author | coleenp |
Fri, 28 Sep 2018 16:07:39 -0400 | |
changeset 51959 | db0c3952de52 |
parent 51803 | a16777c0a6c5 |
child 52140 | 3a168f782e80 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 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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#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 "compiler/oopMap.hpp" |
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#include "gc/shared/oopStorageParState.inline.hpp" |
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#include "gc/z/zGlobals.hpp" |
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#include "gc/z/zNMethodTable.hpp" |
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#include "gc/z/zOopClosures.inline.hpp" |
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#include "gc/z/zRootsIterator.hpp" |
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#include "gc/z/zStat.hpp" |
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#include "gc/z/zThreadLocalData.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "memory/universe.hpp" |
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#include "prims/jvmtiExport.hpp" |
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#include "runtime/atomic.hpp" |
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#include "runtime/jniHandles.hpp" |
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#include "runtime/thread.hpp" |
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#include "runtime/safepoint.hpp" |
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#include "runtime/synchronizer.hpp" |
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#include "services/management.hpp" |
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#include "utilities/debug.hpp" |
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#if INCLUDE_JFR |
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#include "jfr/jfr.hpp" |
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#endif |
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static const ZStatSubPhase ZSubPhasePauseRootsSetup("Pause Roots Setup"); |
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static const ZStatSubPhase ZSubPhasePauseRoots("Pause Roots"); |
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static const ZStatSubPhase ZSubPhasePauseRootsTeardown("Pause Roots Teardown"); |
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static const ZStatSubPhase ZSubPhasePauseRootsUniverse("Pause Roots Universe"); |
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static const ZStatSubPhase ZSubPhasePauseRootsJNIHandles("Pause Roots JNIHandles"); |
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static const ZStatSubPhase ZSubPhasePauseRootsObjectSynchronizer("Pause Roots ObjectSynchronizer"); |
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static const ZStatSubPhase ZSubPhasePauseRootsManagement("Pause Roots Management"); |
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static const ZStatSubPhase ZSubPhasePauseRootsJVMTIExport("Pause Roots JVMTIExport"); |
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static const ZStatSubPhase ZSubPhasePauseRootsJVMTIWeakExport("Pause Roots JVMTIWeakExport"); |
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static const ZStatSubPhase ZSubPhasePauseRootsSystemDictionary("Pause Roots SystemDictionary"); |
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static const ZStatSubPhase ZSubPhasePauseRootsClassLoaderDataGraph("Pause Roots ClassLoaderDataGraph"); |
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static const ZStatSubPhase ZSubPhasePauseRootsThreads("Pause Roots Threads"); |
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static const ZStatSubPhase ZSubPhasePauseRootsCodeCache("Pause Roots CodeCache"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRootsSetup("Pause Weak Roots Setup"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRoots("Pause Weak Roots"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRootsTeardown("Pause Weak Roots Teardown"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRootsJVMTIWeakExport("Pause Weak Roots JVMTIWeakExport"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRootsJFRWeak("Pause Weak Roots JFRWeak"); |
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static const ZStatSubPhase ZSubPhaseConcurrentWeakRoots("Concurrent Weak Roots"); |
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static const ZStatSubPhase ZSubPhaseConcurrentWeakRootsVMWeakHandles("Concurrent Weak Roots VMWeakHandles"); |
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static const ZStatSubPhase ZSubPhaseConcurrentWeakRootsJNIWeakHandles("Concurrent Weak Roots JNIWeakHandles"); |
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static const ZStatSubPhase ZSubPhaseConcurrentWeakRootsStringTable("Concurrent Weak Roots StringTable"); |
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template <typename T, void (T::*F)(ZRootsIteratorClosure*)> |
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ZSerialOopsDo<T, F>::ZSerialOopsDo(T* iter) : |
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_iter(iter), |
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_claimed(false) {} |
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template <typename T, void (T::*F)(ZRootsIteratorClosure*)> |
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void ZSerialOopsDo<T, F>::oops_do(ZRootsIteratorClosure* cl) { |
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if (!_claimed && Atomic::cmpxchg(true, &_claimed, false) == false) { |
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(_iter->*F)(cl); |
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} |
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} |
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template <typename T, void (T::*F)(ZRootsIteratorClosure*)> |
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ZParallelOopsDo<T, F>::ZParallelOopsDo(T* iter) : |
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_iter(iter), |
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_completed(false) {} |
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template <typename T, void (T::*F)(ZRootsIteratorClosure*)> |
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void ZParallelOopsDo<T, F>::oops_do(ZRootsIteratorClosure* cl) { |
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if (!_completed) { |
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(_iter->*F)(cl); |
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if (!_completed) { |
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_completed = true; |
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} |
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} |
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} |
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template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)> |
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ZSerialWeakOopsDo<T, F>::ZSerialWeakOopsDo(T* iter) : |
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_iter(iter), |
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_claimed(false) {} |
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template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)> |
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void ZSerialWeakOopsDo<T, F>::weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl) { |
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if (!_claimed && Atomic::cmpxchg(true, &_claimed, false) == false) { |
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(_iter->*F)(is_alive, cl); |
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} |
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} |
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template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)> |
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ZParallelWeakOopsDo<T, F>::ZParallelWeakOopsDo(T* iter) : |
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_iter(iter), |
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_completed(false) {} |
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template <typename T, void (T::*F)(BoolObjectClosure*, ZRootsIteratorClosure*)> |
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void ZParallelWeakOopsDo<T, F>::weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl) { |
