}
// Deal with a normal eval call with a string argument. Compile it
// and return the compiled function bound in the local context.
static const ParseRestriction restriction = NO_PARSE_RESTRICTION;
Handle<JSFunction> compiled;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, compiled,
Compiler::GetFunctionFromEval(
source, outer_info,
context, strict_mode, restriction, scope_position),
MakePair(isolate->heap()->exception(), NULL));
return MakePair(*compiled, *receiver);
}
RUNTIME_FUNCTION_RETURN_PAIR(Runtime_ResolvePossiblyDirectEval) {
HandleScope scope(isolate);
DCHECK(args.length() == 6);
Handle<Object> callee = args.at<Object>(0);
// If "eval" didn't refer to the original GlobalEval, it's not a
// direct call to eval.
// (And even if it is, but the first argument isn't a string, just let
// execution default to an indirect call to eval, which will also return
// the first argument without doing anything).
if (*callee != isolate->native_context()->global_eval_fun() ||
!args[1]->IsString()) {
return MakePair(*callee, isolate->heap()->undefined_value());
}
DCHECK(args[4]->IsSmi());
DCHECK(args.smi_at(4) == SLOPPY || args.smi_at(4) == STRICT);
StrictMode strict_mode = static_cast<StrictMode>(args.smi_at(4));
DCHECK(args[5]->IsSmi());
Handle<SharedFunctionInfo> outer_info(args.at<JSFunction>(2)->shared(),
isolate);
return CompileGlobalEval(isolate,
args.at<String>(1),
outer_info,
args.at<Object>(3),
strict_mode,
args.smi_at(5));
}
RUNTIME_FUNCTION(Runtime_AllocateInNewSpace) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_SMI_ARG_CHECKED(size, 0);
RUNTIME_ASSERT(IsAligned(size, kPointerSize));
RUNTIME_ASSERT(size > 0);
RUNTIME_ASSERT(size <= Page::kMaxRegularHeapObjectSize);
return *isolate->factory()->NewFillerObject(size, false, NEW_SPACE);
}
RUNTIME_FUNCTION(Runtime_AllocateInTargetSpace) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_SMI_ARG_CHECKED(size, 0);
CONVERT_SMI_ARG_CHECKED(flags, 1);
RUNTIME_ASSERT(IsAligned(size, kPointerSize));
RUNTIME_ASSERT(size > 0);
RUNTIME_ASSERT(size <= Page::kMaxRegularHeapObjectSize);
bool double_align = AllocateDoubleAlignFlag::decode(flags);
AllocationSpace space = AllocateTargetSpace::decode(flags);
return *isolate->factory()->NewFillerObject(size, double_align, space);
}
// Push an object unto an array of objects if it is not already in the
// array. Returns true if the element was pushed on the stack and
// false otherwise.
RUNTIME_FUNCTION(Runtime_PushIfAbsent) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, element, 1);
RUNTIME_ASSERT(array->HasFastSmiOrObjectElements());
int length = Smi::cast(array->length())->value();
FixedArray* elements = FixedArray::cast(array->elements());
for (int i = 0; i < length; i++) {
if (elements->get(i) == *element) return isolate->heap()->false_value();
}
// Strict not needed. Used for cycle detection in Array join implementation.
RETURN_FAILURE_ON_EXCEPTION(
isolate,
JSObject::SetFastElement(array, length, element, SLOPPY, true));
return isolate->heap()->true_value();
}
/**
* A simple visitor visits every element of Array's.
* The backend storage can be a fixed array for fast elements case,
* or a dictionary for sparse array. Since Dictionary is a subtype
* of FixedArray, the class can be used by both fast and slow cases.
* The second parameter of the constructor, fast_elements, specifies
* whether the storage is a FixedArray or Dictionary.
*
* An index limit is used to deal with the situation that a result array
* length overflows 32-bit non-negative integer.
*/
class ArrayConcatVisitor {
public:
ArrayConcatVisitor(Isolate* isolate,
Handle<FixedArray> storage,
bool fast_elements) :
isolate_(isolate),
storage_(Handle<FixedArray>::cast(
isolate->global_handles()->Create(*storage))),
index_offset_(0u),
fast_elements_(fast_elements),
exceeds_array_limit_(false) { }
~ArrayConcatVisitor() {
clear_storage();
}
void visit(uint32_t i, Handle<Object> elm) {
if (i > JSObject::kMaxElementCount - index_offset_) {
exceeds_array_limit_ = true;
return;
}
uint32_t index = index_offset_ + i;
if (fast_elements_) {
if (index < static_cast<uint32_t>(storage_->length())) {
storage_->set(index, *elm);
return;
}
// Our initial estimate of length was foiled, possibly by
// getters on the arrays increasing the length of later arrays
// during iteration.
// This shouldn't happen in anything but pathological cases.
SetDictionaryMode();
// Fall-through to dictionary mode.
}
DCHECK(!fast_elements_);
Handle<SeededNumberDictionary> dict(
SeededNumberDictionary::cast(*storage_));
Handle<SeededNumberDictionary> result =
SeededNumberDictionary::AtNumberPut(dict, index, elm);
if (!result.is_identical_to(dict)) {
// Dictionary needed to grow.
clear_storage();
set_storage(*result);
}
}
void increase_index_offset(uint32_t delta) {
if (JSObject::kMaxElementCount - index_offset_ < delta) {
index_offset_ = JSObject::kMaxElementCount;
} else {
index_offset_ += delta;
}
// If the initial length estimate was off (see special case in visit()),
// but the array blowing the limit didn't contain elements beyond the
// provided-for index range, go to dictionary mode now.
if (fast_elements_ &&
index_offset_ >
static_cast<uint32_t>(FixedArrayBase::cast(*storage_)->length())) {
SetDictionaryMode();
}
}
bool exceeds_array_limit() {
return exceeds_array_limit_;
}
Handle<JSArray> ToArray() {
Handle<JSArray> array = isolate_->factory()->NewJSArray(0);
Handle<Object> length =
isolate_->factory()->NewNumber(static_cast<double>(index_offset_));
Handle<Map> map = JSObject::GetElementsTransitionMap(
array,
fast_elements_ ? FAST_HOLEY_ELEMENTS : DICTIONARY_ELEMENTS);
array->set_map(*map);
array->set_length(*length);
array->set_elements(*storage_);
return array;
}
private:
// Convert storage to dictionary mode.
void SetDictionaryMode() {
DCHECK(fast_elements_);
Handle<FixedArray> current_storage(*storage_);
Handle<SeededNumberDictionary> slow_storage(
SeededNumberDictionary::New(isolate_, current_storage->length()));
uint32_t current_length = static_cast<uint32_t>(current_storage->length());
for (uint32_t i = 0; i < current_length; i++) {
HandleScope loop_scope(isolate_);
Handle<Object> element(current_storage->get(i), isolate_);
if (!element->IsTheHole()) {
Handle<SeededNumberDictionary> new_storage =
SeededNumberDictionary::AtNumberPut(slow_storage, i, element);
if (!new_storage.is_identical_to(slow_storage)) {
slow_storage = loop_scope.CloseAndEscape(new_storage);
}
}
}
clear_storage();
set_storage(*slow_storage);
fast_elements_ = false;
}
inline void clear_storage() {
GlobalHandles::Destroy(Handle<Object>::cast(storage_).location());
}
inline void set_storage(FixedArray* storage) {
storage_ = Handle<FixedArray>::cast(
isolate_->global_handles()->Create(storage));
}
Isolate* isolate_;
Handle<FixedArray> storage_; // Always a global handle.
// Index after last seen index. Always less than or equal to
// JSObject::kMaxElementCount.
uint32_t index_offset_;
bool fast_elements_ : 1;
bool exceeds_array_limit_ : 1;
};
static uint32_t EstimateElementCount(Handle<JSArray> array) {
uint32_t length = static_cast<uint32_t>(array->length()->Number());
int element_count = 0;
switch (array->GetElementsKind()) {
case FAST_SMI_ELEMENTS:
case FAST_HOLEY_SMI_ELEMENTS:
case FAST_ELEMENTS:
case FAST_HOLEY_ELEMENTS: {
// Fast elements can't have lengths that are not representable by
// a 32-bit signed integer.
DCHECK(static_cast<int32_t>(FixedArray::kMaxLength) >= 0);
int fast_length = static_cast<int>(length);
Handle<FixedArray> elements(FixedArray::cast(array->elements()));
for (int i = 0; i < fast_length; i++) {
if (!elements->get(i)->IsTheHole()) element_count++;
}
break;
}
case FAST_DOUBLE_ELEMENTS:
case FAST_HOLEY_DOUBLE_ELEMENTS: {
// Fast elements can't have lengths that are not representable by
// a 32-bit signed integer.
DCHECK(static_cast<int32_t>(FixedDoubleArray::kMaxLength) >= 0);
int fast_length = static_cast<int>(length);
if (array->elements()->IsFixedArray()) {
DCHECK(FixedArray::cast(array->elements())->length() == 0);
break;
}
Handle<FixedDoubleArray> elements(
FixedDoubleArray::cast(array->elements()));
for (int i = 0; i < fast_length; i++) {
if (!elements->is_the_hole(i)) element_count++;
}
break;
}
case DICTIONARY_ELEMENTS: {
Handle<SeededNumberDictionary> dictionary(
SeededNumberDictionary::cast(array->elements()));
int capacity = dictionary->Capacity();
for (int i = 0; i < capacity; i++) {
Handle<Object> key(dictionary->KeyAt(i), array->GetIsolate());
if (dictionary->IsKey(*key)) {
element_count++;
}
}
break;
}
case SLOPPY_ARGUMENTS_ELEMENTS:
#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
case EXTERNAL_##TYPE##_ELEMENTS: \
case TYPE##_ELEMENTS: \
TYPED_ARRAYS(TYPED_ARRAY_CASE)
#undef TYPED_ARRAY_CASE
// External arrays are always dense.
return length;
}
// As an estimate, we assume that the prototype doesn't contain any
// inherited elements.
return element_count;
}
template<class ExternalArrayClass, class ElementType>
static void IterateExternalArrayElements(Isolate* isolate,
Handle<JSObject> receiver,
bool elements_are_ints,
bool elements_are_guaranteed_smis,
ArrayConcatVisitor* visitor) {
Handle<ExternalArrayClass> array(
ExternalArrayClass::cast(receiver->elements()));
uint32_t len = static_cast<uint32_t>(array->length());
DCHECK(visitor != NULL);
if (elements_are_ints) {
if (elements_are_guaranteed_smis) {
for (uint32_t j = 0; j < len; j++) {
HandleScope loop_scope(isolate);
Handle<Smi> e(Smi::FromInt(static_cast<int>(array->get_scalar(j))),
isolate);
visitor->visit(j, e);
}
} else {
for (uint32_t j = 0; j < len; j++) {
HandleScope loop_scope(isolate);
int64_t val = static_cast<int64_t>(array->get_scalar(j));
if (Smi::IsValid(static_cast<intptr_t>(val))) {
Handle<Smi> e(Smi::FromInt(static_cast<int>(val)), isolate);
visitor->visit(j, e);
} else {
Handle<Object> e =
isolate->factory()->NewNumber(static_cast<ElementType>(val));
visitor->visit(j, e);
}
}
}
} else {
for (uint32_t j = 0; j < len; j++) {
HandleScope loop_scope(isolate);
Handle<Object> e = isolate->factory()->NewNumber(array->get_scalar(j));
visitor->visit(j, e);
}
}
}
// Used for sorting indices in a List<uint32_t>.
static int compareUInt32(const uint32_t* ap, const uint32_t* bp) {
uint32_t a = *ap;
uint32_t b = *bp;
return (a == b) ? 0 : (a < b) ? -1 : 1;
}
static void CollectElementIndices(Handle<JSObject> object,
uint32_t range,
List<uint32_t>* indices) {
Isolate* isolate = object->GetIsolate();
ElementsKind kind = object->GetElementsKind();
switch (kind) {
case FAST_SMI_ELEMENTS:
case FAST_ELEMENTS:
case FAST_HOLEY_SMI_ELEMENTS:
case FAST_HOLEY_ELEMENTS: {
Handle<FixedArray> elements(FixedArray::cast(object->elements()));
uint32_t length = static_cast<uint32_t>(elements->length());
if (range < length) length = range;
for (uint32_t i = 0; i < length; i++) {
if (!elements->get(i)->IsTheHole()) {
indices->Add(i);
}
}
break;
}
case FAST_HOLEY_DOUBLE_ELEMENTS:
case FAST_DOUBLE_ELEMENTS: {
if (object->elements()->IsFixedArray()) {
DCHECK(object->elements()->length() == 0);
break;
}
Handle<FixedDoubleArray> elements(
FixedDoubleArray::cast(object->elements()));
uint32_t length = static_cast<uint32_t>(elements->length());
if (range < length) length = range;
for (uint32_t i = 0; i < length; i++) {
if (!elements->is_the_hole(i)) {
indices->Add(i);
}
}
break;
}
case DICTIONARY_ELEMENTS: {
Handle<SeededNumberDictionary> dict(
SeededNumberDictionary::cast(object->elements()));
uint32_t capacity = dict->Capacity();
for (uint32_t j = 0; j < capacity; j++) {
HandleScope loop_scope(isolate);
Handle<Object> k(dict->KeyAt(j), isolate);
if (dict->IsKey(*k)) {
DCHECK(k->IsNumber());
uint32_t index = static_cast<uint32_t>(k->Number());
if (index < range) {
indices->Add(index);
}
}
}
break;
}
#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
case TYPE##_ELEMENTS: \
case EXTERNAL_##TYPE##_ELEMENTS:
TYPED_ARRAYS(TYPED_ARRAY_CASE)
#undef TYPED_ARRAY_CASE
{
uint32_t length = static_cast<uint32_t>(
FixedArrayBase::cast(object->elements())->length());
if (range <= length) {
length = range;
// We will add all indices, so we might as well clear it first
// and avoid duplicates.
indices->Clear();
}
for (uint32_t i = 0; i < length; i++) {
indices->Add(i);
}
if (length == range) return; // All indices accounted for already.
break;
}
case SLOPPY_ARGUMENTS_ELEMENTS: {
MaybeHandle<Object> length_obj =
Object::GetProperty(object, isolate->factory()->length_string());
double length_num = length_obj.ToHandleChecked()->Number();
uint32_t length = static_cast<uint32_t>(DoubleToInt32(length_num));
ElementsAccessor* accessor = object->GetElementsAccessor();
for (uint32_t i = 0; i < length; i++) {
if (accessor->HasElement(object, object, i)) {
indices->Add(i);
}
}
break;
}
}
PrototypeIterator iter(isolate, object);
if (!iter.IsAtEnd()) {
// The prototype will usually have no inherited element indices,
// but we have to check.
CollectElementIndices(
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)), range,
indices);
}
}
/**
* A helper function that visits elements of a JSArray in numerical
* order.
*
* The visitor argument called for each existing element in the array
* with the element index and the element's value.
* Afterwards it increments the base-index of the visitor by the array
* length.
* Returns false if any access threw an exception, otherwise true.
*/
static bool IterateElements(Isolate* isolate,
Handle<JSArray> receiver,
ArrayConcatVisitor* visitor) {
uint32_t length = static_cast<uint32_t>(receiver->length()->Number());
switch (receiver->GetElementsKind()) {
case FAST_SMI_ELEMENTS:
case FAST_ELEMENTS:
case FAST_HOLEY_SMI_ELEMENTS:
case FAST_HOLEY_ELEMENTS: {
// Run through the elements FixedArray and use HasElement and GetElement
// to check the prototype for missing elements.
Handle<FixedArray> elements(FixedArray::cast(receiver->elements()));
int fast_length = static_cast<int>(length);
DCHECK(fast_length <= elements->length());
for (int j = 0; j < fast_length; j++) {
HandleScope loop_scope(isolate);
Handle<Object> element_value(elements->get(j), isolate);
if (!element_value->IsTheHole()) {
visitor->visit(j, element_value);
} else {
Maybe<bool> maybe = JSReceiver::HasElement(receiver, j);
if (!maybe.has_value) return false;
if (maybe.value) {
// Call GetElement on receiver, not its prototype, or getters won't
// have the correct receiver.
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, element_value,
Object::GetElement(isolate, receiver, j), false);
visitor->visit(j, element_value);
}
}
}
break;
}
case FAST_HOLEY_DOUBLE_ELEMENTS:
case FAST_DOUBLE_ELEMENTS: {
// Empty array is FixedArray but not FixedDoubleArray.
if (length == 0) break;
// Run through the elements FixedArray and use HasElement and GetElement
// to check the prototype for missing elements.
if (receiver->elements()->IsFixedArray()) {
DCHECK(receiver->elements()->length() == 0);
break;
}
Handle<FixedDoubleArray> elements(
FixedDoubleArray::cast(receiver->elements()));
int fast_length = static_cast<int>(length);
DCHECK(fast_length <= elements->length());
for (int j = 0; j < fast_length; j++) {
HandleScope loop_scope(isolate);
if (!elements->is_the_hole(j)) {
double double_value = elements->get_scalar(j);
Handle<Object> element_value =
isolate->factory()->NewNumber(double_value);
visitor->visit(j, element_value);
} else {
Maybe<bool> maybe = JSReceiver::HasElement(receiver, j);
if (!maybe.has_value) return false;
if (maybe.value) {
// Call GetElement on receiver, not its prototype, or getters won't
// have the correct receiver.
Handle<Object> element_value;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, element_value,
Object::GetElement(isolate, receiver, j), false);
visitor->visit(j, element_value);
}
}
}
break;
}
case DICTIONARY_ELEMENTS: {
Handle<SeededNumberDictionary> dict(receiver->element_dictionary());
List<uint32_t> indices(dict->Capacity() / 2);
// Collect all indices in the object and the prototypes less
// than length. This might introduce duplicates in the indices list.
CollectElementIndices(receiver, length, &indices);
indices.Sort(&compareUInt32);
int j = 0;
int n = indices.length();
while (j < n) {
HandleScope loop_scope(isolate);
uint32_t index = indices[j];
Handle<Object> element;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, element,
Object::GetElement(isolate, receiver, index),
false);
visitor->visit(index, element);
// Skip to next different index (i.e., omit duplicates).
do {
j++;
} while (j < n && indices[j] == index);
}
break;
}
case EXTERNAL_UINT8_CLAMPED_ELEMENTS: {
Handle<ExternalUint8ClampedArray> pixels(ExternalUint8ClampedArray::cast(
receiver->elements()));
for (uint32_t j = 0; j < length; j++) {
Handle<Smi> e(Smi::FromInt(pixels->get_scalar(j)), isolate);
visitor->visit(j, e);
}
break;
}
case EXTERNAL_INT8_ELEMENTS: {
IterateExternalArrayElements<ExternalInt8Array, int8_t>(
isolate, receiver, true, true, visitor);
break;
}
case EXTERNAL_UINT8_ELEMENTS: {
IterateExternalArrayElements<ExternalUint8Array, uint8_t>(
isolate, receiver, true, true, visitor);
break;
}
case EXTERNAL_INT16_ELEMENTS: {
IterateExternalArrayElements<ExternalInt16Array, int16_t>(
isolate, receiver, true, true, visitor);
break;
}
case EXTERNAL_UINT16_ELEMENTS: {
IterateExternalArrayElements<ExternalUint16Array, uint16_t>(
isolate, receiver, true, true, visitor);
break;
}
case EXTERNAL_INT32_ELEMENTS: {
IterateExternalArrayElements<ExternalInt32Array, int32_t>(
isolate, receiver, true, false, visitor);
break;
}
case EXTERNAL_UINT32_ELEMENTS: {
IterateExternalArrayElements<ExternalUint32Array, uint32_t>(
isolate, receiver, true, false, visitor);
break;
}
case EXTERNAL_FLOAT32_ELEMENTS: {
IterateExternalArrayElements<ExternalFloat32Array, float>(
isolate, receiver, false, false, visitor);
break;
}
case EXTERNAL_FLOAT64_ELEMENTS: {
IterateExternalArrayElements<ExternalFloat64Array, double>(
isolate, receiver, false, false, visitor);
break;
}
default:
UNREACHABLE();
break;
}
visitor->increase_index_offset(length);
return true;
}
/**
* Array::concat implementation.
* See ECMAScript 262, 15.4.4.4.
* TODO(581): Fix non-compliance for very large concatenations and update to
* following the ECMAScript 5 specification.
*/
RUNTIME_FUNCTION(Runtime_ArrayConcat) {
HandleScope handle_scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, arguments, 0);
int argument_count = static_cast<int>(arguments->length()->Number());
RUNTIME_ASSERT(arguments->HasFastObjectElements());
Handle<FixedArray> elements(FixedArray::cast(arguments->elements()));
// Pass 1: estimate the length and number of elements of the result.
// The actual length can be larger if any of the arguments have getters
// that mutate other arguments (but will otherwise be precise).
// The number of elements is precise if there are no inherited elements.
