--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,221 @@
+/*
+ * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_psTasks.cpp.incl"
+
+//
+// ScavengeRootsTask
+//
+
+// Define before use
+class PSScavengeRootsClosure: public OopClosure {
+ private:
+ PSPromotionManager* _promotion_manager;
+
+ public:
+ PSScavengeRootsClosure(PSPromotionManager* pm) : _promotion_manager(pm) { }
+
+ virtual void do_oop(oop* p) {
+ if (PSScavenge::should_scavenge(*p)) {
+ // We never card mark roots, maybe call a func without test?
+ PSScavenge::copy_and_push_safe_barrier(_promotion_manager, p);
+ }
+ }
+};
+
+void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) {
+ assert(Universe::heap()->is_gc_active(), "called outside gc");
+
+ PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
+ PSScavengeRootsClosure roots_closure(pm);
+
+ switch (_root_type) {
+ case universe:
+ Universe::oops_do(&roots_closure);
+ ReferenceProcessor::oops_do(&roots_closure);
+ break;
+
+ case jni_handles:
+ JNIHandles::oops_do(&roots_closure);
+ break;
+
+ case threads:
+ {
+ ResourceMark rm;
+ Threads::oops_do(&roots_closure);
+ }
+ break;
+
+ case object_synchronizer:
+ ObjectSynchronizer::oops_do(&roots_closure);
+ break;
+
+ case flat_profiler:
+ FlatProfiler::oops_do(&roots_closure);
+ break;
+
+ case system_dictionary:
+ SystemDictionary::oops_do(&roots_closure);
+ break;
+
+ case management:
+ Management::oops_do(&roots_closure);
+ break;
+
+ case jvmti:
+ JvmtiExport::oops_do(&roots_closure);
+ break;
+
+ default:
+ fatal("Unknown root type");
+ }
+
+ // Do the real work
+ pm->drain_stacks(false);
+}
+
+//
+// ThreadRootsTask
+//
+
+void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) {
+ assert(Universe::heap()->is_gc_active(), "called outside gc");
+
+ PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
+ PSScavengeRootsClosure roots_closure(pm);
+
+ if (_java_thread != NULL)
+ _java_thread->oops_do(&roots_closure);
+
+ if (_vm_thread != NULL)
+ _vm_thread->oops_do(&roots_closure);
+
+ // Do the real work
+ pm->drain_stacks(false);
+}
+
+//
+// StealTask
+//
+
+StealTask::StealTask(ParallelTaskTerminator* t) :
+ _terminator(t) {}
+
+void StealTask::do_it(GCTaskManager* manager, uint which) {
+ assert(Universe::heap()->is_gc_active(), "called outside gc");
+
+ PSPromotionManager* pm =
+ PSPromotionManager::gc_thread_promotion_manager(which);
+ pm->drain_stacks(true);
+ guarantee(pm->stacks_empty(),
+ "stacks should be empty at this point");
+
+ int random_seed = 17;
+ if (pm->depth_first()) {
+ while(true) {
+ oop* p;
+ if (PSPromotionManager::steal_depth(which, &random_seed, p)) {
+#if PS_PM_STATS
+ pm->increment_steals(p);
+#endif // PS_PM_STATS
+ pm->process_popped_location_depth(p);
+ pm->drain_stacks_depth(true);
+ } else {
+ if (terminator()->offer_termination()) {
+ break;
+ }
+ }
+ }
+ } else {
+ while(true) {
+ oop obj;
+ if (PSPromotionManager::steal_breadth(which, &random_seed, obj)) {
+#if PS_PM_STATS
+ pm->increment_steals();
+#endif // PS_PM_STATS
+ obj->copy_contents(pm);
+ pm->drain_stacks_breadth(true);
+ } else {
+ if (terminator()->offer_termination()) {
+ break;
+ }
+ }
+ }
+ }
+ guarantee(pm->stacks_empty(),
+ "stacks should be empty at this point");
+}
+
+//
+// SerialOldToYoungRootsTask
+//
+
+void SerialOldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) {
+ assert(_gen != NULL, "Sanity");
+ assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity");
+
+ {
+ PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
+
+ assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
+ CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set();
+ // FIX ME! Assert that card_table is the type we believe it to be.
+
+ card_table->scavenge_contents(_gen->start_array(),
+ _gen->object_space(),
+ _gen_top,
+ pm);
+
+ // Do the real work
+ pm->drain_stacks(false);
+ }
+}
+
+//
+// OldToYoungRootsTask
+//
+
+void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) {
+ assert(_gen != NULL, "Sanity");
+ assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity");
+ assert(_stripe_number < ParallelGCThreads, "Sanity");
+
+ {
+ PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which);
+
+ assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
+ CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set();
+ // FIX ME! Assert that card_table is the type we believe it to be.
+
+ card_table->scavenge_contents_parallel(_gen->start_array(),
+ _gen->object_space(),
+ _gen_top,
+ pm,
+ _stripe_number);
+
+ // Do the real work
+ pm->drain_stacks(false);
+ }
+}