1 /* 2 * Copyright (c) 2011, 2019, 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.g1; 26 27 import java.io.PrintStream; 28 import java.util.Iterator; 29 import java.util.Observable; 30 import java.util.Observer; 31 32 import sun.jvm.hotspot.debugger.Address; 33 import sun.jvm.hotspot.gc.shared.CollectedHeap; 34 import sun.jvm.hotspot.gc.shared.CollectedHeapName; 35 import sun.jvm.hotspot.gc.shared.LiveRegionsClosure; 36 import sun.jvm.hotspot.gc.shared.PrintRegionClosure; 37 import sun.jvm.hotspot.gc.shared.SpaceClosure; 38 import sun.jvm.hotspot.memory.MemRegion; 39 import sun.jvm.hotspot.runtime.VM; 40 import sun.jvm.hotspot.runtime.VMObjectFactory; 41 import sun.jvm.hotspot.types.AddressField; 42 import sun.jvm.hotspot.types.CIntegerField; 43 import sun.jvm.hotspot.types.Type; 44 import sun.jvm.hotspot.types.TypeDataBase; 45 import sun.jvm.hotspot.tools.HeapSummary; 46 47 // Mirror class for G1CollectedHeap. 48 49 public class G1CollectedHeap extends CollectedHeap { 50 // HeapRegionManager _hrm; 51 static private AddressField hrmField; 52 // MemRegion _g1_reserved; 53 static private long g1ReservedFieldOffset; 54 // size_t _summary_bytes_used; 55 static private CIntegerField summaryBytesUsedField; 56 // G1MonitoringSupport* _g1mm; 57 static private AddressField g1mmField; 58 // HeapRegionSet _old_set; 59 static private long oldSetFieldOffset; 60 // HeapRegionSet _archive_set; 61 static private long archiveSetFieldOffset; 62 // HeapRegionSet _humongous_set; 63 static private long humongousSetFieldOffset; 64 65 static { 66 VM.registerVMInitializedObserver(new Observer() { 67 public void update(Observable o, Object data) { 68 initialize(VM.getVM().getTypeDataBase()); 69 } 70 }); 71 } 72 73 static private synchronized void initialize(TypeDataBase db) { 74 Type type = db.lookupType("G1CollectedHeap"); 75 76 hrmField = type.getAddressField("_hrm"); 77 summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used"); 78 g1mmField = type.getAddressField("_g1mm"); 79 oldSetFieldOffset = type.getField("_old_set").getOffset(); 80 archiveSetFieldOffset = type.getField("_archive_set").getOffset(); 81 humongousSetFieldOffset = type.getField("_humongous_set").getOffset(); 82 } 83 84 public long capacity() { 85 return hrm().capacity(); 86 } 87 88 public long used() { 89 return summaryBytesUsedField.getValue(addr); 90 } 91 92 public long n_regions() { 93 return hrm().length(); 94 } 95 96 public HeapRegionManager hrm() { 97 Address hrmAddr = hrmField.getValue(addr); 98 return (HeapRegionManager) VMObjectFactory.newObject(HeapRegionManager.class, 99 hrmAddr); 100 } 101 102 public G1MonitoringSupport g1mm() { 103 Address g1mmAddr = g1mmField.getValue(addr); 104 return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr); 105 } 106 107 public HeapRegionSetBase oldSet() { 108 Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset); 109 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 110 oldSetAddr); 111 } 112 113 public HeapRegionSetBase archiveSet() { 114 Address archiveSetAddr = addr.addOffsetTo(archiveSetFieldOffset); 115 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 116 archiveSetAddr); 117 } 118 119 public HeapRegionSetBase humongousSet() { 120 Address humongousSetAddr = addr.addOffsetTo(humongousSetFieldOffset); 121 return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class, 122 humongousSetAddr); 123 } 124 125 private Iterator<HeapRegion> heapRegionIterator() { 126 return hrm().heapRegionIterator(); 127 } 128 129 public void heapRegionIterate(SpaceClosure scl) { 130 Iterator<HeapRegion> iter = heapRegionIterator(); 131 while (iter.hasNext()) { 132 HeapRegion hr = iter.next(); 133 scl.doSpace(hr); 134 } 135 } 136 137 public CollectedHeapName kind() { 138 return CollectedHeapName.G1; 139 } 140 141 @Override 142 public void liveRegionsIterate(LiveRegionsClosure closure) { 143 Iterator<HeapRegion> iter = heapRegionIterator(); 144 while (iter.hasNext()) { 145 HeapRegion hr = iter.next(); 146 closure.doLiveRegions(hr); 147 } 148 } 149 150 @Override 151 public void printOn(PrintStream tty) { 152 MemRegion mr = reservedRegion(); 153 154 tty.print("garbage-first heap"); 155 tty.print(" [" + mr.start() + ", " + mr.end() + "]"); 156 tty.println(" region size " + (HeapRegion.grainBytes() / 1024) + "K"); 157 158 HeapSummary sum = new HeapSummary(); 159 sum.printG1HeapSummary(this); 160 } 161 162 public void printRegionDetails(PrintStream tty) { 163 PrintRegionClosure prc = new PrintRegionClosure(tty); 164 heapRegionIterate(prc); 165 } 166 167 public G1CollectedHeap(Address addr) { 168 super(addr); 169 } 170 }