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 <subcmd/parse-options.h>
  16 #include "util/session.h"
  17 #include "util/symbol.h"
  18 #include "util/data.h"
  19 #include <errno.h>
  20
  21 static int sysfs__fprintf_build_id(FILE *fp)
  22 {
  23         char sbuild_id[SBUILD_ID_SIZE];
  24         int ret;
  25
  26         ret = sysfs__sprintf_build_id("/", sbuild_id);
  27         if (ret != sizeof(sbuild_id))
  28                 return ret < 0 ? ret : -EINVAL;
  29
  30         return fprintf(fp, "%s\n", sbuild_id);
  31 }
  32
  33 static int filename__fprintf_build_id(const char *name, FILE *fp)
  34 {
  35         char sbuild_id[SBUILD_ID_SIZE];
  36         int ret;
  37
  38         ret = filename__sprintf_build_id(name, sbuild_id);
  39         if (ret != sizeof(sbuild_id))
  40                 return ret < 0 ? ret : -EINVAL;
  41
  42         return fprintf(fp, "%s\n", sbuild_id);
  43 }
  44
  45 static bool dso__skip_buildid(struct dso *dso, int with_hits)
  46 {
  47         return with_hits && !dso->hit;
  48 }
  49
  50 static int perf_session__list_build_ids(bool force, bool with_hits)
  51 {
  52         struct perf_session *session;
  53         struct perf_data_file file = {
  54                 .path  = input_name,
  55                 .mode  = PERF_DATA_MODE_READ,
  56                 .force = force,
  57         };
  58
  59         symbol__elf_init();
  60         /*
  61          * See if this is an ELF file first:
  62          */
  63         if (filename__fprintf_build_id(input_name, stdout) > 0)
  64                 goto out;
  65
  66         session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
  67         if (session == NULL)
  68                 return -1;
  69
  70         /*
  71          * We take all buildids when the file contains AUX area tracing data
  72          * because we do not decode the trace because it would take too long.
  73          */
  74         if (!perf_data_file__is_pipe(&file) &&
  75             perf_header__has_feat(&session->header, HEADER_AUXTRACE))
  76                 with_hits = false;
  77
  78         /*
  79          * in pipe-mode, the only way to get the buildids is to parse
  80          * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  81          */
  82         if (with_hits || perf_data_file__is_pipe(&file))
  83                 perf_session__process_events(session);
  84
  85         perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
  86         perf_session__delete(session);
  87 out:
  88         return 0;
  89 }
  90
  91 int cmd_buildid_list(int argc, const char **argv)
  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 }