- 根目录:
- tools
- perf
- util
- annotate.c
/*
* Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Parts came from builtin-annotate.c, see those files for further
* copyright notes.
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "util.h"
#include "ui/ui.h"
#include "sort.h"
#include "build-id.h"
#include "color.h"
#include "cache.h"
#include "symbol.h"
#include "debug.h"
#include "annotate.h"
#include "evsel.h"
#include <regex.h>
#include <pthread.h>
#include <linux/bitops.h>
const char *disassembler_style;
const char *objdump_path;
static regex_t file_lineno;
static struct ins *ins__find(const char *name);
static int disasm_line__parse(char *line, char **namep, char **rawp);
static void ins__delete(struct ins_operands *ops)
{
if (ops == NULL)
return;
zfree(&ops->source.raw);
zfree(&ops->source.name);
zfree(&ops->target.raw);
zfree(&ops->target.name);
}
static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
}
int ins__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
if (ins->ops->scnprintf)
return ins->ops->scnprintf(ins, bf, size, ops);
return ins__raw_scnprintf(ins, bf, size, ops);
}
static int call__parse(struct ins_operands *ops)
{
char *endptr, *tok, *name;
ops->target.addr = strtoull(ops->raw, &endptr, 16);
name = strchr(endptr, '<');
if (name == NULL)
goto indirect_call;
name++;
tok = strchr(name, '>');
if (tok == NULL)
return -1;
*tok = '\0';
ops->target.name = strdup(name);
*tok = '>';
return ops->target.name == NULL ? -1 : 0;
indirect_call:
tok = strchr(endptr, '(');
if (tok != NULL) {
ops->target.addr = 0;
return 0;
}
tok = strchr(endptr, '*');
if (tok == NULL)
return -1;
ops->target.addr = strtoull(tok + 1, NULL, 16);
return 0;
}
static int call__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
if (ops->target.name)
return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
if (ops->target.addr == 0)
return ins__raw_scnprintf(ins, bf, size, ops);
return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
}
static struct ins_ops call_ops = {
.parse = call__parse,
.scnprintf = call__scnprintf,
};
bool ins__is_call(const struct ins *ins)
{
return ins->ops == &call_ops;
}
static int jump__parse(struct ins_operands *ops)
{
const char *s = strchr(ops->raw, '+');
ops->target.addr = strtoull(ops->raw, NULL, 16);
if (s++ != NULL)
ops->target.offset = strtoull(s, NULL, 16);
else
ops->target.offset = UINT64_MAX;
return 0;
}
static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset);
}
static struct ins_ops jump_ops = {
.parse = jump__parse,
.scnprintf = jump__scnprintf,
};
bool ins__is_jump(const struct ins *ins)
{
return ins->ops == &jump_ops;
}
static int comment__symbol(char *raw, char *comment, u64 *addrp, char **namep)
{
char *endptr, *name, *t;
if (strstr(raw, "(%rip)") == NULL)
return 0;
*addrp = strtoull(comment, &endptr, 16);
name = strchr(endptr, '<');
if (name == NULL)
return -1;
name++;
t = strchr(name, '>');
if (t == NULL)
return 0;
*t = '\0';
*namep = strdup(name);
*t = '>';
return 0;
}
static int lock__parse(struct ins_operands *ops)
{
char *name;
ops->locked.ops = zalloc(sizeof(*ops->locked.ops));
if (ops->locked.ops == NULL)
return 0;
if (disasm_line__parse(ops->raw, &name, &ops->locked.ops->raw) < 0)
goto out_free_ops;
ops->locked.ins = ins__find(name);
free(name);
if (ops->locked.ins == NULL)
goto out_free_ops;
if (!ops->locked.ins->ops)
return 0;
if (ops->locked.ins->ops->parse &&
ops->locked.ins->ops->parse(ops->locked.ops) < 0)
goto out_free_ops;
return 0;
out_free_ops:
zfree(&ops->locked.ops);
return 0;
}
static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
int printed;
if (ops->locked.ins == NULL)
return ins__raw_scnprintf(ins, bf, size, ops);
printed = scnprintf(bf, size, "%-6.6s ", ins->name);
return printed + ins__scnprintf(ops->locked.ins, bf + printed,
size - printed, ops->locked.ops);
}
static void lock__delete(struct ins_operands *ops)
{
struct ins *ins = ops->locked.ins;
if (ins && ins->ops->free)
ins->ops->free(ops->locked.ops);
else
ins__delete(ops->locked.ops);
zfree(&ops->locked.ops);
zfree(&ops->target.raw);
zfree(&ops->target.name);
}
static struct ins_ops lock_ops = {
.free = lock__delete,
.parse = lock__parse,
.scnprintf = lock__scnprintf,
};
static int mov__parse(struct ins_operands *ops)
{
char *s = strchr(ops->raw, ','), *target, *comment, prev;
if (s == NULL)
return -1;
*s = '\0';
ops->source.raw = strdup(ops->raw);
*s = ',';
if (ops->source.raw == NULL)
return -1;
target = ++s;
comment = strchr(s, '#');
if (comment != NULL)
s = comment - 1;
else
s = strchr(s, '\0') - 1;
while (s > target && isspace(s[0]))
--s;
s++;
prev = *s;
*s = '\0';
ops->target.raw = strdup(target);
*s = prev;
if (ops->target.raw == NULL)
goto out_free_source;
if (comment == NULL)
return 0;
while (comment[0] != '\0' && isspace(comment[0]))
++comment;
comment__symbol(ops->source.raw, comment, &ops->source.addr, &ops->source.name);
comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
return 0;
out_free_source:
zfree(&ops->source.raw);
return -1;
}
static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
ops->source.name ?: ops->source.raw,
ops->target.name ?: ops->target.raw);
}
static struct ins_ops mov_ops = {
.parse = mov__parse,
.scnprintf = mov__scnprintf,
};
static int dec__parse(struct ins_operands *ops)
{
char *target, *comment, *s, prev;
target = s = ops->raw;
while (s[0] != '\0' && !isspace(s[0]))
++s;
prev = *s;
*s = '\0';
ops->target.raw = strdup(target);
*s = prev;
if (ops->target.raw == NULL)
return -1;
comment = strchr(s, '#');
if (comment == NULL)
return 0;
while (comment[0] != '\0' && isspace(comment[0]))
++comment;
comment__symbol(ops->target.raw, comment, &ops->target.addr, &ops->target.name);
return 0;
}
static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
return scnprintf(bf, size, "%-6.6s %s", ins->name,
ops->target.name ?: ops->target.raw);
}
static struct ins_ops dec_ops = {
.parse = dec__parse,
.scnprintf = dec__scnprintf,
};
static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
struct ins_operands *ops __maybe_unused)
{
return scnprintf(bf, size, "%-6.6s", "nop");
}
static struct ins_ops nop_ops = {
.scnprintf = nop__scnprintf,
};
/*
* Must be sorted by name!
*/
static struct ins instructions[] = {
{ .name = "add", .ops = &mov_ops, },
{ .name = "addl", .ops = &mov_ops, },
{ .name = "addq", .ops = &mov_ops, },
{ .name = "addw", .ops = &mov_ops, },
{ .name = "and", .ops = &mov_ops, },
{ .name = "bts", .ops = &mov_ops, },
{ .name = "call", .ops = &call_ops, },
{ .name = "callq", .ops = &call_ops, },
{ .name = "cmp", .ops = &mov_ops, },
{ .name = "cmpb", .ops = &mov_ops, },
{ .name = "cmpl", .ops = &mov_ops, },
{ .name = "cmpq", .ops = &mov_ops, },
{ .name = "cmpw", .ops = &mov_ops, },
{ .name = "cmpxch", .ops = &mov_ops, },
{ .name = "dec", .ops = &dec_ops, },
{ .name = "decl", .ops = &dec_ops, },
{ .name = "imul", .ops = &mov_ops, },
{ .name = "inc", .ops = &dec_ops, },
{ .name = "incl", .ops = &dec_ops, },
{ .name = "ja", .ops = &jump_ops, },
{ .name = "jae", .ops = &jump_ops, },
{ .name = "jb", .ops = &jump_ops, },
{ .name = "jbe", .ops = &jump_ops, },
{ .name = "jc", .ops = &jump_ops, },
{ .name = "jcxz", .ops = &jump_ops, },
{ .name = "je", .ops = &jump_ops, },
{ .name = "jecxz", .ops = &jump_ops, },
{ .name = "jg", .ops = &jump_ops, },
{ .name = "jge", .ops = &jump_ops, },
{ .name = "jl", .ops = &jump_ops, },
{ .name = "jle", .ops = &jump_ops, },
{ .name = "jmp", .ops = &jump_ops, },
{ .name = "jmpq", .ops = &jump_ops, },
{ .name = "jna", .ops = &jump_ops, },
{ .name = "jnae", .ops = &jump_ops, },
{ .name = "jnb", .ops = &jump_ops, },
{ .name = "jnbe", .ops = &jump_ops, },
{ .name = "jnc", .ops = &jump_ops, },
{ .name = "jne", .ops = &jump_ops, },
{ .name = "jng", .ops = &jump_ops, },
{ .name = "jnge", .ops = &jump_ops, },
{ .name = "jnl", .ops = &jump_ops, },
{ .name = "jnle", .ops = &jump_ops, },
{ .name = "jno", .ops = &jump_ops, },
{ .name = "jnp", .ops = &jump_ops, },
{ .name = "jns", .ops = &jump_ops, },
{ .name = "jnz", .ops = &jump_ops, },
{ .name = "jo", .ops = &jump_ops, },
{ .name = "jp", .ops = &jump_ops, },
{ .name = "jpe", .ops = &jump_ops, },
{ .name = "jpo", .ops = &jump_ops, },
{ .name = "jrcxz", .ops = &jump_ops, },
{ .name = "js", .ops = &jump_ops, },
{ .name = "jz", .ops = &jump_ops, },
{ .name = "lea", .ops = &mov_ops, },
{ .name = "lock", .ops = &lock_ops, },
{ .name = "mov", .ops = &mov_ops, },
{ .name = "movb", .ops = &mov_ops, },
{ .name = "movdqa",.ops = &mov_ops, },
{ .name = "movl", .ops = &mov_ops, },
{ .name = "movq", .ops = &mov_ops, },
{ .name = "movslq", .ops = &mov_ops, },
{ .name = "movzbl", .ops = &mov_ops, },
{ .name = "movzwl", .ops = &mov_ops, },
{ .name = "nop", .ops = &nop_ops, },
{ .name = "nopl", .ops = &nop_ops, },
{ .name = "nopw", .ops = &nop_ops, },
{ .name = "or", .ops = &mov_ops, },
{ .name = "orl", .ops = &mov_ops, },
{ .name = "test", .ops = &mov_ops, },
{ .name = "testb", .ops = &mov_ops, },
{ .name = "testl", .ops = &mov_ops, },
{ .name = "xadd", .ops = &mov_ops, },
{ .name = "xbeginl", .ops = &jump_ops, },
{ .name = "xbeginq", .ops = &jump_ops, },
};
static int ins__cmp(const void *name, const void *insp)
{
const struct ins *ins = insp;
return strcmp(name, ins->name);
}
static struct ins *ins__find(const char *name)
{
const int nmemb = ARRAY_SIZE(instructions);
