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