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Linux/tools/perf/builtin-evlist.c

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  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 "util/parse-options.h"
 16 #include "util/session.h"
 17 #include "util/data.h"
 18 
 19 static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
 20 {
 21         struct perf_session *session;
 22         struct perf_evsel *pos;
 23         struct perf_data_file file = {
 24                 .path = file_name,
 25                 .mode = PERF_DATA_MODE_READ,
 26         };
 27 
 28         session = perf_session__new(&file, 0, NULL);
 29         if (session == NULL)
 30                 return -ENOMEM;
 31 
 32         evlist__for_each(session->evlist, pos)
 33                 perf_evsel__fprintf(pos, details, stdout);
 34 
 35         perf_session__delete(session);
 36         return 0;
 37 }
 38 
 39 int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
 40 {
 41         struct perf_attr_details details = { .verbose = false, };
 42         const struct option options[] = {
 43         OPT_STRING('i', "input", &input_name, "file", "Input file name"),
 44         OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
 45         OPT_BOOLEAN('v', "verbose", &details.verbose,
 46                     "Show all event attr details"),
 47         OPT_BOOLEAN('g', "group", &details.event_group,
 48                     "Show event group information"),
 49         OPT_END()
 50         };
 51         const char * const evlist_usage[] = {
 52                 "perf evlist [<options>]",
 53                 NULL
 54         };
 55 
 56         argc = parse_options(argc, argv, options, evlist_usage, 0);
 57         if (argc)
 58                 usage_with_options(evlist_usage, options);
 59 
 60         if (details.event_group && (details.verbose || details.freq)) {
 61                 pr_err("--group option is not compatible with other options\n");
 62                 usage_with_options(evlist_usage, options);
 63         }
 64 
 65         return __cmd_evlist(input_name, &details);
 66 }
 67 

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