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 target target
= {
35 const char *argv
[] = { "true", NULL
};
37 signal(SIGCHLD
, sig_handler
);
38 signal(SIGUSR1
, sig_handler
);
40 evlist
= perf_evlist__new_default();
42 pr_debug("perf_evlist__new_default\n");
47 * Create maps of threads and cpus to monitor. In this case
48 * we start with all threads and cpus (-1, -1) but then in
49 * perf_evlist__prepare_workload we'll fill in the only thread
50 * we're monitoring, the one forked there.
52 evlist
->cpus
= cpu_map__dummy_new();
53 evlist
->threads
= thread_map__new_by_tid(-1);
54 if (!evlist
->cpus
|| !evlist
->threads
) {
56 pr_debug("Not enough memory to create thread/cpu maps\n");
60 err
= perf_evlist__prepare_workload(evlist
, &target
, argv
, false, true);
62 pr_debug("Couldn't run the workload!\n");
66 evsel
= perf_evlist__first(evlist
);
68 evsel
->attr
.sample_freq
= 0;
69 evsel
->attr
.inherit
= 0;
70 evsel
->attr
.watermark
= 0;
71 evsel
->attr
.wakeup_events
= 1;
72 evsel
->attr
.exclude_kernel
= 1;
74 err
= perf_evlist__open(evlist
);
76 pr_debug("Couldn't open the evlist: %s\n", strerror(-err
));
80 if (perf_evlist__mmap(evlist
, 128, true) < 0) {
81 pr_debug("failed to mmap events: %d (%s)\n", errno
,
83 goto out_close_evlist
;
86 perf_evlist__start_workload(evlist
);
89 while ((event
= perf_evlist__mmap_read(evlist
, 0)) != NULL
) {
90 if (event
->header
.type
== PERF_RECORD_EXIT
)
93 perf_evlist__mmap_consume(evlist
, 0);
96 if (!exited
|| !nr_exit
) {
97 poll(evlist
->pollfd
, evlist
->nr_fds
, -1);
102 pr_debug("received %d EXIT records\n", nr_exit
);
106 perf_evlist__munmap(evlist
);
108 perf_evlist__close(evlist
);
110 perf_evlist__delete_maps(evlist
);
111 perf_evlist__delete(evlist
);