LXR linux/tools/perf/util/build-id.c

   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(const struct dso *dso, char *bf, size_t size)
  93{
  94        char build_id_hex[BUILD_ID_SIZE * 2 + 1];
  95
  96        if (!dso->has_build_id)
  97                return NULL;
  98
  99        build_id__sprintf(dso->build_id, sizeof(dso->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