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1// SPDX-License-Identifier: GPL-2.02/*3 * Builtin evlist command: Show the list of event selectors present4 * in a perf.data file.5 */6#include "builtin.h"7 8#include <linux/list.h>9 10#include "util/evlist.h"11#include "util/evsel.h"12#include "util/evsel_fprintf.h"13#include "util/parse-events.h"14#include <subcmd/parse-options.h>15#include "util/session.h"16#include "util/data.h"17#include "util/debug.h"18#include <linux/err.h>19#include "util/tool.h"20#include "util/util.h"21 22static 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 29static 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	bool has_tracepoint = false, has_group = false;40 41	perf_tool__init(&tool, /*ordered_events=*/false);42	/* only needed for pipe mode */43	tool.attr = perf_event__process_attr;44	tool.feature = process_header_feature;45	session = perf_session__new(&data, &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		if (!evsel__is_group_leader(pos))59			has_group = true;60	}61 62	if (has_tracepoint && !details->trace_fields)63		printf("# Tip: use 'perf evlist --trace-fields' to show fields for tracepoint events\n");64 65	if (has_group && !details->event_group)66		printf("# Tip: use 'perf evlist -g' to show group information\n");67 68	perf_session__delete(session);69	return 0;70}71 72int cmd_evlist(int argc, const char **argv)73{74	struct perf_attr_details details = { .verbose = false, };75	const struct option options[] = {76	OPT_STRING('i', "input", &input_name, "file", "Input file name"),77	OPT_BOOLEAN('F', "freq", &details.freq, "Show the sample frequency"),78	OPT_BOOLEAN('v', "verbose", &details.verbose,79		    "Show all event attr details"),80	OPT_BOOLEAN('g', "group", &details.event_group,81		    "Show event group information"),82	OPT_BOOLEAN('f', "force", &details.force, "don't complain, do it"),83	OPT_BOOLEAN(0, "trace-fields", &details.trace_fields, "Show tracepoint fields"),84	OPT_END()85	};86	const char * const evlist_usage[] = {87		"perf evlist [<options>]",88		NULL89	};90 91	argc = parse_options(argc, argv, options, evlist_usage, 0);92	if (argc)93		usage_with_options(evlist_usage, options);94 95	if (details.event_group && (details.verbose || details.freq)) {96		usage_with_options_msg(evlist_usage, options,97			"--group option is not compatible with other options\n");98	}99 100	return __cmd_evlist(input_name, &details);101}102