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
|
/* Copyright (C) 2003-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
The GNU C Library 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 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
static char fname[] = "/tmp/tst-cond12-XXXXXX";
static int fd;
static void prepare (void);
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
static void
prepare (void)
{
fd = mkstemp (fname);
if (fd == -1)
{
printf ("mkstemp failed: %m\n");
exit (1);
}
add_temp_file (fname);
if (ftruncate (fd, 1000) < 0)
{
printf ("ftruncate failed: %m\n");
exit (1);
}
}
static int
do_test (void)
{
struct
{
pthread_mutex_t m;
pthread_cond_t c;
int var;
} *p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED)
{
printf ("initial mmap failed: %m\n");
return 1;
}
pthread_mutexattr_t ma;
if (pthread_mutexattr_init (&ma) != 0)
{
puts ("mutexattr_init failed");
return 1;
}
if (pthread_mutexattr_setpshared (&ma, 1) != 0)
{
puts ("mutexattr_setpshared failed");
return 1;
}
if (pthread_mutex_init (&p->m, &ma) != 0)
{
puts ("mutex_init failed");
return 1;
}
if (pthread_mutexattr_destroy (&ma) != 0)
{
puts ("mutexattr_destroy failed");
return 1;
}
pthread_condattr_t ca;
if (pthread_condattr_init (&ca) != 0)
{
puts ("condattr_init failed");
return 1;
}
if (pthread_condattr_setpshared (&ca, 1) != 0)
{
puts ("condattr_setpshared failed");
return 1;
}
if (pthread_cond_init (&p->c, &ca) != 0)
{
puts ("mutex_init failed");
return 1;
}
if (pthread_condattr_destroy (&ca) != 0)
{
puts ("condattr_destroy failed");
return 1;
}
if (pthread_mutex_lock (&p->m) != 0)
{
puts ("initial mutex_lock failed");
return 1;
}
p->var = 42;
pid_t pid = fork ();
if (pid == -1)
{
printf ("fork failed: %m\n");
return 1;
}
if (pid == 0)
{
void *oldp = p;
p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == oldp)
{
puts ("child: mapped to same address");
kill (getppid (), SIGKILL);
exit (1);
}
munmap (oldp, sizeof (*p));
if (pthread_mutex_lock (&p->m) != 0)
{
puts ("child: mutex_lock failed");
kill (getppid (), SIGKILL);
exit (1);
}
p->var = 0;
#ifndef USE_COND_SIGNAL
if (pthread_cond_broadcast (&p->c) != 0)
{
puts ("child: cond_broadcast failed");
kill (getppid (), SIGKILL);
exit (1);
}
#else
if (pthread_cond_signal (&p->c) != 0)
{
puts ("child: cond_signal failed");
kill (getppid (), SIGKILL);
exit (1);
}
#endif
if (pthread_mutex_unlock (&p->m) != 0)
{
puts ("child: mutex_unlock failed");
kill (getppid (), SIGKILL);
exit (1);
}
exit (0);
}
do
pthread_cond_wait (&p->c, &p->m);
while (p->var != 0);
if (TEMP_FAILURE_RETRY (waitpid (pid, NULL, 0)) != pid)
{
printf ("waitpid failed: %m\n");
kill (pid, SIGKILL);
return 1;
}
return 0;
}
|
