author | tschatzl |
Thu, 06 Dec 2018 13:55:22 +0100 | |
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parent 52349 | f34a2e0069c7 |
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/* |
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* Copyright (c) 2001, 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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#ifndef SHARE_VM_GC_G1_G1OOPCLOSURES_HPP |
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#define SHARE_VM_GC_G1_G1OOPCLOSURES_HPP |
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#include "gc/g1/g1InCSetState.hpp" |
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#include "memory/iterator.hpp" |
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#include "oops/markOop.hpp" |
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class HeapRegion; |
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class G1CollectedHeap; |
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class G1RemSet; |
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class G1ConcurrentMark; |
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class DirtyCardToOopClosure; |
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class G1CMBitMap; |
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class G1ParScanThreadState; |
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class G1ScanEvacuatedObjClosure; |
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class G1CMTask; |
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class ReferenceProcessor; |
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class G1ScanClosureBase : public BasicOopIterateClosure { |
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protected: |
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G1CollectedHeap* _g1h; |
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G1ParScanThreadState* _par_scan_state; |
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G1ScanClosureBase(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state); |
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~G1ScanClosureBase() { } |
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template <class T> |
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inline void prefetch_and_push(T* p, oop const obj); |
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template <class T> |
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inline void handle_non_cset_obj_common(InCSetState const state, T* p, oop const obj); |
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public: |
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virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; } |
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inline void trim_queue_partially(); |
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}; |
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// Used during the Update RS phase to refine remaining cards in the DCQ during garbage collection. |
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class G1ScanObjsDuringUpdateRSClosure : public G1ScanClosureBase { |
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public: |
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G1ScanObjsDuringUpdateRSClosure(G1CollectedHeap* g1h, |
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G1ParScanThreadState* pss) : |
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G1ScanClosureBase(g1h, pss) { } |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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virtual void do_oop(oop* p) { do_oop_work(p); } |
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}; |
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// Used during the Scan RS phase to scan cards from the remembered set during garbage collection. |
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class G1ScanObjsDuringScanRSClosure : public G1ScanClosureBase { |
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public: |
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G1ScanObjsDuringScanRSClosure(G1CollectedHeap* g1h, |
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G1ParScanThreadState* par_scan_state): |
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G1ScanClosureBase(g1h, par_scan_state) { } |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop(oop* p) { do_oop_work(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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}; |
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// This closure is applied to the fields of the objects that have just been copied during evacuation. |
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class G1ScanEvacuatedObjClosure : public G1ScanClosureBase { |
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friend class G1ScanInYoungSetter; |
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enum ScanningInYoungValues { |
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False = 0, |
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True, |
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Uninitialized |
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}; |
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ScanningInYoungValues _scanning_in_young; |
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public: |
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G1ScanEvacuatedObjClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) : |
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G1ScanClosureBase(g1h, par_scan_state), _scanning_in_young(Uninitialized) { } |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop(oop* p) { do_oop_work(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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// We need to do reference discovery while processing evacuated objects. |
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virtual ReferenceIterationMode reference_iteration_mode() { return DO_DISCOVERED_AND_DISCOVERY; } |
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void set_ref_discoverer(ReferenceDiscoverer* rd) { |
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set_ref_discoverer_internal(rd); |
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} |
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}; |
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// RAII object to properly set the _scanning_in_young field in G1ScanEvacuatedObjClosure. |
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class G1ScanInYoungSetter : public StackObj { |
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G1ScanEvacuatedObjClosure* _closure; |
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public: |
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G1ScanInYoungSetter(G1ScanEvacuatedObjClosure* closure, bool new_value) : _closure(closure) { |
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assert(_closure->_scanning_in_young == G1ScanEvacuatedObjClosure::Uninitialized, "Must not be set"); |
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_closure->_scanning_in_young = new_value ? G1ScanEvacuatedObjClosure::True : G1ScanEvacuatedObjClosure::False; |
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} |
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~G1ScanInYoungSetter() { |
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DEBUG_ONLY(_closure->_scanning_in_young = G1ScanEvacuatedObjClosure::Uninitialized;) |
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} |
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}; |
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// Add back base class for metadata |
