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