1  /* Test strncat with size_t in the lower 32 bits of 64-bit register.
       2     Copyright (C) 2022-2023 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  #define TEST_NAME "strncat"
      20  #include "test-size_t.h"
      21  
      22  IMPL (strncat, 1)
      23  
      24  typedef char *(*proto_t) (char *, const char*, size_t);
      25  
      26  static void *
      27  __attribute__ ((noinline, noclone))
      28  do_strncat (parameter_t a, parameter_t b)
      29  {
      30    return CALL (&b, a.p, b.p, a.len);
      31  }
      32  
      33  static int
      34  test_main (void)
      35  {
      36    test_init ();
      37  
      38    parameter_t dest = { { page_size - 1 }, buf1 };
      39    parameter_t src = { { 0 }, buf2 };
      40  
      41    int ret = 0;
      42    FOR_EACH_IMPL (impl, 0)
      43      {
      44        src.fn = impl->fn;
      45        buf1[0] = '\0';
      46        do_strncat (dest, src);
      47        int res = strncmp (dest.p, src.p, dest.len);
      48        if (res)
      49  	{
      50  	  error (0, 0, "Wrong result in function %s: %i != 0",
      51  		 impl->name, res);
      52  	  ret = 1;
      53  	}
      54      }
      55  
      56    return ret ? EXIT_FAILURE : EXIT_SUCCESS;
      57  }
      58  
      59  #include <support/test-driver.c>