libbounds/bounds-oob.h

   1 /* Out-of-bounds pointer representation for libbounds.
   2    Copyright (C) 2007, 2008 Free Software Foundation, Inc.
   3    Contributed by Alexander Lamaison <awl03@doc.ic.ac.uk>.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  22 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  23 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  24 for more details.
  25
  26 You should have received a copy of the GNU General Public License
  27 along with GCC; see the file COPYING.  If not, write to the Free
  28 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  29 02110-1301, USA.  */
  30
  31 #ifndef _BOUNDS_OOB_H
  32 #define _BOUNDS_OOB_H
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38 #ifdef HAVE_STDINT_H
  39 #include <stdint.h>
  40 #else
  41 typedef unsigned int uintptr_t __attribute__ ((__mode__ (__pointer__)));
  42 #endif
  43
  44 /* Out-of-bounds object.  */
  45 typedef struct __bounds_oob_ptr
  46 {
  47   uintptr_t ptr;                /* Current pointer value. */
  48   uintptr_t last_valid;         /* Value of pointer before going out-of-bounds.  */
  49   const char *arith_location;   /* Location where pointer went out-of-bounds.  */
  50
  51 } __bounds_oob_ptr_t;
  52
  53 extern void *__bounds_create_oob (void *, void *, const char *);
  54 extern void __bounds_destroy_oob (void *);
  55 extern __bounds_oob_ptr_t *__bounds_get_oob (void *);
  56
  57 #endif /* _BOUNDS_OOB_H */
  58