LXR linux/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
  22static 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
  34static 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
  46static bool dso__skip_buildid(struct dso *dso, int with_hits)
  47{
  48        return with_hits && !dso->hit;
  49}
  50
  51static int perf_session__list_build_ids(bool force, bool with_hits)
  52{
  53        struct perf_session *session;
  54        struct perf_data data = {
  55                .file      = {
  56                        .path = input_name,
  57                },
  58                .mode      = PERF_DATA_MODE_READ,
  59                .force     = force,
  60        };
  61
  62        symbol__elf_init();
  63        /*
  64         * See if this is an ELF file first:
  65         */
  66        if (filename__fprintf_build_id(input_name, stdout) > 0)
  67                goto out;
  68
  69        session = perf_session__new(&data, false, &build_id__mark_dso_hit_ops);
  70        if (session == NULL)
  71                return -1;
  72
  73        /*
  74         * We take all buildids when the file contains AUX area tracing data
  75         * because we do not decode the trace because it would take too long.
  76         */
  77        if (!perf_data__is_pipe(&data) &&
  78            perf_header__has_feat(&session->header, HEADER_AUXTRACE))
  79                with_hits = false;
  80
  81        /*
  82         * in pipe-mode, the only way to get the buildids is to parse
  83         * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  84         */
  85        if (with_hits || perf_data__is_pipe(&data))
  86                perf_session__process_events(session);
  87
  88        perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
  89        perf_session__delete(session);
  90out:
  91        return 0;
  92}
  93
  94int cmd_buildid_list(int argc, const char **argv)
  95{
  96        bool show_kernel = false;
  97        bool with_hits = false;
  98        bool force = false;
  99        const struct option options[] = {
 100        OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
 101        OPT_STRING('i', "input", &input_name, "file", "input file name"),
 102        OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 103        OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 104        OPT_INCR('v', "verbose", &verbose, "be more verbose"),
 105        OPT_END()
 106        };
 107        const char * const buildid_list_usage[] = {
 108                "perf buildid-list [<options>]",
 109                NULL
 110        };
 111
 112        argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 113        setup_pager();
 114
 115        if (show_kernel)
 116                return !(sysfs__fprintf_build_id(stdout) > 0);
 117
 118        return perf_session__list_build_ids(force, with_hits);
 119}
 120