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
27bool
28support_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

source code of glibc/support/support_set_vma_name_supported.c