1 | /* Copyright (C) 2002-2024 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 (barrier: b); |
38 | |
39 | puts (s: "child: calling sigwait now" ); |
40 | |
41 | int sig; |
42 | int err; |
43 | err = sigwait (set: &ss, sig: &sig); |
44 | if (err != 0) |
45 | { |
46 | printf (format: "sigwait returned unsuccessfully: %s (%d)\n" , |
47 | strerror (errnum: err), err); |
48 | _exit (1); |
49 | } |
50 | |
51 | puts (s: "sigwait returned" ); |
52 | |
53 | if (sig != SIGINT) |
54 | { |
55 | printf (format: "caught signal %d, expected %d (SIGINT)\n" , sig, SIGINT); |
56 | _exit (1); |
57 | } |
58 | |
59 | puts (s: "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, newmask: &ss, NULL) != 0) |
76 | { |
77 | puts (s: "1st pthread_sigmask failed" ); |
78 | _exit (1); |
79 | } |
80 | |
81 | if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0) |
82 | { |
83 | puts (s: "pthread_create failed" ); |
84 | _exit (1); |
85 | } |
86 | |
87 | if (pthread_join (th: th, NULL) != 0) |
88 | { |
89 | puts (s: "thread didn't join" ); |
90 | _exit (1); |
91 | } |
92 | |
93 | puts (s: "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 (template: tmp); |
105 | if (fd == -1) |
106 | { |
107 | puts (s: "mkstemp failed" ); |
108 | exit (1); |
109 | } |
110 | |
111 | unlink (name: tmp); |
112 | |
113 | int i; |
114 | for (i = 0; i < 20; ++i) |
115 | xwrite (fd, "foobar xyzzy" , 12); |
116 | |
117 | b = mmap (NULL, len: sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE, |
118 | MAP_SHARED, fd: fd, offset: 0); |
119 | if (b == MAP_FAILED) |
120 | { |
121 | puts (s: "mmap failed" ); |
122 | exit (1); |
123 | } |
124 | |
125 | pthread_barrierattr_t ba; |
126 | if (pthread_barrierattr_init (attr: &ba) != 0) |
127 | { |
128 | puts (s: "barrierattr_init failed" ); |
129 | exit (1); |
130 | } |
131 | |
132 | if (pthread_barrierattr_setpshared (attr: &ba, PTHREAD_PROCESS_SHARED) != 0) |
133 | { |
134 | puts (s: "barrierattr_setpshared failed" ); |
135 | exit (1); |
136 | } |
137 | |
138 | if (pthread_barrier_init (barrier: b, attr: &ba, count: 2) != 0) |
139 | { |
140 | puts (s: "barrier_init failed" ); |
141 | exit (1); |
142 | } |
143 | |
144 | if (pthread_barrierattr_destroy (attr: &ba) != 0) |
145 | { |
146 | puts (s: "barrierattr_destroy failed" ); |
147 | exit (1); |
148 | } |
149 | |
150 | pid_t pid = fork (); |
151 | if (pid == -1) |
152 | { |
153 | puts (s: "fork failed" ); |
154 | exit (1); |
155 | } |
156 | |
157 | if (pid == 0) |
158 | receiver (); |
159 | |
160 | pthread_barrier_wait (barrier: b); |
161 | |
162 | /* Wait a bit more. */ |
163 | struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 }; |
164 | nanosleep (requested_time: &ts, NULL); |
165 | |
166 | /* Send the signal. */ |
167 | puts (s: "sending the signal now" ); |
168 | kill (pid: 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 (s: "wrong child reported terminated" ); |
175 | exit (1); |
176 | } |
177 | |
178 | if (!WIFEXITED (status)) |
179 | { |
180 | if (WIFSIGNALED (status)) |
181 | printf (format: "child exited with signal %d\n" , WTERMSIG (status)); |
182 | else |
183 | puts (s: "child didn't exit normally" ); |
184 | exit (1); |
185 | } |
186 | |
187 | if (WEXITSTATUS (status) != 0) |
188 | { |
189 | printf (format: "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" |
198 | |