1 /* 2 * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP 26 #define SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP 27 28 #include "memory/iterator.hpp" 29 #include "memory/universe.hpp" 30 31 class G1CollectedHeap; 32 class G1FullCollector; 33 class G1CMBitMap; 34 class G1FullGCMarker; 35 36 // Below are closures used by the G1 Full GC. 37 class G1IsAliveClosure : public BoolObjectClosure { 38 G1CMBitMap* _bitmap; 39 40 public: 41 G1IsAliveClosure(G1CMBitMap* bitmap) : _bitmap(bitmap) { } 42 43 virtual bool do_object_b(oop p); 44 }; 45 46 class G1FullKeepAliveClosure: public OopClosure { 47 G1FullGCMarker* _marker; 48 template <class T> 49 inline void do_oop_work(T* p); 50 51 public: 52 G1FullKeepAliveClosure(G1FullGCMarker* pm) : _marker(pm) { } 53 54 virtual void do_oop(oop* p); 55 virtual void do_oop(narrowOop* p); 56 }; 57 58 class G1MarkAndPushClosure : public OopIterateClosure { 59 G1FullGCMarker* _marker; 60 uint _worker_id; 61 62 public: 63 G1MarkAndPushClosure(uint worker, G1FullGCMarker* marker, ReferenceDiscoverer* ref) : 64 _marker(marker), 65 _worker_id(worker), 66 OopIterateClosure(ref) { } 67 68 template <class T> inline void do_oop_work(T* p); 69 virtual void do_oop(oop* p); 70 virtual void do_oop(narrowOop* p); 71 72 virtual bool do_metadata(); 73 virtual void do_klass(Klass* k); 74 virtual void do_cld(ClassLoaderData* cld); 75 }; 76 77 class G1AdjustClosure : public BasicOopIterateClosure { 78 template <class T> static inline void adjust_pointer(T* p); 79 public: 80 template <class T> void do_oop_work(T* p) { adjust_pointer(p); } 81 virtual void do_oop(oop* p); 82 virtual void do_oop(narrowOop* p); 83 84 virtual ReferenceIterationMode reference_iteration_mode() { return DO_FIELDS; } 85 }; 86 87 class G1VerifyOopClosure: public OopClosure { 88 private: 89 G1CollectedHeap* _g1h; 90 bool _failures; 91 oop _containing_obj; 92 VerifyOption _verify_option; 93 94 public: 95 int _cc; 96 G1VerifyOopClosure(VerifyOption option); 97 98 void set_containing_obj(oop obj) { 99 _containing_obj = obj; 100 } 101 102 bool failures() { return _failures; } 103 void print_object(outputStream* out, oop obj); 104 105 template <class T> void do_oop_work(T* p); 106 107 void do_oop(oop* p) { do_oop_work(p); } 108 void do_oop(narrowOop* p) { do_oop_work(p); } 109 }; 110 111 class G1FollowStackClosure: public VoidClosure { 112 G1FullGCMarker* _marker; 113 114 public: 115 G1FollowStackClosure(G1FullGCMarker* marker) : _marker(marker) {} 116 virtual void do_void(); 117 }; 118 119 #endif // SHARE_GC_G1_G1FULLGCOOPCLOSURES_HPP