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.CollectedHeap; 33 import sun.jvm.hotspot.gc_interface.CollectedHeapName; 34 import sun.jvm.hotspot.memory.MemRegion; 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.Type; 40 import sun.jvm.hotspot.types.TypeDataBase; 41 42 // Mirror class for G1CollectedHeap. 43 44 public class G1CollectedHeap extends CollectedHeap { 45 // HeapRegionManager _hrm; 46 static private long hrmFieldOffset; 47 // MemRegion _g1_reserved; 48 static private long g1ReservedFieldOffset; 49 // G1Allocator* _allocator 50 static private AddressField g1Allocator; 51 // G1MonitoringSupport* _g1mm; 52 static private AddressField g1mmField; 53 // HeapRegionSet _old_set; 54 static private long oldSetFieldOffset; 55 // HeapRegionSet _humongous_set; 56 static private long humongousSetFieldOffset; 57 58 static { 59 VM.registerVMInitializedObserver(new Observer() { 60 public void update(Observable o, Object data) { 61 initialize(VM.getVM().getTypeDataBase()); 62 } 63 }); 64 } 65 66 static private synchronized void initialize(TypeDataBase db) { 67 Type type = db.lookupType("G1CollectedHeap"); 68 69 hrmFieldOffset = type.getField("_hrm").getOffset(); 70 g1Allocator = type.getAddressField("_allocator"); 71 g1mmField = type.getAddressField("_g1mm"); 72 oldSetFieldOffset = type.getField("_old_set").getOffset(); 73 humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); 74 } 75 76 public long capacity() { 77 return hrm().capacity(); 78 } 79 80 public long used() { 81 return allocator().getSummaryBytes(); 82 } 83 84 public long n_regions() { 85 return hrm().length(); 86 } 87 88 private HeapRegionManager hrm() { 89 Address hrmAddr = addr.addOffsetTo(hrmFieldOffset); 90 return (HeapRegionManager) VMObjectFactory.newObject(HeapRegionManager.class, 91 hrmAddr); 92 } 93 94 public G1MonitoringSupport g1mm() { 95 Address g1mmAddr = g1mmField.getValue(addr); 96 return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); 97 } 98 99 public G1Allocator allocator() { 100 Address g1AllocatorAddr = g1Allocator.getValue(addr); 101 return (G1Allocator) VMObjectFactory.newObject(G1Allocator.class, g1AllocatorAddr); 102 } 103 104 public HeapRegionSetBase oldSet() { 105 Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); 106 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 107 oldSetAddr); 108 } 109 110 public HeapRegionSetBase humongousSet() { 111 Address humongousSetAddr = addr.addOffsetTo(humongousSetFieldOffset); 112 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 113 humongousSetAddr); 114 } 115 116 private Iterator<HeapRegion> heapRegionIterator() { 117 return hrm().heapRegionIterator(); 118 } 119 120 public void heapRegionIterate(SpaceClosure scl) { 121 Iterator<HeapRegion> iter = heapRegionIterator(); 122 while (iter.hasNext()) { 123 HeapRegion hr = iter.next(); 124 scl.doSpace(hr); 125 } 126 } 127 128 public CollectedHeapName kind() { 129 return CollectedHeapName.G1_COLLECTED_HEAP; 130 } 131 132 public G1CollectedHeap(Address addr) { 133 super(addr); 134 } 135 }