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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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SPDX-License-Identifier: GPL-2.0-only/* * 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. */
#include <errno.h>#include <inttypes.h>#include <stdlib.h>#include "util.h" // hex_width()#include "ui/ui.h"#include "sort.h"#include "build-id.h"#include "color.h"#include "config.h"#include "disasm.h"#include "dso.h"#include "env.h"#include "map.h"#include "maps.h"#include "symbol.h"#include "srcline.h"#include "units.h"#include "debug.h"#include "debuginfo.h"#include "annotate.h"#include "annotate-data.h"#include "evsel.h"#include "evlist.h"#include "bpf-event.h"#include "bpf-utils.h"#include "block-range.h"#include "string2.h"#include "dwarf-regs.h"#include "util/event.h"#include "util/sharded_mutex.h"#include "arch/common.h"#include "namespaces.h"#include "thread.h"#include "hashmap.h"#include "strbuf.h"#include <regex.h>#include <linux/bitops.h>#include <linux/err.h>#include <linux/kernel.h>#include <linux/string.h>#include <linux/zalloc.h>#include <subcmd/parse-options.h>#include <subcmd/run-command.h>#include <math.h>
/* FIXME: For the HE_COLORSET */#include "ui/browser.h"
/* * FIXME: Using the same values as slang.h, * but that header may not be available everywhere */#define LARROW_CHAR ((unsigned char)',')#define RARROW_CHAR ((unsigned char)'+')#define DARROW_CHAR ((unsigned char)'.')#define UARROW_CHAR ((unsigned char)'-')
#include <linux/ctype.h>
/* global annotation options */struct annotation_options annotate_opts;
/* Data type collection debug statistics */struct annotated_data_stat ann_data_stat;LIST_HEAD(ann_insn_stat);
/* Pseudo data types */struct annotated_data_type stackop_type = { .self = { .type_name = (char *)"(stack operation)", .children = LIST_HEAD_INIT(stackop_type.self.children), },};
struct annotated_data_type canary_type = { .self = { .type_name = (char *)"(stack canary)", .children = LIST_HEAD_INIT(canary_type.self.children), },};
#define NO_TYPE ((struct annotated_data_type *)-1UL)
/* symbol histogram: key = offset << 16 | evsel->core.idx */static size_t sym_hist_hash(long key, void *ctx __maybe_unused){ return (key >> 16) + (key & 0xffff);}
static bool sym_hist_equal(long key1, long key2, void *ctx __maybe_unused){ return key1 == key2;}
static struct annotated_source *annotated_source__new(void){ struct annotated_source *src = zalloc(sizeof(*src));
if (src != NULL) INIT_LIST_HEAD(&src->source);
return src;}
static __maybe_unused void annotated_source__delete(struct annotated_source *src){ struct hashmap_entry *cur; size_t bkt;
if (src == NULL) return;
if (src->samples) { hashmap__for_each_entry(src->samples, cur, bkt) zfree(&cur->pvalue); hashmap__free(src->samples); } zfree(&src->histograms); free(src);}
static int annotated_source__alloc_histograms(struct annotated_source *src, int nr_hists){ src->nr_histograms = nr_hists; src->histograms = calloc(nr_hists, sizeof(*src->histograms));
if (src->histograms == NULL) return -1;
src->samples = hashmap__new(sym_hist_hash, sym_hist_equal, NULL); if (IS_ERR(src->samples)) { zfree(&src->histograms); src->samples = NULL; }
return src->histograms ? 0 : -1;}
void symbol__annotate_zero_histograms(struct symbol *sym){ struct annotation *notes = symbol__annotation(sym);
annotation__lock(notes); if (notes->src != NULL) { memset(notes->src->histograms, 0, notes->src->nr_histograms * sizeof(*notes->src->histograms)); hashmap__clear(notes->src->samples); } if (notes->branch && notes->branch->cycles_hist) { memset(notes->branch->cycles_hist, 0, symbol__size(sym) * sizeof(struct cyc_hist)); } annotation__unlock(notes);}
static int __symbol__account_cycles(struct cyc_hist *ch, u64 start, unsigned offset, unsigned cycles, unsigned have_start){ /* * 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 (cycles > ch[offset].cycles_max) ch[offset].cycles_max = cycles;
if (ch[offset].cycles_min) { if (cycles && cycles < ch[offset].cycles_min) ch[offset].cycles_min = cycles; } else ch[offset].cycles_min = 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; }
if (ch[offset].num < NUM_SPARKS) ch[offset].cycles_spark[ch[offset].num] = cycles;
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 map_symbol *ms, struct annotated_source *src, u64 addr, struct perf_sample *sample){ struct evsel *evsel = sample->evsel; struct symbol *sym = ms->sym; long hash_key; u64 offset; struct sym_hist *h; struct sym_hist_entry *entry;
pr_debug3("%s: addr=%#" PRIx64 "\n", __func__, map__unmap_ip(ms->map, addr));
if ((addr < sym->start || addr >= sym->end) && (addr != sym->end || sym->start != 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 = annotated_source__histogram(src, evsel); if (h == NULL) { pr_debug("%s(%d): ENOMEM! sym->name=%s, start=%#" PRIx64 ", addr=%#" PRIx64 ", end=%#" PRIx64 ", func: %d\n", __func__, __LINE__, sym->name, sym->start, addr, sym->end, symbol__type(sym) == STT_FUNC); return -ENOMEM; }
hash_key = offset << 16 | evsel->core.idx; if (!hashmap__find(src->samples, hash_key, &entry)) { entry = zalloc(sizeof(*entry)); if (entry == NULL) return -ENOMEM;
if (hashmap__add(src->samples, hash_key, entry) < 0) return -ENOMEM; }
h->nr_samples++; h->period += sample->period; entry->nr_samples++; entry->period += sample->period;
pr_debug3("%#" PRIx64 " %s: period++ [addr: %#" PRIx64 ", %#" PRIx64 ", evidx=%d] => nr_samples: %" PRIu64 ", period: %" PRIu64 "\n", sym->start, sym->name, addr, addr - sym->start, evsel->core.idx, entry->nr_samples, entry->period); return 0;}
struct annotated_branch *annotation__get_branch(struct annotation *notes){ if (notes == NULL) return NULL;
if (notes->branch == NULL) notes->branch = zalloc(sizeof(*notes->branch));
return notes->branch;}
static struct annotated_branch *symbol__find_branch_hist(struct symbol *sym, unsigned int br_cntr_nr){ struct annotation *notes = symbol__annotation(sym); struct annotated_branch *branch; const size_t size = symbol__size(sym);
branch = annotation__get_branch(notes); if (branch == NULL) return NULL;
if (branch->cycles_hist == NULL) { branch->cycles_hist = calloc(size, sizeof(struct cyc_hist)); if (!branch->cycles_hist) return NULL; }
if (br_cntr_nr && branch->br_cntr == NULL) { branch->br_cntr = calloc(br_cntr_nr * size, sizeof(u64)); if (!branch->br_cntr) return NULL; }
return branch;}
struct annotated_source *symbol__hists(struct symbol *sym, int nr_hists){ struct annotation *notes = symbol__annotation(sym);
if (notes->src == NULL) { notes->src = annotated_source__new(); if (notes->src == NULL) return NULL; goto alloc_histograms; }
if (notes->src->histograms == NULL) {alloc_histograms: annotated_source__alloc_histograms(notes->src, nr_hists); }
return notes->src;}
static int symbol__inc_addr_samples(struct map_symbol *ms, u64 addr, struct perf_sample *sample){ struct symbol *sym = ms->sym; struct annotated_source *src;
if (sym == NULL) return 0; src = symbol__hists(sym, evlist__nr_entries(sample->evsel->evlist)); return src ? __symbol__inc_addr_samples(ms, src, addr, sample) : 0;}
static int symbol__account_br_cntr(struct annotated_branch *branch, struct evsel *evsel, unsigned offset, u64 br_cntr){ unsigned int br_cntr_nr = evsel__leader(evsel)->br_cntr_nr; unsigned int base = evsel__leader(evsel)->br_cntr_idx; unsigned int off = offset * evlist__nr_br_cntr(evsel->evlist); u64 *branch_br_cntr = branch->br_cntr; unsigned int i, mask, width;
if (!br_cntr || !branch_br_cntr) return 0;
perf_env__find_br_cntr_info(evsel__env(evsel), NULL, &width); mask = (1L << width) - 1; for (i = 0; i < br_cntr_nr; i++) { u64 cntr = (br_cntr >> i * width) & mask;
branch_br_cntr[off + i + base] += cntr; if (cntr == mask) branch_br_cntr[off + i + base] |= ANNOTATION__BR_CNTR_SATURATED_FLAG; }
return 0;}
static int symbol__account_cycles(u64 addr, u64 start, struct symbol *sym, unsigned cycles, struct evsel *evsel, u64 br_cntr){ struct annotated_branch *branch; unsigned offset; int ret;
if (sym == NULL) return 0; branch = symbol__find_branch_hist(sym, evlist__nr_br_cntr(evsel->evlist)); if (!branch) 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; ret = __symbol__account_cycles(branch->cycles_hist, start ? start - sym->start : 0, offset, cycles, !!start);
if (ret) return ret;
return symbol__account_br_cntr(branch, evsel, offset, br_cntr);}
int addr_map_symbol__account_cycles(struct addr_map_symbol *ams, struct addr_map_symbol *start, unsigned cycles, struct evsel *evsel, u64 br_cntr){ 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->ms.sym == ams->ms.sym || (ams->ms.sym && start->addr == ams->ms.sym->start + map__start(ams->ms.map)))) 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->ms.sym ? ams->ms.sym->start + map__start(ams->ms.map) : 0, saddr); err = symbol__account_cycles(ams->al_addr, saddr, ams->ms.sym, cycles, evsel, br_cntr); if (err) pr_debug2("account_cycles failed %d\n", err); return err;}
