pthread_vfork_test.c revision 225736 
1/*-
2 * Copyright (c) 2008 Ganbold Tsagaankhuu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/9/tools/test/pthread_vfork/pthread_vfork_test.c 185695 2008-12-06 13:23:53Z ganbold $");
31
32#include <err.h>
33#include <pthread.h>
34#include <signal.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39
40#define NUM_THREADS 100
41
42void *
43vfork_test(void *threadid)
44{
45	pid_t pid;
46
47	for (;;) {
48		pid = vfork();
49		if (pid == 0)
50			_exit(0);
51		else if (pid == -1)
52			err(1, "Failed to vfork");
53	}
54	return (NULL);
55}
56
57/*
58 * This program invokes multiple threads and each thread calls
59 * vfork() system call.
60 */
61int
62main(void)
63{
64	pthread_t threads[NUM_THREADS];
65	struct sigaction reapchildren;
66	int rc, t;
67
68	memset(&reapchildren, 0, sizeof(reapchildren));
69	reapchildren.sa_handler = SIG_IGN;
70
71	/* Automatically reap zombies. */
72	if (sigaction(SIGCHLD, &reapchildren, NULL) == -1)
73		err(1, "Could not sigaction(SIGCHLD)");
74
75	for (t = 0; t < NUM_THREADS; t++) {
76		rc = pthread_create(&threads[t], NULL, vfork_test, (void *)t);
77		if (rc)
78			errc(1, rc, "pthread_create");
79	}
80	return (0);
81}
82