tools/perf/builtin-evlist.c

   1 /*
   2  * Builtin evlist command: Show the list of event selectors present
   3  * in a perf.data file.
   4  */
   5 #include "builtin.h"
   6
   7 #include "util/util.h"
   8
   9 #include <linux/list.h>
  10
  11 #include "perf.h"
  12 #include "util/evlist.h"
  13 #include "util/evsel.h"
  14 #include "util/parse-events.h"
  15 #include <subcmd/parse-options.h>
  16 #include "util/session.h"
  17 #include "util/data.h"
  18 #include "util/debug.h"
  19
  20 static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
  21 {
  22         struct perf_session *session;
  23         struct perf_evsel *pos;
  24         struct perf_data_file file = {
  25                 .path = file_name,
  26                 .mode = PERF_DATA_MODE_READ,
  27                 .force = details->force,
  28         };
  29         bool has_tracepoint = false;
  30
  31         session = perf_session__new(&file, 0, NULL);
  32         if (session == NULL)
  33                 return -1;
  34
  35         evlist__for_each_entry(session->evlist, pos) {
  36                 perf_evsel__fprintf(pos, details, stdout);
  37
  38                 if (pos->attr.type == PERF_TYPE_TRACEPOINT)
  39                         has_tracepoint = true;
  40         }
  41
  42         if (has_tracepoint && !details->trace_fields)
  43                 printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");
  44
  45         perf_session__delete(session);
  46         return 0;
  47 }
  48
  49 int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
  50 {
  51         struct perf_attr_details details = { .verbose = false, };
  52         const struct option options[] = {
  53         OPT_STRING('i', "input", &input_name, "file", "Input file name"),
  54         OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
  55         OPT_BOOLEAN('v', "verbose", &details.verbose,
  56                     "Show all event attr details"),
  57         OPT_BOOLEAN('g', "group", &details.event_group,
  58                     "Show event group information"),
  59         OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),
  60         OPT_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),
  61         OPT_END()
  62         };
  63         const char * const evlist_usage[] = {
  64                 "perf evlist [<options>]",
  65                 NULL
  66         };
  67
  68         argc = parse_options(argc, argv, options, evlist_usage, 0);
  69         if (argc)
  70                 usage_with_options(evlist_usage, options);
  71
  72         if (details.event_group && (details.verbose || details.freq)) {
  73                 usage_with_options_msg(evlist_usage, options,
  74                         "--group option is not compatible with other options\n");
  75         }
  76
  77         return __cmd_evlist(input_name, &details);
  78 }