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Linux/tools/perf/builtin-evlist.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 /*
  3  * Builtin evlist command: Show the list of event selectors present
  4  * in a perf.data file.
  5  */
  6 #include "builtin.h"
  7 
  8 #include "util/util.h"
  9 
 10 #include <linux/list.h>
 11 
 12 #include "perf.h"
 13 #include "util/evlist.h"
 14 #include "util/evsel.h"
 15 #include "util/parse-events.h"
 16 #include <subcmd/parse-options.h>
 17 #include "util/session.h"
 18 #include "util/data.h"
 19 #include "util/debug.h"
 20 
 21 static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
 22 {
 23         struct perf_session *session;
 24         struct perf_evsel *pos;
 25         struct perf_data data = {
 26                 .path      = file_name,
 27                 .mode      = PERF_DATA_MODE_READ,
 28                 .force     = details->force,
 29         };
 30         bool has_tracepoint = false;
 31 
 32         session = perf_session__new(&data, 0, NULL);
 33         if (session == NULL)
 34                 return -1;
 35 
 36         evlist__for_each_entry(session->evlist, pos) {
 37                 perf_evsel__fprintf(pos, details, stdout);
 38 
 39                 if (pos->attr.type == PERF_TYPE_TRACEPOINT)
 40                         has_tracepoint = true;
 41         }
 42 
 43         if (has_tracepoint && !details->trace_fields)
 44                 printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");
 45 
 46         perf_session__delete(session);
 47         return 0;
 48 }
 49 
 50 int cmd_evlist(int argc, const char **argv)
 51 {
 52         struct perf_attr_details details = { .verbose = false, };
 53         const struct option options[] = {
 54         OPT_STRING('i', "input", &input_name, "file", "Input file name"),
 55         OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
 56         OPT_BOOLEAN('v', "verbose", &details.verbose,
 57                     "Show all event attr details"),
 58         OPT_BOOLEAN('g', "group", &details.event_group,
 59                     "Show event group information"),
 60         OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),
 61         OPT_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),
 62         OPT_END()
 63         };
 64         const char * const evlist_usage[] = {
 65                 "perf evlist [<options>]",
 66                 NULL
 67         };
 68 
 69         argc = parse_options(argc, argv, options, evlist_usage, 0);
 70         if (argc)
 71                 usage_with_options(evlist_usage, options);
 72 
 73         if (details.event_group && (details.verbose || details.freq)) {
 74                 usage_with_options_msg(evlist_usage, options,
 75                         "--group option is not compatible with other options\n");
 76         }
 77 
 78         return __cmd_evlist(input_name, &details);
 79 }
 80 

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