mirror of git://sourceware.org/git/glibc.git
50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/* Check if kernel supports set VMA range name.
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xunistd.h>
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#include <sys/mman.h>
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#ifdef __linux__
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# include <sys/prctl.h>
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#endif
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bool
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support_set_vma_name_supported (void)
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{
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#ifdef __linux__
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size_t size = sysconf (_SC_PAGESIZE);
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if (size == -1)
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FAIL_EXIT1 ("sysconf (_SC_PAGESIZE): %m\n");
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void *vma = xmmap (NULL,
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size,
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PROT_NONE,
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MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE,
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-1);
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int r = prctl (PR_SET_VMA, PR_SET_VMA_ANON_NAME, vma, size, "vmaname");
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xmunmap (vma, size);
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return r == 0;
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#else
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return false;
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#endif
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}
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