Fix off-by-one in nscd getservbyport call
[glibc.git] / malloc / tst-memalign.c
blobcf48e7ed1fceb2915502c63360446c3988ec2da4
1 /* Test for memalign.
2 Copyright (C) 2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <errno.h>
20 #include <malloc.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <unistd.h>
25 static int errors = 0;
27 static void
28 merror (const char *msg)
30 ++errors;
31 printf ("Error: %s\n", msg);
34 static int
35 do_test (void)
37 void *p;
38 unsigned long pagesize = getpagesize ();
39 unsigned long ptrval;
40 int save;
42 errno = 0;
44 /* An attempt to allocate a huge value should return NULL and set
45 errno to ENOMEM. */
46 p = memalign (sizeof (void *), -1);
48 save = errno;
50 if (p != NULL)
51 merror ("memalign (sizeof (void *), -1) succeeded.");
53 if (p == NULL && save != ENOMEM)
54 merror ("memalign (sizeof (void *), -1) errno is not set correctly");
56 free (p);
58 errno = 0;
60 /* Test to expose integer overflow in malloc internals from BZ #15857. */
61 p = memalign (pagesize, -pagesize);
63 save = errno;
65 if (p != NULL)
66 merror ("memalign (pagesize, -pagesize) succeeded.");
68 if (p == NULL && save != ENOMEM)
69 merror ("memalign (pagesize, -pagesize) errno is not set correctly");
71 free (p);
73 errno = 0;
75 /* Test to expose integer overflow in malloc internals from BZ #16038. */
76 p = memalign (-1, pagesize);
78 save = errno;
80 if (p != NULL)
81 merror ("memalign (-1, pagesize) succeeded.");
83 if (p == NULL && save != EINVAL)
84 merror ("memalign (-1, pagesize) errno is not set correctly");
86 free (p);
88 /* A zero-sized allocation should succeed with glibc, returning a
89 non-NULL value. */
90 p = memalign (sizeof (void *), 0);
92 if (p == NULL)
93 merror ("memalign (sizeof (void *), 0) failed.");
95 free (p);
97 /* Check the alignment of the returned pointer is correct. */
98 p = memalign (0x100, 10);
100 if (p == NULL)
101 merror ("memalign (0x100, 10) failed.");
103 ptrval = (unsigned long) p;
105 if ((ptrval & 0xff) != 0)
106 merror ("pointer is not aligned to 0x100");
108 free (p);
110 return errors != 0;
113 #define TEST_FUNCTION do_test ()
114 #include "../test-skeleton.c"