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/* SPDX-License-Identifier: GPL-2.1+ */
/*
* Copyright (C) 1996-2024 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
*
* This 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.
*
* This 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.
* <https://www.gnu.org/licenses/>.
*/
#ifndef _MCHECK_H
#define _MCHECK_H 1
/*
* Return values for `mprobe': these are the kinds of inconsistencies that
* `mcheck' enables detection of.
*/
enum mcheck_status {
MCHECK_DISABLED = -1, /* Consistency checking is not turned on. */
MCHECK_OK, /* Block is fine. */
MCHECK_FREE, /* Block freed twice. */
MCHECK_HEAD, /* Memory before the block was clobbered. */
MCHECK_TAIL /* Memory after the block was clobbered. */
};
typedef void (*mcheck_abortfunc_t)(enum mcheck_status, const void *p);
int mcheck(mcheck_abortfunc_t func);
/*
* Similar to `mcheck' but performs checks for all block whenever one of
* the memory handling functions is called. This can be very slow.
*/
int mcheck_pedantic(mcheck_abortfunc_t f);
/* Force check of all blocks now. */
void mcheck_check_all(void);
/*
* Check for aberrations in a particular malloc'd block. These are the
* same checks that `mcheck' does, when you free or reallocate a block.
*/
enum mcheck_status mprobe(void *__ptr);
#endif
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