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
139
140
141
142
143
144
145
146
|
/* Copyright (C) 2013-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <malloc.h>
#include <stdio.h>
#include <string.h>
static int errors = 0;
static void
merror (const char *msg)
{
++errors;
printf ("Error: %s\n", msg);
}
static int
do_test (void)
{
void *p;
unsigned char *c;
int save, i, ok;
errno = 0;
/* realloc (NULL, ...) behaves similarly to malloc (C89). */
p = realloc (NULL, -1);
save = errno;
if (p != NULL)
merror ("realloc (NULL, -1) succeeded.");
/* errno should be set to ENOMEM on failure (POSIX). */
if (p == NULL && save != ENOMEM)
merror ("errno is not set correctly");
errno = 0;
/* realloc (NULL, ...) behaves similarly to malloc (C89). */
p = realloc (NULL, 10);
save = errno;
if (p == NULL)
merror ("realloc (NULL, 10) failed.");
/* errno should be clear on success (POSIX). */
if (p != NULL && save != 0)
merror ("errno is set but should not be");
free (p);
p = calloc (20, 1);
if (p == NULL)
merror ("calloc (20, 1) failed.");
/* Check increasing size preserves contents (C89). */
p = realloc (p, 200);
if (p == NULL)
merror ("realloc (p, 200) failed.");
c = p;
ok = 1;
for (i = 0; i < 20; i++)
{
if (c[i] != 0)
ok = 0;
}
if (ok == 0)
merror ("first 20 bytes were not cleared");
free (p);
p = realloc (NULL, 100);
if (p == NULL)
merror ("realloc (NULL, 100) failed.");
memset (p, 0xff, 100);
/* Check decreasing size preserves contents (C89). */
p = realloc (p, 16);
if (p == NULL)
merror ("realloc (p, 16) failed.");
c = p;
ok = 1;
for (i = 0; i < 16; i++)
{
if (c[i] != 0xff)
ok = 0;
}
if (ok == 0)
merror ("first 16 bytes were not correct");
/* Check failed realloc leaves original untouched (C89). */
c = realloc (p, -1);
if (c != NULL)
merror ("realloc (p, -1) succeeded.");
c = p;
ok = 1;
for (i = 0; i < 16; i++)
{
if (c[i] != 0xff)
ok = 0;
}
if (ok == 0)
merror ("first 16 bytes were not correct after failed realloc");
/* realloc (p, 0) frees p (C89) and returns NULL (glibc). */
p = realloc (p, 0);
if (p != NULL)
merror ("realloc (p, 0) returned non-NULL.");
/* realloc (NULL, 0) acts like malloc (0) (glibc). */
p = realloc (NULL, 0);
if (p == NULL)
merror ("realloc (NULL, 0) returned NULL.");
free (p);
return errors != 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
