mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* Test of sigaltstack wrappers.
|
|
Copyright (C) 2019-2020 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 <support/xsignal.h>
|
|
#include <support/support.h>
|
|
#include <support/xunistd.h>
|
|
#include <support/check.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
static volatile uintptr_t handler_stackaddr;
|
|
|
|
static void
|
|
handler (int unused)
|
|
{
|
|
int var;
|
|
handler_stackaddr = (uintptr_t) &var;
|
|
}
|
|
|
|
int
|
|
do_test (void)
|
|
{
|
|
void *sstk = xalloc_sigstack (0);
|
|
|
|
unsigned char *sp;
|
|
size_t size;
|
|
xget_sigstack_location (sstk, &sp, &size);
|
|
printf ("signal stack installed: sp=%p size=%zu\n", sp, size);
|
|
|
|
struct sigaction sa;
|
|
sa.sa_handler = handler;
|
|
sa.sa_flags = SA_RESTART | SA_ONSTACK;
|
|
sigfillset (&sa.sa_mask);
|
|
if (sigaction (SIGUSR1, &sa, 0))
|
|
FAIL_RET ("sigaction (SIGUSR1, handler): %m\n");
|
|
|
|
raise (SIGUSR1);
|
|
|
|
uintptr_t haddr = handler_stackaddr;
|
|
printf ("address of handler local variable: %p\n", (void *)haddr);
|
|
TEST_VERIFY ((uintptr_t)sp < haddr);
|
|
TEST_VERIFY (haddr < (uintptr_t)sp + size);
|
|
|
|
xfree_sigstack (sstk);
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|