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 static const char *input_name;
  20 static bool force;
  21 static bool show_kernel;
  22 static bool with_hits;
  23
  24 static const char * const buildid_list_usage[] = {
  25         "perf buildid-list [<options>]",
  26         NULL
  27 };
  28
  29 static const struct option options[] = {
  30         OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
  31         OPT_STRING('i', "input", &input_name, "file",
  32                     "input file name"),
  33         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
  34         OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
  35         OPT_INCR('v', "verbose", &verbose,
  36                     "be more verbose"),
  37         OPT_END()
  38 };
  39
  40 static int sysfs__fprintf_build_id(FILE *fp)
  41 {
  42         u8 kallsyms_build_id[BUILD_ID_SIZE];
  43         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
  44
  45         if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
  46                                  sizeof(kallsyms_build_id)) != 0)
  47                 return -1;
  48
  49         build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
  50                           sbuild_id);
  51         fprintf(fp, "%s\n", sbuild_id);
  52         return 0;
  53 }
  54
  55 static int filename__fprintf_build_id(const char *name, FILE *fp)
  56 {
  57         u8 build_id[BUILD_ID_SIZE];
  58         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
  59
  60         if (filename__read_build_id(name, build_id,
  61                                     sizeof(build_id)) != sizeof(build_id))
  62                 return 0;
  63
  64         build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
  65         return fprintf(fp, "%s\n", sbuild_id);
  66 }
  67
  68 static int perf_session__list_build_ids(void)
  69 {
  70         struct perf_session *session;
  71
  72         symbol__elf_init();
  73
  74         session = perf_session__new(input_name, O_RDONLY, force, false,
  75                                     &build_id__mark_dso_hit_ops);
  76         if (session == NULL)
  77                 return -1;
  78
  79         /*
  80          * See if this is an ELF file first:
  81          */
  82         if (filename__fprintf_build_id(session->filename, stdout))
  83                 goto out;
  84
  85         /*
  86          * in pipe-mode, the only way to get the buildids is to parse
  87          * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  88          */
  89         if (with_hits || session->fd_pipe)
  90                 perf_session__process_events(session, &build_id__mark_dso_hit_ops);
  91
  92         perf_session__fprintf_dsos_buildid(session, stdout, with_hits);
  93 out:
  94         perf_session__delete(session);
  95         return 0;
  96 }
  97
  98 static int __cmd_buildid_list(void)
  99 {
 100         if (show_kernel)
 101                 return sysfs__fprintf_build_id(stdout);
 102
 103         return perf_session__list_build_ids();
 104 }
 105
 106 int cmd_buildid_list(int argc, const char **argv,
 107                      const char *prefix __maybe_unused)
 108 {
 109         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 110         setup_pager();
 111         return __cmd_buildid_list();
 112 }