return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
}
int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
pthread_mutex_init(¬es->lock, NULL);
return 0;
}
int symbol__alloc_hist(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
const size_t size = symbol__size(sym);
size_t sizeof_sym_hist;
/* Check for overflow when calculating sizeof_sym_hist */
if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(u64))
return -1;
sizeof_sym_hist = (sizeof(struct sym_hist) + size * sizeof(u64));
/* Check for overflow in zalloc argument */
if (sizeof_sym_hist > (SIZE_MAX - sizeof(*notes->src))
/ symbol_conf.nr_events)
return -1;
notes->src = zalloc(sizeof(*notes->src) + symbol_conf.nr_events * sizeof_sym_hist);
if (notes->src == NULL)
return -1;
notes->src->sizeof_sym_hist = sizeof_sym_hist;
notes->src->nr_histograms = symbol_conf.nr_events;
INIT_LIST_HEAD(¬es->src->source);
return 0;
}
/* The cycles histogram is lazily allocated. */
static int symbol__alloc_hist_cycles(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
const size_t size = symbol__size(sym);
notes->src->cycles_hist = calloc(size, sizeof(struct cyc_hist));
if (notes->src->cycles_hist == NULL)
return -1;
return 0;
}
void symbol__annotate_zero_histograms(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
pthread_mutex_lock(¬es->lock);
if (notes->src != NULL) {
memset(notes->src->histograms, 0,
notes->src->nr_histograms * notes->src->sizeof_sym_hist);
if (notes->src->cycles_hist)
memset(notes->src->cycles_hist, 0,
symbol__size(sym) * sizeof(struct cyc_hist));
}
pthread_mutex_unlock(¬es->lock);
}
static int __symbol__account_cycles(struct annotation *notes,
u64 start,
unsigned offset, unsigned cycles,
unsigned have_start)
{
struct cyc_hist *ch;
ch = notes->src->cycles_hist;
/*
* For now we can only account one basic block per
* final jump. But multiple could be overlapping.
* Always account the longest one. So when
* a shorter one has been already seen throw it away.
*
* We separately always account the full cycles.
*/
ch[offset].num_aggr++;
ch[offset].cycles_aggr += cycles;
if (!have_start && ch[offset].have_start)
return 0;
if (ch[offset].num) {
if (have_start && (!ch[offset].have_start ||
ch[offset].start > start)) {
ch[offset].have_start = 0;
ch[offset].cycles = 0;
ch[offset].num = 0;
if (ch[offset].reset < 0xffff)
ch[offset].reset++;
} else if (have_start &&
ch[offset].start < start)
return 0;
}
ch[offset].have_start = have_start;
ch[offset].start = start;
ch[offset].cycles += cycles;
ch[offset].num++;
return 0;
}
static int __symbol__inc_addr_samples(struct symbol *sym, struct map *map,
struct annotation *notes, int evidx, u64 addr)
{
unsigned offset;
struct sym_hist *h;
pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map->unmap_ip(map, addr));
if (addr < sym->start || addr >= sym->end) {
pr_debug("%s(%d): ERANGE! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 "\n",
__func__, __LINE__, sym->name, sym->start, addr, sym->end);
return -ERANGE;
}
offset = addr - sym->start;
h = annotation__histogram(notes, evidx);
h->sum++;
h->addr[offset]++;
pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64
", evidx=%d] => %" PRIu64 "\n", sym->start, sym->name,
addr, addr - sym->start, evidx, h->addr[offset]);
return 0;
}
static struct annotation *symbol__get_annotation(struct symbol *sym, bool cycles)
{
struct annotation *notes = symbol__annotation(sym);
if (notes->src == NULL) {
if (symbol__alloc_hist(sym) < 0)
return NULL;
}
if (!notes->src->cycles_hist && cycles) {
if (symbol__alloc_hist_cycles(sym) < 0)
return NULL;
}
return notes;
}
static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
int evidx, u64 addr)
{
struct annotation *notes;
if (sym == NULL)
return 0;
notes = symbol__get_annotation(sym, false);
if (notes == NULL)
return -ENOMEM;
return __symbol__inc_addr_samples(sym, map, notes, evidx, addr);
}
static int symbol__account_cycles(u64 addr, u64 start,
struct symbol *sym, unsigned cycles)
{
struct annotation *notes;
unsigned offset;
if (sym == NULL)
return 0;
notes = symbol__get_annotation(sym, true);
if (notes == NULL)
return -ENOMEM;
if (addr < sym->start || addr >= sym->end)
return -ERANGE;
if (start) {
if (start < sym->start || start >= sym->end)
return -ERANGE;
if (start >= addr)
start = 0;
}
offset = addr - sym->start;
return __symbol__account_cycles(notes,
start ? start - sym->start : 0,
offset, cycles,
!!start);
}
int addr_map_symbol__account_cycles(struct addr_map_symbol *ams,
struct addr_map_symbol *start,
unsigned cycles)
{
u64 saddr = 0;
int err;
if (!cycles)
return 0;
/*
* Only set start when IPC can be computed. We can only
* compute it when the basic block is completely in a single
* function.
