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/* Test the dispatcher.
Copyright (C) 2002-2006, 2008 Bruno Haible <bruno@clisp.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifndef _MSC_VER
# include <config.h>
#endif
#include "sigsegv.h"
#include <stdio.h>
#if HAVE_SIGSEGV_RECOVERY
#include "mmaputil.h"
#include <stdlib.h>
static sigsegv_dispatcher dispatcher;
static volatile unsigned int logcount = 0;
static volatile unsigned long logdata[10];
static int
area_handler (void *fault_address, void *user_arg)
{
unsigned long area = *(unsigned long *)user_arg;
logdata[logcount++] = area;
if (logcount >= sizeof (logdata) / sizeof (logdata[0]))
abort ();
if (!((unsigned long)fault_address >= area
&& (unsigned long)fault_address - area < 0x4000))
abort ();
if (mprotect ((void *) area, 0x4000, PROT_READ_WRITE) == 0)
return 1;
return 0;
}
static int
handler (void *fault_address, int serious)
{
return sigsegv_dispatch (&dispatcher, fault_address);
}
static void
barrier ()
{
}
int
main ()
{
void *p;
unsigned long area1;
unsigned long area2;
unsigned long area3;
/* Preparations. */
#if !HAVE_MMAP_ANON && !HAVE_MMAP_ANONYMOUS && HAVE_MMAP_DEVZERO
zero_fd = open ("/dev/zero", O_RDONLY, 0644);
#endif
sigsegv_init (&dispatcher);
sigsegv_install_handler (&handler);
/* Setup some mmaped memory. */
p = mmap_zeromap ((void *) 0x12340000, 0x4000);
if (p == (void *)(-1))
{
fprintf (stderr, "mmap_zeromap failed.\n");
exit (2);
}
area1 = (unsigned long) p;
sigsegv_register (&dispatcher, (void *) area1, 0x4000, &area_handler, &area1);
if (mprotect ((void *) area1, 0x4000, PROT_NONE) < 0)
{
fprintf (stderr, "mprotect failed.\n");
exit (2);
}
p = mmap_zeromap ((void *) 0x0BEE0000, 0x4000);
if (p == (void *)(-1))
{
fprintf (stderr, "mmap_zeromap failed.\n");
exit (2);
}
area2 = (unsigned long) p;
sigsegv_register (&dispatcher, (void *) area2, 0x4000, &area_handler, &area2);
if (mprotect ((void *) area2, 0x4000, PROT_READ) < 0)
{
fprintf (stderr, "mprotect failed.\n");
exit (2);
}
if (mprotect ((void *) area2, 0x4000, PROT_READ_WRITE) < 0
|| mprotect ((void *) area2, 0x4000, PROT_READ) < 0)
{
fprintf (stderr, "mprotect failed.\n");
exit (2);
}
p = mmap_zeromap ((void *) 0x06990000, 0x4000);
if (p == (void *)(-1))
{
fprintf (stderr, "mmap_zeromap failed.\n");
exit (2);
}
area3 = (unsigned long) p;
sigsegv_register (&dispatcher, (void *) area3, 0x4000, &area_handler, &area3);
mprotect ((void *) area3, 0x4000, PROT_READ);
/* This access should call the handler. */
((volatile int *)area2)[230] = 22;
/* This access should call the handler. */
((volatile int *)area3)[412] = 33;
/* This access should not give a signal. */
((volatile int *)area2)[135] = 22;
/* This access should call the handler. */
((volatile int *)area1)[612] = 11;
barrier();
/* Check that the handler was called three times. */
if (logcount != 3)
exit (1);
if (!(logdata[0] == area2 && logdata[1] == area3 && logdata[2] == area1))
exit (1);
printf ("Test passed.\n");
return 0;
}
#else
int
main ()
{
return 77;
}
#endif
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