sysdeps/x86/tst-strrchr-rtm.c

   1 /* Test case for strrchr 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
  25 __attribute__ ((noinline, noclone))
  26 static int
  27 prepare (void)
  28 {
  29   memset (string1, 'a', STRING_SIZE - 1);
  30   string1[STRING_SIZE - 100] = 'c';
  31   char *p = strrchr (string1, 'c');
  32   if (p == &string1[STRING_SIZE - 100])
  33     return EXIT_SUCCESS;
  34   else
  35     return EXIT_FAILURE;
  36 }
  37
  38 __attribute__ ((noinline, noclone))
  39 static int
  40 function (void)
  41 {
  42   char *p = strrchr (string1, 'c');
  43   if (p == &string1[STRING_SIZE - 100])
  44     return 0;
  45   else
  46     return 1;
  47 }
  48
  49 static int
  50 do_test (void)
  51 {
  52   return do_test_1 ("strrchr", LOOP, prepare, function);
  53 }