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// stackwalker_address_list_unittest.cc: Unit tests for the
// StackwalkerAddressList class.
//
// Author: Chris Hamilton <chrisha@chromium.org>
#include <string>
#include <vector>
#include "breakpad_googletest_includes.h"
#include "common/using_std_string.h"
#include "google_breakpad/common/minidump_format.h"
#include "google_breakpad/processor/basic_source_line_resolver.h"
#include "google_breakpad/processor/call_stack.h"
#include "google_breakpad/processor/code_module.h"
#include "google_breakpad/processor/source_line_resolver_interface.h"
#include "google_breakpad/processor/stack_frame.h"
#include "processor/stackwalker_unittest_utils.h"
#include "processor/stackwalker_address_list.h"
using google_breakpad::BasicSourceLineResolver;
using google_breakpad::CallStack;
using google_breakpad::CodeModule;
using google_breakpad::StackFrameSymbolizer;
using google_breakpad::StackFrame;
using google_breakpad::Stackwalker;
using google_breakpad::StackwalkerAddressList;
using std::vector;
using testing::_;
using testing::AnyNumber;
using testing::Return;
using testing::SetArgumentPointee;
#define arraysize(f) (sizeof(f) / sizeof(*f))
// Addresses and sizes of a couple dummy modules.
uint64_t kModule1Base = 0x40000000;
uint64_t kModule1Size = 0x10000;
uint64_t kModule2Base = 0x50000000;
uint64_t kModule2Size = 0x10000;
// A handful of addresses that lie within the modules above.
const uint64_t kDummyFrames[] = {
0x50003000, 0x50002000, 0x50001000, 0x40002000, 0x40001000 };
class StackwalkerAddressListTest : public testing::Test {
public:
StackwalkerAddressListTest()
: // Give the two modules reasonable standard locations and names
// for tests to play with.
module1(kModule1Base, kModule1Size, "module1", "version1"),
module2(kModule2Base, kModule2Size, "module2", "version2") {
// Create some modules with some stock debugging information.
modules.Add(&module1);
modules.Add(&module2);
// By default, none of the modules have symbol info; call
// SetModuleSymbols to override this.
EXPECT_CALL(supplier, GetCStringSymbolData(_, _, _, _, _))
.WillRepeatedly(Return(MockSymbolSupplier::NOT_FOUND));
// Avoid GMOCK WARNING "Uninteresting mock function call - returning
// directly" for FreeSymbolData().
EXPECT_CALL(supplier, FreeSymbolData(_)).Times(AnyNumber());
}
// Set the Breakpad symbol information that supplier should return for
// MODULE to INFO.
void SetModuleSymbols(MockCodeModule *module, const string &info) {
size_t buffer_size;
char *buffer = supplier.CopySymbolDataAndOwnTheCopy(info, &buffer_size);
EXPECT_CALL(supplier, GetCStringSymbolData(module, NULL, _, _, _))
.WillRepeatedly(DoAll(SetArgumentPointee<3>(buffer),
SetArgumentPointee<4>(buffer_size),
Return(MockSymbolSupplier::FOUND)));
}
void CheckCallStack(const CallStack& call_stack) {
const std::vector<StackFrame*>* frames = call_stack.frames();
ASSERT_EQ(arraysize(kDummyFrames), frames->size());
for (size_t i = 0; i < arraysize(kDummyFrames); ++i) {
ASSERT_EQ(kDummyFrames[i], frames->at(i)->instruction);
ASSERT_EQ(StackFrame::FRAME_TRUST_PREWALKED, frames->at(i)->trust);
}
ASSERT_EQ(static_cast<const CodeModule*>(&module2), frames->at(0)->module);
ASSERT_EQ(static_cast<const CodeModule*>(&module2), frames->at(1)->module);
ASSERT_EQ(static_cast<const CodeModule*>(&module2), frames->at(2)->module);
ASSERT_EQ(static_cast<const CodeModule*>(&module1), frames->at(3)->module);
ASSERT_EQ(static_cast<const CodeModule*>(&module1), frames->at(4)->module);
}
MockCodeModule module1;
MockCodeModule module2;
MockCodeModules modules;
MockSymbolSupplier supplier;
BasicSourceLineResolver resolver;
};
TEST_F(StackwalkerAddressListTest, ScanWithoutSymbols) {
StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
StackwalkerAddressList walker(kDummyFrames, arraysize(kDummyFrames),
&modules, &frame_symbolizer);
CallStack call_stack;
vector<const CodeModule*> modules_without_symbols;
vector<const CodeModule*> modules_with_corrupt_symbols;
ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols,
&modules_with_corrupt_symbols));
// The stack starts in module2, so we expect that to be the first module
// found without symbols.
ASSERT_EQ(2U, modules_without_symbols.size());
ASSERT_EQ("module2", modules_without_symbols[0]->debug_file());
ASSERT_EQ("module1", modules_without_symbols[1]->debug_file());
ASSERT_EQ(0u, modules_with_corrupt_symbols.size());
ASSERT_NO_FATAL_FAILURE(CheckCallStack(call_stack));
}
TEST_F(StackwalkerAddressListTest, ScanWithSymbols) {
// File : FILE number(dex) name
// Function: FUNC address(hex) size(hex) parameter_size(hex) name
// Line : address(hex) size(hex) line(dec) filenum(dec)
SetModuleSymbols(&module2,
"FILE 1 module2.cc\n"
"FUNC 3000 100 10 mod2func3\n"
"3000 10 1 1\n"
"FUNC 2000 200 10 mod2func2\n"
"FUNC 1000 300 10 mod2func1\n");
SetModuleSymbols(&module1,
"FUNC 2000 200 10 mod1func2\n"
"FUNC 1000 300 10 mod1func1\n");
StackFrameSymbolizer frame_symbolizer(&supplier, &resolver);
StackwalkerAddressList walker(kDummyFrames, arraysize(kDummyFrames),
&modules, &frame_symbolizer);
CallStack call_stack;
vector<const CodeModule*> modules_without_symbols;
vector<const CodeModule*> modules_with_corrupt_symbols;
ASSERT_TRUE(walker.Walk(&call_stack, &modules_without_symbols,
&modules_with_corrupt_symbols));
ASSERT_EQ(0u, modules_without_symbols.size());
ASSERT_EQ(0u, modules_with_corrupt_symbols.size());
ASSERT_NO_FATAL_FAILURE(CheckCallStack(call_stack));
const std::vector<StackFrame*>* frames = call_stack.frames();
// We have full file/line information for the first function call.
ASSERT_EQ("mod2func3", frames->at(0)->function_name);
ASSERT_EQ(0x50003000u, frames->at(0)->function_base);
ASSERT_EQ("module2.cc", frames->at(0)->source_file_name);
ASSERT_EQ(1, frames->at(0)->source_line);
ASSERT_EQ(0x50003000u, frames->at(0)->source_line_base);
ASSERT_EQ("mod2func2", frames->at(1)->function_name);
ASSERT_EQ(0x50002000u, frames->at(1)->function_base);
ASSERT_EQ("mod2func1", frames->at(2)->function_name);
ASSERT_EQ(0x50001000u, frames->at(2)->function_base);
ASSERT_EQ("mod1func2", frames->at(3)->function_name);
ASSERT_EQ(0x40002000u, frames->at(3)->function_base);
ASSERT_EQ("mod1func1", frames->at(4)->function_name);
ASSERT_EQ(0x40001000u, frames->at(4)->function_base);
}