402 lines
10 KiB
C
402 lines
10 KiB
C
/*
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* builtin-annotate.c
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*
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* Builtin annotate command: Analyze the perf.data input file,
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* look up and read DSOs and symbol information and display
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* a histogram of results, along various sorting keys.
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*/
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#include "builtin.h"
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#include "util/util.h"
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#include "util/color.h"
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#include <linux/list.h>
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#include "util/cache.h"
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#include <linux/rbtree.h>
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#include "util/symbol.h"
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#include "perf.h"
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#include "util/debug.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/annotate.h"
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#include "util/event.h"
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#include <subcmd/parse-options.h>
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#include "util/parse-events.h"
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#include "util/thread.h"
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#include "util/sort.h"
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#include "util/hist.h"
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#include "util/session.h"
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#include "util/tool.h"
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#include "util/data.h"
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#include "arch/common.h"
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#include <dlfcn.h>
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#include <linux/bitmap.h>
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struct perf_annotate {
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struct perf_tool tool;
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struct perf_session *session;
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bool use_tui, use_stdio, use_gtk;
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bool full_paths;
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bool print_line;
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bool skip_missing;
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const char *sym_hist_filter;
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const char *cpu_list;
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DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
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};
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static int perf_evsel__add_sample(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct addr_location *al,
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struct perf_annotate *ann)
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{
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struct hists *hists = evsel__hists(evsel);
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struct hist_entry *he;
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int ret;
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if (ann->sym_hist_filter != NULL &&
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(al->sym == NULL ||
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strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
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/* We're only interested in a symbol named sym_hist_filter */
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/*
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* FIXME: why isn't this done in the symbol_filter when loading
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* the DSO?
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*/
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if (al->sym != NULL) {
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rb_erase(&al->sym->rb_node,
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&al->map->dso->symbols[al->map->type]);
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symbol__delete(al->sym);
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dso__reset_find_symbol_cache(al->map->dso);
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}
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return 0;
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}
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sample->period = 1;
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sample->weight = 1;
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he = __hists__add_entry(hists, al, NULL, NULL, NULL, sample, true);
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if (he == NULL)
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return -ENOMEM;
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ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
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hists__inc_nr_samples(hists, true);
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return ret;
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}
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static int process_sample_event(struct perf_tool *tool,
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union perf_event *event,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct machine *machine)
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{
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struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
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struct addr_location al;
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int ret = 0;
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if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
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pr_warning("problem processing %d event, skipping it.\n",
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event->header.type);
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return -1;
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}
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if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
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goto out_put;
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if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
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pr_warning("problem incrementing symbol count, "
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"skipping event\n");
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ret = -1;
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}
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out_put:
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addr_location__put(&al);
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return ret;
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}
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static int hist_entry__tty_annotate(struct hist_entry *he,
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struct perf_evsel *evsel,
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struct perf_annotate *ann)
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{
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return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel,
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ann->print_line, ann->full_paths, 0, 0);
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}
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static void hists__find_annotations(struct hists *hists,
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struct perf_evsel *evsel,
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struct perf_annotate *ann)
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{
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struct rb_node *nd = rb_first(&hists->entries), *next;
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int key = K_RIGHT;
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while (nd) {
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struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
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struct annotation *notes;
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if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
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goto find_next;
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notes = symbol__annotation(he->ms.sym);
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if (notes->src == NULL) {
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find_next:
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if (key == K_LEFT)
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nd = rb_prev(nd);
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else
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nd = rb_next(nd);
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continue;
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}
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if (use_browser == 2) {
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int ret;
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int (*annotate)(struct hist_entry *he,
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struct perf_evsel *evsel,
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struct hist_browser_timer *hbt);
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annotate = dlsym(perf_gtk_handle,
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"hist_entry__gtk_annotate");
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if (annotate == NULL) {
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ui__error("GTK browser not found!\n");
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return;
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}
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ret = annotate(he, evsel, NULL);
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if (!ret || !ann->skip_missing)
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return;
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/* skip missing symbols */
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nd = rb_next(nd);
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} else if (use_browser == 1) {
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key = hist_entry__tui_annotate(he, evsel, NULL);
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switch (key) {
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case -1:
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if (!ann->skip_missing)
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return;
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/* fall through */
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case K_RIGHT:
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next = rb_next(nd);
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break;
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case K_LEFT:
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next = rb_prev(nd);
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break;
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default:
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return;
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}
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if (next != NULL)
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nd = next;
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} else {
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hist_entry__tty_annotate(he, evsel, ann);
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nd = rb_next(nd);
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/*
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* Since we have a hist_entry per IP for the same
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* symbol, free he->ms.sym->src to signal we already
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* processed this symbol.
