![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
Just another step in stopping the use of libnewt in perf. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-uy6s534uqxq8tenh6s3k8ocj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
321 lines
8 KiB
C
321 lines
8 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 "util/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 <linux/bitmap.h>
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static char const *input_name = "perf.data";
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static bool force, use_tui, use_stdio;
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static bool full_paths;
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static bool print_line;
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static const char *sym_hist_filter;
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static const char *cpu_list;
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static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
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static int perf_evlist__add_sample(struct perf_evlist *evlist,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct addr_location *al)
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{
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struct hist_entry *he;
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int ret;
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if (sym_hist_filter != NULL &&
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(al->sym == NULL || strcmp(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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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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}
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return 0;
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}
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he = __hists__add_entry(&evsel->hists, al, NULL, 1);
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if (he == NULL)
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return -ENOMEM;
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ret = 0;
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if (he->ms.sym != NULL) {
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struct annotation *notes = symbol__annotation(he->ms.sym);
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if (notes->src == NULL &&
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symbol__alloc_hist(he->ms.sym, evlist->nr_entries) < 0)
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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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}
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evsel->hists.stats.total_period += sample->period;
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hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
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return ret;
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}
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static int process_sample_event(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 perf_session *session)
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{
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struct addr_location al;
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if (perf_event__preprocess_sample(event, session, &al, sample,
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symbol__annotate_init) < 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 (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
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return 0;
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if (!al.filtered &&
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perf_evlist__add_sample(session->evlist, sample, evsel, &al)) {
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pr_warning("problem incrementing symbol count, "
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"skipping event\n");
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return -1;
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}
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return 0;
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}
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static int hist_entry__tty_annotate(struct hist_entry *he, int evidx)
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{
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return symbol__tty_annotate(he->ms.sym, he->ms.map, evidx,
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print_line, full_paths, 0, 0);
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}
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static void hists__find_annotations(struct hists *self, int evidx,
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int nr_events)
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{
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struct rb_node *nd = rb_first(&self->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 > 0) {
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key = hist_entry__tui_annotate(he, evidx, nr_events,
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NULL, NULL, 0);
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switch (key) {
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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, evidx);
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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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free(notes->src);
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notes->src = NULL;
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}
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}
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}
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static struct perf_event_ops event_ops = {
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.sample = process_sample_event,
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.mmap = perf_event__process_mmap,
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.comm = perf_event__process_comm,
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.fork = perf_event__process_task,
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.ordered_samples = true,
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.ordering_requires_timestamps = true,
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};
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static int __cmd_annotate(void)
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{
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int ret;
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struct perf_session *session;
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struct perf_evsel *pos;
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u64 total_nr_samples;
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session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops);
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if (session == NULL)
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return -ENOMEM;
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if (cpu_list) {
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ret = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
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if (ret)
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goto out_delete;
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}
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ret = perf_session__process_events(session, &event_ops);
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if (ret)
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goto out_delete;
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if (dump_trace) {
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perf_session__fprintf_nr_events(session, stdout);
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goto out_delete;
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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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list_for_each_entry(pos, &session->evlist->entries, node) {
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struct hists *hists = &pos->hists;
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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);
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hists__output_resort(hists);
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hists__find_annotations(hists, pos->idx,
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session->evlist->nr_entries);
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}
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}
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if (total_nr_samples == 0) {
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ui__warning("The %s file has no samples!\n", input_name);
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goto out_delete;
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}
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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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static const char * const annotate_usage[] = {
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"perf annotate [<options>] <command>",
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NULL
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};
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static 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", &sym_hist_filter, "symbol",
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"symbol to annotate"),
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OPT_BOOLEAN('f', "force", &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, "tui", &use_tui, "Use the TUI interface"),
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OPT_BOOLEAN(0, "stdio", &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", &print_line,
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"print matching source lines (may be slow)"),
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OPT_BOOLEAN('P', "full-paths", &full_paths,
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"Don't shorten the displayed pathnames"),
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OPT_STRING('c', "cpu", &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_END()
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};
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int cmd_annotate(int argc, const char **argv, const char *prefix __used)
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{
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argc = parse_options(argc, argv, options, annotate_usage, 0);
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if (use_stdio)
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use_browser = 0;
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else if (use_tui)
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use_browser = 1;
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setup_browser(true);
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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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if (symbol__init() < 0)
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return -1;
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setup_sorting(annotate_usage, options);
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if (argc) {
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/*
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* Special case: if there's an argument left then assume tha
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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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sym_hist_filter = argv[0];
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}
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if (field_sep && *field_sep == '.') {
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pr_err("'.' is the only non valid --field-separator argument\n");
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return -1;
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}
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return __cmd_annotate();
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}
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