1 /* 2 * Copyright (c) 2001, 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 #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_G1CollectForAllocation 35 // - VM_G1IncCollectionPause 36 // - VM_G1PopRegionCollectionPause 37 38 class VM_G1CollectFull: public VM_GC_Operation { 39 public: 40 VM_G1CollectFull(unsigned int gc_count_before, 41 unsigned int full_gc_count_before, 42 GCCause::Cause cause) 43 : VM_GC_Operation(gc_count_before, full_gc_count_before) { 44 _gc_cause = cause; 45 } 46 ~VM_G1CollectFull() {} 47 virtual VMOp_Type type() const { return VMOp_G1CollectFull; } 48 virtual void doit(); 49 virtual const char* name() const { 50 return "full garbage-first collection"; 51 } 52 }; 53 54 class VM_G1CollectForAllocation: public VM_GC_Operation { 55 private: 56 HeapWord* _res; 57 size_t _size; // size of object to be allocated 58 public: 59 VM_G1CollectForAllocation(size_t size, int gc_count_before) 60 : VM_GC_Operation(gc_count_before) { 61 _size = size; 62 _res = NULL; 63 } 64 ~VM_G1CollectForAllocation() {} 65 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; } 66 virtual void doit(); 67 virtual const char* name() const { 68 return "garbage-first collection to satisfy allocation"; 69 } 70 HeapWord* result() { return _res; } 71 }; 72 73 class VM_G1IncCollectionPause: public VM_GC_Operation { 74 private: 75 bool _should_initiate_conc_mark; 76 double _target_pause_time_ms; 77 unsigned int _full_collections_completed_before; 78 public: 79 VM_G1IncCollectionPause(unsigned int gc_count_before, 80 bool should_initiate_conc_mark, 81 double target_pause_time_ms, 82 GCCause::Cause cause) 83 : VM_GC_Operation(gc_count_before), 84 _full_collections_completed_before(0), 85 _should_initiate_conc_mark(should_initiate_conc_mark), 86 _target_pause_time_ms(target_pause_time_ms) { 87 guarantee(target_pause_time_ms > 0.0, 88 err_msg("target_pause_time_ms = %1.6lf should be positive", 89 target_pause_time_ms)); 90 91 _gc_cause = cause; 92 } 93 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } 94 virtual void doit(); 95 virtual void doit_epilogue(); 96 virtual const char* name() const { 97 return "garbage-first incremental collection pause"; 98 } 99 }; 100 101 // Concurrent GC stop-the-world operations such as initial and final mark; 102 // consider sharing these with CMS's counterparts. 103 class VM_CGC_Operation: public VM_Operation { 104 VoidClosure* _cl; 105 const char* _printGCMessage; 106 public: 107 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) : 108 _cl(cl), 109 _printGCMessage(printGCMsg) 110 {} 111 112 ~VM_CGC_Operation() {} 113 114 virtual VMOp_Type type() const { return VMOp_CGC_Operation; } 115 virtual void doit(); 116 virtual bool doit_prologue(); 117 virtual void doit_epilogue(); 118 virtual const char* name() const { 119 return "concurrent gc"; 120 } 121 }; 122 123 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP