The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/vm/memguard.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2005,
    5  *     Bosko Milekic <bmilekic@FreeBSD.org>.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/12.0/sys/vm/memguard.h 326272 2017-11-27 15:23:17Z pfg $
   29  */
   30 
   31 #ifndef _VM_MEMGUARD_H_
   32 #define _VM_MEMGUARD_H_
   33 
   34 #include "opt_vm.h"
   35 
   36 struct malloc_type;
   37 struct vm_map;
   38 struct vmem;
   39 
   40 #ifdef DEBUG_MEMGUARD
   41 unsigned long   memguard_fudge(unsigned long, const struct vm_map *);
   42 void    memguard_init(struct vmem *);
   43 void    *memguard_alloc(unsigned long, int);
   44 void    *memguard_realloc(void *, unsigned long, struct malloc_type *, int);
   45 void    memguard_free(void *);
   46 int     memguard_cmp_mtp(struct malloc_type *, unsigned long);
   47 int     memguard_cmp_zone(uma_zone_t);
   48 int     is_memguard_addr(void *);
   49 #else
   50 #define memguard_fudge(size, xxx)       (size)
   51 #define memguard_init(map)              do { } while (0)
   52 #define memguard_alloc(size, flags)     NULL
   53 #define memguard_realloc(a, s, mtp, f)  NULL
   54 #define memguard_free(addr)             do { } while (0)
   55 #define memguard_cmp_mtp(mtp, size)     0
   56 #define memguard_cmp_zone(zone)         0
   57 #define is_memguard_addr(addr)          0
   58 #endif
   59 
   60 #endif /* _VM_MEMGUARD_H_ */

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