/* src/vm/signal.c - machine independent signal functions
- Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
- R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
- C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
- Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
+ C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
+ E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
+ J. Wenninger, Institut f. Computersprachen - TU Wien
This file is part of CACAO.
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., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
- Contact: cacao@complang.tuwien.ac.at
-
- Authors: Christian Thalinger
-
- Changes:
-
- $Id: signal.c 3543 2005-11-03 20:34:57Z twisti $
+ $Id: signal.c 7592 2007-03-28 20:12:33Z twisti $
*/
+#include "config.h"
+
+#include <errno.h>
#include <signal.h>
#include <stdlib.h>
+#include <unistd.h>
+#include <sys/mman.h>
-#include "config.h"
+#if defined(__DARWIN__)
+/* If we compile with -ansi on darwin, <sys/types.h> is not
+ included. So let's do it here. */
+# include <sys/types.h>
+#endif
+
+#include "vm/types.h"
-#include "cacao/cacao.h"
+#include "arch.h"
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-# include "threads/native/threads.h"
+#include "mm/memory.h"
+
+#if defined(ENABLE_THREADS)
+# include "threads/threads-common.h"
#endif
-#include "vm/options.h"
-#include "vm/jit/stacktrace.h"
+#include "vm/signallocal.h"
+#include "vm/vm.h"
+
+#include "vmcore/options.h"
+
+
+/* global variables ***********************************************************/
+
+#if defined(ENABLE_THREADS)
+static threadobject *thread_signal;
+#endif
/* function prototypes ********************************************************/
-void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p);
-void signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p);
-void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
-void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p);
-void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p);
+void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p);
/* signal_init *****************************************************************
void signal_init(void)
{
+#if !defined(__CYGWIN__)
+ int pagesize;
+ sigset_t mask;
struct sigaction act;
- /* install signal handlers we need to convert to exceptions */
+ /* mmap a memory page at address 0x0, so our hardware-exceptions
+ work. */
- sigemptyset(&act.sa_mask);
+ pagesize = getpagesize();
+ (void) memory_mmap_anon(NULL, pagesize, PROT_NONE, MAP_PRIVATE | MAP_FIXED);
-#if defined(ENABLE_JIT)
-# if defined(ENABLE_INTRP)
- if (!opt_intrp) {
-# endif
- /* catch NullPointerException/StackOverFlowException */
+ /* Block the following signals (SIGINT for <ctrl>-c, SIGQUIT for
+ <ctrl>-\). We enable them later in signal_thread, but only for
+ this thread. */
- if (!checknull) {
- act.sa_sigaction = signal_handler_sigsegv;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ if (sigemptyset(&mask) != 0)
+ vm_abort("signal_init: sigemptyset failed: %s", strerror(errno));
-#if defined(SIGSEGV)
- sigaction(SIGSEGV, &act, NULL);
-#endif
+ if (sigaddset(&mask, SIGINT) != 0)
+ vm_abort("signal_init: sigaddset failed: %s", strerror(errno));
-#if defined(SIGBUS)
- sigaction(SIGBUS, &act, NULL);
+#if !defined(__FREEBSD__)
+ if (sigaddset(&mask, SIGQUIT) != 0)
+ vm_abort("signal_init: sigaddset failed: %s", strerror(errno));
#endif
- }
+ if (sigprocmask(SIG_BLOCK, &mask, NULL) != 0)
+ vm_abort("signal_init: sigprocmask failed: %s", strerror(errno));
- /* catch ArithmeticException */
+#if defined(ENABLE_GC_BOEHM)
+ /* Allocate something so the garbage collector's signal handlers
+ are installed. */
-#if defined(__I386__) || defined(__X86_64__)
- act.sa_sigaction = signal_handler_sigfpe;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGFPE, &act, NULL);
+ (void) GCNEW(u1);
#endif
+
+ /* Install signal handlers for signals we want to catch in all
+ threads. */
+
+ sigemptyset(&act.sa_mask);
+
+#if defined(ENABLE_JIT)
# if defined(ENABLE_INTRP)
- }
+ if (!opt_intrp) {
# endif
-#endif /* !defined(__INTRP__) */
+ /* SIGSEGV handler */
+ act.sa_sigaction = md_signal_handler_sigsegv;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
- /* catch SIGINT for exiting properly on <ctrl>-c */
+# if defined(SIGSEGV)
+ sigaction(SIGSEGV, &act, NULL);
+# endif
- act.sa_sigaction = signal_handler_sigint;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGINT, &act, NULL);
+# if defined(SIGBUS)
+ sigaction(SIGBUS, &act, NULL);
+# endif
+# if SUPPORT_HARDWARE_DIVIDE_BY_ZERO
