3 #include "thread_map.h"
12 static void sig_handler(int sig __maybe_unused)
18 * perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
19 * we asked by setting its exec_error to this handler.
21 static void workload_exec_failed_signal(int signo __maybe_unused,
22 siginfo_t *info __maybe_unused,
23 void *ucontext __maybe_unused)
30 * This test will start a workload that does nothing then it checks
31 * if the number of exit event reported by the kernel is 1 or not
32 * in order to check the kernel returns correct number of event.
34 int test__task_exit(int subtest __maybe_unused)
37 union perf_event *event;
38 struct perf_evsel *evsel;
39 struct perf_evlist *evlist;
40 struct target target = {
44 const char *argv[] = { "true", NULL };
45 char sbuf[STRERR_BUFSIZE];
47 struct thread_map *threads;
49 signal(SIGCHLD, sig_handler);
51 evlist = perf_evlist__new_default();
53 pr_debug("perf_evlist__new_default\n");
58 * Create maps of threads and cpus to monitor. In this case
59 * we start with all threads and cpus (-1, -1) but then in
60 * perf_evlist__prepare_workload we'll fill in the only thread
61 * we're monitoring, the one forked there.
63 cpus = cpu_map__dummy_new();
64 threads = thread_map__new_by_tid(-1);
65 if (!cpus || !threads) {
67 pr_debug("Not enough memory to create thread/cpu maps\n");
71 perf_evlist__set_maps(evlist, cpus, threads);
76 err = perf_evlist__prepare_workload(evlist, &target, argv, false,
77 workload_exec_failed_signal);
79 pr_debug("Couldn't run the workload!\n");
80 goto out_delete_evlist;
83 evsel = perf_evlist__first(evlist);
85 evsel->attr.sample_freq = 0;
86 evsel->attr.inherit = 0;
87 evsel->attr.watermark = 0;
88 evsel->attr.wakeup_events = 1;
89 evsel->attr.exclude_kernel = 1;
91 err = perf_evlist__open(evlist);
93 pr_debug("Couldn't open the evlist: %s\n",
94 str_error_r(-err, sbuf, sizeof(sbuf)));
95 goto out_delete_evlist;
98 if (perf_evlist__mmap(evlist, 128, true) < 0) {
99 pr_debug("failed to mmap events: %d (%s)\n", errno,
100 str_error_r(errno, sbuf, sizeof(sbuf)));
101 goto out_delete_evlist;
104 perf_evlist__start_workload(evlist);
107 while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
108 if (event->header.type == PERF_RECORD_EXIT)
111 perf_evlist__mmap_consume(evlist, 0);
114 if (!exited || !nr_exit) {
115 perf_evlist__poll(evlist, -1);
120 pr_debug("received %d EXIT records\n", nr_exit);
126 thread_map__put(threads);
128 perf_evlist__delete(evlist);