malloc/tst-mallocalign1.c

   1 /* Verify that MALLOC_ALIGNMENT is honored by malloc.
   2    Copyright (C) 2012-2024 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <inttypes.h>
  22 #include <malloc-size.h>
  23 #include <support/check.h>
  24
  25 static void *
  26 test (size_t s)
  27 {
  28   void *p = malloc (s);
  29
  30   printf ("malloc: %zu, %p: %zu\n", s, p,
  31           ((uintptr_t) p) & MALLOC_ALIGN_MASK);
  32   return p;
  33 }
  34
  35 #define ALIGNED(p) (((uintptr_t) p & MALLOC_ALIGN_MASK) == 0)
  36
  37 static int
  38 do_test (void)
  39 {
  40   void *p;
  41
  42   p = test (2);
  43   TEST_VERIFY (ALIGNED (p));
  44   free (p);
  45
  46   p = test (8);
  47   TEST_VERIFY (ALIGNED (p));
  48   free (p);
  49
  50   p = test (13);
  51   TEST_VERIFY (ALIGNED (p));
  52   free (p);
  53
  54   p = test (16);
  55   TEST_VERIFY (ALIGNED (p));
  56   free (p);
  57
  58   p = test (23);
  59   TEST_VERIFY (ALIGNED (p));
  60   free (p);
  61
  62   p = test (43);
  63   TEST_VERIFY (ALIGNED (p));
  64   free (p);
  65
  66   p = test (123);
  67   TEST_VERIFY (ALIGNED (p));
  68   free (p);
  69
  70   return 0;
  71 }
  72
  73 #include <support/test-driver.c>