/* 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.
-
- Contact: cacao@complang.tuwien.ac.at
-
- Authors: Christian Thalinger
-
- Changes:
-
- $Id: signal.c 3729 2005-11-22 11:38:12Z twisti $
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
*/
+#include "config.h"
+
+#include <assert.h>
+#include <errno.h>
#include <signal.h>
+#include <stdint.h>
#include <stdlib.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 "arch.h"
-#include "cacao/cacao.h"
+#include "mm/memory.h"
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-# include "threads/native/threads.h"
+#if defined(ENABLE_THREADS)
+# include "threads/threads-common.h"
+#else
+# include "threads/none/threads.h"
#endif
-#include "vm/options.h"
-#include "vm/jit/stacktrace.h"
+#include "toolbox/logging.h"
+
+#include "vm/exceptions.h"
+#include "vm/signallocal.h"
+#include "vm/vm.h"
+
+#include "vm/jit/codegen-common.h"
+#include "vm/jit/disass.h"
+#include "vm/jit/patcher-common.h"
+
+#include "vmcore/options.h"
+
+#if defined(ENABLE_STATISTICS)
+# include "vmcore/statistics.h"
+#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)
+bool signal_init(void)
{
- struct sigaction act;
+#if !defined(__CYGWIN__)
+ sigset_t mask;
+
+#if defined(__LINUX__) && defined(ENABLE_THREADS)
+ /* XXX Remove for exact-GC. */
+ if (threads_pthreads_implementation_nptl) {
+#endif
+
+ /* Block the following signals (SIGINT for <ctrl>-c, SIGQUIT for
+ <ctrl>-\). We enable them later in signal_thread, but only for
+ this thread. */
+
+ if (sigemptyset(&mask) != 0)
+ vm_abort("signal_init: sigemptyset failed: %s", strerror(errno));
+
+#if !defined(WITH_CLASSPATH_SUN)
+ /* Let OpenJDK handle SIGINT itself. */
+
+ if (sigaddset(&mask, SIGINT) != 0)
+ vm_abort("signal_init: sigaddset failed: %s", strerror(errno));
+#endif
+
+#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));
- /* install signal handlers we need to convert to exceptions */
+#if defined(__LINUX__) && defined(ENABLE_THREADS)
+ /* XXX Remove for exact-GC. */
+ }
+#endif
- sigemptyset(&act.sa_mask);
+#if defined(ENABLE_GC_BOEHM)
+ /* Allocate something so the garbage collector's signal handlers
+ are installed. */
+
+ (void) GCNEW(int);
+#endif
+ /* Install signal handlers for signals we want to catch in all
+ threads. */
#if defined(ENABLE_JIT)
# if defined(ENABLE_INTRP)
if (!opt_intrp) {
# endif
- /* catch NullPointerException/StackOverFlowException */
+ /* SIGSEGV handler */
+
+ signal_register_signal(SIGSEGV, (functionptr) md_signal_handler_sigsegv,
+ SA_NODEFER | SA_SIGINFO);
+
+# if defined(SIGBUS)
+ signal_register_signal(SIGBUS, (functionptr) md_signal_handler_sigsegv,
+ SA_NODEFER | SA_SIGINFO);
+# endif
+
+# if SUPPORT_HARDWARE_DIVIDE_BY_ZERO
+ /* SIGFPE handler */
+
+ signal_register_signal(SIGFPE, (functionptr) md_signal_handler_sigfpe,
+ SA_NODEFER | SA_SIGINFO);
+# endif
+
+# if defined(__ARM__) || defined(__S390__)
+ /* XXX use better defines for that (in arch.h) */
+ /* SIGILL handler */
+
+ signal_register_signal(SIGILL, (functionptr) md_signal_handler_sigill,
+ SA_NODEFER | SA_SIGINFO);
+# endif
+
+# if defined(__POWERPC__)
+ /* XXX use better defines for that (in arch.h) */
+ /* SIGTRAP handler */
+
+ signal_register_signal(SIGTRAP, (functionptr) md_signal_handler_sigtrap,
+ SA_NODEFER | SA_SIGINFO);
+# endif
+# if defined(ENABLE_INTRP)
+ }
+# endif
+#endif /* !defined(ENABLE_INTRP) */
- if (!checknull) {
- act.sa_sigaction = signal_handler_sigsegv;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
+#if defined(ENABLE_THREADS)
+ /* SIGHUP handler for threads_thread_interrupt */
-#if defined(SIGSEGV)
- sigaction(SIGSEGV, &act, NULL);
+ signal_register_signal(SIGHUP, (functionptr) signal_handler_sighup, 0);
#endif
-#if defined(SIGBUS)
- sigaction(SIGBUS, &act, NULL);
+#if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
+ /* SIGUSR2 handler for profiling sampling */
+
+ signal_register_signal(SIGUSR2, (functionptr) md_signal_handler_sigusr2,
+ SA_SIGINFO);
#endif
+
+#endif /* !defined(__CYGWIN__) */
+
+ return true;
+}
+
+
+/* signal_register_signal ******************************************************
+
+ Register the specified handler with the specified signal.
