dyld-635.2.tar.gz
[apple/dyld.git] / unit-tests / test-cases / deadlock / main.c
1 /*
2 * Copyright (c) 2005-2009 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>
24 #include <stdlib.h>
25 #include <mach-o/dyld.h>
26 #include <pthread.h>
27 #include <unistd.h>
28 #include <Availability.h>
29
30 #include "test.h"
31
32 /// rdar://problem/3811777
33
34 // barrier thread 1 thread 2
35 // add image
36 // 1
37 // acquire sMyLock
38 // 2
39 // in callback acquire sMyLock call lazy pointer
40 // release sMyLock release sMyLock
41
42 extern void foo();
43
44 #if __MAC_OS_X_VERSION_MIN_REQUIRED
45
46 static volatile int sBarrier = 0;
47 static pthread_mutex_t sBarrierMutex;
48 static pthread_cond_t sBarrierFree;
49
50 static void blockUntilBarrier(int n)
51 {
52 pthread_mutex_lock(&sBarrierMutex);
53 while ( sBarrier < n )
54 pthread_cond_wait(&sBarrierFree, &sBarrierMutex);
55 pthread_mutex_unlock(&sBarrierMutex);
56 }
57
58 static void advanceToBarrier(int n)
59 {
60 pthread_mutex_lock(&sBarrierMutex);
61 sBarrier = n;
62 pthread_cond_broadcast(&sBarrierFree);
63 pthread_mutex_unlock(&sBarrierMutex);
64 }
65
66
67
68
69
70 static pthread_mutex_t sMyLock;
71
72 static void* thread2(void* arg)
73 {
74 // thread 2
75 blockUntilBarrier(1);
76 pthread_mutex_lock(&sMyLock);
77 advanceToBarrier(2);
78 foo();
79 pthread_mutex_unlock(&sMyLock);
80 return NULL;
81 }
82
83
84
85 static void myImageHandler(const struct mach_header *mh, intptr_t vmaddr_slide)
86 {
87 // thread 1
88 if ( NSLookupSymbolInImage(mh, "_bar", 0) != NULL ) {
89 advanceToBarrier(1);
90 blockUntilBarrier(2);
91 pthread_mutex_lock(&sMyLock);
92 pthread_mutex_unlock(&sMyLock);
93 }
94 }
95 #endif
96
97 int main()
98 {
99 #if __MAC_OS_X_VERSION_MIN_REQUIRED
100 pthread_mutex_init(&sBarrierMutex, NULL);
101 pthread_cond_init(&sBarrierFree, NULL);
102 pthread_mutex_init(&sMyLock, NULL);
103
104 // self-terminate this process if it locks up for two seconds
105 alarm(2);
106
107 advanceToBarrier(0);
108
109 pthread_t pthread2;
110 if ( pthread_create(&pthread2, NULL, thread2, NULL) != 0 ) {
111 FAIL("pthread_create failed");
112 exit(0);
113 }
114
115 // thread 1
116 _dyld_register_func_for_add_image(&myImageHandler);
117 NSAddImage("bar.dylib", 0);
118 #endif
119
120 PASS("deadlock");
121 return 0;
122 }