2ba5ed53d6
Reviewed-by: rkennke
274 lines
11 KiB
C++
274 lines
11 KiB
C++
/*
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* Copyright (c) 2015, 2020, Red Hat, 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 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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#include "precompiled.hpp"
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#include "classfile/classLoaderDataGraph.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "code/codeCache.hpp"
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#include "gc/shenandoah/shenandoahClosures.inline.hpp"
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#include "gc/shenandoah/shenandoahConcurrentRoots.hpp"
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#include "gc/shenandoah/shenandoahRootProcessor.inline.hpp"
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#include "gc/shenandoah/shenandoahHeap.hpp"
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#include "gc/shenandoah/shenandoahPhaseTimings.hpp"
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#include "gc/shenandoah/shenandoahStringDedup.hpp"
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#include "gc/shenandoah/shenandoahVMOperations.hpp"
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#include "jfr/jfr.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 "runtime/thread.hpp"
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#include "services/management.hpp"
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ShenandoahSerialRoot::ShenandoahSerialRoot(ShenandoahSerialRoot::OopsDo oops_do, ShenandoahPhaseTimings::GCParPhases phase) :
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_oops_do(oops_do), _phase(phase) {
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}
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void ShenandoahSerialRoot::oops_do(OopClosure* cl, uint worker_id) {
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if (_claimed.try_set()) {
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ShenandoahWorkerTimingsTracker timer(_phase, worker_id);
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_oops_do(cl);
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}
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}
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// Overwrite the second argument for SD::oops_do, don't include vm global oop storage.
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static void system_dictionary_oops_do(OopClosure* cl) {
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SystemDictionary::oops_do(cl, false);
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}
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ShenandoahSerialRoots::ShenandoahSerialRoots() :
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_universe_root(&Universe::oops_do, ShenandoahPhaseTimings::UniverseRoots),
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_object_synchronizer_root(&ObjectSynchronizer::oops_do, ShenandoahPhaseTimings::ObjectSynchronizerRoots),
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_management_root(&Management::oops_do, ShenandoahPhaseTimings::ManagementRoots),
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_system_dictionary_root(&system_dictionary_oops_do, ShenandoahPhaseTimings::SystemDictionaryRoots),
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_jvmti_root(&JvmtiExport::oops_do, ShenandoahPhaseTimings::JVMTIRoots) {
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}
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void ShenandoahSerialRoots::oops_do(OopClosure* cl, uint worker_id) {
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_universe_root.oops_do(cl, worker_id);
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_object_synchronizer_root.oops_do(cl, worker_id);
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_management_root.oops_do(cl, worker_id);
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_system_dictionary_root.oops_do(cl, worker_id);
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_jvmti_root.oops_do(cl, worker_id);
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}
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ShenandoahWeakSerialRoot::ShenandoahWeakSerialRoot(ShenandoahWeakSerialRoot::WeakOopsDo weak_oops_do, ShenandoahPhaseTimings::GCParPhases phase) :
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_weak_oops_do(weak_oops_do), _phase(phase) {
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}
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void ShenandoahWeakSerialRoot::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* keep_alive, uint worker_id) {
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if (_claimed.try_set()) {
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ShenandoahWorkerTimingsTracker timer(_phase, worker_id);
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_weak_oops_do(is_alive, keep_alive);
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}
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}
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#if INCLUDE_JVMTI
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ShenandoahJVMTIWeakRoot::ShenandoahJVMTIWeakRoot() :
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ShenandoahWeakSerialRoot(&JvmtiExport::weak_oops_do, ShenandoahPhaseTimings::JVMTIWeakRoots) {
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}
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#endif // INCLUDE_JVMTI
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#if INCLUDE_JFR
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ShenandoahJFRWeakRoot::ShenandoahJFRWeakRoot() :
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ShenandoahWeakSerialRoot(&Jfr::weak_oops_do, ShenandoahPhaseTimings::JFRWeakRoots) {
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}
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#endif // INCLUDE_JFR
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void ShenandoahSerialWeakRoots::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* keep_alive, uint worker_id) {
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JVMTI_ONLY(_jvmti_weak_roots.weak_oops_do(is_alive, keep_alive, worker_id);)
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JFR_ONLY(_jfr_weak_roots.weak_oops_do(is_alive, keep_alive, worker_id);)
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}
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void ShenandoahSerialWeakRoots::weak_oops_do(OopClosure* cl, uint worker_id) {
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AlwaysTrueClosure always_true;
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weak_oops_do(&always_true, cl, worker_id);
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}
