author | rehn |
Thu, 14 Jun 2018 07:26:27 +0200 | |
changeset 50556 | e5a40146791b |
parent 50525 | 767cdb97f103 |
child 50875 | 2217b2fc29ea |
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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|
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#include "precompiled.hpp" |
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#include "classfile/classLoaderData.hpp" |
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#include "classfile/stringTable.hpp" |
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#include "classfile/symbolTable.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 ZSubPhasePauseRootsVMWeakHandles("Pause Roots VMWeakHandles"); |
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static const ZStatSubPhase ZSubPhasePauseRootsJNIHandles("Pause Roots JNIHandles"); |
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static const ZStatSubPhase ZSubPhasePauseRootsJNIWeakHandles("Pause Roots JNIWeakHandles"); |
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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 ZSubPhasePauseRootsJFRWeak("Pause Roots JRFWeak"); |
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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 ZSubPhasePauseRootsStringTable("Pause Roots StringTable"); |
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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 ZSubPhasePauseWeakRootsVMWeakHandles("Pause Weak Roots VMWeakHandles"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRootsJNIWeakHandles("Pause Weak Roots JNIWeakHandles"); |
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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 ZSubPhasePauseWeakRootsSymbolTable("Pause Weak Roots SymbolTable"); |
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static const ZStatSubPhase ZSubPhasePauseWeakRootsStringTable("Pause Weak Roots StringTable"); |
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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)(OopClosure*)> |
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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)(OopClosure*)> |
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void ZSerialOopsDo<T, F>::oops_do(OopClosure* 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)(OopClosure*)> |
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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)(OopClosure*)> |
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void ZParallelOopsDo<T, F>::oops_do(OopClosure* 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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|
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template <typename T, void (T::*F)(BoolObjectClosure*, OopClosure*)> |
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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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|
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template <typename T, void (T::*F)(BoolObjectClosure*, OopClosure*)> |
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void ZSerialWeakOopsDo<T, F>::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* 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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|
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template <typename T, void (T::*F)(BoolObjectClosure*, OopClosure*)> |
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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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|
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template <typename T, void (T::*F)(BoolObjectClosure*, OopClosure*)> |
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void ZParallelWeakOopsDo<T, F>::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* 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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138 |
|
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ZRootsIterator::ZRootsIterator() : |
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_vm_weak_handles_iter(SystemDictionary::vm_weak_oop_storage()), |
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_jni_handles_iter(JNIHandles::global_handles()), |
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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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_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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_jfr_weak(this), |
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_system_dictionary(this), |
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_vm_weak_handles(this), |
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_jni_handles(this), |
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_jni_weak_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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_string_table(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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166 |
|
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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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176 |
|
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void ZRootsIterator::do_universe(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsUniverse); |
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Universe::oops_do(cl); |
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} |
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181 |
|
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void ZRootsIterator::do_vm_weak_handles(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsVMWeakHandles); |
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_vm_weak_handles_iter.oops_do(cl); |
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} |
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186 |
|
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void ZRootsIterator::do_jni_handles(OopClosure* 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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191 |
|
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void ZRootsIterator::do_jni_weak_handles(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsJNIWeakHandles); |
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_jni_weak_handles_iter.oops_do(cl); |
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} |
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|
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void ZRootsIterator::do_object_synchronizer(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsObjectSynchronizer); |
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ObjectSynchronizer::oops_do(cl); |
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} |
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|
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void ZRootsIterator::do_management(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsManagement); |
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Management::oops_do(cl); |
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} |
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|
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void ZRootsIterator::do_jvmti_export(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsJVMTIExport); |
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JvmtiExport::oops_do(cl); |
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} |
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|
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void ZRootsIterator::do_jvmti_weak_export(OopClosure* 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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|
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void ZRootsIterator::do_jfr_weak(OopClosure* cl) { |
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#if INCLUDE_JFR |
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ZStatTimer timer(ZSubPhasePauseRootsJFRWeak); |
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AlwaysTrueClosure always_alive; |
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Jfr::weak_oops_do(&always_alive, cl); |