ElementsKind kind = FAST_SMI_ELEMENTS;
uint32_t estimate_result_length = 0;
uint32_t estimate_nof_elements = 0;
for (int i = 0; i < argument_count; i++) {
HandleScope loop_scope(isolate);
Handle<Object> obj(elements->get(i), isolate);
uint32_t length_estimate;
uint32_t element_estimate;
if (obj->IsJSArray()) {
Handle<JSArray> array(Handle<JSArray>::cast(obj));
length_estimate = static_cast<uint32_t>(array->length()->Number());
if (length_estimate != 0) {
ElementsKind array_kind =
GetPackedElementsKind(array->map()->elements_kind());
if (IsMoreGeneralElementsKindTransition(kind, array_kind)) {
kind = array_kind;
}
}
element_estimate = EstimateElementCount(array);
} else {
if (obj->IsHeapObject()) {
if (obj->IsNumber()) {
if (IsMoreGeneralElementsKindTransition(kind, FAST_DOUBLE_ELEMENTS)) {
kind = FAST_DOUBLE_ELEMENTS;
}
} else if (IsMoreGeneralElementsKindTransition(kind, FAST_ELEMENTS)) {
kind = FAST_ELEMENTS;
}
}
length_estimate = 1;
element_estimate = 1;
}
// Avoid overflows by capping at kMaxElementCount.
if (JSObject::kMaxElementCount - estimate_result_length <
length_estimate) {
estimate_result_length = JSObject::kMaxElementCount;
} else {
estimate_result_length += length_estimate;
}
if (JSObject::kMaxElementCount - estimate_nof_elements <
element_estimate) {
estimate_nof_elements = JSObject::kMaxElementCount;
} else {
estimate_nof_elements += element_estimate;
}
}
// If estimated number of elements is more than half of length, a
// fixed array (fast case) is more time and space-efficient than a
// dictionary.
bool fast_case = (estimate_nof_elements * 2) >= estimate_result_length;
if (fast_case && kind == FAST_DOUBLE_ELEMENTS) {
Handle<FixedArrayBase> storage =
isolate->factory()->NewFixedDoubleArray(estimate_result_length);
int j = 0;
bool failure = false;
if (estimate_result_length > 0) {
Handle<FixedDoubleArray> double_storage =
Handle<FixedDoubleArray>::cast(storage);
for (int i = 0; i < argument_count; i++) {
Handle<Object> obj(elements->get(i), isolate);
if (obj->IsSmi()) {
double_storage->set(j, Smi::cast(*obj)->value());
j++;
} else if (obj->IsNumber()) {
double_storage->set(j, obj->Number());
j++;
} else {
JSArray* array = JSArray::cast(*obj);
uint32_t length = static_cast<uint32_t>(array->length()->Number());
switch (array->map()->elements_kind()) {
case FAST_HOLEY_DOUBLE_ELEMENTS:
case FAST_DOUBLE_ELEMENTS: {
// Empty array is FixedArray but not FixedDoubleArray.
if (length == 0) break;
FixedDoubleArray* elements =
FixedDoubleArray::cast(array->elements());
for (uint32_t i = 0; i < length; i++) {
if (elements->is_the_hole(i)) {
// TODO(jkummerow/verwaest): We could be a bit more clever
// here: Check if there are no elements/getters on the
// prototype chain, and if so, allow creation of a holey
// result array.
// Same thing below (holey smi case).
failure = true;
break;
}
double double_value = elements->get_scalar(i);
double_storage->set(j, double_value);
j++;
}
break;
}
case FAST_HOLEY_SMI_ELEMENTS:
case FAST_SMI_ELEMENTS: {
FixedArray* elements(
FixedArray::cast(array->elements()));
for (uint32_t i = 0; i < length; i++) {
Object* element = elements->get(i);
if (element->IsTheHole()) {
failure = true;
break;
}
int32_t int_value = Smi::cast(element)->value();
double_storage->set(j, int_value);
j++;
}
break;
}
case FAST_HOLEY_ELEMENTS:
case FAST_ELEMENTS:
DCHECK_EQ(0, length);
break;
default:
UNREACHABLE();
}
}
if (failure) break;
}
}
if (!failure) {
Handle<JSArray> array = isolate->factory()->NewJSArray(0);
Smi* length = Smi::FromInt(j);
Handle<Map> map;
map = JSObject::GetElementsTransitionMap(array, kind);
array->set_map(*map);
array->set_length(length);
array->set_elements(*storage);
return *array;
}
// In case of failure, fall through.
}
Handle<FixedArray> storage;
if (fast_case) {
// The backing storage array must have non-existing elements to preserve
// holes across concat operations.
storage = isolate->factory()->NewFixedArrayWithHoles(
estimate_result_length);
} else {
// TODO(126): move 25% pre-allocation logic into Dictionary::Allocate
uint32_t at_least_space_for = estimate_nof_elements +
(estimate_nof_elements >> 2);
storage = Handle<FixedArray>::cast(
SeededNumberDictionary::New(isolate, at_least_space_for));
}
ArrayConcatVisitor visitor(isolate, storage, fast_case);
for (int i = 0; i < argument_count; i++) {
Handle<Object> obj(elements->get(i), isolate);
if (obj->IsJSArray()) {
Handle<JSArray> array = Handle<JSArray>::cast(obj);
if (!IterateElements(isolate, array, &visitor)) {
return isolate->heap()->exception();
}
} else {
visitor.visit(0, obj);
visitor.increase_index_offset(1);
}
}
if (visitor.exceeds_array_limit()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewRangeError("invalid_array_length", HandleVector<Object>(NULL, 0)));
}
return *visitor.ToArray();
}
// This will not allocate (flatten the string), but it may run
// very slowly for very deeply nested ConsStrings. For debugging use only.
RUNTIME_FUNCTION(Runtime_GlobalPrint) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(String, string, 0);
ConsStringIteratorOp op;
StringCharacterStream stream(string, &op);
while (stream.HasMore()) {
uint16_t character = stream.GetNext();
PrintF("%c", character);
}
return string;
}
// Moves all own elements of an object, that are below a limit, to positions
// starting at zero. All undefined values are placed after non-undefined values,
// and are followed by non-existing element. Does not change the length
// property.
// Returns the number of non-undefined elements collected.
// Returns -1 if hole removal is not supported by this method.
RUNTIME_FUNCTION(Runtime_RemoveArrayHoles) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_NUMBER_CHECKED(uint32_t, limit, Uint32, args[1]);
return *JSObject::PrepareElementsForSort(object, limit);
}
// Move contents of argument 0 (an array) to argument 1 (an array)
RUNTIME_FUNCTION(Runtime_MoveArrayContents) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, from, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArray, to, 1);
JSObject::ValidateElements(from);
JSObject::ValidateElements(to);
Handle<FixedArrayBase> new_elements(from->elements());
ElementsKind from_kind = from->GetElementsKind();
Handle<Map> new_map = JSObject::GetElementsTransitionMap(to, from_kind);
JSObject::SetMapAndElements(to, new_map, new_elements);
to->set_length(from->length());
JSObject::ResetElements(from);
from->set_length(Smi::FromInt(0));
JSObject::ValidateElements(to);
return *to;
}
// How many elements does this object/array have?
RUNTIME_FUNCTION(Runtime_EstimateNumberOfElements) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
Handle<FixedArrayBase> elements(array->elements(), isolate);
SealHandleScope shs(isolate);
if (elements->IsDictionary()) {
int result =
Handle<SeededNumberDictionary>::cast(elements)->NumberOfElements();
return Smi::FromInt(result);
} else {
DCHECK(array->length()->IsSmi());
// For packed elements, we know the exact number of elements
int length = elements->length();
ElementsKind kind = array->GetElementsKind();
if (IsFastPackedElementsKind(kind)) {
return Smi::FromInt(length);
}
// For holey elements, take samples from the buffer checking for holes
// to generate the estimate.
const int kNumberOfHoleCheckSamples = 97;
int increment = (length < kNumberOfHoleCheckSamples)
? 1
: static_cast<int>(length / kNumberOfHoleCheckSamples);
ElementsAccessor* accessor = array->GetElementsAccessor();
int holes = 0;
for (int i = 0; i < length; i += increment) {
if (!accessor->HasElement(array, array, i, elements)) {
++holes;
}
}
int estimate = static_cast<int>((kNumberOfHoleCheckSamples - holes) /
kNumberOfHoleCheckSamples * length);
return Smi::FromInt(estimate);
}
}
// Returns an array that tells you where in the [0, length) interval an array
// might have elements. Can either return an array of keys (positive integers
// or undefined) or a number representing the positive length of an interval
// starting at index 0.
// Intervals can span over some keys that are not in the object.
RUNTIME_FUNCTION(Runtime_GetArrayKeys) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
CONVERT_NUMBER_CHECKED(uint32_t, length, Uint32, args[1]);
if (array->elements()->IsDictionary()) {
Handle<FixedArray> keys = isolate->factory()->empty_fixed_array();
for (PrototypeIterator iter(isolate, array,
PrototypeIterator::START_AT_RECEIVER);
!iter.IsAtEnd(); iter.Advance()) {
if (PrototypeIterator::GetCurrent(iter)->IsJSProxy() ||
JSObject::cast(*PrototypeIterator::GetCurrent(iter))
->HasIndexedInterceptor()) {
// Bail out if we find a proxy or interceptor, likely not worth
// collecting keys in that case.
return *isolate->factory()->NewNumberFromUint(length);
}
Handle<JSObject> current =
Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
Handle<FixedArray> current_keys =
isolate->factory()->NewFixedArray(current->NumberOfOwnElements(NONE));
current->GetOwnElementKeys(*current_keys, NONE);
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, keys, FixedArray::UnionOfKeys(keys, current_keys));
}
// Erase any keys >= length.
// TODO(adamk): Remove this step when the contract of %GetArrayKeys
// is changed to let this happen on the JS side.
for (int i = 0; i < keys->length(); i++) {
if (NumberToUint32(keys->get(i)) >= length) keys->set_undefined(i);
}
return *isolate->factory()->NewJSArrayWithElements(keys);
} else {
RUNTIME_ASSERT(array->HasFastSmiOrObjectElements() ||
array->HasFastDoubleElements());
uint32_t actual_length = static_cast<uint32_t>(array->elements()->length());
return *isolate->factory()->NewNumberFromUint(Min(actual_length, length));
}
}
RUNTIME_FUNCTION(Runtime_LookupAccessor) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, receiver, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
CONVERT_SMI_ARG_CHECKED(flag, 2);
AccessorComponent component = flag == 0 ? ACCESSOR_GETTER : ACCESSOR_SETTER;
if (!receiver->IsJSObject()) return isolate->heap()->undefined_value();
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
JSObject::GetAccessor(Handle<JSObject>::cast(receiver), name, component));
return *result;
}
RUNTIME_FUNCTION(Runtime_DebugBreak) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
isolate->debug()->HandleDebugBreak();
return isolate->heap()->undefined_value();
}
// Helper functions for wrapping and unwrapping stack frame ids.
static Smi* WrapFrameId(StackFrame::Id id) {
DCHECK(IsAligned(OffsetFrom(id), static_cast<intptr_t>(4)));
return Smi::FromInt(id >> 2);
}
static StackFrame::Id UnwrapFrameId(int wrapped) {
return static_cast<StackFrame::Id>(wrapped << 2);
}
// Adds a JavaScript function as a debug event listener.
// args[0]: debug event listener function to set or null or undefined for
// clearing the event listener function
// args[1]: object supplied during callback
RUNTIME_FUNCTION(Runtime_SetDebugEventListener) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
RUNTIME_ASSERT(args[0]->IsJSFunction() ||
args[0]->IsUndefined() ||
args[0]->IsNull());
CONVERT_ARG_HANDLE_CHECKED(Object, callback, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, data, 1);
isolate->debug()->SetEventListener(callback, data);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_Break) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
isolate->stack_guard()->RequestDebugBreak();
return isolate->heap()->undefined_value();
}
static Handle<Object> DebugGetProperty(LookupIterator* it,
bool* has_caught = NULL) {
for (; it->IsFound(); it->Next()) {
switch (it->state()) {
case LookupIterator::NOT_FOUND:
case LookupIterator::TRANSITION:
UNREACHABLE();
case LookupIterator::ACCESS_CHECK:
// Ignore access checks.
break;
case LookupIterator::INTERCEPTOR:
case LookupIterator::JSPROXY:
return it->isolate()->factory()->undefined_value();
case LookupIterator::ACCESSOR: {
Handle<Object> accessors = it->GetAccessors();
if (!accessors->IsAccessorInfo()) {
return it->isolate()->factory()->undefined_value();
}
MaybeHandle<Object> maybe_result = JSObject::GetPropertyWithAccessor(
it->GetReceiver(), it->name(), it->GetHolder<JSObject>(),
accessors);
Handle<Object> result;
if (!maybe_result.ToHandle(&result)) {
result = handle(it->isolate()->pending_exception(), it->isolate());
it->isolate()->clear_pending_exception();
if (has_caught != NULL) *has_caught = true;
}
return result;
}
case LookupIterator::DATA:
return it->GetDataValue();
}
}
return it->isolate()->factory()->undefined_value();
}
// Get debugger related details for an object property, in the following format:
// 0: Property value
// 1: Property details
// 2: Property value is exception
// 3: Getter function if defined
// 4: Setter function if defined
// Items 2-4 are only filled if the property has either a getter or a setter.
RUNTIME_FUNCTION(Runtime_DebugGetPropertyDetails) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
// Make sure to set the current context to the context before the debugger was
// entered (if the debugger is entered). The reason for switching context here
// is that for some property lookups (accessors and interceptors) callbacks
// into the embedding application can occour, and the embedding application
// could have the assumption that its own native context is the current
// context and not some internal debugger context.
SaveContext save(isolate);
if (isolate->debug()->in_debug_scope()) {
isolate->set_context(*isolate->debug()->debugger_entry()->GetContext());
}
// Check if the name is trivially convertible to an index and get the element
// if so.
uint32_t index;
if (name->AsArrayIndex(&index)) {
Handle<FixedArray> details = isolate->factory()->NewFixedArray(2);
Handle<Object> element_or_char;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, element_or_char,
Runtime::GetElementOrCharAt(isolate, obj, index));
details->set(0, *element_or_char);
details->set(
1, PropertyDetails(NONE, NORMAL, Representation::None()).AsSmi());
return *isolate->factory()->NewJSArrayWithElements(details);
}
LookupIterator it(obj, name, LookupIterator::HIDDEN);
bool has_caught = false;
Handle<Object> value = DebugGetProperty(&it, &has_caught);
if (!it.IsFound()) return isolate->heap()->undefined_value();
Handle<Object> maybe_pair;
if (it.state() == LookupIterator::ACCESSOR) {
maybe_pair = it.GetAccessors();
}
// If the callback object is a fixed array then it contains JavaScript
// getter and/or setter.
bool has_js_accessors = !maybe_pair.is_null() && maybe_pair->IsAccessorPair();
Handle<FixedArray> details =
isolate->factory()->NewFixedArray(has_js_accessors ? 6 : 3);
details->set(0, *value);
// TODO(verwaest): Get rid of this random way of handling interceptors.
PropertyDetails d = it.state() == LookupIterator::INTERCEPTOR
? PropertyDetails(NONE, NORMAL, 0)
: it.property_details();
details->set(1, d.AsSmi());
details->set(
2, isolate->heap()->ToBoolean(it.state() == LookupIterator::INTERCEPTOR));
if (has_js_accessors) {
AccessorPair* accessors = AccessorPair::cast(*maybe_pair);
details->set(3, isolate->heap()->ToBoolean(has_caught));
details->set(4, accessors->GetComponent(ACCESSOR_GETTER));
details->set(5, accessors->GetComponent(ACCESSOR_SETTER));
}
return *isolate->factory()->NewJSArrayWithElements(details);
}
RUNTIME_FUNCTION(Runtime_DebugGetProperty) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
LookupIterator it(obj, name);
return *DebugGetProperty(&it);
}
// Return the property type calculated from the property details.
// args[0]: smi with property details.
RUNTIME_FUNCTION(Runtime_DebugPropertyTypeFromDetails) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_PROPERTY_DETAILS_CHECKED(details, 0);
return Smi::FromInt(static_cast<int>(details.type()));
}
// Return the property attribute calculated from the property details.
// args[0]: smi with property details.
RUNTIME_FUNCTION(Runtime_DebugPropertyAttributesFromDetails) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_PROPERTY_DETAILS_CHECKED(details, 0);
return Smi::FromInt(static_cast<int>(details.attributes()));
}
// Return the property insertion index calculated from the property details.
// args[0]: smi with property details.
RUNTIME_FUNCTION(Runtime_DebugPropertyIndexFromDetails) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_PROPERTY_DETAILS_CHECKED(details, 0);
// TODO(verwaest): Depends on the type of details.
return Smi::FromInt(details.dictionary_index());
}
// Return property value from named interceptor.
// args[0]: object
// args[1]: property name
RUNTIME_FUNCTION(Runtime_DebugNamedInterceptorPropertyValue) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
RUNTIME_ASSERT(obj->HasNamedInterceptor());
CONVERT_ARG_HANDLE_CHECKED(Name, name, 1);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, JSObject::GetProperty(obj, name));
return *result;
}
// Return element value from indexed interceptor.
// args[0]: object
// args[1]: index
RUNTIME_FUNCTION(Runtime_DebugIndexedInterceptorElementValue) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
RUNTIME_ASSERT(obj->HasIndexedInterceptor());
CONVERT_NUMBER_CHECKED(uint32_t, index, Uint32, args[1]);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, JSObject::GetElementWithInterceptor(obj, obj, index));
return *result;
}
static bool CheckExecutionState(Isolate* isolate, int break_id) {
return !isolate->debug()->debug_context().is_null() &&
isolate->debug()->break_id() != 0 &&
isolate->debug()->break_id() == break_id;
}
RUNTIME_FUNCTION(Runtime_CheckExecutionState) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
return isolate->heap()->true_value();
}
RUNTIME_FUNCTION(Runtime_GetFrameCount) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
// Count all frames which are relevant to debugging stack trace.
int n = 0;
StackFrame::Id id = isolate->debug()->break_frame_id();
if (id == StackFrame::NO_ID) {
// If there is no JavaScript stack frame count is 0.
return Smi::FromInt(0);
}
for (JavaScriptFrameIterator it(isolate, id); !it.done(); it.Advance()) {
List<FrameSummary> frames(FLAG_max_inlining_levels + 1);
it.frame()->Summarize(&frames);
for (int i = frames.length() - 1; i >= 0; i--) {
// Omit functions from native scripts.
if (!frames[i].function()->IsFromNativeScript()) n++;
}
}
return Smi::FromInt(n);
}
class FrameInspector {
public:
FrameInspector(JavaScriptFrame* frame,
int inlined_jsframe_index,
Isolate* isolate)
: frame_(frame), deoptimized_frame_(NULL), isolate_(isolate) {
// Calculate the deoptimized frame.
if (frame->is_optimized()) {
deoptimized_frame_ = Deoptimizer::DebuggerInspectableFrame(
frame, inlined_jsframe_index, isolate);
}
has_adapted_arguments_ = frame_->has_adapted_arguments();
is_bottommost_ = inlined_jsframe_index == 0;
is_optimized_ = frame_->is_optimized();
}
~FrameInspector() {
// Get rid of the calculated deoptimized frame if any.
if (deoptimized_frame_ != NULL) {
Deoptimizer::DeleteDebuggerInspectableFrame(deoptimized_frame_,
isolate_);
}
}
int GetParametersCount() {
return is_optimized_
? deoptimized_frame_->parameters_count()
: frame_->ComputeParametersCount();
}
int expression_count() { return deoptimized_frame_->expression_count(); }
Object* GetFunction() {
return is_optimized_
? deoptimized_frame_->GetFunction()
: frame_->function();
}
Object* GetParameter(int index) {
return is_optimized_
? deoptimized_frame_->GetParameter(index)
: frame_->GetParameter(index);
}
Object* GetExpression(int index) {
return is_optimized_
? deoptimized_frame_->GetExpression(index)
: frame_->GetExpression(index);
}
int GetSourcePosition() {
return is_optimized_
? deoptimized_frame_->GetSourcePosition()
: frame_->LookupCode()->SourcePosition(frame_->pc());
}
bool IsConstructor() {
return is_optimized_ && !is_bottommost_
? deoptimized_frame_->HasConstructStub()
: frame_->IsConstructor();
}
Object* GetContext() {
return is_optimized_ ? deoptimized_frame_->GetContext() : frame_->context();
}
// To inspect all the provided arguments the frame might need to be
// replaced with the arguments frame.
void SetArgumentsFrame(JavaScriptFrame* frame) {
DCHECK(has_adapted_arguments_);
frame_ = frame;
is_optimized_ = frame_->is_optimized();
DCHECK(!is_optimized_);
}
private:
JavaScriptFrame* frame_;
DeoptimizedFrameInfo* deoptimized_frame_;
Isolate* isolate_;
bool is_optimized_;
bool is_bottommost_;
bool has_adapted_arguments_;
DISALLOW_COPY_AND_ASSIGN(FrameInspector);
};
static const int kFrameDetailsFrameIdIndex = 0;
static const int kFrameDetailsReceiverIndex = 1;
static const int kFrameDetailsFunctionIndex = 2;
static const int kFrameDetailsArgumentCountIndex = 3;
static const int kFrameDetailsLocalCountIndex = 4;
static const int kFrameDetailsSourcePositionIndex = 5;
static const int kFrameDetailsConstructCallIndex = 6;
static const int kFrameDetailsAtReturnIndex = 7;
static const int kFrameDetailsFlagsIndex = 8;
static const int kFrameDetailsFirstDynamicIndex = 9;
static SaveContext* FindSavedContextForFrame(Isolate* isolate,
JavaScriptFrame* frame) {
SaveContext* save = isolate->save_context();
while (save != NULL && !save->IsBelowFrame(frame)) {
save = save->prev();
}
DCHECK(save != NULL);
return save;
}
// Advances the iterator to the frame that matches the index and returns the
// inlined frame index, or -1 if not found. Skips native JS functions.
static int FindIndexedNonNativeFrame(JavaScriptFrameIterator* it, int index) {
int count = -1;
for (; !it->done(); it->Advance()) {
List<FrameSummary> frames(FLAG_max_inlining_levels + 1);
it->frame()->Summarize(&frames);
for (int i = frames.length() - 1; i >= 0; i--) {
// Omit functions from native scripts.
if (frames[i].function()->IsFromNativeScript()) continue;
if (++count == index) return i;
}
}
return -1;
}
// Return an array with frame details
// args[0]: number: break id
// args[1]: number: frame index
//
// The array returned contains the following information:
// 0: Frame id
// 1: Receiver
// 2: Function
// 3: Argument count
// 4: Local count
// 5: Source position
// 6: Constructor call
// 7: Is at return
// 8: Flags
// Arguments name, value
// Locals name, value
// Return value if any
RUNTIME_FUNCTION(Runtime_GetFrameDetails) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
Heap* heap = isolate->heap();
// Find the relevant frame with the requested index.
