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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}
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}