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
|
/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static pthread_mutex_t m1 = PTHREAD_MUTEX_INITIALIZER;
static pthread_mutex_t m2 = PTHREAD_MUTEX_INITIALIZER;
static int cntr;
static void
cleanup (void *arg)
{
if (arg != (void *) 42l)
cntr = 42;
else
cntr = 1;
}
static void *
tf (void *arg)
{
/* Ignore all signals. This must not have any effect on delivering
the cancellation signal. */
sigset_t ss;
sigfillset (&ss);
if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
{
puts ("pthread_sigmask failed");
exit (1);
}
pthread_cleanup_push (cleanup, (void *) 42l);
int err = pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
if (err != 0)
{
printf ("setcanceltype failed: %s\n", strerror (err));
exit (1);
}
/* The following code is not standard compliant: the mutex functions
must not be called with asynchronous cancellation enabled. */
err = pthread_mutex_unlock (&m2);
if (err != 0)
{
printf ("child: mutex_unlock failed: %s\n", strerror (err));
exit (1);
}
err = pthread_mutex_lock (&m1);
if (err != 0)
{
printf ("child: 1st mutex_lock failed: %s\n", strerror (err));
exit (1);
}
/* We should never come here. */
pthread_cleanup_pop (0);
return NULL;
}
static int
do_test (void)
{
int err;
pthread_t th;
int result = 0;
void *retval;
/* Get the mutexes. */
err = pthread_mutex_lock (&m1);
if (err != 0)
{
printf ("parent: 1st mutex_lock failed: %s\n", strerror (err));
return 1;
}
err = pthread_mutex_lock (&m2);
if (err != 0)
{
printf ("parent: 2nd mutex_lock failed: %s\n", strerror (err));
return 1;
}
err = pthread_create (&th, NULL, tf, NULL);
if (err != 0)
{
printf ("create failed: %s\n", strerror (err));
return 1;
}
err = pthread_mutex_lock (&m2);
if (err != 0)
{
printf ("parent: 3rd mutex_lock failed: %s\n", strerror (err));
return 1;
}
err = pthread_cancel (th);
if (err != 0)
{
printf ("cancel failed: %s\n", strerror (err));
return 1;
}
err = pthread_join (th, &retval);
if (err != 0)
{
printf ("join failed: %s\n", strerror (err));
return 1;
}
if (retval != PTHREAD_CANCELED)
{
printf ("wrong return value: %p\n", retval);
result = 1;
}
if (cntr == 42)
{
puts ("cleanup handler called with wrong argument");
result = 1;
}
else if (cntr != 1)
{
puts ("cleanup handling not called");
result = 1;
}
return result;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
GitWeb