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
build_id__mark_dso_hit(struct perf_tool * tool __maybe_unused,union perf_event * event,struct perf_sample * sample,struct perf_evsel * evsel __maybe_unused,struct machine * machine)19 int 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
perf_event__exit_del_thread(struct perf_tool * tool __maybe_unused,union perf_event * event,struct perf_sample * sample __maybe_unused,struct machine * machine)45 static 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
67 struct 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
build_id__sprintf(const u8 * build_id,int len,char * bf)77 int 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
dso__build_id_filename(struct dso * self,char * bf,size_t size)92 char *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