struct annotation_line *annotated_source__get_line(struct annotated_source *src, s64 offset){ struct annotation_line *al;
list_for_each_entry(al, &src->source, node) { if (al->offset == offset) return al; } return NULL;}
static unsigned annotation__count_insn(struct annotation *notes, u64 start, u64 end){ struct annotation_line *al; unsigned n_insn = 0;
al = annotated_source__get_line(notes->src, start); if (al == NULL) return 0;
list_for_each_entry_from(al, ¬es->src->source, node) { if (al->offset == -1) continue; if ((u64)al->offset > end) break; n_insn++; } return n_insn;}
static void annotated_branch__delete(struct annotated_branch *branch){ if (branch) { zfree(&branch->cycles_hist); free(branch->br_cntr); free(branch); }}
static void annotation__count_and_fill(struct annotation *notes, u64 start, u64 end, struct cyc_hist *ch){ unsigned n_insn; unsigned int cover_insn = 0;
n_insn = annotation__count_insn(notes, start, end); if (n_insn && ch->num && ch->cycles) { struct annotation_line *al; struct annotated_branch *branch; float ipc = n_insn / ((double)ch->cycles / (double)ch->num);
/* Hide data when there are too many overlaps. */ if (ch->reset >= 0x7fff) return;
al = annotated_source__get_line(notes->src, start); if (al == NULL) return;
list_for_each_entry_from(al, ¬es->src->source, node) { if (al->offset == -1) continue; if ((u64)al->offset > end) break; if (al->cycles && al->cycles->ipc == 0.0) { al->cycles->ipc = ipc; cover_insn++; } }
branch = annotation__get_branch(notes); if (cover_insn && branch) { branch->hit_cycles += ch->cycles; branch->hit_insn += n_insn * ch->num; branch->cover_insn += cover_insn; } }}
static int annotation__compute_ipc(struct annotation *notes, size_t size, struct evsel *evsel){ unsigned int br_cntr_nr = evlist__nr_br_cntr(evsel->evlist); int err = 0; s64 offset;
if (!notes->branch || !notes->branch->cycles_hist) return 0;
notes->branch->total_insn = annotation__count_insn(notes, 0, size - 1); notes->branch->hit_cycles = 0; notes->branch->hit_insn = 0; notes->branch->cover_insn = 0;
annotation__lock(notes); for (offset = size - 1; offset >= 0; --offset) { struct cyc_hist *ch;
ch = ¬es->branch->cycles_hist[offset]; if (ch && ch->cycles) { struct annotation_line *al;
al = annotated_source__get_line(notes->src, offset); if (al && al->cycles == NULL) { al->cycles = zalloc(sizeof(*al->cycles)); if (al->cycles == NULL) { err = ENOMEM; break; } } if (ch->have_start) annotation__count_and_fill(notes, ch->start, offset, ch); if (al && ch->num_aggr) { al->cycles->avg = ch->cycles_aggr / ch->num_aggr; al->cycles->max = ch->cycles_max; al->cycles->min = ch->cycles_min; } if (al && notes->branch->br_cntr) { if (!al->br_cntr) { al->br_cntr = calloc(br_cntr_nr, sizeof(u64)); if (!al->br_cntr) { err = ENOMEM; break; } } al->num_aggr = ch->num_aggr; al->br_cntr_nr = br_cntr_nr; al->evsel = evsel; memcpy(al->br_cntr, ¬es->branch->br_cntr[offset * br_cntr_nr], br_cntr_nr * sizeof(u64)); } } }
if (err) { while (++offset < (s64)size) { struct cyc_hist *ch = ¬es->branch->cycles_hist[offset];
if (ch && ch->cycles) { struct annotation_line *al;
al = annotated_source__get_line(notes->src, offset); if (al) { zfree(&al->cycles); zfree(&al->br_cntr); } } } }
annotation__unlock(notes); return 0;}
int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, struct perf_sample *sample){ return symbol__inc_addr_samples(&ams->ms, ams->al_addr, sample);}
int hist_entry__inc_addr_samples(struct hist_entry *he, struct perf_sample *sample, u64 ip){ return symbol__inc_addr_samples(&he->ms, ip, sample);}
void annotation__exit(struct annotation *notes){ annotated_source__delete(notes->src); annotated_branch__delete(notes->branch);}
static struct sharded_mutex *sharded_mutex;
static void annotation__init_sharded_mutex(void){ /* As many mutexes as there are CPUs. */ sharded_mutex = sharded_mutex__new(cpu__max_present_cpu().cpu);}
static size_t annotation__hash(const struct annotation *notes){ return (size_t)notes;}
static struct mutex *annotation__get_mutex(const struct annotation *notes){ static pthread_once_t once = PTHREAD_ONCE_INIT;
pthread_once(&once, annotation__init_sharded_mutex); if (!sharded_mutex) return NULL;
return sharded_mutex__get_mutex(sharded_mutex, annotation__hash(notes));}
void annotation__lock(struct annotation *notes) NO_THREAD_SAFETY_ANALYSIS{ struct mutex *mutex = annotation__get_mutex(notes);
if (mutex) mutex_lock(mutex);}
void annotation__unlock(struct annotation *notes) NO_THREAD_SAFETY_ANALYSIS{ struct mutex *mutex = annotation__get_mutex(notes);
if (mutex) mutex_unlock(mutex);}
bool annotation__trylock(struct annotation *notes){ struct mutex *mutex = annotation__get_mutex(notes);
if (!mutex) return false;
return mutex_trylock(mutex);}
void annotation_line__add(struct annotation_line *al, struct list_head *head){ list_add_tail(&al->node, head);}
struct annotation_line *annotation_line__next(struct annotation_line *pos, struct list_head *head){ list_for_each_entry_continue(pos, head, node) if (pos->offset >= 0) return pos;
return NULL;}
static const char *annotate__address_color(struct block_range *br){ double cov = block_range__coverage(br);
if (cov >= 0) { /* mark red for >75% coverage */ if (cov > 0.75) return PERF_COLOR_RED;
/* mark dull for <1% coverage */ if (cov < 0.01) return PERF_COLOR_NORMAL; }
return PERF_COLOR_MAGENTA;}
static const char *annotate__asm_color(struct block_range *br){ double cov = block_range__coverage(br);
if (cov >= 0) { /* mark dull for <1% coverage */ if (cov < 0.01) return PERF_COLOR_NORMAL; }
return PERF_COLOR_BLUE;}
static void annotate__branch_printf(struct block_range *br, u64 addr){ bool emit_comment = true;
if (!br) return;
#if 1 if (br->is_target && br->start == addr) { struct block_range *branch = br; double p;
/* * Find matching branch to our target. */ while (!branch->is_branch) branch = block_range__next(branch);
p = 100 *(double)br->entry / branch->coverage;
if (p > 0.1) { if (emit_comment) { emit_comment = false; printf("\t#"); }
/* * The percentage of coverage joined at this target in relation * to the next branch. */ printf(" +%.2f%%", p); } }#endif if (br->is_branch && br->end == addr) { double p = 100*(double)br->taken / br->coverage;
if (p > 0.1) { if (emit_comment) { emit_comment = false; printf("\t#"); }
/* * The percentage of coverage leaving at this branch, and * its prediction ratio. */ printf(" -%.2f%% (p:%.2f%%)", p, 100*(double)br->pred / br->taken); } }}
static int disasm_line__print(struct disasm_line *dl, u64 start, int addr_fmt_width){ s64 offset = dl->al.offset; const u64 addr = start + offset; struct block_range *br;
br = block_range__find(addr); color_fprintf(stdout, annotate__address_color(br), " %*" PRIx64 ":", addr_fmt_width, addr); color_fprintf(stdout, annotate__asm_color(br), "%s", dl->al.line); annotate__branch_printf(br, addr); return 0;}
static struct annotated_data_type *__hist_entry__get_data_type(struct hist_entry *he, const struct arch *arch, struct debuginfo *dbg, struct disasm_line *dl, int *type_offset);
static bool needs_type_info(struct annotated_data_type *data_type){ if (data_type == NULL || data_type == NO_TYPE) return false;
if (verbose) return true;
return (data_type != &stackop_type) && (data_type != &canary_type);}
static intannotation_line__print(struct annotation_line *al, struct annotation_print_data *apd, struct annotation_options *opts, int printed, struct annotation_line *queue){ struct symbol *sym = apd->he->ms.sym; struct disasm_line *dl = container_of(al, struct disasm_line, al); struct annotation *notes = symbol__annotation(sym); static const char *prev_line; int max_lines = opts->max_lines; int percent_type = opts->percent_type;
if (al->offset != -1) { double max_percent = 0.0; int i, nr_percent = 1; const char *color;
for (i = 0; i < al->data_nr; i++) { double percent;
percent = annotation_data__percent(&al->data[i], percent_type);
if (percent > max_percent) max_percent = percent; }
if (al->data_nr > nr_percent) nr_percent = al->data_nr;
if (max_percent < opts->min_pcnt) return -1;
if (max_lines && printed >= max_lines) return 1;
if (queue != NULL) { struct annotation_options queue_opts = { .max_lines = 1, .percent_type = percent_type, };
list_for_each_entry_from(queue, ¬es->src->source, node) { if (queue == al) break; annotation_line__print(queue, apd, &queue_opts, /*printed=*/0, /*queue=*/NULL); } }
color = get_percent_color(max_percent);
for (i = 0; i < nr_percent; i++) { struct annotation_data *data = &al->data[i]; double percent;
percent = annotation_data__percent(data, percent_type); color = get_percent_color(percent);
if (symbol_conf.show_total_period) color_fprintf(stdout, color, " %11" PRIu64, data->he.period); else if (symbol_conf.show_nr_samples) color_fprintf(stdout, color, " %7" PRIu64, data->he.nr_samples); else color_fprintf(stdout, color, " %7.2f", percent); }
printf(" : ");
disasm_line__print(dl, notes->src->start, apd->addr_fmt_width);
if (opts->code_with_type && apd->dbg) { struct annotated_data_type *data_type; int offset = 0;
