1 /*
2 +----------------------------------------------------------------------+
3 | This source file is subject to version 2.00 of the Zend license, |
4 | that is bundled with this package in the file LICENSE, and is |
5 | available through the world-wide-web at the following url: |
6 | http://www.zend.com/license/2_00.txt. |
7 | If you did not receive a copy of the Zend license and are unable to |
8 | obtain it through the world-wide-web, please send a note to |
9 | license@zend.com so we can mail you a copy immediately. |
10 +----------------------------------------------------------------------+
11 | Authors: Max Kellermann <max.kellermann@ionos.com> |
12 +----------------------------------------------------------------------+
13 */
14
15 #ifndef ZEND_MMAP_H
16 #define ZEND_MMAP_H
17
18 #include "zend_portability.h"
19
20 #ifdef HAVE_PRCTL
21 # include <sys/prctl.h>
22
23 /* fallback definitions if our libc is older than the kernel */
24 # ifndef PR_SET_VMA
25 # define PR_SET_VMA 0x53564d41
26 # endif
27 # ifndef PR_SET_VMA_ANON_NAME
28 # define PR_SET_VMA_ANON_NAME 0
29 # endif
30 #endif // HAVE_PRCTL
31
32 /**
33 * Set a name for the specified memory area.
34 *
35 * This feature requires Linux 5.17.
36 */
zend_mmap_set_name(const void * start,size_t len,const char * name)37 static zend_always_inline void zend_mmap_set_name(const void *start, size_t len, const char *name)
38 {
39 #ifdef HAVE_PRCTL
40 prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (unsigned long)start, len, (unsigned long)name);
41 #endif
42 }
43
44 #endif /* ZEND_MMAP_H */
45
