author | stefank |
Mon, 07 Jul 2014 10:12:40 +0200 | |
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/* |
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* Copyright (c) 2001, 2014, 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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#include "memory/iterator.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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class ReferenceProcessor; |
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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 ExtendedOopClosure { |
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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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G1ParScanThreadState* _par_scan_state; |
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uint _worker_id; |
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public: |
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// Initializes the instance, leaving _par_scan_state uninitialized. Must be done |
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// later using the set_par_scan_thread_state() method. |
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G1ParClosureSuper(G1CollectedHeap* g1); |
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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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void set_par_scan_thread_state(G1ParScanThreadState* par_scan_state); |
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}; |
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class G1ParPushHeapRSClosure : public G1ParClosureSuper { |
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public: |
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G1ParPushHeapRSClosure(G1CollectedHeap* g1, |
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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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G1ParScanClosure(G1CollectedHeap* g1, ReferenceProcessor* rp) : |
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G1ParClosureSuper(g1) { |
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assert(_ref_processor == NULL, "sanity"); |
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_ref_processor = rp; |
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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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}; |
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// Add back base class for metadata |
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class G1ParCopyHelper : public G1ParClosureSuper { |
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protected: |
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Klass* _scanned_klass; |
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ConcurrentMark* _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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void mark_object(oop obj); |
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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 have been forwarded during a |
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// GC. It is MT-safe. |
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void mark_forwarded_object(oop from_obj, oop to_obj); |
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public: |
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G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); |
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void set_scanned_klass(Klass* k) { _scanned_klass = k; } |
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template <class T> void do_klass_barrier(T* p, oop new_obj); |
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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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private: |
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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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ReferenceProcessor* rp) : |
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G1ParCopyHelper(g1, par_scan_state) { |
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assert(_ref_processor == NULL, "sanity"); |
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} |
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template <class T> void do_oop_nv(T* p) { do_oop_work(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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G1CollectedHeap* g1() { return _g1; }; |
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G1ParScanThreadState* pss() { return _par_scan_state; } |
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ReferenceProcessor* rp() { return _ref_processor; }; |
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}; |
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typedef G1ParCopyClosure<G1BarrierNone, G1MarkNone> G1ParScanExtRootClosure; |
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typedef G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> G1ParScanAndMarkExtRootClosure; |
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typedef G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> G1ParScanAndMarkWeakExtRootClosure; |
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// We use a separate closure to handle references during evacuation |
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// failure processing. |
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typedef G1ParCopyClosure<G1BarrierEvac, G1MarkNone> G1ParScanHeapEvacFailureClosure; |
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class FilterIntoCSClosure: public ExtendedOopClosure { |
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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, |
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OopClosure* oc) : |
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_dcto_cl(dcto_cl), _g1(g1), _oc(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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}; |
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class FilterOutOfRegionClosure: public ExtendedOopClosure { |
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HeapWord* _r_bottom; |
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HeapWord* _r_end; |
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OopClosure* _oc; |
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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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}; |
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// Closure for iterating over object fields during concurrent marking |
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class G1CMOopClosure : public MetadataAwareOopClosure { |
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protected: |
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ConcurrentMark* _cm; |
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G1CollectedHeap* _g1h; |
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CMTask* _task; |
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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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// Closure to scan the root regions during concurrent marking |
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class G1RootRegionScanClosure : public MetadataAwareOopClosure { |
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private: |
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G1CollectedHeap* _g1h; |
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ConcurrentMark* _cm; |
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uint _worker_id; |
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G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, |
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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_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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// Closure that applies the given two closures in sequence. |
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// Used by the RSet refinement code (when updating RSets |
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// during an evacuation pause) to record cards containing |
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// pointers into the collection set. |
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class G1Mux2Closure : public ExtendedOopClosure { |
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OopClosure* _c1; |
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OopClosure* _c2; |
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public: |
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G1Mux2Closure(OopClosure *c1, OopClosure *c2); |
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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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// A closure that returns true if it is actually applied |
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// to a reference |
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class G1TriggerClosure : public ExtendedOopClosure { |
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bool _triggered; |
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G1TriggerClosure(); |
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bool triggered() const { return _triggered; } |
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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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// A closure which uses a triggering closure to determine |
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// whether to apply an oop closure. |
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class G1InvokeIfNotTriggeredClosure: public ExtendedOopClosure { |
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G1TriggerClosure* _trigger_cl; |
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OopClosure* _oop_cl; |
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public: |
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G1InvokeIfNotTriggeredClosure(G1TriggerClosure* t, 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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}; |
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class G1UpdateRSOrPushRefOopClosure: public ExtendedOopClosure { |
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G1CollectedHeap* _g1; |
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G1RemSet* _g1_rem_set; |
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HeapRegion* _from; |
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OopsInHeapRegionClosure* _push_ref_cl; |
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bool _record_refs_into_cset; |
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uint _worker_i; |
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public: |
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G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h, |
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G1RemSet* rs, |
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OopsInHeapRegionClosure* push_ref_cl, |
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bool record_refs_into_cset, |
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uint worker_i = 0); |
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void set_from(HeapRegion* from) { |
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assert(from != NULL, "from region must be non-NULL"); |
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_from = from; |
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} |
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bool self_forwarded(oop obj) { |
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bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); |
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return result; |
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} |
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bool apply_to_weak_ref_discovered_field() { return true; } |
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template <class T> void do_oop_nv(T* p); |
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virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
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virtual void do_oop(oop* p) { do_oop_nv(p); } |
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}; |
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#endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |