LXR linux/tools/perf/builtin-evlist.c

   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 <linux/list.h>
   9
  10#include "perf.h"
  11#include "util/evlist.h"
  12#include "util/evsel.h"
  13#include "util/evsel_fprintf.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#include <linux/err.h>
  20
  21static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
  22{
  23        struct perf_session *session;
  24        struct 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 (IS_ERR(session))
  34                return PTR_ERR(session);
  35
  36        evlist__for_each_entry(session->evlist, pos) {
  37                perf_evsel__fprintf(pos, details, stdout);
  38
  39                if (pos->core.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
  50int 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