102 lines · c
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