+
+*******************************************************************************/
+
+void signal_register_signal(int signum, functionptr handler, int flags)
+{
+ struct sigaction act;
+
+ void (*function)(int, siginfo_t *, void *);
+
+ function = (void (*)(int, siginfo_t *, void *)) handler;
+
+ if (sigemptyset(&act.sa_mask) != 0)
+ vm_abort("signal_register_signal: sigemptyset failed: %s",
+ strerror(errno));
+
+ act.sa_sigaction = function;
+ act.sa_flags = flags;
+
+ if (sigaction(signum, &act, NULL) != 0)
+ vm_abort("signal_register_signal: sigaction failed: %s",
+ strerror(errno));
+}
+
+
+/* signal_handle ***************************************************************
+
+ Handles the signal caught by a signal handler and calls the correct
+ function.
+
+*******************************************************************************/
+
+void *signal_handle(void *xpc, int type, intptr_t val)
+{
+ void *p;
+ int32_t index;
+ java_object_t *o;
+
+ switch (type) {
+ case EXCEPTION_HARDWARE_NULLPOINTER:
+ p = exceptions_new_nullpointerexception();
+ break;
+
+ case EXCEPTION_HARDWARE_ARITHMETIC:
+ p = exceptions_new_arithmeticexception();
+ break;
+
+ case EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS:
+ index = (s4) val;
+ p = exceptions_new_arrayindexoutofboundsexception(index);
+ break;
+
+ case EXCEPTION_HARDWARE_CLASSCAST:
+ o = (java_object_t *) val;
+ p = exceptions_new_classcastexception(o);
+ break;
+
+ case EXCEPTION_HARDWARE_EXCEPTION:
+ p = exceptions_fillinstacktrace();
+ break;
+
+ case EXCEPTION_HARDWARE_PATCHER:
+#if defined(ENABLE_REPLACEMENT)
+ if (replace_me_wrapper(xpc)) {
+ p = NULL;
+ break;
}
+#endif
+ p = patcher_handler(xpc);
+ break;
+
+ default:
+ /* Let's try to get a backtrace. */
+ codegen_get_pv_from_pc(xpc);
- /* catch ArithmeticException */
+ /* If that does not work, print more debug info. */
-#if defined(__I386__) || defined(__X86_64__)
- act.sa_sigaction = signal_handler_sigfpe;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGFPE, &act, NULL);
+ log_println("exceptions_new_hardware_exception: unknown exception type %d", type);
+
+#if SIZEOF_VOID_P == 8
+ log_println("PC=0x%016lx", xpc);
+#else
+ log_println("PC=0x%08x", xpc);
#endif
-# if defined(ENABLE_INTRP)
+
+#if defined(ENABLE_DISASSEMBLER)
+ log_println("machine instruction at PC:");
+ disassinstr(xpc);
+#endif
+
+ vm_abort("Exiting...");
+
+ /* keep compiler happy */
+
+ p = NULL;
}
-# endif
-#endif /* !defined(ENABLE_INTRP) */
+
+ return p;
+}
- /* catch SIGINT for exiting properly on <ctrl>-c */
+/* signal_thread ************************************************************
- act.sa_sigaction = signal_handler_sigint;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
- sigaction(SIGINT, &act, NULL);
+ 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.