StackFrame::Id id = isolate->debug()->break_frame_id();
if (id == StackFrame::NO_ID) {
// If there are no JavaScript stack frames return undefined.
return heap->undefined_value();
}
JavaScriptFrameIterator it(isolate, id);
// Inlined frame index in optimized frame, starting from outer function.
int inlined_jsframe_index = FindIndexedNonNativeFrame(&it, index);
if (inlined_jsframe_index == -1) return heap->undefined_value();
FrameInspector frame_inspector(it.frame(), inlined_jsframe_index, isolate);
bool is_optimized = it.frame()->is_optimized();
// Traverse the saved contexts chain to find the active context for the
// selected frame.
SaveContext* save = FindSavedContextForFrame(isolate, it.frame());
// Get the frame id.
Handle<Object> frame_id(WrapFrameId(it.frame()->id()), isolate);
// Find source position in unoptimized code.
int position = frame_inspector.GetSourcePosition();
// Check for constructor frame.
bool constructor = frame_inspector.IsConstructor();
// Get scope info and read from it for local variable information.
Handle<JSFunction> function(JSFunction::cast(frame_inspector.GetFunction()));
Handle<SharedFunctionInfo> shared(function->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
DCHECK(*scope_info != ScopeInfo::Empty(isolate));
// Get the locals names and values into a temporary array.
int local_count = scope_info->LocalCount();
for (int slot = 0; slot < scope_info->LocalCount(); ++slot) {
// Hide compiler-introduced temporary variables, whether on the stack or on
// the context.
if (scope_info->LocalIsSynthetic(slot))
local_count--;
}
Handle<FixedArray> locals =
isolate->factory()->NewFixedArray(local_count * 2);
// Fill in the values of the locals.
int local = 0;
int i = 0;
for (; i < scope_info->StackLocalCount(); ++i) {
// Use the value from the stack.
if (scope_info->LocalIsSynthetic(i))
continue;
locals->set(local * 2, scope_info->LocalName(i));
locals->set(local * 2 + 1, frame_inspector.GetExpression(i));
local++;
}
if (local < local_count) {
// Get the context containing declarations.
Handle<Context> context(
Context::cast(frame_inspector.GetContext())->declaration_context());
for (; i < scope_info->LocalCount(); ++i) {
if (scope_info->LocalIsSynthetic(i))
continue;
Handle<String> name(scope_info->LocalName(i));
VariableMode mode;
InitializationFlag init_flag;
MaybeAssignedFlag maybe_assigned_flag;
locals->set(local * 2, *name);
int context_slot_index = ScopeInfo::ContextSlotIndex(
scope_info, name, &mode, &init_flag, &maybe_assigned_flag);
Object* value = context->get(context_slot_index);
locals->set(local * 2 + 1, value);
local++;
}
}
// Check whether this frame is positioned at return. If not top
// frame or if the frame is optimized it cannot be at a return.
bool at_return = false;
if (!is_optimized && index == 0) {
at_return = isolate->debug()->IsBreakAtReturn(it.frame());
}
// If positioned just before return find the value to be returned and add it
// to the frame information.
Handle<Object> return_value = isolate->factory()->undefined_value();
if (at_return) {
StackFrameIterator it2(isolate);
Address internal_frame_sp = NULL;
while (!it2.done()) {
if (it2.frame()->is_internal()) {
internal_frame_sp = it2.frame()->sp();
} else {
if (it2.frame()->is_java_script()) {
if (it2.frame()->id() == it.frame()->id()) {
// The internal frame just before the JavaScript frame contains the
// value to return on top. A debug break at return will create an
// internal frame to store the return value (eax/rax/r0) before
// entering the debug break exit frame.
if (internal_frame_sp != NULL) {
return_value =
Handle<Object>(Memory::Object_at(internal_frame_sp),
isolate);
break;
}
}
}
// Indicate that the previous frame was not an internal frame.
internal_frame_sp = NULL;
}
it2.Advance();
}
}
// Now advance to the arguments adapter frame (if any). It contains all
// the provided parameters whereas the function frame always have the number
// of arguments matching the functions parameters. The rest of the
// information (except for what is collected above) is the same.
if ((inlined_jsframe_index == 0) && it.frame()->has_adapted_arguments()) {
it.AdvanceToArgumentsFrame();
frame_inspector.SetArgumentsFrame(it.frame());
}
// Find the number of arguments to fill. At least fill the number of
// parameters for the function and fill more if more parameters are provided.
int argument_count = scope_info->ParameterCount();
if (argument_count < frame_inspector.GetParametersCount()) {
argument_count = frame_inspector.GetParametersCount();
}
// Calculate the size of the result.
int details_size = kFrameDetailsFirstDynamicIndex +
2 * (argument_count + local_count) +
(at_return ? 1 : 0);
Handle<FixedArray> details = isolate->factory()->NewFixedArray(details_size);
// Add the frame id.
details->set(kFrameDetailsFrameIdIndex, *frame_id);
// Add the function (same as in function frame).
details->set(kFrameDetailsFunctionIndex, frame_inspector.GetFunction());
// Add the arguments count.
details->set(kFrameDetailsArgumentCountIndex, Smi::FromInt(argument_count));
// Add the locals count
details->set(kFrameDetailsLocalCountIndex,
Smi::FromInt(local_count));
// Add the source position.
if (position != RelocInfo::kNoPosition) {
details->set(kFrameDetailsSourcePositionIndex, Smi::FromInt(position));
} else {
details->set(kFrameDetailsSourcePositionIndex, heap->undefined_value());
}
// Add the constructor information.
details->set(kFrameDetailsConstructCallIndex, heap->ToBoolean(constructor));
// Add the at return information.
details->set(kFrameDetailsAtReturnIndex, heap->ToBoolean(at_return));
// Add flags to indicate information on whether this frame is
// bit 0: invoked in the debugger context.
// bit 1: optimized frame.
// bit 2: inlined in optimized frame
int flags = 0;
if (*save->context() == *isolate->debug()->debug_context()) {
flags |= 1 << 0;
}
if (is_optimized) {
flags |= 1 << 1;
flags |= inlined_jsframe_index << 2;
}
details->set(kFrameDetailsFlagsIndex, Smi::FromInt(flags));
// Fill the dynamic part.
int details_index = kFrameDetailsFirstDynamicIndex;
// Add arguments name and value.
for (int i = 0; i < argument_count; i++) {
// Name of the argument.
if (i < scope_info->ParameterCount()) {
details->set(details_index++, scope_info->ParameterName(i));
} else {
details->set(details_index++, heap->undefined_value());
}
// Parameter value.
if (i < frame_inspector.GetParametersCount()) {
// Get the value from the stack.
details->set(details_index++, frame_inspector.GetParameter(i));
} else {
details->set(details_index++, heap->undefined_value());
}
}
// Add locals name and value from the temporary copy from the function frame.
for (int i = 0; i < local_count * 2; i++) {
details->set(details_index++, locals->get(i));
}
// Add the value being returned.
if (at_return) {
details->set(details_index++, *return_value);
}
// Add the receiver (same as in function frame).
// THIS MUST BE DONE LAST SINCE WE MIGHT ADVANCE
// THE FRAME ITERATOR TO WRAP THE RECEIVER.
Handle<Object> receiver(it.frame()->receiver(), isolate);
if (!receiver->IsJSObject() &&
shared->strict_mode() == SLOPPY &&
!function->IsBuiltin()) {
// If the receiver is not a JSObject and the function is not a
// builtin or strict-mode we have hit an optimization where a
// value object is not converted into a wrapped JS objects. To
// hide this optimization from the debugger, we wrap the receiver
// by creating correct wrapper object based on the calling frame's
// native context.
it.Advance();
if (receiver->IsUndefined()) {
receiver = handle(function->global_proxy());
} else {
Context* context = Context::cast(it.frame()->context());
Handle<Context> native_context(Context::cast(context->native_context()));
if (!Object::ToObject(isolate, receiver, native_context)
.ToHandle(&receiver)) {
// This only happens if the receiver is forcibly set in %_CallFunction.
return heap->undefined_value();
}
}
}
details->set(kFrameDetailsReceiverIndex, *receiver);
DCHECK_EQ(details_size, details_index);
return *isolate->factory()->NewJSArrayWithElements(details);
}
static bool ParameterIsShadowedByContextLocal(Handle<ScopeInfo> info,
Handle<String> parameter_name) {
VariableMode mode;
InitializationFlag init_flag;
MaybeAssignedFlag maybe_assigned_flag;
return ScopeInfo::ContextSlotIndex(info, parameter_name, &mode, &init_flag,
&maybe_assigned_flag) != -1;
}
// Create a plain JSObject which materializes the local scope for the specified
// frame.
MUST_USE_RESULT
static MaybeHandle<JSObject> MaterializeStackLocalsWithFrameInspector(
Isolate* isolate,
Handle<JSObject> target,
Handle<JSFunction> function,
FrameInspector* frame_inspector) {
Handle<SharedFunctionInfo> shared(function->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
// First fill all parameters.
for (int i = 0; i < scope_info->ParameterCount(); ++i) {
// Do not materialize the parameter if it is shadowed by a context local.
Handle<String> name(scope_info->ParameterName(i));
if (ParameterIsShadowedByContextLocal(scope_info, name)) continue;
HandleScope scope(isolate);
Handle<Object> value(i < frame_inspector->GetParametersCount()
? frame_inspector->GetParameter(i)
: isolate->heap()->undefined_value(),
isolate);
DCHECK(!value->IsTheHole());
RETURN_ON_EXCEPTION(
isolate,
Runtime::SetObjectProperty(isolate, target, name, value, SLOPPY),
JSObject);
}
// Second fill all stack locals.
for (int i = 0; i < scope_info->StackLocalCount(); ++i) {
if (scope_info->LocalIsSynthetic(i)) continue;
Handle<String> name(scope_info->StackLocalName(i));
Handle<Object> value(frame_inspector->GetExpression(i), isolate);
if (value->IsTheHole()) continue;
RETURN_ON_EXCEPTION(
isolate,
Runtime::SetObjectProperty(isolate, target, name, value, SLOPPY),
JSObject);
}
return target;
}
static void UpdateStackLocalsFromMaterializedObject(Isolate* isolate,
Handle<JSObject> target,
Handle<JSFunction> function,
JavaScriptFrame* frame,
int inlined_jsframe_index) {
if (inlined_jsframe_index != 0 || frame->is_optimized()) {
// Optimized frames are not supported.
// TODO(yangguo): make sure all code deoptimized when debugger is active
// and assert that this cannot happen.
return;
}
Handle<SharedFunctionInfo> shared(function->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
// Parameters.
for (int i = 0; i < scope_info->ParameterCount(); ++i) {
// Shadowed parameters were not materialized.
Handle<String> name(scope_info->ParameterName(i));
if (ParameterIsShadowedByContextLocal(scope_info, name)) continue;
DCHECK(!frame->GetParameter(i)->IsTheHole());
HandleScope scope(isolate);
Handle<Object> value =
Object::GetPropertyOrElement(target, name).ToHandleChecked();
frame->SetParameterValue(i, *value);
}
// Stack locals.
for (int i = 0; i < scope_info->StackLocalCount(); ++i) {
if (scope_info->LocalIsSynthetic(i)) continue;
if (frame->GetExpression(i)->IsTheHole()) continue;
HandleScope scope(isolate);
Handle<Object> value = Object::GetPropertyOrElement(
target,
handle(scope_info->StackLocalName(i), isolate)).ToHandleChecked();
frame->SetExpression(i, *value);
}
}
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeLocalContext(
Isolate* isolate,
Handle<JSObject> target,
Handle<JSFunction> function,
JavaScriptFrame* frame) {
HandleScope scope(isolate);
Handle<SharedFunctionInfo> shared(function->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
if (!scope_info->HasContext()) return target;
// Third fill all context locals.
Handle<Context> frame_context(Context::cast(frame->context()));
Handle<Context> function_context(frame_context->declaration_context());
if (!ScopeInfo::CopyContextLocalsToScopeObject(
scope_info, function_context, target)) {
return MaybeHandle<JSObject>();
}
// Finally copy any properties from the function context extension.
// These will be variables introduced by eval.
if (function_context->closure() == *function) {
if (function_context->has_extension() &&
!function_context->IsNativeContext()) {
Handle<JSObject> ext(JSObject::cast(function_context->extension()));
Handle<FixedArray> keys;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, keys,
JSReceiver::GetKeys(ext, JSReceiver::INCLUDE_PROTOS),
JSObject);
for (int i = 0; i < keys->length(); i++) {
// Names of variables introduced by eval are strings.
DCHECK(keys->get(i)->IsString());
Handle<String> key(String::cast(keys->get(i)));
Handle<Object> value;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, value, Object::GetPropertyOrElement(ext, key), JSObject);
RETURN_ON_EXCEPTION(
isolate,
Runtime::SetObjectProperty(isolate, target, key, value, SLOPPY),
JSObject);
}
}
}
return target;
}
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeLocalScope(
Isolate* isolate,
JavaScriptFrame* frame,
int inlined_jsframe_index) {
FrameInspector frame_inspector(frame, inlined_jsframe_index, isolate);
Handle<JSFunction> function(JSFunction::cast(frame_inspector.GetFunction()));
Handle<JSObject> local_scope =
isolate->factory()->NewJSObject(isolate->object_function());
ASSIGN_RETURN_ON_EXCEPTION(
isolate, local_scope,
MaterializeStackLocalsWithFrameInspector(
isolate, local_scope, function, &frame_inspector),
JSObject);
return MaterializeLocalContext(isolate, local_scope, function, frame);
}
// Set the context local variable value.
static bool SetContextLocalValue(Isolate* isolate,
Handle<ScopeInfo> scope_info,
Handle<Context> context,
Handle<String> variable_name,
Handle<Object> new_value) {
for (int i = 0; i < scope_info->ContextLocalCount(); i++) {
Handle<String> next_name(scope_info->ContextLocalName(i));
if (String::Equals(variable_name, next_name)) {
VariableMode mode;
InitializationFlag init_flag;
MaybeAssignedFlag maybe_assigned_flag;
int context_index = ScopeInfo::ContextSlotIndex(
scope_info, next_name, &mode, &init_flag, &maybe_assigned_flag);
context->set(context_index, *new_value);
return true;
}
}
return false;
}
static bool SetLocalVariableValue(Isolate* isolate,
JavaScriptFrame* frame,
int inlined_jsframe_index,
Handle<String> variable_name,
Handle<Object> new_value) {
if (inlined_jsframe_index != 0 || frame->is_optimized()) {
// Optimized frames are not supported.
return false;
}
Handle<JSFunction> function(frame->function());
Handle<SharedFunctionInfo> shared(function->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
bool default_result = false;
// Parameters.
for (int i = 0; i < scope_info->ParameterCount(); ++i) {
HandleScope scope(isolate);
if (String::Equals(handle(scope_info->ParameterName(i)), variable_name)) {
frame->SetParameterValue(i, *new_value);
// Argument might be shadowed in heap context, don't stop here.
default_result = true;
}
}
// Stack locals.
for (int i = 0; i < scope_info->StackLocalCount(); ++i) {
HandleScope scope(isolate);
if (String::Equals(handle(scope_info->StackLocalName(i)), variable_name)) {
frame->SetExpression(i, *new_value);
return true;
}
}
if (scope_info->HasContext()) {
// Context locals.
Handle<Context> frame_context(Context::cast(frame->context()));
Handle<Context> function_context(frame_context->declaration_context());
if (SetContextLocalValue(
isolate, scope_info, function_context, variable_name, new_value)) {
return true;
}
// Function context extension. These are variables introduced by eval.
if (function_context->closure() == *function) {
if (function_context->has_extension() &&
!function_context->IsNativeContext()) {
Handle<JSObject> ext(JSObject::cast(function_context->extension()));
Maybe<bool> maybe = JSReceiver::HasProperty(ext, variable_name);
DCHECK(maybe.has_value);
if (maybe.value) {
// We don't expect this to do anything except replacing
// property value.
Runtime::SetObjectProperty(isolate, ext, variable_name, new_value,
SLOPPY).Assert();
return true;
}
}
}
}
return default_result;
}
// Create a plain JSObject which materializes the closure content for the
// context.
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeClosure(
Isolate* isolate,
Handle<Context> context) {
DCHECK(context->IsFunctionContext());
Handle<SharedFunctionInfo> shared(context->closure()->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
// Allocate and initialize a JSObject with all the content of this function
// closure.
Handle<JSObject> closure_scope =
isolate->factory()->NewJSObject(isolate->object_function());
// Fill all context locals to the context extension.
if (!ScopeInfo::CopyContextLocalsToScopeObject(
scope_info, context, closure_scope)) {
return MaybeHandle<JSObject>();
}
// Finally copy any properties from the function context extension. This will
// be variables introduced by eval.
if (context->has_extension()) {
Handle<JSObject> ext(JSObject::cast(context->extension()));
Handle<FixedArray> keys;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, keys,
JSReceiver::GetKeys(ext, JSReceiver::INCLUDE_PROTOS), JSObject);
for (int i = 0; i < keys->length(); i++) {
HandleScope scope(isolate);
// Names of variables introduced by eval are strings.
DCHECK(keys->get(i)->IsString());
Handle<String> key(String::cast(keys->get(i)));
Handle<Object> value;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, value, Object::GetPropertyOrElement(ext, key), JSObject);
RETURN_ON_EXCEPTION(
isolate,
Runtime::DefineObjectProperty(closure_scope, key, value, NONE),
JSObject);
}
}
return closure_scope;
}
// This method copies structure of MaterializeClosure method above.
static bool SetClosureVariableValue(Isolate* isolate,
Handle<Context> context,
Handle<String> variable_name,
Handle<Object> new_value) {
DCHECK(context->IsFunctionContext());
Handle<SharedFunctionInfo> shared(context->closure()->shared());
Handle<ScopeInfo> scope_info(shared->scope_info());
// Context locals to the context extension.
if (SetContextLocalValue(
isolate, scope_info, context, variable_name, new_value)) {
return true;
}
// Properties from the function context extension. This will
// be variables introduced by eval.
if (context->has_extension()) {
Handle<JSObject> ext(JSObject::cast(context->extension()));
Maybe<bool> maybe = JSReceiver::HasProperty(ext, variable_name);
DCHECK(maybe.has_value);
if (maybe.value) {
// We don't expect this to do anything except replacing property value.
Runtime::DefineObjectProperty(
ext, variable_name, new_value, NONE).Assert();
return true;
}
}
return false;
}
// Create a plain JSObject which materializes the scope for the specified
// catch context.
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeCatchScope(
Isolate* isolate,
Handle<Context> context) {
DCHECK(context->IsCatchContext());
Handle<String> name(String::cast(context->extension()));
Handle<Object> thrown_object(context->get(Context::THROWN_OBJECT_INDEX),
isolate);
Handle<JSObject> catch_scope =
isolate->factory()->NewJSObject(isolate->object_function());
RETURN_ON_EXCEPTION(
isolate,
Runtime::DefineObjectProperty(catch_scope, name, thrown_object, NONE),
JSObject);
return catch_scope;
}
static bool SetCatchVariableValue(Isolate* isolate,
Handle<Context> context,
Handle<String> variable_name,
Handle<Object> new_value) {
DCHECK(context->IsCatchContext());
Handle<String> name(String::cast(context->extension()));
if (!String::Equals(name, variable_name)) {
return false;
}
context->set(Context::THROWN_OBJECT_INDEX, *new_value);
return true;
}
// Create a plain JSObject which materializes the block scope for the specified
// block context.
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeBlockScope(
Isolate* isolate,
Handle<Context> context) {
DCHECK(context->IsBlockContext());
Handle<ScopeInfo> scope_info(ScopeInfo::cast(context->extension()));
// Allocate and initialize a JSObject with all the arguments, stack locals
// heap locals and extension properties of the debugged function.
Handle<JSObject> block_scope =
isolate->factory()->NewJSObject(isolate->object_function());
// Fill all context locals.
if (!ScopeInfo::CopyContextLocalsToScopeObject(
scope_info, context, block_scope)) {
return MaybeHandle<JSObject>();
}
return block_scope;
}
// Create a plain JSObject which materializes the module scope for the specified
// module context.
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeModuleScope(
Isolate* isolate,
Handle<Context> context) {
DCHECK(context->IsModuleContext());
Handle<ScopeInfo> scope_info(ScopeInfo::cast(context->extension()));
// Allocate and initialize a JSObject with all the members of the debugged
// module.
Handle<JSObject> module_scope =
isolate->factory()->NewJSObject(isolate->object_function());
// Fill all context locals.
if (!ScopeInfo::CopyContextLocalsToScopeObject(
scope_info, context, module_scope)) {
return MaybeHandle<JSObject>();
}
return module_scope;
}
// Iterate over the actual scopes visible from a stack frame or from a closure.
// The iteration proceeds from the innermost visible nested scope outwards.
// All scopes are backed by an actual context except the local scope,
// which is inserted "artificially" in the context chain.
class ScopeIterator {
public:
enum ScopeType {
ScopeTypeGlobal = 0,
ScopeTypeLocal,
ScopeTypeWith,
ScopeTypeClosure,
ScopeTypeCatch,
ScopeTypeBlock,
ScopeTypeModule
};
ScopeIterator(Isolate* isolate,
JavaScriptFrame* frame,
int inlined_jsframe_index,
bool ignore_nested_scopes = false)
: isolate_(isolate),
frame_(frame),
inlined_jsframe_index_(inlined_jsframe_index),
function_(frame->function()),
context_(Context::cast(frame->context())),
nested_scope_chain_(4),
failed_(false) {
// Catch the case when the debugger stops in an internal function.
