94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/*-
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* Copyright (c) 2017 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Joerg Sonnenberger.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <dlfcn.h>
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#include <err.h>
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#include <pthread.h>
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#include <stdio.h>
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static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_cond_t cond1 = PTHREAD_COND_INITIALIZER;
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static pthread_cond_t cond2 = PTHREAD_COND_INITIALIZER;
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static void *
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thread_helper(void *arg)
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{
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void (*testfunc)(void) = arg;
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testfunc();
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pthread_mutex_lock(&mutex);
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pthread_cond_broadcast(&cond1);
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pthread_mutex_unlock(&mutex);
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pthread_mutex_lock(&mutex);
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pthread_cond_wait(&cond2, &mutex);
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pthread_mutex_unlock(&mutex);
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return NULL;
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}
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int
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main(void)
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{
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void *dso;
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void (*testfunc)(void);
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pthread_t thread;
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dso = dlopen("libh_helper_dso3.so", RTLD_LAZY);
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if (dso == NULL)
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errx(1, "%s", dlerror());
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testfunc = dlsym(dso, "testfunc");
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if (testfunc == NULL)
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errx(1, "%s", dlerror());
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pthread_mutex_lock(&mutex);
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if (pthread_create(&thread, NULL, thread_helper, testfunc))
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err(1, "pthread_create");
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pthread_cond_wait(&cond1, &mutex);
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pthread_mutex_unlock(&mutex);
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printf("before dlclose\n");
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dlclose(dso);
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printf("after dlclose\n");
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dso = dlopen("libh_helper_dso3.so", RTLD_LAZY);
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if (dso == NULL)
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errx(1, "%s", dlerror());
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dlclose(dso);
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pthread_mutex_lock(&mutex);
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pthread_cond_signal(&cond2);
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pthread_mutex_unlock(&mutex);
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if (pthread_join(thread, NULL))
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err(1, "pthread_join");
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return 0;
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}
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