/* Test nan functions stack overflow (bug 16962).

   Copyright (C) 2015-2018 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

   <http://www.gnu.org/licenses/>.  */

#include <math.h>

#include <stdio.h>

#include <string.h>

#include <sys/resource.h>

#include <stdlib.h>

#define STACK_LIM 1048576

#define STRING_SIZE (2 * STACK_LIM)

static int

do_test (void)

{

  int result = 0;

  struct rlimit lim;

  getrlimit (RLIMIT_STACK, &lim);

  lim.rlim_cur = STACK_LIM;

  setrlimit (RLIMIT_STACK, &lim);

  char *nanstr = malloc (STRING_SIZE);

  if (nanstr == NULL)

    {

      puts ("malloc failed, cannot test");

      return 77;

    }

  memset (nanstr, '0', STRING_SIZE - 1);

  nanstr[STRING_SIZE - 1] = 0;

#define NAN_TEST(TYPE, FUNC)			\

  do						\

    {						\

      char *volatile p = nanstr;		\

      volatile TYPE v = FUNC (p);		\

      if (isnan (v))				\

	puts ("PASS: " #FUNC);			\

      else					\

	{					\

	  puts ("FAIL: " #FUNC);		\

	  result = 1;				\

	}					\

    }						\

  while (0)

  NAN_TEST (float, nanf);

  NAN_TEST (double, nan);

  NAN_TEST (long double, nanl);

  return result;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"