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 "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
  21static 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                .file      = {
  27                        .path = file_name,
  28                },
  29                .mode      = PERF_DATA_MODE_READ,
  30                .force     = details->force,
  31        };
  32        bool has_tracepoint = false;
  33
  34        session = perf_session__new(&data, 0, NULL);
  35        if (session == NULL)
  36                return -1;
  37
  38        evlist__for_each_entry(session->evlist, pos) {
  39                perf_evsel__fprintf(pos, details, stdout);
  40
  41                if (pos->attr.type == PERF_TYPE_TRACEPOINT)
  42                        has_tracepoint = true;
  43        }
  44
  45        if (has_tracepoint && !details->trace_fields)
  46                printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");
  47
  48        perf_session__delete(session);
  49        return 0;
  50}
  51
  52int cmd_evlist(int argc, const char **argv)
  53{
  54        struct perf_attr_details details = { .verbose = false, };
  55        const struct option options[] = {
  56        OPT_STRING('i', "input", &input_name, "file", "Input file name"),
  57        OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
  58        OPT_BOOLEAN('v', "verbose", &details.verbose,
  59                    "Show all event attr details"),
  60        OPT_BOOLEAN('g', "group", &details.event_group,
  61                    "Show event group information"),
  62        OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),
  63        OPT_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),
  64        OPT_END()
  65        };
  66        const char * const evlist_usage[] = {
  67                "perf evlist [<options>]",
  68                NULL
  69        };
  70
  71        argc = parse_options(argc, argv, options, evlist_usage, 0);
  72        if (argc)
  73                usage_with_options(evlist_usage, options);
  74
  75        if (details.event_group && (details.verbose || details.freq)) {
  76                usage_with_options_msg(evlist_usage, options,
  77                        "--group option is not compatible with other options\n");
  78        }
  79
  80        return __cmd_evlist(input_name, &details);
  81}
  82