1 /* 2 * Copyright (c) 2003, 2018, 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.parallel; 26 27 import java.io.*; 28 import java.util.*; 29 30 import sun.jvm.hotspot.debugger.*; 31 import sun.jvm.hotspot.gc.shared.*; 32 import sun.jvm.hotspot.memory.MemRegion; 33 import sun.jvm.hotspot.runtime.*; 34 import sun.jvm.hotspot.types.*; 35 36 public class ParallelScavengeHeap extends CollectedHeap { 37 static { 38 VM.registerVMInitializedObserver(new Observer() { 39 public void update(Observable o, Object data) { 40 initialize(VM.getVM().getTypeDataBase()); 41 } 42 }); 43 } 44 45 private static synchronized void initialize(TypeDataBase db) { 46 Type type = db.lookupType("ParallelScavengeHeap"); 47 youngGenField = type.getAddressField("_young_gen"); 48 oldGenField = type.getAddressField("_old_gen"); 49 } 50 51 public ParallelScavengeHeap(Address addr) { 52 super(addr); 53 } 54 55 // Fields 56 private static AddressField youngGenField; 57 private static AddressField oldGenField; 58 59 // Accessors 60 public PSYoungGen youngGen() { 61 return (PSYoungGen) VMObjectFactory.newObject(PSYoungGen.class, youngGenField.getValue()); 62 } 63 64 public PSOldGen oldGen() { 65 return (PSOldGen) VMObjectFactory.newObject(PSOldGen.class, oldGenField.getValue()); 66 } 67 68 public long capacity() { 69 return youngGen().capacity() + oldGen().capacity(); 70 } 71 72 public long used() { 73 return youngGen().used() + oldGen().used(); 74 } 75 76 public boolean isIn(Address a) { 77 if (youngGen().isIn(a)) { 78 return true; 79 } 80 81 if (oldGen().isIn(a)) { 82 return true; 83 } 84 85 return false; 86 } 87 88 public CollectedHeapName kind() { 89 return CollectedHeapName.PARALLEL; 90 } 91 92 // Simple wrapper to provide toString() usable for debugging. 93 private class LiveRegionProviderImpl implements LiveRegionsProvider { 94 private String name; 95 private MutableSpace space; 96 97 public LiveRegionProviderImpl(String name, MutableSpace space) { 98 this.name = name; 99 this.space = space; 100 } 101 102 @Override 103 public List<MemRegion> getLiveRegions() { 104 return space.getLiveRegions(); 105 } 106 @Override 107 public String toString() { 108 return name; 109 } 110 } 111 112 public void liveRegionsIterate(LiveRegionsClosure closure) { 113 // Add eden space 114 closure.doLiveRegions(new LiveRegionProviderImpl("eden", youngGen().edenSpace())); 115 // Add from-space but not to-space 116 closure.doLiveRegions(new LiveRegionProviderImpl("from", youngGen().fromSpace())); 117 118 closure.doLiveRegions(new LiveRegionProviderImpl("old ", oldGen().objectSpace())); 119 } 120 121 public void printOn(PrintStream tty) { 122 tty.print("ParallelScavengeHeap [ "); 123 youngGen().printOn(tty); 124 oldGen().printOn(tty); 125 tty.print(" ] "); 126 } 127 }