data_type = __hist_entry__get_data_type(apd->he, apd->arch, apd->dbg, dl, &offset); if (needs_type_info(data_type)) { char buf[4096];
printf("\t\t# data-type: %s", data_type->self.type_name);
if (data_type != &stackop_type && data_type != &canary_type) printf(" +%#x", offset);
if (annotated_data_type__get_member_name(data_type, buf, sizeof(buf), offset)) printf(" (%s)", buf); } }
/* * 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 (al->path) { if (!prev_line || strcmp(prev_line, al->path)) { color_fprintf(stdout, color, " // %s", al->path); prev_line = al->path; } }
printf("\n"); } else if (max_lines && printed >= max_lines) return 1; else { int width = annotation__pcnt_width(notes);
if (queue) return -1;
if (!*al->line) printf(" %*s:\n", width, " "); else printf(" %*s: %-*d %s\n", width, " ", apd->addr_fmt_width, al->line_nr, al->line); }
return 0;}
static void calc_percent(struct annotation *notes, struct evsel *evsel, struct annotation_data *data, s64 offset, s64 end){ struct hists *hists = evsel__hists(evsel); struct sym_hist *sym_hist = annotation__histogram(notes, evsel); unsigned int hits = 0; u64 period = 0;
while (offset < end) { struct sym_hist_entry *entry;
entry = annotated_source__hist_entry(notes->src, evsel, offset); if (entry) { hits += entry->nr_samples; period += entry->period; } ++offset; }
if (sym_hist->nr_samples) { data->he.period = period; data->he.nr_samples = hits; data->percent[PERCENT_HITS_LOCAL] = 100.0 * hits / sym_hist->nr_samples; }
if (hists->stats.nr_non_filtered_samples) data->percent[PERCENT_HITS_GLOBAL] = 100.0 * hits / hists->stats.nr_non_filtered_samples;
if (sym_hist->period) data->percent[PERCENT_PERIOD_LOCAL] = 100.0 * period / sym_hist->period;
if (hists->stats.total_period) data->percent[PERCENT_PERIOD_GLOBAL] = 100.0 * period / hists->stats.total_period;}
static void annotation__calc_percent(struct annotation *notes, struct evsel *leader, s64 len){ struct annotation_line *al, *next; struct evsel *evsel;
list_for_each_entry(al, ¬es->src->source, node) { s64 end; int i = 0;
if (al->offset == -1) continue;
next = annotation_line__next(al, ¬es->src->source); end = next ? next->offset : len;
for_each_group_evsel(evsel, leader) { struct annotation_data *data;
BUG_ON(i >= al->data_nr);
if (symbol_conf.skip_empty && evsel__hists(evsel)->stats.nr_samples == 0) continue;
data = &al->data[i++];
calc_percent(notes, evsel, data, al->offset, end); } }}
void symbol__calc_percent(struct symbol *sym, struct evsel *evsel){ struct annotation *notes = symbol__annotation(sym);
annotation__calc_percent(notes, evsel, symbol__size(sym));}
int map_symbol__get_arch(struct map_symbol *ms, const struct arch **parch){ const struct arch *arch; struct machine *machine = NULL; struct map *map = ms->map; struct dso *dso = map ? map__dso(map) : NULL; uint32_t e_flags = 0; uint16_t e_machine = EM_NONE;
const char *cpuid = NULL;
if (ms->thread) { machine = maps__machine(thread__maps(ms->thread)); e_machine = thread__e_machine(ms->thread, machine, &e_flags); if (machine && machine->env) cpuid = machine->env->cpuid; } else if (dso) { struct maps *kmaps = (map && dso__kernel(dso)) ? map__kmaps(map) : NULL; struct machine *kmap_machine = kmaps ? maps__machine(kmaps) : NULL;
e_machine = dso__e_machine(dso, kmap_machine, &e_flags); if (kmap_machine && kmap_machine->env) cpuid = kmap_machine->env->cpuid; }
if (e_machine == EM_NONE) e_machine = thread__e_machine(NULL, NULL, &e_flags);
arch = arch__find(e_machine, e_flags, cpuid); if (arch == NULL) { pr_err("%s: unsupported arch %d\n", __func__, e_machine); /* TODO: Refactor annotate/disassemble subsystem error * codes to uniformly return negative integers. */ return errno ? errno : ENOTSUP; } if (parch) *parch = arch;
return 0;}
int symbol__annotate(struct map_symbol *ms, struct evsel *evsel, const struct arch **parch){ struct symbol *sym = ms->sym; struct annotation *notes = symbol__annotation(sym); struct annotate_args args = { .options = &annotate_opts, }; const struct arch *arch = NULL; int err, nr;
err = map_symbol__get_arch(ms, &arch); if (err) return err;
if (parch) *parch = arch;
if (notes->src && !list_empty(¬es->src->source)) return 0;
args.arch = arch; args.ms = ms;
if (notes->src == NULL) { notes->src = annotated_source__new(); if (notes->src == NULL) return -1; }
nr = 0; if (evsel__is_group_event(evsel)) { struct evsel *pos;
for_each_group_evsel(pos, evsel) { if (symbol_conf.skip_empty && evsel__hists(pos)->stats.nr_samples == 0) continue; nr++; } } notes->src->nr_events = nr ? nr : 1;
if (annotate_opts.full_addr) notes->src->start = map__objdump_2mem(ms->map, ms->sym->start); else notes->src->start = map__rip_2objdump(ms->map, ms->sym->start);
return symbol__disassemble(sym, &args);}
static void insert_source_line(struct rb_root *root, struct annotation_line *al){ struct annotation_line *iter; struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; unsigned int percent_type = annotate_opts.percent_type; int i, ret;
while (*p != NULL) { parent = *p; iter = rb_entry(parent, struct annotation_line, rb_node);
ret = strcmp(iter->path, al->path); if (ret == 0) { for (i = 0; i < al->data_nr; i++) { iter->data[i].percent_sum += annotation_data__percent(&al->data[i], percent_type); } return; }
if (ret < 0) p = &(*p)->rb_left; else p = &(*p)->rb_right; }
for (i = 0; i < al->data_nr; i++) { al->data[i].percent_sum = annotation_data__percent(&al->data[i], percent_type); }
rb_link_node(&al->rb_node, parent, p); rb_insert_color(&al->rb_node, root);}
static int cmp_source_line(struct annotation_line *a, struct annotation_line *b){ int i;
for (i = 0; i < a->data_nr; i++) { if (a->data[i].percent_sum == b->data[i].percent_sum) continue; return a->data[i].percent_sum > b->data[i].percent_sum; }
return 0;}
static void __resort_source_line(struct rb_root *root, struct annotation_line *al){ struct annotation_line *iter; struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL;
while (*p != NULL) { parent = *p; iter = rb_entry(parent, struct annotation_line, rb_node);
if (cmp_source_line(al, iter)) p = &(*p)->rb_left; else p = &(*p)->rb_right; }
rb_link_node(&al->rb_node, parent, p); rb_insert_color(&al->rb_node, root);}
static void resort_source_line(struct rb_root *dest_root, struct rb_root *src_root){ struct annotation_line *al; struct rb_node *node;
node = rb_first(src_root); while (node) { struct rb_node *next;
al = rb_entry(node, struct annotation_line, rb_node); next = rb_next(node); rb_erase(node, src_root);
__resort_source_line(dest_root, al); node = next; }}
static void print_summary(struct rb_root *root, const char *filename){ struct annotation_line *al; 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;
al = rb_entry(node, struct annotation_line, rb_node); for (i = 0; i < al->data_nr; i++) { percent = al->data[i].percent_sum; color = get_percent_color(percent); color_fprintf(stdout, color, " %7.2f", percent);
if (percent > percent_max) percent_max = percent; }
path = al->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 evsel *evsel){ struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evsel); u64 len = symbol__size(sym), offset;
for (offset = 0; offset < len; ++offset) { struct sym_hist_entry *entry;
entry = annotated_source__hist_entry(notes->src, evsel, offset); if (entry && entry->nr_samples != 0) printf("%*" PRIx64 ": %" PRIu64 "\n", BITS_PER_LONG / 2, sym->start + offset, entry->nr_samples); } printf("%*s: %" PRIu64 "\n", BITS_PER_LONG / 2, "h->nr_samples", h->nr_samples);}
static int annotated_source__addr_fmt_width(struct list_head *lines, u64 start){ char bf[32]; struct annotation_line *line;
list_for_each_entry_reverse(line, lines, node) { if (line->offset != -1) return scnprintf(bf, sizeof(bf), "%" PRIx64, start + line->offset); }
return 0;}
int hist_entry__annotate_printf(struct hist_entry *he, struct evsel *evsel){ struct map_symbol *ms = &he->ms; struct map *map = ms->map; struct symbol *sym = ms->sym; struct dso *dso = map__dso(map); char *filename; const char *d_filename; const char *evsel_name = evsel__name(evsel); struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evsel); struct annotation_line *pos, *queue = NULL; struct annotation_options *opts = &annotate_opts; struct annotation_print_data apd = { .he = he, .evsel = evsel, }; int printed = 2, queue_len = 0; int more = 0; bool context = opts->context; int width = annotation__pcnt_width(notes); int graph_dotted_len; char buf[512];
filename = strdup(dso__long_name(dso)); if (!filename) return -ENOMEM;
if (opts->full_path) d_filename = filename; else d_filename = perf_basename(filename);
if (evsel__is_group_event(evsel)) { evsel__group_desc(evsel, buf, sizeof(buf)); evsel_name = buf; }
if (map_symbol__get_arch(ms, &apd.arch)) { free(filename); return ENOTSUP; }