+ /* SIGFPE handler */
+ act.sa_sigaction = md_signal_handler_sigfpe;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ sigaction(SIGFPE, &act, NULL);
+# endif
- /* catch SIGQUIT for thread dump */
+# if defined(__ARM__)
+ /* XXX use better defines for that (in arch.h) */
+ /* SIGILL handler */
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-#if !defined(__FREEBSD__)
- act.sa_sigaction = signal_handler_sigquit;
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGQUIT, &act, NULL);
+ act.sa_sigaction = md_signal_handler_sigill;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ sigaction(SIGILL, &act, NULL);
+# endif
- /* XXX boehm uses SIGUSR1 for suspend on freebsd */
+# if defined(__POWERPC__)
+ /* XXX use better defines for that (in arch.h) */
+ /* SIGTRAP handler */
- act.sa_sigaction = signal_handler_sigusr1;
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGUSR1, &act, NULL);
+ act.sa_sigaction = md_signal_handler_sigtrap;
+ act.sa_flags = SA_NODEFER | SA_SIGINFO;
+ sigaction(SIGTRAP, &act, NULL);
+# endif
+# if defined(ENABLE_INTRP)
+ }
+# endif
+#endif /* !defined(ENABLE_INTRP) */
+
+#if defined(ENABLE_THREADS)
+ /* SIGHUP handler for threads_thread_interrupt */
+
+ act.sa_sigaction = signal_handler_sighup;
+ act.sa_flags = 0;
+ sigaction(SIGHUP, &act, NULL);
#endif
+
+#if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
+ /* SIGUSR2 handler for profiling sampling */
+
+ act.sa_sigaction = md_signal_handler_sigusr2;
+ act.sa_flags = SA_SIGINFO;
+ sigaction(SIGUSR2, &act, NULL);
#endif
+
+#endif /* !defined(__CYGWIN__) */
}
-/* signal_handler_sigquit ******************************************************
+/* signal_thread ************************************************************
- XXX
+ This thread sets the signal mask to catch the user input signals
+ (SIGINT, SIGQUIT). We use such a thread, so we don't get the
+ signals on every single thread running. Especially, this makes
+ problems on slow machines.
*******************************************************************************/
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
+static void signal_thread(void)
{
- /* do thread dump */
+ sigset_t mask;
+ int sig;
- threads_dump();
-}
+ if (sigemptyset(&mask) != 0)
+ vm_abort("signal_thread: sigemptyset failed: %s", strerror(errno));
+
+ sigaddset(&mask, SIGINT);
+#if !defined(__FREEBSD__)
+ sigaddset(&mask, SIGQUIT);
#endif
+ while (true) {
+ /* just wait for a signal */
-/* signal_handler_sigint *******************************************************
+ (void) sigwait(&mask, &sig);
- Handler for SIGINT (<ctrl>-c) which shuts down CACAO properly with
- Runtime.exit(I)V.
+ switch (sig) {
+ case SIGINT:
+ /* exit the vm properly */
-*******************************************************************************/
+ vm_exit(0);
+ break;
-void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
-{
- /* if we are already in Runtime.exit(), just do it hardcore */
+ case SIGQUIT:
+ /* print a thread dump */
+#if defined(ENABLE_THREADS)
+ threads_dump();
+#endif
- if (cacao_exiting) {
- fprintf(stderr, "Catched SIGINT while already shutting down. Shutdown aborted...\n");
- exit(0);
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ statistics_print_memory_usage();
+#endif
+ break;
+ }
}
- /* exit the vm properly */
+ /* this should not happen */
- cacao_exit(0);
+ vm_abort("signal_thread: this thread should not exit!");
}
-/* signal_handler_sigusr1 ******************************************************
+/* signal_start_thread *********************************************************
- XXX
+ Starts the signal handler thread.
*******************************************************************************/
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
+bool signal_start_thread(void)
{
- /* call stacktrace function */
+#if defined(ENABLE_THREADS)
+ utf *name;
- stacktrace_dump_trace();
+ name = utf_new_char("Signal Handler");
+
+ thread_signal = threads_create_thread(name);
+
+ if (thread_signal == NULL)
+ return false;
+
+ /* actually start the signal handler thread */
+
+ threads_start_thread(thread_signal, signal_thread);
+
+ /* everything's ok */
+
+ return true;
+#else
+#warning FIX ME!
+#endif
+}
+
+
+/* signal_handler_sighup *******************************************************
+
+ This handler is required by threads_thread_interrupt and does
+ nothing.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS)
+void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p)
+{
+ /* do nothing */
}
#endif
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