|
Packit Service |
3e667e |
/* BZ #24024 strerror and errno test.
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
Copyright (C) 2019 Free Software Foundation, Inc.
|
|
Packit Service |
3e667e |
This file is part of the GNU C Library.
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit Service |
3e667e |
modify it under the terms of the GNU Lesser General Public
|
|
Packit Service |
3e667e |
License as published by the Free Software Foundation; either
|
|
Packit Service |
3e667e |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit Service |
3e667e |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit Service |
3e667e |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit Service |
3e667e |
Lesser General Public License for more details.
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
You should have received a copy of the GNU Lesser General Public
|
|
Packit Service |
3e667e |
License along with the GNU C Library; if not, see
|
|
Packit Service |
3e667e |
<http://www.gnu.org/licenses/>. */
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
#include <dlfcn.h>
|
|
Packit Service |
3e667e |
#include <errno.h>
|
|
Packit Service |
3e667e |
#include <string.h>
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
#include <support/check.h>
|
|
Packit Service |
3e667e |
#include <support/support.h>
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
/* malloc is allowed to change errno to a value different than 0, even when
|
|
Packit Service |
3e667e |
there is no actual error. This happens for example when the memory
|
|
Packit Service |
3e667e |
allocation through sbrk fails. Simulate this by interposing our own
|
|
Packit Service |
3e667e |
malloc implementation which sets errno to ENOMEM and calls the original
|
|
Packit Service |
3e667e |
malloc. */
|
|
Packit Service |
3e667e |
void
|
|
Packit Service |
3e667e |
*malloc (size_t size)
|
|
Packit Service |
3e667e |
{
|
|
Packit Service |
3e667e |
static void *(*real_malloc) (size_t size);
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
if (!real_malloc)
|
|
Packit Service |
3e667e |
real_malloc = dlsym (RTLD_NEXT, "malloc");
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
errno = ENOMEM;
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
return (*real_malloc) (size);
|
|
Packit Service |
3e667e |
}
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
/* strerror must not change the value of errno. Unfortunately due to GCC bug
|
|
Packit Service |
3e667e |
#88576, this happens when -fmath-errno is used. This simple test checks
|
|
Packit Service |
3e667e |
that it doesn't happen. */
|
|
Packit Service |
3e667e |
static int
|
|
Packit Service |
3e667e |
do_test (void)
|
|
Packit Service |
3e667e |
{
|
|
Packit Service |
3e667e |
char *msg;
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
errno = 0;
|
|
Packit Service |
3e667e |
msg = strerror (-3);
|
|
Packit Service |
3e667e |
(void) msg;
|
|
Packit Service |
3e667e |
TEST_COMPARE (errno, 0);
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
return 0;
|
|
Packit Service |
3e667e |
}
|
|
Packit Service |
3e667e |
|
|
Packit Service |
3e667e |
#include <support/test-driver.c>
|