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#include <linux/kernel.h>
15#include "debug.h"
16#include "session.h"
17#include "tool.h"
18
19int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused,
20			   union perf_event *event,
21			   struct perf_sample *sample,
22			   struct perf_evsel *evsel __maybe_unused,
23			   struct machine *machine)
24{
25	struct addr_location al;
26	u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
27	struct thread *thread = machine__findnew_thread(machine, sample->pid,
28							sample->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, machine, cpumode, MAP__FUNCTION,
37			      sample->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(struct perf_tool *tool __maybe_unused,
46				       union perf_event *event,
47				       struct perf_sample *sample
48				       __maybe_unused,
49				       struct machine *machine)
50{
51	struct thread *thread = machine__findnew_thread(machine,
52							event->fork.pid,
53							event->fork.tid);
54
55	dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
56		    event->fork.ppid, event->fork.ptid);
57
58	if (thread) {
59		rb_erase(&thread->rb_node, &machine->threads);
60		machine->last_match = NULL;
61		thread__delete(thread);
62	}
63
64	return 0;
65}
66
67struct perf_tool build_id__mark_dso_hit_ops = {
68	.sample	= build_id__mark_dso_hit,
69	.mmap	= perf_event__process_mmap,
70	.mmap2	= perf_event__process_mmap2,
71	.fork	= perf_event__process_fork,
72	.exit	= perf_event__exit_del_thread,
73	.attr		 = perf_event__process_attr,
74	.build_id	 = perf_event__process_build_id,
75};
76
77int build_id__sprintf(const u8 *build_id, int len, char *bf)
78{
79	char *bid = bf;
80	const u8 *raw = build_id;
81	int i;
82
83	for (i = 0; i < len; ++i) {
84		sprintf(bid, "%02x", *raw);
85		++raw;
86		bid += 2;
87	}
88
89	return raw - build_id;
90}
91
92char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
93{
94	char build_id_hex[BUILD_ID_SIZE * 2 + 1];
95
96	if (!self->has_build_id)
97		return NULL;
98
99	build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
100	if (bf == NULL) {
101		if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
102			     build_id_hex, build_id_hex + 2) < 0)
103			return NULL;
104	} else
105		snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
106			 build_id_hex, build_id_hex + 2);
107	return bf;
108}
109