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if (!_completed) { |
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(_iter->*F)(is_alive, cl); |
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if (!_completed) { |
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_completed = true; |
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} |
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} |
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} |
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|
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ZRootsIterator::ZRootsIterator() : |
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_jni_handles_iter(JNIHandles::global_handles()), |
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_universe(this), |
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_object_synchronizer(this), |
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_management(this), |
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_jvmti_export(this), |
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_jvmti_weak_export(this), |
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_system_dictionary(this), |
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_jni_handles(this), |
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_class_loader_data_graph(this), |
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_threads(this), |
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_code_cache(this) { |
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assert(SafepointSynchronize::is_at_safepoint(), "Should be at safepoint"); |
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ZStatTimer timer(ZSubPhasePauseRootsSetup); |
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Threads::change_thread_claim_parity(); |
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ClassLoaderDataGraph::clear_claimed_marks(); |
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COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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CodeCache::gc_prologue(); |
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ZNMethodTable::gc_prologue(); |
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} |
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|
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ZRootsIterator::~ZRootsIterator() { |
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ZStatTimer timer(ZSubPhasePauseRootsTeardown); |
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ResourceMark rm; |
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ZNMethodTable::gc_epilogue(); |
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CodeCache::gc_epilogue(); |
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JvmtiExport::gc_epilogue(); |
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COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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Threads::assert_all_threads_claimed(); |
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} |
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160 |
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51803 | 161 |
void ZRootsIterator::do_universe(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsUniverse); |
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Universe::oops_do(cl); |
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} |
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165 |
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51803 | 166 |
void ZRootsIterator::do_jni_handles(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsJNIHandles); |
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_jni_handles_iter.oops_do(cl); |
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} |
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170 |
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51803 | 171 |
void ZRootsIterator::do_object_synchronizer(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsObjectSynchronizer); |
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ObjectSynchronizer::oops_do(cl); |
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} |
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51803 | 176 |
void ZRootsIterator::do_management(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsManagement); |
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Management::oops_do(cl); |
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} |
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void ZRootsIterator::do_jvmti_export(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsJVMTIExport); |
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JvmtiExport::oops_do(cl); |
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} |
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185 |
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51803 | 186 |
void ZRootsIterator::do_jvmti_weak_export(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsJVMTIWeakExport); |
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AlwaysTrueClosure always_alive; |
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JvmtiExport::weak_oops_do(&always_alive, cl); |
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} |
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191 |
|
51803 | 192 |
void ZRootsIterator::do_system_dictionary(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsSystemDictionary); |
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SystemDictionary::oops_do(cl); |
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} |
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|
51803 | 197 |
void ZRootsIterator::do_class_loader_data_graph(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsClassLoaderDataGraph); |
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CLDToOopClosure cld_cl(cl); |
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ClassLoaderDataGraph::cld_do(&cld_cl); |
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} |
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202 |
|
51803 | 203 |
void ZRootsIterator::do_threads(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsThreads); |
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ResourceMark rm; |
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Threads::possibly_parallel_threads_do(true, cl); |
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} |
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208 |
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51803 | 209 |
void ZRootsIterator::do_code_cache(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsCodeCache); |
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ZNMethodTable::oops_do(cl); |
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} |
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51803 | 214 |
void ZRootsIterator::oops_do(ZRootsIteratorClosure* cl, bool visit_jvmti_weak_export) { |
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ZStatTimer timer(ZSubPhasePauseRoots); |
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_universe.oops_do(cl); |
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_object_synchronizer.oops_do(cl); |
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_management.oops_do(cl); |
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_jvmti_export.oops_do(cl); |
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_system_dictionary.oops_do(cl); |
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_jni_handles.oops_do(cl); |
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_class_loader_data_graph.oops_do(cl); |
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_threads.oops_do(cl); |
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_code_cache.oops_do(cl); |
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if (visit_jvmti_weak_export) { |
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_jvmti_weak_export.oops_do(cl); |
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} |
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} |
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|
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ZWeakRootsIterator::ZWeakRootsIterator() : |
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_jvmti_weak_export(this), |
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_jfr_weak(this) { |
