build-id.c revision 7d82a4640abdcc3ffbd89c7971a11e4ac7953b7f 
1/*
2 * build-id.c
3 *
4 * build-id support
5 *
6 * Copyright (C) 2009, 2010 Red Hat Inc.
7 * Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo <acme@redhat.com>
8 */
9#include "util.h"
10#include <stdio.h>
11#include "build-id.h"
12#include "event.h"
13#include "symbol.h"
14/* ANDROID_CHANGE_BEGIN */
15#ifdef __APPLE__
16#include "include/linux/kernel.h"
17#endif
18/* ANDROID_CHANGE_END */
19#include "debug.h"
20
21static int build_id__mark_dso_hit(union perf_event *event,
22				  struct perf_sample *sample __used,
23				  struct perf_evsel *evsel __used,
24				  struct perf_session *session)
25{
26	struct addr_location al;
27	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
28	struct thread *thread = perf_session__findnew(session, event->ip.pid);
29
30	if (thread == NULL) {
31		pr_err("problem processing %d event, skipping it.\n",
32			event->header.type);
33		return -1;
34	}
35
36	thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
37			      event->ip.pid, event->ip.ip, &al);
38
39	if (al.map != NULL)
40		al.map->dso->hit = 1;
41
42	return 0;
43}
44
45static int perf_event__exit_del_thread(union perf_event *event,
46				       struct perf_sample *sample __used,
47				       struct perf_session *session)
48{
49	struct thread *thread = perf_session__findnew(session, event->fork.tid);
50
51	dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
52		    event->fork.ppid, event->fork.ptid);
53
54	if (thread) {
55		rb_erase(&thread->rb_node, &session->threads);
56		session->last_match = NULL;
57		thread__delete(thread);
58	}
59
60	return 0;
61}
62
63struct perf_event_ops build_id__mark_dso_hit_ops = {
64	.sample	= build_id__mark_dso_hit,
65	.mmap	= perf_event__process_mmap,
66	.fork	= perf_event__process_task,
67	.exit	= perf_event__exit_del_thread,
68};
69
70char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
71{
72	char build_id_hex[BUILD_ID_SIZE * 2 + 1];
73
74	if (!self->has_build_id)
75		return NULL;
76
77	build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
78	if (bf == NULL) {
79		if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
80			     build_id_hex, build_id_hex + 2) < 0)
81			return NULL;
82	} else
83		snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
84			 build_id_hex, build_id_hex + 2);
85	return bf;
86}
87