Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/concurrentMarkSweep/vmCMSOperations.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | bb843ebc7c55 |
| children | f95d63e2154a |
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| 0 | 1 /* |
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2 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // The VM_CMS_Operation is slightly different from | |
| 26 // a VM_GC_Operation -- and would not have subclassed easily | |
| 27 // to VM_GC_Operation without several changes to VM_GC_Operation. | |
| 28 // To minimize the changes, we have replicated some of the VM_GC_Operation | |
| 29 // functionality here. We will consolidate that back by doing subclassing | |
| 30 // as appropriate in Dolphin. | |
| 31 // | |
| 32 // VM_Operation | |
| 33 // VM_CMS_Operation | |
| 34 // - implements the common portion of work done in support | |
| 35 // of CMS' stop-world phases (initial mark and remark). | |
| 36 // | |
| 37 // VM_CMS_Initial_Mark | |
| 38 // VM_CMS_Final_Mark | |
| 39 // | |
| 40 | |
| 41 // Forward decl. | |
| 42 class CMSCollector; | |
| 43 | |
| 44 class VM_CMS_Operation: public VM_Operation { | |
| 45 protected: | |
| 46 CMSCollector* _collector; // associated collector | |
| 47 bool _prologue_succeeded; // whether doit_prologue succeeded | |
| 48 | |
| 49 bool lost_race() const; | |
| 50 | |
| 51 // java.lang.ref.Reference support | |
| 52 void acquire_pending_list_lock(); | |
| 53 void release_and_notify_pending_list_lock(); | |
| 54 | |
| 55 public: | |
| 56 VM_CMS_Operation(CMSCollector* collector): | |
| 57 _collector(collector), | |
| 58 _prologue_succeeded(false) {} | |
| 59 ~VM_CMS_Operation() {} | |
| 60 | |
| 61 // The legal collector state for executing this CMS op. | |
| 62 virtual const CMSCollector::CollectorState legal_state() const = 0; | |
| 63 | |
| 64 // Whether the pending list lock needs to be held | |
| 65 virtual const bool needs_pll() const = 0; | |
| 66 | |
| 67 // Execute operations in the context of the caller, | |
| 68 // prior to execution of the vm operation itself. | |
| 69 virtual bool doit_prologue(); | |
| 70 // Execute operations in the context of the caller, | |
| 71 // following completion of the vm operation. | |
| 72 virtual void doit_epilogue(); | |
| 73 | |
| 74 virtual bool evaluate_at_safepoint() const { return true; } | |
| 75 virtual bool is_cheap_allocated() const { return false; } | |
| 76 virtual bool allow_nested_vm_operations() const { return false; } | |
| 77 bool prologue_succeeded() const { return _prologue_succeeded; } | |
| 78 | |
| 79 void verify_before_gc(); | |
| 80 void verify_after_gc(); | |
| 81 }; | |
| 82 | |
| 83 | |
| 84 // VM_CMS_Operation for the initial marking phase of CMS. | |
| 85 class VM_CMS_Initial_Mark: public VM_CMS_Operation { | |
| 86 public: | |
| 87 VM_CMS_Initial_Mark(CMSCollector* _collector) : | |
| 88 VM_CMS_Operation(_collector) {} | |
| 89 | |
| 90 virtual VMOp_Type type() const { return VMOp_CMS_Initial_Mark; } | |
| 91 virtual void doit(); | |
| 92 | |
| 93 virtual const CMSCollector::CollectorState legal_state() const { | |
| 94 return CMSCollector::InitialMarking; | |
| 95 } | |
| 96 | |
| 97 virtual const bool needs_pll() const { | |
| 98 return false; | |
| 99 } | |
| 100 }; | |
| 101 | |
| 102 // VM_CMS_Operation for the final remark phase of CMS. | |
| 103 class VM_CMS_Final_Remark: public VM_CMS_Operation { | |
| 104 public: | |
| 105 VM_CMS_Final_Remark(CMSCollector* _collector) : | |
| 106 VM_CMS_Operation(_collector) {} | |
| 107 virtual VMOp_Type type() const { return VMOp_CMS_Final_Remark; } | |
| 108 virtual void doit(); | |
| 109 | |
| 110 virtual const CMSCollector::CollectorState legal_state() const { | |
| 111 return CMSCollector::FinalMarking; | |
| 112 } | |
| 113 | |
| 114 virtual const bool needs_pll() const { | |
| 115 return true; | |
| 116 } | |
| 117 }; | |
| 118 | |
| 119 | |
| 120 // VM operation to invoke a concurrent collection of the heap as a | |
| 121 // GenCollectedHeap heap. | |
| 122 class VM_GenCollectFullConcurrent: public VM_GC_Operation { | |
| 123 public: | |
| 124 VM_GenCollectFullConcurrent(unsigned int gc_count_before, | |
| 125 unsigned int full_gc_count_before, | |
| 126 GCCause::Cause gc_cause) | |
| 127 : VM_GC_Operation(gc_count_before, full_gc_count_before, true /* full */) { | |
| 128 _gc_cause = gc_cause; | |
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129 assert(FullGCCount_lock != NULL, "Error"); |
| 0 | 130 assert(UseAsyncConcMarkSweepGC, "Else will hang caller"); |
| 131 } | |
| 132 ~VM_GenCollectFullConcurrent() {} | |
| 133 virtual VMOp_Type type() const { return VMOp_GenCollectFullConcurrent; } | |
| 134 virtual void doit(); | |
| 135 virtual void doit_epilogue(); | |
| 136 virtual bool is_cheap_allocated() const { return false; } | |
| 137 virtual bool evaluate_at_safepoint() const; | |
| 138 }; |