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1/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <pthread.h>
21#include <stdint.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <unistd.h>
26#include <sys/mman.h>
27#include <sys/time.h>
28#include <sys/wait.h>
29
30
31static int
32do_test (void)
33{
34 size_t ps = sysconf (_SC_PAGESIZE);
35 char tmpfname[] = "/tmp/tst-mutex9.XXXXXX";
36 char data[ps];
37 void *mem;
38 int fd;
39 pthread_mutex_t *m;
40 pthread_mutexattr_t a;
41 pid_t pid;
42
43 fd = mkstemp (tmpfname);
44 if (fd == -1)
45 {
46 printf ("cannot open temporary file: %m\n");
47 return 1;
48 }
49
50 /* Make sure it is always removed. */
51 unlink (tmpfname);
52
53 /* Create one page of data. */
54 memset (data, '\0', ps);
55
56 /* Write the data to the file. */
57 if (write (fd, data, ps) != (ssize_t) ps)
58 {
59 puts ("short write");
60 return 1;
61 }
62
63 mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
64 if (mem == MAP_FAILED)
65 {
66 printf ("mmap failed: %m\n");
67 return 1;
68 }
69
70 m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))
71 & ~(__alignof (pthread_mutex_t) - 1));
72
73 if (pthread_mutexattr_init (&a) != 0)
74 {
75 puts ("mutexattr_init failed");
76 return 1;
77 }
78
79 if (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0)
80 {
81 puts ("mutexattr_setpshared failed");
82 return 1;
83 }
84
85 if (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE) != 0)
86 {
87 puts ("mutexattr_settype failed");
88 return 1;
89 }
90
91#ifdef ENABLE_PI
92 if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)
93 {
94 puts ("pthread_mutexattr_setprotocol failed");
95 return 1;
96 }
97#endif
98
99 int e;
100 if ((e = pthread_mutex_init (m, &a)) != 0)
101 {
102#ifdef ENABLE_PI
103 if (e == ENOTSUP)
104 {
105 puts ("PI mutexes unsupported");
106 return 0;
107 }
108#endif
109 puts ("mutex_init failed");
110 return 1;
111 }
112
113 if (pthread_mutex_lock (m) != 0)
114 {
115 puts ("mutex_lock failed");
116 return 1;
117 }
118
119 if (pthread_mutexattr_destroy (&a) != 0)
120 {
121 puts ("mutexattr_destroy failed");
122 return 1;
123 }
124
125 puts ("going to fork now");
126 pid = fork ();
127 if (pid == -1)
128 {
129 puts ("fork failed");
130 return 1;
131 }
132 else if (pid == 0)
133 {
134 if (pthread_mutex_trylock (m) == 0)
135 {
136 puts ("child: mutex_trylock succeeded");
137 exit (1);
138 }
139
140 if (pthread_mutex_unlock (m) == 0)
141 {
142 puts ("child: mutex_unlock succeeded");
143 exit (1);
144 }
145
146 struct timeval tv;
147 gettimeofday (&tv, NULL);
148 struct timespec ts;
149 TIMEVAL_TO_TIMESPEC (&tv, &ts);
150 ts.tv_nsec += 500000000;
151 if (ts.tv_nsec >= 1000000000)
152 {
153 ++ts.tv_sec;
154 ts.tv_nsec -= 1000000000;
155 }
156
157 e = pthread_mutex_timedlock (m, &ts);
158 if (e == 0)
159 {
160 puts ("child: mutex_timedlock succeeded");
161 exit (1);
162 }
163 if (e != ETIMEDOUT)
164 {
165 puts ("child: mutex_timedlock didn't time out");
166 exit (1);
167 }
168
169 alarm (1);
170
171 pthread_mutex_lock (m);
172
173 puts ("child: mutex_lock returned");
174
175 exit (0);
176 }
177
178 sleep (2);
179
180 int status;
181 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
182 {
183 puts ("waitpid failed");
184 return 1;
185 }
186 if (! WIFSIGNALED (status))
187 {
188 puts ("child not killed by signal");
189 return 1;
190 }
191 if (WTERMSIG (status) != SIGALRM)
192 {
193 puts ("child not killed by SIGALRM");
194 return 1;
195 }
196
197 return 0;
198}
199
200#define TEST_FUNCTION do_test ()
201#include "../test-skeleton.c"
202

Warning: That file was not part of the compilation database. It may have many parsing errors.