1  /* Test case for strncmp 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 <stdint.h>
      20  #include <tst-string-rtm.h>
      21  
      22  #ifdef WIDE
      23  # define CHAR wchar_t
      24  # define MEMSET wmemset
      25  # define STRNCMP wcsncmp
      26  # define TEST_NAME "wcsncmp"
      27  #else /* !WIDE */
      28  # define CHAR char
      29  # define MEMSET memset
      30  # ifndef STRNCMP
      31  #  define STRNCMP strncmp
      32  #  define TEST_NAME "strncmp"
      33  # endif
      34  #endif /* !WIDE */
      35  
      36  
      37  
      38  #define LOOP 3000
      39  #define STRING_SIZE 1024
      40  CHAR string1[STRING_SIZE];
      41  CHAR string2[STRING_SIZE];
      42  
      43  __attribute__ ((noinline, noclone))
      44  static int
      45  prepare (void)
      46  {
      47    MEMSET (string1, 'a', STRING_SIZE - 1);
      48    MEMSET (string2, 'a', STRING_SIZE - 1);
      49    if (STRNCMP (string1, string2, STRING_SIZE) == 0)
      50      return EXIT_SUCCESS;
      51    else
      52      return EXIT_FAILURE;
      53  }
      54  
      55  __attribute__ ((noinline, noclone))
      56  static int
      57  function (void)
      58  {
      59    if (STRNCMP (string1, string2, STRING_SIZE) == 0)
      60      return 0;
      61    else
      62      return 1;
      63  }
      64  
      65  __attribute__ ((noinline, noclone))
      66  static int
      67  function_overflow (void)
      68  {
      69    if (STRNCMP (string1, string2, SIZE_MAX) == 0)
      70      return 0;
      71    else
      72      return 1;
      73  }
      74  
      75  __attribute__ ((noinline, noclone))
      76  static int
      77  function_overflow2 (void)
      78  {
      79    if (STRNCMP (string1, string2, SIZE_MAX >> 4) == 0)
      80      return 0;
      81    else
      82      return 1;
      83  }
      84  
      85  static int
      86  do_test (void)
      87  {
      88    int status = do_test_1 (TEST_NAME, LOOP, prepare, function);
      89    if (status != EXIT_SUCCESS)
      90      return status;
      91    status = do_test_1 (TEST_NAME, LOOP, prepare, function_overflow);
      92    if (status != EXIT_SUCCESS)
      93      return status;
      94    status = do_test_1 (TEST_NAME, LOOP, prepare, function_overflow2);
      95    if (status != EXIT_SUCCESS)
      96      return status;
      97    return status;
      98  }