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*/
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zfree(¬es->src->cycles_hist);
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zfree(¬es->src);
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}
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}
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}
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static int __cmd_annotate(struct perf_annotate *ann)
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{
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int ret;
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struct perf_session *session = ann->session;
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struct perf_evsel *pos;
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u64 total_nr_samples;
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machines__set_symbol_filter(&session->machines, symbol__annotate_init);
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if (ann->cpu_list) {
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ret = perf_session__cpu_bitmap(session, ann->cpu_list,
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ann->cpu_bitmap);
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if (ret)
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goto out;
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}
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if (!objdump_path) {
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ret = perf_env__lookup_objdump(&session->header.env);
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if (ret)
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goto out;
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}
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ret = perf_session__process_events(session);
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if (ret)
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goto out;
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if (dump_trace) {
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perf_session__fprintf_nr_events(session, stdout);
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perf_evlist__fprintf_nr_events(session->evlist, stdout);
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goto out;
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}
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if (verbose > 3)
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perf_session__fprintf(session, stdout);
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if (verbose > 2)
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perf_session__fprintf_dsos(session, stdout);
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total_nr_samples = 0;
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evlist__for_each(session->evlist, pos) {
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struct hists *hists = evsel__hists(pos);
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u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
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if (nr_samples > 0) {
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total_nr_samples += nr_samples;
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hists__collapse_resort(hists, NULL);
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/* Don't sort callchain */
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perf_evsel__reset_sample_bit(pos, CALLCHAIN);
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hists__output_resort(hists, NULL);
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if (symbol_conf.event_group &&
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!perf_evsel__is_group_leader(pos))
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continue;
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hists__find_annotations(hists, pos, ann);
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}
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}
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if (total_nr_samples == 0) {
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ui__error("The %s file has no samples!\n", session->file->path);
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goto out;
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}
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if (use_browser == 2) {
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void (*show_annotations)(void);
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show_annotations = dlsym(perf_gtk_handle,
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"perf_gtk__show_annotations");
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if (show_annotations == NULL) {
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ui__error("GTK browser not found!\n");
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goto out;
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}
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show_annotations();
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}
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out:
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return ret;
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}
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static const char * const annotate_usage[] = {
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"perf annotate [<options>]",
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NULL
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};
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int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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struct perf_annotate annotate = {
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.tool = {
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.sample = process_sample_event,
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.mmap = perf_event__process_mmap,
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.mmap2 = perf_event__process_mmap2,
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.comm = perf_event__process_comm,
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.exit = perf_event__process_exit,
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.fork = perf_event__process_fork,
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.ordered_events = true,
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.ordering_requires_timestamps = true,
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},
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};
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struct perf_data_file file = {
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.mode = PERF_DATA_MODE_READ,
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};
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const struct option options[] = {
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OPT_STRING('i', "input", &input_name, "file",
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"input file name"),
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OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
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"only consider symbols in these dsos"),
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OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
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"symbol to annotate"),
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OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show symbol address, etc)"),
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OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
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"dump raw trace in ASCII"),
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OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
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OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
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OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
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OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
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"file", "vmlinux pathname"),
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OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
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"load module symbols - WARNING: use only with -k and LIVE kernel"),
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OPT_BOOLEAN('l', "print-line", &annotate.print_line,
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"print matching source lines (may be slow)"),
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OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,
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"Don't shorten the displayed pathnames"),
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OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
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"Skip symbols that cannot be annotated"),
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OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
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OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
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"Look for files with symbols relative to this directory"),
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OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
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"Interleave source code with assembly code (default)"),
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OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
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"Display raw encoding of assembly instructions (default)"),
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OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
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"Specify disassembler style (e.g. -M intel for intel syntax)"),
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OPT_STRING(0, "objdump", &objdump_path, "path",
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"objdump binary to use for disassembly and annotations"),
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OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
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"Show event group information together"),
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OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
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"Show a column with the sum of periods"),
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OPT_END()
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};
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int ret = hists__init();
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if (ret < 0)
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return ret;
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argc = parse_options(argc, argv, options, annotate_usage, 0);
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if (argc) {
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/*
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* Special case: if there's an argument left then assume that
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* it's a symbol filter:
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*/
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if (argc > 1)
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usage_with_options(annotate_usage, options);
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annotate.sym_hist_filter = argv[0];
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}
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file.path = input_name;
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annotate.session = perf_session__new(&file, false, &annotate.tool);
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if (annotate.session == NULL)
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return -1;
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symbol_conf.priv_size = sizeof(struct annotation);
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symbol_conf.try_vmlinux_path = true;
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ret = symbol__init(&annotate.session->header.env);
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if (ret < 0)
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goto out_delete;
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if (setup_sorting(NULL) < 0)
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usage_with_options(annotate_usage, options);
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if (annotate.use_stdio)
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use_browser = 0;
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else if (annotate.use_tui)
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use_browser = 1;
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else if (annotate.use_gtk)
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use_browser = 2;
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setup_browser(true);
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ret = __cmd_annotate(&annotate);
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out_delete:
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/*
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* Speed up the exit process, for large files this can
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* take quite a while.
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*
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* XXX Enable this when using valgrind or if we ever
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* librarize this command.
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*
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* Also experiment with obstacks to see how much speed
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* up we'll get here.
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*
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* perf_session__delete(session);
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*/
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return ret;
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}
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