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 #include "util/tool.h"
21
process_header_feature(struct perf_session * session __maybe_unused,union perf_event * event __maybe_unused)22 static int process_header_feature(struct perf_session *session __maybe_unused,
23 union perf_event *event __maybe_unused)
24 {
25 session_done = 1;
26 return 0;
27 }
28
__cmd_evlist(const char * file_name,struct perf_attr_details * details)29 static int __cmd_evlist(const char *file_name, struct perf_attr_details *details)
30 {
31 struct perf_session *session;
32 struct evsel *pos;
33 struct perf_data data = {
34 .path = file_name,
35 .mode = PERF_DATA_MODE_READ,
36 .force = details->force,
37 };
38 struct perf_tool tool = {
39 /* only needed for pipe mode */
40 .attr = perf_event__process_attr,
41 .feature = process_header_feature,
42 };
43 bool has_tracepoint = false;
44
45 session = perf_session__new(&data, 0, &tool);
46 if (IS_ERR(session))
47 return PTR_ERR(session);
48
49 if (data.is_pipe)
50 perf_session__process_events(session);
51
52 evlist__for_each_entry(session->evlist, pos) {
53 evsel__fprintf(pos, details, stdout);
54
55 if (pos->core.attr.type == PERF_TYPE_TRACEPOINT)
56 has_tracepoint = true;
57 }
58
59 if (has_tracepoint && !details->trace_fields)
60 printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");
61
62 perf_session__delete(session);
63 return 0;
64 }
65
cmd_evlist(int argc,const char ** argv)66 int cmd_evlist(int argc, const char **argv)
67 {
68 struct perf_attr_details details = { .verbose = false, };
69 const struct option options[] = {
70 OPT_STRING('i', "input", &input_name, "file", "Input file name"),
71 OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),
72 OPT_BOOLEAN('v', "verbose", &details.verbose,
73 "Show all event attr details"),
74 OPT_BOOLEAN('g', "group", &details.event_group,
75 "Show event group information"),
76 OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),
77 OPT_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),
78 OPT_END()
79 };
80 const char * const evlist_usage[] = {
81 "perf evlist [<options>]",
82 NULL
83 };
84
85 argc = parse_options(argc, argv, options, evlist_usage, 0);
86 if (argc)
87 usage_with_options(evlist_usage, options);
88
89 if (details.event_group && (details.verbose || details.freq)) {
90 usage_with_options_msg(evlist_usage, options,
91 "--group option is not compatible with other options\n");
92 }
93
94 return __cmd_evlist(input_name, &details);
95 }
96