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fbc99492 | 1 | /* Test for shm_open cancellation handling: BZ #18243. |
d614a753 | 2 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
fbc99492 AZ |
3 | This file is part of the GNU C Library. |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
fbc99492 AZ |
18 | |
19 | #include <pthread.h> | |
20 | #include <sys/mman.h> | |
21 | #include <semaphore.h> | |
22 | #include <stdio.h> | |
23 | #include <fcntl.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <stdlib.h> | |
27 | ||
28 | static sem_t sem; /* Use to sync with thread start. */ | |
29 | static const char shm_name[] = "/glibc-shm_open-cancel"; | |
30 | ||
31 | static void | |
32 | remove_shm (int status, void *arg) | |
33 | { | |
34 | shm_unlink (shm_name); | |
35 | } | |
36 | ||
37 | static void * | |
38 | tf (void *arg) | |
39 | { | |
40 | pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0); | |
41 | ||
42 | if (sem_wait (&sem) != 0) | |
43 | { | |
44 | printf ("error: sem_wait failed: %m"); | |
45 | exit (1); | |
46 | } | |
47 | ||
48 | if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0) != 0) | |
49 | { | |
50 | printf ("error: pthread_setcancelstate failed: %m"); | |
51 | exit (1); | |
52 | } | |
53 | ||
54 | /* Neither sem_unlink or sem_open should act on thread cancellation. */ | |
55 | shm_unlink (shm_name); | |
56 | on_exit (remove_shm, NULL); | |
57 | ||
58 | int fd = shm_open (shm_name, O_CREAT, 0600); | |
59 | if (fd == -1) | |
60 | { | |
61 | int exit_code; | |
62 | if (errno == ENOSYS || errno == EACCES) | |
63 | exit_code = 77; | |
64 | else | |
65 | exit_code = 1; | |
66 | exit (exit_code); | |
67 | } | |
68 | ||
69 | if (pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0) != 0) | |
70 | { | |
71 | printf ("error: pthread_setcancelstate failed: %m"); | |
72 | exit (1); | |
73 | } | |
74 | ||
75 | if (close (fd) != 0) | |
76 | { | |
77 | printf ("error: pthread_setcancelstate failed: %m"); | |
78 | exit (1); | |
79 | } | |
80 | ||
81 | return NULL; | |
82 | } | |
83 | ||
84 | static int | |
85 | do_test (void) | |
86 | { | |
87 | pthread_t td; | |
88 | ||
89 | if (sem_init (&sem, 0, 0)) | |
90 | { | |
91 | printf ("error: sem_init failed: %m\n"); | |
92 | exit (1); | |
93 | } | |
94 | ||
95 | if (pthread_create (&td, NULL, tf, NULL) != 0) | |
96 | { | |
97 | printf ("error: pthread_create failed: %m\n"); | |
98 | exit (1); | |
99 | } | |
100 | ||
101 | if (pthread_cancel (td) != 0) | |
102 | { | |
103 | printf ("error: pthread_cancel failed: %m\n"); | |
104 | exit (1); | |
105 | } | |
106 | ||
107 | if (sem_post (&sem) != 0) | |
108 | { | |
109 | printf ("error: sem_post failed: %m\n"); | |
110 | exit (1); | |
111 | } | |
112 | ||
113 | void *r; | |
114 | if (pthread_join (td, &r) != 0) | |
115 | { | |
116 | printf ("error: pthread_join failed: %m\n"); | |
117 | exit (1); | |
118 | } | |
119 | ||
120 | if (r == PTHREAD_CANCELED) | |
121 | { | |
122 | puts ("error: pthread_join returned PTHREAD_CANCELED"); | |
123 | exit (1); | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | #define TEST_FUNCTION do_test () | |
130 | #include <test-skeleton.c> |