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
|
/* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <limits.h>
#include <malloc.h>
#include <stdlib.h>
#include <stdio.h>
static int errors = 0;
/* Number of samples per size. */
#define N 50000
static void
fixed_test (int size)
{
char *ptrs[N];
int i;
for (i = 0; i < N; ++i)
{
int j;
ptrs[i] = (char *) calloc (1, size);
if (ptrs[i] == NULL)
break;
for (j = 0; j < size; ++j)
{
if (ptrs[i][j] != '\0') {
++errors;
printf("byte not cleared (size %d, element %d, byte %d)",
size, i, j);
}
ptrs[i][j] = '\xff';
}
}
while (i-- > 0)
free (ptrs[i]);
}
static void
random_test (void)
{
char *ptrs[N];
int i;
for (i = 0; i < N; ++i)
{
int j;
int n = 1 + random () % 10;
int elem = 1 + random () % 100;
int size = n * elem;
ptrs[i] = (char *) calloc (n, elem);
if (ptrs[i] == NULL)
break;
for (j = 0; j < size; ++j)
{
if (ptrs[i][j] != '\0') {
++errors;
printf("byte not cleared (size %d, element %d, byte %d)",
size, i, j);
}
ptrs[i][j] = '\xff';
}
}
while (i-- > 0)
free (ptrs[i]);
}
static void
null_test (void)
{
/* If the size is 0 the result is implementation defined. Just make
sure the program doesn't crash. */
calloc (0, 0);
calloc (0, UINT_MAX);
calloc (UINT_MAX, 0);
calloc (0, ~((size_t) 0));
calloc (~((size_t) 0), 0);
}
int
main (void)
{
/* We are allocating blocks with `calloc' and check whether every
block is completely cleared. We first try this for some fixed
times and then with random size. */
fixed_test (15);
fixed_test (5);
fixed_test (17);
fixed_test (6);
fixed_test (31);
fixed_test (96);
random_test ();
null_test ();
return errors != 0;
}
|
