1 /* Copyright (C) 2002-2023 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 #include <support/xunistd.h>
29
30 static sigset_t ss;
31 static pthread_barrier_t *b;
32
33
34 static void *
35 tf (void *arg)
36 {
37 pthread_barrier_wait (b);
38
39 puts ("child: calling sigwait now");
40
41 int sig;
42 int err;
43 err = sigwait (&ss, &sig);
44 if (err != 0)
45 {
46 printf ("sigwait returned unsuccessfully: %s (%d)\n",
47 strerror (err), err);
48 _exit (1);
49 }
50
51 puts ("sigwait returned");
52
53 if (sig != SIGINT)
54 {
55 printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
56 _exit (1);
57 }
58
59 puts ("child thread terminating now");
60
61 return NULL;
62 }
63
64
65 static void
66 receiver (void)
67 {
68 pthread_t th;
69
70 /* Make sure the process doesn't run forever. */
71 alarm (10);
72
73 sigfillset (&ss);
74
75 if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
76 {
77 puts ("1st pthread_sigmask failed");
78 _exit (1);
79 }
80
81 if (pthread_create (&th, NULL, tf, NULL) != 0)
82 {
83 puts ("pthread_create failed");
84 _exit (1);
85 }
86
87 if (pthread_join (th, NULL) != 0)
88 {
89 puts ("thread didn't join");
90 _exit (1);
91 }
92
93 puts ("join succeeded");
94
95 _exit (0);
96 }
97
98
99 static int
100 do_test (void)
101 {
102 char tmp[] = "/tmp/tst-signal1-XXXXXX";
103
104 int fd = mkstemp (tmp);
105 if (fd == -1)
106 {
107 puts ("mkstemp failed");
108 exit (1);
109 }
110
111 unlink (tmp);
112
113 int i;
114 for (i = 0; i < 20; ++i)
115 xwrite (fd, "foobar xyzzy", 12);
116
117 b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
118 MAP_SHARED, fd, 0);
119 if (b == MAP_FAILED)
120 {
121 puts ("mmap failed");
122 exit (1);
123 }
124
125 pthread_barrierattr_t ba;
126 if (pthread_barrierattr_init (&ba) != 0)
127 {
128 puts ("barrierattr_init failed");
129 exit (1);
130 }
131
132 if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
133 {
134 puts ("barrierattr_setpshared failed");
135 exit (1);
136 }
137
138 if (pthread_barrier_init (b, &ba, 2) != 0)
139 {
140 puts ("barrier_init failed");
141 exit (1);
142 }
143
144 if (pthread_barrierattr_destroy (&ba) != 0)
145 {
146 puts ("barrierattr_destroy failed");
147 exit (1);
148 }
149
150 pid_t pid = fork ();
151 if (pid == -1)
152 {
153 puts ("fork failed");
154 exit (1);
155 }
156
157 if (pid == 0)
158 receiver ();
159
160 pthread_barrier_wait (b);
161
162 /* Wait a bit more. */
163 struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
164 nanosleep (&ts, NULL);
165
166 /* Send the signal. */
167 puts ("sending the signal now");
168 kill (pid, SIGINT);
169
170 /* Wait for the process to terminate. */
171 int status;
172 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
173 {
174 puts ("wrong child reported terminated");
175 exit (1);
176 }
177
178 if (!WIFEXITED (status))
179 {
180 if (WIFSIGNALED (status))
181 printf ("child exited with signal %d\n", WTERMSIG (status));
182 else
183 puts ("child didn't exit normally");
184 exit (1);
185 }
186
187 if (WEXITSTATUS (status) != 0)
188 {
189 printf ("exit status %d != 0\n", WEXITSTATUS (status));
190 exit (1);
191 }
192
193 return 0;
194 }
195
196 #define TEST_FUNCTION do_test ()
197 #include "../test-skeleton.c"