1/*
2 * Copyright (c) 2010 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23#include <stdio.h>  // fprintf(), NULL
24#include <stdlib.h> // exit(), EXIT_SUCCESS
25#include <string.h>
26#include <unistd.h>
27#include <mach-o/dyld_priv.h>
28
29#include <dlfcn.h>
30#include <pthread.h>
31
32#include "test.h" // PASS(), FAIL(), XPASS(), XFAIL()
33
34
35static void* work(void* libName)
36{
37	for (int i=0; i < 500; ++i) {
38		void* handle = dlopen((char*)libName, 0);
39		if ( handle == NULL ) {
40			FAIL("dlopen failed: %s", dlerror());
41			exit(0);
42		}
43		dlclose(handle);
44	}
45
46	return NULL;
47}
48
49static const char* batchMappedHandler(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
50{
51	usleep(10000);
52	return NULL;
53}
54
55
56int main()
57{
58	// tell dyld we want to know when images are mapped
59	dyld_register_image_state_change_handler(dyld_image_state_initialized, false, batchMappedHandler);
60
61	// other thread dlopens and closes libfoo.dylib 500 times
62	pthread_t t1;
63	if ( pthread_create(&t1, NULL, work, "libfoo1.dylib") != 0 ) {
64		FAIL("pthread_create failed");
65		exit(0);
66	}
67
68	pthread_t t2;
69	if ( pthread_create(&t2, NULL, work, "libfoo2.dylib") != 0 ) {
70		FAIL("pthread_create failed");
71		exit(0);
72	}
73
74	pthread_t t3;
75	if ( pthread_create(&t3, NULL, work, "libfoo3.dylib") != 0 ) {
76		FAIL("pthread_create failed");
77		exit(0);
78	}
79
80	pthread_t t4;
81	if ( pthread_create(&t4, NULL, work, "libfoo4.dylib") != 0 ) {
82		FAIL("pthread_create failed");
83		exit(0);
84	}
85
86	void* result;
87	pthread_join(t1, &result);
88	pthread_join(t2, &result);
89	pthread_join(t3, &result);
90	pthread_join(t4, &result);
91
92	PASS("concurrent-dlopen-initializers");
93	return 0;
94}
95