tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 __maybe_unused,
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, event->ip.pid);
28
29 if (thread == NULL) {
30 pr_err("problem processing %d event, skipping it.\n",
31 event->header.type);
32 return -1;
33 }
34
35 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
36 event->ip.ip, &al);
37
38 if (al.map != NULL)
39 al.map->dso->hit = 1;
40
41 return 0;
42}
43
44static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
45 union perf_event *event,
46 struct perf_sample *sample
47 __maybe_unused,
48 struct machine *machine)
49{
50 struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
51
52 dump_printf("(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid,
53 event->fork.ppid, event->fork.ptid);
54
55 if (thread) {
56 rb_erase(&thread->rb_node, &machine->threads);
57 machine->last_match = NULL;
58 thread__delete(thread);
59 }
60
61 return 0;
62}
63
64struct perf_tool build_id__mark_dso_hit_ops = {
65 .sample = build_id__mark_dso_hit,
66 .mmap = perf_event__process_mmap,
67 .fork = perf_event__process_fork,
68 .exit = perf_event__exit_del_thread,
69 .attr = perf_event__process_attr,
70 .build_id = perf_event__process_build_id,
71};
72
73int build_id__sprintf(const u8 *build_id, int len, char *bf)
74{
75 char *bid = bf;
76 const u8 *raw = build_id;
77 int i;
78
79 for (i = 0; i < len; ++i) {
80 sprintf(bid, "%02x", *raw);
81 ++raw;
82 bid += 2;
83 }
84
85 return raw - build_id;
86}
87
88char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
89{
90 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
91
92 if (!self->has_build_id)
93 return NULL;
94
95 build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
96 if (bf == NULL) {
97 if (asprintf(&bf, "%s/.build-id/%.2s/%s", buildid_dir,
98 build_id_hex, build_id_hex + 2) < 0)
99 return NULL;
100 } else
101 snprintf(bf, size, "%s/.build-id/%.2s/%s", buildid_dir,
102 build_id_hex, build_id_hex + 2);
103 return bf;
104}