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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [gdb/] [testsuite/] [gdb.base/] [sigaltstack.c] - Rev 357
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/* This testcase is part of GDB, the GNU debugger. Copyright 2004, 2007, 2008, 2009, 2010 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 <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/time.h> enum level { MAIN, OUTER, INNER, LEAF, NR_LEVELS }; /* Levels completed flag. */ volatile enum level level = NR_LEVELS; void catcher (int signal); void thrower (enum level next_level, int sig, int itimer, int on_stack) { level = next_level; /* Set up the signal handler. */ { struct sigaction act; memset (&act, 0, sizeof (act)); act.sa_handler = catcher; act.sa_flags |= on_stack; sigaction (sig, &act, NULL); } /* Set up a one-off timer. A timer, rather than SIGSEGV, is used as after a timer handler finishes the interrupted code can safely resume. */ { struct itimerval itime; memset (&itime, 0, sizeof (itime)); itime.it_value.tv_usec = 250 * 1000; setitimer (itimer, &itime, NULL); } /* Wait. */ while (level != LEAF); } void catcher (int signal) { /* Find the next level. */ switch (level) { case MAIN: thrower (OUTER, SIGALRM, ITIMER_REAL, SA_ONSTACK); break; case OUTER: thrower (INNER, SIGVTALRM, ITIMER_VIRTUAL, SA_ONSTACK); break; case INNER: level = LEAF; return; } } main () { /* Set up the altstack. */ { static char stack[SIGSTKSZ * NR_LEVELS]; stack_t alt; memset (&alt, 0, sizeof (alt)); alt.ss_sp = stack; alt.ss_size = SIGSTKSZ; alt.ss_flags = 0; if (sigaltstack (&alt, NULL) < 0) { perror ("sigaltstack"); exit (0); } } level = MAIN; catcher (0); }
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