Handle<SharedFunctionInfo> shared_info(function_->shared());
Handle<ScopeInfo> scope_info(shared_info->scope_info());
if (shared_info->script() == isolate->heap()->undefined_value()) {
while (context_->closure() == *function_) {
context_ = Handle<Context>(context_->previous(), isolate_);
}
return;
}
// Get the debug info (create it if it does not exist).
if (!isolate->debug()->EnsureDebugInfo(shared_info, function_)) {
// Return if ensuring debug info failed.
return;
}
// Currently it takes too much time to find nested scopes due to script
// parsing. Sometimes we want to run the ScopeIterator as fast as possible
// (for example, while collecting async call stacks on every
// addEventListener call), even if we drop some nested scopes.
// Later we may optimize getting the nested scopes (cache the result?)
// and include nested scopes into the "fast" iteration case as well.
if (!ignore_nested_scopes) {
Handle<DebugInfo> debug_info = Debug::GetDebugInfo(shared_info);
// Find the break point where execution has stopped.
BreakLocationIterator break_location_iterator(debug_info,
ALL_BREAK_LOCATIONS);
// pc points to the instruction after the current one, possibly a break
// location as well. So the "- 1" to exclude it from the search.
break_location_iterator.FindBreakLocationFromAddress(frame->pc() - 1);
// Within the return sequence at the moment it is not possible to
// get a source position which is consistent with the current scope chain.
// Thus all nested with, catch and block contexts are skipped and we only
// provide the function scope.
ignore_nested_scopes = break_location_iterator.IsExit();
}
if (ignore_nested_scopes) {
if (scope_info->HasContext()) {
context_ = Handle<Context>(context_->declaration_context(), isolate_);
} else {
while (context_->closure() == *function_) {
context_ = Handle<Context>(context_->previous(), isolate_);
}
}
if (scope_info->scope_type() == FUNCTION_SCOPE) {
nested_scope_chain_.Add(scope_info);
}
} else {
// Reparse the code and analyze the scopes.
Handle<Script> script(Script::cast(shared_info->script()));
Scope* scope = NULL;
// Check whether we are in global, eval or function code.
Handle<ScopeInfo> scope_info(shared_info->scope_info());
if (scope_info->scope_type() != FUNCTION_SCOPE) {
// Global or eval code.
CompilationInfoWithZone info(script);
if (scope_info->scope_type() == GLOBAL_SCOPE) {
info.MarkAsGlobal();
} else {
DCHECK(scope_info->scope_type() == EVAL_SCOPE);
info.MarkAsEval();
info.SetContext(Handle<Context>(function_->context()));
}
if (Parser::Parse(&info) && Scope::Analyze(&info)) {
scope = info.function()->scope();
}
RetrieveScopeChain(scope, shared_info);
} else {
// Function code
CompilationInfoWithZone info(shared_info);
if (Parser::Parse(&info) && Scope::Analyze(&info)) {
scope = info.function()->scope();
}
RetrieveScopeChain(scope, shared_info);
}
}
}
ScopeIterator(Isolate* isolate,
Handle<JSFunction> function)
: isolate_(isolate),
frame_(NULL),
inlined_jsframe_index_(0),
function_(function),
context_(function->context()),
failed_(false) {
if (function->IsBuiltin()) {
context_ = Handle<Context>();
}
}
// More scopes?
bool Done() {
DCHECK(!failed_);
return context_.is_null();
}
bool Failed() { return failed_; }
// Move to the next scope.
void Next() {
DCHECK(!failed_);
ScopeType scope_type = Type();
if (scope_type == ScopeTypeGlobal) {
// The global scope is always the last in the chain.
DCHECK(context_->IsNativeContext());
context_ = Handle<Context>();
return;
}
if (nested_scope_chain_.is_empty()) {
context_ = Handle<Context>(context_->previous(), isolate_);
} else {
if (nested_scope_chain_.last()->HasContext()) {
DCHECK(context_->previous() != NULL);
context_ = Handle<Context>(context_->previous(), isolate_);
}
nested_scope_chain_.RemoveLast();
}
}
// Return the type of the current scope.
ScopeType Type() {
DCHECK(!failed_);
if (!nested_scope_chain_.is_empty()) {
Handle<ScopeInfo> scope_info = nested_scope_chain_.last();
switch (scope_info->scope_type()) {
case FUNCTION_SCOPE:
DCHECK(context_->IsFunctionContext() ||
!scope_info->HasContext());
return ScopeTypeLocal;
case MODULE_SCOPE:
DCHECK(context_->IsModuleContext());
return ScopeTypeModule;
case GLOBAL_SCOPE:
DCHECK(context_->IsNativeContext());
return ScopeTypeGlobal;
case WITH_SCOPE:
DCHECK(context_->IsWithContext());
return ScopeTypeWith;
case CATCH_SCOPE:
DCHECK(context_->IsCatchContext());
return ScopeTypeCatch;
case BLOCK_SCOPE:
DCHECK(!scope_info->HasContext() ||
context_->IsBlockContext());
return ScopeTypeBlock;
case EVAL_SCOPE:
UNREACHABLE();
}
}
if (context_->IsNativeContext()) {
DCHECK(context_->global_object()->IsGlobalObject());
return ScopeTypeGlobal;
}
if (context_->IsFunctionContext()) {
return ScopeTypeClosure;
}
if (context_->IsCatchContext()) {
return ScopeTypeCatch;
}
if (context_->IsBlockContext()) {
return ScopeTypeBlock;
}
if (context_->IsModuleContext()) {
return ScopeTypeModule;
}
DCHECK(context_->IsWithContext());
return ScopeTypeWith;
}
// Return the JavaScript object with the content of the current scope.
MaybeHandle<JSObject> ScopeObject() {
DCHECK(!failed_);
switch (Type()) {
case ScopeIterator::ScopeTypeGlobal:
return Handle<JSObject>(CurrentContext()->global_object());
case ScopeIterator::ScopeTypeLocal:
// Materialize the content of the local scope into a JSObject.
DCHECK(nested_scope_chain_.length() == 1);
return MaterializeLocalScope(isolate_, frame_, inlined_jsframe_index_);
case ScopeIterator::ScopeTypeWith:
// Return the with object.
return Handle<JSObject>(JSObject::cast(CurrentContext()->extension()));
case ScopeIterator::ScopeTypeCatch:
return MaterializeCatchScope(isolate_, CurrentContext());
case ScopeIterator::ScopeTypeClosure:
// Materialize the content of the closure scope into a JSObject.
return MaterializeClosure(isolate_, CurrentContext());
case ScopeIterator::ScopeTypeBlock:
return MaterializeBlockScope(isolate_, CurrentContext());
case ScopeIterator::ScopeTypeModule:
return MaterializeModuleScope(isolate_, CurrentContext());
}
UNREACHABLE();
return Handle<JSObject>();
}
bool SetVariableValue(Handle<String> variable_name,
Handle<Object> new_value) {
DCHECK(!failed_);
switch (Type()) {
case ScopeIterator::ScopeTypeGlobal:
break;
case ScopeIterator::ScopeTypeLocal:
return SetLocalVariableValue(isolate_, frame_, inlined_jsframe_index_,
variable_name, new_value);
case ScopeIterator::ScopeTypeWith:
break;
case ScopeIterator::ScopeTypeCatch:
return SetCatchVariableValue(isolate_, CurrentContext(),
variable_name, new_value);
case ScopeIterator::ScopeTypeClosure:
return SetClosureVariableValue(isolate_, CurrentContext(),
variable_name, new_value);
case ScopeIterator::ScopeTypeBlock:
// TODO(2399): should we implement it?
break;
case ScopeIterator::ScopeTypeModule:
// TODO(2399): should we implement it?
break;
}
return false;
}
Handle<ScopeInfo> CurrentScopeInfo() {
DCHECK(!failed_);
if (!nested_scope_chain_.is_empty()) {
return nested_scope_chain_.last();
} else if (context_->IsBlockContext()) {
return Handle<ScopeInfo>(ScopeInfo::cast(context_->extension()));
} else if (context_->IsFunctionContext()) {
return Handle<ScopeInfo>(context_->closure()->shared()->scope_info());
}
return Handle<ScopeInfo>::null();
}
// Return the context for this scope. For the local context there might not
// be an actual context.
Handle<Context> CurrentContext() {
DCHECK(!failed_);
if (Type() == ScopeTypeGlobal ||
nested_scope_chain_.is_empty()) {
return context_;
} else if (nested_scope_chain_.last()->HasContext()) {
return context_;
} else {
return Handle<Context>();
}
}
#ifdef DEBUG
// Debug print of the content of the current scope.
void DebugPrint() {
OFStream os(stdout);
DCHECK(!failed_);
switch (Type()) {
case ScopeIterator::ScopeTypeGlobal:
os << "Global:\n";
CurrentContext()->Print(os);
break;
case ScopeIterator::ScopeTypeLocal: {
os << "Local:\n";
function_->shared()->scope_info()->Print();
if (!CurrentContext().is_null()) {
CurrentContext()->Print(os);
if (CurrentContext()->has_extension()) {
Handle<Object> extension(CurrentContext()->extension(), isolate_);
if (extension->IsJSContextExtensionObject()) {
extension->Print(os);
}
}
}
break;
}
case ScopeIterator::ScopeTypeWith:
os << "With:\n";
CurrentContext()->extension()->Print(os);
break;
case ScopeIterator::ScopeTypeCatch:
os << "Catch:\n";
CurrentContext()->extension()->Print(os);
CurrentContext()->get(Context::THROWN_OBJECT_INDEX)->Print(os);
break;
case ScopeIterator::ScopeTypeClosure:
os << "Closure:\n";
CurrentContext()->Print(os);
if (CurrentContext()->has_extension()) {
Handle<Object> extension(CurrentContext()->extension(), isolate_);
if (extension->IsJSContextExtensionObject()) {
extension->Print(os);
}
}
break;
default:
UNREACHABLE();
}
PrintF("\n");
}
#endif
private:
Isolate* isolate_;
JavaScriptFrame* frame_;
int inlined_jsframe_index_;
Handle<JSFunction> function_;
Handle<Context> context_;
List<Handle<ScopeInfo> > nested_scope_chain_;
bool failed_;
void RetrieveScopeChain(Scope* scope,
Handle<SharedFunctionInfo> shared_info) {
if (scope != NULL) {
int source_position = shared_info->code()->SourcePosition(frame_->pc());
scope->GetNestedScopeChain(&nested_scope_chain_, source_position);
} else {
// A failed reparse indicates that the preparser has diverged from the
// parser or that the preparse data given to the initial parse has been
// faulty. We fail in debug mode but in release mode we only provide the
// information we get from the context chain but nothing about
// completely stack allocated scopes or stack allocated locals.
// Or it could be due to stack overflow.
DCHECK(isolate_->has_pending_exception());
failed_ = true;
}
}
DISALLOW_IMPLICIT_CONSTRUCTORS(ScopeIterator);
};
RUNTIME_FUNCTION(Runtime_GetScopeCount) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
// Get the frame where the debugging is performed.
StackFrame::Id id = UnwrapFrameId(wrapped_id);
JavaScriptFrameIterator it(isolate, id);
JavaScriptFrame* frame = it.frame();
// Count the visible scopes.
int n = 0;
for (ScopeIterator it(isolate, frame, 0);
!it.Done();
it.Next()) {
n++;
}
return Smi::FromInt(n);
}
// Returns the list of step-in positions (text offset) in a function of the
// stack frame in a range from the current debug break position to the end
// of the corresponding statement.
RUNTIME_FUNCTION(Runtime_GetStepInPositions) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
// Get the frame where the debugging is performed.
StackFrame::Id id = UnwrapFrameId(wrapped_id);
JavaScriptFrameIterator frame_it(isolate, id);
RUNTIME_ASSERT(!frame_it.done());
JavaScriptFrame* frame = frame_it.frame();
Handle<JSFunction> fun =
Handle<JSFunction>(frame->function());
Handle<SharedFunctionInfo> shared =
Handle<SharedFunctionInfo>(fun->shared());
if (!isolate->debug()->EnsureDebugInfo(shared, fun)) {
return isolate->heap()->undefined_value();
}
Handle<DebugInfo> debug_info = Debug::GetDebugInfo(shared);
int len = 0;
Handle<JSArray> array(isolate->factory()->NewJSArray(10));
// Find the break point where execution has stopped.
BreakLocationIterator break_location_iterator(debug_info,
ALL_BREAK_LOCATIONS);
break_location_iterator.FindBreakLocationFromAddress(frame->pc() - 1);
int current_statement_pos = break_location_iterator.statement_position();
while (!break_location_iterator.Done()) {
bool accept;
if (break_location_iterator.pc() > frame->pc()) {
accept = true;
} else {
StackFrame::Id break_frame_id = isolate->debug()->break_frame_id();
// The break point is near our pc. Could be a step-in possibility,
// that is currently taken by active debugger call.
if (break_frame_id == StackFrame::NO_ID) {
// We are not stepping.
accept = false;
} else {
JavaScriptFrameIterator additional_frame_it(isolate, break_frame_id);
// If our frame is a top frame and we are stepping, we can do step-in
// at this place.
accept = additional_frame_it.frame()->id() == id;
}
}
if (accept) {
if (break_location_iterator.IsStepInLocation(isolate)) {
Smi* position_value = Smi::FromInt(break_location_iterator.position());
RETURN_FAILURE_ON_EXCEPTION(
isolate,
JSObject::SetElement(array, len,
Handle<Object>(position_value, isolate),
NONE, SLOPPY));
len++;
}
}
// Advance iterator.
break_location_iterator.Next();
if (current_statement_pos !=
break_location_iterator.statement_position()) {
break;
}
}
return *array;
}
static const int kScopeDetailsTypeIndex = 0;
static const int kScopeDetailsObjectIndex = 1;
static const int kScopeDetailsSize = 2;
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeScopeDetails(
Isolate* isolate,
ScopeIterator* it) {
// Calculate the size of the result.
int details_size = kScopeDetailsSize;
Handle<FixedArray> details = isolate->factory()->NewFixedArray(details_size);
// Fill in scope details.
details->set(kScopeDetailsTypeIndex, Smi::FromInt(it->Type()));
Handle<JSObject> scope_object;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, scope_object, it->ScopeObject(), JSObject);
details->set(kScopeDetailsObjectIndex, *scope_object);
return isolate->factory()->NewJSArrayWithElements(details);
}
// Return an array with scope details
// args[0]: number: break id
// args[1]: number: frame index
// args[2]: number: inlined frame index
// args[3]: number: scope index
//
// The array returned contains the following information:
// 0: Scope type
// 1: Scope object
RUNTIME_FUNCTION(Runtime_GetScopeDetails) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
CONVERT_NUMBER_CHECKED(int, index, Int32, args[3]);
// Get the frame where the debugging is performed.
StackFrame::Id id = UnwrapFrameId(wrapped_id);
JavaScriptFrameIterator frame_it(isolate, id);
JavaScriptFrame* frame = frame_it.frame();
// Find the requested scope.
int n = 0;
ScopeIterator it(isolate, frame, inlined_jsframe_index);
for (; !it.Done() && n < index; it.Next()) {
n++;
}
if (it.Done()) {
return isolate->heap()->undefined_value();
}
Handle<JSObject> details;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, details, MaterializeScopeDetails(isolate, &it));
return *details;
}
// Return an array of scope details
// args[0]: number: break id
// args[1]: number: frame index
// args[2]: number: inlined frame index
// args[3]: boolean: ignore nested scopes
//
// The array returned contains arrays with the following information:
// 0: Scope type
// 1: Scope object
RUNTIME_FUNCTION(Runtime_GetAllScopesDetails) {
HandleScope scope(isolate);
DCHECK(args.length() == 3 || args.length() == 4);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
bool ignore_nested_scopes = false;
if (args.length() == 4) {
CONVERT_BOOLEAN_ARG_CHECKED(flag, 3);
ignore_nested_scopes = flag;
}
// Get the frame where the debugging is performed.
StackFrame::Id id = UnwrapFrameId(wrapped_id);
JavaScriptFrameIterator frame_it(isolate, id);
JavaScriptFrame* frame = frame_it.frame();
List<Handle<JSObject> > result(4);
ScopeIterator it(isolate, frame, inlined_jsframe_index, ignore_nested_scopes);
for (; !it.Done(); it.Next()) {
Handle<JSObject> details;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, details, MaterializeScopeDetails(isolate, &it));
result.Add(details);
}
Handle<FixedArray> array = isolate->factory()->NewFixedArray(result.length());
for (int i = 0; i < result.length(); ++i) {
array->set(i, *result[i]);
}
return *isolate->factory()->NewJSArrayWithElements(array);
}
RUNTIME_FUNCTION(Runtime_GetFunctionScopeCount) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
// Check arguments.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
// Count the visible scopes.
int n = 0;
for (ScopeIterator it(isolate, fun); !it.Done(); it.Next()) {
n++;
}
return Smi::FromInt(n);
}
RUNTIME_FUNCTION(Runtime_GetFunctionScopeDetails) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
// Check arguments.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
// Find the requested scope.
int n = 0;
ScopeIterator it(isolate, fun);
for (; !it.Done() && n < index; it.Next()) {
n++;
}
if (it.Done()) {
return isolate->heap()->undefined_value();
}
Handle<JSObject> details;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, details, MaterializeScopeDetails(isolate, &it));
return *details;
}
static bool SetScopeVariableValue(ScopeIterator* it, int index,
Handle<String> variable_name,
Handle<Object> new_value) {
for (int n = 0; !it->Done() && n < index; it->Next()) {
n++;
}
if (it->Done()) {
return false;
}
return it->SetVariableValue(variable_name, new_value);
}
// Change variable value in closure or local scope
// args[0]: number or JsFunction: break id or function
// args[1]: number: frame index (when arg[0] is break id)
// args[2]: number: inlined frame index (when arg[0] is break id)
// args[3]: number: scope index
// args[4]: string: variable name
// args[5]: object: new value
//
// Return true if success and false otherwise
RUNTIME_FUNCTION(Runtime_SetScopeVariableValue) {
HandleScope scope(isolate);
DCHECK(args.length() == 6);
// Check arguments.
CONVERT_NUMBER_CHECKED(int, index, Int32, args[3]);
CONVERT_ARG_HANDLE_CHECKED(String, variable_name, 4);
CONVERT_ARG_HANDLE_CHECKED(Object, new_value, 5);
bool res;
if (args[0]->IsNumber()) {
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
// Get the frame where the debugging is performed.
StackFrame::Id id = UnwrapFrameId(wrapped_id);
JavaScriptFrameIterator frame_it(isolate, id);
JavaScriptFrame* frame = frame_it.frame();
ScopeIterator it(isolate, frame, inlined_jsframe_index);
res = SetScopeVariableValue(&it, index, variable_name, new_value);
} else {
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
ScopeIterator it(isolate, fun);
res = SetScopeVariableValue(&it, index, variable_name, new_value);
}
return isolate->heap()->ToBoolean(res);
}
RUNTIME_FUNCTION(Runtime_DebugPrintScopes) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
#ifdef DEBUG
// Print the scopes for the top frame.
StackFrameLocator locator(isolate);
JavaScriptFrame* frame = locator.FindJavaScriptFrame(0);
for (ScopeIterator it(isolate, frame, 0);
!it.Done();
it.Next()) {
it.DebugPrint();
}
#endif
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetThreadCount) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
// Count all archived V8 threads.
int n = 0;
for (ThreadState* thread =
isolate->thread_manager()->FirstThreadStateInUse();
thread != NULL;
thread = thread->Next()) {
n++;
}
// Total number of threads is current thread and archived threads.
return Smi::FromInt(n + 1);
}
static const int kThreadDetailsCurrentThreadIndex = 0;
static const int kThreadDetailsThreadIdIndex = 1;
static const int kThreadDetailsSize = 2;
// Return an array with thread details
// args[0]: number: break id
// args[1]: number: thread index
//
// The array returned contains the following information:
// 0: Is current thread?
// 1: Thread id
RUNTIME_FUNCTION(Runtime_GetThreadDetails) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
// Allocate array for result.
Handle<FixedArray> details =
isolate->factory()->NewFixedArray(kThreadDetailsSize);
// Thread index 0 is current thread.
if (index == 0) {
// Fill the details.
details->set(kThreadDetailsCurrentThreadIndex,
isolate->heap()->true_value());
details->set(kThreadDetailsThreadIdIndex,
Smi::FromInt(ThreadId::Current().ToInteger()));
} else {
// Find the thread with the requested index.
int n = 1;
ThreadState* thread =
isolate->thread_manager()->FirstThreadStateInUse();
while (index != n && thread != NULL) {
thread = thread->Next();
n++;
}
if (thread == NULL) {
return isolate->heap()->undefined_value();
}
// Fill the details.
details->set(kThreadDetailsCurrentThreadIndex,
isolate->heap()->false_value());
details->set(kThreadDetailsThreadIdIndex,
Smi::FromInt(thread->id().ToInteger()));
}
// Convert to JS array and return.
return *isolate->factory()->NewJSArrayWithElements(details);
}
// Sets the disable break state
// args[0]: disable break state
RUNTIME_FUNCTION(Runtime_SetDisableBreak) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_BOOLEAN_ARG_CHECKED(disable_break, 0);
isolate->debug()->set_disable_break(disable_break);
return isolate->heap()->undefined_value();
}
static bool IsPositionAlignmentCodeCorrect(int alignment) {
return alignment == STATEMENT_ALIGNED || alignment == BREAK_POSITION_ALIGNED;
}
RUNTIME_FUNCTION(Runtime_GetBreakLocations) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
CONVERT_NUMBER_CHECKED(int32_t, statement_aligned_code, Int32, args[1]);
if (!IsPositionAlignmentCodeCorrect(statement_aligned_code)) {
return isolate->ThrowIllegalOperation();
}
BreakPositionAlignment alignment =
static_cast<BreakPositionAlignment>(statement_aligned_code);
Handle<SharedFunctionInfo> shared(fun->shared());
// Find the number of break points
Handle<Object> break_locations =
Debug::GetSourceBreakLocations(shared, alignment);
if (break_locations->IsUndefined()) return isolate->heap()->undefined_value();
// Return array as JS array
return *isolate->factory()->NewJSArrayWithElements(
Handle<FixedArray>::cast(break_locations));
}
// Set a break point in a function.
