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 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 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 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