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/debug.h"
  14 #include "util/dso.h"
  15 #include <subcmd/pager.h>
  16 #include <subcmd/parse-options.h>
  17 #include "util/session.h"
  18 #include "util/symbol.h"
  19 #include "util/data.h"
  20 #include <errno.h>
  21 #include <linux/err.h>
  22
  23 static int sysfs__fprintf_build_id(FILE *fp)
  24 {
  25         char sbuild_id[SBUILD_ID_SIZE];
  26         int ret;
  27
  28         ret = sysfs__sprintf_build_id("/", sbuild_id);
  29         if (ret != sizeof(sbuild_id))
  30                 return ret < 0 ? ret : -EINVAL;
  31
  32         return fprintf(fp, "%s\n", sbuild_id);
  33 }
  34
  35 static int filename__fprintf_build_id(const char *name, FILE *fp)
  36 {
  37         char sbuild_id[SBUILD_ID_SIZE];
  38         int ret;
  39
  40         ret = filename__sprintf_build_id(name, sbuild_id);
  41         if (ret != sizeof(sbuild_id))
  42                 return ret < 0 ? ret : -EINVAL;
  43
  44         return fprintf(fp, "%s\n", sbuild_id);
  45 }
  46
  47 static bool dso__skip_buildid(struct dso *dso, int with_hits)
  48 {
  49         return with_hits && !dso->hit;
  50 }
  51
  52 static int perf_session__list_build_ids(bool force, bool with_hits)
  53 {
  54         struct perf_session *session;
  55         struct perf_data data = {
  56                 .path  = input_name,
  57                 .mode  = PERF_DATA_MODE_READ,
  58                 .force = force,
  59         };
  60
  61         symbol__elf_init();
  62         /*
  63          * See if this is an ELF file first:
  64          */
  65         if (filename__fprintf_build_id(input_name, stdout) > 0)
  66                 goto out;
  67
  68         session = perf_session__new(&data, false, &build_id__mark_dso_hit_ops);
  69         if (IS_ERR(session))
  70                 return PTR_ERR(session);
  71
  72         /*
  73          * We take all buildids when the file contains AUX area tracing data
  74          * because we do not decode the trace because it would take too long.
  75          */
  76         if (!perf_data__is_pipe(&data) &&
  77             perf_header__has_feat(&session->header, HEADER_AUXTRACE))
  78                 with_hits = false;
  79
  80         if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
  81                 with_hits = true;
  82
  83         if (zstd_init(&(session->zstd_data), 0) < 0)
  84                 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
  85
  86         /*
  87          * in pipe-mode, the only way to get the buildids is to parse
  88          * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  89          */
  90         if (with_hits || perf_data__is_pipe(&data))
  91                 perf_session__process_events(session);
  92
  93         perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
  94         perf_session__delete(session);
  95 out:
  96         return 0;
  97 }
  98
  99 int cmd_buildid_list(int argc, const char **argv)
 100 {
 101         bool show_kernel = false;
 102         bool with_hits = false;
 103         bool force = false;
 104         const struct option options[] = {
 105         OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
 106         OPT_STRING('i', "input", &input_name, "file", "input file name"),
 107         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 108         OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 109         OPT_INCR('v', "verbose", &verbose, "be more verbose"),
 110         OPT_END()
 111         };
 112         const char * const buildid_list_usage[] = {
 113                 "perf buildid-list [<options>]",
 114                 NULL
 115         };
 116
 117         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 118         setup_pager();
 119
 120         if (show_kernel)
 121                 return !(sysfs__fprintf_build_id(stdout) > 0);
 122
 123         return perf_session__list_build_ids(force, with_hits);
 124 }