* Special case the case when the jump is elsewhere, but
* it starts on the function start.
*/
if (start &&
(start->sym == ams->sym ||
(ams->sym &&
start->addr == ams->sym->start + ams->map->start)))
saddr = start->al_addr;
if (saddr == 0)
pr_debug2("BB with bad start: addr %"PRIx64" start %"PRIx64" sym %"PRIx64" saddr %"PRIx64"\n",
ams->addr,
start ? start->addr : 0,
ams->sym ? ams->sym->start + ams->map->start : 0,
saddr);
err = symbol__account_cycles(ams->al_addr, saddr, ams->sym, cycles);
if (err)
pr_debug2("account_cycles failed %d\n", err);
return err;
}
int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, int evidx)
{
return symbol__inc_addr_samples(ams->sym, ams->map, evidx, ams->al_addr);
}
int hist_entry__inc_addr_samples(struct hist_entry *he, int evidx, u64 ip)
{
return symbol__inc_addr_samples(he->ms.sym, he->ms.map, evidx, ip);
}
static void disasm_line__init_ins(struct disasm_line *dl)
{
dl->ins = ins__find(dl->name);
if (dl->ins == NULL)
return;
if (!dl->ins->ops)
return;
if (dl->ins->ops->parse && dl->ins->ops->parse(&dl->ops) < 0)
dl->ins = NULL;
}
static int disasm_line__parse(char *line, char **namep, char **rawp)
{
char *name = line, tmp;
while (isspace(name[0]))
++name;
if (name[0] == '\0')
return -1;
*rawp = name + 1;
while ((*rawp)[0] != '\0' && !isspace((*rawp)[0]))
++*rawp;
tmp = (*rawp)[0];
(*rawp)[0] = '\0';
*namep = strdup(name);
if (*namep == NULL)
goto out_free_name;
(*rawp)[0] = tmp;
if ((*rawp)[0] != '\0') {
(*rawp)++;
while (isspace((*rawp)[0]))
++(*rawp);
}
return 0;
out_free_name:
zfree(namep);
return -1;
}
static struct disasm_line *disasm_line__new(s64 offset, char *line,
size_t privsize, int line_nr)
{
struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
if (dl != NULL) {
dl->offset = offset;
dl->line = strdup(line);
dl->line_nr = line_nr;
if (dl->line == NULL)
goto out_delete;
if (offset != -1) {
if (disasm_line__parse(dl->line, &dl->name, &dl->ops.raw) < 0)
goto out_free_line;
disasm_line__init_ins(dl);
}
}
return dl;
out_free_line:
zfree(&dl->line);
out_delete:
free(dl);
return NULL;
}
void disasm_line__free(struct disasm_line *dl)
{
zfree(&dl->line);
zfree(&dl->name);
if (dl->ins && dl->ins->ops->free)
dl->ins->ops->free(&dl->ops);
else
ins__delete(&dl->ops);
free(dl);
}
int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
{
if (raw || !dl->ins)
return scnprintf(bf, size, "%-6.6s %s", dl->name, dl->ops.raw);
return ins__scnprintf(dl->ins, bf, size, &dl->ops);
}
static void disasm__add(struct list_head *head, struct disasm_line *line)
{
list_add_tail(&line->node, head);
}
struct disasm_line *disasm__get_next_ip_line(struct list_head *head, struct disasm_line *pos)
{
list_for_each_entry_continue(pos, head, node)
if (pos->offset >= 0)
return pos;
return NULL;
}
double disasm__calc_percent(struct annotation *notes, int evidx, s64 offset,
s64 end, const char **path, u64 *nr_samples)
{
struct source_line *src_line = notes->src->lines;
double percent = 0.0;
*nr_samples = 0;
if (src_line) {
size_t sizeof_src_line = sizeof(*src_line) +
sizeof(src_line->samples) * (src_line->nr_pcnt - 1);
while (offset < end) {
src_line = (void *)notes->src->lines +
(sizeof_src_line * offset);
if (*path == NULL)
*path = src_line->path;
percent += src_line->samples[evidx].percent;
*nr_samples += src_line->samples[evidx].nr;
offset++;
}
} else {
struct sym_hist *h = annotation__histogram(notes, evidx);
unsigned int hits = 0;
while (offset < end)
hits += h->addr[offset++];
if (h->sum) {
*nr_samples = hits;
percent = 100.0 * hits / h->sum;
}
}
return percent;
}
static int disasm_line__print(struct disasm_line *dl, struct symbol *sym, u64 start,
struct perf_evsel *evsel, u64 len, int min_pcnt, int printed,
int max_lines, struct disasm_line *queue)
{
static const char *prev_line;
static const char *prev_color;
if (dl->offset != -1) {
const char *path = NULL;
u64 nr_samples;
double percent, max_percent = 0.0;
double *ppercents = &percent;
u64 *psamples = &nr_samples;
int i, nr_percent = 1;
const char *color;
struct annotation *notes = symbol__annotation(sym);
s64 offset = dl->offset;
const u64 addr = start + offset;
struct disasm_line *next;
next = disasm__get_next_ip_line(¬es->src->source, dl);
