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
__cmd_evlist(const char * file_name,struct perf_attr_details * details)21 static 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
cmd_evlist(int argc,const char ** argv)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