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 "util/build-id.h"
  12 #include "util/debug.h"
  13 #include "util/dso.h"
  14 #include "util/map.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 "util/util.h"
  21 #include <errno.h>
  22 #include <inttypes.h>
  23 #include <linux/err.h>
  24
  25 static int buildid__map_cb(struct map *map, void *arg __maybe_unused)
  26 {
  27         const struct dso *dso = map__dso(map);
  28         char bid_buf[SBUILD_ID_SIZE];
  29
  30         memset(bid_buf, 0, sizeof(bid_buf));
  31         if (dso->has_build_id)
  32                 build_id__sprintf(&dso->bid, bid_buf);
  33         printf("%s %16" PRIx64 " %16" PRIx64, bid_buf, map__start(map), map__end(map));
  34         if (dso->long_name != NULL) {
  35                 printf(" %s", dso->long_name);
  36         } else if (dso->short_name != NULL) {
  37                 printf(" %s", dso->short_name);
  38         }
  39         printf("\n");
  40
  41         return 0;
  42 }
  43
  44 static void buildid__show_kernel_maps(void)
  45 {
  46         struct machine *machine;
  47
  48         machine = machine__new_host();
  49         machine__for_each_kernel_map(machine, buildid__map_cb, NULL);
  50         machine__delete(machine);
  51 }
  52
  53 static int sysfs__fprintf_build_id(FILE *fp)
  54 {
  55         char sbuild_id[SBUILD_ID_SIZE];
  56         int ret;
  57
  58         ret = sysfs__sprintf_build_id("/", sbuild_id);
  59         if (ret != sizeof(sbuild_id))
  60                 return ret < 0 ? ret : -EINVAL;
  61
  62         return fprintf(fp, "%s\n", sbuild_id);
  63 }
  64
  65 static int filename__fprintf_build_id(const char *name, FILE *fp)
  66 {
  67         char sbuild_id[SBUILD_ID_SIZE];
  68         int ret;
  69
  70         ret = filename__sprintf_build_id(name, sbuild_id);
  71         if (ret != sizeof(sbuild_id))
  72                 return ret < 0 ? ret : -EINVAL;
  73
  74         return fprintf(fp, "%s\n", sbuild_id);
  75 }
  76
  77 static bool dso__skip_buildid(struct dso *dso, int with_hits)
  78 {
  79         return with_hits && !dso->hit;
  80 }
  81
  82 static int perf_session__list_build_ids(bool force, bool with_hits)
  83 {
  84         struct perf_session *session;
  85         struct perf_data data = {
  86                 .path  = input_name,
  87                 .mode  = PERF_DATA_MODE_READ,
  88                 .force = force,
  89         };
  90
  91         symbol__elf_init();
  92         /*
  93          * See if this is an ELF file first:
  94          */
  95         if (filename__fprintf_build_id(input_name, stdout) > 0)
  96                 goto out;
  97
  98         session = perf_session__new(&data, &build_id__mark_dso_hit_ops);
  99         if (IS_ERR(session))
 100                 return PTR_ERR(session);
 101
 102         /*
 103          * We take all buildids when the file contains AUX area tracing data
 104          * because we do not decode the trace because it would take too long.
 105          */
 106         if (!perf_data__is_pipe(&data) &&
 107             perf_header__has_feat(&session->header, HEADER_AUXTRACE))
 108                 with_hits = false;
 109
 110         if (!perf_header__has_feat(&session->header, HEADER_BUILD_ID))
 111                 with_hits = true;
 112
 113         if (zstd_init(&(session->zstd_data), 0) < 0)
 114                 pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
 115
 116         /*
 117          * in pipe-mode, the only way to get the buildids is to parse
 118          * the record stream. Buildids are stored as RECORD_HEADER_BUILD_ID
 119          */
 120         if (with_hits || perf_data__is_pipe(&data))
 121                 perf_session__process_events(session);
 122
 123         perf_session__fprintf_dsos_buildid(session, stdout, dso__skip_buildid, with_hits);
 124         perf_session__delete(session);
 125 out:
 126         return 0;
 127 }
 128
 129 int cmd_buildid_list(int argc, const char **argv)
 130 {
 131         bool show_kernel = false;
 132         bool show_kernel_maps = false;
 133         bool with_hits = false;
 134         bool force = false;
 135         const struct option options[] = {
 136         OPT_BOOLEAN('H', "with-hits", &with_hits, "Show only DSOs with hits"),
 137         OPT_STRING('i', "input", &input_name, "file", "input file name"),
 138         OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
 139         OPT_BOOLEAN('k', "kernel", &show_kernel, "Show current kernel build id"),
 140         OPT_BOOLEAN('m', "kernel-maps", &show_kernel_maps,
 141             "Show build id of current kernel + modules"),
 142         OPT_INCR('v', "verbose", &verbose, "be more verbose"),
 143         OPT_END()
 144         };
 145         const char * const buildid_list_usage[] = {
 146                 "perf buildid-list [<options>]",
 147                 NULL
 148         };
 149
 150         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
 151         setup_pager();
 152
 153         if (show_kernel) {
 154                 return !(sysfs__fprintf_build_id(stdout) > 0);
 155         } else if (show_kernel_maps) {
 156                 buildid__show_kernel_maps();
 157                 return 0;
 158         }
 159
 160         return perf_session__list_build_ids(force, with_hits);
 161 }