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ShenandoahThreadRoots::ShenandoahThreadRoots(bool is_par) : _is_par(is_par) {
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Threads::change_thread_claim_token();
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}
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void ShenandoahThreadRoots::oops_do(OopClosure* oops_cl, CodeBlobClosure* code_cl, uint worker_id) {
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ShenandoahWorkerTimingsTracker timer(ShenandoahPhaseTimings::ThreadRoots, worker_id);
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ResourceMark rm;
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Threads::possibly_parallel_oops_do(_is_par, oops_cl, code_cl);
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}
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void ShenandoahThreadRoots::threads_do(ThreadClosure* tc, uint worker_id) {
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ShenandoahWorkerTimingsTracker timer(ShenandoahPhaseTimings::ThreadRoots, worker_id);
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ResourceMark rm;
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Threads::possibly_parallel_threads_do(_is_par, tc);
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}
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ShenandoahThreadRoots::~ShenandoahThreadRoots() {
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Threads::assert_all_threads_claimed();
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}
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ShenandoahStringDedupRoots::ShenandoahStringDedupRoots() {
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if (ShenandoahStringDedup::is_enabled()) {
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StringDedup::gc_prologue(false);
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}
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}
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ShenandoahStringDedupRoots::~ShenandoahStringDedupRoots() {
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if (ShenandoahStringDedup::is_enabled()) {
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StringDedup::gc_epilogue();
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}
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}
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void ShenandoahStringDedupRoots::oops_do(BoolObjectClosure* is_alive, OopClosure* keep_alive, uint worker_id) {
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if (ShenandoahStringDedup::is_enabled()) {
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ShenandoahStringDedup::parallel_oops_do(is_alive, keep_alive, worker_id);
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}
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}
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ShenandoahConcurrentStringDedupRoots::ShenandoahConcurrentStringDedupRoots() {
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if (ShenandoahStringDedup::is_enabled()) {
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StringDedupTable_lock->lock_without_safepoint_check();
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StringDedupQueue_lock->lock_without_safepoint_check();
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StringDedup::gc_prologue(true);
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}
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}
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ShenandoahConcurrentStringDedupRoots::~ShenandoahConcurrentStringDedupRoots() {
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if (ShenandoahStringDedup::is_enabled()) {
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StringDedup::gc_epilogue();
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StringDedupQueue_lock->unlock();
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StringDedupTable_lock->unlock();
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}
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}
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void ShenandoahConcurrentStringDedupRoots::oops_do(BoolObjectClosure* is_alive, OopClosure* keep_alive, uint worker_id) {
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if (ShenandoahStringDedup::is_enabled()) {
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assert_locked_or_safepoint_weak(StringDedupQueue_lock);
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assert_locked_or_safepoint_weak(StringDedupTable_lock);
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StringDedupUnlinkOrOopsDoClosure sd_cl(is_alive, keep_alive);
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StringDedupQueue::unlink_or_oops_do(&sd_cl);
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StringDedupTable::unlink_or_oops_do(&sd_cl, worker_id);
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}
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}
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ShenandoahRootProcessor::ShenandoahRootProcessor(ShenandoahPhaseTimings::Phase phase) :
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_heap(ShenandoahHeap::heap()),
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_phase(phase),
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_worker_phase(phase) {
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assert(SafepointSynchronize::is_at_safepoint(), "Must at safepoint");
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}
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ShenandoahRootEvacuator::ShenandoahRootEvacuator(uint n_workers,
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ShenandoahPhaseTimings::Phase phase,
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bool stw_roots_processing,
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bool stw_class_unloading) :
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ShenandoahRootProcessor(phase),
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_thread_roots(n_workers > 1),
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_stw_roots_processing(stw_roots_processing),
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_stw_class_unloading(stw_class_unloading) {
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}
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void ShenandoahRootEvacuator::roots_do(uint worker_id, OopClosure* oops) {
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MarkingCodeBlobClosure blobsCl(oops, CodeBlobToOopClosure::FixRelocations);
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ShenandoahCodeBlobAndDisarmClosure blobs_and_disarm_Cl(oops);
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CodeBlobToOopClosure* codes_cl = ShenandoahConcurrentRoots::can_do_concurrent_class_unloading() ?
