3 #include "thread_map.h"
12 static void sig_handler(int sig)
21 * This test will start a workload that does nothing then it checks
22 * if the number of exit event reported by the kernel is 1 or not
23 * in order to check the kernel returns correct number of event.
25 int test__task_exit(void)
28 union perf_event *event;
29 struct perf_evsel *evsel;
30 struct perf_evlist *evlist;
31 struct perf_target target = {
35 const char *argv[] = { "true", NULL };
37 signal(SIGCHLD, sig_handler);
38 signal(SIGUSR1, sig_handler);
40 evlist = perf_evlist__new();
42 pr_debug("perf_evlist__new\n");
46 * We need at least one evsel in the evlist, use the default
49 err = perf_evlist__add_default(evlist);
51 pr_debug("Not enough memory to create evsel\n");
56 * Create maps of threads and cpus to monitor. In this case
57 * we start with all threads and cpus (-1, -1) but then in
58 * perf_evlist__prepare_workload we'll fill in the only thread
59 * we're monitoring, the one forked there.
61 evlist->cpus = cpu_map__dummy_new();
62 evlist->threads = thread_map__new_by_tid(-1);
63 if (!evlist->cpus || !evlist->threads) {
65 pr_debug("Not enough memory to create thread/cpu maps\n");
69 err = perf_evlist__prepare_workload(evlist, &target, argv, false, true);
71 pr_debug("Couldn't run the workload!\n");
75 evsel = perf_evlist__first(evlist);
77 evsel->attr.sample_freq = 0;
78 evsel->attr.inherit = 0;
79 evsel->attr.watermark = 0;
80 evsel->attr.wakeup_events = 1;
81 evsel->attr.exclude_kernel = 1;
83 err = perf_evlist__open(evlist);
85 pr_debug("Couldn't open the evlist: %s\n", strerror(-err));
89 if (perf_evlist__mmap(evlist, 128, true) < 0) {
90 pr_debug("failed to mmap events: %d (%s)\n", errno,
92 goto out_close_evlist;
95 perf_evlist__start_workload(evlist);
98 while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
99 if (event->header.type == PERF_RECORD_EXIT)
102 perf_evlist__mmap_consume(evlist, 0);
105 if (!exited || !nr_exit) {
106 poll(evlist->pollfd, evlist->nr_fds, -1);
111 pr_debug("received %d EXIT records\n", nr_exit);
115 perf_evlist__munmap(evlist);
117 perf_evlist__close(evlist);
119 perf_evlist__delete_maps(evlist);
121 perf_evlist__delete(evlist);