graph_dotted_len = printf(" %-*.*s| Source code & Disassembly of %s for %s (%" PRIu64 " samples, " "percent: %s)\n", width, width, symbol_conf.show_total_period ? "Period" : symbol_conf.show_nr_samples ? "Samples" : "Percent", d_filename, evsel_name, h->nr_samples, percent_type_str(opts->percent_type));
printf("%-*.*s----\n", graph_dotted_len, graph_dotted_len, graph_dotted_line);
if (verbose > 0) symbol__annotate_hits(sym, evsel);
apd.addr_fmt_width = annotated_source__addr_fmt_width(¬es->src->source, notes->src->start); apd.dbg = dso__debuginfo(dso);
list_for_each_entry(pos, ¬es->src->source, node) { int err;
if (context && queue == NULL) { queue = pos; queue_len = 0; }
err = annotation_line__print(pos, &apd, opts, printed, queue);
switch (err) { 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; } }
debuginfo__delete(apd.dbg); free(filename);
return more;}
static void FILE__set_percent_color(void *fp __maybe_unused, double percent __maybe_unused, bool current __maybe_unused){}
static int FILE__set_jumps_percent_color(void *fp __maybe_unused, int nr __maybe_unused, bool current __maybe_unused){ return 0;}
static int FILE__set_color(void *fp __maybe_unused, int color __maybe_unused){ return 0;}
static void FILE__printf(void *fp, const char *fmt, ...){ va_list args;
va_start(args, fmt); vfprintf(fp, fmt, args); va_end(args);}
static void FILE__write_graph(void *fp, int graph){ const char *s; switch (graph) {
case DARROW_CHAR: s = "↓"; break; case UARROW_CHAR: s = "↑"; break; case LARROW_CHAR: s = "←"; break; case RARROW_CHAR: s = "→"; break; default: s = "?"; break; }
fputs(s, fp);}
static int symbol__annotate_fprintf2(struct symbol *sym, FILE *fp, struct annotation_print_data *apd){ struct annotation *notes = symbol__annotation(sym); struct annotation_write_ops wops = { .first_line = true, .obj = fp, .set_color = FILE__set_color, .set_percent_color = FILE__set_percent_color, .set_jumps_percent_color = FILE__set_jumps_percent_color, .printf = FILE__printf, .write_graph = FILE__write_graph, }; struct annotation_line *al;
if (annotate_opts.code_with_type) { map_symbol__get_arch(&apd->he->ms, &apd->arch); apd->dbg = dso__debuginfo(map__dso(apd->he->ms.map)); }
list_for_each_entry(al, ¬es->src->source, node) { if (annotation_line__filter(al)) continue; annotation_line__write(al, notes, &wops, apd); fputc('\n', fp); wops.first_line = false; }
if (annotate_opts.code_with_type) debuginfo__delete(apd->dbg);
return 0;}
int map_symbol__annotation_dump(struct map_symbol *ms, struct evsel *evsel, struct hist_entry *he){ const char *ev_name = evsel__name(evsel); char buf[1024]; char *filename; int err = -1; FILE *fp; struct annotation_print_data apd = { .he = he, .evsel = evsel, };
if (asprintf(&filename, "%s.annotation", ms->sym->name) < 0) return -1;
fp = fopen(filename, "w"); if (fp == NULL) goto out_free_filename;
if (evsel__is_group_event(evsel)) { evsel__group_desc(evsel, buf, sizeof(buf)); ev_name = buf; }
fprintf(fp, "%s() %s\nEvent: %s\n\n", ms->sym->name, dso__long_name(map__dso(ms->map)), ev_name); symbol__annotate_fprintf2(ms->sym, fp, &apd);
fclose(fp); err = 0;out_free_filename: free(filename); return err;}
void symbol__annotate_zero_histogram(struct symbol *sym, struct evsel *evsel){ struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evsel);
memset(h, 0, sizeof(*notes->src->histograms) * notes->src->nr_histograms);}
void symbol__annotate_decay_histogram(struct symbol *sym, struct evsel *evsel){ struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evsel); struct annotation_line *al;
h->nr_samples = 0; list_for_each_entry(al, ¬es->src->source, node) { struct sym_hist_entry *entry;
if (al->offset == -1) continue;
entry = annotated_source__hist_entry(notes->src, evsel, al->offset); if (entry == NULL) continue;
entry->nr_samples = entry->nr_samples * 7 / 8; h->nr_samples += entry->nr_samples; }}
void annotated_source__purge(struct annotated_source *as){ struct annotation_line *al, *n;
list_for_each_entry_safe(al, n, &as->source, node) { list_del_init(&al->node); disasm_line__free(disasm_line(al)); } as->tried_source = false;}
static size_t disasm_line__fprintf(struct disasm_line *dl, FILE *fp){ size_t printed;
if (dl->al.offset == -1) return fprintf(fp, "%s\n", dl->al.line);
printed = fprintf(fp, "%#" PRIx64 " %s", dl->al.offset, dl->ins.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, al.node) printed += disasm_line__fprintf(pos, fp);
return printed;}
bool disasm_line__is_valid_local_jump(struct disasm_line *dl, struct symbol *sym){ if (!dl || !dl->ins.ops || !ins__is_jump(&dl->ins) || !disasm_line__has_local_offset(dl) || dl->ops.target.offset < 0 || dl->ops.target.offset >= (s64)symbol__size(sym)) return false;
return true;}
static voidannotation__mark_jump_targets(struct annotation *notes, struct symbol *sym){ struct annotation_line *al;
/* PLT symbols contain external offsets */ if (strstr(sym->name, "@plt")) return;
list_for_each_entry(al, ¬es->src->source, node) { struct disasm_line *dl; struct annotation_line *target;
dl = disasm_line(al);
if (!disasm_line__is_valid_local_jump(dl, sym)) continue;
target = annotated_source__get_line(notes->src, dl->ops.target.offset); /* * FIXME: Oops, no jump target? Buggy disassembler? Or do we * have to adjust to the previous offset? */ if (target == NULL) continue;
if (++target->jump_sources > notes->src->max_jump_sources) notes->src->max_jump_sources = target->jump_sources; }}
static void annotation__set_index(struct annotation *notes){ struct annotation_line *al; struct annotated_source *src = notes->src;
src->widths.max_line_len = 0; src->nr_entries = 0; src->nr_asm_entries = 0;
list_for_each_entry(al, &src->source, node) { size_t line_len = strlen(al->line);
if (src->widths.max_line_len < line_len) src->widths.max_line_len = line_len; al->idx = src->nr_entries++; if (al->offset != -1) al->idx_asm = src->nr_asm_entries++; else al->idx_asm = -1; }}
static inline int width_jumps(int n){ if (n >= 100) return 5; if (n / 10) return 2; return 1;}
static int annotation__max_ins_name(struct annotation *notes){ int max_name = 0, len; struct annotation_line *al;
list_for_each_entry(al, ¬es->src->source, node) { if (al->offset == -1) continue;
len = strlen(disasm_line(al)->ins.name); if (max_name < len) max_name = len; }
return max_name;}
static voidannotation__init_column_widths(struct annotation *notes, struct symbol *sym){ notes->src->widths.addr = notes->src->widths.target = notes->src->widths.min_addr = hex_width(symbol__size(sym)); notes->src->widths.max_addr = hex_width(sym->end); notes->src->widths.jumps = width_jumps(notes->src->max_jump_sources); notes->src->widths.max_ins_name = annotation__max_ins_name(notes);}
void annotation__update_column_widths(struct annotation *notes){ if (annotate_opts.use_offset) notes->src->widths.target = notes->src->widths.min_addr; else if (annotate_opts.full_addr) notes->src->widths.target = BITS_PER_LONG / 4; else notes->src->widths.target = notes->src->widths.max_addr;
notes->src->widths.addr = notes->src->widths.target;
if (annotate_opts.show_nr_jumps) notes->src->widths.addr += notes->src->widths.jumps + 1;}
void annotation__toggle_full_addr(struct annotation *notes, struct map_symbol *ms){ annotate_opts.full_addr = !annotate_opts.full_addr;
if (annotate_opts.full_addr) notes->src->start = map__objdump_2mem(ms->map, ms->sym->start); else notes->src->start = map__rip_2objdump(ms->map, ms->sym->start);
annotation__update_column_widths(notes);}
static void annotation__calc_lines(struct annotation *notes, struct map_symbol *ms, struct rb_root *root){ struct annotation_line *al; struct rb_root tmp_root = RB_ROOT;
list_for_each_entry(al, ¬es->src->source, node) { double percent_max = 0.0; u64 addr; int i;
for (i = 0; i < al->data_nr; i++) { double percent;
percent = annotation_data__percent(&al->data[i], annotate_opts.percent_type);
if (percent > percent_max) percent_max = percent; }
if (percent_max <= 0.5) continue;
addr = map__rip_2objdump(ms->map, ms->sym->start); al->path = get_srcline(map__dso(ms->map), addr + al->offset, NULL, false, true, ms->sym->start + al->offset); insert_source_line(&tmp_root, al); }
resort_source_line(root, &tmp_root);}
static void symbol__calc_lines(struct map_symbol *ms, struct rb_root *root){ struct annotation *notes = symbol__annotation(ms->sym);
annotation__calc_lines(notes, ms, root);}
int hist_entry__tty_annotate2(struct hist_entry *he, struct evsel *evsel){ struct map_symbol *ms = &he->ms; struct dso *dso = map__dso(ms->map); struct symbol *sym = ms->sym; struct rb_root source_line = RB_ROOT; struct hists *hists = evsel__hists(evsel); struct annotation_print_data apd = { .he = he, .evsel = evsel, }; char buf[1024]; int err;
err = symbol__annotate2(ms, evsel, NULL); if (err) { char msg[BUFSIZ];
dso__set_annotate_warned(dso); symbol__strerror_disassemble(ms, err, msg, sizeof(msg)); ui__error("Couldn't annotate %s:\n%s", sym->name, msg); return -1; }
if (annotate_opts.print_lines) { srcline_full_filename = annotate_opts.full_path; symbol__calc_lines(ms, &source_line); print_summary(&source_line, dso__long_name(dso)); }
