malloc/tst-posix_memalign.c

   1 /* Test for posix_memalign.
   2    Copyright (C) 2013-2019 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   /* Test to expose integer overflow in malloc internals from BZ #16038.  */
  69   ret = posix_memalign (&p, -1, pagesize);
  70
  71   if (ret != EINVAL)
  72     merror ("posix_memalign (&p, -1, pagesize) succeeded.");
  73
  74   free (p);
  75
  76   p = NULL;
  77
  78   /* A zero-sized allocation should succeed with glibc, returning zero
  79      and setting p to a non-NULL value.  */
  80   ret = posix_memalign (&p, sizeof (void *), 0);
  81
  82   if (ret != 0 || p == NULL)
  83     merror ("posix_memalign (&p, sizeof (void *), 0) failed.");
  84
  85   free (p);
  86
  87   ret = posix_memalign (&p, 0x300, 10);
  88
  89   if (ret != EINVAL)
  90     merror ("posix_memalign (&p, 0x300, 10) succeeded.");
  91
  92   ret = posix_memalign (&p, 0, 10);
  93
  94   if (ret != EINVAL)
  95     merror ("posix_memalign (&p, 0, 10) succeeded.");
  96
  97   p = NULL;
  98
  99   ret = posix_memalign (&p, 0x100, 10);
 100
 101   if (ret != 0)
 102     merror ("posix_memalign (&p, 0x100, 10) failed.");
 103
 104   if (ret == 0 && p == NULL)
 105     merror ("returned success but pointer is NULL");
 106
 107   ptrval = (unsigned long) p;
 108
 109   if (ret == 0 && (ptrval & 0xff) != 0)
 110     merror ("pointer is not aligned to 0x100");
 111
 112   free (p);
 113
 114   return errors != 0;
 115 }
 116
 117 #define TEST_FUNCTION do_test ()
 118 #include "../test-skeleton.c"