1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/* Memory allocation routines.
Copyright 1991, 1993, 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h> /* for malloc, realloc, free */
#include "gmp.h"
#include "gmp-impl.h"
void * (*__gmp_allocate_func) _PROTO ((size_t)) = __gmp_default_allocate;
void * (*__gmp_reallocate_func) _PROTO ((void *, size_t, size_t))
= __gmp_default_reallocate;
void (*__gmp_free_func) _PROTO ((void *, size_t)) = __gmp_default_free;
/* Default allocation functions. In case of failure to allocate/reallocate
an error message is written to stderr and the program aborts. */
void *
__gmp_default_allocate (size_t size)
{
void *ret;
#ifdef DEBUG
size_t req_size = size;
size += 2 * BYTES_PER_MP_LIMB;
#endif
ret = malloc (size);
if (ret == 0)
{
fprintf (stderr, "GNU MP: Cannot allocate memory (size=%u)\n", size);
abort ();
}
#ifdef DEBUG
{
mp_ptr p = ret;
p++;
p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
if (req_size % BYTES_PER_MP_LIMB == 0)
p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
ret = p;
}
#endif
return ret;
}
void *
__gmp_default_reallocate (void *oldptr, size_t old_size, size_t new_size)
{
void *ret;
#ifdef DEBUG
size_t req_size = new_size;
if (old_size != 0)
{
mp_ptr p = oldptr;
if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
{
fprintf (stderr, "gmp: (realloc) data clobbered before allocation block\n");
abort ();
}
if (old_size % BYTES_PER_MP_LIMB == 0)
if (p[old_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
{
fprintf (stderr, "gmp: (realloc) data clobbered after allocation block\n");
abort ();
}
oldptr = p - 1;
}
new_size += 2 * BYTES_PER_MP_LIMB;
#endif
ret = realloc (oldptr, new_size);
if (ret == 0)
{
fprintf (stderr, "GNU MP: Cannot reallocate memory (old_size=%u new_size=%u)\n", old_size, new_size);
abort ();
}
#ifdef DEBUG
{
mp_ptr p = ret;
p++;
p[-1] = (0xdeadbeef << 31) + 0xdeafdeed;
if (req_size % BYTES_PER_MP_LIMB == 0)
p[req_size / BYTES_PER_MP_LIMB] = ~((0xdeadbeef << 31) + 0xdeafdeed);
ret = p;
}
#endif
return ret;
}
void
__gmp_default_free (void *blk_ptr, size_t blk_size)
{
#ifdef DEBUG
{
mp_ptr p = blk_ptr;
if (blk_size != 0)
{
if (p[-1] != (0xdeadbeef << 31) + 0xdeafdeed)
{
fprintf (stderr, "gmp: (free) data clobbered before allocation block\n");
abort ();
}
if (blk_size % BYTES_PER_MP_LIMB == 0)
if (p[blk_size / BYTES_PER_MP_LIMB] != ~((0xdeadbeef << 31) + 0xdeafdeed))
{
fprintf (stderr, "gmp: (free) data clobbered after allocation block\n");
abort ();
}
}
blk_ptr = p - 1;
}
#endif
free (blk_ptr);
}
|
