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/* Check if kernel supports set VMA range name.
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <support/check.h>
#include <support/support.h>
#include <support/xunistd.h>
#include <sys/mman.h>
#ifdef __linux__
# include <sys/prctl.h>
#endif
bool
support_set_vma_name_supported (void)
{
#ifdef __linux__
size_t size = sysconf (_SC_PAGESIZE);
if (size == -1)
FAIL_EXIT1 ("sysconf (_SC_PAGESIZE): %m\n");
void *vma = xmmap (0,
size,
PROT_NONE,
MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE,
-1);
int r = prctl (PR_SET_VMA, PR_SET_VMA_ANON_NAME, vma, size, "vmaname");
xmunmap (vma, size);
return r == 0;
#else
return false;
#endif
}
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