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2b778ceb | 1 | /* Copyright (C) 2003-2021 Free Software Foundation, Inc. |
53f9084e UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
53f9084e UD |
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 | ||
29 | static char fname[] = "/tmp/tst-cond12-XXXXXX"; | |
30 | static int fd; | |
31 | ||
32 | ||
3ccd8d27 UD |
33 | static void prepare (void); |
34 | #define PREPARE(argc, argv) prepare () | |
35 | ||
36 | static int do_test (void); | |
37 | #define TEST_FUNCTION do_test () | |
38 | ||
39 | #include "../test-skeleton.c" | |
40 | ||
41 | ||
53f9084e UD |
42 | static void |
43 | prepare (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 | } | |
53f9084e UD |
58 | |
59 | ||
60 | static int | |
61 | do_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 | ||
1d9b73ab | 157 | #ifndef USE_COND_SIGNAL |
53f9084e UD |
158 | if (pthread_cond_broadcast (&p->c) != 0) |
159 | { | |
160 | puts ("child: cond_broadcast failed"); | |
161 | kill (getppid (), SIGKILL); | |
162 | exit (1); | |
163 | } | |
1d9b73ab UD |
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 | |
53f9084e UD |
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 | } |