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