Commit | Line | Data |
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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 | ||
735f7e0b | 12 | static void sig_handler(int sig __maybe_unused) |
d723a550 NK |
13 | { |
14 | exited = 1; | |
735f7e0b | 15 | } |
d723a550 | 16 | |
735f7e0b ACM |
17 | /* |
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. | |
20 | */ | |
21 | static void workload_exec_failed_signal(int signo __maybe_unused, | |
22 | siginfo_t *info __maybe_unused, | |
23 | void *ucontext __maybe_unused) | |
24 | { | |
25 | exited = 1; | |
26 | nr_exit = -1; | |
d723a550 NK |
27 | } |
28 | ||
29 | /* | |
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. | |
33 | */ | |
34 | int test__task_exit(void) | |
35 | { | |
36 | int err = -1; | |
37 | union perf_event *event; | |
38 | struct perf_evsel *evsel; | |
39 | struct perf_evlist *evlist; | |
602ad878 | 40 | struct target target = { |
d723a550 NK |
41 | .uid = UINT_MAX, |
42 | .uses_mmap = true, | |
43 | }; | |
44 | const char *argv[] = { "true", NULL }; | |
45 | ||
46 | signal(SIGCHLD, sig_handler); | |
d723a550 | 47 | |
b22d54b0 | 48 | evlist = perf_evlist__new_default(); |
d723a550 | 49 | if (evlist == NULL) { |
b22d54b0 | 50 | pr_debug("perf_evlist__new_default\n"); |
d723a550 NK |
51 | return -1; |
52 | } | |
d723a550 NK |
53 | |
54 | /* | |
55 | * Create maps of threads and cpus to monitor. In this case | |
56 | * we start with all threads and cpus (-1, -1) but then in | |
57 | * perf_evlist__prepare_workload we'll fill in the only thread | |
58 | * we're monitoring, the one forked there. | |
59 | */ | |
60 | evlist->cpus = cpu_map__dummy_new(); | |
61 | evlist->threads = thread_map__new_by_tid(-1); | |
62 | if (!evlist->cpus || !evlist->threads) { | |
63 | err = -ENOMEM; | |
64 | pr_debug("Not enough memory to create thread/cpu maps\n"); | |
03ad9747 | 65 | goto out_delete_evlist; |
d723a550 NK |
66 | } |
67 | ||
735f7e0b ACM |
68 | err = perf_evlist__prepare_workload(evlist, &target, argv, false, |
69 | workload_exec_failed_signal); | |
d723a550 NK |
70 | if (err < 0) { |
71 | pr_debug("Couldn't run the workload!\n"); | |
03ad9747 | 72 | goto out_delete_evlist; |
d723a550 NK |
73 | } |
74 | ||
75 | evsel = perf_evlist__first(evlist); | |
76 | evsel->attr.task = 1; | |
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; | |
82 | ||
83 | err = perf_evlist__open(evlist); | |
84 | if (err < 0) { | |
85 | pr_debug("Couldn't open the evlist: %s\n", strerror(-err)); | |
03ad9747 | 86 | goto out_delete_evlist; |
d723a550 NK |
87 | } |
88 | ||
89 | if (perf_evlist__mmap(evlist, 128, true) < 0) { | |
90 | pr_debug("failed to mmap events: %d (%s)\n", errno, | |
91 | strerror(errno)); | |
f26e1c7c | 92 | goto out_delete_evlist; |
d723a550 NK |
93 | } |
94 | ||
95 | perf_evlist__start_workload(evlist); | |
96 | ||
97 | retry: | |
98 | while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { | |
8e50d384 ZZ |
99 | if (event->header.type == PERF_RECORD_EXIT) |
100 | nr_exit++; | |
d723a550 | 101 | |
8e50d384 | 102 | perf_evlist__mmap_consume(evlist, 0); |
d723a550 NK |
103 | } |
104 | ||
105 | if (!exited || !nr_exit) { | |
106 | poll(evlist->pollfd, evlist->nr_fds, -1); | |
107 | goto retry; | |
108 | } | |
109 | ||
110 | if (nr_exit != 1) { | |
111 | pr_debug("received %d EXIT records\n", nr_exit); | |
112 | err = -1; | |
113 | } | |
114 | ||
115 | perf_evlist__munmap(evlist); | |
03ad9747 | 116 | out_delete_evlist: |
d723a550 NK |
117 | perf_evlist__delete(evlist); |
118 | return err; | |
119 | } |