glibc/sysdeps/x86_64/x32/tst-size_t-strncat.c

/* Test strncat with size_t in the lower 32 bits of 64-bit register.
   Copyright (C) 2022-2024 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#define TEST_NAME "strncat"
#include "test-size_t.h"

IMPL (strncat, 1)

typedef char *(*proto_t) (char *, const char*, size_t);

static void *
__attribute__ ((noinline, noclone))
do_strncat (parameter_t a, parameter_t b)
{
  return CALL (&b, a.p, b.p, a.len);
}

static int
test_main (void)
{
  test_init ();

  parameter_t dest = { { page_size - 1 }, buf1 };
  parameter_t src = { { 0 }, buf2 };

  int ret = 0;
  FOR_EACH_IMPL (impl, 0)
    {
      src.fn = impl->fn;
      buf1[0] = '\0';
      do_strncat (dest, src);
      int res = strncmp (dest.p, src.p, dest.len);
      if (res)
	{
	  error (0, 0, "Wrong result in function %s: %i != 0",
		 impl->name, res);
	  ret = 1;
	}
    }

  return ret ? EXIT_FAILURE : EXIT_SUCCESS;
}

#include <support/test-driver.c>