if (perf_evsel__is_group_event(evsel)) {
nr_percent = evsel->nr_members;
ppercents = calloc(nr_percent, sizeof(double));
psamples = calloc(nr_percent, sizeof(u64));
if (ppercents == NULL || psamples == NULL) {
return -1;
}
}
for (i = 0; i < nr_percent; i++) {
percent = disasm__calc_percent(notes,
notes->src->lines ? i : evsel->idx + i,
offset,
next ? next->offset : (s64) len,
&path, &nr_samples);
ppercents[i] = percent;
psamples[i] = nr_samples;
if (percent > max_percent)
max_percent = percent;
}
if (max_percent < min_pcnt)
return -1;
if (max_lines && printed >= max_lines)
return 1;
if (queue != NULL) {
list_for_each_entry_from(queue, ¬es->src->source, node) {
if (queue == dl)
break;
disasm_line__print(queue, sym, start, evsel, len,
0, 0, 1, NULL);
}
}
color = get_percent_color(max_percent);
/*
* Also color the filename and line if needed, with
* the same color than the percentage. Don't print it
* twice for close colored addr with the same filename:line
*/
if (path) {
if (!prev_line || strcmp(prev_line, path)
|| color != prev_color) {
color_fprintf(stdout, color, " %s", path);
prev_line = path;
prev_color = color;
}
}
for (i = 0; i < nr_percent; i++) {
percent = ppercents[i];
nr_samples = psamples[i];
color = get_percent_color(percent);
if (symbol_conf.show_total_period)
color_fprintf(stdout, color, " %7" PRIu64,
nr_samples);
else
color_fprintf(stdout, color, " %7.2f", percent);
}
printf(" : ");
color_fprintf(stdout, PERF_COLOR_MAGENTA, " %" PRIx64 ":", addr);
color_fprintf(stdout, PERF_COLOR_BLUE, "%s\n", dl->line);
if (ppercents != &percent)
free(ppercents);
if (psamples != &nr_samples)
free(psamples);
} else if (max_lines && printed >= max_lines)
return 1;
else {
int width = 8;
if (queue)
return -1;
if (perf_evsel__is_group_event(evsel))
width *= evsel->nr_members;
if (!*dl->line)
printf(" %*s:\n", width, " ");
else
printf(" %*s: %s\n", width, " ", dl->line);
}
return 0;
}
/*
* symbol__parse_objdump_line() parses objdump output (with -d --no-show-raw)
* which looks like following
*
* 0000000000415500 <_init>:
* 415500: sub $0x8,%rsp
* 415504: mov 0x2f5ad5(%rip),%rax # 70afe0 <_DYNAMIC+0x2f8>
* 41550b: test %rax,%rax
* 41550e: je 415515 <_init+0x15>
* 415510: callq 416e70 <__gmon_start__@plt>
* 415515: add $0x8,%rsp
* 415519: retq
*
* it will be parsed and saved into struct disasm_line as
* <offset> <name> <ops.raw>
*
* The offset will be a relative offset from the start of the symbol and -1
* means that it's not a disassembly line so should be treated differently.
* The ops.raw part will be parsed further according to type of the instruction.
*/
static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
FILE *file, size_t privsize,
int *line_nr)
{
struct annotation *notes = symbol__annotation(sym);
struct disasm_line *dl;
char *line = NULL, *parsed_line, *tmp, *tmp2, *c;
size_t line_len;
s64 line_ip, offset = -1;
regmatch_t match[2];
if (getline(&line, &line_len, file) < 0)
return -1;
if (!line)
return -1;
while (line_len != 0 && isspace(line[line_len - 1]))
line[--line_len] = '\0';
c = strchr(line, '\n');
if (c)
*c = 0;
line_ip = -1;
parsed_line = line;
/* /filename:linenr ? Save line number and ignore. */
if (regexec(&file_lineno, line, 2, match, 0) == 0) {
*line_nr = atoi(line + match[1].rm_so);
return 0;
}
/*
* Strip leading spaces:
*/
tmp = line;
while (*tmp) {
if (*tmp != ' ')
break;
tmp++;
}
if (*tmp) {
/*
* Parse hexa addresses followed by ':'
*/
line_ip = strtoull(tmp, &tmp2, 16);
if (*tmp2 != ':' || tmp == tmp2 || tmp2[1] == '\0')
line_ip = -1;
}
if (line_ip != -1) {
u64 start = map__rip_2objdump(map, sym->start),
end = map__rip_2objdump(map, sym->end);
offset = line_ip - start;
if ((u64)line_ip < start || (u64)line_ip >= end)
offset = -1;
else
parsed_line = tmp2 + 1;
}
dl = disasm_line__new(offset, parsed_line, privsize, *line_nr);
free(line);
(*line_nr)++;
if (dl == NULL)
return -1;
if (dl->ops.target.offset == UINT64_MAX)
dl->ops.target.offset = dl->ops.target.addr -
map__rip_2objdump(map, sym->start);
/* kcore has no symbols, so add the call target name */
if (dl->ins && ins__is_call(dl->ins) && !dl->ops.target.name) {
struct addr_map_symbol target = {
.map = map,
.addr = dl->ops.target.addr,
};
if (!map_groups__find_ams(&target, NULL) &&
