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