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9e69c21082
Resolving the sample->id to an evsel since the most advanced tools, report and annotate, and the others will too when they evolve to properly support multi-event perf.data files. Good also because it does an extra validation, checking that the ID is valid when present. When that is not the case, the overhead is just a branch + function call (perf_evlist__id2evsel). Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
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* build-id.c
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*
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* build-id support
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*
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* Copyright (C) 2009, 2010 Red Hat Inc.
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* Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo <acme@redhat.com>
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*/
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#include "util.h"
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#include <stdio.h>
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#include "build-id.h"
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#include "event.h"
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#include "symbol.h"
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#include <linux/kernel.h>
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#include "debug.h"
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static int build_id__mark_dso_hit(union perf_event *event,
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struct perf_sample *sample __used,
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struct perf_evsel *evsel __used,
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struct perf_session *session)
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{
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struct addr_location al;
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u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
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struct thread *thread = perf_session__findnew(session, event->ip.pid);
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if (thread == NULL) {
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pr_err("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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thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
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event->ip.pid, event->ip.ip, &al);
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if (al.map != NULL)
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al.map->dso->hit = 1;
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return 0;
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}
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static int perf_event__exit_del_thread(union perf_event *event,
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struct perf_sample *sample __used,
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struct perf_session *session)
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{
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struct thread *thread = perf_session__findnew(session, event->fork.tid);
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dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
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event->fork.ppid, event->fork.ptid);
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if (thread) {
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rb_erase(&thread->rb_node, &session->threads);
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session->last_match = NULL;
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thread__delete(thread);
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}
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return 0;
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}
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struct perf_event_ops build_id__mark_dso_hit_ops = {
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.sample = build_id__mark_dso_hit,
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.mmap = perf_event__process_mmap,
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.fork = perf_event__process_task,
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.exit = perf_event__exit_del_thread,
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};
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char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
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{
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char build_id_hex[BUILD_ID_SIZE * 2 + 1];
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if (!self->has_build_id)
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return NULL;
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build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
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if (bf == NULL) {
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if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
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build_id_hex, build_id_hex + 2) < 0)
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return NULL;
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} else
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snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
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build_id_hex, build_id_hex + 2);
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return bf;
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}
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