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
|
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <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>
#include <string.h>
static sigset_t ss;
static pthread_barrier_t *b;
static void *
tf (void *arg)
{
pthread_barrier_wait (b);
puts ("child: calling sigwait now");
int sig;
int err;
err = sigwait (&ss, &sig);
if (err != 0)
{
printf ("sigwait returned unsuccessfully: %s (%d)\n",
strerror (err), err);
_exit (1);
}
puts ("sigwait returned");
if (sig != SIGINT)
{
printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
_exit (1);
}
puts ("child thread terminating now");
return NULL;
}
static void
receiver (void)
{
pthread_t th;
/* Make sure the process doesn't run forever. */
alarm (10);
sigfillset (&ss);
if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
{
puts ("1st pthread_sigmask failed");
_exit (1);
}
if (pthread_create (&th, NULL, tf, NULL) != 0)
{
puts ("pthread_create failed");
_exit (1);
}
if (pthread_join (th, NULL) != 0)
{
puts ("thread didn't join");
_exit (1);
}
puts ("join succeeded");
_exit (0);
}
static int
do_test (void)
{
char tmp[] = "/tmp/tst-signal1-XXXXXX";
int fd = mkstemp (tmp);
if (fd == -1)
{
puts ("mkstemp failed");
exit (1);
}
unlink (tmp);
int i;
for (i = 0; i < 20; ++i)
write (fd, "foobar xyzzy", 12);
b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
MAP_SHARED, fd, 0);
if (b == MAP_FAILED)
{
puts ("mmap failed");
exit (1);
}
pthread_barrierattr_t ba;
if (pthread_barrierattr_init (&ba) != 0)
{
puts ("barrierattr_init failed");
exit (1);
}
if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
{
puts ("barrierattr_setpshared failed");
exit (1);
}
if (pthread_barrier_init (b, &ba, 2) != 0)
{
puts ("barrier_init failed");
exit (1);
}
if (pthread_barrierattr_destroy (&ba) != 0)
{
puts ("barrierattr_destroy failed");
exit (1);
}
pid_t pid = fork ();
if (pid == -1)
{
puts ("fork failed");
exit (1);
}
if (pid == 0)
receiver ();
pthread_barrier_wait (b);
/* Wait a bit more. */
struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
nanosleep (&ts, NULL);
/* Send the signal. */
puts ("sending the signal now");
kill (pid, SIGINT);
/* Wait for the process to terminate. */
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("wrong child reported terminated");
exit (1);
}
if (!WIFEXITED (status))
{
if (WIFSIGNALED (status))
printf ("child exited with signal %d\n", WTERMSIG (status));
else
puts ("child didn't exit normally");
exit (1);
}
if (WEXITSTATUS (status) != 0)
{
printf ("exit status %d != 0\n", WEXITSTATUS (status));
exit (1);
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