target.sym->start == target.al_addr)
dl->ops.target.name = strdup(target.sym->name);
}
disasm__add(¬es->src->source, dl);
return 0;
}
static __attribute__((constructor)) void symbol__init_regexpr(void)
{
regcomp(&file_lineno, "^/[^:]+:([0-9]+)", REG_EXTENDED);
}
static void delete_last_nop(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
struct list_head *list = ¬es->src->source;
struct disasm_line *dl;
while (!list_empty(list)) {
dl = list_entry(list->prev, struct disasm_line, node);
if (dl->ins && dl->ins->ops) {
if (dl->ins->ops != &nop_ops)
return;
} else {
if (!strstr(dl->line, " nop ") &&
!strstr(dl->line, " nopl ") &&
!strstr(dl->line, " nopw "))
return;
}
list_del(&dl->node);
disasm_line__free(dl);
}
}
int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
{
struct dso *dso = map->dso;
char *filename = dso__build_id_filename(dso, NULL, 0);
bool free_filename = true;
char command[PATH_MAX * 2];
FILE *file;
int err = 0;
char symfs_filename[PATH_MAX];
struct kcore_extract kce;
bool delete_extract = false;
int lineno = 0;
int nline;
if (filename)
symbol__join_symfs(symfs_filename, filename);
if (filename == NULL) {
if (dso->has_build_id) {
pr_err("Can't annotate %s: not enough memory\n",
sym->name);
return -ENOMEM;
}
goto fallback;
} else if (dso__is_kcore(dso)) {
goto fallback;
} else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
strstr(command, "[kernel.kallsyms]") ||
access(symfs_filename, R_OK)) {
free(filename);
fallback:
/*
* If we don't have build-ids or the build-id file isn't in the
* cache, or is just a kallsyms file, well, lets hope that this
* DSO is the same as when 'perf record' ran.
*/
filename = (char *)dso->long_name;
symbol__join_symfs(symfs_filename, filename);
free_filename = false;
}
if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
!dso__is_kcore(dso)) {
char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
char *build_id_msg = NULL;
if (dso->annotate_warned)
goto out_free_filename;
if (dso->has_build_id) {
build_id__sprintf(dso->build_id,
sizeof(dso->build_id), bf + 15);
build_id_msg = bf;
}
err = -ENOENT;
dso->annotate_warned = 1;
pr_err("Can't annotate %s:\n\n"
"No vmlinux file%s\nwas found in the path.\n\n"
"Note that annotation using /proc/kcore requires CAP_SYS_RAWIO capability.\n\n"
"Please use:\n\n"
" perf buildid-cache -vu vmlinux\n\n"
"or:\n\n"
" --vmlinux vmlinux\n",
sym->name, build_id_msg ?: "");
goto out_free_filename;
}
pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
filename, sym->name, map->unmap_ip(map, sym->start),
map->unmap_ip(map, sym->end));
pr_debug("annotating [%p] %30s : [%p] %30s\n",
dso, dso->long_name, sym, sym->name);
if (dso__is_kcore(dso)) {
kce.kcore_filename = symfs_filename;
kce.addr = map__rip_2objdump(map, sym->start);
kce.offs = sym->start;
kce.len = sym->end - sym->start;
if (!kcore_extract__create(&kce)) {
delete_extract = true;
strlcpy(symfs_filename, kce.extract_filename,
sizeof(symfs_filename));
if (free_filename) {
free(filename);
free_filename = false;
}
filename = symfs_filename;
}
} else if (dso__needs_decompress(dso)) {
char tmp[PATH_MAX];
struct kmod_path m;
int fd;
bool ret;
if (kmod_path__parse_ext(&m, symfs_filename))
goto out_free_filename;
snprintf(tmp, PATH_MAX, "/tmp/perf-kmod-XXXXXX");
fd = mkstemp(tmp);
if (fd < 0) {
free(m.ext);
goto out_free_filename;
}
ret = decompress_to_file(m.ext, symfs_filename, fd);
if (ret)
pr_err("Cannot decompress %s %s\n", m.ext, symfs_filename);
free(m.ext);
close(fd);
if (!ret)
goto out_free_filename;
strcpy(symfs_filename, tmp);
}
snprintf(command, sizeof(command),
"%s %s%s --start-address=0x%016" PRIx64
" --stop-address=0x%016" PRIx64
" -l -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
objdump_path ? objdump_path : "objdump",
disassembler_style ? "-M " : "",
disassembler_style ? disassembler_style : "",
map__rip_2objdump(map, sym->start),
map__rip_2objdump(map, sym->end),
symbol_conf.annotate_asm_raw ? "" : "--no-show-raw",
symbol_conf.annotate_src ? "-S" : "",
symfs_filename, filename);
pr_debug("Executing: %s\n", command);
file = popen(command, "r");
if (!file) {
pr_err("Failure running %s\n", command);
/*
* If we were using debug info should retry with
* original binary.
