malloc/tst-posix_memalign.c

   1 /* Test for posix_memalign.
   2    Copyright (C) 2013 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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.
   9
  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.
  14
  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/>.  */
  18
  19 #include <errno.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 static int errors = 0;
  26
  27 static void
  28 merror (const char *msg)
  29 {
  30   ++errors;
  31   printf ("Error: %s\n", msg);
  32 }
  33
  34 static int
  35 do_test (void)
  36 {
  37   void *p;
  38   int ret;
  39   unsigned long pagesize = getpagesize ();
  40   unsigned long ptrval;
  41
  42   p = NULL;
  43
  44   /* An attempt to allocate a huge value should return ENOMEM and
  45      p should remain NULL.  */
  46   ret = posix_memalign (&p, sizeof (void *), -1);
  47
  48   if (ret != ENOMEM)
  49     merror ("posix_memalign (&p, sizeof (void *), -1) succeeded.");
  50
  51   if (ret == ENOMEM && p != NULL)
  52     merror ("returned an error but pointer was modified");
  53
  54   free (p);
  55
  56   p = NULL;
  57
  58   /* Test to expose integer overflow in malloc internals from BZ #15857.  */
  59   ret = posix_memalign (&p, pagesize, -pagesize);
  60
  61   if (ret != ENOMEM)
  62     merror ("posix_memalign (&p, pagesize, -pagesize) succeeded.");
  63
  64   free (p);
  65
  66   p = NULL;
  67
  68   /* A zero-sized allocation should succeed with glibc, returning zero
  69      and setting p to a non-NULL value.  */
  70   ret = posix_memalign (&p, sizeof (void *), 0);
  71
  72   if (ret != 0 || p == NULL)
  73     merror ("posix_memalign (&p, sizeof (void *), 0) failed.");
  74
  75   free (p);
  76
  77   ret = posix_memalign (&p, 0x300, 10);
  78
  79   if (ret != EINVAL)
  80     merror ("posix_memalign (&p, 0x300, 10) succeeded.");
  81
  82   ret = posix_memalign (&p, 0, 10);
  83
  84   if (ret != EINVAL)
  85     merror ("posix_memalign (&p, 0, 10) succeeded.");
  86
  87   p = NULL;
  88
  89   ret = posix_memalign (&p, 0x100, 10);
  90
  91   if (ret != 0)
  92     merror ("posix_memalign (&p, 0x100, 10) failed.");
  93
  94   if (ret == 0 && p == NULL)
  95     merror ("returned success but pointer is NULL");
  96
  97   ptrval = (unsigned long) p;
  98
  99   if (ret == 0 && (ptrval & 0xff) != 0)
 100     merror ("pointer is not aligned to 0x100");
 101
 102   free (p);
 103
 104   return errors != 0;
 105 }
 106
 107 #define TEST_FUNCTION do_test ()
 108 #include "../test-skeleton.c"