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49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* Memory allocation next to an unmapped page.
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Copyright (C) 2017-2020 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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#ifndef SUPPORT_NEXT_TO_FAULT_H
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#define SUPPORT_NEXT_TO_FAULT_H
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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/* The memory region created by next_to_fault_allocate. */
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struct support_next_to_fault
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{
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/* The user data. */
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char *buffer;
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size_t length;
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/* The entire allocated region. */
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void *region_start;
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size_t region_size;
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};
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/* Allocate a buffer of SIZE bytes just before a page which is mapped
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with PROT_NONE (so that overrunning the buffer will cause a
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fault). */
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struct support_next_to_fault support_next_to_fault_allocate (size_t size);
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/* Deallocate the memory region allocated by
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next_to_fault_allocate. */
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void support_next_to_fault_free (struct support_next_to_fault *);
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#endif /* SUPPORT_NEXT_TO_FAULT_H */
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