1 /* 2 * Copyright (c) 2001, 2015, 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_G1_VM_OPERATIONS_G1_HPP 26 #define SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP 27 28 #include "gc/g1/g1AllocationContext.hpp" 29 #include "gc/shared/gcId.hpp" 30 #include "gc/shared/vmGCOperations.hpp" 31 32 // VM_operations for the G1 collector. 33 // VM_GC_Operation: 34 // - VM_CGC_Operation 35 // - VM_G1CollectFull 36 // - VM_G1OperationWithAllocRequest 37 // - VM_G1CollectForAllocation 38 // - VM_G1IncCollectionPause 39 40 class VM_G1OperationWithAllocRequest : public VM_CollectForAllocation { 41 protected: 42 bool _pause_succeeded; 43 AllocationContext_t _allocation_context; 44 45 public: 46 VM_G1OperationWithAllocRequest(uint gc_count_before, 47 size_t word_size, 48 GCCause::Cause gc_cause) 49 : VM_CollectForAllocation(word_size, gc_count_before, gc_cause), 50 _pause_succeeded(false) {} 51 bool pause_succeeded() { return _pause_succeeded; } 52 void set_allocation_context(AllocationContext_t context) { _allocation_context = context; } 53 AllocationContext_t allocation_context() { return _allocation_context; } 54 }; 55 56 class VM_G1CollectFull: public VM_GC_Operation { 57 public: 58 VM_G1CollectFull(uint gc_count_before, 59 uint full_gc_count_before, 60 GCCause::Cause cause) 61 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before, true) { } 62 virtual VMOp_Type type() const { return VMOp_G1CollectFull; } 63 virtual void doit(); 64 virtual const char* name() const { 65 return "full garbage-first collection"; 66 } 67 }; 68 69 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest { 70 public: 71 VM_G1CollectForAllocation(uint gc_count_before, 72 size_t word_size); 73 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; } 74 virtual void doit(); 75 virtual const char* name() const { 76 return "garbage-first collection to satisfy allocation"; 77 } 78 }; 79 80 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest { 81 private: 82 bool _should_initiate_conc_mark; 83 bool _should_retry_gc; 84 double _target_pause_time_ms; 85 uint _old_marking_cycles_completed_before; 86 public: 87 VM_G1IncCollectionPause(uint gc_count_before, 88 size_t word_size, 89 bool should_initiate_conc_mark, 90 double target_pause_time_ms, 91 GCCause::Cause gc_cause); 92 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } 93 virtual bool doit_prologue(); 94 virtual void doit(); 95 virtual void doit_epilogue(); 96 virtual const char* name() const { 97 return "garbage-first incremental collection pause"; 98 } 99 bool should_retry_gc() const { return _should_retry_gc; } 100 }; 101 102 // Concurrent GC stop-the-world operations such as remark and cleanup; 103 // consider sharing these with CMS's counterparts. 104 class VM_CGC_Operation: public VM_Operation { 105 VoidClosure* _cl; 106 const char* _printGCMessage; 107 bool _needs_pll; 108 uint _gc_id; 109 110 protected: 111 // java.lang.ref.Reference support 112 void acquire_pending_list_lock(); 113 void release_and_notify_pending_list_lock(); 114 115 public: 116 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll) 117 : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll), _gc_id(GCId::current()) { } 118 virtual VMOp_Type type() const { return VMOp_CGC_Operation; } 119 virtual void doit(); 120 virtual bool doit_prologue(); 121 virtual void doit_epilogue(); 122 virtual const char* name() const { 123 return "concurrent gc"; 124 } 125 }; 126 127 #endif // SHARE_VM_GC_G1_VM_OPERATIONS_G1_HPP