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class G1ParCopyHelper : public OopClosure { |
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protected: |
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G1CollectedHeap* _g1h; |
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G1ParScanThreadState* _par_scan_state; |
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uint _worker_id; // Cache value from par_scan_state. |
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ClassLoaderData* _scanned_cld; |
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G1ConcurrentMark* _cm; |
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// Mark the object if it's not already marked. This is used to mark |
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// objects pointed to by roots that are guaranteed not to move |
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// during the GC (i.e., non-CSet objects). It is MT-safe. |
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inline void mark_object(oop obj); |
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G1ParCopyHelper(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state); |
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~G1ParCopyHelper() { } |
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public: |
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void set_scanned_cld(ClassLoaderData* cld) { _scanned_cld = cld; } |
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inline void do_cld_barrier(oop new_obj); |
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inline void trim_queue_partially(); |
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}; |
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enum G1Barrier { |
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G1BarrierNone, |
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G1BarrierCLD |
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}; |
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enum G1Mark { |
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G1MarkNone, |
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G1MarkFromRoot, |
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G1MarkPromotedFromRoot |
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}; |
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template <G1Barrier barrier, G1Mark do_mark_object> |
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class G1ParCopyClosure : public G1ParCopyHelper { |
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public: |
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G1ParCopyClosure(G1CollectedHeap* g1h, G1ParScanThreadState* par_scan_state) : |
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G1ParCopyHelper(g1h, par_scan_state) { } |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop(oop* p) { do_oop_work(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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}; |
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class G1CLDScanClosure : public CLDClosure { |
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G1ParCopyHelper* _closure; |
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bool _process_only_dirty; |
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int _claim; |
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int _count; |
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public: |
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G1CLDScanClosure(G1ParCopyHelper* closure, |
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bool process_only_dirty, int claim_value) |
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: _closure(closure), _process_only_dirty(process_only_dirty), _claim(claim_value), _count(0) {} |
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void do_cld(ClassLoaderData* cld); |
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}; |
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// Closure for iterating over object fields during concurrent marking |
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class G1CMOopClosure : public MetadataVisitingOopIterateClosure { |
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G1CollectedHeap* _g1h; |
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G1CMTask* _task; |
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public: |
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G1CMOopClosure(G1CollectedHeap* g1h,G1CMTask* task); |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop( oop* p) { do_oop_work(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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}; |
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// Closure to scan the root regions during concurrent marking |
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class G1RootRegionScanClosure : public MetadataVisitingOopIterateClosure { |
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private: |
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G1CollectedHeap* _g1h; |
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G1ConcurrentMark* _cm; |
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uint _worker_id; |
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public: |
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G1RootRegionScanClosure(G1CollectedHeap* g1h, G1ConcurrentMark* cm, uint worker_id) : |
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_g1h(g1h), _cm(cm), _worker_id(worker_id) { } |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop( oop* p) { do_oop_work(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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}; |
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class G1ConcurrentRefineOopClosure: public BasicOopIterateClosure { |
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G1CollectedHeap* _g1h; |
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uint _worker_i; |
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public: |
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G1ConcurrentRefineOopClosure(G1CollectedHeap* g1h, uint worker_i) : |
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_g1h(g1h), |
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_worker_i(worker_i) { |
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} |
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virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; } |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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virtual void do_oop(oop* p) { do_oop_work(p); } |
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}; |
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class G1RebuildRemSetClosure : public BasicOopIterateClosure { |
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G1CollectedHeap* _g1h; |
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uint _worker_id; |
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public: |
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G1RebuildRemSetClosure(G1CollectedHeap* g1h, uint worker_id) : _g1h(g1h), _worker_id(worker_id) { |
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} |
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template <class T> void do_oop_work(T* p); |
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virtual void do_oop(oop* p) { do_oop_work(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; } |
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}; |
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|
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#endif // SHARE_VM_GC_G1_G1OOPCLOSURES_HPP |