author | johnc |
Tue, 20 Sep 2011 15:39:17 -0700 | |
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/* |
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* Copyright (c) 2001, 2011, 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_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |
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#define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |
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class HeapRegion; |
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class G1CollectedHeap; |
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class G1RemSet; |
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class ConcurrentMark; |
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class DirtyCardToOopClosure; |
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class CMBitMap; |
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class CMMarkStack; |
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class G1ParScanThreadState; |
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class CMTask; |
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// A class that scans oops in a given heap region (much as OopsInGenClosure |
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// scans oops in a generation.) |
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class OopsInHeapRegionClosure: public OopsInGenClosure { |
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protected: |
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HeapRegion* _from; |
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public: |
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void set_region(HeapRegion* from) { _from = from; } |
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}; |
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class G1ParClosureSuper : public OopsInHeapRegionClosure { |
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protected: |
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G1CollectedHeap* _g1; |
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G1RemSet* _g1_rem; |
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ConcurrentMark* _cm; |
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G1ParScanThreadState* _par_scan_state; |
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bool _during_initial_mark; |
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bool _mark_in_progress; |
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public: |
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G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); |
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bool apply_to_weak_ref_discovered_field() { return true; } |
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}; |
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class G1ParPushHeapRSClosure : public G1ParClosureSuper { |
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public: |
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G1ParPushHeapRSClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : |
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G1ParClosureSuper(g1, par_scan_state) { } |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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}; |
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class G1ParScanClosure : public G1ParClosureSuper { |
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public: |
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G1ParScanClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : |
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G1ParClosureSuper(g1, par_scan_state) { } |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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}; |
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#define G1_PARTIAL_ARRAY_MASK 0x2 |
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template <class T> inline bool has_partial_array_mask(T* ref) { |
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return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK; |
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} |
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template <class T> inline T* set_partial_array_mask(T obj) { |
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assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!"); |
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return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK); |
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} |
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template <class T> inline oop clear_partial_array_mask(T* ref) { |
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return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK); |
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} |
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class G1ParScanPartialArrayClosure : public G1ParClosureSuper { |
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G1ParScanClosure _scanner; |
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public: |
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G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : |
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G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state) { } |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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}; |
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class G1ParCopyHelper : public G1ParClosureSuper { |
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G1ParScanClosure *_scanner; |
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protected: |
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template <class T> void mark_object(T* p); |
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oop copy_to_survivor_space(oop obj, bool should_mark_root, |
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bool should_mark_copy); |
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public: |
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G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, |
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G1ParScanClosure *scanner) : |
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G1ParClosureSuper(g1, par_scan_state), _scanner(scanner) { } |
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}; |
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template<bool do_gen_barrier, G1Barrier barrier, |
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bool do_mark_object> |
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class G1ParCopyClosure : public G1ParCopyHelper { |
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G1ParScanClosure _scanner; |
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template <class T> void do_oop_work(T* p); |
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public: |
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G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : |
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_scanner(g1, par_scan_state), G1ParCopyHelper(g1, par_scan_state, &_scanner) { } |
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template <class T> void do_oop_nv(T* p) { |
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do_oop_work(p); |
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} |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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}; |
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typedef G1ParCopyClosure<false, G1BarrierNone, false> G1ParScanExtRootClosure; |
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typedef G1ParCopyClosure<true, G1BarrierNone, false> G1ParScanPermClosure; |
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typedef G1ParCopyClosure<false, G1BarrierRS, false> G1ParScanHeapRSClosure; |
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typedef G1ParCopyClosure<false, G1BarrierNone, true> G1ParScanAndMarkExtRootClosure; |
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typedef G1ParCopyClosure<true, G1BarrierNone, true> G1ParScanAndMarkPermClosure; |
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typedef G1ParCopyClosure<false, G1BarrierRS, true> G1ParScanAndMarkHeapRSClosure; |
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// This is the only case when we set skip_cset_test. Basically, this |
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// closure is (should?) only be called directly while we're draining |
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// the overflow and task queues. In that case we know that the |
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// reference in question points into the collection set, otherwise we |
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// would not have pushed it on the queue. The following is defined in |
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// g1_specialized_oop_closures.hpp. |
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// typedef G1ParCopyClosure<false, G1BarrierEvac, false, true> G1ParScanHeapEvacClosure; |
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// We need a separate closure to handle references during evacuation |
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// failure processing, as we cannot asume that the reference already |
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// points into the collection set (like G1ParScanHeapEvacClosure does). |
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typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacFailureClosure; |
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class FilterIntoCSClosure: public OopClosure { |
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G1CollectedHeap* _g1; |
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OopClosure* _oc; |
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DirtyCardToOopClosure* _dcto_cl; |
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public: |
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FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl, |
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G1CollectedHeap* g1, OopClosure* oc) : |
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_dcto_cl(dcto_cl), _g1(g1), _oc(oc) |
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{} |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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bool apply_to_weak_ref_discovered_field() { return true; } |
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bool do_header() { return false; } |
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}; |
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class FilterOutOfRegionClosure: public OopClosure { |
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HeapWord* _r_bottom; |
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HeapWord* _r_end; |
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OopClosure* _oc; |
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int _out_of_region; |
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public: |
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FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc); |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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bool apply_to_weak_ref_discovered_field() { return true; } |
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bool do_header() { return false; } |
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int out_of_region() { return _out_of_region; } |
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}; |
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// Closure for iterating over object fields during concurrent marking |
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class G1CMOopClosure : public OopClosure { |
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G1CollectedHeap* _g1h; |
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ConcurrentMark* _cm; |
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CMTask* _task; |
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public: |
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G1CMOopClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, CMTask* task); |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop( oop* p) { do_oop_nv(p); } |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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}; |
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#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |