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/* Copyright (C) 1996-2022 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/>. */
#ifndef _MCHECK_H
#define _MCHECK_H 1
#include <features.h>
__BEGIN_DECLS
/* 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. */
};
/* Activate a standard collection of debugging hooks. This must be called
before `malloc' is ever called. ABORTFUNC is called with an error code
(see enum above) when an inconsistency is detected. If ABORTFUNC is
null, the standard function prints on stderr and then calls `abort'. */
extern int mcheck (void (*__abortfunc)(enum mcheck_status)) __THROW;
/* Similar to `mcheck' but performs checks for all block whenever one of
the memory handling functions is called. This can be very slow. */
extern int mcheck_pedantic (void (*__abortfunc)(enum mcheck_status)) __THROW;
/* Force check of all blocks now. */
extern void mcheck_check_all (void);
/* Check for aberrations in a particular malloc'd block. You must have
called `mcheck' already. These are the same checks that `mcheck' does
when you free or reallocate a block. */
extern enum mcheck_status mprobe (void *__ptr) __THROW;
/* Activate a standard collection of tracing hooks. */
extern void mtrace (void) __THROW;
extern void muntrace (void) __THROW;
__END_DECLS
#endif /* mcheck.h */