tools/perf/builtin-buildid-list.c

   1 /*
   2  * builtin-buildid-list.c
   3  *
   4  * Builtin buildid-list command: list buildids in perf.data, in the running
   5  * kernel and in ELF files.
   6  *
   7  * Copyright (C) 2009, Red Hat Inc.
   8  * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
   9  */
  10 #include "builtin.h"
  11 #include "perf.h"
  12 #include "util/build-id.h"
  13 #include "util/cache.h"
  14 #include "util/debug.h"
  15 #include "util/parse-options.h"
  16 #include "util/session.h"
  17 #include "util/symbol.h"
  18
  19 #include <libelf.h>
  20
  21 static char const *input_name = "perf.data";
  22 static bool force;
  23 static bool show_kernel;
  24 static bool with_hits;
  25
  26 static const char * const buildid_list_usage[] = {
  27         "perf buildid-list [<options>]",
  28         NULL
  29 };
  30
  31 static const struct option options[] = {
  32         OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
  33         OPT_STRING('i', "input", &input_name, "file",
  34                     "input file name"),
  35         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
  36         OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
  37         OPT_INCR('v', "verbose", &verbose,
  38                     "be more verbose"),
  39         OPT_END()
  40 };
  41
  42 static int perf_session__list_build_ids(void)
  43 {
  44         struct perf_session *session;
  45
  46         session = perf_session__new(input_name, O_RDONLY, force, false,
  47                                     &build_id__mark_dso_hit_ops);
  48         if (session == NULL)
  49                 return -1;
  50
  51         if (with_hits)
  52                 perf_session__process_events(session, &build_id__mark_dso_hit_ops);
  53
  54         perf_session__fprintf_dsos_buildid(session, stdout, with_hits);
  55
  56         perf_session__delete(session);
  57         return 0;
  58 }
  59
  60 static int sysfs__fprintf_build_id(FILE *fp)
  61 {
  62         u8 kallsyms_build_id[BUILD_ID_SIZE];
  63         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
  64
  65         if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
  66                                  sizeof(kallsyms_build_id)) != 0)
  67                 return -1;
  68
  69         build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
  70                           sbuild_id);
  71         fprintf(fp, "%s\n", sbuild_id);
  72         return 0;
  73 }
  74
  75 static int filename__fprintf_build_id(const char *name, FILE *fp)
  76 {
  77         u8 build_id[BUILD_ID_SIZE];
  78         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
  79
  80         if (filename__read_build_id(name, build_id,
  81                                     sizeof(build_id)) != sizeof(build_id))
  82                 return 0;
  83
  84         build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
  85         return fprintf(fp, "%s\n", sbuild_id);
  86 }
  87
  88 static int __cmd_buildid_list(void)
  89 {
  90         if (show_kernel)
  91                 return sysfs__fprintf_build_id(stdout);
  92
  93         elf_version(EV_CURRENT);
  94         /*
  95          * See if this is an ELF file first:
  96          */
  97         if (filename__fprintf_build_id(input_name, stdout))
  98                 return 0;
  99
 100         return perf_session__list_build_ids();
 101 }
 102
 103 int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
 104 {
 105         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 106         setup_pager();
 107         return __cmd_buildid_list();
 108 }