1/*-
2 * Copyright (c) 2017 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Joerg Sonnenberger.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <dlfcn.h>
31#include <err.h>
32#include <pthread.h>
33#include <stdio.h>
34
35static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
36static pthread_cond_t cond1 = PTHREAD_COND_INITIALIZER;
37static pthread_cond_t cond2 = PTHREAD_COND_INITIALIZER;
38
39static void *
40thread_helper(void *arg)
41{
42	void (*testfunc)(void) = arg;
43	testfunc();
44
45	pthread_mutex_lock(&mutex);
46	pthread_cond_broadcast(&cond1);
47	pthread_mutex_unlock(&mutex);
48
49	pthread_mutex_lock(&mutex);
50	pthread_cond_wait(&cond2, &mutex);
51	pthread_mutex_unlock(&mutex);
52
53	return NULL;
54}
55
56int
57main(void)
58{
59	void *dso;
60	void (*testfunc)(void);
61	pthread_t thread;
62
63	dso = dlopen("libh_helper_dso3.so", RTLD_LAZY);
64	if (dso == NULL)
65		errx(1, "%s", dlerror());
66	testfunc = dlsym(dso, "testfunc");
67	if (testfunc == NULL)
68		errx(1, "%s", dlerror());
69
70	pthread_mutex_lock(&mutex);
71
72	if (pthread_create(&thread, NULL, thread_helper, testfunc))
73		err(1, "pthread_create");
74
75	pthread_cond_wait(&cond1, &mutex);
76	pthread_mutex_unlock(&mutex);
77
78	printf("before dlclose\n");
79	dlclose(dso);
80	printf("after dlclose\n");
81	dso = dlopen("libh_helper_dso3.so", RTLD_LAZY);
82	if (dso == NULL)
83		errx(1, "%s", dlerror());
84	dlclose(dso);
85
86	pthread_mutex_lock(&mutex);
87	pthread_cond_signal(&cond2);
88	pthread_mutex_unlock(&mutex);
89
90	if (pthread_join(thread, NULL))
91		err(1, "pthread_join");
92	return 0;
93}
94