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d723a550 NK |
1 | #include "evlist.h" |
2 | #include "evsel.h" | |
3 | #include "thread_map.h" | |
4 | #include "cpumap.h" | |
5 | #include "tests.h" | |
6 | ||
7 | #include <signal.h> | |
8 | ||
9 | static int exited; | |
10 | static int nr_exit; | |
11 | ||
12 | static void sig_handler(int sig) | |
13 | { | |
14 | exited = 1; | |
15 | ||
16 | if (sig == SIGUSR1) | |
17 | nr_exit = -1; | |
18 | } | |
19 | ||
20 | /* | |
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. | |
24 | */ | |
25 | int test__task_exit(void) | |
26 | { | |
27 | int err = -1; | |
28 | union perf_event *event; | |
29 | struct perf_evsel *evsel; | |
30 | struct perf_evlist *evlist; | |
31 | struct perf_target target = { | |
32 | .uid = UINT_MAX, | |
33 | .uses_mmap = true, | |
34 | }; | |
35 | const char *argv[] = { "true", NULL }; | |
36 | ||
37 | signal(SIGCHLD, sig_handler); | |
38 | signal(SIGUSR1, sig_handler); | |
39 | ||
b22d54b0 | 40 | evlist = perf_evlist__new_default(); |
d723a550 | 41 | if (evlist == NULL) { |
b22d54b0 | 42 | pr_debug("perf_evlist__new_default\n"); |
d723a550 NK |
43 | return -1; |
44 | } | |
d723a550 NK |
45 | |
46 | /* | |
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. | |
51 | */ | |
52 | evlist->cpus = cpu_map__dummy_new(); | |
53 | evlist->threads = thread_map__new_by_tid(-1); | |
54 | if (!evlist->cpus || !evlist->threads) { | |
55 | err = -ENOMEM; | |
56 | pr_debug("Not enough memory to create thread/cpu maps\n"); | |
57 | goto out_delete_maps; | |
58 | } | |
59 | ||
60 | err = perf_evlist__prepare_workload(evlist, &target, argv, false, true); | |
61 | if (err < 0) { | |
62 | pr_debug("Couldn't run the workload!\n"); | |
63 | goto out_delete_maps; | |
64 | } | |
65 | ||
66 | evsel = perf_evlist__first(evlist); | |
67 | evsel->attr.task = 1; | |
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; | |
73 | ||
74 | err = perf_evlist__open(evlist); | |
75 | if (err < 0) { | |
76 | pr_debug("Couldn't open the evlist: %s\n", strerror(-err)); | |
77 | goto out_delete_maps; | |
78 | } | |
79 | ||
80 | if (perf_evlist__mmap(evlist, 128, true) < 0) { | |
81 | pr_debug("failed to mmap events: %d (%s)\n", errno, | |
82 | strerror(errno)); | |
83 | goto out_close_evlist; | |
84 | } | |
85 | ||
86 | perf_evlist__start_workload(evlist); | |
87 | ||
88 | retry: | |
89 | while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { | |
8e50d384 ZZ |
90 | if (event->header.type == PERF_RECORD_EXIT) |
91 | nr_exit++; | |
d723a550 | 92 | |
8e50d384 | 93 | perf_evlist__mmap_consume(evlist, 0); |
d723a550 NK |
94 | } |
95 | ||
96 | if (!exited || !nr_exit) { | |
97 | poll(evlist->pollfd, evlist->nr_fds, -1); | |
98 | goto retry; | |
99 | } | |
100 | ||
101 | if (nr_exit != 1) { | |
102 | pr_debug("received %d EXIT records\n", nr_exit); | |
103 | err = -1; | |
104 | } | |
105 | ||
106 | perf_evlist__munmap(evlist); | |
107 | out_close_evlist: | |
108 | perf_evlist__close(evlist); | |
109 | out_delete_maps: | |
110 | perf_evlist__delete_maps(evlist); | |
d723a550 NK |
111 | perf_evlist__delete(evlist); |
112 | return err; | |
113 | } |