1 /* Copyright (C) 2003-2022 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 <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
cl(void * arg)34 cl (void *arg)
35 {
36 called = 1;
37 }
38
39
40 static void *
tf(void * arg)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 (void) lockf (fd, F_LOCK, 0);
54
55 pthread_cleanup_pop (0);
56
57 return NULL;
58 }
59
60
61 static int
do_test(void)62 do_test (void)
63 {
64 char fname[] = "/tmp/cancel16XXXXXX";
65 fd = mkstemp (fname);
66 if (fd == -1)
67 {
68 puts ("mkstemp failed");
69 return 1;
70 }
71 unlink (fname);
72
73 char mem[sizeof (pthread_barrier_t)];
74 memset (mem, '\0', sizeof (mem));
75 if (TEMP_FAILURE_RETRY (pwrite (fd, mem, sizeof (mem), 0)) != sizeof (mem))
76 {
77 puts ("pwrite failed");
78 return 1;
79 }
80
81 void *p = mmap (NULL, sizeof (mem), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
82 if (p == MAP_FAILED)
83 {
84 puts ("mmap failed");
85 return 1;
86 }
87 pthread_barrier_t *b = (pthread_barrier_t *) p;
88
89 pthread_barrierattr_t ba;
90 if (pthread_barrierattr_init (&ba) != 0)
91 {
92 puts ("barrierattr_init failed");
93 return 1;
94 }
95 if (pthread_barrierattr_setpshared (&ba, 1) != 0)
96 {
97 puts ("barrierattr_setshared failed");
98 return 1;
99 }
100
101 if (pthread_barrier_init (b, &ba, 2) != 0)
102 {
103 puts ("1st barrier_init failed");
104 return 1;
105 }
106 if (pthread_barrierattr_destroy (&ba) != 0)
107 {
108 puts ("barrier_destroy failed");
109 return 1;
110 }
111
112 pid_t pid = fork ();
113 if (pid == 0)
114 {
115 /* Child. Lock the file and wait. */
116 if (lockf (fd, F_LOCK, 0) != 0)
117 {
118 puts ("child process: lockf failed");
119 _exit (1);
120 }
121
122 int r = pthread_barrier_wait (b);
123 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
124 {
125 puts ("child process: 1st barrier_wait failed");
126 _exit (1);
127 }
128
129 /* Make sure the process dies. */
130 alarm (5);
131
132 r = pthread_barrier_wait (b);
133 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
134 {
135 puts ("child process: 2nd barrier_wait failed");
136 _exit (1);
137 }
138
139 _exit (0);
140 }
141 if (pid == -1)
142 {
143 puts ("fork failed");
144 return 1;
145 }
146
147 int r = pthread_barrier_wait (b);
148 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
149 {
150 puts ("main: 1st barrier_wait failed");
151 _exit (1);
152 }
153
154 if (pthread_barrier_init (&b2, NULL, 2) != 0)
155 {
156 puts ("2nd barrier_init failed");
157 return 1;
158 }
159
160 pthread_t th;
161 if (pthread_create (&th, NULL, tf, NULL) != 0)
162 {
163 puts ("create failed");
164 return 1;
165 }
166
167 r = pthread_barrier_wait (&b2);
168 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
169 {
170 puts ("main: 2nd barrier_wait failed");
171 return 1;
172 }
173
174 /* Delay. */
175 sleep (1);
176
177 if (pthread_cancel (th) != 0)
178 {
179 puts ("cancel failed");
180 return 1;
181 }
182
183 void *result;
184 if (pthread_join (th, &result) != 0)
185 {
186 puts ("join failed");
187 return 1;
188 }
189 if (result != PTHREAD_CANCELED)
190 {
191 puts ("thread not canceled");
192 return 1;
193 }
194 if (called == 0)
195 {
196 puts ("cleanup handler not called");
197 return 1;
198 }
199
200 r = pthread_barrier_wait (b);
201 if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
202 {
203 puts ("main: 3rd barrier_wait failed");
204 return 1;
205 }
206
207 int status;
208 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
209 {
210 puts ("waitpid failed");
211 return 1;
212 }
213 if (WEXITSTATUS (status) != 0)
214 {
215 printf ("child process exits with %d\n", WEXITSTATUS (status));
216 return 1;
217 }
218
219 if (lockf (fd, F_LOCK, 0) != 0)
220 {
221 puts ("main: lockf failed");
222 return 1;
223 }
224
225 return 0;
226 }
227
228 #define TEST_FUNCTION do_test ()
229 #include "../test-skeleton.c"
230