mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-15 04:20:28 +08:00
83fd4149ff
Add new testcase elf/tst-startup-errno.c which tests that errno is set to 0 at first ELF constructor execution and at the start of the program's main function. Tested for x86_64 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/* Test the value of errno at program startup.
|
|
Copyright (C) 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 <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
/* Verify that errno is 0 at first ELF constructor execution and at
|
|
the start of main. */
|
|
|
|
static void set_ctor_errno (void) __attribute__((constructor));
|
|
static int ctor_errno = -1;
|
|
|
|
static void
|
|
set_ctor_errno (void)
|
|
{
|
|
ctor_errno = errno;
|
|
}
|
|
|
|
static int
|
|
get_ctor_errno (void)
|
|
{
|
|
return ctor_errno;
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
if (errno != 0)
|
|
{
|
|
printf ("At start of main errno set to %d != 0\n", errno);
|
|
exit (1);
|
|
}
|
|
|
|
if (get_ctor_errno () != 0)
|
|
{
|
|
printf ("At ctor exec errno set to %d != 0\n", get_ctor_errno ());
|
|
exit (1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|