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

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