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/* Test nan functions stack overflow (bug 16962).
Copyright (C) 2015-2024 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/>. */
#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"
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