+*******************************************************************************/
+static void signal_thread(void)
+{
+ threadobject *t;
+ sigset_t mask;
+ int sig;
- /* catch SIGQUIT for thread dump */
+ t = THREADOBJECT;
+
+ if (sigemptyset(&mask) != 0)
+ vm_abort("signal_thread: sigemptyset failed: %s", strerror(errno));
+
+#if !defined(WITH_CLASSPATH_SUN)
+ /* Let OpenJDK handle SIGINT itself. */
+
+ if (sigaddset(&mask, SIGINT) != 0)
+ vm_abort("signal_thread: sigaddset failed: %s", strerror(errno));
+#endif
-#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);
+ if (sigaddset(&mask, SIGQUIT) != 0)
+ vm_abort("signal_thread: sigaddset failed: %s", strerror(errno));
+#endif
- /* XXX boehm uses SIGUSR1 for suspend on freebsd */
+ for (;;) {
+ /* just wait for a signal */
- act.sa_sigaction = signal_handler_sigusr1;
- act.sa_flags = SA_SIGINFO;
- sigaction(SIGUSR1, &act, NULL);
+#if defined(ENABLE_THREADS)
+ threads_thread_state_waiting(t);
#endif
+
+ /* XXX We don't check for an error here, although the man-page
+ states sigwait does not return an error (which is wrong!),
+ but it seems to make problems with Boehm-GC. We should
+ revisit this code with our new exact-GC. */
+
+/* if (sigwait(&mask, &sig) != 0) */
+/* vm_abort("signal_thread: sigwait failed: %s", strerror(errno)); */
+ (void) sigwait(&mask, &sig);
+
+#if defined(ENABLE_THREADS)
+ threads_thread_state_runnable(t);
#endif
+
+ /* Handle the signal. */
+
+ signal_thread_handler(sig);
+ }
}
-/* signal_handler_sigquit ******************************************************
+/* signal_thread_handler *******************************************************
- XXX
+ Handles the signals caught in the signal handler thread. Also used
+ from sun.misc.Signal with OpenJDK.
*******************************************************************************/
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
+void signal_thread_handler(int sig)
{
- /* do thread dump */
+ switch (sig) {
+ case SIGINT:
+ /* exit the vm properly */
- threads_dump();
-}
+ vm_exit(0);
+ break;
+
+ case SIGQUIT:
+ /* print a thread dump */
+#if defined(ENABLE_THREADS)
+ threads_dump();
+#endif
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ statistics_print_memory_usage();
#endif
+ break;
+ }
+}
-/* signal_handler_sigint *******************************************************
+/* signal_start_thread *********************************************************
- Handler for SIGINT (<ctrl>-c) which shuts down CACAO properly with
- Runtime.exit(I)V.
+ Starts the signal handler thread.
*******************************************************************************/
-void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
+bool signal_start_thread(void)
{
- /* if we are already in Runtime.exit(), just do it hardcore */
+#if defined(ENABLE_THREADS)
+ utf *name;
- if (cacao_exiting) {
- fprintf(stderr, "Catched SIGINT while already shutting down. Shutdown aborted...\n");
- exit(0);
- }
+ name = utf_new_char("Signal Handler");
- /* exit the vm properly */
+ if (!threads_thread_start_internal(name, signal_thread))
+ return false;
- cacao_exit(0);
+ /* everything's ok */
+
+ return true;
+#else
+#warning FIX ME!
+#endif
}
-/* signal_handler_sigusr1 ******************************************************
+/* signal_handler_sighup *******************************************************
- XXX
+ This handler is required by threads_thread_interrupt and does
+ nothing.
*******************************************************************************/
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
+#if defined(ENABLE_THREADS)
+void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p)
{
- /* call stacktrace function */
-
- stacktrace_dump_trace();
+ /* do nothing */
}
#endif
projects / cacao.git / blobdiff