summary refs log tree commit diff
path: root/malloc/tst-memalign.c
blob: 665061014399a5fc06b60430e5eb14bb02ca61e2 (plain) (blame)
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
/* Test for memalign.
   Copyright (C) 2013-2016 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>
#include <unistd.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 long pagesize = getpagesize ();
  unsigned long ptrval;
  int save;

  errno = 0;

  /* An attempt to allocate a huge value should return NULL and set
     errno to ENOMEM.  */
  p = memalign (sizeof (void *), -1);

  save = errno;

  if (p != NULL)
    merror ("memalign (sizeof (void *), -1) succeeded.");

  if (p == NULL && save != ENOMEM)
    merror ("memalign (sizeof (void *), -1) errno is not set correctly");

  free (p);

  errno = 0;

  /* Test to expose integer overflow in malloc internals from BZ #15857.  */
  p = memalign (pagesize, -pagesize);

  save = errno;

  if (p != NULL)
    merror ("memalign (pagesize, -pagesize) succeeded.");

  if (p == NULL && save != ENOMEM)
    merror ("memalign (pagesize, -pagesize) errno is not set correctly");

  free (p);

  errno = 0;

  /* Test to expose integer overflow in malloc internals from BZ #16038.  */
  p = memalign (-1, pagesize);

  save = errno;

  if (p != NULL)
    merror ("memalign (-1, pagesize) succeeded.");

  if (p == NULL && save != EINVAL)
    merror ("memalign (-1, pagesize) errno is not set correctly");

  free (p);

  /* A zero-sized allocation should succeed with glibc, returning a
     non-NULL value.  */
  p = memalign (sizeof (void *), 0);

  if (p == NULL)
    merror ("memalign (sizeof (void *), 0) failed.");

  free (p);

  /* Check the alignment of the returned pointer is correct.  */
  p = memalign (0x100, 10);

  if (p == NULL)
    merror ("memalign (0x100, 10) failed.");

  ptrval = (unsigned long) p;

  if ((ptrval & 0xff) != 0)
    merror ("pointer is not aligned to 0x100");

  free (p);

  return errors != 0;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"