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#endif |
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} |
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|
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void ZRootsIterator::do_system_dictionary(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsSystemDictionary); |
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SystemDictionary::oops_do(cl); |
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} |
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|
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void ZRootsIterator::do_class_loader_data_graph(OopClosure* 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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|
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class ZRootsIteratorThreadClosure : public ThreadClosure { |
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private: |
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OopClosure* const _cl; |
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|
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public: |
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ZRootsIteratorThreadClosure(OopClosure* cl) : |
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_cl(cl) {} |
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|
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virtual void do_thread(Thread* thread) { |
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if (thread->is_Java_thread()) { |
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// Update thread local adddress bad mask |
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ZThreadLocalData::set_address_bad_mask(thread, ZAddressBadMask); |
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} |
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|
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// Process thread oops |
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thread->oops_do(_cl, NULL); |
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} |
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}; |
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|
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void ZRootsIterator::do_threads(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsThreads); |
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ResourceMark rm; |
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ZRootsIteratorThreadClosure thread_cl(cl); |
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Threads::possibly_parallel_threads_do(true, &thread_cl); |
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} |
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|
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void ZRootsIterator::do_code_cache(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsCodeCache); |
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ZNMethodTable::oops_do(cl); |
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} |
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|
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void ZRootsIterator::do_string_table(OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseRootsStringTable); |
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_string_table_iter.oops_do(cl); |
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} |
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|
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void ZRootsIterator::oops_do(OopClosure* 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 (!ZWeakRoots) { |
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_jvmti_weak_export.oops_do(cl); |
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_jfr_weak.oops_do(cl); |
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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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} else { |
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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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|
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ZWeakRootsIterator::ZWeakRootsIterator() : |
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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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_jvmti_weak_export(this), |
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_jfr_weak(this), |
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_vm_weak_handles(this), |
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_jni_weak_handles(this), |
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_symbol_table(this), |
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_string_table(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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SymbolTable::clear_parallel_claimed_index(); |
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StringTable::reset_dead_counter(); |
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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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StringTable::finish_dead_counter(); |
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} |
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|
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void ZWeakRootsIterator::do_vm_weak_handles(BoolObjectClosure* is_alive, OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseWeakRootsVMWeakHandles); |
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_vm_weak_handles_iter.weak_oops_do(is_alive, cl); |
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} |
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|
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void ZWeakRootsIterator::do_jni_weak_handles(BoolObjectClosure* is_alive, OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseWeakRootsJNIWeakHandles); |
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_jni_weak_handles_iter.weak_oops_do(is_alive, cl); |
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} |
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|
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void ZWeakRootsIterator::do_jvmti_weak_export(BoolObjectClosure* is_alive, OopClosure* 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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332 |
|
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333 |
void ZWeakRootsIterator::do_jfr_weak(BoolObjectClosure* is_alive, OopClosure* cl) { |
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334 |
#if INCLUDE_JFR |
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ZStatTimer timer(ZSubPhasePauseWeakRootsJFRWeak); |
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336 |
Jfr::weak_oops_do(is_alive, cl); |
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337 |
#endif |
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338 |
} |
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339 |
|
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340 |
void ZWeakRootsIterator::do_symbol_table(BoolObjectClosure* is_alive, OopClosure* cl) { |
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ZStatTimer timer(ZSubPhasePauseWeakRootsSymbolTable); |
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342 |
int dummy; |
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343 |
SymbolTable::possibly_parallel_unlink(&dummy, &dummy); |
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344 |
} |
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345 |
|
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346 |
class ZStringTableDeadCounterBoolObjectClosure : public BoolObjectClosure { |
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private: |
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348 |
BoolObjectClosure* const _cl; |
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size_t _ndead; |
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350 |
|
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351 |
public: |
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352 |
ZStringTableDeadCounterBoolObjectClosure(BoolObjectClosure* cl) : |
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353 |
_cl(cl), |
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354 |