hists__scnprintf_title(hists, buf, sizeof(buf)); fprintf(stdout, "%s, [percent: %s]\n%s() %s\n", buf, percent_type_str(annotate_opts.percent_type), sym->name, dso__long_name(dso)); symbol__annotate_fprintf2(sym, stdout, &apd);
annotated_source__purge(symbol__annotation(sym)->src);
return 0;}
int hist_entry__tty_annotate(struct hist_entry *he, struct evsel *evsel){ struct map_symbol *ms = &he->ms; struct dso *dso = map__dso(ms->map); struct symbol *sym = ms->sym; struct rb_root source_line = RB_ROOT; int err;
err = symbol__annotate(ms, evsel, NULL); if (err) { char msg[BUFSIZ];
dso__set_annotate_warned(dso); symbol__strerror_disassemble(ms, err, msg, sizeof(msg)); ui__error("Couldn't annotate %s:\n%s", sym->name, msg); return -1; }
symbol__calc_percent(sym, evsel);
if (annotate_opts.print_lines) { srcline_full_filename = annotate_opts.full_path; symbol__calc_lines(ms, &source_line); print_summary(&source_line, dso__long_name(dso)); }
hist_entry__annotate_printf(he, evsel);
annotated_source__purge(symbol__annotation(sym)->src);
return 0;}
bool ui__has_annotation(void){ return use_browser == 1 && perf_hpp_list.sym;}
static double annotation_line__max_percent(struct annotation_line *al, unsigned int percent_type){ double percent_max = 0.0; int i;
for (i = 0; i < al->data_nr; i++) { double percent;
percent = annotation_data__percent(&al->data[i], percent_type);
if (percent > percent_max) percent_max = percent; }
return percent_max;}
static int disasm_line__write(struct disasm_line *dl, struct annotation *notes, void *obj, char *bf, size_t size, void (*obj__printf)(void *obj, const char *fmt, ...), void (*obj__write_graph)(void *obj, int graph)){ if (dl->ins.ops && dl->ins.ops->scnprintf) { if (ins__is_jump(&dl->ins)) { bool fwd;
if (dl->ops.target.outside) goto call_like; fwd = dl->ops.target.offset > dl->al.offset; obj__write_graph(obj, fwd ? DARROW_CHAR : UARROW_CHAR); obj__printf(obj, " "); } else if (ins__is_call(&dl->ins)) {call_like: obj__write_graph(obj, RARROW_CHAR); obj__printf(obj, " "); } else if (ins__is_ret(&dl->ins)) { obj__write_graph(obj, LARROW_CHAR); obj__printf(obj, " "); } else { obj__printf(obj, " "); } } else { obj__printf(obj, " "); }
return disasm_line__scnprintf(dl, bf, size, !annotate_opts.use_offset, notes->src->widths.max_ins_name) + 2;}
static void ipc_coverage_string(char *bf, int size, struct annotation *notes){ double ipc = 0.0, coverage = 0.0; struct annotated_branch *branch = annotation__get_branch(notes);
if (branch && branch->hit_cycles) ipc = branch->hit_insn / ((double)branch->hit_cycles);
if (branch && branch->total_insn) { coverage = branch->cover_insn * 100.0 / ((double)branch->total_insn); }
scnprintf(bf, size, "(Average IPC: %.2f, IPC Coverage: %.1f%%)", ipc, coverage);}
int annotation_br_cntr_abbr_list(char **str, struct evsel *evsel, bool header){ struct evsel *pos; struct strbuf sb;
if (evlist__nr_br_cntr(evsel->evlist) <= 0) return -ENOTSUP;
strbuf_init(&sb, /*hint=*/ 0);
if (header && strbuf_addf(&sb, "# Branch counter abbr list:\n")) goto err;
evlist__for_each_entry(evsel->evlist, pos) { if (!(pos->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS)) continue; if (header && strbuf_addf(&sb, "#")) goto err;
if (strbuf_addf(&sb, " %s = %s\n", pos->name, pos->abbr_name)) goto err; }
if (header && strbuf_addf(&sb, "#")) goto err; if (strbuf_addf(&sb, " '-' No event occurs\n")) goto err;
if (header && strbuf_addf(&sb, "#")) goto err; if (strbuf_addf(&sb, " '+' Event occurrences may be lost due to branch counter saturated\n")) goto err;
*str = strbuf_detach(&sb, NULL);
return 0;err: strbuf_release(&sb); return -ENOMEM;}
/* Assume the branch counter saturated at 3 */#define ANNOTATION_BR_CNTR_SATURATION 3
int annotation_br_cntr_entry(char **str, int br_cntr_nr, u64 *br_cntr, int num_aggr, struct evsel *evsel){ struct evsel *pos = evsel ? evlist__first(evsel->evlist) : NULL; bool saturated = false; int i, j, avg, used; struct strbuf sb;
strbuf_init(&sb, /*hint=*/ 0); for (i = 0; i < br_cntr_nr; i++) { used = 0; avg = ceil((double)(br_cntr[i] & ~ANNOTATION__BR_CNTR_SATURATED_FLAG) / (double)num_aggr);
/* * A histogram with the abbr name is displayed by default. * With -v, the exact number of branch counter is displayed. */ if (verbose) { evlist__for_each_entry_from(evsel->evlist, pos) { if ((pos->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS) && (pos->br_cntr_idx == i)) break; } if (strbuf_addstr(&sb, pos->abbr_name)) goto err;
if (!br_cntr[i]) { if (strbuf_addstr(&sb, "=-")) goto err; } else { if (strbuf_addf(&sb, "=%d", avg)) goto err; } if (br_cntr[i] & ANNOTATION__BR_CNTR_SATURATED_FLAG) { if (strbuf_addch(&sb, '+')) goto err; } else { if (strbuf_addch(&sb, ' ')) goto err; }
if ((i < br_cntr_nr - 1) && strbuf_addch(&sb, ',')) goto err; continue; }
if (strbuf_addch(&sb, '|')) goto err;
if (!br_cntr[i]) { if (strbuf_addch(&sb, '-')) goto err; used++; } else { evlist__for_each_entry_from(evsel->evlist, pos) { if ((pos->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS) && (pos->br_cntr_idx == i)) break; } if (br_cntr[i] & ANNOTATION__BR_CNTR_SATURATED_FLAG) saturated = true;
for (j = 0; j < avg; j++, used++) { /* Print + if the number of logged events > 3 */ if (j >= ANNOTATION_BR_CNTR_SATURATION) { saturated = true; break; } if (strbuf_addstr(&sb, pos->abbr_name)) goto err; }
if (saturated) { if (strbuf_addch(&sb, '+')) goto err; used++; } pos = list_next_entry(pos, core.node); }
for (j = used; j < ANNOTATION_BR_CNTR_SATURATION + 1; j++) { if (strbuf_addch(&sb, ' ')) goto err; } }
if (!verbose && strbuf_addch(&sb, br_cntr_nr ? '|' : ' ')) goto err;
*str = strbuf_detach(&sb, NULL);
return 0;err: strbuf_release(&sb); return -ENOMEM;}
struct type_hash_entry { struct annotated_data_type *type; int offset;};
static int disasm_line__snprint_type_info(struct disasm_line *dl, char *buf, int len, struct annotation_print_data *apd){ struct annotated_data_type *data_type = NULL; struct type_hash_entry *entry = NULL; char member[256]; int offset = 0; int printed;
scnprintf(buf, len, " ");
if (!annotate_opts.code_with_type || apd->dbg == NULL) return 1;
if (apd->type_hash) { hashmap__find(apd->type_hash, dl->al.offset, &entry); if (entry != NULL) { data_type = entry->type; offset = entry->offset; } }
if (data_type == NULL) data_type = __hist_entry__get_data_type(apd->he, apd->arch, apd->dbg, dl, &offset);
if (apd->type_hash && entry == NULL) { entry = malloc(sizeof(*entry)); if (entry != NULL) { entry->type = data_type; entry->offset = offset; hashmap__add(apd->type_hash, dl->al.offset, entry); } }
if (!needs_type_info(data_type)) return 1;
printed = scnprintf(buf, len, "\t\t# data-type: %s", data_type->self.type_name);
if (data_type != &stackop_type && data_type != &canary_type && len > printed) printed += scnprintf(buf + printed, len - printed, " +%#x", offset);
if (annotated_data_type__get_member_name(data_type, member, sizeof(member), offset) && len > printed) { printed += scnprintf(buf + printed, len - printed, " (%s)", member); } return printed;}
void annotation_line__write(struct annotation_line *al, struct annotation *notes, const struct annotation_write_ops *wops, struct annotation_print_data *apd){ bool current_entry = wops->current_entry; bool change_color = wops->change_color; double percent_max = annotation_line__max_percent(al, annotate_opts.percent_type); int width = wops->width; int pcnt_width = annotation__pcnt_width(notes); int cycles_width = annotation__cycles_width(notes); bool show_title = false; char bf[256]; int printed; void *obj = wops->obj; int (*obj__set_color)(void *obj, int color) = wops->set_color; void (*obj__set_percent_color)(void *obj, double percent, bool current) = wops->set_percent_color; int (*obj__set_jumps_percent_color)(void *obj, int nr, bool current) = wops->set_jumps_percent_color; void (*obj__printf)(void *obj, const char *fmt, ...) = wops->printf; void (*obj__write_graph)(void *obj, int graph) = wops->write_graph;
if (wops->first_line && (al->offset == -1 || percent_max == 0.0)) { if (notes->branch && al->cycles) { if (al->cycles->ipc == 0.0 && al->cycles->avg == 0) show_title = true; } else show_title = true; }
if (al->offset != -1 && percent_max != 0.0) { int i;
for (i = 0; i < al->data_nr; i++) { double percent;
percent = annotation_data__percent(&al->data[i], annotate_opts.percent_type);
obj__set_percent_color(obj, percent, current_entry); if (symbol_conf.show_total_period) { obj__printf(obj, "%11" PRIu64 " ", al->data[i].he.period); } else if (symbol_conf.show_nr_samples) { obj__printf(obj, "%7" PRIu64 " ", al->data[i].he.nr_samples); } else { obj__printf(obj, "%7.2f ", percent); } } } else { obj__set_percent_color(obj, 0, current_entry);
if (!show_title) obj__printf(obj, "%-*s", pcnt_width, " "); else { obj__printf(obj, "%-*s", pcnt_width, symbol_conf.show_total_period ? "Period" : symbol_conf.show_nr_samples ? "Samples" : "Percent"); } } width -= pcnt_width;
