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 "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 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 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, &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 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