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
42extern void foo();
43
44#if __MAC_OS_X_VERSION_MIN_REQUIRED
45
46static volatile int		sBarrier = 0;
47static pthread_mutex_t	sBarrierMutex;
48static pthread_cond_t	sBarrierFree;
49
50static 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
58static 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
70static pthread_mutex_t	sMyLock;
71
72static 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
85static 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
97int 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}
123