Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1OopClosures.hpp @ 11646:8f8f6afeb97a
New caching mechanism in TruffleCache for better compilation performance. Clean up of partial evaluator phases.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 15 Sep 2013 16:27:07 +0200 |
parents | da91efe96a93 |
children | 190899198332 |
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/* * Copyright (c) 2001, 2012, 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 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 OopsInGenClosure { protected: HeapRegion* _from; public: void set_region(HeapRegion* from) { _from = from; } }; class G1ParClosureSuper : public OopsInHeapRegionClosure { protected: G1CollectedHeap* _g1; G1RemSet* _g1_rem; ConcurrentMark* _cm; G1ParScanThreadState* _par_scan_state; uint _worker_id; bool _during_initial_mark; bool _mark_in_progress; public: G1ParClosureSuper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state); bool apply_to_weak_ref_discovered_field() { return true; } }; 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, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) : G1ParClosureSuper(g1, par_scan_state) { 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); } }; #define G1_PARTIAL_ARRAY_MASK 0x2 template <class T> inline bool has_partial_array_mask(T* ref) { return ((uintptr_t)ref & G1_PARTIAL_ARRAY_MASK) == G1_PARTIAL_ARRAY_MASK; } template <class T> inline T* set_partial_array_mask(T obj) { assert(((uintptr_t)obj & G1_PARTIAL_ARRAY_MASK) == 0, "Information loss!"); return (T*) ((uintptr_t)obj | G1_PARTIAL_ARRAY_MASK); } template <class T> inline oop clear_partial_array_mask(T* ref) { return oop((intptr_t)ref & ~G1_PARTIAL_ARRAY_MASK); } class G1ParScanPartialArrayClosure : public G1ParClosureSuper { G1ParScanClosure _scanner; public: G1ParScanPartialArrayClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) : G1ParClosureSuper(g1, par_scan_state), _scanner(g1, par_scan_state, rp) { assert(_ref_processor == NULL, "sanity"); } G1ParScanClosure* scanner() { return &_scanner; } 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 { Klass* _scanned_klass; public: G1ParCopyHelper(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) : _scanned_klass(NULL), G1ParClosureSuper(g1, 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 <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> class G1ParCopyClosure : public G1ParCopyHelper { G1ParScanClosure _scanner; template <class T> void do_oop_work(T* p); protected: // 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); oop copy_to_survivor_space(oop obj); public: G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state, ReferenceProcessor* rp) : _scanner(g1, par_scan_state, rp), G1ParCopyHelper(g1, par_scan_state) { assert(_ref_processor == NULL, "sanity"); } G1ParScanClosure* scanner() { return &_scanner; } 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); } }; typedef G1ParCopyClosure<false, G1BarrierNone, false> G1ParScanExtRootClosure; typedef G1ParCopyClosure<false, G1BarrierKlass, false> G1ParScanMetadataClosure; typedef G1ParCopyClosure<false, G1BarrierNone, true> G1ParScanAndMarkExtRootClosure; typedef G1ParCopyClosure<true, G1BarrierNone, true> G1ParScanAndMarkClosure; typedef G1ParCopyClosure<false, G1BarrierKlass, true> G1ParScanAndMarkMetadataClosure; // The following closure types are no longer used but are retained // for historical reasons: // typedef G1ParCopyClosure<false, G1BarrierRS, false> G1ParScanHeapRSClosure; // typedef G1ParCopyClosure<false, G1BarrierRS, true> G1ParScanAndMarkHeapRSClosure; // The following closure type is defined in g1_specialized_oop_closures.hpp: // // typedef G1ParCopyClosure<false, G1BarrierEvac, false> G1ParScanHeapEvacClosure; // We use a separate closure to handle references during evacuation // failure processing. // We could have used another instance of G1ParScanHeapEvacClosure // (since that closure no longer assumes that the references it // handles point into the collection set). typedef G1ParCopyClosure<false, G1BarrierEvac, false> 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 ExtendedOopClosure { private: G1CollectedHeap* _g1h; ConcurrentMark* _cm; 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 ExtendedOopClosure { 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; int _worker_i; public: G1UpdateRSOrPushRefOopClosure(G1CollectedHeap* g1h, G1RemSet* rs, OopsInHeapRegionClosure* push_ref_cl, bool record_refs_into_cset, int 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