linux/tools/perf/builtin-buildid-list.c
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   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 "util/parse-options.h"
  16#include "util/session.h"
  17#include "util/symbol.h"
  18
  19static int sysfs__fprintf_build_id(FILE *fp)
  20{
  21        u8 kallsyms_build_id[BUILD_ID_SIZE];
  22        char sbuild_id[BUILD_ID_SIZE * 2 + 1];
  23
  24        if (sysfs__read_build_id("/sys/kernel/notes", kallsyms_build_id,
  25                                 sizeof(kallsyms_build_id)) != 0)
  26                return -1;
  27
  28        build_id__sprintf(kallsyms_build_id, sizeof(kallsyms_build_id),
  29                          sbuild_id);
  30        fprintf(fp, "%s\n", sbuild_id);
  31        return 0;
  32}
  33
  34static int filename__fprintf_build_id(const char *name, FILE *fp)
  35{
  36        u8 build_id[BUILD_ID_SIZE];
  37        char sbuild_id[BUILD_ID_SIZE * 2 + 1];
  38
  39        if (filename__read_build_id(name, build_id,
  40                                    sizeof(build_id)) != sizeof(build_id))
  41                return 0;
  42
  43        build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
  44        return fprintf(fp, "%s\n", sbuild_id);
  45}
  46
  47static int perf_session__list_build_ids(const char *input_name,
  48                                        bool force, bool with_hits)
  49{
  50        struct perf_session *session;
  51
  52        symbol__elf_init();
  53
  54        session = perf_session__new(input_name, O_RDONLY, force, false,
  55                                    &build_id__mark_dso_hit_ops);
  56        if (session == NULL)
  57                return -1;
  58
  59        /*
  60         * See if this is an ELF file first:
  61         */
  62        if (filename__fprintf_build_id(session->filename, stdout))
  63                goto out;
  64
  65        /*
  66         * in pipe-mode, the only way to get the buildids is to parse
  67         * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
  68         */
  69        if (with_hits || session->fd_pipe)
  70                perf_session__process_events(session, &build_id__mark_dso_hit_ops);
  71
  72        perf_session__fprintf_dsos_buildid(session, stdout, with_hits);
  73out:
  74        perf_session__delete(session);
  75        return 0;
  76}
  77
  78int cmd_buildid_list(int argc, const char **argv,
  79                     const char *prefix __maybe_unused)
  80{
  81        bool show_kernel = false;
  82        bool with_hits = false;
  83        bool force = false;
  84        const char *input_name = NULL;
  85        const struct option options[] = {
  86        OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
  87        OPT_STRING('i', "input", &input_name, "file", "input file name"),
  88        OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
  89        OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
  90        OPT_INCR('v', "verbose", &verbose, "be more verbose"),
  91        OPT_END()
  92        };
  93        const char * const buildid_list_usage[] = {
  94                "perf buildid-list [<options>]",
  95                NULL
  96        };
  97
  98        argc = parse_options(argc, argv, options, buildid_list_usage, 0);
  99        setup_pager();
 100
 101        if (show_kernel)
 102                return sysfs__fprintf_build_id(stdout);
 103
 104        return perf_session__list_build_ids(input_name, force, with_hits);
 105}
 106
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