sysdeps/x86/tst-memcmp-rtm.c

   1 /* Test case for memcmp inside a transactionally executing RTM region.
   2    Copyright (C) 2021-2023 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 <tst-string-rtm.h>
  20
  21 #define LOOP 3000
  22 #define STRING_SIZE 1024
  23 char string1[STRING_SIZE];
  24 char string2[STRING_SIZE];
  25
  26 __attribute__ ((noinline, noclone))
  27 static int
  28 prepare (void)
  29 {
  30   memset (string1, 'a', STRING_SIZE);
  31   memset (string2, 'a', STRING_SIZE);
  32   if (memcmp (string1, string2, STRING_SIZE) == 0)
  33     return EXIT_SUCCESS;
  34   else
  35     return EXIT_FAILURE;
  36 }
  37
  38 __attribute__ ((noinline, noclone))
  39 static int
  40 function (void)
  41 {
  42   if (memcmp (string1, string2, STRING_SIZE) == 0)
  43     return 0;
  44   else
  45     return 1;
  46 }
  47
  48 static int
  49 do_test (void)
  50 {
  51   return do_test_1 ("memcmp", LOOP, prepare, function);
  52 }