| /* |
| * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |
| #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |
| |
| #include "memory/iterator.hpp" |
| |
| class HeapRegion; |
| class G1CollectedHeap; |
| class G1RemSet; |
| class ConcurrentMark; |
| class DirtyCardToOopClosure; |
| class CMBitMap; |
| class CMMarkStack; |
| class G1ParScanThreadState; |
| class CMTask; |
| class ReferenceProcessor; |
| |
| // A class that scans oops in a given heap region (much as OopsInGenClosure |
| // scans oops in a generation.) |
| class OopsInHeapRegionClosure: public ExtendedOopClosure { |
| protected: |
| HeapRegion* _from; |
| public: |
| void set_region(HeapRegion* from) { _from = from; } |
| }; |
| |
| class G1ParClosureSuper : public OopsInHeapRegionClosure { |
| protected: |
| G1CollectedHeap* _g1; |
| G1ParScanThreadState* _par_scan_state; |
| uint _worker_id; |
| public: |
| // Initializes the instance, leaving _par_scan_state uninitialized. Must be done |
| // later using the set_par_scan_thread_state() method. |
| G1ParClosureSuper(G1CollectedHeap* g1); |
| G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); |
| bool apply_to_weak_ref_discovered_field() { return true; } |
| |
| void set_par_scan_thread_state(G1ParScanThreadState* par_scan_state); |
| }; |
| |
| class G1ParPushHeapRSClosure : public G1ParClosureSuper { |
| public: |
| G1ParPushHeapRSClosure(G1CollectedHeap* g1, |
| G1ParScanThreadState* par_scan_state): |
| G1ParClosureSuper(g1, par_scan_state) { } |
| |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| class G1ParScanClosure : public G1ParClosureSuper { |
| public: |
| G1ParScanClosure(G1CollectedHeap* g1, ReferenceProcessor* rp) : |
| G1ParClosureSuper(g1) { |
| assert(_ref_processor == NULL, "sanity"); |
| _ref_processor = rp; |
| } |
| |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| // Add back base class for metadata |
| class G1ParCopyHelper : public G1ParClosureSuper { |
| protected: |
| Klass* _scanned_klass; |
| ConcurrentMark* _cm; |
| |
| // Mark the object if it's not already marked. This is used to mark |
| // objects pointed to by roots that are guaranteed not to move |
| // during the GC (i.e., non-CSet objects). It is MT-safe. |
| void mark_object(oop obj); |
| |
| // Mark the object if it's not already marked. This is used to mark |
| // objects pointed to by roots that have been forwarded during a |
| // GC. It is MT-safe. |
| void mark_forwarded_object(oop from_obj, oop to_obj); |
| public: |
| G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); |
| |
| void set_scanned_klass(Klass* k) { _scanned_klass = k; } |
| template <class T> void do_klass_barrier(T* p, oop new_obj); |
| }; |
| |
| template <G1Barrier barrier, G1Mark do_mark_object> |
| class G1ParCopyClosure : public G1ParCopyHelper { |
| private: |
| template <class T> void do_oop_work(T* p); |
| |
| public: |
| G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, |
| ReferenceProcessor* rp) : |
| G1ParCopyHelper(g1, par_scan_state) { |
| assert(_ref_processor == NULL, "sanity"); |
| } |
| |
| template <class T> void do_oop_nv(T* p) { do_oop_work(p); } |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| |
| G1CollectedHeap* g1() { return _g1; }; |
| G1ParScanThreadState* pss() { return _par_scan_state; } |
| ReferenceProcessor* rp() { return _ref_processor; }; |
| }; |
| |
| typedef G1ParCopyClosure<G1BarrierNone, G1MarkNone> G1ParScanExtRootClosure; |
| typedef G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> G1ParScanAndMarkExtRootClosure; |
| typedef G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> G1ParScanAndMarkWeakExtRootClosure; |
| // We use a separate closure to handle references during evacuation |
| // failure processing. |
| |
| typedef G1ParCopyClosure<G1BarrierEvac, G1MarkNone> G1ParScanHeapEvacFailureClosure; |