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static_cast<CodeBlobToOopClosure*>(&blobs_and_disarm_Cl) :
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static_cast<CodeBlobToOopClosure*>(&blobsCl);
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AlwaysTrueClosure always_true;
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_serial_roots.oops_do(oops, worker_id);
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_serial_weak_roots.weak_oops_do(oops, worker_id);
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if (_stw_roots_processing) {
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_vm_roots.oops_do<OopClosure>(oops, worker_id);
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_weak_roots.oops_do<OopClosure>(oops, worker_id);
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_dedup_roots.oops_do(&always_true, oops, worker_id);
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}
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if (_stw_class_unloading) {
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CLDToOopClosure clds(oops, ClassLoaderData::_claim_strong);
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_cld_roots.cld_do(&clds, worker_id);
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_code_roots.code_blobs_do(codes_cl, worker_id);
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_thread_roots.oops_do(oops, NULL, worker_id);
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} else {
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_thread_roots.oops_do(oops, codes_cl, worker_id);
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}
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}
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ShenandoahRootUpdater::ShenandoahRootUpdater(uint n_workers, ShenandoahPhaseTimings::Phase phase) :
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ShenandoahRootProcessor(phase),
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_thread_roots(n_workers > 1) {
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}
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ShenandoahRootAdjuster::ShenandoahRootAdjuster(uint n_workers, ShenandoahPhaseTimings::Phase phase) :
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ShenandoahRootProcessor(phase),
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_thread_roots(n_workers > 1) {
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assert(ShenandoahHeap::heap()->is_full_gc_in_progress(), "Full GC only");
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}
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void ShenandoahRootAdjuster::roots_do(uint worker_id, OopClosure* oops) {
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CodeBlobToOopClosure code_blob_cl(oops, CodeBlobToOopClosure::FixRelocations);
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ShenandoahCodeBlobAndDisarmClosure blobs_and_disarm_Cl(oops);
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CodeBlobToOopClosure* adjust_code_closure = ShenandoahConcurrentRoots::can_do_concurrent_class_unloading() ?
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static_cast<CodeBlobToOopClosure*>(&blobs_and_disarm_Cl) :
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static_cast<CodeBlobToOopClosure*>(&code_blob_cl);
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CLDToOopClosure adjust_cld_closure(oops, ClassLoaderData::_claim_strong);
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AlwaysTrueClosure always_true;
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_serial_roots.oops_do(oops, worker_id);
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_vm_roots.oops_do(oops, worker_id);
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_thread_roots.oops_do(oops, NULL, worker_id);
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_cld_roots.cld_do(&adjust_cld_closure, worker_id);
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_code_roots.code_blobs_do(adjust_code_closure, worker_id);
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_serial_weak_roots.weak_oops_do(oops, worker_id);
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_weak_roots.oops_do<OopClosure>(oops, worker_id);
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_dedup_roots.oops_do(&always_true, oops, worker_id);
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}
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ShenandoahHeapIterationRootScanner::ShenandoahHeapIterationRootScanner() :
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ShenandoahRootProcessor(ShenandoahPhaseTimings::_num_phases),
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_thread_roots(false /*is par*/) {
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}
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void ShenandoahHeapIterationRootScanner::roots_do(OopClosure* oops) {
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assert(Thread::current()->is_VM_thread(), "Only by VM thread");
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// Must use _claim_none to avoid interfering with concurrent CLDG iteration
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CLDToOopClosure clds(oops, ClassLoaderData::_claim_none);
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MarkingCodeBlobClosure code(oops, !CodeBlobToOopClosure::FixRelocations);
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ShenandoahParallelOopsDoThreadClosure tc_cl(oops, &code, NULL);
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AlwaysTrueClosure always_true;
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ResourceMark rm;
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_serial_roots.oops_do(oops, 0);
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_vm_roots.oops_do(oops, 0);
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_cld_roots.cld_do(&clds, 0);
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_thread_roots.threads_do(&tc_cl, 0);
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_code_roots.code_blobs_do(&code, 0);
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_serial_weak_roots.weak_oops_do(oops, 0);
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_weak_roots.oops_do<OopClosure>(oops, 0);
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_dedup_roots.oops_do(&always_true, oops, 0);
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}
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