_ndead(0) {} |
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355 |
|
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356 |
~ZStringTableDeadCounterBoolObjectClosure() { |
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357 |
StringTable::inc_dead_counter(_ndead); |
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358 |
} |
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359 |
|
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360 |
virtual bool do_object_b(oop obj) { |
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361 |
if (_cl->do_object_b(obj)) { |
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362 |
return true; |
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363 |
} |
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364 |
|
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365 |
_ndead++; |
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366 |
return false; |
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367 |
} |
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368 |
}; |
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369 |
|
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370 |
void ZWeakRootsIterator::do_string_table(BoolObjectClosure* is_alive, OopClosure* cl) { |
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371 |
ZStatTimer timer(ZSubPhasePauseWeakRootsStringTable); |
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372 |
ZStringTableDeadCounterBoolObjectClosure counter_is_alive(is_alive); |
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373 |
_string_table_iter.weak_oops_do(&counter_is_alive, cl); |
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374 |
} |
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375 |
|
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376 |
void ZWeakRootsIterator::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* cl) { |
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377 |
ZStatTimer timer(ZSubPhasePauseWeakRoots); |
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378 |
if (ZSymbolTableUnloading) { |
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|
379 |
_symbol_table.weak_oops_do(is_alive, cl); |
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380 |
} |
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381 |
if (ZWeakRoots) { |
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|
382 |
_jvmti_weak_export.weak_oops_do(is_alive, cl); |
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|
383 |
_jfr_weak.weak_oops_do(is_alive, cl); |
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|
384 |
if (!ZConcurrentVMWeakHandles) { |
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|
385 |
_vm_weak_handles.weak_oops_do(is_alive, cl); |
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386 |
} |
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|
387 |
if (!ZConcurrentJNIWeakGlobalHandles) { |
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|
388 |
_jni_weak_handles.weak_oops_do(is_alive, cl); |
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|
389 |
} |
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|
390 |
if (!ZConcurrentStringTable) { |
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|
391 |
_string_table.weak_oops_do(is_alive, cl); |
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|
392 |
} |
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|
393 |
} |
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|
394 |
} |
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|
395 |
|
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|
396 |
void ZWeakRootsIterator::oops_do(OopClosure* cl) { |
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|
397 |
AlwaysTrueClosure always_alive; |
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|
398 |
weak_oops_do(&always_alive, cl); |
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|
399 |
} |
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|
400 |
|
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|
401 |
ZConcurrentWeakRootsIterator::ZConcurrentWeakRootsIterator() : |
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|
402 |
_vm_weak_handles_iter(SystemDictionary::vm_weak_oop_storage()), |
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|
403 |
_jni_weak_handles_iter(JNIHandles::weak_global_handles()), |
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|
404 |
_string_table_iter(StringTable::weak_storage()), |
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|
405 |
_vm_weak_handles(this), |
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|
406 |
_jni_weak_handles(this), |
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|
407 |
_string_table(this) { |
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|
408 |
StringTable::reset_dead_counter(); |
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|
409 |
} |
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|
410 |
|
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|
411 |
ZConcurrentWeakRootsIterator::~ZConcurrentWeakRootsIterator() { |
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|
412 |
StringTable::finish_dead_counter(); |
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|
413 |
} |
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|
414 |
|
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|
415 |
void ZConcurrentWeakRootsIterator::do_vm_weak_handles(OopClosure* cl) { |
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|
416 |
ZStatTimer timer(ZSubPhaseConcurrentWeakRootsVMWeakHandles); |
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|
417 |
_vm_weak_handles_iter.oops_do(cl); |
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|
418 |
} |
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|
419 |
|
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|
420 |
void ZConcurrentWeakRootsIterator::do_jni_weak_handles(OopClosure* cl) { |
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|
421 |
ZStatTimer timer(ZSubPhaseConcurrentWeakRootsJNIWeakHandles); |
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|
422 |
_jni_weak_handles_iter.oops_do(cl); |
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|
423 |
} |
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|
424 |
|
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|
425 |
class ZStringTableDeadCounterOopClosure : public OopClosure { |
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|
426 |
private: |
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|
427 |
OopClosure* const _cl; |
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|
428 |
size_t _ndead; |
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|
429 |
|
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|
430 |
public: |
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|
431 |
ZStringTableDeadCounterOopClosure(OopClosure* cl) : |
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|
432 |
_cl(cl), |
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|
433 |
_ndead(0) {} |
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|
434 |
|
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|
435 |
~ZStringTableDeadCounterOopClosure() { |
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|
436 |
StringTable::inc_dead_counter(_ndead); |
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|
437 |
} |
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|
438 |
|
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|
439 |
virtual void do_oop(oop* p) { |
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|
440 |
_cl->do_oop(p); |
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|
441 |
if (*p == NULL) { |
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|
442 |
_ndead++; |
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|
443 |
} |
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|
444 |
} |
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|
445 |
|
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|
446 |
virtual void do_oop(narrowOop* p) { |
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|
447 |
ShouldNotReachHere(); |
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|
448 |
} |
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8204613: StringTable: Calculates wrong number of uncleaned items.