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assert(SafepointSynchronize::is_at_safepoint(), "Should be at safepoint"); |
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ZStatTimer timer(ZSubPhasePauseWeakRootsSetup); |
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} |
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|
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ZWeakRootsIterator::~ZWeakRootsIterator() { |
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ZStatTimer timer(ZSubPhasePauseWeakRootsTeardown); |
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} |
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void ZWeakRootsIterator::do_jvmti_weak_export(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseWeakRootsJVMTIWeakExport); |
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JvmtiExport::weak_oops_do(is_alive, cl); |
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} |
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void ZWeakRootsIterator::do_jfr_weak(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl) { |
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#if INCLUDE_JFR |
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ZStatTimer timer(ZSubPhasePauseWeakRootsJFRWeak); |
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Jfr::weak_oops_do(is_alive, cl); |
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#endif |
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} |
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void ZWeakRootsIterator::weak_oops_do(BoolObjectClosure* is_alive, ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseWeakRoots); |
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_jvmti_weak_export.weak_oops_do(is_alive, cl); |
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_jfr_weak.weak_oops_do(is_alive, cl); |
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} |
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void ZWeakRootsIterator::oops_do(ZRootsIteratorClosure* cl) { |
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AlwaysTrueClosure always_alive; |
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weak_oops_do(&always_alive, cl); |
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} |
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|
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ZConcurrentWeakRootsIterator::ZConcurrentWeakRootsIterator() : |
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_vm_weak_handles_iter(SystemDictionary::vm_weak_oop_storage()), |
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_jni_weak_handles_iter(JNIHandles::weak_global_handles()), |
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_string_table_iter(StringTable::weak_storage()), |
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_vm_weak_handles(this), |
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_jni_weak_handles(this), |
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_string_table(this) { |
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StringTable::reset_dead_counter(); |
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} |
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|
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ZConcurrentWeakRootsIterator::~ZConcurrentWeakRootsIterator() { |
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StringTable::finish_dead_counter(); |
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} |
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void ZConcurrentWeakRootsIterator::do_vm_weak_handles(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhaseConcurrentWeakRootsVMWeakHandles); |
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_vm_weak_handles_iter.oops_do(cl); |
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} |
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void ZConcurrentWeakRootsIterator::do_jni_weak_handles(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhaseConcurrentWeakRootsJNIWeakHandles); |
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_jni_weak_handles_iter.oops_do(cl); |
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} |
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class ZStringTableDeadCounterClosure : public ZRootsIteratorClosure { |
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private: |
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ZRootsIteratorClosure* const _cl; |
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size_t _ndead; |
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|
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public: |
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ZStringTableDeadCounterClosure(ZRootsIteratorClosure* cl) : |
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_cl(cl), |
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_ndead(0) {} |
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~ZStringTableDeadCounterClosure() { |
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StringTable::inc_dead_counter(_ndead); |
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} |
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|
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virtual void do_oop(oop* p) { |
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_cl->do_oop(p); |
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if (*p == NULL) { |
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_ndead++; |
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} |
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} |
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virtual void do_oop(narrowOop* p) { |
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ShouldNotReachHere(); |
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} |
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}; |
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void ZConcurrentWeakRootsIterator::do_string_table(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhaseConcurrentWeakRootsStringTable); |
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ZStringTableDeadCounterClosure counter_cl(cl); |
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_string_table_iter.oops_do(&counter_cl); |
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} |
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void ZConcurrentWeakRootsIterator::oops_do(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhaseConcurrentWeakRoots); |
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_vm_weak_handles.oops_do(cl); |
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_jni_weak_handles.oops_do(cl); |
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_string_table.oops_do(cl); |
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} |
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|
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ZThreadRootsIterator::ZThreadRootsIterator() : |
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_threads(this) { |
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assert(SafepointSynchronize::is_at_safepoint(), "Should be at safepoint"); |
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ZStatTimer timer(ZSubPhasePauseRootsSetup); |
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Threads::change_thread_claim_parity(); |
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} |
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333 |
|
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ZThreadRootsIterator::~ZThreadRootsIterator() { |
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ZStatTimer timer(ZSubPhasePauseRootsTeardown); |
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Threads::assert_all_threads_claimed(); |
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} |
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51803 | 339 |
void ZThreadRootsIterator::do_threads(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsThreads); |
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ResourceMark rm; |
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Threads::possibly_parallel_oops_do(true, cl, NULL); |
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} |
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void ZThreadRootsIterator::oops_do(ZRootsIteratorClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRoots); |
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_threads.oops_do(cl); |
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} |