1 /* 2 * Copyright (c) 2011, 2012, 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 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; 38 import sun.jvm.hotspot.types.AddressField; 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; 48 // MemRegion _g1_committed; 49 static private long g1CommittedFieldOffset; 50 // size_t _summary_bytes_used; 51 static private CIntegerField summaryBytesUsedField; 52 // G1MonitoringSupport* _g1mm; 53 static private AddressField g1mmField; 54 // HeapRegionSet _old_set; 55 static private long oldSetFieldOffset; 56 // HeapRegionSet _humongous_set; 57 static private long humongousSetFieldOffset; 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 g1CommittedFieldOffset = type.getField("_g1_committed").getOffset(); 72 summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used"); 73 g1mmField = type.getAddressField("_g1mm"); 74 oldSetFieldOffset = type.getField("_old_set").getOffset(); 75 humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); 76 } 77 78 public long capacity() { 79 Address g1CommittedAddr = addr.addOffsetTo(g1CommittedFieldOffset); 80 MemRegion g1Committed = new MemRegion(g1CommittedAddr); 81 return g1Committed.byteSize(); 82 } 83 84 public long used() { 85 return summaryBytesUsedField.getValue(addr); 86 } 87 88 public long n_regions() { 89 return hrs().length(); 90 } 91 92 private HeapRegionSeq hrs() { 93 Address hrsAddr = addr.addOffsetTo(hrsFieldOffset); 94 return (HeapRegionSeq) VMObjectFactory.newObject(HeapRegionSeq.class, 95 hrsAddr); 96 } 97 98 public G1MonitoringSupport g1mm() { 99 Address g1mmAddr = g1mmField.getValue(addr); 100 return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); 101 } 102 103 public HeapRegionSetBase oldSet() { 104 Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); 105 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 106 oldSetAddr); 107 } 108 109 public HeapRegionSetBase humongousSet() { 110 Address humongousSetAddr = addr.addOffsetTo(humongousSetFieldOffset); 111 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 112 humongousSetAddr); 113 } 114 115 private Iterator<HeapRegion> heapRegionIterator() { 116 return hrs().heapRegionIterator(); 117 } 118 119 public void heapRegionIterate(SpaceClosure scl) { 120 Iterator<HeapRegion> iter = heapRegionIterator(); 121 while (iter.hasNext()) { 122 HeapRegion hr = iter.next(); 123 scl.doSpace(hr); 124 } 125 } 126 127 public CollectedHeapName kind() { 128 return CollectedHeapName.G1_COLLECTED_HEAP; 129 } 130 131 public G1CollectedHeap(Address addr) { 132 super(addr); 133 } 134 }