// args[0]: function
// args[1]: number: break source position (within the function source)
// args[2]: number: break point object
RUNTIME_FUNCTION(Runtime_SetFunctionBreakPoint) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
RUNTIME_ASSERT(source_position >= function->shared()->start_position() &&
source_position <= function->shared()->end_position());
CONVERT_ARG_HANDLE_CHECKED(Object, break_point_object_arg, 2);
// Set break point.
RUNTIME_ASSERT(isolate->debug()->SetBreakPoint(
function, break_point_object_arg, &source_position));
return Smi::FromInt(source_position);
}
// Changes the state of a break point in a script and returns source position
// where break point was set. NOTE: Regarding performance see the NOTE for
// GetScriptFromScriptData.
// args[0]: script to set break point in
// args[1]: number: break source position (within the script source)
// args[2]: number, breakpoint position alignment
// args[3]: number: break point object
RUNTIME_FUNCTION(Runtime_SetScriptBreakPoint) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_ARG_HANDLE_CHECKED(JSValue, wrapper, 0);
CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
RUNTIME_ASSERT(source_position >= 0);
CONVERT_NUMBER_CHECKED(int32_t, statement_aligned_code, Int32, args[2]);
CONVERT_ARG_HANDLE_CHECKED(Object, break_point_object_arg, 3);
if (!IsPositionAlignmentCodeCorrect(statement_aligned_code)) {
return isolate->ThrowIllegalOperation();
}
BreakPositionAlignment alignment =
static_cast<BreakPositionAlignment>(statement_aligned_code);
// Get the script from the script wrapper.
RUNTIME_ASSERT(wrapper->value()->IsScript());
Handle<Script> script(Script::cast(wrapper->value()));
// Set break point.
if (!isolate->debug()->SetBreakPointForScript(script, break_point_object_arg,
&source_position,
alignment)) {
return isolate->heap()->undefined_value();
}
return Smi::FromInt(source_position);
}
// Clear a break point
// args[0]: number: break point object
RUNTIME_FUNCTION(Runtime_ClearBreakPoint) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, break_point_object_arg, 0);
// Clear break point.
isolate->debug()->ClearBreakPoint(break_point_object_arg);
return isolate->heap()->undefined_value();
}
// Change the state of break on exceptions.
// args[0]: Enum value indicating whether to affect caught/uncaught exceptions.
// args[1]: Boolean indicating on/off.
RUNTIME_FUNCTION(Runtime_ChangeBreakOnException) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(uint32_t, type_arg, Uint32, args[0]);
CONVERT_BOOLEAN_ARG_CHECKED(enable, 1);
// If the number doesn't match an enum value, the ChangeBreakOnException
// function will default to affecting caught exceptions.
ExceptionBreakType type = static_cast<ExceptionBreakType>(type_arg);
// Update break point state.
isolate->debug()->ChangeBreakOnException(type, enable);
return isolate->heap()->undefined_value();
}
// Returns the state of break on exceptions
// args[0]: boolean indicating uncaught exceptions
RUNTIME_FUNCTION(Runtime_IsBreakOnException) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_NUMBER_CHECKED(uint32_t, type_arg, Uint32, args[0]);
ExceptionBreakType type = static_cast<ExceptionBreakType>(type_arg);
bool result = isolate->debug()->IsBreakOnException(type);
return Smi::FromInt(result);
}
// Prepare for stepping
// args[0]: break id for checking execution state
// args[1]: step action from the enumeration StepAction
// args[2]: number of times to perform the step, for step out it is the number
// of frames to step down.
RUNTIME_FUNCTION(Runtime_PrepareStep) {
HandleScope scope(isolate);
DCHECK(args.length() == 4);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
if (!args[1]->IsNumber() || !args[2]->IsNumber()) {
return isolate->Throw(isolate->heap()->illegal_argument_string());
}
CONVERT_NUMBER_CHECKED(int, wrapped_frame_id, Int32, args[3]);
StackFrame::Id frame_id;
if (wrapped_frame_id == 0) {
frame_id = StackFrame::NO_ID;
} else {
frame_id = UnwrapFrameId(wrapped_frame_id);
}
// Get the step action and check validity.
StepAction step_action = static_cast<StepAction>(NumberToInt32(args[1]));
if (step_action != StepIn &&
step_action != StepNext &&
step_action != StepOut &&
step_action != StepInMin &&
step_action != StepMin) {
return isolate->Throw(isolate->heap()->illegal_argument_string());
}
if (frame_id != StackFrame::NO_ID && step_action != StepNext &&
step_action != StepMin && step_action != StepOut) {
return isolate->ThrowIllegalOperation();
}
// Get the number of steps.
int step_count = NumberToInt32(args[2]);
if (step_count < 1) {
return isolate->Throw(isolate->heap()->illegal_argument_string());
}
// Clear all current stepping setup.
isolate->debug()->ClearStepping();
// Prepare step.
isolate->debug()->PrepareStep(static_cast<StepAction>(step_action),
step_count,
frame_id);
return isolate->heap()->undefined_value();
}
// Clear all stepping set by PrepareStep.
RUNTIME_FUNCTION(Runtime_ClearStepping) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
isolate->debug()->ClearStepping();
return isolate->heap()->undefined_value();
}
// Helper function to find or create the arguments object for
// Runtime_DebugEvaluate.
MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeArgumentsObject(
Isolate* isolate,
Handle<JSObject> target,
Handle<JSFunction> function) {
// Do not materialize the arguments object for eval or top-level code.
// Skip if "arguments" is already taken.
if (!function->shared()->is_function()) return target;
Maybe<bool> maybe = JSReceiver::HasOwnProperty(
target, isolate->factory()->arguments_string());
if (!maybe.has_value) return MaybeHandle<JSObject>();
if (maybe.value) return target;
// FunctionGetArguments can't throw an exception.
Handle<JSObject> arguments = Handle<JSObject>::cast(
Accessors::FunctionGetArguments(function));
Handle<String> arguments_str = isolate->factory()->arguments_string();
RETURN_ON_EXCEPTION(
isolate,
Runtime::DefineObjectProperty(target, arguments_str, arguments, NONE),
JSObject);
return target;
}
// Compile and evaluate source for the given context.
static MaybeHandle<Object> DebugEvaluate(Isolate* isolate,
Handle<SharedFunctionInfo> outer_info,
Handle<Context> context,
Handle<Object> context_extension,
Handle<Object> receiver,
Handle<String> source) {
if (context_extension->IsJSObject()) {
Handle<JSObject> extension = Handle<JSObject>::cast(context_extension);
Handle<JSFunction> closure(context->closure(), isolate);
context = isolate->factory()->NewWithContext(closure, context, extension);
}
Handle<JSFunction> eval_fun;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, eval_fun,
Compiler::GetFunctionFromEval(source,
outer_info,
context,
SLOPPY,
NO_PARSE_RESTRICTION,
RelocInfo::kNoPosition),
Object);
Handle<Object> result;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, eval_fun, receiver, 0, NULL),
Object);
// Skip the global proxy as it has no properties and always delegates to the
// real global object.
if (result->IsJSGlobalProxy()) {
PrototypeIterator iter(isolate, result);
// TODO(verwaest): This will crash when the global proxy is detached.
result = Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter));
}
// Clear the oneshot breakpoints so that the debugger does not step further.
isolate->debug()->ClearStepping();
return result;
}
static Handle<JSObject> NewJSObjectWithNullProto(Isolate* isolate) {
Handle<JSObject> result =
isolate->factory()->NewJSObject(isolate->object_function());
Handle<Map> new_map = Map::Copy(Handle<Map>(result->map()));
new_map->set_prototype(*isolate->factory()->null_value());
JSObject::MigrateToMap(result, new_map);
return result;
}
// Evaluate a piece of JavaScript in the context of a stack frame for
// debugging. Things that need special attention are:
// - Parameters and stack-allocated locals need to be materialized. Altered
// values need to be written back to the stack afterwards.
// - The arguments object needs to materialized.
RUNTIME_FUNCTION(Runtime_DebugEvaluate) {
HandleScope scope(isolate);
// Check the execution state and decode arguments frame and source to be
// evaluated.
DCHECK(args.length() == 6);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
CONVERT_ARG_HANDLE_CHECKED(String, source, 3);
CONVERT_BOOLEAN_ARG_CHECKED(disable_break, 4);
CONVERT_ARG_HANDLE_CHECKED(Object, context_extension, 5);
// Handle the processing of break.
DisableBreak disable_break_scope(isolate->debug(), disable_break);
// Get the frame where the debugging is performed.
StackFrame::Id id = UnwrapFrameId(wrapped_id);
JavaScriptFrameIterator it(isolate, id);
JavaScriptFrame* frame = it.frame();
FrameInspector frame_inspector(frame, inlined_jsframe_index, isolate);
Handle<JSFunction> function(JSFunction::cast(frame_inspector.GetFunction()));
Handle<SharedFunctionInfo> outer_info(function->shared());
// Traverse the saved contexts chain to find the active context for the
// selected frame.
SaveContext* save = FindSavedContextForFrame(isolate, frame);
SaveContext savex(isolate);
isolate->set_context(*(save->context()));
// Evaluate on the context of the frame.
Handle<Context> context(Context::cast(frame_inspector.GetContext()));
DCHECK(!context.is_null());
// Materialize stack locals and the arguments object.
Handle<JSObject> materialized = NewJSObjectWithNullProto(isolate);
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, materialized,
MaterializeStackLocalsWithFrameInspector(
isolate, materialized, function, &frame_inspector));
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, materialized,
MaterializeArgumentsObject(isolate, materialized, function));
// Add the materialized object in a with-scope to shadow the stack locals.
context = isolate->factory()->NewWithContext(function, context, materialized);
Handle<Object> receiver(frame->receiver(), isolate);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
DebugEvaluate(isolate, outer_info,
context, context_extension, receiver, source));
// Write back potential changes to materialized stack locals to the stack.
UpdateStackLocalsFromMaterializedObject(
isolate, materialized, function, frame, inlined_jsframe_index);
return *result;
}
RUNTIME_FUNCTION(Runtime_DebugEvaluateGlobal) {
HandleScope scope(isolate);
// Check the execution state and decode arguments frame and source to be
// evaluated.
DCHECK(args.length() == 4);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
CONVERT_BOOLEAN_ARG_CHECKED(disable_break, 2);
CONVERT_ARG_HANDLE_CHECKED(Object, context_extension, 3);
// Handle the processing of break.
DisableBreak disable_break_scope(isolate->debug(), disable_break);
// Enter the top context from before the debugger was invoked.
SaveContext save(isolate);
SaveContext* top = &save;
while (top != NULL && *top->context() == *isolate->debug()->debug_context()) {
top = top->prev();
}
if (top != NULL) {
isolate->set_context(*top->context());
}
// Get the native context now set to the top context from before the
// debugger was invoked.
Handle<Context> context = isolate->native_context();
Handle<JSObject> receiver(context->global_proxy());
Handle<SharedFunctionInfo> outer_info(context->closure()->shared(), isolate);
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
DebugEvaluate(isolate, outer_info,
context, context_extension, receiver, source));
return *result;
}
RUNTIME_FUNCTION(Runtime_DebugGetLoadedScripts) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
// Fill the script objects.
Handle<FixedArray> instances = isolate->debug()->GetLoadedScripts();
// Convert the script objects to proper JS objects.
for (int i = 0; i < instances->length(); i++) {
Handle<Script> script = Handle<Script>(Script::cast(instances->get(i)));
// Get the script wrapper in a local handle before calling GetScriptWrapper,
// because using
// instances->set(i, *GetScriptWrapper(script))
// is unsafe as GetScriptWrapper might call GC and the C++ compiler might
// already have dereferenced the instances handle.
Handle<JSObject> wrapper = Script::GetWrapper(script);
instances->set(i, *wrapper);
}
// Return result as a JS array.
Handle<JSObject> result =
isolate->factory()->NewJSObject(isolate->array_function());
JSArray::SetContent(Handle<JSArray>::cast(result), instances);
return *result;
}
// Helper function used by Runtime_DebugReferencedBy below.
static int DebugReferencedBy(HeapIterator* iterator,
JSObject* target,
Object* instance_filter, int max_references,
FixedArray* instances, int instances_size,
JSFunction* arguments_function) {
Isolate* isolate = target->GetIsolate();
SealHandleScope shs(isolate);
DisallowHeapAllocation no_allocation;
// Iterate the heap.
int count = 0;
JSObject* last = NULL;
HeapObject* heap_obj = NULL;
while (((heap_obj = iterator->next()) != NULL) &&
(max_references == 0 || count < max_references)) {
// Only look at all JSObjects.
if (heap_obj->IsJSObject()) {
// Skip context extension objects and argument arrays as these are
// checked in the context of functions using them.
JSObject* obj = JSObject::cast(heap_obj);
if (obj->IsJSContextExtensionObject() ||
obj->map()->constructor() == arguments_function) {
continue;
}
// Check if the JS object has a reference to the object looked for.
if (obj->ReferencesObject(target)) {
// Check instance filter if supplied. This is normally used to avoid
// references from mirror objects (see Runtime_IsInPrototypeChain).
if (!instance_filter->IsUndefined()) {
for (PrototypeIterator iter(isolate, obj); !iter.IsAtEnd();
iter.Advance()) {
if (iter.GetCurrent() == instance_filter) {
obj = NULL; // Don't add this object.
break;
}
}
}
if (obj != NULL) {
// Valid reference found add to instance array if supplied an update
// count.
if (instances != NULL && count < instances_size) {
instances->set(count, obj);
}
last = obj;
count++;
}
}
}
}
// Check for circular reference only. This can happen when the object is only
// referenced from mirrors and has a circular reference in which case the
// object is not really alive and would have been garbage collected if not
// referenced from the mirror.
if (count == 1 && last == target) {
count = 0;
}
// Return the number of referencing objects found.
return count;
}
// Scan the heap for objects with direct references to an object
// args[0]: the object to find references to
// args[1]: constructor function for instances to exclude (Mirror)
// args[2]: the the maximum number of objects to return
RUNTIME_FUNCTION(Runtime_DebugReferencedBy) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
// Check parameters.
CONVERT_ARG_HANDLE_CHECKED(JSObject, target, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, instance_filter, 1);
RUNTIME_ASSERT(instance_filter->IsUndefined() ||
instance_filter->IsJSObject());
CONVERT_NUMBER_CHECKED(int32_t, max_references, Int32, args[2]);
RUNTIME_ASSERT(max_references >= 0);
// Get the constructor function for context extension and arguments array.
Handle<JSFunction> arguments_function(
JSFunction::cast(isolate->sloppy_arguments_map()->constructor()));
// Get the number of referencing objects.
int count;
// First perform a full GC in order to avoid dead objects and to make the heap
// iterable.
Heap* heap = isolate->heap();
heap->CollectAllGarbage(Heap::kMakeHeapIterableMask, "%DebugConstructedBy");
{
HeapIterator heap_iterator(heap);
count = DebugReferencedBy(&heap_iterator,
*target, *instance_filter, max_references,
NULL, 0, *arguments_function);
}
// Allocate an array to hold the result.
Handle<FixedArray> instances = isolate->factory()->NewFixedArray(count);
// Fill the referencing objects.
{
HeapIterator heap_iterator(heap);
count = DebugReferencedBy(&heap_iterator,
*target, *instance_filter, max_references,
*instances, count, *arguments_function);
}
// Return result as JS array.
Handle<JSFunction> constructor = isolate->array_function();
Handle<JSObject> result = isolate->factory()->NewJSObject(constructor);
JSArray::SetContent(Handle<JSArray>::cast(result), instances);
return *result;
}
// Helper function used by Runtime_DebugConstructedBy below.
static int DebugConstructedBy(HeapIterator* iterator,
JSFunction* constructor,
int max_references,
FixedArray* instances,
int instances_size) {
DisallowHeapAllocation no_allocation;
// Iterate the heap.
int count = 0;
HeapObject* heap_obj = NULL;
while (((heap_obj = iterator->next()) != NULL) &&
(max_references == 0 || count < max_references)) {
// Only look at all JSObjects.
if (heap_obj->IsJSObject()) {
JSObject* obj = JSObject::cast(heap_obj);
if (obj->map()->constructor() == constructor) {
// Valid reference found add to instance array if supplied an update
// count.
if (instances != NULL && count < instances_size) {
instances->set(count, obj);
}
count++;
}
}
}
// Return the number of referencing objects found.
return count;
}
// Scan the heap for objects constructed by a specific function.
// args[0]: the constructor to find instances of
// args[1]: the the maximum number of objects to return
RUNTIME_FUNCTION(Runtime_DebugConstructedBy) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
// Check parameters.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, 0);
CONVERT_NUMBER_CHECKED(int32_t, max_references, Int32, args[1]);
RUNTIME_ASSERT(max_references >= 0);
// Get the number of referencing objects.
int count;
// First perform a full GC in order to avoid dead objects and to make the heap
// iterable.
Heap* heap = isolate->heap();
heap->CollectAllGarbage(Heap::kMakeHeapIterableMask, "%DebugConstructedBy");
{
HeapIterator heap_iterator(heap);
count = DebugConstructedBy(&heap_iterator,
*constructor,
max_references,
NULL,
0);
}
// Allocate an array to hold the result.
Handle<FixedArray> instances = isolate->factory()->NewFixedArray(count);
// Fill the referencing objects.
{
HeapIterator heap_iterator2(heap);
count = DebugConstructedBy(&heap_iterator2,
*constructor,
max_references,
*instances,
count);
}
// Return result as JS array.
Handle<JSFunction> array_function = isolate->array_function();
Handle<JSObject> result = isolate->factory()->NewJSObject(array_function);
JSArray::SetContent(Handle<JSArray>::cast(result), instances);
return *result;
}
// Find the effective prototype object as returned by __proto__.
// args[0]: the object to find the prototype for.
RUNTIME_FUNCTION(Runtime_DebugGetPrototype) {
HandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, obj, 0);
return *GetPrototypeSkipHiddenPrototypes(isolate, obj);
}
// Patches script source (should be called upon BeforeCompile event).
RUNTIME_FUNCTION(Runtime_DebugSetScriptSource) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSValue, script_wrapper, 0);
CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
RUNTIME_ASSERT(script_wrapper->value()->IsScript());
Handle<Script> script(Script::cast(script_wrapper->value()));
int compilation_state = script->compilation_state();
RUNTIME_ASSERT(compilation_state == Script::COMPILATION_STATE_INITIAL);
script->set_source(*source);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_SystemBreak) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
base::OS::DebugBreak();
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugDisassembleFunction) {
HandleScope scope(isolate);
#ifdef DEBUG
DCHECK(args.length() == 1);
// Get the function and make sure it is compiled.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, func, 0);
if (!Compiler::EnsureCompiled(func, KEEP_EXCEPTION)) {
return isolate->heap()->exception();
}
OFStream os(stdout);
func->code()->Print(os);
os << endl;
#endif // DEBUG
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_DebugDisassembleConstructor) {
HandleScope scope(isolate);
#ifdef DEBUG
DCHECK(args.length() == 1);
// Get the function and make sure it is compiled.
CONVERT_ARG_HANDLE_CHECKED(JSFunction, func, 0);
if (!Compiler::EnsureCompiled(func, KEEP_EXCEPTION)) {
return isolate->heap()->exception();
}
OFStream os(stdout);
func->shared()->construct_stub()->Print(os);
os << endl;
#endif // DEBUG
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_FunctionGetInferredName) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSFunction, f, 0);
return f->shared()->inferred_name();
}
static int FindSharedFunctionInfosForScript(HeapIterator* iterator,
Script* script,
FixedArray* buffer) {
DisallowHeapAllocation no_allocation;
int counter = 0;
int buffer_size = buffer->length();
for (HeapObject* obj = iterator->next();
obj != NULL;
obj = iterator->next()) {
DCHECK(obj != NULL);
if (!obj->IsSharedFunctionInfo()) {
continue;
}
SharedFunctionInfo* shared = SharedFunctionInfo::cast(obj);
if (shared->script() != script) {
continue;
}
if (counter < buffer_size) {
buffer->set(counter, shared);
}
counter++;
}
return counter;
}
// For a script finds all SharedFunctionInfo's in the heap that points
// to this script. Returns JSArray of SharedFunctionInfo wrapped
// in OpaqueReferences.
RUNTIME_FUNCTION(Runtime_LiveEditFindSharedFunctionInfosForScript) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSValue, script_value, 0);
RUNTIME_ASSERT(script_value->value()->IsScript());
Handle<Script> script = Handle<Script>(Script::cast(script_value->value()));
const int kBufferSize = 32;
Handle<FixedArray> array;
array = isolate->factory()->NewFixedArray(kBufferSize);
int number;
Heap* heap = isolate->heap();
{
HeapIterator heap_iterator(heap);
Script* scr = *script;
FixedArray* arr = *array;
number = FindSharedFunctionInfosForScript(&heap_iterator, scr, arr);
}
if (number > kBufferSize) {
array = isolate->factory()->NewFixedArray(number);
HeapIterator heap_iterator(heap);
Script* scr = *script;
FixedArray* arr = *array;
FindSharedFunctionInfosForScript(&heap_iterator, scr, arr);
}
Handle<JSArray> result = isolate->factory()->NewJSArrayWithElements(array);
result->set_length(Smi::FromInt(number));
LiveEdit::WrapSharedFunctionInfos(result);
return *result;
}
// For a script calculates compilation information about all its functions.
// The script source is explicitly specified by the second argument.
// The source of the actual script is not used, however it is important that
// all generated code keeps references to this particular instance of script.
// Returns a JSArray of compilation infos. The array is ordered so that
// each function with all its descendant is always stored in a continues range
// with the function itself going first. The root function is a script function.
RUNTIME_FUNCTION(Runtime_LiveEditGatherCompileInfo) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSValue, script, 0);
CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
RUNTIME_ASSERT(script->value()->IsScript());
Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
Handle<JSArray> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result, LiveEdit::GatherCompileInfo(script_handle, source));
return *result;
}
// Changes the source of the script to a new_source.
