1 /* Copyright (C) 2002-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <errno.h>
19 #include <pthread.h>
20 #include <signal.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24 #include <sys/mman.h>
25 #include <sys/wait.h>
26 #include <string.h>
27
28
29 static sigset_t ss;
30 static pthread_barrier_t *b;
31
32
33 static void *
tf(void * arg)34 tf (void *arg)
35 {
36 pthread_barrier_wait (b);
37
38 puts ("child: calling sigwait now");
39
40 int sig;
41 int err;
42 err = sigwait (&ss, &sig);
43 if (err != 0)
44 {
45 printf ("sigwait returned unsuccessfully: %s (%d)\n",
46 strerror (err), err);
47 _exit (1);
48 }
49
50 puts ("sigwait returned");
51
52 if (sig != SIGINT)
53 {
54 printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
55 _exit (1);
56 }
57
58 puts ("child thread terminating now");
59
60 return NULL;
61 }
62
63
64 static void
receiver(void)65 receiver (void)
66 {
67 pthread_t th;
68
69 /* Make sure the process doesn't run forever. */
70 alarm (10);
71
72 sigfillset (&ss);
73
74 if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
75 {
76 puts ("1st pthread_sigmask failed");
77 _exit (1);
78 }
79
80 if (pthread_create (&th, NULL, tf, NULL) != 0)
81 {
82 puts ("pthread_create failed");
83 _exit (1);
84 }
85
86 if (pthread_join (th, NULL) != 0)
87 {
88 puts ("thread didn't join");
89 _exit (1);
90 }
91
92 puts ("join succeeded");
93
94 _exit (0);
95 }
96
97
98 static int
do_test(void)99 do_test (void)
100 {
101 char tmp[] = "/tmp/tst-signal1-XXXXXX";
102
103 int fd = mkstemp (tmp);
104 if (fd == -1)
105 {
106 puts ("mkstemp failed");
107 exit (1);
108 }
109
110 unlink (tmp);
111
112 int i;
113 for (i = 0; i < 20; ++i)
114 write (fd, "foobar xyzzy", 12);
115
116 b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
117 MAP_SHARED, fd, 0);
118 if (b == MAP_FAILED)
119 {
120 puts ("mmap failed");
121 exit (1);
122 }
123
124 pthread_barrierattr_t ba;
125 if (pthread_barrierattr_init (&ba) != 0)
126 {
127 puts ("barrierattr_init failed");
128 exit (1);
129 }
130
131 if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
132 {
133 puts ("barrierattr_setpshared failed");
134 exit (1);
135 }
136
137 if (pthread_barrier_init (b, &ba, 2) != 0)
138 {
139 puts ("barrier_init failed");
140 exit (1);
141 }
142
143 if (pthread_barrierattr_destroy (&ba) != 0)
144 {
145 puts ("barrierattr_destroy failed");
146 exit (1);
147 }
148
149 pid_t pid = fork ();
150 if (pid == -1)
151 {
152 puts ("fork failed");
153 exit (1);
154 }
155
156 if (pid == 0)
157 receiver ();
158
159 pthread_barrier_wait (b);
160
161 /* Wait a bit more. */
162 struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
163 nanosleep (&ts, NULL);
164
165 /* Send the signal. */
166 puts ("sending the signal now");
167 kill (pid, SIGINT);
168
169 /* Wait for the process to terminate. */
170 int status;
171 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
172 {
173 puts ("wrong child reported terminated");
174 exit (1);
175 }
176
177 if (!WIFEXITED (status))
178 {
179 if (WIFSIGNALED (status))
180 printf ("child exited with signal %d\n", WTERMSIG (status));
181 else
182 puts ("child didn't exit normally");
183 exit (1);
184 }
185
186 if (WEXITSTATUS (status) != 0)
187 {
188 printf ("exit status %d != 0\n", WEXITSTATUS (status));
189 exit (1);
190 }
191
192 return 0;
193 }
194
195 #define TEST_FUNCTION do_test ()
196 #include "../test-skeleton.c"
197