1 /* This testcase is part of GDB, the GNU debugger.
3 Copyright 2004, 2007-2008, 2010-2012 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
30 handler (int sig, siginfo_t *info, void *context)
32 /* Copy to local vars, as the test wants to read them, and si_addr,
33 etc. may be preprocessor defines. */
34 int ssi_errno = info->si_errno;
35 int ssi_signo = info->si_signo;
36 int ssi_code = info->si_code;
37 void *ssi_addr = info->si_addr;
39 _exit (0); /* set breakpoint here */
43 segv_thread (void *ptr)
53 /* Set up unwritable memory. */
56 len = sysconf(_SC_PAGESIZE);
57 p = mmap (0, len, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
64 /* Set up the signal handler. */
66 struct sigaction action;
67 memset (&action, 0, sizeof (action));
68 action.sa_sigaction = handler;
69 action.sa_flags |= SA_SIGINFO;
70 if (sigaction (SIGSEGV, &action, NULL))
77 /* Create a thread that will trigger SIGSEGV. */
78 pthread_create (&thr, NULL, segv_thread, p);
80 pthread_join (thr, NULL);