if (notes->branch) { if (al->cycles && al->cycles->ipc) obj__printf(obj, "%*.2f ", ANNOTATION__IPC_WIDTH - 1, al->cycles->ipc); else if (!show_title) obj__printf(obj, "%*s", ANNOTATION__IPC_WIDTH, " "); else obj__printf(obj, "%*s ", ANNOTATION__IPC_WIDTH - 1, "IPC");
if (!annotate_opts.show_minmax_cycle) { if (al->cycles && al->cycles->avg) obj__printf(obj, "%*" PRIu64 " ", ANNOTATION__CYCLES_WIDTH - 1, al->cycles->avg); else if (!show_title) obj__printf(obj, "%*s", ANNOTATION__CYCLES_WIDTH, " "); else obj__printf(obj, "%*s ", ANNOTATION__CYCLES_WIDTH - 1, "Cycle"); } else { if (al->cycles) { char str[32];
scnprintf(str, sizeof(str), "%" PRIu64 "(%" PRIu64 "/%" PRIu64 ")", al->cycles->avg, al->cycles->min, al->cycles->max);
obj__printf(obj, "%*s ", ANNOTATION__MINMAX_CYCLES_WIDTH - 1, str); } else if (!show_title) obj__printf(obj, "%*s", ANNOTATION__MINMAX_CYCLES_WIDTH, " "); else obj__printf(obj, "%*s ", ANNOTATION__MINMAX_CYCLES_WIDTH - 1, "Cycle(min/max)"); }
if (annotate_opts.show_br_cntr) { if (show_title) { obj__printf(obj, "%*s ", ANNOTATION__BR_CNTR_WIDTH, "Branch Counter"); } else { char *buf;
if (!annotation_br_cntr_entry(&buf, al->br_cntr_nr, al->br_cntr, al->num_aggr, al->evsel)) { obj__printf(obj, "%*s ", ANNOTATION__BR_CNTR_WIDTH, buf); free(buf); } } }
if (show_title && !*al->line) { ipc_coverage_string(bf, sizeof(bf), notes); obj__printf(obj, "%*s", ANNOTATION__AVG_IPC_WIDTH, bf); } } width -= cycles_width;
obj__printf(obj, " "); width -= 1;
if (!*al->line) obj__printf(obj, "%-*s", width, " "); else if (al->offset == -1) { if (al->line_nr && annotate_opts.show_linenr) printed = scnprintf(bf, sizeof(bf), "%-*d ", notes->src->widths.addr + 1, al->line_nr); else printed = scnprintf(bf, sizeof(bf), "%-*s ", notes->src->widths.addr, " "); obj__printf(obj, bf); width -= printed; obj__printf(obj, "%-*s", width, al->line); } else { u64 addr = al->offset; int color = -1;
if (!annotate_opts.use_offset) addr += notes->src->start;
if (!annotate_opts.use_offset) { printed = scnprintf(bf, sizeof(bf), "%" PRIx64 ": ", addr); } else { if (al->jump_sources && annotate_opts.offset_level >= ANNOTATION__OFFSET_JUMP_TARGETS) { if (annotate_opts.show_nr_jumps) { int prev; printed = scnprintf(bf, sizeof(bf), "%*d ", notes->src->widths.jumps, al->jump_sources); prev = obj__set_jumps_percent_color(obj, al->jump_sources, current_entry); obj__printf(obj, bf); obj__set_color(obj, prev); }print_addr: printed = scnprintf(bf, sizeof(bf), "%*" PRIx64 ": ", notes->src->widths.target, addr); } else if (ins__is_call(&disasm_line(al)->ins) && annotate_opts.offset_level >= ANNOTATION__OFFSET_CALL) { goto print_addr; } else if (annotate_opts.offset_level == ANNOTATION__MAX_OFFSET_LEVEL) { goto print_addr; } else { printed = scnprintf(bf, sizeof(bf), "%-*s ", notes->src->widths.addr, " "); } }
if (change_color) color = obj__set_color(obj, HE_COLORSET_ADDR); obj__printf(obj, bf); if (change_color) obj__set_color(obj, color);
width -= printed;
printed = disasm_line__write(disasm_line(al), notes, obj, bf, sizeof(bf), obj__printf, obj__write_graph);
obj__printf(obj, "%s", bf); width -= printed;
disasm_line__snprint_type_info(disasm_line(al), bf, sizeof(bf), apd); obj__printf(obj, "%-*s", width, bf); }
}
int symbol__annotate2(struct map_symbol *ms, struct evsel *evsel, const struct arch **parch){ struct symbol *sym = ms->sym; struct annotation *notes = symbol__annotation(sym); size_t size = symbol__size(sym); int err;
err = symbol__annotate(ms, evsel, parch); if (err) return err;
symbol__calc_percent(sym, evsel);
annotation__set_index(notes); annotation__mark_jump_targets(notes, sym);
err = annotation__compute_ipc(notes, size, evsel); if (err) return err;
annotation__init_column_widths(notes, sym); annotation__update_column_widths(notes); symbol__set_annotate2(sym, true);
return 0;}
const char * const perf_disassembler__strs[] = { [PERF_DISASM_UNKNOWN] = "unknown", [PERF_DISASM_LLVM] = "llvm", [PERF_DISASM_CAPSTONE] = "capstone", [PERF_DISASM_OBJDUMP] = "objdump",};
static void annotation_options__add_disassembler(struct annotation_options *options, enum perf_disassembler dis){ for (u8 i = 0; i < ARRAY_SIZE(options->disassemblers); i++) { if (options->disassemblers[i] == dis) { /* Disassembler is already present then don't add again. */ return; } if (options->disassemblers[i] == PERF_DISASM_UNKNOWN) { /* Found a free slot. */ options->disassemblers[i] = dis; return; } } pr_err("Failed to add disassembler %d\n", dis);}
static int annotation_options__add_disassemblers_str(struct annotation_options *options, const char *str){ while (str && *str != '\0') { const char *comma = strchr(str, ','); int len = comma ? comma - str : (int)strlen(str); bool match = false;
for (u8 i = 0; i < ARRAY_SIZE(perf_disassembler__strs); i++) { const char *dis_str = perf_disassembler__strs[i];
if (len == (int)strlen(dis_str) && !strncmp(str, dis_str, len)) { annotation_options__add_disassembler(options, i); match = true; break; } } if (!match) { pr_err("Invalid disassembler '%.*s'\n", len, str); return -1; } str = comma ? comma + 1 : NULL; } return 0;}
static int annotation__config(const char *var, const char *value, void *data){ struct annotation_options *opt = data;
if (!strstarts(var, "annotate.")) return 0;
if (!strcmp(var, "annotate.offset_level")) { perf_config_u8(&opt->offset_level, "offset_level", value);
if (opt->offset_level > ANNOTATION__MAX_OFFSET_LEVEL) opt->offset_level = ANNOTATION__MAX_OFFSET_LEVEL; else if (opt->offset_level < ANNOTATION__MIN_OFFSET_LEVEL) opt->offset_level = ANNOTATION__MIN_OFFSET_LEVEL; } else if (!strcmp(var, "annotate.disassemblers")) { int err = annotation_options__add_disassemblers_str(opt, value);
if (err) return err; } else if (!strcmp(var, "annotate.hide_src_code")) { opt->hide_src_code = perf_config_bool("hide_src_code", value); } else if (!strcmp(var, "annotate.jump_arrows")) { opt->jump_arrows = perf_config_bool("jump_arrows", value); } else if (!strcmp(var, "annotate.show_linenr")) { opt->show_linenr = perf_config_bool("show_linenr", value); } else if (!strcmp(var, "annotate.show_nr_jumps")) { opt->show_nr_jumps = perf_config_bool("show_nr_jumps", value); } else if (!strcmp(var, "annotate.show_nr_samples")) { symbol_conf.show_nr_samples = perf_config_bool("show_nr_samples", value); } else if (!strcmp(var, "annotate.show_total_period")) { symbol_conf.show_total_period = perf_config_bool("show_total_period", value); } else if (!strcmp(var, "annotate.use_offset")) { opt->use_offset = perf_config_bool("use_offset", value); } else if (!strcmp(var, "annotate.disassembler_style")) { opt->disassembler_style = strdup(value); if (!opt->disassembler_style) { pr_err("Not enough memory for annotate.disassembler_style\n"); return -1; } } else if (!strcmp(var, "annotate.objdump")) { opt->objdump_path = strdup(value); if (!opt->objdump_path) { pr_err("Not enough memory for annotate.objdump\n"); return -1; } } else if (!strcmp(var, "annotate.addr2line")) { symbol_conf.addr2line_path = strdup(value); if (!symbol_conf.addr2line_path) { pr_err("Not enough memory for annotate.addr2line\n"); return -1; } } else if (!strcmp(var, "annotate.demangle")) { symbol_conf.demangle = perf_config_bool("demangle", value); } else if (!strcmp(var, "annotate.demangle_kernel")) { symbol_conf.demangle_kernel = perf_config_bool("demangle_kernel", value); } else { pr_debug("%s variable unknown, ignoring...", var); }
return 0;}
void annotation_options__init(void){ struct annotation_options *opt = &annotate_opts;
memset(opt, 0, sizeof(*opt));
/* Default values. */ opt->use_offset = true; opt->jump_arrows = true; opt->annotate_src = true; opt->offset_level = ANNOTATION__OFFSET_JUMP_TARGETS; opt->percent_type = PERCENT_PERIOD_LOCAL; opt->hide_src_code = true; opt->hide_src_code_on_title = true;}
void annotation_options__exit(void){ zfree(&annotate_opts.disassembler_style); zfree(&annotate_opts.objdump_path);}
static void annotation_options__default_init_disassemblers(struct annotation_options *options){ if (options->disassemblers[0] != PERF_DISASM_UNKNOWN) { /* Already initialized. */ return; }#ifdef HAVE_LIBLLVM_SUPPORT annotation_options__add_disassembler(options, PERF_DISASM_LLVM);#endif#ifdef HAVE_LIBCAPSTONE_SUPPORT annotation_options__add_disassembler(options, PERF_DISASM_CAPSTONE);#endif annotation_options__add_disassembler(options, PERF_DISASM_OBJDUMP);}
void annotation_config__init(void){ perf_config(annotation__config, &annotate_opts); annotation_options__default_init_disassemblers(&annotate_opts);}
static unsigned int parse_percent_type(char *str1, char *str2){ unsigned int type = (unsigned int) -1;
if (!strcmp("period", str1)) { if (!strcmp("local", str2)) type = PERCENT_PERIOD_LOCAL; else if (!strcmp("global", str2)) type = PERCENT_PERIOD_GLOBAL; }
if (!strcmp("hits", str1)) { if (!strcmp("local", str2)) type = PERCENT_HITS_LOCAL; else if (!strcmp("global", str2)) type = PERCENT_HITS_GLOBAL; }
return type;}
