1 /*
2 * This file is part of count-f strace test.
3 *
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include "tests.h"
31 #include <assert.h>
32 #include <errno.h>
33 #include <pthread.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <sys/wait.h>
37 #include <unistd.h>
38
39 #define N 32
40 #define P 8
41 #define T 4
42
43 static void *
thread(void * arg)44 thread(void *arg)
45 {
46 unsigned int i;
47
48 assert(chdir(".") == 0);
49 for (i = 0; i < N; ++i) {
50 assert(chdir("") == -1);
51 assert(chdir(".") == 0);
52 }
53
54 return NULL;
55 }
56
57 static int
process(void)58 process(void)
59 {
60 unsigned int i;
61 pthread_t t[T];
62
63 for (i = 0; i < T; ++i) {
64 errno = pthread_create(&t[i], NULL, thread, NULL);
65 if (errno)
66 perror_msg_and_fail("pthread_create");
67 }
68
69 for (i = 0; i < T; ++i) {
70 void *retval;
71 errno = pthread_join(t[i], &retval);
72 if (errno)
73 perror_msg_and_fail("pthread_join");
74 }
75
76 return 0;
77 }
78
79 int
main(void)80 main(void)
81 {
82 unsigned int i;
83 pid_t p[P];
84
85 for (i = 0; i < P; ++i) {
86 p[i] = fork();
87 if (p[i] < 0)
88 perror_msg_and_fail("fork");
89 if (!p[i])
90 return process();
91 }
92 for (i = 0; i < P; ++i) {
93 int s;
94
95 assert(waitpid(p[i], &s, 0) == p[i]);
96 assert(WIFEXITED(s));
97 if (WEXITSTATUS(s))
98 return WEXITSTATUS(s);
99 }
100
101 return 0;
102 }
103