1 /* Copyright (C) 2003-2023 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 <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 #include <sys/mman.h>
25 #include <sys/wait.h>
26
27
28 static pthread_barrier_t b2;
29 static int fd;
30 static int called;
31
32
33 static void
34 cl (void *arg)
35 {
36 called = 1;
37 }
38
39
40 static void *
41 tf (void *arg)
42 {
43 int r = pthread_barrier_wait (&b2);
44 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
45 {
46 puts ("child thread: barrier_wait failed");
47 exit (1);
48 }
49
50 pthread_cleanup_push (cl, NULL);
51
52 /* This call should never return. */
53 if (lockf (fd, F_LOCK, 0))
54 {
55 puts ("child thread: lockf failed");
56 exit (1);
57 }
58
59 pthread_cleanup_pop (0);
60
61 return NULL;
62 }
63
64
65 static int
66 do_test (void)
67 {
68 char fname[] = "/tmp/cancel16XXXXXX";
69 fd = mkstemp (fname);
70 if (fd == -1)
71 {
72 puts ("mkstemp failed");
73 return 1;
74 }
75 unlink (fname);
76
77 char mem[sizeof (pthread_barrier_t)];
78 memset (mem, '\0', sizeof (mem));
79 if (TEMP_FAILURE_RETRY (pwrite (fd, mem, sizeof (mem), 0)) != sizeof (mem))
80 {
81 puts ("pwrite failed");
82 return 1;
83 }
84
85 void *p = mmap (NULL, sizeof (mem), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
86 if (p == MAP_FAILED)
87 {
88 puts ("mmap failed");
89 return 1;
90 }
91 pthread_barrier_t *b = (pthread_barrier_t *) p;
92
93 pthread_barrierattr_t ba;
94 if (pthread_barrierattr_init (&ba) != 0)
95 {
96 puts ("barrierattr_init failed");
97 return 1;
98 }
99 if (pthread_barrierattr_setpshared (&ba, 1) != 0)
100 {
101 puts ("barrierattr_setshared failed");
102 return 1;
103 }
104
105 if (pthread_barrier_init (b, &ba, 2) != 0)
106 {
107 puts ("1st barrier_init failed");
108 return 1;
109 }
110 if (pthread_barrierattr_destroy (&ba) != 0)
111 {
112 puts ("barrier_destroy failed");
113 return 1;
114 }
115
116 pid_t pid = fork ();
117 if (pid == 0)
118 {
119 /* Child. Lock the file and wait. */
120 if (lockf (fd, F_LOCK, 0) != 0)
121 {
122 puts ("child process: lockf failed");
123 _exit (1);
124 }
125
126 int r = pthread_barrier_wait (b);
127 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
128 {
129 puts ("child process: 1st barrier_wait failed");
130 _exit (1);
131 }
132
133 /* Make sure the process dies. */
134 alarm (5);
135
136 r = pthread_barrier_wait (b);
137 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
138 {
139 puts ("child process: 2nd barrier_wait failed");
140 _exit (1);
141 }
142
143 _exit (0);
144 }
145 if (pid == -1)
146 {
147 puts ("fork failed");
148 return 1;
149 }
150
151 int r = pthread_barrier_wait (b);
152 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
153 {
154 puts ("main: 1st barrier_wait failed");
155 _exit (1);
156 }
157
158 if (pthread_barrier_init (&b2, NULL, 2) != 0)
159 {
160 puts ("2nd barrier_init failed");
161 return 1;
162 }
163
164 pthread_t th;
165 if (pthread_create (&th, NULL, tf, NULL) != 0)
166 {
167 puts ("create failed");
168 return 1;
169 }
170
171 r = pthread_barrier_wait (&b2);
172 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
173 {
174 puts ("main: 2nd barrier_wait failed");
175 return 1;
176 }
177
178 /* Delay. */
179 sleep (1);
180
181 if (pthread_cancel (th) != 0)
182 {
183 puts ("cancel failed");
184 return 1;
185 }
186
187 void *result;
188 if (pthread_join (th, &result) != 0)
189 {
190 puts ("join failed");
191 return 1;
192 }
193 if (result != PTHREAD_CANCELED)
194 {
195 puts ("thread not canceled");
196 return 1;
197 }
198 if (called == 0)
199 {
200 puts ("cleanup handler not called");
201 return 1;
202 }
203
204 r = pthread_barrier_wait (b);
205 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
206 {
207 puts ("main: 3rd barrier_wait failed");
208 return 1;
209 }
210
211 int status;
212 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
213 {
214 puts ("waitpid failed");
215 return 1;
216 }
217 if (WEXITSTATUS (status) != 0)
218 {
219 printf ("child process exits with %d\n", WEXITSTATUS (status));
220 return 1;
221 }
222
223 if (lockf (fd, F_LOCK, 0) != 0)
224 {
225 puts ("main: lockf failed");
226 return 1;
227 }
228
229 return 0;
230 }
231
232 #define TEST_FUNCTION do_test ()
233 #include "../test-skeleton.c"