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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 <signal.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <unistd.h>
25#include <sys/mman.h>
26#include <sys/wait.h>
27
28
29static char fname[] = "/tmp/tst-cond12-XXXXXX";
30static int fd;
31
32
33static void prepare (void);
34#define PREPARE(argc, argv) prepare ()
35
36static int do_test (void);
37#define TEST_FUNCTION do_test ()
38
39#include "../test-skeleton.c"
40
41
42static void
43prepare (void)
44{
45 fd = mkstemp (fname);
46 if (fd == -1)
47 {
48 printf ("mkstemp failed: %m\n");
49 exit (1);
50 }
51 add_temp_file (fname);
52 if (ftruncate (fd, 1000) < 0)
53 {
54 printf ("ftruncate failed: %m\n");
55 exit (1);
56 }
57}
58
59
60static int
61do_test (void)
62{
63 struct
64 {
65 pthread_mutex_t m;
66 pthread_cond_t c;
67 int var;
68 } *p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
69 if (p == MAP_FAILED)
70 {
71 printf ("initial mmap failed: %m\n");
72 return 1;
73 }
74
75 pthread_mutexattr_t ma;
76 if (pthread_mutexattr_init (&ma) != 0)
77 {
78 puts ("mutexattr_init failed");
79 return 1;
80 }
81 if (pthread_mutexattr_setpshared (&ma, 1) != 0)
82 {
83 puts ("mutexattr_setpshared failed");
84 return 1;
85 }
86 if (pthread_mutex_init (&p->m, &ma) != 0)
87 {
88 puts ("mutex_init failed");
89 return 1;
90 }
91 if (pthread_mutexattr_destroy (&ma) != 0)
92 {
93 puts ("mutexattr_destroy failed");
94 return 1;
95 }
96
97 pthread_condattr_t ca;
98 if (pthread_condattr_init (&ca) != 0)
99 {
100 puts ("condattr_init failed");
101 return 1;
102 }
103 if (pthread_condattr_setpshared (&ca, 1) != 0)
104 {
105 puts ("condattr_setpshared failed");
106 return 1;
107 }
108 if (pthread_cond_init (&p->c, &ca) != 0)
109 {
110 puts ("mutex_init failed");
111 return 1;
112 }
113 if (pthread_condattr_destroy (&ca) != 0)
114 {
115 puts ("condattr_destroy failed");
116 return 1;
117 }
118
119 if (pthread_mutex_lock (&p->m) != 0)
120 {
121 puts ("initial mutex_lock failed");
122 return 1;
123 }
124
125 p->var = 42;
126
127 pid_t pid = fork ();
128 if (pid == -1)
129 {
130 printf ("fork failed: %m\n");
131 return 1;
132 }
133
134 if (pid == 0)
135 {
136 void *oldp = p;
137 p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
138
139 if (p == oldp)
140 {
141 puts ("child: mapped to same address");
142 kill (getppid (), SIGKILL);
143 exit (1);
144 }
145
146 munmap (oldp, sizeof (*p));
147
148 if (pthread_mutex_lock (&p->m) != 0)
149 {
150 puts ("child: mutex_lock failed");
151 kill (getppid (), SIGKILL);
152 exit (1);
153 }
154
155 p->var = 0;
156
157#ifndef USE_COND_SIGNAL
158 if (pthread_cond_broadcast (&p->c) != 0)
159 {
160 puts ("child: cond_broadcast failed");
161 kill (getppid (), SIGKILL);
162 exit (1);
163 }
164#else
165 if (pthread_cond_signal (&p->c) != 0)
166 {
167 puts ("child: cond_signal failed");
168 kill (getppid (), SIGKILL);
169 exit (1);
170 }
171#endif
172
173 if (pthread_mutex_unlock (&p->m) != 0)
174 {
175 puts ("child: mutex_unlock failed");
176 kill (getppid (), SIGKILL);
177 exit (1);
178 }
179
180 exit (0);
181 }
182
183 do
184 pthread_cond_wait (&p->c, &p->m);
185 while (p->var != 0);
186
187 if (TEMP_FAILURE_RETRY (waitpid (pid, NULL, 0)) != pid)
188 {
189 printf ("waitpid failed: %m\n");
190 kill (pid, SIGKILL);
191 return 1;
192 }
193
194 return 0;
195}
196

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