LXR linux/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
  20static 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
  32static 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
  44static bool dso__skip_buildid(struct dso *dso, int with_hits)
  45{
  46        return with_hits && !dso->hit;
  47}
  48
  49static 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);
  86out:
  87        return 0;
  88}
  89
  90int 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}
 117