// If old_script_name is provided (i.e. is a String), also creates a copy of
// the script with its original source and sends notification to debugger.
RUNTIME_FUNCTION(Runtime_LiveEditReplaceScript) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 3);
CONVERT_ARG_CHECKED(JSValue, original_script_value, 0);
CONVERT_ARG_HANDLE_CHECKED(String, new_source, 1);
CONVERT_ARG_HANDLE_CHECKED(Object, old_script_name, 2);
RUNTIME_ASSERT(original_script_value->value()->IsScript());
Handle<Script> original_script(Script::cast(original_script_value->value()));
Handle<Object> old_script = LiveEdit::ChangeScriptSource(
original_script, new_source, old_script_name);
if (old_script->IsScript()) {
Handle<Script> script_handle = Handle<Script>::cast(old_script);
return *Script::GetWrapper(script_handle);
} else {
return isolate->heap()->null_value();
}
}
RUNTIME_FUNCTION(Runtime_LiveEditFunctionSourceUpdated) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_info, 0);
RUNTIME_ASSERT(SharedInfoWrapper::IsInstance(shared_info));
LiveEdit::FunctionSourceUpdated(shared_info);
return isolate->heap()->undefined_value();
}
// Replaces code of SharedFunctionInfo with a new one.
RUNTIME_FUNCTION(Runtime_LiveEditReplaceFunctionCode) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, new_compile_info, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_info, 1);
RUNTIME_ASSERT(SharedInfoWrapper::IsInstance(shared_info));
LiveEdit::ReplaceFunctionCode(new_compile_info, shared_info);
return isolate->heap()->undefined_value();
}
// Connects SharedFunctionInfo to another script.
RUNTIME_FUNCTION(Runtime_LiveEditFunctionSetScript) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, function_object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, script_object, 1);
if (function_object->IsJSValue()) {
Handle<JSValue> function_wrapper = Handle<JSValue>::cast(function_object);
if (script_object->IsJSValue()) {
RUNTIME_ASSERT(JSValue::cast(*script_object)->value()->IsScript());
Script* script = Script::cast(JSValue::cast(*script_object)->value());
script_object = Handle<Object>(script, isolate);
}
RUNTIME_ASSERT(function_wrapper->value()->IsSharedFunctionInfo());
LiveEdit::SetFunctionScript(function_wrapper, script_object);
} else {
// Just ignore this. We may not have a SharedFunctionInfo for some functions
// and we check it in this function.
}
return isolate->heap()->undefined_value();
}
// In a code of a parent function replaces original function as embedded object
// with a substitution one.
RUNTIME_FUNCTION(Runtime_LiveEditReplaceRefToNestedFunction) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSValue, parent_wrapper, 0);
CONVERT_ARG_HANDLE_CHECKED(JSValue, orig_wrapper, 1);
CONVERT_ARG_HANDLE_CHECKED(JSValue, subst_wrapper, 2);
RUNTIME_ASSERT(parent_wrapper->value()->IsSharedFunctionInfo());
RUNTIME_ASSERT(orig_wrapper->value()->IsSharedFunctionInfo());
RUNTIME_ASSERT(subst_wrapper->value()->IsSharedFunctionInfo());
LiveEdit::ReplaceRefToNestedFunction(
parent_wrapper, orig_wrapper, subst_wrapper);
return isolate->heap()->undefined_value();
}
// Updates positions of a shared function info (first parameter) according
// to script source change. Text change is described in second parameter as
// array of groups of 3 numbers:
// (change_begin, change_end, change_end_new_position).
// Each group describes a change in text; groups are sorted by change_begin.
RUNTIME_FUNCTION(Runtime_LiveEditPatchFunctionPositions) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_array, 0);
CONVERT_ARG_HANDLE_CHECKED(JSArray, position_change_array, 1);
RUNTIME_ASSERT(SharedInfoWrapper::IsInstance(shared_array))
LiveEdit::PatchFunctionPositions(shared_array, position_change_array);
return isolate->heap()->undefined_value();
}
// For array of SharedFunctionInfo's (each wrapped in JSValue)
// checks that none of them have activations on stacks (of any thread).
// Returns array of the same length with corresponding results of
// LiveEdit::FunctionPatchabilityStatus type.
RUNTIME_FUNCTION(Runtime_LiveEditCheckAndDropActivations) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSArray, shared_array, 0);
CONVERT_BOOLEAN_ARG_CHECKED(do_drop, 1);
RUNTIME_ASSERT(shared_array->length()->IsSmi());
RUNTIME_ASSERT(shared_array->HasFastElements())
int array_length = Smi::cast(shared_array->length())->value();
for (int i = 0; i < array_length; i++) {
Handle<Object> element =
Object::GetElement(isolate, shared_array, i).ToHandleChecked();
RUNTIME_ASSERT(
element->IsJSValue() &&
Handle<JSValue>::cast(element)->value()->IsSharedFunctionInfo());
}
return *LiveEdit::CheckAndDropActivations(shared_array, do_drop);
}
// Compares 2 strings line-by-line, then token-wise and returns diff in form
// of JSArray of triplets (pos1, pos1_end, pos2_end) describing list
// of diff chunks.
RUNTIME_FUNCTION(Runtime_LiveEditCompareStrings) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, s1, 0);
CONVERT_ARG_HANDLE_CHECKED(String, s2, 1);
return *LiveEdit::CompareStrings(s1, s2);
}
// Restarts a call frame and completely drops all frames above.
// Returns true if successful. Otherwise returns undefined or an error message.
RUNTIME_FUNCTION(Runtime_LiveEditRestartFrame) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_NUMBER_CHECKED(int, break_id, Int32, args[0]);
RUNTIME_ASSERT(CheckExecutionState(isolate, break_id));
CONVERT_NUMBER_CHECKED(int, index, Int32, args[1]);
Heap* heap = isolate->heap();
// Find the relevant frame with the requested index.
StackFrame::Id id = isolate->debug()->break_frame_id();
if (id == StackFrame::NO_ID) {
// If there are no JavaScript stack frames return undefined.
return heap->undefined_value();
}
JavaScriptFrameIterator it(isolate, id);
int inlined_jsframe_index = FindIndexedNonNativeFrame(&it, index);
if (inlined_jsframe_index == -1) return heap->undefined_value();
// We don't really care what the inlined frame index is, since we are
// throwing away the entire frame anyways.
const char* error_message = LiveEdit::RestartFrame(it.frame());
if (error_message) {
return *(isolate->factory()->InternalizeUtf8String(error_message));
}
return heap->true_value();
}
// A testing entry. Returns statement position which is the closest to
// source_position.
RUNTIME_FUNCTION(Runtime_GetFunctionCodePositionFromSource) {
HandleScope scope(isolate);
CHECK(isolate->debug()->live_edit_enabled());
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
CONVERT_NUMBER_CHECKED(int32_t, source_position, Int32, args[1]);
Handle<Code> code(function->code(), isolate);
if (code->kind() != Code::FUNCTION &&
code->kind() != Code::OPTIMIZED_FUNCTION) {
return isolate->heap()->undefined_value();
}
RelocIterator it(*code, RelocInfo::ModeMask(RelocInfo::STATEMENT_POSITION));
int closest_pc = 0;
int distance = kMaxInt;
while (!it.done()) {
int statement_position = static_cast<int>(it.rinfo()->data());
// Check if this break point is closer that what was previously found.
if (source_position <= statement_position &&
statement_position - source_position < distance) {
closest_pc =
static_cast<int>(it.rinfo()->pc() - code->instruction_start());
distance = statement_position - source_position;
// Check whether we can't get any closer.
if (distance == 0) break;
}
it.next();
}
return Smi::FromInt(closest_pc);
}
// Calls specified function with or without entering the debugger.
// This is used in unit tests to run code as if debugger is entered or simply
// to have a stack with C++ frame in the middle.
RUNTIME_FUNCTION(Runtime_ExecuteInDebugContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
CONVERT_BOOLEAN_ARG_CHECKED(without_debugger, 1);
MaybeHandle<Object> maybe_result;
if (without_debugger) {
maybe_result = Execution::Call(isolate,
function,
handle(function->global_proxy()),
0,
NULL);
} else {
DebugScope debug_scope(isolate->debug());
maybe_result = Execution::Call(isolate,
function,
handle(function->global_proxy()),
0,
NULL);
}
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, maybe_result);
return *result;
}
// Sets a v8 flag.
RUNTIME_FUNCTION(Runtime_SetFlags) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(String, arg, 0);
SmartArrayPointer<char> flags =
arg->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
FlagList::SetFlagsFromString(flags.get(), StrLength(flags.get()));
return isolate->heap()->undefined_value();
}
// Performs a GC.
// Presently, it only does a full GC.
RUNTIME_FUNCTION(Runtime_CollectGarbage) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, "%CollectGarbage");
return isolate->heap()->undefined_value();
}
// Gets the current heap usage.
RUNTIME_FUNCTION(Runtime_GetHeapUsage) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
int usage = static_cast<int>(isolate->heap()->SizeOfObjects());
if (!Smi::IsValid(usage)) {
return *isolate->factory()->NewNumberFromInt(usage);
}
return Smi::FromInt(usage);
}
#ifdef V8_I18N_SUPPORT
RUNTIME_FUNCTION(Runtime_CanonicalizeLanguageTag) {
HandleScope scope(isolate);
Factory* factory = isolate->factory();
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, locale_id_str, 0);
v8::String::Utf8Value locale_id(v8::Utils::ToLocal(locale_id_str));
// Return value which denotes invalid language tag.
const char* const kInvalidTag = "invalid-tag";
UErrorCode error = U_ZERO_ERROR;
char icu_result[ULOC_FULLNAME_CAPACITY];
int icu_length = 0;
uloc_forLanguageTag(*locale_id, icu_result, ULOC_FULLNAME_CAPACITY,
&icu_length, &error);
if (U_FAILURE(error) || icu_length == 0) {
return *factory->NewStringFromAsciiChecked(kInvalidTag);
}
char result[ULOC_FULLNAME_CAPACITY];
// Force strict BCP47 rules.
uloc_toLanguageTag(icu_result, result, ULOC_FULLNAME_CAPACITY, TRUE, &error);
if (U_FAILURE(error)) {
return *factory->NewStringFromAsciiChecked(kInvalidTag);
}
return *factory->NewStringFromAsciiChecked(result);
}
RUNTIME_FUNCTION(Runtime_AvailableLocalesOf) {
HandleScope scope(isolate);
Factory* factory = isolate->factory();
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, service, 0);
const icu::Locale* available_locales = NULL;
int32_t count = 0;
if (service->IsUtf8EqualTo(CStrVector("collator"))) {
available_locales = icu::Collator::getAvailableLocales(count);
} else if (service->IsUtf8EqualTo(CStrVector("numberformat"))) {
available_locales = icu::NumberFormat::getAvailableLocales(count);
} else if (service->IsUtf8EqualTo(CStrVector("dateformat"))) {
available_locales = icu::DateFormat::getAvailableLocales(count);
} else if (service->IsUtf8EqualTo(CStrVector("breakiterator"))) {
available_locales = icu::BreakIterator::getAvailableLocales(count);
}
UErrorCode error = U_ZERO_ERROR;
char result[ULOC_FULLNAME_CAPACITY];
Handle<JSObject> locales =
factory->NewJSObject(isolate->object_function());
for (int32_t i = 0; i < count; ++i) {
const char* icu_name = available_locales[i].getName();
error = U_ZERO_ERROR;
// No need to force strict BCP47 rules.
uloc_toLanguageTag(icu_name, result, ULOC_FULLNAME_CAPACITY, FALSE, &error);
if (U_FAILURE(error)) {
// This shouldn't happen, but lets not break the user.
continue;
}
RETURN_FAILURE_ON_EXCEPTION(isolate,
JSObject::SetOwnPropertyIgnoreAttributes(
locales,
factory->NewStringFromAsciiChecked(result),
factory->NewNumber(i),
NONE));
}
return *locales;
}
RUNTIME_FUNCTION(Runtime_GetDefaultICULocale) {
HandleScope scope(isolate);
Factory* factory = isolate->factory();
DCHECK(args.length() == 0);
icu::Locale default_locale;
// Set the locale
char result[ULOC_FULLNAME_CAPACITY];
UErrorCode status = U_ZERO_ERROR;
uloc_toLanguageTag(
default_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
if (U_SUCCESS(status)) {
return *factory->NewStringFromAsciiChecked(result);
}
return *factory->NewStringFromStaticChars("und");
}
RUNTIME_FUNCTION(Runtime_GetLanguageTagVariants) {
HandleScope scope(isolate);
Factory* factory = isolate->factory();
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSArray, input, 0);
uint32_t length = static_cast<uint32_t>(input->length()->Number());
// Set some limit to prevent fuzz tests from going OOM.
// Can be bumped when callers' requirements change.
RUNTIME_ASSERT(length < 100);
Handle<FixedArray> output = factory->NewFixedArray(length);
Handle<Name> maximized = factory->NewStringFromStaticChars("maximized");
Handle<Name> base = factory->NewStringFromStaticChars("base");
for (unsigned int i = 0; i < length; ++i) {
Handle<Object> locale_id;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, locale_id, Object::GetElement(isolate, input, i));
if (!locale_id->IsString()) {
return isolate->Throw(*factory->illegal_argument_string());
}
v8::String::Utf8Value utf8_locale_id(
v8::Utils::ToLocal(Handle<String>::cast(locale_id)));
UErrorCode error = U_ZERO_ERROR;
// Convert from BCP47 to ICU format.
// de-DE-u-co-phonebk -> de_DE@collation=phonebook
char icu_locale[ULOC_FULLNAME_CAPACITY];
int icu_locale_length = 0;
uloc_forLanguageTag(*utf8_locale_id, icu_locale, ULOC_FULLNAME_CAPACITY,
&icu_locale_length, &error);
if (U_FAILURE(error) || icu_locale_length == 0) {
return isolate->Throw(*factory->illegal_argument_string());
}
// Maximize the locale.
// de_DE@collation=phonebook -> de_Latn_DE@collation=phonebook
char icu_max_locale[ULOC_FULLNAME_CAPACITY];
uloc_addLikelySubtags(
icu_locale, icu_max_locale, ULOC_FULLNAME_CAPACITY, &error);
// Remove extensions from maximized locale.
// de_Latn_DE@collation=phonebook -> de_Latn_DE
char icu_base_max_locale[ULOC_FULLNAME_CAPACITY];
uloc_getBaseName(
icu_max_locale, icu_base_max_locale, ULOC_FULLNAME_CAPACITY, &error);
// Get original name without extensions.
// de_DE@collation=phonebook -> de_DE
char icu_base_locale[ULOC_FULLNAME_CAPACITY];
uloc_getBaseName(
icu_locale, icu_base_locale, ULOC_FULLNAME_CAPACITY, &error);
// Convert from ICU locale format to BCP47 format.
// de_Latn_DE -> de-Latn-DE
char base_max_locale[ULOC_FULLNAME_CAPACITY];
uloc_toLanguageTag(icu_base_max_locale, base_max_locale,
ULOC_FULLNAME_CAPACITY, FALSE, &error);
// de_DE -> de-DE
char base_locale[ULOC_FULLNAME_CAPACITY];
uloc_toLanguageTag(
icu_base_locale, base_locale, ULOC_FULLNAME_CAPACITY, FALSE, &error);
if (U_FAILURE(error)) {
return isolate->Throw(*factory->illegal_argument_string());
}
Handle<JSObject> result = factory->NewJSObject(isolate->object_function());
Handle<String> value = factory->NewStringFromAsciiChecked(base_max_locale);
JSObject::AddProperty(result, maximized, value, NONE);
value = factory->NewStringFromAsciiChecked(base_locale);
JSObject::AddProperty(result, base, value, NONE);
output->set(i, *result);
}
Handle<JSArray> result = factory->NewJSArrayWithElements(output);
result->set_length(Smi::FromInt(length));
return *result;
}
RUNTIME_FUNCTION(Runtime_IsInitializedIntlObject) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, input, 0);
if (!input->IsJSObject()) return isolate->heap()->false_value();
Handle<JSObject> obj = Handle<JSObject>::cast(input);
Handle<String> marker = isolate->factory()->intl_initialized_marker_string();
Handle<Object> tag(obj->GetHiddenProperty(marker), isolate);
return isolate->heap()->ToBoolean(!tag->IsTheHole());
}
RUNTIME_FUNCTION(Runtime_IsInitializedIntlObjectOfType) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, input, 0);
CONVERT_ARG_HANDLE_CHECKED(String, expected_type, 1);
if (!input->IsJSObject()) return isolate->heap()->false_value();
Handle<JSObject> obj = Handle<JSObject>::cast(input);
Handle<String> marker = isolate->factory()->intl_initialized_marker_string();
Handle<Object> tag(obj->GetHiddenProperty(marker), isolate);
return isolate->heap()->ToBoolean(
tag->IsString() && String::cast(*tag)->Equals(*expected_type));
}
RUNTIME_FUNCTION(Runtime_MarkAsInitializedIntlObjectOfType) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSObject, input, 0);
CONVERT_ARG_HANDLE_CHECKED(String, type, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, impl, 2);
Handle<String> marker = isolate->factory()->intl_initialized_marker_string();
JSObject::SetHiddenProperty(input, marker, type);
marker = isolate->factory()->intl_impl_object_string();
JSObject::SetHiddenProperty(input, marker, impl);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetImplFromInitializedIntlObject) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, input, 0);
if (!input->IsJSObject()) {
Vector< Handle<Object> > arguments = HandleVector(&input, 1);
THROW_NEW_ERROR_RETURN_FAILURE(isolate,
NewTypeError("not_intl_object", arguments));
}
Handle<JSObject> obj = Handle<JSObject>::cast(input);
Handle<String> marker = isolate->factory()->intl_impl_object_string();
Handle<Object> impl(obj->GetHiddenProperty(marker), isolate);
if (impl->IsTheHole()) {
Vector< Handle<Object> > arguments = HandleVector(&obj, 1);
THROW_NEW_ERROR_RETURN_FAILURE(isolate,
NewTypeError("not_intl_object", arguments));
}
return *impl;
}
RUNTIME_FUNCTION(Runtime_CreateDateTimeFormat) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, locale, 0);
CONVERT_ARG_HANDLE_CHECKED(JSObject, options, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, resolved, 2);
Handle<ObjectTemplateInfo> date_format_template =
I18N::GetTemplate(isolate);
// Create an empty object wrapper.
Handle<JSObject> local_object;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, local_object,
Execution::InstantiateObject(date_format_template));
// Set date time formatter as internal field of the resulting JS object.
icu::SimpleDateFormat* date_format = DateFormat::InitializeDateTimeFormat(
isolate, locale, options, resolved);
if (!date_format) return isolate->ThrowIllegalOperation();
local_object->SetInternalField(0, reinterpret_cast<Smi*>(date_format));
Factory* factory = isolate->factory();
Handle<String> key = factory->NewStringFromStaticChars("dateFormat");
Handle<String> value = factory->NewStringFromStaticChars("valid");
JSObject::AddProperty(local_object, key, value, NONE);
// Make object handle weak so we can delete the data format once GC kicks in.
Handle<Object> wrapper = isolate->global_handles()->Create(*local_object);
GlobalHandles::MakeWeak(wrapper.location(),
reinterpret_cast<void*>(wrapper.location()),
DateFormat::DeleteDateFormat);
return *local_object;
}
RUNTIME_FUNCTION(Runtime_InternalDateFormat) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, date_format_holder, 0);
CONVERT_ARG_HANDLE_CHECKED(JSDate, date, 1);
Handle<Object> value;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, value, Execution::ToNumber(isolate, date));
icu::SimpleDateFormat* date_format =
DateFormat::UnpackDateFormat(isolate, date_format_holder);
if (!date_format) return isolate->ThrowIllegalOperation();
icu::UnicodeString result;
date_format->format(value->Number(), result);
Handle<String> result_str;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result_str,
isolate->factory()->NewStringFromTwoByte(
Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(result.getBuffer()),
result.length())));
return *result_str;
}
RUNTIME_FUNCTION(Runtime_InternalDateParse) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, date_format_holder, 0);
CONVERT_ARG_HANDLE_CHECKED(String, date_string, 1);
v8::String::Utf8Value utf8_date(v8::Utils::ToLocal(date_string));
icu::UnicodeString u_date(icu::UnicodeString::fromUTF8(*utf8_date));
icu::SimpleDateFormat* date_format =
DateFormat::UnpackDateFormat(isolate, date_format_holder);
if (!date_format) return isolate->ThrowIllegalOperation();
UErrorCode status = U_ZERO_ERROR;
UDate date = date_format->parse(u_date, status);
if (U_FAILURE(status)) return isolate->heap()->undefined_value();
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result,
Execution::NewDate(isolate, static_cast<double>(date)));
DCHECK(result->IsJSDate());
return *result;
}
RUNTIME_FUNCTION(Runtime_CreateNumberFormat) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, locale, 0);
CONVERT_ARG_HANDLE_CHECKED(JSObject, options, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, resolved, 2);
Handle<ObjectTemplateInfo> number_format_template =
I18N::GetTemplate(isolate);
// Create an empty object wrapper.
