85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/* This testcase is part of GDB, the GNU debugger.
|
|
|
|
Copyright 2004-2015 Free Software Foundation, Inc.
|
|
|
|
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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
|
|
static void *p;
|
|
|
|
static void
|
|
handler (int sig, siginfo_t *info, void *context)
|
|
{
|
|
/* Copy to local vars, as the test wants to read them, and si_addr,
|
|
etc. may be preprocessor defines. */
|
|
int ssi_errno = info->si_errno;
|
|
int ssi_signo = info->si_signo;
|
|
int ssi_code = info->si_code;
|
|
void *ssi_addr = info->si_addr;
|
|
|
|
_exit (0); /* set breakpoint here */
|
|
}
|
|
|
|
static void *
|
|
segv_thread (void *ptr)
|
|
{
|
|
*(int *)ptr = 0;
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
pthread_t thr;
|
|
|
|
/* Set up unwritable memory. */
|
|
{
|
|
size_t len;
|
|
len = sysconf(_SC_PAGESIZE);
|
|
p = mmap (0, len, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
|
|
if (p == MAP_FAILED)
|
|
{
|
|
perror ("mmap");
|
|
return 1;
|
|
}
|
|
}
|
|
/* Set up the signal handler. */
|
|
{
|
|
struct sigaction action;
|
|
memset (&action, 0, sizeof (action));
|
|
action.sa_sigaction = handler;
|
|
action.sa_flags |= SA_SIGINFO;
|
|
if (sigaction (SIGSEGV, &action, NULL))
|
|
{
|
|
perror ("sigaction");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* Create a thread that will trigger SIGSEGV. */
|
|
pthread_create (&thr, NULL, segv_thread, p);
|
|
|
|
pthread_join (thr, NULL);
|
|
|
|
return 0;
|
|
}
|