1 | /* Check if kernel supports set VMA range name. |
2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
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 |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <support/check.h> |
20 | #include <support/support.h> |
21 | #include <support/xunistd.h> |
22 | #include <sys/mman.h> |
23 | #ifdef __linux__ |
24 | # include <sys/prctl.h> |
25 | #endif |
26 | |
27 | bool |
28 | support_set_vma_name_supported (void) |
29 | { |
30 | #ifdef __linux__ |
31 | size_t size = sysconf (_SC_PAGESIZE); |
32 | if (size == -1) |
33 | FAIL_EXIT1 ("sysconf (_SC_PAGESIZE): %m\n" ); |
34 | |
35 | void *vma = xmmap (addr: 0, |
36 | length: size, |
37 | PROT_NONE, |
38 | MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
39 | fd: -1); |
40 | |
41 | int r = prctl (PR_SET_VMA, PR_SET_VMA_ANON_NAME, vma, size, "vmaname" ); |
42 | |
43 | xmunmap (addr: vma, length: size); |
44 | |
45 | return r == 0; |
46 | #else |
47 | return false; |
48 | #endif |
49 | } |
50 | |