Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/G1CollectedHeap.java @ 20336:6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
Summary: Let HeapRegionSeq manage the heap region and auxiliary data to decrease the amount of responsibilities of G1CollectedHeap, and encapsulate this work from other code.
Reviewed-by: jwilhelm, jmasa, mgerdin, brutisso
| author | tschatzl |
|---|---|
| date | Tue, 19 Aug 2014 10:50:27 +0200 |
| parents | 58fc1b1523dc |
| children | a8ea2f110d87 |
| rev | line source |
|---|---|
| 3972 | 1 /* |
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
| 3972 | 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 package sun.jvm.hotspot.gc_implementation.g1; | |
| 26 | |
| 27 import java.util.Iterator; | |
| 28 import java.util.Observable; | |
| 29 import java.util.Observer; | |
| 30 | |
| 31 import sun.jvm.hotspot.debugger.Address; | |
| 32 import sun.jvm.hotspot.gc_interface.CollectedHeapName; | |
| 33 import sun.jvm.hotspot.memory.MemRegion; | |
| 34 import sun.jvm.hotspot.memory.SharedHeap; | |
| 35 import sun.jvm.hotspot.memory.SpaceClosure; | |
| 36 import sun.jvm.hotspot.runtime.VM; | |
| 37 import sun.jvm.hotspot.runtime.VMObjectFactory; | |
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38 import sun.jvm.hotspot.types.AddressField; |
| 3972 | 39 import sun.jvm.hotspot.types.CIntegerField; |
| 40 import sun.jvm.hotspot.types.Type; | |
| 41 import sun.jvm.hotspot.types.TypeDataBase; | |
| 42 | |
| 43 // Mirror class for G1CollectedHeap. | |
| 44 | |
| 45 public class G1CollectedHeap extends SharedHeap { | |
| 46 // HeapRegionSeq _seq; | |
| 47 static private long hrsFieldOffset; | |
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48 // MemRegion _g1_reserved; |
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49 static private long g1ReservedFieldOffset; |
| 3972 | 50 // size_t _summary_bytes_used; |
| 51 static private CIntegerField summaryBytesUsedField; | |
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52 // G1MonitoringSupport* _g1mm; |
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53 static private AddressField g1mmField; |
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54 // HeapRegionSet _old_set; |
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55 static private long oldSetFieldOffset; |
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56 // HeapRegionSet _humongous_set; |
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57 static private long humongousSetFieldOffset; |
| 3972 | 58 |
| 59 static { | |
| 60 VM.registerVMInitializedObserver(new Observer() { | |
| 61 public void update(Observable o, Object data) { | |
| 62 initialize(VM.getVM().getTypeDataBase()); | |
| 63 } | |
| 64 }); | |
| 65 } | |
| 66 | |
| 67 static private synchronized void initialize(TypeDataBase db) { | |
| 68 Type type = db.lookupType("G1CollectedHeap"); | |
| 69 | |
| 70 hrsFieldOffset = type.getField("_hrs").getOffset(); | |
| 71 summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used"); | |
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72 g1mmField = type.getAddressField("_g1mm"); |
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73 oldSetFieldOffset = type.getField("_old_set").getOffset(); |
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74 humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); |
| 3972 | 75 } |
| 76 | |
| 77 public long capacity() { | |
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78 return hrs().capacity(); |
| 3972 | 79 } |
| 80 | |
| 81 public long used() { | |
| 82 return summaryBytesUsedField.getValue(addr); | |
| 83 } | |
| 84 | |
| 85 public long n_regions() { | |
| 86 return hrs().length(); | |
| 87 } | |
| 88 | |
| 89 private HeapRegionSeq hrs() { | |
| 90 Address hrsAddr = addr.addOffsetTo(hrsFieldOffset); | |
| 91 return (HeapRegionSeq) VMObjectFactory.newObject(HeapRegionSeq.class, | |
| 92 hrsAddr); | |
| 93 } | |
| 94 | |
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95 public G1MonitoringSupport g1mm() { |
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96 Address g1mmAddr = g1mmField.getValue(addr); |
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97 return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); |
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98 } |
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99 |
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100 public HeapRegionSetBase oldSet() { |
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101 Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); |
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102 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, |
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103 oldSetAddr); |
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104 } |
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105 |
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106 public HeapRegionSetBase humongousSet() { |
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107 Address humongousSetAddr = addr.addOffsetTo(humongousSetFieldOffset); |
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108 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, |
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109 humongousSetAddr); |
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110 } |
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111 |
| 3972 | 112 private Iterator<HeapRegion> heapRegionIterator() { |
| 113 return hrs().heapRegionIterator(); | |
| 114 } | |
| 115 | |
| 116 public void heapRegionIterate(SpaceClosure scl) { | |
| 117 Iterator<HeapRegion> iter = heapRegionIterator(); | |
| 118 while (iter.hasNext()) { | |
| 119 HeapRegion hr = iter.next(); | |
| 120 scl.doSpace(hr); | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 public CollectedHeapName kind() { | |
| 125 return CollectedHeapName.G1_COLLECTED_HEAP; | |
| 126 } | |
| 127 | |
| 128 public G1CollectedHeap(Address addr) { | |
| 129 super(addr); | |
| 130 } | |
| 131 } |