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parents:
50525
diff
changeset
|
449 |
}; |
e5a40146791b
8204613: StringTable: Calculates wrong number of uncleaned items.
rehn
parents:
50525
diff
changeset
|
450 |
|
50525
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
451 |
void ZConcurrentWeakRootsIterator::do_string_table(OopClosure* cl) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
452 |
ZStatTimer timer(ZSubPhaseConcurrentWeakRootsStringTable); |
50556
e5a40146791b
8204613: StringTable: Calculates wrong number of uncleaned items.
rehn
parents:
50525
diff
changeset
|
453 |
ZStringTableDeadCounterOopClosure counter_cl(cl); |
e5a40146791b
8204613: StringTable: Calculates wrong number of uncleaned items.
rehn
parents:
50525
diff
changeset
|
454 |
_string_table_iter.oops_do(&counter_cl); |
50525
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
455 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
456 |
|
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
457 |
void ZConcurrentWeakRootsIterator::oops_do(OopClosure* cl) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
458 |
ZStatTimer timer(ZSubPhaseConcurrentWeakRoots); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
459 |
if (ZWeakRoots) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
460 |
if (ZConcurrentVMWeakHandles) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
461 |
_vm_weak_handles.oops_do(cl); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
462 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
463 |
if (ZConcurrentJNIWeakGlobalHandles) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
464 |
_jni_weak_handles.oops_do(cl); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
465 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
466 |
if (ZConcurrentStringTable) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
467 |
_string_table.oops_do(cl); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
468 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
469 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
470 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
471 |
|
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
472 |
ZThreadRootsIterator::ZThreadRootsIterator() : |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
473 |
_threads(this) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
474 |
assert(SafepointSynchronize::is_at_safepoint(), "Should be at safepoint"); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
475 |
ZStatTimer timer(ZSubPhasePauseRootsSetup); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
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changeset
|
476 |
Threads::change_thread_claim_parity(); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
477 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
478 |
|
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
479 |
ZThreadRootsIterator::~ZThreadRootsIterator() { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
480 |
ZStatTimer timer(ZSubPhasePauseRootsTeardown); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
481 |
Threads::assert_all_threads_claimed(); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
482 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
483 |
|
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
484 |
void ZThreadRootsIterator::do_threads(OopClosure* cl) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
485 |
ZStatTimer timer(ZSubPhasePauseRootsThreads); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
486 |
ResourceMark rm; |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
487 |
Threads::possibly_parallel_oops_do(true, cl, NULL); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
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parents:
diff
changeset
|
488 |
} |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
489 |
|
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
490 |
void ZThreadRootsIterator::oops_do(OopClosure* cl) { |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
491 |
ZStatTimer timer(ZSubPhasePauseRoots); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
492 |
_threads.oops_do(cl); |
767cdb97f103
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
pliden
parents:
diff
changeset
|
493 |
} |