1 /*	$OpenBSD: pthread_join.c,v 1.5 2018/04/27 06:47:34 guenther Exp $	*/
2 /*
3  * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors,
4  * proven@mit.edu All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
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  * 3. All advertising materials mentioning features or use of this software
15  *    must display the following acknowledgement:
16  *	This product includes software developed by Chris Provenzano,
17  *	the University of California, Berkeley, and contributors.
18  * 4. Neither the name of Chris Provenzano, the University, nor the names of
19  *   contributors may be used to endorse or promote products derived
20  *   from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR
26  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 /* ==== test_pthread_join.c =================================================
36  * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
37  *
38  * Description : Test pthread_join(). Run this after test_create()
39  *
40  *  1.23 94/05/04 proven
41  *      -Started coding this file.
42  */
43 
44 #include <err.h>
45 #include <pthread.h>
46 #include <signal.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <unistd.h>
50 #include "test.h"
51 
52 static void
53 handler(int sig)
54 {
55 }
56 
57 /* This thread yields so the creator has a live thread to wait on */
58 static void *
59 new_thread_1(void * new_buf)
60 {
61 	int i;
62 
63 	snprintf((char *)new_buf, 512, "New thread %%d stack at %p\n", &i);
64 	pthread_yield();	/* (ensure parent can wait on live thread) */
65 	sleep(2);
66 	return(new_buf);
67 	PANIC("return");
68 }
69 
70 /* This thread doesn't yield so the creator has a dead thread to wait on */
71 static void *
72 new_thread_2(void * new_buf)
73 {
74 	int i;
75 
76 	snprintf((char *)new_buf, 512, "New thread %%d stack at %p\n", &i);
77 	return(new_buf);
78 	PANIC("return");
79 }
80 
81 int
82 main(int argc, char *argv[])
83 {
84 	struct sigaction sa;
85 	sigset_t mask;
86 	char buf[256], *status;
87 	pthread_t thread;
88 	int debug = 1;
89 	int i = 0;
90 
91 	sa.sa_handler = &handler;
92 	sigemptyset(&sa.sa_mask);
93 	sa.sa_flags = 0;
94 	if (sigaction(SIGALRM, &sa, NULL))
95 		err(1, "sigaction");
96 	sigemptyset(&mask);
97 	sigaddset(&mask, SIGALRM);
98 
99 	if (debug)
100 		printf("Original thread stack at %p\n", &i);
101 
102 	if (sigprocmask(SIG_BLOCK, &mask, NULL))
103 		err(1, "sigprocmask");
104 	CHECKr(pthread_create(&thread, NULL, new_thread_1, (void *)buf));
105 	if (sigprocmask(SIG_UNBLOCK, &mask, NULL))
106 		err(1, "sigprocmask");
107 	alarm(1);
108 	CHECKr(pthread_join(thread, (void **)(&status)));
109 	if (debug)
110 		printf(status, ++i);
111 
112 	/* Now have the created thread finishing before the join. */
113 	CHECKr(pthread_create(&thread, NULL, new_thread_2, (void *)buf));
114 	pthread_yield();
115 	sleep(1); /* (ensure thread is dead) */
116 	CHECKr(pthread_join(thread, (void **)(&status)));
117 
118 	if (debug)
119 		printf(status, ++i);
120 
121 	SUCCEED;
122 }
123 
124