| |
| class FilterIntoCSClosure: public ExtendedOopClosure { |
| G1CollectedHeap* _g1; |
| OopClosure* _oc; |
| DirtyCardToOopClosure* _dcto_cl; |
| public: |
| FilterIntoCSClosure( DirtyCardToOopClosure* dcto_cl, |
| G1CollectedHeap* g1, |
| OopClosure* oc) : |
| _dcto_cl(dcto_cl), _g1(g1), _oc(oc) { } |
| |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| bool apply_to_weak_ref_discovered_field() { return true; } |
| }; |
| |
| class FilterOutOfRegionClosure: public ExtendedOopClosure { |
| HeapWord* _r_bottom; |
| HeapWord* _r_end; |
| OopClosure* _oc; |
| public: |
| FilterOutOfRegionClosure(HeapRegion* r, OopClosure* oc); |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| bool apply_to_weak_ref_discovered_field() { return true; } |
| }; |
| |
| // Closure for iterating over object fields during concurrent marking |
| class G1CMOopClosure : public MetadataAwareOopClosure { |
| protected: |
| ConcurrentMark* _cm; |
| private: |
| G1CollectedHeap* _g1h; |
| CMTask* _task; |
| public: |
| G1CMOopClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, CMTask* task); |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop( oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| // Closure to scan the root regions during concurrent marking |
| class G1RootRegionScanClosure : public MetadataAwareOopClosure { |
| private: |
| G1CollectedHeap* _g1h; |
| ConcurrentMark* _cm; |
| uint _worker_id; |
| public: |
| G1RootRegionScanClosure(G1CollectedHeap* g1h, ConcurrentMark* cm, |
| uint worker_id) : |
| _g1h(g1h), _cm(cm), _worker_id(worker_id) { } |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop( oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| // Closure that applies the given two closures in sequence. |
| // Used by the RSet refinement code (when updating RSets |
| // during an evacuation pause) to record cards containing |
| // pointers into the collection set. |
| |
| class G1Mux2Closure : public ExtendedOopClosure { |
| OopClosure* _c1; |
| OopClosure* _c2; |
| public: |
| G1Mux2Closure(OopClosure *c1, OopClosure *c2); |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| // A closure that returns true if it is actually applied |
| // to a reference |
| |
| class G1TriggerClosure : public ExtendedOopClosure { |
| bool _triggered; |
| public: |
| G1TriggerClosure(); |
| bool triggered() const { return _triggered; } |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| // A closure which uses a triggering closure to determine |
| // whether to apply an oop closure. |
| |
| class G1InvokeIfNotTriggeredClosure: public ExtendedOopClosure { |
| G1TriggerClosure* _trigger_cl; |
| OopClosure* _oop_cl; |
| public: |
| G1InvokeIfNotTriggeredClosure(G1TriggerClosure* t, OopClosure* oc); |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| }; |
| |
| class G1UpdateRSOrPushRefOopClosure: public ExtendedOopClosure { |
| G1CollectedHeap* _g1; |
| G1RemSet* _g1_rem_set; |
| HeapRegion* _from; |
| OopsInHeapRegionClosure* _push_ref_cl; |
| bool _record_refs_into_cset; |
| uint _worker_i; |
| |
| public: |
| G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h, |
| G1RemSet* rs, |
| OopsInHeapRegionClosure* push_ref_cl, |
| bool record_refs_into_cset, |
| uint worker_i = 0); |
| |
| void set_from(HeapRegion* from) { |
| assert(from != NULL, "from region must be non-NULL"); |
| _from = from; |
| } |
| |
| bool self_forwarded(oop obj) { |
| bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); |
| return result; |
| } |
| |
| bool apply_to_weak_ref_discovered_field() { return true; } |
| |
| template <class T> void do_oop_nv(T* p); |
| virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
| virtual void do_oop(oop* p) { do_oop_nv(p); } |
| }; |
| |
| #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_HPP |