1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/*
* Read/Write lock functions for testing
*
* Copyright (C) 2010-2024, Joachim Metz <joachim.metz@gmail.com>
*
* Refer to AUTHORS for acknowledgements.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <common.h>
#if defined( HAVE_STDLIB_H ) || defined( WINAPI )
#include <stdlib.h>
#endif
#include <errno.h>
#if defined( HAVE_GNU_DL_DLSYM ) && defined( __GNUC__ )
#define __USE_GNU
#include <dlfcn.h>
#undef __USE_GNU
#endif
#include "fsntfs_test_rwlock.h"
#if defined( HAVE_FSNTFS_TEST_RWLOCK )
static int (*fsntfs_test_real_pthread_rwlock_destroy)(pthread_rwlock_t *) = NULL;
static int (*fsntfs_test_real_pthread_rwlock_rdlock)(pthread_rwlock_t *) = NULL;
static int (*fsntfs_test_real_pthread_rwlock_wrlock)(pthread_rwlock_t *) = NULL;
static int (*fsntfs_test_real_pthread_rwlock_unlock)(pthread_rwlock_t *) = NULL;
int fsntfs_test_pthread_rwlock_destroy_attempts_before_fail = -1;
int fsntfs_test_pthread_rwlock_rdlock_attempts_before_fail = -1;
int fsntfs_test_pthread_rwlock_wrlock_attempts_before_fail = -1;
int fsntfs_test_pthread_rwlock_unlock_attempts_before_fail = -1;
#if defined( TODO )
/* TODO currently disabled since this causes the tests to segfault on Ubuntu 14.04
*/
static int (*fsntfs_test_real_pthread_rwlock_init)(pthread_rwlock_t *, const pthread_rwlockattr_t *) = NULL;
int fsntfs_test_pthread_rwlock_init_attempts_before_fail = -1;
/* Custom pthread_rwlock_init for testing error cases
* Returns 0 if successful or an error value otherwise
*/
int pthread_rwlock_init(
pthread_rwlock_t *rwlock,
const pthread_rwlockattr_t *attr )
{
int result = 0;
if( fsntfs_test_real_pthread_rwlock_init == NULL )
{
fsntfs_test_real_pthread_rwlock_init = dlsym(
RTLD_NEXT,
"pthread_rwlock_init" );
}
if( fsntfs_test_pthread_rwlock_init_attempts_before_fail == 0 )
{
fsntfs_test_pthread_rwlock_init_attempts_before_fail = -1;
return( EBUSY );
}
else if( fsntfs_test_pthread_rwlock_init_attempts_before_fail > 0 )
{
fsntfs_test_pthread_rwlock_init_attempts_before_fail--;
}
result = fsntfs_test_real_pthread_rwlock_init(
rwlock,
attr );
return( result );
}
#endif /* defined( TODO ) */
/* Custom pthread_rwlock_destroy for testing error cases
* Returns 0 if successful or an error value otherwise
*/
int pthread_rwlock_destroy(
pthread_rwlock_t *rwlock )
{
int result = 0;
if( fsntfs_test_real_pthread_rwlock_destroy == NULL )
{
fsntfs_test_real_pthread_rwlock_destroy = dlsym(
RTLD_NEXT,
"pthread_rwlock_destroy" );
}
if( fsntfs_test_pthread_rwlock_destroy_attempts_before_fail == 0 )
{
fsntfs_test_pthread_rwlock_destroy_attempts_before_fail = -1;
return( EBUSY );
}
else if( fsntfs_test_pthread_rwlock_destroy_attempts_before_fail > 0 )
{
fsntfs_test_pthread_rwlock_destroy_attempts_before_fail--;
}
result = fsntfs_test_real_pthread_rwlock_destroy(
rwlock );
return( result );
}
/* Custom pthread_rwlock_rdlock for testing error cases
* Returns 0 if successful or an error value otherwise
*/
int pthread_rwlock_rdlock(
pthread_rwlock_t *rwlock )
{
int result = 0;
if( fsntfs_test_real_pthread_rwlock_rdlock == NULL )
{
fsntfs_test_real_pthread_rwlock_rdlock = dlsym(
RTLD_NEXT,
"pthread_rwlock_rdlock" );
}
if( fsntfs_test_pthread_rwlock_rdlock_attempts_before_fail == 0 )
{
fsntfs_test_pthread_rwlock_rdlock_attempts_before_fail = -1;
return( EBUSY );
}
else if( fsntfs_test_pthread_rwlock_rdlock_attempts_before_fail > 0 )
{
fsntfs_test_pthread_rwlock_rdlock_attempts_before_fail--;
}
result = fsntfs_test_real_pthread_rwlock_rdlock(
rwlock );
return( result );
}
/* Custom pthread_rwlock_wrlock for testing error cases
* Returns 0 if successful or an error value otherwise
*/
int pthread_rwlock_wrlock(
pthread_rwlock_t *rwlock )
{
int result = 0;
if( fsntfs_test_real_pthread_rwlock_wrlock == NULL )
{
fsntfs_test_real_pthread_rwlock_wrlock = dlsym(
RTLD_NEXT,
"pthread_rwlock_wrlock" );
}
if( fsntfs_test_pthread_rwlock_wrlock_attempts_before_fail == 0 )
{
fsntfs_test_pthread_rwlock_wrlock_attempts_before_fail = -1;
return( EBUSY );
}
else if( fsntfs_test_pthread_rwlock_wrlock_attempts_before_fail > 0 )
{
fsntfs_test_pthread_rwlock_wrlock_attempts_before_fail--;
}
result = fsntfs_test_real_pthread_rwlock_wrlock(
rwlock );
return( result );
}
/* Custom pthread_rwlock_unlock for testing error cases
* Returns 0 if successful or an error value otherwise
*/
int pthread_rwlock_unlock(
pthread_rwlock_t *rwlock )
{
int result = 0;
if( fsntfs_test_real_pthread_rwlock_unlock == NULL )
{
fsntfs_test_real_pthread_rwlock_unlock = dlsym(
RTLD_NEXT,
"pthread_rwlock_unlock" );
}
if( fsntfs_test_pthread_rwlock_unlock_attempts_before_fail == 0 )
{
/* Unlock the lock otherwise it can enter a nondeterministic state
*/
fsntfs_test_real_pthread_rwlock_unlock(
rwlock );
fsntfs_test_pthread_rwlock_unlock_attempts_before_fail = -1;
return( EBUSY );
}
else if( fsntfs_test_pthread_rwlock_unlock_attempts_before_fail > 0 )
{
fsntfs_test_pthread_rwlock_unlock_attempts_before_fail--;
}
result = fsntfs_test_real_pthread_rwlock_unlock(
rwlock );
return( result );
}
#endif /* defined( HAVE_FSNTFS_TEST_RWLOCK ) */
|