Handle<JSObject> local_object;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, local_object,
Execution::InstantiateObject(number_format_template));
// Set number formatter as internal field of the resulting JS object.
icu::DecimalFormat* number_format = NumberFormat::InitializeNumberFormat(
isolate, locale, options, resolved);
if (!number_format) return isolate->ThrowIllegalOperation();
local_object->SetInternalField(0, reinterpret_cast<Smi*>(number_format));
Factory* factory = isolate->factory();
Handle<String> key = factory->NewStringFromStaticChars("numberFormat");
Handle<String> value = factory->NewStringFromStaticChars("valid");
JSObject::AddProperty(local_object, key, value, NONE);
Handle<Object> wrapper = isolate->global_handles()->Create(*local_object);
GlobalHandles::MakeWeak(wrapper.location(),
reinterpret_cast<void*>(wrapper.location()),
NumberFormat::DeleteNumberFormat);
return *local_object;
}
RUNTIME_FUNCTION(Runtime_InternalNumberFormat) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, number_format_holder, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, number, 1);
Handle<Object> value;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, value, Execution::ToNumber(isolate, number));
icu::DecimalFormat* number_format =
NumberFormat::UnpackNumberFormat(isolate, number_format_holder);
if (!number_format) return isolate->ThrowIllegalOperation();
icu::UnicodeString result;
number_format->format(value->Number(), result);
Handle<String> result_str;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result_str,
isolate->factory()->NewStringFromTwoByte(
Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(result.getBuffer()),
result.length())));
return *result_str;
}
RUNTIME_FUNCTION(Runtime_InternalNumberParse) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, number_format_holder, 0);
CONVERT_ARG_HANDLE_CHECKED(String, number_string, 1);
v8::String::Utf8Value utf8_number(v8::Utils::ToLocal(number_string));
icu::UnicodeString u_number(icu::UnicodeString::fromUTF8(*utf8_number));
icu::DecimalFormat* number_format =
NumberFormat::UnpackNumberFormat(isolate, number_format_holder);
if (!number_format) return isolate->ThrowIllegalOperation();
UErrorCode status = U_ZERO_ERROR;
icu::Formattable result;
// ICU 4.6 doesn't support parseCurrency call. We need to wait for ICU49
// to be part of Chrome.
// TODO(cira): Include currency parsing code using parseCurrency call.
// We need to check if the formatter parses all currencies or only the
// one it was constructed with (it will impact the API - how to return ISO
// code and the value).
number_format->parse(u_number, result, status);
if (U_FAILURE(status)) return isolate->heap()->undefined_value();
switch (result.getType()) {
case icu::Formattable::kDouble:
return *isolate->factory()->NewNumber(result.getDouble());
case icu::Formattable::kLong:
return *isolate->factory()->NewNumberFromInt(result.getLong());
case icu::Formattable::kInt64:
return *isolate->factory()->NewNumber(
static_cast<double>(result.getInt64()));
default:
return isolate->heap()->undefined_value();
}
}
RUNTIME_FUNCTION(Runtime_CreateCollator) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, locale, 0);
CONVERT_ARG_HANDLE_CHECKED(JSObject, options, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, resolved, 2);
Handle<ObjectTemplateInfo> collator_template = I18N::GetTemplate(isolate);
// Create an empty object wrapper.
Handle<JSObject> local_object;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, local_object, Execution::InstantiateObject(collator_template));
// Set collator as internal field of the resulting JS object.
icu::Collator* collator = Collator::InitializeCollator(
isolate, locale, options, resolved);
if (!collator) return isolate->ThrowIllegalOperation();
local_object->SetInternalField(0, reinterpret_cast<Smi*>(collator));
Factory* factory = isolate->factory();
Handle<String> key = factory->NewStringFromStaticChars("collator");
Handle<String> value = factory->NewStringFromStaticChars("valid");
JSObject::AddProperty(local_object, key, value, NONE);
Handle<Object> wrapper = isolate->global_handles()->Create(*local_object);
GlobalHandles::MakeWeak(wrapper.location(),
reinterpret_cast<void*>(wrapper.location()),
Collator::DeleteCollator);
return *local_object;
}
RUNTIME_FUNCTION(Runtime_InternalCompare) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSObject, collator_holder, 0);
CONVERT_ARG_HANDLE_CHECKED(String, string1, 1);
CONVERT_ARG_HANDLE_CHECKED(String, string2, 2);
icu::Collator* collator = Collator::UnpackCollator(isolate, collator_holder);
if (!collator) return isolate->ThrowIllegalOperation();
v8::String::Value string_value1(v8::Utils::ToLocal(string1));
v8::String::Value string_value2(v8::Utils::ToLocal(string2));
const UChar* u_string1 = reinterpret_cast<const UChar*>(*string_value1);
const UChar* u_string2 = reinterpret_cast<const UChar*>(*string_value2);
UErrorCode status = U_ZERO_ERROR;
UCollationResult result = collator->compare(u_string1,
string_value1.length(),
u_string2,
string_value2.length(),
status);
if (U_FAILURE(status)) return isolate->ThrowIllegalOperation();
return *isolate->factory()->NewNumberFromInt(result);
}
RUNTIME_FUNCTION(Runtime_StringNormalize) {
HandleScope scope(isolate);
static const UNormalizationMode normalizationForms[] =
{ UNORM_NFC, UNORM_NFD, UNORM_NFKC, UNORM_NFKD };
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(String, stringValue, 0);
CONVERT_NUMBER_CHECKED(int, form_id, Int32, args[1]);
RUNTIME_ASSERT(form_id >= 0 &&
static_cast<size_t>(form_id) < arraysize(normalizationForms));
v8::String::Value string_value(v8::Utils::ToLocal(stringValue));
const UChar* u_value = reinterpret_cast<const UChar*>(*string_value);
// TODO(mnita): check Normalizer2 (not available in ICU 46)
UErrorCode status = U_ZERO_ERROR;
icu::UnicodeString result;
icu::Normalizer::normalize(u_value, normalizationForms[form_id], 0,
result, status);
if (U_FAILURE(status)) {
return isolate->heap()->undefined_value();
}
Handle<String> result_str;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, result_str,
isolate->factory()->NewStringFromTwoByte(
Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(result.getBuffer()),
result.length())));
return *result_str;
}
RUNTIME_FUNCTION(Runtime_CreateBreakIterator) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(String, locale, 0);
CONVERT_ARG_HANDLE_CHECKED(JSObject, options, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, resolved, 2);
Handle<ObjectTemplateInfo> break_iterator_template =
I18N::GetTemplate2(isolate);
// Create an empty object wrapper.
Handle<JSObject> local_object;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, local_object,
Execution::InstantiateObject(break_iterator_template));
// Set break iterator as internal field of the resulting JS object.
icu::BreakIterator* break_iterator = BreakIterator::InitializeBreakIterator(
isolate, locale, options, resolved);
if (!break_iterator) return isolate->ThrowIllegalOperation();
local_object->SetInternalField(0, reinterpret_cast<Smi*>(break_iterator));
// Make sure that the pointer to adopted text is NULL.
local_object->SetInternalField(1, reinterpret_cast<Smi*>(NULL));
Factory* factory = isolate->factory();
Handle<String> key = factory->NewStringFromStaticChars("breakIterator");
Handle<String> value = factory->NewStringFromStaticChars("valid");
JSObject::AddProperty(local_object, key, value, NONE);
// Make object handle weak so we can delete the break iterator once GC kicks
// in.
Handle<Object> wrapper = isolate->global_handles()->Create(*local_object);
GlobalHandles::MakeWeak(wrapper.location(),
reinterpret_cast<void*>(wrapper.location()),
BreakIterator::DeleteBreakIterator);
return *local_object;
}
RUNTIME_FUNCTION(Runtime_BreakIteratorAdoptText) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, break_iterator_holder, 0);
CONVERT_ARG_HANDLE_CHECKED(String, text, 1);
icu::BreakIterator* break_iterator =
BreakIterator::UnpackBreakIterator(isolate, break_iterator_holder);
if (!break_iterator) return isolate->ThrowIllegalOperation();
icu::UnicodeString* u_text = reinterpret_cast<icu::UnicodeString*>(
break_iterator_holder->GetInternalField(1));
delete u_text;
v8::String::Value text_value(v8::Utils::ToLocal(text));
u_text = new icu::UnicodeString(
reinterpret_cast<const UChar*>(*text_value), text_value.length());
break_iterator_holder->SetInternalField(1, reinterpret_cast<Smi*>(u_text));
break_iterator->setText(*u_text);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_BreakIteratorFirst) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, break_iterator_holder, 0);
icu::BreakIterator* break_iterator =
BreakIterator::UnpackBreakIterator(isolate, break_iterator_holder);
if (!break_iterator) return isolate->ThrowIllegalOperation();
return *isolate->factory()->NewNumberFromInt(break_iterator->first());
}
RUNTIME_FUNCTION(Runtime_BreakIteratorNext) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, break_iterator_holder, 0);
icu::BreakIterator* break_iterator =
BreakIterator::UnpackBreakIterator(isolate, break_iterator_holder);
if (!break_iterator) return isolate->ThrowIllegalOperation();
return *isolate->factory()->NewNumberFromInt(break_iterator->next());
}
RUNTIME_FUNCTION(Runtime_BreakIteratorCurrent) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, break_iterator_holder, 0);
icu::BreakIterator* break_iterator =
BreakIterator::UnpackBreakIterator(isolate, break_iterator_holder);
if (!break_iterator) return isolate->ThrowIllegalOperation();
return *isolate->factory()->NewNumberFromInt(break_iterator->current());
}
RUNTIME_FUNCTION(Runtime_BreakIteratorBreakType) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, break_iterator_holder, 0);
icu::BreakIterator* break_iterator =
BreakIterator::UnpackBreakIterator(isolate, break_iterator_holder);
if (!break_iterator) return isolate->ThrowIllegalOperation();
// TODO(cira): Remove cast once ICU fixes base BreakIterator class.
icu::RuleBasedBreakIterator* rule_based_iterator =
static_cast<icu::RuleBasedBreakIterator*>(break_iterator);
int32_t status = rule_based_iterator->getRuleStatus();
// Keep return values in sync with JavaScript BreakType enum.
if (status >= UBRK_WORD_NONE && status < UBRK_WORD_NONE_LIMIT) {
return *isolate->factory()->NewStringFromStaticChars("none");
} else if (status >= UBRK_WORD_NUMBER && status < UBRK_WORD_NUMBER_LIMIT) {
return *isolate->factory()->number_string();
} else if (status >= UBRK_WORD_LETTER && status < UBRK_WORD_LETTER_LIMIT) {
return *isolate->factory()->NewStringFromStaticChars("letter");
} else if (status >= UBRK_WORD_KANA && status < UBRK_WORD_KANA_LIMIT) {
return *isolate->factory()->NewStringFromStaticChars("kana");
} else if (status >= UBRK_WORD_IDEO && status < UBRK_WORD_IDEO_LIMIT) {
return *isolate->factory()->NewStringFromStaticChars("ideo");
} else {
return *isolate->factory()->NewStringFromStaticChars("unknown");
}
}
#endif // V8_I18N_SUPPORT
// Finds the script object from the script data. NOTE: This operation uses
// heap traversal to find the function generated for the source position
// for the requested break point. For lazily compiled functions several heap
// traversals might be required rendering this operation as a rather slow
// operation. However for setting break points which is normally done through
// some kind of user interaction the performance is not crucial.
static Handle<Object> Runtime_GetScriptFromScriptName(
Handle<String> script_name) {
// Scan the heap for Script objects to find the script with the requested
// script data.
Handle<Script> script;
Factory* factory = script_name->GetIsolate()->factory();
Heap* heap = script_name->GetHeap();
HeapIterator iterator(heap);
HeapObject* obj = NULL;
while (script.is_null() && ((obj = iterator.next()) != NULL)) {
// If a script is found check if it has the script data requested.
if (obj->IsScript()) {
if (Script::cast(obj)->name()->IsString()) {
if (String::cast(Script::cast(obj)->name())->Equals(*script_name)) {
script = Handle<Script>(Script::cast(obj));
}
}
}
}
// If no script with the requested script data is found return undefined.
if (script.is_null()) return factory->undefined_value();
// Return the script found.
return Script::GetWrapper(script);
}
// Get the script object from script data. NOTE: Regarding performance
// see the NOTE for GetScriptFromScriptData.
// args[0]: script data for the script to find the source for
RUNTIME_FUNCTION(Runtime_GetScript) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(String, script_name, 0);
// Find the requested script.
Handle<Object> result =
Runtime_GetScriptFromScriptName(Handle<String>(script_name));
return *result;
}
// Collect the raw data for a stack trace. Returns an array of 4
// element segments each containing a receiver, function, code and
// native code offset.
RUNTIME_FUNCTION(Runtime_CollectStackTrace) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, error_object, 0);
CONVERT_ARG_HANDLE_CHECKED(Object, caller, 1);
if (!isolate->bootstrapper()->IsActive()) {
// Optionally capture a more detailed stack trace for the message.
isolate->CaptureAndSetDetailedStackTrace(error_object);
// Capture a simple stack trace for the stack property.
isolate->CaptureAndSetSimpleStackTrace(error_object, caller);
}
return isolate->heap()->undefined_value();
}
// Returns V8 version as a string.
RUNTIME_FUNCTION(Runtime_GetV8Version) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
const char* version_string = v8::V8::GetVersion();
return *isolate->factory()->NewStringFromAsciiChecked(version_string);
}
// Returns function of generator activation.
RUNTIME_FUNCTION(Runtime_GeneratorGetFunction) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
return generator->function();
}
// Returns context of generator activation.
RUNTIME_FUNCTION(Runtime_GeneratorGetContext) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
return generator->context();
}
// Returns receiver of generator activation.
RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
return generator->receiver();
}
// Returns generator continuation as a PC offset, or the magic -1 or 0 values.
RUNTIME_FUNCTION(Runtime_GeneratorGetContinuation) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
return Smi::FromInt(generator->continuation());
}
RUNTIME_FUNCTION(Runtime_GeneratorGetSourcePosition) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
if (generator->is_suspended()) {
Handle<Code> code(generator->function()->code(), isolate);
int offset = generator->continuation();
RUNTIME_ASSERT(0 <= offset && offset < code->Size());
Address pc = code->address() + offset;
return Smi::FromInt(code->SourcePosition(pc));
}
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_Abort) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_SMI_ARG_CHECKED(message_id, 0);
const char* message = GetBailoutReason(
static_cast<BailoutReason>(message_id));
base::OS::PrintError("abort: %s\n", message);
isolate->PrintStack(stderr);
base::OS::Abort();
UNREACHABLE();
return NULL;
}
RUNTIME_FUNCTION(Runtime_AbortJS) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, message, 0);
base::OS::PrintError("abort: %s\n", message->ToCString().get());
isolate->PrintStack(stderr);
base::OS::Abort();
UNREACHABLE();
return NULL;
}
RUNTIME_FUNCTION(Runtime_FlattenString) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(String, str, 0);
return *String::Flatten(str);
}
RUNTIME_FUNCTION(Runtime_NotifyContextDisposed) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
isolate->heap()->NotifyContextDisposed();
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_LoadMutableDouble) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
CONVERT_ARG_HANDLE_CHECKED(Smi, index, 1);
RUNTIME_ASSERT((index->value() & 1) == 1);
FieldIndex field_index =
FieldIndex::ForLoadByFieldIndex(object->map(), index->value());
if (field_index.is_inobject()) {
RUNTIME_ASSERT(field_index.property_index() <
object->map()->inobject_properties());
} else {
RUNTIME_ASSERT(field_index.outobject_array_index() <
object->properties()->length());
}
Handle<Object> raw_value(object->RawFastPropertyAt(field_index), isolate);
RUNTIME_ASSERT(raw_value->IsMutableHeapNumber());
return *Object::WrapForRead(isolate, raw_value, Representation::Double());
}
RUNTIME_FUNCTION(Runtime_TryMigrateInstance) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
if (!object->IsJSObject()) return Smi::FromInt(0);
Handle<JSObject> js_object = Handle<JSObject>::cast(object);
if (!js_object->map()->is_deprecated()) return Smi::FromInt(0);
// This call must not cause lazy deopts, because it's called from deferred
// code where we can't handle lazy deopts for lack of a suitable bailout
// ID. So we just try migration and signal failure if necessary,
// which will also trigger a deopt.
if (!JSObject::TryMigrateInstance(js_object)) return Smi::FromInt(0);
return *object;
}
RUNTIME_FUNCTION(Runtime_GetFromCache) {
SealHandleScope shs(isolate);
// This is only called from codegen, so checks might be more lax.
CONVERT_ARG_CHECKED(JSFunctionResultCache, cache, 0);
CONVERT_ARG_CHECKED(Object, key, 1);
{
DisallowHeapAllocation no_alloc;
int finger_index = cache->finger_index();
Object* o = cache->get(finger_index);
if (o == key) {
// The fastest case: hit the same place again.
return cache->get(finger_index + 1);
}
for (int i = finger_index - 2;
i >= JSFunctionResultCache::kEntriesIndex;
i -= 2) {
o = cache->get(i);
if (o == key) {
cache->set_finger_index(i);
return cache->get(i + 1);
}
}
int size = cache->size();
DCHECK(size <= cache->length());
for (int i = size - 2; i > finger_index; i -= 2) {
o = cache->get(i);
if (o == key) {
cache->set_finger_index(i);
return cache->get(i + 1);
}
}
}
// There is no value in the cache. Invoke the function and cache result.
HandleScope scope(isolate);
Handle<JSFunctionResultCache> cache_handle(cache);
Handle<Object> key_handle(key, isolate);
Handle<Object> value;
{
Handle<JSFunction> factory(JSFunction::cast(
cache_handle->get(JSFunctionResultCache::kFactoryIndex)));
// TODO(antonm): consider passing a receiver when constructing a cache.
Handle<JSObject> receiver(isolate->global_proxy());
// This handle is nor shared, nor used later, so it's safe.
Handle<Object> argv[] = { key_handle };
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, value,
Execution::Call(isolate, factory, receiver, arraysize(argv), argv));
}
#ifdef VERIFY_HEAP
if (FLAG_verify_heap) {
cache_handle->JSFunctionResultCacheVerify();
}
#endif
// Function invocation may have cleared the cache. Reread all the data.
int finger_index = cache_handle->finger_index();
int size = cache_handle->size();
// If we have spare room, put new data into it, otherwise evict post finger
// entry which is likely to be the least recently used.
int index = -1;
if (size < cache_handle->length()) {
cache_handle->set_size(size + JSFunctionResultCache::kEntrySize);
index = size;
} else {
index = finger_index + JSFunctionResultCache::kEntrySize;
if (index == cache_handle->length()) {
index = JSFunctionResultCache::kEntriesIndex;
}
}
DCHECK(index % 2 == 0);
DCHECK(index >= JSFunctionResultCache::kEntriesIndex);
DCHECK(index < cache_handle->length());
cache_handle->set(index, *key_handle);
cache_handle->set(index + 1, *value);
cache_handle->set_finger_index(index);
#ifdef VERIFY_HEAP
if (FLAG_verify_heap) {
cache_handle->JSFunctionResultCacheVerify();
}
#endif
return *value;
}
RUNTIME_FUNCTION(Runtime_MessageGetStartPosition) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
return Smi::FromInt(message->start_position());
}
RUNTIME_FUNCTION(Runtime_MessageGetScript) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
return message->script();
}
#ifdef DEBUG
// ListNatives is ONLY used by the fuzz-natives.js in debug mode
// Exclude the code in release mode.
RUNTIME_FUNCTION(Runtime_ListNatives) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
#define COUNT_ENTRY(Name, argc, ressize) + 1
int entry_count = 0
RUNTIME_FUNCTION_LIST(COUNT_ENTRY)
INLINE_FUNCTION_LIST(COUNT_ENTRY)
INLINE_OPTIMIZED_FUNCTION_LIST(COUNT_ENTRY);
#undef COUNT_ENTRY
Factory* factory = isolate->factory();
Handle<FixedArray> elements = factory->NewFixedArray(entry_count);
int index = 0;
bool inline_runtime_functions = false;
#define ADD_ENTRY(Name, argc, ressize) \
{ \
HandleScope inner(isolate); \
Handle<String> name; \
/* Inline runtime functions have an underscore in front of the name. */ \
if (inline_runtime_functions) { \
name = factory->NewStringFromStaticChars("_" #Name); \
} else { \
name = factory->NewStringFromStaticChars(#Name); \
} \
Handle<FixedArray> pair_elements = factory->NewFixedArray(2); \
pair_elements->set(0, *name); \
pair_elements->set(1, Smi::FromInt(argc)); \
Handle<JSArray> pair = factory->NewJSArrayWithElements(pair_elements); \
elements->set(index++, *pair); \
}
inline_runtime_functions = false;
RUNTIME_FUNCTION_LIST(ADD_ENTRY)
INLINE_OPTIMIZED_FUNCTION_LIST(ADD_ENTRY)
inline_runtime_functions = true;
INLINE_FUNCTION_LIST(ADD_ENTRY)
#undef ADD_ENTRY
DCHECK_EQ(index, entry_count);
Handle<JSArray> result = factory->NewJSArrayWithElements(elements);
return *result;
}
#endif
RUNTIME_FUNCTION(Runtime_IS_VAR) {
UNREACHABLE(); // implemented as macro in the parser
return NULL;
}
#define ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(Name) \
RUNTIME_FUNCTION(Runtime_Has##Name) { \
CONVERT_ARG_CHECKED(JSObject, obj, 0); \
return isolate->heap()->ToBoolean(obj->Has##Name()); \
}
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastSmiElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastObjectElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastSmiOrObjectElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastDoubleElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastHoleyElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(DictionaryElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(SloppyArgumentsElements)
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalArrayElements)
// Properties test sitting with elements tests - not fooling anyone.
ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastProperties)
#undef ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION
#define TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION(Type, type, TYPE, ctype, size) \
RUNTIME_FUNCTION(Runtime_HasExternal##Type##Elements) { \
CONVERT_ARG_CHECKED(JSObject, obj, 0); \
return isolate->heap()->ToBoolean(obj->HasExternal##Type##Elements()); \
}
TYPED_ARRAYS(TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION)
#undef TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
#define FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION(Type, type, TYPE, ctype, s) \
RUNTIME_FUNCTION(Runtime_HasFixed##Type##Elements) { \
CONVERT_ARG_CHECKED(JSObject, obj, 0); \
return isolate->heap()->ToBoolean(obj->HasFixed##Type##Elements()); \
}
TYPED_ARRAYS(FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION)
#undef FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
RUNTIME_FUNCTION(Runtime_HaveSameMap) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(JSObject, obj1, 0);
CONVERT_ARG_CHECKED(JSObject, obj2, 1);
return isolate->heap()->ToBoolean(obj1->map() == obj2->map());
}
RUNTIME_FUNCTION(Runtime_IsJSGlobalProxy) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSGlobalProxy());
}
RUNTIME_FUNCTION(Runtime_IsObserved) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
if (!args[0]->IsJSReceiver()) return isolate->heap()->false_value();
CONVERT_ARG_CHECKED(JSReceiver, obj, 0);
DCHECK(!obj->IsJSGlobalProxy() || !obj->map()->is_observed());
return isolate->heap()->ToBoolean(obj->map()->is_observed());
}
RUNTIME_FUNCTION(Runtime_SetIsObserved) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0);
RUNTIME_ASSERT(!obj->IsJSGlobalProxy());
if (obj->IsJSProxy()) return isolate->heap()->undefined_value();
RUNTIME_ASSERT(!obj->map()->is_observed());
DCHECK(obj->IsJSObject());
JSObject::SetObserved(Handle<JSObject>::cast(obj));
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_EnqueueMicrotask) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, microtask, 0);
isolate->EnqueueMicrotask(microtask);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_RunMicrotasks) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
isolate->RunMicrotasks();
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(Runtime_GetObservationState) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
return isolate->heap()->observation_state();
}
RUNTIME_FUNCTION(Runtime_ObservationWeakMapCreate) {
HandleScope scope(isolate);
DCHECK(args.length() == 0);
// TODO(adamk): Currently this runtime function is only called three times per
// isolate. If it's called more often, the map should be moved into the
// strong root list.
Handle<Map> map =
isolate->factory()->NewMap(JS_WEAK_MAP_TYPE, JSWeakMap::kSize);
Handle<JSWeakMap> weakmap =
Handle<JSWeakMap>::cast(isolate->factory()->NewJSObjectFromMap(map));
return *WeakCollectionInitialize(isolate, weakmap);
}
static bool ContextsHaveSameOrigin(Handle<Context> context1,
Handle<Context> context2) {
return context1->security_token() == context2->security_token();
}
RUNTIME_FUNCTION(Runtime_ObserverObjectAndRecordHaveSameOrigin) {
HandleScope scope(isolate);
DCHECK(args.length() == 3);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, observer, 0);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, record, 2);
Handle<Context> observer_context(observer->context()->native_context());
Handle<Context> object_context(object->GetCreationContext());
Handle<Context> record_context(record->GetCreationContext());
return isolate->heap()->ToBoolean(
ContextsHaveSameOrigin(object_context, observer_context) &&
ContextsHaveSameOrigin(object_context, record_context));
}
RUNTIME_FUNCTION(Runtime_ObjectWasCreatedInCurrentOrigin) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
Handle<Context> creation_context(object->GetCreationContext(), isolate);
return isolate->heap()->ToBoolean(
ContextsHaveSameOrigin(creation_context, isolate->native_context()));
}
RUNTIME_FUNCTION(Runtime_GetObjectContextObjectObserve) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
Handle<Context> context(object->GetCreationContext(), isolate);
return context->native_object_observe();
}
RUNTIME_FUNCTION(Runtime_GetObjectContextObjectGetNotifier) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
Handle<Context> context(object->GetCreationContext(), isolate);
return context->native_object_get_notifier();
}
RUNTIME_FUNCTION(Runtime_GetObjectContextNotifierPerformChange) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, object_info, 0);
Handle<Context> context(object_info->GetCreationContext(), isolate);
return context->native_object_notifier_perform_change();
}
static Object* ArrayConstructorCommon(Isolate* isolate,
Handle<JSFunction> constructor,
Handle<AllocationSite> site,
Arguments* caller_args) {
Factory* factory = isolate->factory();
bool holey = false;
bool can_use_type_feedback = true;
if (caller_args->length() == 1) {
Handle<Object> argument_one = caller_args->at<Object>(0);
if (argument_one->IsSmi()) {
int value = Handle<Smi>::cast(argument_one)->value();
if (value < 0 || value >= JSObject::kInitialMaxFastElementArray) {
// the array is a dictionary in this case.
can_use_type_feedback = false;
} else if (value != 0) {
holey = true;
}
} else {
// Non-smi length argument produces a dictionary
can_use_type_feedback = false;
}
}
Handle<JSArray> array;
if (!site.is_null() && can_use_type_feedback) {
ElementsKind to_kind = site->GetElementsKind();
if (holey && !IsFastHoleyElementsKind(to_kind)) {
to_kind = GetHoleyElementsKind(to_kind);
// Update the allocation site info to reflect the advice alteration.
site->SetElementsKind(to_kind);
}
// We should allocate with an initial map that reflects the allocation site
// advice. Therefore we use AllocateJSObjectFromMap instead of passing
// the constructor.
Handle<Map> initial_map(constructor->initial_map(), isolate);
if (to_kind != initial_map->elements_kind()) {
initial_map = Map::AsElementsKind(initial_map, to_kind);
}
// If we don't care to track arrays of to_kind ElementsKind, then
// don't emit a memento for them.
Handle<AllocationSite> allocation_site;
if (AllocationSite::GetMode(to_kind) == TRACK_ALLOCATION_SITE) {
allocation_site = site;
}
array = Handle<JSArray>::cast(factory->NewJSObjectFromMap(
initial_map, NOT_TENURED, true, allocation_site));
} else {
array = Handle<JSArray>::cast(factory->NewJSObject(constructor));
// We might need to transition to holey
ElementsKind kind = constructor->initial_map()->elements_kind();
if (holey && !IsFastHoleyElementsKind(kind)) {
kind = GetHoleyElementsKind(kind);
JSObject::TransitionElementsKind(array, kind);
}
}
factory->NewJSArrayStorage(array, 0, 0, DONT_INITIALIZE_ARRAY_ELEMENTS);
ElementsKind old_kind = array->GetElementsKind();
RETURN_FAILURE_ON_EXCEPTION(
isolate, ArrayConstructInitializeElements(array, caller_args));
if (!site.is_null() &&
(old_kind != array->GetElementsKind() ||
!can_use_type_feedback)) {
// The arguments passed in caused a transition. This kind of complexity
// can't be dealt with in the inlined hydrogen array constructor case.
// We must mark the allocationsite as un-inlinable.
site->SetDoNotInlineCall();
}
return *array;
}
RUNTIME_FUNCTION(Runtime_ArrayConstructor) {
HandleScope scope(isolate);
// If we get 2 arguments then they are the stub parameters (constructor, type
// info). If we get 4, then the first one is a pointer to the arguments
// passed by the caller, and the last one is the length of the arguments
// passed to the caller (redundant, but useful to check on the deoptimizer
// with an assert).
Arguments empty_args(0, NULL);
bool no_caller_args = args.length() == 2;
DCHECK(no_caller_args || args.length() == 4);
int parameters_start = no_caller_args ? 0 : 1;
Arguments* caller_args = no_caller_args
? &empty_args
: reinterpret_cast<Arguments*>(args[0]);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, parameters_start);
CONVERT_ARG_HANDLE_CHECKED(Object, type_info, parameters_start + 1);
#ifdef DEBUG
if (!no_caller_args) {
CONVERT_SMI_ARG_CHECKED(arg_count, parameters_start + 2);
DCHECK(arg_count == caller_args->length());
}
#endif
Handle<AllocationSite> site;
if (!type_info.is_null() &&
*type_info != isolate->heap()->undefined_value()) {
site = Handle<AllocationSite>::cast(type_info);
DCHECK(!site->SitePointsToLiteral());
}
return ArrayConstructorCommon(isolate,
constructor,
site,
caller_args);
}
RUNTIME_FUNCTION(Runtime_InternalArrayConstructor) {
HandleScope scope(isolate);
Arguments empty_args(0, NULL);
bool no_caller_args = args.length() == 1;
DCHECK(no_caller_args || args.length() == 3);
int parameters_start = no_caller_args ? 0 : 1;
Arguments* caller_args = no_caller_args
? &empty_args
: reinterpret_cast<Arguments*>(args[0]);
CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, parameters_start);
#ifdef DEBUG
if (!no_caller_args) {
CONVERT_SMI_ARG_CHECKED(arg_count, parameters_start + 1);
DCHECK(arg_count == caller_args->length());
}
#endif
return ArrayConstructorCommon(isolate,
constructor,
Handle<AllocationSite>::null(),
caller_args);
}
RUNTIME_FUNCTION(Runtime_NormalizeElements) {
HandleScope scope(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
RUNTIME_ASSERT(!array->HasExternalArrayElements() &&
!array->HasFixedTypedArrayElements());
JSObject::NormalizeElements(array);
return *array;
}
RUNTIME_FUNCTION(Runtime_MaxSmi) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
return Smi::FromInt(Smi::kMaxValue);
}
// TODO(dcarney): remove this function when TurboFan supports it.
// Takes the object to be iterated over and the result of GetPropertyNamesFast
// Returns pair (cache_array, cache_type).
RUNTIME_FUNCTION_RETURN_PAIR(Runtime_ForInInit) {
SealHandleScope scope(isolate);
DCHECK(args.length() == 2);
// This simulates CONVERT_ARG_HANDLE_CHECKED for calls returning pairs.
// Not worth creating a macro atm as this function should be removed.
if (!args[0]->IsJSReceiver() || !args[1]->IsObject()) {
Object* error = isolate->ThrowIllegalOperation();
return MakePair(error, isolate->heap()->undefined_value());
}
Handle<JSReceiver> object = args.at<JSReceiver>(0);
Handle<Object> cache_type = args.at<Object>(1);
if (cache_type->IsMap()) {
// Enum cache case.
if (Map::EnumLengthBits::decode(Map::cast(*cache_type)->bit_field3()) ==
0) {
// 0 length enum.
// Can't handle this case in the graph builder,
// so transform it into the empty fixed array case.
return MakePair(isolate->heap()->empty_fixed_array(), Smi::FromInt(1));
}
return MakePair(object->map()->instance_descriptors()->GetEnumCache(),
*cache_type);
} else {
// FixedArray case.
Smi* new_cache_type = Smi::FromInt(object->IsJSProxy() ? 0 : 1);
return MakePair(*Handle<FixedArray>::cast(cache_type), new_cache_type);
}
}
// TODO(dcarney): remove this function when TurboFan supports it.
RUNTIME_FUNCTION(Runtime_ForInCacheArrayLength) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_HANDLE_CHECKED(Object, cache_type, 0);
CONVERT_ARG_HANDLE_CHECKED(FixedArray, array, 1);
int length = 0;
if (cache_type->IsMap()) {
length = Map::cast(*cache_type)->EnumLength();
} else {
DCHECK(cache_type->IsSmi());
length = array->length();
}
return Smi::FromInt(length);
}
// TODO(dcarney): remove this function when TurboFan supports it.
// Takes (the object to be iterated over,
// cache_array from ForInInit,
// cache_type from ForInInit,
// the current index)
// Returns pair (array[index], needs_filtering).
RUNTIME_FUNCTION_RETURN_PAIR(Runtime_ForInNext) {
SealHandleScope scope(isolate);
DCHECK(args.length() == 4);
int32_t index;
// This simulates CONVERT_ARG_HANDLE_CHECKED for calls returning pairs.
// Not worth creating a macro atm as this function should be removed.
if (!args[0]->IsJSReceiver() || !args[1]->IsFixedArray() ||
!args[2]->IsObject() || !args[3]->ToInt32(&index)) {
Object* error = isolate->ThrowIllegalOperation();
return MakePair(error, isolate->heap()->undefined_value());
}
Handle<JSReceiver> object = args.at<JSReceiver>(0);
Handle<FixedArray> array = args.at<FixedArray>(1);
Handle<Object> cache_type = args.at<Object>(2);
// Figure out first if a slow check is needed for this object.
bool slow_check_needed = false;
if (cache_type->IsMap()) {
if (object->map() != Map::cast(*cache_type)) {
// Object transitioned. Need slow check.
slow_check_needed = true;
}
} else {
// No slow check needed for proxies.
slow_check_needed = Smi::cast(*cache_type)->value() == 1;
}
return MakePair(array->get(index),
isolate->heap()->ToBoolean(slow_check_needed));
}
// ----------------------------------------------------------------------------
// Reference implementation for inlined runtime functions. Only used when the
// compiler does not support a certain intrinsic. Don't optimize these, but
// implement the intrinsic in the respective compiler instead.
// TODO(mstarzinger): These are place-holder stubs for TurboFan and will
// eventually all have a C++ implementation and this macro will be gone.
#define U(name) \
RUNTIME_FUNCTION(RuntimeReference_##name) { \
UNIMPLEMENTED(); \
return NULL; \
}
U(IsStringWrapperSafeForDefaultValueOf)
U(DebugBreakInOptimizedCode)
#undef U
RUNTIME_FUNCTION(RuntimeReference_IsSmi) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsSmi());
}
RUNTIME_FUNCTION(RuntimeReference_IsNonNegativeSmi) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsSmi() &&
Smi::cast(obj)->value() >= 0);
}
RUNTIME_FUNCTION(RuntimeReference_IsArray) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSArray());
}
RUNTIME_FUNCTION(RuntimeReference_IsRegExp) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSRegExp());
}
RUNTIME_FUNCTION(RuntimeReference_IsConstructCall) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
return isolate->heap()->ToBoolean(frame->IsConstructor());
}
RUNTIME_FUNCTION(RuntimeReference_CallFunction) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_Call(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_ArgumentsLength) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 0);
JavaScriptFrameIterator it(isolate);
JavaScriptFrame* frame = it.frame();
return Smi::FromInt(frame->GetArgumentsLength());
}
RUNTIME_FUNCTION(RuntimeReference_Arguments) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_GetArgumentsProperty(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_ValueOf) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
if (!obj->IsJSValue()) return obj;
return JSValue::cast(obj)->value();
}
RUNTIME_FUNCTION(RuntimeReference_SetValueOf) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(Object, obj, 0);
CONVERT_ARG_CHECKED(Object, value, 1);
if (!obj->IsJSValue()) return value;
JSValue::cast(obj)->set_value(value);
return value;
}
RUNTIME_FUNCTION(RuntimeReference_DateField) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(Object, obj, 0);
CONVERT_SMI_ARG_CHECKED(index, 1);
if (!obj->IsJSDate()) {
HandleScope scope(isolate);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewTypeError("not_date_object", HandleVector<Object>(NULL, 0)));
}
JSDate* date = JSDate::cast(obj);
if (index == 0) return date->value();
return JSDate::GetField(date, Smi::FromInt(index));
}
RUNTIME_FUNCTION(RuntimeReference_StringCharFromCode) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_CharFromCode(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_StringCharAt) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
if (!args[0]->IsString()) return Smi::FromInt(0);
if (!args[1]->IsNumber()) return Smi::FromInt(0);
if (std::isinf(args.number_at(1))) return isolate->heap()->empty_string();
Object* code = __RT_impl_Runtime_StringCharCodeAtRT(args, isolate);
if (code->IsNaN()) return isolate->heap()->empty_string();
return __RT_impl_Runtime_CharFromCode(Arguments(1, &code), isolate);
}
RUNTIME_FUNCTION(RuntimeReference_OneByteSeqStringSetChar) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 3);
CONVERT_INT32_ARG_CHECKED(index, 0);
CONVERT_INT32_ARG_CHECKED(value, 1);
CONVERT_ARG_CHECKED(SeqOneByteString, string, 2);
string->SeqOneByteStringSet(index, value);
return string;
}
RUNTIME_FUNCTION(RuntimeReference_TwoByteSeqStringSetChar) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 3);
CONVERT_INT32_ARG_CHECKED(index, 0);
CONVERT_INT32_ARG_CHECKED(value, 1);
CONVERT_ARG_CHECKED(SeqTwoByteString, string, 2);
string->SeqTwoByteStringSet(index, value);
return string;
}
RUNTIME_FUNCTION(RuntimeReference_ObjectEquals) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
CONVERT_ARG_CHECKED(Object, obj1, 0);
CONVERT_ARG_CHECKED(Object, obj2, 1);
return isolate->heap()->ToBoolean(obj1 == obj2);
}
RUNTIME_FUNCTION(RuntimeReference_IsObject) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
if (!obj->IsHeapObject()) return isolate->heap()->false_value();
if (obj->IsNull()) return isolate->heap()->true_value();
if (obj->IsUndetectableObject()) return isolate->heap()->false_value();
Map* map = HeapObject::cast(obj)->map();
bool is_non_callable_spec_object =
map->instance_type() >= FIRST_NONCALLABLE_SPEC_OBJECT_TYPE &&
map->instance_type() <= LAST_NONCALLABLE_SPEC_OBJECT_TYPE;
return isolate->heap()->ToBoolean(is_non_callable_spec_object);
}
RUNTIME_FUNCTION(RuntimeReference_IsFunction) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsJSFunction());
}
RUNTIME_FUNCTION(RuntimeReference_IsUndetectableObject) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsUndetectableObject());
}
RUNTIME_FUNCTION(RuntimeReference_IsSpecObject) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
return isolate->heap()->ToBoolean(obj->IsSpecObject());
}
RUNTIME_FUNCTION(RuntimeReference_MathPow) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_MathPowSlow(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_IsMinusZero) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
if (!obj->IsHeapNumber()) return isolate->heap()->false_value();
HeapNumber* number = HeapNumber::cast(obj);
return isolate->heap()->ToBoolean(IsMinusZero(number->value()));
}
RUNTIME_FUNCTION(RuntimeReference_HasCachedArrayIndex) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
return isolate->heap()->false_value();
}
RUNTIME_FUNCTION(RuntimeReference_GetCachedArrayIndex) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(RuntimeReference_FastOneByteArrayJoin) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
return isolate->heap()->undefined_value();
}
RUNTIME_FUNCTION(RuntimeReference_GeneratorNext) {
UNREACHABLE(); // Optimization disabled in SetUpGenerators().
return NULL;
}
RUNTIME_FUNCTION(RuntimeReference_GeneratorThrow) {
UNREACHABLE(); // Optimization disabled in SetUpGenerators().
return NULL;
}
RUNTIME_FUNCTION(RuntimeReference_ClassOf) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 1);
CONVERT_ARG_CHECKED(Object, obj, 0);
if (!obj->IsJSReceiver()) return isolate->heap()->null_value();
return JSReceiver::cast(obj)->class_name();
}
RUNTIME_FUNCTION(RuntimeReference_StringCharCodeAt) {
SealHandleScope shs(isolate);
DCHECK(args.length() == 2);
if (!args[0]->IsString()) return isolate->heap()->undefined_value();
if (!args[1]->IsNumber()) return isolate->heap()->undefined_value();
if (std::isinf(args.number_at(1))) return isolate->heap()->nan_value();
return __RT_impl_Runtime_StringCharCodeAtRT(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_StringAdd) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_StringAdd(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_SubString) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_SubString(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_StringCompare) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_StringCompare(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_RegExpExec) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_RegExpExecRT(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_RegExpConstructResult) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_RegExpConstructResult(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_GetFromCache) {
HandleScope scope(isolate);
DCHECK(args.length() == 2);
CONVERT_SMI_ARG_CHECKED(id, 0);
args[0] = isolate->native_context()->jsfunction_result_caches()->get(id);
return __RT_impl_Runtime_GetFromCache(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_NumberToString) {
SealHandleScope shs(isolate);
return __RT_impl_Runtime_NumberToStringRT(args, isolate);
}
RUNTIME_FUNCTION(RuntimeReference_DebugIsActive) {
SealHandleScope shs(isolate);
return Smi::FromInt(isolate->debug()->is_active());
}
// ----------------------------------------------------------------------------
// Implementation of Runtime
#define F(name, number_of_args, result_size) \
{ \
Runtime::k##name, Runtime::RUNTIME, #name, FUNCTION_ADDR(Runtime_##name), \
number_of_args, result_size \
} \
,
#define I(name, number_of_args, result_size) \
{ \
Runtime::kInline##name, Runtime::INLINE, "_" #name, \
FUNCTION_ADDR(RuntimeReference_##name), number_of_args, result_size \
} \
,
#define IO(name, number_of_args, result_size) \
{ \
Runtime::kInlineOptimized##name, Runtime::INLINE_OPTIMIZED, "_" #name, \
FUNCTION_ADDR(Runtime_##name), number_of_args, result_size \
} \
,
static const Runtime::Function kIntrinsicFunctions[] = {
RUNTIME_FUNCTION_LIST(F)
INLINE_OPTIMIZED_FUNCTION_LIST(F)
INLINE_FUNCTION_LIST(I)
INLINE_OPTIMIZED_FUNCTION_LIST(IO)
};
#undef IO
#undef I
#undef F
void Runtime::InitializeIntrinsicFunctionNames(Isolate* isolate,
Handle<NameDictionary> dict) {
DCHECK(dict->NumberOfElements() == 0);
HandleScope scope(isolate);
for (int i = 0; i < kNumFunctions; ++i) {
const char* name = kIntrinsicFunctions[i].name;
if (name == NULL) continue;
Handle<NameDictionary> new_dict = NameDictionary::Add(
dict,
isolate->factory()->InternalizeUtf8String(name),
Handle<Smi>(Smi::FromInt(i), isolate),
PropertyDetails(NONE, NORMAL, Representation::None()));
// The dictionary does not need to grow.
CHECK(new_dict.is_identical_to(dict));
}
}
const Runtime::Function* Runtime::FunctionForName(Handle<String> name) {
Heap* heap = name->GetHeap();
int entry = heap->intrinsic_function_names()->FindEntry(name);
if (entry != kNotFound) {
Object* smi_index = heap->intrinsic_function_names()->ValueAt(entry);
int function_index = Smi::cast(smi_index)->value();
return &(kIntrinsicFunctions[function_index]);
}
return NULL;
}
const Runtime::Function* Runtime::FunctionForEntry(Address entry) {
for (size_t i = 0; i < arraysize(kIntrinsicFunctions); ++i) {
if (entry == kIntrinsicFunctions[i].entry) {
return &(kIntrinsicFunctions[i]);
}
}
return NULL;
}
const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
return &(kIntrinsicFunctions[static_cast<int>(id)]);
}
} } // namespace v8::internal