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