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2b778ceb | 1 | /* Copyright (C) 2002-2021 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
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/>. */ |
76a50749 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <pthread.h> | |
ceaa9889 | 21 | #include <stdint.h> |
76a50749 UD |
22 | #include <stdio.h> |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/mman.h> | |
27 | #include <sys/wait.h> | |
28 | ||
29 | ||
30 | int *condition; | |
31 | ||
b910f788 RM |
32 | static int |
33 | do_test (void) | |
76a50749 UD |
34 | { |
35 | size_t ps = sysconf (_SC_PAGESIZE); | |
36 | char tmpfname[] = "/tmp/tst-cond4.XXXXXX"; | |
37 | char data[ps]; | |
38 | void *mem; | |
39 | int fd; | |
40 | pthread_mutexattr_t ma; | |
41 | pthread_mutex_t *mut1; | |
42 | pthread_mutex_t *mut2; | |
43 | pthread_condattr_t ca; | |
44 | pthread_cond_t *cond; | |
45 | pid_t pid; | |
46 | int result = 0; | |
47 | int p; | |
48 | ||
49 | fd = mkstemp (tmpfname); | |
50 | if (fd == -1) | |
51 | { | |
52 | printf ("cannot open temporary file: %m\n"); | |
b910f788 | 53 | return 1; |
76a50749 UD |
54 | } |
55 | ||
56 | /* Make sure it is always removed. */ | |
57 | unlink (tmpfname); | |
58 | ||
59 | /* Create one page of data. */ | |
60 | memset (data, '\0', ps); | |
61 | ||
62 | /* Write the data to the file. */ | |
f9657e88 | 63 | if (write (fd, data, ps) != (ssize_t) ps) |
76a50749 UD |
64 | { |
65 | puts ("short write"); | |
b910f788 | 66 | return 1; |
76a50749 UD |
67 | } |
68 | ||
69 | mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); | |
70 | if (mem == MAP_FAILED) | |
71 | { | |
72 | printf ("mmap failed: %m\n"); | |
b910f788 | 73 | return 1; |
76a50749 UD |
74 | } |
75 | ||
76 | mut1 = (pthread_mutex_t *) (((uintptr_t) mem | |
77 | + __alignof (pthread_mutex_t)) | |
78 | & ~(__alignof (pthread_mutex_t) - 1)); | |
79 | mut2 = mut1 + 1; | |
80 | ||
81 | cond = (pthread_cond_t *) (((uintptr_t) (mut2 + 1) | |
82 | + __alignof (pthread_cond_t)) | |
83 | & ~(__alignof (pthread_cond_t) - 1)); | |
84 | ||
85 | condition = (int *) (((uintptr_t) (cond + 1) + __alignof (int)) | |
86 | & ~(__alignof (int) - 1)); | |
87 | ||
88 | if (pthread_mutexattr_init (&ma) != 0) | |
89 | { | |
90 | puts ("mutexattr_init failed"); | |
b910f788 | 91 | return 1; |
76a50749 UD |
92 | } |
93 | ||
94 | if (pthread_mutexattr_getpshared (&ma, &p) != 0) | |
95 | { | |
96 | puts ("1st mutexattr_getpshared failed"); | |
b910f788 | 97 | return 1; |
76a50749 UD |
98 | } |
99 | ||
100 | if (p != PTHREAD_PROCESS_PRIVATE) | |
101 | { | |
102 | puts ("default pshared value wrong"); | |
b910f788 | 103 | return 1; |
76a50749 UD |
104 | } |
105 | ||
106 | if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0) | |
107 | { | |
108 | puts ("mutexattr_setpshared failed"); | |
b910f788 | 109 | return 1; |
76a50749 UD |
110 | } |
111 | ||
112 | if (pthread_mutexattr_getpshared (&ma, &p) != 0) | |
113 | { | |
114 | puts ("2nd mutexattr_getpshared failed"); | |
b910f788 | 115 | return 1; |
76a50749 UD |
116 | } |
117 | ||
118 | if (p != PTHREAD_PROCESS_SHARED) | |
119 | { | |
120 | puts ("pshared value after setpshared call wrong"); | |
b910f788 | 121 | return 1; |
76a50749 UD |
122 | } |
123 | ||
124 | if (pthread_mutex_init (mut1, &ma) != 0) | |
125 | { | |
126 | puts ("1st mutex_init failed"); | |
b910f788 | 127 | return 1; |
76a50749 UD |
128 | } |
129 | ||
130 | if (pthread_mutex_init (mut2, &ma) != 0) | |
131 | { | |
132 | puts ("2nd mutex_init failed"); | |
b910f788 | 133 | return 1; |
76a50749 UD |
