/* src/vm/finalizer.c - finalizer linked list and thread
- 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, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
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: finalizer.c 3686 2005-11-16 13:29:58Z twisti $
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
*/
#include "config.h"
+
+#include <stdlib.h>
+
#include "vm/types.h"
#include "mm/memory.h"
-#include "native/jni.h"
-#include "native/include/java_lang_Thread.h"
-#include "native/include/java_lang_VMThread.h"
-#include "vm/builtin.h"
-#include "vm/exceptions.h"
-#include "vm/global.h"
-#include "vm/stringlocal.h"
-#include "vm/jit/asmpart.h"
+#include "threads/condition.hpp"
+#include "threads/mutex.hpp"
+#include "threads/thread.hpp"
-/* local structures ***********************************************************/
-
-typedef struct finalizer_entry finalizer_entry;
+#include "vm/jit/builtin.hpp"
+#include "vm/exceptions.hpp"
+#include "vm/global.h"
+#include "vm/options.h"
+#include "vm/vm.hpp"
-struct finalizer_entry {
- java_objectheader *o;
- listnode linkage;
-};
+#include "vm/jit/asmpart.h"
/* global variables ***********************************************************/
-#if defined(USE_THREADS)
-static java_lang_VMThread *finalizer_vmthread;
-static java_objectheader *lock_finalizer_thread;
-static list *finalizer_list;
+#if defined(ENABLE_THREADS)
+static Mutex *finalizer_thread_mutex;
+static Condition *finalizer_thread_cond;
#endif
bool finalizer_init(void)
{
-#if defined(USE_THREADS)
- lock_finalizer_thread = NEW(java_objectheader);
-
-# if defined(NATIVE_THREADS)
- initObjectLock(lock_finalizer_thread);
-# endif
+ TRACESUBSYSTEMINITIALIZATION("finalizer_init");
- /* initialize the finalizer list */
-
- finalizer_list = NEW(list);
- list_init(finalizer_list, OFFSET(finalizer_entry, linkage));
+#if defined(ENABLE_THREADS)
+ finalizer_thread_mutex = Mutex_new();
+ finalizer_thread_cond = Condition_new();
#endif
/* everything's ok */
*******************************************************************************/
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
static void finalizer_thread(void)
{
- finalizer_entry *fi;
- java_objectheader *o;
-
- /* get the lock on the finalizer lock object, so we can call wait */
-
while (true) {
- /* wait forever (0, 0) on that object till we are signaled */
-
- wait_cond_for_object(lock_finalizer_thread, 0, 0);
-
- /* now handle all finalizers stored in the list */
-
- fi = (finalizer_entry *) list_first(finalizer_list);
-
- /* release the lock so other threads, or the finalizer thread
- itself, can add new finalizers to the list */
-
- builtin_monitorexit(lock_finalizer_thread);
-
- /* is there actually a finalizer in the list? */
-
- if (fi) {
- do {
- /* just for simpler code */
-
- o = fi->o;
+ /* get the lock on the finalizer mutex, so we can call wait */
- /* call the finalizer function */
+ Mutex_lock(finalizer_thread_mutex);
- asm_calljavafunction(o->vftbl->class->finalizer, o,
- NULL, NULL, NULL);
-
- /* if we had an exception in the finalizer, ignore it */
-
- *exceptionptr = NULL;
-
- /* enter the monitor again, so we don't get finalizer
- list race conditions */
-
- builtin_monitorenter(lock_finalizer_thread);
-
- /* remove and clear finalized entry */
-
- list_remove(finalizer_list, fi);
+ /* wait forever on that condition till we are signaled */
+
+ Condition_wait(finalizer_thread_cond, finalizer_thread_mutex);
- fi->o = NULL;
- FREE(fi, finalizer_entry);
+ /* leave the lock */
- /* get next finalizer from the list */
+ Mutex_unlock(finalizer_thread_mutex);
- fi = list_first(finalizer_list);
+#if !defined(NDEBUG)
+ if (opt_DebugFinalizer)
+ log_println("[finalizer thread : status=awake]");
+#endif
- /* leave the monitor again */
+ /* and call the finalizers */
- builtin_monitorexit(lock_finalizer_thread);
- } while (fi != NULL);
- }
+ gc_invoke_finalizers();
- builtin_monitorenter(lock_finalizer_thread);
+#if !defined(NDEBUG)
+ if (opt_DebugFinalizer)
+ log_println("[finalizer thread : status=sleeping]");
+#endif
}
}
#endif
+
/* finalizer_start_thread ******************************************************
Starts the finalizer thread.