int annotate_parse_percent_type(const struct option *opt __maybe_unused, const char *_str, int unset __maybe_unused){ unsigned int type; char *str1, *str2; int err = -1;
str1 = strdup(_str); if (!str1) return -ENOMEM;
str2 = strchr(str1, '-'); if (!str2) goto out;
*str2++ = 0;
type = parse_percent_type(str1, str2); if (type == (unsigned int) -1) type = parse_percent_type(str2, str1); if (type != (unsigned int) -1) { annotate_opts.percent_type = type; err = 0; }
out: free(str1); return err;}
int annotate_check_args(void){ struct annotation_options *args = &annotate_opts;
if (args->prefix_strip && !args->prefix) { pr_err("--prefix-strip requires --prefix\n"); return -1; } return 0;}
static int arch__dwarf_regnum(const struct arch *arch, const char *str){ const char *p; char *regname, *q; int reg;
p = strchr(str, arch->objdump.register_char); if (p == NULL) return -1;
regname = strdup(p); if (regname == NULL) return -1;
q = strpbrk(regname, ",) "); if (q) *q = '\0';
reg = get_dwarf_regnum(regname, arch->id.e_machine, arch->id.e_flags); free(regname); return reg;}
/* * Get register number and access offset from the given instruction. * It assumes AT&T x86 asm format like OFFSET(REG). Maybe it needs * to revisit the format when it handles different architecture. * Fills @reg and @offset when return 0. */static int extract_reg_offset(const struct arch *arch, const char *str, struct annotated_op_loc *op_loc){ char *p;
if (arch->objdump.register_char == 0) return -1;
/* * It should start from offset, but it's possible to skip 0 * in the asm. So 0(%rax) should be same as (%rax). * * However, it also start with a segment select register like * %gs:0x18(%rbx). In that case it should skip the part. */ if (*str == arch->objdump.register_char) { if (arch__is_x86(arch)) { /* FIXME: Handle other segment registers */ if (!strncmp(str, "%gs:", 4)) op_loc->segment = INSN_SEG_X86_GS; }
while (*str && !isdigit(*str) && *str != arch->objdump.memory_ref_char) str++; }
op_loc->offset = strtol(str, &p, 0); op_loc->reg1 = arch__dwarf_regnum(arch, p); if (op_loc->reg1 == -1) return -1;
/* Get the second register */ if (op_loc->multi_regs) op_loc->reg2 = arch__dwarf_regnum(arch, p + 1);
return 0;}
/** * annotate_get_insn_location - Get location of instruction * @arch: the architecture info * @dl: the target instruction * @loc: a buffer to save the data * * Get detailed location info (register and offset) in the instruction. * It needs both source and target operand and whether it accesses a * memory location. The offset field is meaningful only when the * corresponding mem flag is set. The reg2 field is meaningful only * when multi_regs flag is set. * * Some examples on x86: * * mov (%rax), %rcx # src_reg1 = rax, src_mem = 1, src_offset = 0 * # dst_reg1 = rcx, dst_mem = 0 * * mov 0x18, %r8 # src_reg1 = -1, src_mem = 0 * # dst_reg1 = r8, dst_mem = 0 * * mov %rsi, 8(%rbx,%rcx,4) # src_reg1 = rsi, src_mem = 0, src_multi_regs = 0 * # dst_reg1 = rbx, dst_reg2 = rcx, dst_mem = 1 * # dst_multi_regs = 1, dst_offset = 8 */int annotate_get_insn_location(const struct arch *arch, struct disasm_line *dl, struct annotated_insn_loc *loc){ struct ins_operands *ops; struct annotated_op_loc *op_loc; int i;
if (ins__is_lock(&dl->ins)) ops = dl->ops.locked.ops; else ops = &dl->ops;
if (ops == NULL) return -1;
memset(loc, 0, sizeof(*loc));
for_each_insn_op_loc(loc, i, op_loc) { const char *insn_str = ops->source.raw; bool multi_regs = ops->source.multi_regs; bool mem_ref = ops->source.mem_ref;
if (i == INSN_OP_TARGET) { insn_str = ops->target.raw; multi_regs = ops->target.multi_regs; mem_ref = ops->target.mem_ref; }
/* Invalidate the register by default */ op_loc->reg1 = -1; op_loc->reg2 = -1;
if (insn_str == NULL) { if (!arch__is_powerpc(arch)) continue; }
/* * For powerpc, call get_powerpc_regs function which extracts the * required fields for op_loc, ie reg1, reg2, offset from the * raw instruction. */ if (arch__is_powerpc(arch)) { op_loc->mem_ref = mem_ref; op_loc->multi_regs = multi_regs; get_powerpc_regs(dl->raw.raw_insn, !i, op_loc); } else if (strchr(insn_str, arch->objdump.memory_ref_char)) { op_loc->mem_ref = true; op_loc->multi_regs = multi_regs; extract_reg_offset(arch, insn_str, op_loc); } else { const char *s = insn_str; char *p = NULL;
if (arch__is_x86(arch)) { /* FIXME: Handle other segment registers */ if (!strncmp(insn_str, "%gs:", 4)) { op_loc->segment = INSN_SEG_X86_GS; op_loc->offset = strtol(insn_str + 4, &p, 0); if (p && p != insn_str + 4) op_loc->imm = true; continue; } }
if (*s == arch->objdump.register_char) { op_loc->reg1 = arch__dwarf_regnum(arch, s); } else if (*s == arch->objdump.imm_char) { op_loc->offset = strtol(s + 1, &p, 0); if (p && p != s + 1) op_loc->imm = true; } } }
return 0;}
static struct disasm_line *find_disasm_line(struct symbol *sym, u64 ip, bool allow_update){ struct disasm_line *dl; struct annotation *notes;
notes = symbol__annotation(sym);
list_for_each_entry(dl, ¬es->src->source, al.node) { if (dl->al.offset == -1) continue;
if (sym->start + dl->al.offset == ip) { /* * llvm-objdump places "lock" in a separate line and * in that case, we want to get the next line. */ if (ins__is_lock(&dl->ins) && *dl->ops.raw == '\0' && allow_update) { ip++; continue; } return dl; } } return NULL;}
static struct annotated_item_stat *annotate_data_stat(struct list_head *head, const char *name){ struct annotated_item_stat *istat;
list_for_each_entry(istat, head, list) { if (!strcmp(istat->name, name)) return istat; }
istat = zalloc(sizeof(*istat)); if (istat == NULL) return NULL;
istat->name = strdup(name); if ((istat->name == NULL) || (!strlen(istat->name))) { free(istat); return NULL; }
list_add_tail(&istat->list, head); return istat;}
static bool is_stack_operation(const struct arch *arch, struct disasm_line *dl){ if (arch__is_x86(arch)) { if (!strncmp(dl->ins.name, "push", 4) || !strncmp(dl->ins.name, "pop", 3) || !strncmp(dl->ins.name, "call", 4) || !strncmp(dl->ins.name, "ret", 3)) return true; }
return false;}
static bool is_stack_canary(const struct arch *arch, struct annotated_op_loc *loc){ /* On x86_64, %gs:40 is used for stack canary */ if (arch__is_x86(arch)) { if (loc->segment == INSN_SEG_X86_GS && loc->imm && loc->offset == 40) return true; }
return false;}
/** * Returns true if the instruction has a memory operand without * performing a load/store */static bool is_address_gen_insn(const struct arch *arch, struct disasm_line *dl){ if (arch__is_x86(arch)) { if (!strncmp(dl->ins.name, "lea", 3)) return true; }
return false;}
static struct disasm_line *annotation__prev_asm_line(struct annotation *notes, struct disasm_line *curr){ struct list_head *sources = ¬es->src->source; struct disasm_line *prev;
if (curr == list_first_entry(sources, struct disasm_line, al.node)) return NULL;
prev = list_prev_entry(curr, al.node); while (prev->al.offset == -1 && prev != list_first_entry(sources, struct disasm_line, al.node)) prev = list_prev_entry(prev, al.node);
if (prev->al.offset == -1) return NULL;
return prev;}
static struct disasm_line *annotation__next_asm_line(struct annotation *notes, struct disasm_line *curr){ struct list_head *sources = ¬es->src->source; struct disasm_line *next;
if (curr == list_last_entry(sources, struct disasm_line, al.node)) return NULL;
next = list_next_entry(curr, al.node); while (next->al.offset == -1 && next != list_last_entry(sources, struct disasm_line, al.node)) next = list_next_entry(next, al.node);
if (next->al.offset == -1) return NULL;
return next;}
u64 annotate_calc_pcrel(struct map_symbol *ms, u64 ip, int offset, struct disasm_line *dl){ struct annotation *notes; struct disasm_line *next; u64 addr;
notes = symbol__annotation(ms->sym); /* * PC-relative addressing starts from the next instruction address * But the IP is for the current instruction. Since disasm_line * doesn't have the instruction size, calculate it using the next * disasm_line. If it's the last one, we can use symbol's end * address directly. */ next = annotation__next_asm_line(notes, dl); if (next == NULL) addr = ms->sym->end + offset; else addr = ip + (next->al.offset - dl->al.offset) + offset;
return map__rip_2objdump(ms->map, addr);}
static struct debuginfo_cache { struct dso *dso; struct debuginfo *dbg;} di_cache;
void debuginfo_cache__delete(void){ dso__put(di_cache.dso); di_cache.dso = NULL;
debuginfo__delete(di_cache.dbg); di_cache.dbg = NULL;}
static struct annotated_data_type *__hist_entry__get_data_type(struct hist_entry *he, const struct arch *arch, struct debuginfo *dbg, struct disasm_line *dl, int *type_offset){ struct map_symbol *ms = &he->ms; struct annotated_insn_loc loc; struct annotated_op_loc *op_loc; struct annotated_data_type *mem_type; struct annotated_item_stat *istat; int i;
istat = annotate_data_stat(&ann_insn_stat, dl->ins.name); if (istat == NULL) { ann_data_stat.no_insn++; return NO_TYPE; }
if (annotate_get_insn_location(arch, dl, &loc) < 0) { ann_data_stat.no_insn_ops++; istat->bad++; return NO_TYPE; }
if (is_stack_operation(arch, dl)) { istat->good++; *type_offset = 0; return &stackop_type; }
