1  /* Test case for memrchr 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);
      30    string1[100] = 'c';
      31    string1[STRING_SIZE - 100] = 'c';
      32    char *p = memrchr (string1, 'c', STRING_SIZE);
      33    if (p == &string1[STRING_SIZE - 100])
      34      return EXIT_SUCCESS;
      35    else
      36      return EXIT_FAILURE;
      37  }
      38  
      39  __attribute__ ((noinline, noclone))
      40  static int
      41  function (void)
      42  {
      43    char *p = memrchr (string1, 'c', STRING_SIZE);
      44    if (p == &string1[STRING_SIZE - 100])
      45      return 0;
      46    else
      47      return 1;
      48  }
      49  
      50  static int
      51  do_test (void)
      52  {
      53    return do_test_1 ("memrchr", LOOP, prepare, function);
      54  }