67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
|
/* BZ #24024 strerror and errno test.
|
||
|
|
|
||
|
|
Copyright (C) 2019-2022 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 <dlfcn.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include <support/check.h>
|
||
|
|
#include <support/support.h>
|
||
|
|
|
||
|
|
/* malloc is allowed to change errno to a value different than 0, even when
|
||
|
|
there is no actual error. This happens for example when the memory
|
||
|
|
allocation through sbrk fails. Simulate this by interposing our own
|
||
|
|
malloc implementation which sets errno to ENOMEM and calls the original
|
||
|
|
malloc. */
|
||
|
|
void
|
||
|
|
*malloc (size_t size)
|
||
|
|
{
|
||
|
|
static void *(*real_malloc) (size_t size);
|
||
|
|
|
||
|
|
if (!real_malloc)
|
||
|
|
real_malloc = dlsym (RTLD_NEXT, "malloc");
|
||
|
|
|
||
|
|
errno = ENOMEM;
|
||
|
|
|
||
|
|
return (*real_malloc) (size);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* strerror must not change the value of errno. Unfortunately due to GCC bug
|
||
|
|
#88576, this happens when -fmath-errno is used. This simple test checks
|
||
|
|
that it doesn't happen. */
|
||
|
|
static int
|
||
|
|
do_test (void)
|
||
|
|
{
|
||
|
|
char *msg;
|
||
|
|
|
||
|
|
errno = 0;
|
||
|
|
msg = strerror (-3);
|
||
|
|
(void) msg;
|
||
|
|
TEST_COMPARE (errno, 0);
|
||
|
|
|
||
|
|
locale_t l = xnewlocale (LC_ALL_MASK, "C", NULL);
|
||
|
|
msg = strerror_l (-3, l);
|
||
|
|
(void) msg;
|
||
|
|
TEST_COMPARE (errno, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#include <support/test-driver.c>
|