1 /* 2 * Copyright (c) 2001, 2011, 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_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP 27 28 #include "gc_implementation/shared/vmGCOperations.hpp" 29 30 // VM_operations for the G1 collector. 31 // VM_GC_Operation: 32 // - VM_CGC_Operation 33 // - VM_G1CollectFull 34 // - VM_G1OperationWithAllocRequest 35 // - VM_G1CollectForAllocation 36 // - VM_G1IncCollectionPause 37 38 class VM_G1OperationWithAllocRequest: public VM_GC_Operation { 39 protected: 40 size_t _word_size; 41 HeapWord* _result; 42 bool _pause_succeeded; 43 44 public: 45 VM_G1OperationWithAllocRequest(unsigned int gc_count_before, 46 size_t word_size) 47 : VM_GC_Operation(gc_count_before, GCCause::_allocation_failure), 48 _word_size(word_size), _result(NULL), _pause_succeeded(false) { } 49 HeapWord* result() { return _result; } 50 bool pause_succeeded() { return _pause_succeeded; } 51 }; 52 53 class VM_G1CollectFull: public VM_GC_Operation { 54 public: 55 VM_G1CollectFull(unsigned int gc_count_before, 56 unsigned int full_gc_count_before, 57 GCCause::Cause cause) 58 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { } 59 virtual VMOp_Type type() const { return VMOp_G1CollectFull; } 60 virtual void doit(); 61 virtual const char* name() const { 62 return "full garbage-first collection"; 63 } 64 }; 65 66 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest { 67 public: 68 VM_G1CollectForAllocation(unsigned int gc_count_before, 69 size_t word_size); 70 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; } 71 virtual void doit(); 72 virtual const char* name() const { 73 return "garbage-first collection to satisfy allocation"; 74 } 75 }; 76 77 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest { 78 private: 79 bool _should_initiate_conc_mark; 80 double _target_pause_time_ms; 81 unsigned int _full_collections_completed_before; 82 public: 83 VM_G1IncCollectionPause(unsigned int gc_count_before, 84 size_t word_size, 85 bool should_initiate_conc_mark, 86 double target_pause_time_ms, 87 GCCause::Cause gc_cause); 88 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } 89 virtual void doit(); 90 virtual void doit_epilogue(); 91 virtual const char* name() const { 92 return "garbage-first incremental collection pause"; 93 } 94 }; 95 96 // Concurrent GC stop-the-world operations such as initial and final mark; 97 // consider sharing these with CMS's counterparts. 98 class VM_CGC_Operation: public VM_Operation { 99 VoidClosure* _cl; 100 const char* _printGCMessage; 101 public: 102 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) 103 : _cl(cl), _printGCMessage(printGCMsg) { } 104 virtual VMOp_Type type() const { return VMOp_CGC_Operation; } 105 virtual void doit(); 106 virtual bool doit_prologue(); 107 virtual void doit_epilogue(); 108 virtual const char* name() const { 109 return "concurrent gc"; 110 } 111 }; 112 113 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP