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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
9static int exited;
10static int nr_exit;
11
12static void sig_handler(int sig __maybe_unused)
13{
14 exited = 1;
15}
16
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 */
21static 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;
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 */
34int test__task_exit(int subtest __maybe_unused)
35{
36 int err = -1;
37 union perf_event *event;
38 struct perf_evsel *evsel;
39 struct perf_evlist *evlist;
40 struct target target = {
41 .uid = UINT_MAX,
42 .uses_mmap = true,
43 };
44 const char *argv[] = { "true", NULL };
45 char sbuf[STRERR_BUFSIZE];
46 struct cpu_map *cpus;
47 struct thread_map *threads;
48
49 signal(SIGCHLD, sig_handler);
50
51 evlist = perf_evlist__new_default();
52 if (evlist == NULL) {
53 pr_debug("perf_evlist__new_default\n");
54 return -1;
55 }
56
57 /*
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.
62 */
63 cpus = cpu_map__dummy_new();
64 threads = thread_map__new_by_tid(-1);
65 if (!cpus || !threads) {
66 err = -ENOMEM;
67 pr_debug("Not enough memory to create thread/cpu maps\n");
68 goto out_free_maps;
69 }
70
71 perf_evlist__set_maps(evlist, cpus, threads);
72
73 cpus = NULL;
74 threads = NULL;
75
76 err = perf_evlist__prepare_workload(evlist, &target, argv, false,
77 workload_exec_failed_signal);
78 if (err < 0) {
79 pr_debug("Couldn't run the workload!\n");
80 goto out_delete_evlist;
81 }
82
83 evsel = perf_evlist__first(evlist);
84 evsel->attr.task = 1;
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;
90
91 err = perf_evlist__open(evlist);
92 if (err < 0) {
93 pr_debug("Couldn't open the evlist: %s\n",
94 strerror_r(-err, sbuf, sizeof(sbuf)));
95 goto out_delete_evlist;
96 }
97
98 if (perf_evlist__mmap(evlist, 128, true) < 0) {
99 pr_debug("failed to mmap events: %d (%s)\n", errno,
100 strerror_r(errno, sbuf, sizeof(sbuf)));
101 goto out_delete_evlist;
102 }
103
104 perf_evlist__start_workload(evlist);
105
106retry:
107 while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) {
108 if (event->header.type == PERF_RECORD_EXIT)
109 nr_exit++;
110
111 perf_evlist__mmap_consume(evlist, 0);
112 }
113
114 if (!exited || !nr_exit) {
115 perf_evlist__poll(evlist, -1);
116 goto retry;
117 }
118
119 if (nr_exit != 1) {
120 pr_debug("received %d EXIT records\n", nr_exit);
121 err = -1;
122 }
123
124out_free_maps:
125 cpu_map__put(cpus);
126 thread_map__put(threads);
127out_delete_evlist:
128 perf_evlist__delete(evlist);
129 return err;
130}
1// SPDX-License-Identifier: GPL-2.0
2#include "evlist.h"
3#include "evsel.h"
4#include "thread_map.h"
5#include "cpumap.h"
6#include "tests.h"
7
8#include <errno.h>
9#include <signal.h>
10
11static int exited;
12static int nr_exit;
13
14static void sig_handler(int sig __maybe_unused)
15{
16 exited = 1;
17}
18
19/*
20 * perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
21 * we asked by setting its exec_error to this handler.
22 */
23static void workload_exec_failed_signal(int signo __maybe_unused,
24 siginfo_t *info __maybe_unused,
25 void *ucontext __maybe_unused)
26{
27 exited = 1;
28 nr_exit = -1;
29}
30
31/*
32 * This test will start a workload that does nothing then it checks
33 * if the number of exit event reported by the kernel is 1 or not
34 * in order to check the kernel returns correct number of event.
35 */
36int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused)
37{
38 int err = -1;
39 union perf_event *event;
40 struct perf_evsel *evsel;
41 struct perf_evlist *evlist;
42 struct target target = {
43 .uid = UINT_MAX,
44 .uses_mmap = true,
45 };
46 const char *argv[] = { "true", NULL };
47 char sbuf[STRERR_BUFSIZE];
48 struct cpu_map *cpus;
49 struct thread_map *threads;
50 struct perf_mmap *md;
51
52 signal(SIGCHLD, sig_handler);
53
54 evlist = perf_evlist__new_default();
55 if (evlist == NULL) {
56 pr_debug("perf_evlist__new_default\n");
57 return -1;
58 }
59
60 /*
61 * Create maps of threads and cpus to monitor. In this case
62 * we start with all threads and cpus (-1, -1) but then in
63 * perf_evlist__prepare_workload we'll fill in the only thread
64 * we're monitoring, the one forked there.
65 */
66 cpus = cpu_map__dummy_new();
67 threads = thread_map__new_by_tid(-1);
68 if (!cpus || !threads) {
69 err = -ENOMEM;
70 pr_debug("Not enough memory to create thread/cpu maps\n");
71 goto out_free_maps;
72 }
73
74 perf_evlist__set_maps(evlist, cpus, threads);
75
76 cpus = NULL;
77 threads = NULL;
78
79 err = perf_evlist__prepare_workload(evlist, &target, argv, false,
80 workload_exec_failed_signal);
81 if (err < 0) {
82 pr_debug("Couldn't run the workload!\n");
83 goto out_delete_evlist;
84 }
85
86 evsel = perf_evlist__first(evlist);
87 evsel->attr.task = 1;
88#ifdef __s390x__
89 evsel->attr.sample_freq = 1000000;
90#else
91 evsel->attr.sample_freq = 1;
92#endif
93 evsel->attr.inherit = 0;
94 evsel->attr.watermark = 0;
95 evsel->attr.wakeup_events = 1;
96 evsel->attr.exclude_kernel = 1;
97
98 err = perf_evlist__open(evlist);
99 if (err < 0) {
100 pr_debug("Couldn't open the evlist: %s\n",
101 str_error_r(-err, sbuf, sizeof(sbuf)));
102 goto out_delete_evlist;
103 }
104
105 if (perf_evlist__mmap(evlist, 128) < 0) {
106 pr_debug("failed to mmap events: %d (%s)\n", errno,
107 str_error_r(errno, sbuf, sizeof(sbuf)));
108 goto out_delete_evlist;
109 }
110
111 perf_evlist__start_workload(evlist);
112
113retry:
114 md = &evlist->mmap[0];
115 if (perf_mmap__read_init(md) < 0)
116 goto out_init;
117
118 while ((event = perf_mmap__read_event(md)) != NULL) {
119 if (event->header.type == PERF_RECORD_EXIT)
120 nr_exit++;
121
122 perf_mmap__consume(md);
123 }
124 perf_mmap__read_done(md);
125
126out_init:
127 if (!exited || !nr_exit) {
128 perf_evlist__poll(evlist, -1);
129 goto retry;
130 }
131
132 if (nr_exit != 1) {
133 pr_debug("received %d EXIT records\n", nr_exit);
134 err = -1;
135 }
136
137out_free_maps:
138 cpu_map__put(cpus);
139 thread_map__put(threads);
140out_delete_evlist:
141 perf_evlist__delete(evlist);
142 return err;
143}