kernel/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 #include "util/data.h"
  19
  20 static int sysfs__fprintf_build_id(FILE *fp)
  21 {
  22         char sbuild_id[SBUILD_ID_SIZE];
  23         int ret;
  24
  25         ret = sysfs__sprintf_build_id("/", sbuild_id);
  26         if (ret != sizeof(sbuild_id))
  27                 return ret < 0 ? ret : -EINVAL;
  28
  29         return fprintf(fp, "%s\n", sbuild_id);
  30 }
  31
  32 static int filename__fprintf_build_id(const char *name, FILE *fp)
  33 {
  34         char sbuild_id[SBUILD_ID_SIZE];
  35         int ret;
  36
  37         ret = filename__sprintf_build_id(name, sbuild_id);
  38         if (ret != sizeof(sbuild_id))
  39                 return ret < 0 ? ret : -EINVAL;
  40
  41         return fprintf(fp, "%s\n", sbuild_id);
  42 }
  43
  44 static bool dso__skip_buildid(struct dso *dso, int with_hits)
  45 {
  46         return with_hits && !dso->hit;
  47 }
  48
  49 static int perf_session__list_build_ids(bool force, bool with_hits)
  50 {
  51         struct perf_session *session;
  52         struct perf_data_file file = {
  53                 .path  = input_name,
  54                 .mode  = PERF_DATA_MODE_READ,
  55                 .force = force,
  56         };
  57
  58         symbol__elf_init();
  59         /*
  60          * See if this is an ELF file first:
  61          */
  62         if (filename__fprintf_build_id(input_name, stdout) > 0)
  63                 goto out;
  64
  65         session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
  66         if (session == NULL)
  67                 return -1;
  68
  69         /*
  70          * We take all buildids when the file contains AUX area tracing data
  71          * because we do not decode the trace because it would take too long.
  72          */
  73         if (!perf_data_file__is_pipe(&file) &&
  74             perf_header__has_feat(&session->header, HEADER_AUXTRACE))
  75                 with_hits = false;
  76
  77         /*
  78          * in pipe-mode, the only way to get the buildids is to parse
  79          * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  80          */
  81         if (with_hits || perf_data_file__is_pipe(&file))
  82                 perf_session__process_events(session);
  83
  84         perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
  85         perf_session__delete(session);
  86 out:
  87         return 0;
  88 }
  89
  90 int cmd_buildid_list(int argc, const char **argv,
  91                      const char *prefix __maybe_unused)
  92 {
  93         bool show_kernel = false;
  94         bool with_hits = false;
  95         bool force = false;
  96         const struct option options[] = {
  97         OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
  98         OPT_STRING('i', "input", &input_name, "file", "input file name"),
  99         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 100         OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 101         OPT_INCR('v', "verbose", &verbose, "be more verbose"),
 102         OPT_END()
 103         };
 104         const char * const buildid_list_usage[] = {
 105                 "perf buildid-list [<options>]",
 106                 NULL
 107         };
 108
 109         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 110         setup_pager();
 111
 112         if (show_kernel)
 113                 return !(sysfs__fprintf_build_id(stdout) > 0);
 114
 115         return perf_session__list_build_ids(force, with_hits);
 116 }