*/
goto out_remove_tmp;
}
nline = 0;
while (!feof(file)) {
if (symbol__parse_objdump_line(sym, map, file, privsize,
&lineno) < 0)
break;
nline++;
}
if (nline == 0)
pr_err("No output from %s\n", command);
/*
* kallsyms does not have symbol sizes so there may a nop at the end.
* Remove it.
*/
if (dso__is_kcore(dso))
delete_last_nop(sym);
pclose(file);
out_remove_tmp:
if (dso__needs_decompress(dso))
unlink(symfs_filename);
out_free_filename:
if (delete_extract)
kcore_extract__delete(&kce);
if (free_filename)
free(filename);
return err;
}
static void insert_source_line(struct rb_root *root, struct source_line *src_line)
{
struct source_line *iter;
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
int i, ret;
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct source_line, node);
ret = strcmp(iter->path, src_line->path);
if (ret == 0) {
for (i = 0; i < src_line->nr_pcnt; i++)
iter->samples[i].percent_sum += src_line->samples[i].percent;
return;
}
if (ret < 0)
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
for (i = 0; i < src_line->nr_pcnt; i++)
src_line->samples[i].percent_sum = src_line->samples[i].percent;
rb_link_node(&src_line->node, parent, p);
rb_insert_color(&src_line->node, root);
}
static int cmp_source_line(struct source_line *a, struct source_line *b)
{
int i;
for (i = 0; i < a->nr_pcnt; i++) {
if (a->samples[i].percent_sum == b->samples[i].percent_sum)
continue;
return a->samples[i].percent_sum > b->samples[i].percent_sum;
}
return 0;
}
static void __resort_source_line(struct rb_root *root, struct source_line *src_line)
{
struct source_line *iter;
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
while (*p != NULL) {
parent = *p;
iter = rb_entry(parent, struct source_line, node);
if (cmp_source_line(src_line, iter))
p = &(*p)->rb_left;
else
p = &(*p)->rb_right;
}
rb_link_node(&src_line->node, parent, p);
rb_insert_color(&src_line->node, root);
}
static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root)
{
struct source_line *src_line;
struct rb_node *node;
node = rb_first(src_root);
while (node) {
struct rb_node *next;
src_line = rb_entry(node, struct source_line, node);
next = rb_next(node);
rb_erase(node, src_root);
__resort_source_line(dest_root, src_line);
node = next;
}
}
static void symbol__free_source_line(struct symbol *sym, int len)
{
struct annotation *notes = symbol__annotation(sym);
struct source_line *src_line = notes->src->lines;
size_t sizeof_src_line;
int i;
sizeof_src_line = sizeof(*src_line) +
(sizeof(src_line->samples) * (src_line->nr_pcnt - 1));
for (i = 0; i < len; i++) {
free_srcline(src_line->path);
src_line = (void *)src_line + sizeof_src_line;
}
zfree(¬es->src->lines);
}
/* Get the filename:line for the colored entries */
static int symbol__get_source_line(struct symbol *sym, struct map *map,
struct perf_evsel *evsel,
struct rb_root *root, int len)
{
u64 start;
int i, k;
int evidx = evsel->idx;
struct source_line *src_line;
struct annotation *notes = symbol__annotation(sym);
struct sym_hist *h = annotation__histogram(notes, evidx);
struct rb_root tmp_root = RB_ROOT;
int nr_pcnt = 1;
u64 h_sum = h->sum;
size_t sizeof_src_line = sizeof(struct source_line);
if (perf_evsel__is_group_event(evsel)) {
for (i = 1; i < evsel->nr_members; i++) {
h = annotation__histogram(notes, evidx + i);
h_sum += h->sum;
}
nr_pcnt = evsel->nr_members;
sizeof_src_line += (nr_pcnt - 1) * sizeof(src_line->samples);
}
if (!h_sum)
return 0;
src_line = notes->src->lines = calloc(len, sizeof_src_line);
if (!notes->src->lines)
return -1;
start = map__rip_2objdump(map, sym->start);
for (i = 0; i < len; i++) {
u64 offset;
double percent_max = 0.0;
src_line->nr_pcnt = nr_pcnt;
for (k = 0; k < nr_pcnt; k++) {
h = annotation__histogram(notes, evidx + k);
src_line->samples[k].percent = 100.0 * h->addr[i] / h->sum;
if (src_line->samples[k].percent > percent_max)
percent_max = src_line->samples[k].percent;
}
if (percent_max <= 0.5)
goto next;
offset = start + i;
src_line->path = get_srcline(map->dso, offset, NULL, false);
insert_source_line(&tmp_root, src_line);
next:
src_line = (void *)src_line + sizeof_src_line;
}
resort_source_line(root, &tmp_root);
return 0;
}
static void print_summary(struct rb_root *root, const char *filename)
{
struct source_line *src_line;
struct rb_node *node;
printf("\nSorted summary for file %s\n", filename);
printf("----------------------------------------------\n\n");
if (RB_EMPTY_ROOT(root)) {
printf(" Nothing higher than %1.1f%%\n", MIN_GREEN);
return;
}
node = rb_first(root);
while (node) {
double percent, percent_max = 0.0;
const char *color;
char *path;
int i;
src_line = rb_entry(node, struct source_line, node);
for (i = 0; i < src_line->nr_pcnt; i++) {
