1// SPDX-License-Identifier: GPL-2.0
2#define _GNU_SOURCE
3#include <linux/membarrier.h>
4#include <syscall.h>
5#include <stdio.h>
6#include <errno.h>
7#include <string.h>
8#include <pthread.h>
9
10#include "membarrier_test_impl.h"
11
12static int thread_ready, thread_quit;
13static pthread_mutex_t test_membarrier_thread_mutex =
14 PTHREAD_MUTEX_INITIALIZER;
15static pthread_cond_t test_membarrier_thread_cond =
16 PTHREAD_COND_INITIALIZER;
17
18void *test_membarrier_thread(void *arg)
19{
20 pthread_mutex_lock(&test_membarrier_thread_mutex);
21 thread_ready = 1;
22 pthread_cond_broadcast(&test_membarrier_thread_cond);
23 pthread_mutex_unlock(&test_membarrier_thread_mutex);
24
25 pthread_mutex_lock(&test_membarrier_thread_mutex);
26 while (!thread_quit)
27 pthread_cond_wait(&test_membarrier_thread_cond,
28 &test_membarrier_thread_mutex);
29 pthread_mutex_unlock(&test_membarrier_thread_mutex);
30
31 return NULL;
32}
33
34static int test_mt_membarrier(void)
35{
36 int i;
37 pthread_t test_thread;
38
39 pthread_create(&test_thread, NULL,
40 test_membarrier_thread, NULL);
41
42 pthread_mutex_lock(&test_membarrier_thread_mutex);
43 while (!thread_ready)
44 pthread_cond_wait(&test_membarrier_thread_cond,
45 &test_membarrier_thread_mutex);
46 pthread_mutex_unlock(&test_membarrier_thread_mutex);
47
48 test_membarrier_fail();
49
50 test_membarrier_success();
51
52 pthread_mutex_lock(&test_membarrier_thread_mutex);
53 thread_quit = 1;
54 pthread_cond_broadcast(&test_membarrier_thread_cond);
55 pthread_mutex_unlock(&test_membarrier_thread_mutex);
56
57 pthread_join(test_thread, NULL);
58
59 return 0;
60}
61
62int main(int argc, char **argv)
63{
64 ksft_print_header();
65 ksft_set_plan(plan: 16);
66
67 test_membarrier_query();
68
69 /* Multi-threaded */
70 test_mt_membarrier();
71
72 return ksft_exit_pass();
73}
74

source code of linux/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c