1 /* 2 * Copyright (c) 2007, 2010, 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 // Closures for ParNewGeneration 26 27 class ParScanThreadState; 28 class ParNewGeneration; 29 typedef Padded<OopTaskQueue> ObjToScanQueue; 30 typedef GenericTaskQueueSet<ObjToScanQueue> ObjToScanQueueSet; 31 class ParallelTaskTerminator; 32 33 class ParScanClosure: public OopsInGenClosure { 34 protected: 35 ParScanThreadState* _par_scan_state; 36 ParNewGeneration* _g; 37 HeapWord* _boundary; 38 template <class T> void inline par_do_barrier(T* p); 39 template <class T> void inline do_oop_work(T* p, 40 bool gc_barrier, 41 bool root_scan); 42 public: 43 ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state); 44 }; 45 46 class ParScanWithBarrierClosure: public ParScanClosure { 47 public: 48 ParScanWithBarrierClosure(ParNewGeneration* g, 49 ParScanThreadState* par_scan_state) : 50 ParScanClosure(g, par_scan_state) {} 51 virtual void do_oop(oop* p); 52 virtual void do_oop(narrowOop* p); 53 inline void do_oop_nv(oop* p); 54 inline void do_oop_nv(narrowOop* p); 55 }; 56 57 class ParScanWithoutBarrierClosure: public ParScanClosure { 58 public: 59 ParScanWithoutBarrierClosure(ParNewGeneration* g, 60 ParScanThreadState* par_scan_state) : 61 ParScanClosure(g, par_scan_state) {} 62 virtual void do_oop(oop* p); 63 virtual void do_oop(narrowOop* p); 64 inline void do_oop_nv(oop* p); 65 inline void do_oop_nv(narrowOop* p); 66 }; 67 68 class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure { 69 public: 70 ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g, 71 ParScanThreadState* par_scan_state) : 72 ParScanClosure(g, par_scan_state) {} 73 virtual void do_oop(oop* p); 74 virtual void do_oop(narrowOop* p); 75 }; 76 77 class ParRootScanWithoutBarrierClosure: public ParScanClosure { 78 public: 79 ParRootScanWithoutBarrierClosure(ParNewGeneration* g, 80 ParScanThreadState* par_scan_state) : 81 ParScanClosure(g, par_scan_state) {} 82 virtual void do_oop(oop* p); 83 virtual void do_oop(narrowOop* p); 84 }; 85 86 class ParScanWeakRefClosure: public ScanWeakRefClosure { 87 protected: 88 ParScanThreadState* _par_scan_state; 89 template <class T> inline void do_oop_work(T* p); 90 public: 91 ParScanWeakRefClosure(ParNewGeneration* g, 92 ParScanThreadState* par_scan_state); 93 virtual void do_oop(oop* p); 94 virtual void do_oop(narrowOop* p); 95 inline void do_oop_nv(oop* p); 96 inline void do_oop_nv(narrowOop* p); 97 }; 98 99 class ParEvacuateFollowersClosure: public VoidClosure { 100 private: 101 ParScanThreadState* _par_scan_state; 102 ParScanThreadState* par_scan_state() { return _par_scan_state; } 103 104 // We want to preserve the specific types here (rather than "OopClosure") 105 // for later de-virtualization of do_oop calls. 106 ParScanWithoutBarrierClosure* _to_space_closure; 107 ParScanWithoutBarrierClosure* to_space_closure() { 108 return _to_space_closure; 109 } 110 ParRootScanWithoutBarrierClosure* _to_space_root_closure; 111 ParRootScanWithoutBarrierClosure* to_space_root_closure() { 112 return _to_space_root_closure; 113 } 114 115 ParScanWithBarrierClosure* _old_gen_closure; 116 ParScanWithBarrierClosure* old_gen_closure () { 117 return _old_gen_closure; 118 } 119 ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure; 120 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () { 121 return _old_gen_root_closure; 122 } 123 124 ParNewGeneration* _par_gen; 125 ParNewGeneration* par_gen() { return _par_gen; } 126 127 ObjToScanQueueSet* _task_queues; 128 ObjToScanQueueSet* task_queues() { return _task_queues; } 129 130 ParallelTaskTerminator* _terminator; 131 ParallelTaskTerminator* terminator() { return _terminator; } 132 public: 133 ParEvacuateFollowersClosure( 134 ParScanThreadState* par_scan_state_, 135 ParScanWithoutBarrierClosure* to_space_closure_, 136 ParScanWithBarrierClosure* old_gen_closure_, 137 ParRootScanWithoutBarrierClosure* to_space_root_closure_, 138 ParNewGeneration* par_gen_, 139 ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_, 140 ObjToScanQueueSet* task_queues_, 141 ParallelTaskTerminator* terminator_); 142 virtual void do_void(); 143 };