tjh.dev
Linux kernel mirror (for testing)
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linux
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}