1 /* This testcase is part of GDB, the GNU debugger.
3 Copyright 2004 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 2 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, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 Please email any bugs, comments, and/or additions to this file to:
20 bug-gdb@prep.ai.mit.edu */
26 enum level { MAIN, OUTER, INNER, LEAF, NR_LEVELS };
28 /* Levels completed flag. */
29 volatile enum level level = NR_LEVELS;
31 void catcher (int signal);
34 thrower (enum level next_level, int sig, int itimer, int on_stack)
37 /* Set up the signal handler. */
40 memset (&act, 0, sizeof (act));
41 act.sa_handler = catcher;
42 act.sa_flags |= on_stack;
43 sigaction (sig, &act, NULL);
45 /* Set up a one-off timer. A timer, rather than SIGSEGV, is used as
46 after a timer handler finishes the interrupted code can safely
49 struct itimerval itime;
50 memset (&itime, 0, sizeof (itime));
51 itime.it_value.tv_usec = 250 * 1000;
52 setitimer (itimer, &itime, NULL);
55 while (level != LEAF);
61 /* Find the next level. */
65 thrower (OUTER, SIGALRM, ITIMER_REAL, SA_ONSTACK);
68 thrower (INNER, SIGVTALRM, ITIMER_VIRTUAL, SA_ONSTACK);
79 /* Set up the altstack. */
81 static char stack[SIGSTKSZ * NR_LEVELS];
82 struct sigaltstack alt;
83 memset (&alt, 0, sizeof (alt));
85 alt.ss_size = SIGSTKSZ;
87 if (sigaltstack (&alt, NULL) < 0)
89 perror ("sigaltstack");