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4bab0224 | 1 | /* Test the mlock2 function. |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
4bab0224 FW |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
4bab0224 FW |
17 | |
18 | #include <errno.h> | |
19 | #include <stdio.h> | |
20 | #include <support/check.h> | |
21 | #include <support/xunistd.h> | |
22 | #include <sys/mman.h> | |
23 | ||
24 | /* Allocate a page using mmap. */ | |
25 | static void * | |
26 | get_page (void) | |
27 | { | |
28 | return xmmap (NULL, 1, PROT_READ | PROT_WRITE, | |
29 | MAP_ANONYMOUS | MAP_PRIVATE, -1); | |
30 | } | |
31 | ||
32 | static int | |
33 | do_test (void) | |
34 | { | |
35 | /* Current kernels have a small reserve of locked memory, so this | |
36 | test does not need any privileges to run. */ | |
37 | ||
38 | void *page = get_page (); | |
39 | if (mlock (page, 1) != 0) | |
40 | FAIL_EXIT1 ("mlock: %m\n"); | |
41 | xmunmap (page, 1); | |
42 | ||
43 | page = get_page (); | |
44 | if (mlock2 (page, 1, 0) != 0) | |
45 | /* Should be implemented using mlock if necessary. */ | |
46 | FAIL_EXIT1 ("mlock2 (0): %m\n"); | |
47 | xmunmap (page, 1); | |
48 | ||
49 | page = get_page (); | |
50 | int ret = mlock2 (page, 1, MLOCK_ONFAULT); | |
51 | if (ret != 0) | |
52 | { | |
53 | TEST_VERIFY (ret == -1); | |
54 | if (errno != EINVAL) | |
55 | /* EINVAL means the system does not support the mlock2 system | |
56 | call. */ | |
57 | FAIL_EXIT1 ("mlock2 (0): %m\n"); | |
58 | else | |
59 | puts ("warning: mlock2 system call not supported"); | |
60 | } | |
61 | xmunmap (page, 1); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | #include <support/test-driver.c> |