tools/perf/builtin-buildid-list.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * builtin-buildid-list.c
   4  *
   5  * Builtin buildid-list command: list buildids in perf.data, in the running
   6  * kernel and in ELF files.
   7  *
   8  * Copyright (C) 2009, Red Hat Inc.
   9  * Copyright (C) 2009, Arnaldo Carvalho de Melo <acme@redhat.com>
  10  */
  11 #include "builtin.h"
  12 #include "perf.h"
  13 #include "util/build-id.h"
  14 #include "util/cache.h"
  15 #include "util/debug.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
  22 static int sysfs__fprintf_build_id(FILE *fp)
  23 {
  24         char sbuild_id[SBUILD_ID_SIZE];
  25         int ret;
  26
  27         ret = sysfs__sprintf_build_id("/", sbuild_id);
  28         if (ret != sizeof(sbuild_id))
  29                 return ret < 0 ? ret : -EINVAL;
  30
  31         return fprintf(fp, "%s\n", sbuild_id);
  32 }
  33
  34 static int filename__fprintf_build_id(const char *name, FILE *fp)
  35 {
  36         char sbuild_id[SBUILD_ID_SIZE];
  37         int ret;
  38
  39         ret = filename__sprintf_build_id(name, sbuild_id);
  40         if (ret != sizeof(sbuild_id))
  41                 return ret < 0 ? ret : -EINVAL;
  42
  43         return fprintf(fp, "%s\n", sbuild_id);
  44 }
  45
  46 static bool dso__skip_buildid(struct dso *dso, int with_hits)
  47 {
  48         return with_hits && !dso->hit;
  49 }
  50
  51 static int perf_session__list_build_ids(bool force, bool with_hits)
  52 {
  53         struct perf_session *session;
  54         struct perf_data_file file = {
  55                 .path  = input_name,
  56                 .mode  = PERF_DATA_MODE_READ,
  57                 .force = force,
  58         };
  59
  60         symbol__elf_init();
  61         /*
  62          * See if this is an ELF file first:
  63          */
  64         if (filename__fprintf_build_id(input_name, stdout) > 0)
  65                 goto out;
  66
  67         session = perf_session__new(&file, false, &build_id__mark_dso_hit_ops);
  68         if (session == NULL)
  69                 return -1;
  70
  71         /*
  72          * We take all buildids when the file contains AUX area tracing data
  73          * because we do not decode the trace because it would take too long.
  74          */
  75         if (!perf_data_file__is_pipe(&file) &&
  76             perf_header__has_feat(&session->header, HEADER_AUXTRACE))
  77                 with_hits = false;
  78
  79         /*
  80          * in pipe-mode, the only way to get the buildids is to parse
  81          * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  82          */
  83         if (with_hits || perf_data_file__is_pipe(&file))
  84                 perf_session__process_events(session);
  85
  86         perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
  87         perf_session__delete(session);
  88 out:
  89         return 0;
  90 }
  91
  92 int cmd_buildid_list(int argc, const char **argv)
  93 {
  94         bool show_kernel = false;
  95         bool with_hits = false;
  96         bool force = false;
  97         const struct option options[] = {
  98         OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
  99         OPT_STRING('i', "input", &input_name, "file", "input file name"),
 100         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 101         OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 102         OPT_INCR('v', "verbose", &verbose, "be more verbose"),
 103         OPT_END()
 104         };
 105         const char * const buildid_list_usage[] = {
 106                 "perf buildid-list [<options>]",
 107                 NULL
 108         };
 109
 110         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 111         setup_pager();
 112
 113         if (show_kernel)
 114                 return !(sysfs__fprintf_build_id(stdout) > 0);
 115
 116         return perf_session__list_build_ids(force, with_hits);
 117 }