if (is_address_gen_insn(arch, dl)) { istat->bad++; ann_data_stat.no_mem_ops++; return NO_TYPE; }
for_each_insn_op_loc(&loc, i, op_loc) { struct data_loc_info dloc = { .arch = arch, .thread = he->thread, .ms = ms, .ip = ms->sym->start + dl->al.offset, .cpumode = he->cpumode, .op = op_loc, .di = dbg, };
if (!op_loc->mem_ref && op_loc->segment == INSN_SEG_NONE) continue;
/* PC-relative addressing */ if (op_loc->reg1 == DWARF_REG_PC) { dloc.var_addr = annotate_calc_pcrel(ms, dloc.ip, op_loc->offset, dl); }
/* This CPU access in kernel - pretend PC-relative addressing */ if (dso__kernel(map__dso(ms->map)) && arch__is_x86(arch) && op_loc->segment == INSN_SEG_X86_GS && op_loc->imm) { dloc.var_addr = op_loc->offset; op_loc->reg1 = DWARF_REG_PC; }
mem_type = find_data_type(&dloc);
if (mem_type == NULL && is_stack_canary(arch, op_loc)) { istat->good++; *type_offset = 0; return &canary_type; }
if (mem_type) istat->good++; else istat->bad++;
if (symbol_conf.annotate_data_sample) { struct evsel *evsel = hists_to_evsel(he->hists);
annotated_data_type__update_samples(mem_type, evsel, dloc.type_offset, he->stat.nr_events, he->stat.period); } *type_offset = dloc.type_offset; return mem_type ?: NO_TYPE; }
/* retry with a fused instruction */ return NULL;}
/** * hist_entry__get_data_type - find data type for given hist entry * @he: hist entry * * This function first annotates the instruction at @he->ip and extracts * register and offset info from it. Then it searches the DWARF debug * info to get a variable and type information using the address, register, * and offset. */struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he){ struct map_symbol *ms = &he->ms; struct evsel *evsel = hists_to_evsel(he->hists); const struct arch *arch; struct disasm_line *dl; struct annotated_data_type *mem_type; struct annotated_item_stat *istat; u64 ip = he->ip;
ann_data_stat.total++;
if (ms->map == NULL || ms->sym == NULL) { ann_data_stat.no_sym++; return NULL; }
if (!symbol_conf.init_annotation) { ann_data_stat.no_sym++; return NULL; }
/* * di_cache holds a pair of values, but code below assumes * di_cache.dso can be compared/updated and di_cache.dbg can be * read/updated independently from each other. That assumption only * holds in single threaded code. */ assert(perf_singlethreaded);
if (map__dso(ms->map) != di_cache.dso) { dso__put(di_cache.dso); di_cache.dso = dso__get(map__dso(ms->map));
debuginfo__delete(di_cache.dbg); di_cache.dbg = dso__debuginfo(di_cache.dso); }
if (di_cache.dbg == NULL) { ann_data_stat.no_dbginfo++; return NULL; }
/* Make sure it has the disasm of the function */ if (symbol__annotate(ms, evsel, &arch) < 0) { ann_data_stat.no_insn++; return NULL; }
/* * Get a disasm to extract the location from the insn. * This is too slow... */ dl = find_disasm_line(ms->sym, ip, /*allow_update=*/true); if (dl == NULL) { ann_data_stat.no_insn++; return NULL; }
retry: mem_type = __hist_entry__get_data_type(he, arch, di_cache.dbg, dl, &he->mem_type_off); if (mem_type) return mem_type == NO_TYPE ? NULL : mem_type;
/* * Some instructions can be fused and the actual memory access came * from the previous instruction. */ if (dl->al.offset > 0) { struct annotation *notes; struct disasm_line *prev_dl;
notes = symbol__annotation(ms->sym); prev_dl = annotation__prev_asm_line(notes, dl);
if (prev_dl && ins__is_fused(arch, prev_dl->ins.name, dl->ins.name)) { dl = prev_dl; goto retry; } }
ann_data_stat.no_mem_ops++; istat = annotate_data_stat(&ann_insn_stat, dl->ins.name); if (istat) istat->bad++; return NULL;}
/* Basic block traversal (BFS) data structure */struct basic_block_data { struct list_head queue; struct list_head visited;};
/* * During the traversal, it needs to know the parent block where the current * block block started from. Note that single basic block can be parent of * two child basic blocks (in case of condition jump). */struct basic_block_link { struct list_head node; struct basic_block_link *parent; struct annotated_basic_block *bb;};
/* Check any of basic block in the list already has the offset */static bool basic_block_has_offset(struct list_head *head, s64 offset){ struct basic_block_link *link;
list_for_each_entry(link, head, node) { s64 begin_offset = link->bb->begin->al.offset; s64 end_offset = link->bb->end->al.offset;
if (begin_offset <= offset && offset <= end_offset) return true; } return false;}
static bool is_new_basic_block(struct basic_block_data *bb_data, struct disasm_line *dl){ s64 offset = dl->al.offset;
if (basic_block_has_offset(&bb_data->visited, offset)) return false; if (basic_block_has_offset(&bb_data->queue, offset)) return false; return true;}
/* Add a basic block starting from dl and link it to the parent */static int add_basic_block(struct basic_block_data *bb_data, struct basic_block_link *parent, struct disasm_line *dl){ struct annotated_basic_block *bb; struct basic_block_link *link;
if (dl == NULL) return -1;
if (!is_new_basic_block(bb_data, dl)) return 0;
bb = zalloc(sizeof(*bb)); if (bb == NULL) return -1;
bb->begin = dl; bb->end = dl; INIT_LIST_HEAD(&bb->list);
link = malloc(sizeof(*link)); if (link == NULL) { free(bb); return -1; }
link->bb = bb; link->parent = parent; list_add_tail(&link->node, &bb_data->queue); return 0;}
/* Returns true when it finds the target in the current basic block */static bool process_basic_block(struct basic_block_data *bb_data, struct basic_block_link *link, struct symbol *sym, u64 target){ struct disasm_line *dl, *next_dl, *last_dl; struct annotation *notes = symbol__annotation(sym); bool found = false;
dl = link->bb->begin; /* Check if it's already visited */ if (basic_block_has_offset(&bb_data->visited, dl->al.offset)) return false;
last_dl = list_last_entry(¬es->src->source, struct disasm_line, al.node); if (last_dl->al.offset == -1) last_dl = annotation__prev_asm_line(notes, last_dl);
if (last_dl == NULL) return false;
list_for_each_entry_from(dl, ¬es->src->source, al.node) { /* Skip comment or debug info line */ if (dl->al.offset == -1) continue; /* Found the target instruction */ if (sym->start + dl->al.offset == target) { found = true; break; } /* End of the function, finish the block */ if (dl == last_dl) break; /* 'return' instruction finishes the block */ if (ins__is_ret(&dl->ins)) break; /* normal instructions are part of the basic block */ if (!ins__is_jump(&dl->ins)) continue; /* jump to a different function, tail call or return */ if (dl->ops.target.outside) break; /* jump instruction creates new basic block(s) */ next_dl = find_disasm_line(sym, sym->start + dl->ops.target.offset, /*allow_update=*/false); if (next_dl) add_basic_block(bb_data, link, next_dl);
/* * FIXME: determine conditional jumps properly. * Conditional jumps create another basic block with the * next disasm line. */ if (!strstr(dl->ins.name, "jmp")) { next_dl = annotation__next_asm_line(notes, dl); if (next_dl) add_basic_block(bb_data, link, next_dl); } break;
} link->bb->end = dl; return found;}
/* * It founds a target basic block, build a proper linked list of basic blocks * by following the link recursively. */static void link_found_basic_blocks(struct basic_block_link *link, struct list_head *head){ while (link) { struct basic_block_link *parent = link->parent;
list_move(&link->bb->list, head); list_del(&link->node); free(link);
link = parent; }}
static void delete_basic_blocks(struct basic_block_data *bb_data){ struct basic_block_link *link, *tmp;
list_for_each_entry_safe(link, tmp, &bb_data->queue, node) { list_del(&link->node); zfree(&link->bb); free(link); }
list_for_each_entry_safe(link, tmp, &bb_data->visited, node) { list_del(&link->node); zfree(&link->bb); free(link); }}
/** * annotate_get_basic_blocks - Get basic blocks for given address range * @sym: symbol to annotate * @src: source address * @dst: destination address * @head: list head to save basic blocks * * This function traverses disasm_lines from @src to @dst and save them in a * list of annotated_basic_block to @head. It uses BFS to find the shortest * path between two. The basic_block_link is to maintain parent links so * that it can build a list of blocks from the start. */int annotate_get_basic_blocks(struct symbol *sym, s64 src, s64 dst, struct list_head *head){ struct basic_block_data bb_data = { .queue = LIST_HEAD_INIT(bb_data.queue), .visited = LIST_HEAD_INIT(bb_data.visited), }; struct basic_block_link *link; struct disasm_line *dl; int ret = -1;
dl = find_disasm_line(sym, src, /*allow_update=*/false); if (dl == NULL) return -1;
if (add_basic_block(&bb_data, /*parent=*/NULL, dl) < 0) return -1;
/* Find shortest path from src to dst using BFS */ while (!list_empty(&bb_data.queue)) { link = list_first_entry(&bb_data.queue, struct basic_block_link, node);
if (process_basic_block(&bb_data, link, sym, dst)) { link_found_basic_blocks(link, head); ret = 0; break; } list_move(&link->node, &bb_data.visited); } delete_basic_blocks(&bb_data); return ret;}