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
  19 static int build_id__mark_dso_hit(struct perf_tool *tool __used,
  20                                   union perf_event *event,
  21                                   struct perf_sample *sample __used,
  22                                   struct perf_evsel *evsel __used,
  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
  44 static int perf_event__exit_del_thread(struct perf_tool *tool __used,
  45                                        union perf_event *event,
  46                                        struct perf_sample *sample __used,
  47                                        struct machine *machine)
  48 {
  49         struct thread *thread = machine__findnew_thread(machine, 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, &machine->threads);
  56                 machine->last_match = NULL;
  57                 thread__delete(thread);
  58         }
  59
  60         return 0;
  61 }
  62
  63 struct perf_tool 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
  70 char *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 }