*******************************************************************************/
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
bool finalizer_start_thread(void)
{
- java_lang_Thread *t;
-
- /* create the finalizer object */
+ utf *name;
- finalizer_vmthread =
- (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
+ name = utf_new_char("Finalizer");
- if (!finalizer_vmthread)
+ if (!threads_thread_start_internal(name, finalizer_thread))
return false;
- t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
-
- t->vmThread = finalizer_vmthread;
- t->name = javastring_new_char("Finalizer");
- t->daemon = true;
- t->priority = 5;
-
- finalizer_vmthread->thread = t;
-
- /* actually start the finalizer thread */
-
- threads_start_thread(t, finalizer_thread);
-
/* everything's ok */
return true;
#endif
-/* finalizer_add ***************************************************************
+/* finalizer_notify ************************************************************
- Adds a finalizer to be called to the linked list of finalizers.
+ Notifies the finalizer thread that it should run the
+ gc_invoke_finalizers from the GC.
*******************************************************************************/
-void finalizer_add(void *o, void *p)
+void finalizer_notify(void)
{
-#if defined(USE_THREADS)
- java_objectheader *ob;
- finalizer_entry *fi;
+#if !defined(NDEBUG)
+ if (opt_DebugFinalizer)
+ log_println("[finalizer notified]");
+#endif
- ob = (java_objectheader *) o;
+#if defined(ENABLE_THREADS)
+ /* get the lock on the finalizer lock object, so we can call wait */
- /* wait for the finalizer thread to finish finalizer list operations */
+ Mutex_lock(finalizer_thread_mutex);
- builtin_monitorenter(lock_finalizer_thread);
+ /* signal the finalizer thread */
- /* create finalizer entry, fill it and add it to the list */
+ Condition_signal(finalizer_thread_cond);
- fi = NEW(finalizer_entry);
- fi->o = ob;
+ /* leave the lock */
- list_addlast(finalizer_list, fi);
+ Mutex_unlock(finalizer_thread_mutex);
+#else
+ /* if we don't have threads, just run the finalizers */
- /* wakeup the finalizer thread */
+ gc_invoke_finalizers();
+#endif
+}
- signal_cond_for_object(lock_finalizer_thread);
- /* release the lock after the entry is added */
+/* finalizer_run ***************************************************************
- builtin_monitorexit(lock_finalizer_thread);
-#else
- java_objectheader *ob;
+ Actually run the finalizer functions.
- ob = (java_objectheader *) o;
+*******************************************************************************/
+
+void finalizer_run(void *o, void *p)
+{
+ java_handle_t *h;
+ classinfo *c;
+
+ h = (java_handle_t *) o;
+
+#if !defined(ENABLE_GC_CACAO) && defined(ENABLE_HANDLES)
+ /* XXX this is only a dirty hack to make Boehm work with handles */
+
+ h = LLNI_WRAP((java_object_t *) h);
+#endif
+
+ LLNI_class_get(h, c);
+
+#if !defined(NDEBUG)
+ if (opt_DebugFinalizer) {
+ log_start();
+ log_print("[finalizer running : o=%p p=%p class=", o, p);
+ class_print(c);
+ log_print("]");
+ log_finish();
+ }
+#endif
/* call the finalizer function */
- asm_calljavafunction(ob->vftbl->class->finalizer, ob, NULL, NULL, NULL);
+ (void) vm_call_method(c->finalizer, h);
+
+#if !defined(NDEBUG)
+ if (opt_DebugFinalizer && (exceptions_get_exception() != NULL)) {
+ log_println("[finalizer exception]");
+ exceptions_print_stacktrace();
+ }
+#endif
/* if we had an exception in the finalizer, ignore it */
- *exceptionptr = NULL;
-#endif
+ exceptions_clear_exception();
}
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