author | stefank |
Mon, 07 May 2018 16:12:07 +0200 | |
changeset 50058 | f7e564cacfbc |
parent 49982 | 9042ffe5b7fe |
child 51292 | 0538a5cdb474 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002, 2018, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "aot/aotLoader.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "code/codeCache.hpp" |
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#include "gc/parallel/gcTaskManager.hpp" |
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#include "gc/parallel/psCardTable.hpp" |
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#include "gc/parallel/psPromotionManager.hpp" |
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#include "gc/parallel/psPromotionManager.inline.hpp" |
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#include "gc/parallel/psScavenge.inline.hpp" |
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#include "gc/parallel/psTasks.hpp" |
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#include "gc/shared/taskqueue.inline.hpp" |
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#include "memory/iterator.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "runtime/thread.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "services/management.hpp" |
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// |
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// ScavengeRootsTask |
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// |
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void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) { |
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assert(ParallelScavengeHeap::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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PSPromoteRootsClosure roots_to_old_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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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, NULL); |
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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 system_dictionary: |
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SystemDictionary::oops_do(&roots_closure); |
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break; |
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case class_loader_data: |
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{ |
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PSScavengeCLDClosure cld_closure(pm); |
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ClassLoaderDataGraph::cld_do(&cld_closure); |
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} |
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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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case code_cache: |
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{ |
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MarkingCodeBlobClosure each_scavengable_code_blob(&roots_to_old_closure, CodeBlobToOopClosure::FixRelocations); |
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CodeCache::scavenge_root_nmethods_do(&each_scavengable_code_blob); |
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AOTLoader::oops_do(&roots_closure); |
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} |
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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(ParallelScavengeHeap::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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MarkingCodeBlobClosure roots_in_blobs(&roots_closure, CodeBlobToOopClosure::FixRelocations); |
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_thread->oops_do(&roots_closure, &roots_in_blobs); |
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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(ParallelScavengeHeap::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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while(true) { |
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StarTask p; |
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if (PSPromotionManager::steal_depth(which, &random_seed, p)) { |
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TASKQUEUE_STATS_ONLY(pm->record_steal(p)); |
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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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guarantee(pm->stacks_empty(), "stacks should be empty at this point"); |
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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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// There are not old-to-young pointers if the old gen is empty. |
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assert(!_old_gen->object_space()->is_empty(), |
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"Should not be called is there is no work"); |
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assert(_old_gen != NULL, "Sanity"); |
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assert(_old_gen->object_space()->contains(_gen_top) || _gen_top == _old_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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PSCardTable* card_table = ParallelScavengeHeap::heap()->card_table(); |
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card_table->scavenge_contents_parallel(_old_gen->start_array(), |
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_old_gen->object_space(), |
1 | 178 |
_gen_top, |
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pm, |
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_stripe_number, |
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_stripe_total); |
1 | 182 |
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// Do the real work |
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pm->drain_stacks(false); |
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} |
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} |