mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 19:00:09 +00:00
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Test printf with x86-specific non-normal long double value.
|
|
Copyright (C) 2020-2024 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 <stdio.h>
|
|
#include <string.h>
|
|
#include <support/check.h>
|
|
|
|
/* Fill the stack with non-zero values. This makes a crash in
|
|
snprintf more likely. */
|
|
static void __attribute__ ((noinline, noclone))
|
|
fill_stack (void)
|
|
{
|
|
char buffer[65536];
|
|
memset (buffer, 0xc0, sizeof (buffer));
|
|
asm ("" ::: "memory");
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
fill_stack ();
|
|
|
|
long double value;
|
|
memcpy (&value, "\x00\x04\x00\x00\x00\x00\x00\x00\x00\x04", 10);
|
|
|
|
char buf[30];
|
|
int ret = snprintf (buf, sizeof (buf), "%Lg", value);
|
|
TEST_COMPARE (ret, strlen (buf));
|
|
TEST_COMPARE_STRING (buf, "nan");
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|