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/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
  23static 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
  35static 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
  47static bool dso__skip_buildid(struct dso *dso, int with_hits)
  48{
  49        return with_hits && !dso->hit;
  50}
  51
  52static 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        /*
  81         * in pipe-mode, the only way to get the buildids is to parse
  82         * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  83         */
  84        if (with_hits || perf_data__is_pipe(&data))
  85                perf_session__process_events(session);
  86
  87        perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
  88        perf_session__delete(session);
  89out:
  90        return 0;
  91}
  92
  93int cmd_buildid_list(int argc, const char **argv)
  94{
  95        bool show_kernel = false;
  96        bool with_hits = false;
  97        bool force = false;
  98        const struct option options[] = {
  99        OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
 100        OPT_STRING('i', "input", &input_name, "file", "input file name"),
 101        OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 102        OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 103        OPT_INCR('v', "verbose", &verbose, "be more verbose"),
 104        OPT_END()
 105        };
 106        const char * const buildid_list_usage[] = {
 107                "perf buildid-list [<options>]",
 108                NULL
 109        };
 110
 111        argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 112        setup_pager();
 113
 114        if (show_kernel)
 115                return !(sysfs__fprintf_build_id(stdout) > 0);
 116
 117        return perf_session__list_build_ids(force, with_hits);
 118}
 119