percent = src_line->samples[i].percent_sum;
color = get_percent_color(percent);
color_fprintf(stdout, color, " %7.2f", percent);
if (percent > percent_max)
percent_max = percent;
}
path = src_line->path;
color = get_percent_color(percent_max);
color_fprintf(stdout, color, " %s\n", path);
node = rb_next(node);
}
}
static void symbol__annotate_hits(struct symbol *sym, struct perf_evsel *evsel)
{
struct annotation *notes = symbol__annotation(sym);
struct sym_hist *h = annotation__histogram(notes, evsel->idx);
u64 len = symbol__size(sym), offset;
for (offset = 0; offset < len; ++offset)
if (h->addr[offset] != 0)
printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2,
sym->start + offset, h->addr[offset]);
printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->sum", h->sum);
}
int symbol__annotate_printf(struct symbol *sym, struct map *map,
struct perf_evsel *evsel, bool full_paths,
int min_pcnt, int max_lines, int context)
{
struct dso *dso = map->dso;
char *filename;
const char *d_filename;
const char *evsel_name = perf_evsel__name(evsel);
struct annotation *notes = symbol__annotation(sym);
struct disasm_line *pos, *queue = NULL;
u64 start = map__rip_2objdump(map, sym->start);
int printed = 2, queue_len = 0;
int more = 0;
u64 len;
int width = 8;
int namelen, evsel_name_len, graph_dotted_len;
filename = strdup(dso->long_name);
if (!filename)
return -ENOMEM;
if (full_paths)
d_filename = filename;
else
d_filename = basename(filename);
len = symbol__size(sym);
namelen = strlen(d_filename);
evsel_name_len = strlen(evsel_name);
if (perf_evsel__is_group_event(evsel))
width *= evsel->nr_members;
printf(" %-*.*s| Source code & Disassembly of %s for %s\n",
width, width, "Percent", d_filename, evsel_name);
graph_dotted_len = width + namelen + evsel_name_len;
printf("-%-*.*s-----------------------------------------\n",
graph_dotted_len, graph_dotted_len, graph_dotted_line);
if (verbose)
symbol__annotate_hits(sym, evsel);
list_for_each_entry(pos, ¬es->src->source, node) {
if (context && queue == NULL) {
queue = pos;
queue_len = 0;
}
switch (disasm_line__print(pos, sym, start, evsel, len,
min_pcnt, printed, max_lines,
queue)) {
case 0:
++printed;
if (context) {
printed += queue_len;
queue = NULL;
queue_len = 0;
}
break;
case 1:
/* filtered by max_lines */
++more;
break;
case -1:
default:
/*
* Filtered by min_pcnt or non IP lines when
* context != 0
*/
if (!context)
break;
if (queue_len == context)
queue = list_entry(queue->node.next, typeof(*queue), node);
else
++queue_len;
break;
}
}
free(filename);
return more;
}
void symbol__annotate_zero_histogram(struct symbol *sym, int evidx)
{
struct annotation *notes = symbol__annotation(sym);
struct sym_hist *h = annotation__histogram(notes, evidx);
memset(h, 0, notes->src->sizeof_sym_hist);
}
void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
{
struct annotation *notes = symbol__annotation(sym);
struct sym_hist *h = annotation__histogram(notes, evidx);
int len = symbol__size(sym), offset;
h->sum = 0;
for (offset = 0; offset < len; ++offset) {
h->addr[offset] = h->addr[offset] * 7 / 8;
h->sum += h->addr[offset];
}
}
void disasm__purge(struct list_head *head)
{
struct disasm_line *pos, *n;
list_for_each_entry_safe(pos, n, head, node) {
list_del(&pos->node);
disasm_line__free(pos);
}
}
static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp)
{
size_t printed;
if (dl->offset == -1)
return fprintf(fp, "%s\n", dl->line);
printed = fprintf(fp, "%#" PRIx64 " %s", dl->offset, dl->name);
if (dl->ops.raw[0] != '\0') {
printed += fprintf(fp, "%.*s %s\n", 6 - (int)printed, " ",
dl->ops.raw);
}
return printed + fprintf(fp, "\n");
}
size_t disasm__fprintf(struct list_head *head, FILE *fp)
{
struct disasm_line *pos;
size_t printed = 0;
list_for_each_entry(pos, head, node)
printed += disasm_line__fprintf(pos, fp);
return printed;
}
int symbol__tty_annotate(struct symbol *sym, struct map *map,
struct perf_evsel *evsel, bool print_lines,
bool full_paths, int min_pcnt, int max_lines)
{
struct dso *dso = map->dso;
struct rb_root source_line = RB_ROOT;
u64 len;
if (symbol__annotate(sym, map, 0) < 0)
return -1;
len = symbol__size(sym);
if (print_lines) {
srcline_full_filename = full_paths;
symbol__get_source_line(sym, map, evsel, &source_line, len);
print_summary(&source_line, dso->long_name);
}
symbol__annotate_printf(sym, map, evsel, full_paths,
min_pcnt, max_lines, 0);
if (print_lines)
symbol__free_source_line(sym, len);
disasm__purge(&symbol__annotation(sym)->src->source);
return 0;
}
int hist_entry__annotate(struct hist_entry *he, size_t privsize)
{
return symbol__annotate(he->ms.sym, he->ms.map, privsize);
}
bool ui__has_annotation(void)
{
return use_browser == 1 && sort__has_sym;
}