134 | } |
135 | ||
136 | if (pthread_condattr_init (&ca) != 0) | |
137 | { | |
138 | puts ("condattr_init failed"); | |
b910f788 | 139 | return 1; |
76a50749 UD |
140 | } |
141 | ||
700bf7af UD |
142 | if (pthread_condattr_getpshared (&ca, &p) != 0) |
143 | { | |
144 | puts ("1st condattr_getpshared failed"); | |
b910f788 | 145 | return 1; |
700bf7af UD |
146 | } |
147 | ||
148 | if (p != PTHREAD_PROCESS_PRIVATE) | |
149 | { | |
150 | puts ("default value for pshared in condattr wrong"); | |
b910f788 | 151 | return 1; |
700bf7af UD |
152 | } |
153 | ||
76a50749 UD |
154 | if (pthread_condattr_setpshared (&ca, PTHREAD_PROCESS_SHARED) != 0) |
155 | { | |
156 | puts ("condattr_setpshared failed"); | |
b910f788 | 157 | return 1; |
76a50749 UD |
158 | } |
159 | ||
700bf7af UD |
160 | if (pthread_condattr_getpshared (&ca, &p) != 0) |
161 | { | |
162 | puts ("2nd condattr_getpshared failed"); | |
b910f788 | 163 | return 1; |
700bf7af UD |
164 | } |
165 | ||
166 | if (p != PTHREAD_PROCESS_SHARED) | |
167 | { | |
168 | puts ("pshared condattr still not set"); | |
b910f788 | 169 | return 1; |
700bf7af UD |
170 | } |
171 | ||
76a50749 UD |
172 | if (pthread_cond_init (cond, &ca) != 0) |
173 | { | |
174 | puts ("cond_init failed"); | |
b910f788 | 175 | return 1; |
76a50749 UD |
176 | } |
177 | ||
178 | if (pthread_mutex_lock (mut1) != 0) | |
179 | { | |
180 | puts ("parent: 1st mutex_lock failed"); | |
b910f788 | 181 | return 1; |
76a50749 UD |
182 | } |
183 | ||
184 | puts ("going to fork now"); | |
185 | pid = fork (); | |
186 | if (pid == -1) | |
187 | { | |
188 | puts ("fork failed"); | |
b910f788 | 189 | return 1; |
76a50749 UD |
190 | } |
191 | else if (pid == 0) | |
192 | { | |
193 | if (pthread_mutex_lock (mut2) != 0) | |
194 | { | |
195 | puts ("child: mutex_lock failed"); | |
b910f788 | 196 | return 1; |
76a50749 UD |
197 | } |
198 | ||
199 | if (pthread_mutex_unlock (mut1) != 0) | |
200 | { | |
201 | puts ("child: 1st mutex_unlock failed"); | |
b910f788 | 202 | return 1; |
76a50749 UD |
203 | } |
204 | ||
205 | do | |
206 | if (pthread_cond_wait (cond, mut2) != 0) | |
207 | { | |
208 | puts ("child: cond_wait failed"); | |
b910f788 | 209 | return 1; |
76a50749 UD |
210 | } |
211 | while (*condition == 0); | |
212 | ||
213 | if (pthread_mutex_unlock (mut2) != 0) | |
214 | { | |
215 | puts ("child: 2nd mutex_unlock failed"); | |
b910f788 | 216 | return 1; |
76a50749 UD |
217 | } |
218 | ||
219 | puts ("child done"); | |
220 | } | |
221 | else | |
222 | { | |
223 | int status; | |
224 | ||
225 | if (pthread_mutex_lock (mut1) != 0) | |
226 | { | |
227 | puts ("parent: 2nd mutex_lock failed"); | |
b910f788 | 228 | return 1; |
76a50749 UD |
229 | } |
230 | ||
231 | if (pthread_mutex_lock (mut2) != 0) | |
232 | { | |
233 | puts ("parent: 3rd mutex_lock failed"); | |
b910f788 | 234 | return 1; |
76a50749 UD |
235 | } |
236 | ||
237 | if (pthread_cond_signal (cond) != 0) | |
238 | { | |
239 | puts ("parent: cond_signal failed"); | |
b910f788 | 240 | return 1; |
76a50749 UD |
241 | } |
242 | ||
243 | *condition = 1; | |
244 | ||
245 | if (pthread_mutex_unlock (mut2) != 0) | |
246 | { | |
247 | puts ("parent: mutex_unlock failed"); | |
b910f788 | 248 | return 1; |
76a50749 UD |
249 | } |
250 | ||
251 | puts ("waiting for child"); | |
252 | ||
253 | waitpid (pid, &status, 0); | |
254 | result |= status; | |
255 | ||
256 | puts ("parent done"); | |
257 | } | |
258 | ||
259 | return result; | |
260 | } | |
b910f788 RM |
261 | |
262 | #define TEST_FUNCTION do_test () | |
263 | #include "../test-skeleton.c" |