| /* |
| * 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); |
| } |
| } |