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      1 /*-
      2  * Copyright (c) 2011 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 <link_elf.h>
     32 #include <pthread.h>
     33 #include <stdlib.h>
     34 #include <stdio.h>
     35 #include <string.h>
     36 #include <unistd.h>
     37 
     38 int sleep_init;
     39 int sleep_fini;
     40 int dlopen_cookie;
     41 int dlclose_cookie;
     42 
     43 void (*tls_callback_sym)(void);
     44 
     45 static int
     46 dl_iterate_phdr_cb(struct dl_phdr_info *info, size_t size, void *data)
     47 {
     48 	(*tls_callback_sym)();
     49 	return 0;
     50 }
     51 
     52 static void *
     53 test_dl_iterate_phdr_helper(void *dummy)
     54 {
     55 	sleep(10);
     56 	_exit(1);
     57 }
     58 
     59 static void
     60 test_dl_iterate_phdr(void)
     61 {
     62 	pthread_t t;
     63 	void *dso;
     64 	sleep_init = 0;
     65 	sleep_fini = 0;
     66 	if ((dso = dlopen("libh_helper_dso2.so", RTLD_LAZY)) == NULL) {
     67 		fprintf(stderr, "opening helper failed\n");
     68 		_exit(1);
     69 	}
     70 	tls_callback_sym = dlsym(dso, "tls_callback");
     71 	if (tls_callback_sym == NULL) {
     72 		fprintf(stderr, "bad helper\n");
     73 		_exit(1);
     74 	}
     75 	pthread_create(&t, NULL, test_dl_iterate_phdr_helper, NULL);
     76 	if (dl_iterate_phdr(dl_iterate_phdr_cb, NULL))
     77 		_exit(1);
     78 	_exit(0);
     79 }
     80 
     81 static void *
     82 init_fini_helper(void *arg)
     83 {
     84 	void *dso;
     85 	if ((dso = dlopen(arg, RTLD_LAZY)) == NULL) {
     86 		fprintf(stderr, "opening %s failed\n", (char *)arg);
     87 		exit(1);
     88 	}
     89 	dlclose(dso);
     90 	return NULL;
     91 }
     92 
     93 static void
     94 test_dlopen(void)
     95 {
     96 	pthread_t t1, t2;
     97 	sleep_init = 1;
     98 	sleep_fini = 0;
     99 	printf("%d\n", dlopen_cookie);
    100 	pthread_create(&t1, NULL, init_fini_helper,
    101 	    __UNCONST("libh_helper_dso2.so"));
    102 	sleep(1);
    103 	printf("%d\n", dlopen_cookie);
    104 	if (dlopen_cookie != 1)
    105 		_exit(1);
    106 	sleep(1);
    107 	pthread_create(&t2, NULL, init_fini_helper,
    108 	    __UNCONST("libutil.so"));
    109 	printf("%d\n", dlopen_cookie);
    110 	if (dlopen_cookie != 1)
    111 		_exit(1);
    112 	_exit(0);
    113 }
    114 
    115 static void
    116 test_dlclose(void)
    117 {
    118 	pthread_t t1, t2;
    119 	sleep_init = 0;
    120 	sleep_fini = 1;
    121 	printf("%d\n", dlclose_cookie);
    122 	pthread_create(&t1, NULL, init_fini_helper,
    123 	    __UNCONST("libh_helper_dso2.so"));
    124 	sleep(1);
    125 	printf("%d\n", dlclose_cookie);
    126 	if (dlclose_cookie != 2)
    127 		_exit(1);
    128 	pthread_create(&t2, NULL, init_fini_helper,
    129 	    __UNCONST("libutil.so"));
    130 	sleep(1);
    131 	printf("%d\n", dlclose_cookie);
    132 	if (dlclose_cookie != 2)
    133 		_exit(1);
    134 	_exit(0);
    135 }
    136 
    137 int
    138 main(int argc, char **argv)
    139 {
    140 	if (argc != 2)
    141 		return 1;
    142 	if (strcmp(argv[1], "dl_iterate_phdr") == 0)
    143 		test_dl_iterate_phdr();
    144 	if (strcmp(argv[1], "dlopen") == 0)
    145 		test_dlopen();
    146 	if (strcmp(argv[1], "dlclose") == 0)
    147 		test_dlclose();
    148 	return 1;
    149 }
    150