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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 "debug.h"
3#include "evlist.h"
4#include "evsel.h"
5#include "target.h"
6#include "thread_map.h"
7#include "tests.h"
8#include "util/mmap.h"
9
10#include <errno.h>
11#include <signal.h>
12#include <linux/string.h>
13#include <perf/cpumap.h>
14#include <perf/evlist.h>
15#include <perf/mmap.h>
16
17static int exited;
18static int nr_exit;
19
20static void sig_handler(int sig __maybe_unused)
21{
22 exited = 1;
23}
24
25/*
26 * perf_evlist__prepare_workload will send a SIGUSR1 if the fork fails, since
27 * we asked by setting its exec_error to this handler.
28 */
29static void workload_exec_failed_signal(int signo __maybe_unused,
30 siginfo_t *info __maybe_unused,
31 void *ucontext __maybe_unused)
32{
33 exited = 1;
34 nr_exit = -1;
35}
36
37/*
38 * This test will start a workload that does nothing then it checks
39 * if the number of exit event reported by the kernel is 1 or not
40 * in order to check the kernel returns correct number of event.
41 */
42int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused)
43{
44 int err = -1;
45 union perf_event *event;
46 struct evsel *evsel;
47 struct evlist *evlist;
48 struct target target = {
49 .uid = UINT_MAX,
50 .uses_mmap = true,
51 };
52 const char *argv[] = { "true", NULL };
53 char sbuf[STRERR_BUFSIZE];
54 struct perf_cpu_map *cpus;
55 struct perf_thread_map *threads;
56 struct mmap *md;
57 int retry_count = 0;
58
59 signal(SIGCHLD, sig_handler);
60
61 evlist = perf_evlist__new_default();
62 if (evlist == NULL) {
63 pr_debug("perf_evlist__new_default\n");
64 return -1;
65 }
66
67 /*
68 * Create maps of threads and cpus to monitor. In this case
69 * we start with all threads and cpus (-1, -1) but then in
70 * perf_evlist__prepare_workload we'll fill in the only thread
71 * we're monitoring, the one forked there.
72 */
73 cpus = perf_cpu_map__dummy_new();
74 threads = thread_map__new_by_tid(-1);
75 if (!cpus || !threads) {
76 err = -ENOMEM;
77 pr_debug("Not enough memory to create thread/cpu maps\n");
78 goto out_free_maps;
79 }
80
81 perf_evlist__set_maps(&evlist->core, cpus, threads);
82
83 cpus = NULL;
84 threads = NULL;
85
86 err = perf_evlist__prepare_workload(evlist, &target, argv, false,
87 workload_exec_failed_signal);
88 if (err < 0) {
89 pr_debug("Couldn't run the workload!\n");
90 goto out_delete_evlist;
91 }
92
93 evsel = evlist__first(evlist);
94 evsel->core.attr.task = 1;
95#ifdef __s390x__
96 evsel->core.attr.sample_freq = 1000000;
97#else
98 evsel->core.attr.sample_freq = 1;
99#endif
100 evsel->core.attr.inherit = 0;
101 evsel->core.attr.watermark = 0;
102 evsel->core.attr.wakeup_events = 1;
103 evsel->core.attr.exclude_kernel = 1;
104
105 err = evlist__open(evlist);
106 if (err < 0) {
107 pr_debug("Couldn't open the evlist: %s\n",
108 str_error_r(-err, sbuf, sizeof(sbuf)));
109 goto out_delete_evlist;
110 }
111
112 if (evlist__mmap(evlist, 128) < 0) {
113 pr_debug("failed to mmap events: %d (%s)\n", errno,
114 str_error_r(errno, sbuf, sizeof(sbuf)));
115 err = -1;
116 goto out_delete_evlist;
117 }
118
119 perf_evlist__start_workload(evlist);
120
121retry:
122 md = &evlist->mmap[0];
123 if (perf_mmap__read_init(&md->core) < 0)
124 goto out_init;
125
126 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
127 if (event->header.type == PERF_RECORD_EXIT)
128 nr_exit++;
129
130 perf_mmap__consume(&md->core);
131 }
132 perf_mmap__read_done(&md->core);
133
134out_init:
135 if (!exited || !nr_exit) {
136 evlist__poll(evlist, -1);
137
138 if (retry_count++ > 1000) {
139 pr_debug("Failed after retrying 1000 times\n");
140 err = -1;
141 goto out_free_maps;
142 }
143
144 goto retry;
145 }
146
147 if (nr_exit != 1) {
148 pr_debug("received %d EXIT records\n", nr_exit);
149 err = -1;
150 }
151
152out_free_maps:
153 perf_cpu_map__put(cpus);
154 perf_thread_map__put(threads);
155out_delete_evlist:
156 evlist__delete(evlist);
157 return err;
158}