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