1/* 2 * Copyright (c) 2003, 2015, 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 25package sun.jvm.hotspot.gc.parallel; 26 27import java.io.*; 28import java.util.*; 29 30import sun.jvm.hotspot.debugger.*; 31import sun.jvm.hotspot.memory.*; 32import sun.jvm.hotspot.runtime.*; 33import sun.jvm.hotspot.types.*; 34 35public class PSYoungGen extends VMObject { 36 static { 37 VM.registerVMInitializedObserver(new Observer() { 38 public void update(Observable o, Object data) { 39 initialize(VM.getVM().getTypeDataBase()); 40 } 41 }); 42 } 43 44 private static synchronized void initialize(TypeDataBase db) { 45 Type type = db.lookupType("PSYoungGen"); 46 edenSpaceField = type.getAddressField("_eden_space"); 47 fromSpaceField = type.getAddressField("_from_space"); 48 toSpaceField = type.getAddressField("_to_space"); 49 } 50 51 public PSYoungGen(Address addr) { 52 super(addr); 53 } 54 55 // Fields 56 private static AddressField edenSpaceField; 57 private static AddressField fromSpaceField; 58 private static AddressField toSpaceField; 59 60 // Accessors 61 public MutableSpace edenSpace() { 62 return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, edenSpaceField.getValue(addr)); 63 } 64 65 public MutableSpace fromSpace() { 66 return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, fromSpaceField.getValue(addr)); 67 } 68 69 public MutableSpace toSpace() { 70 return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, toSpaceField.getValue(addr)); 71 } 72 73 public long capacity() { 74 return edenSpace().capacity() + fromSpace().capacity(); 75 } 76 77 public long used() { 78 return edenSpace().used() + fromSpace().used(); 79 } 80 81 public boolean isIn(Address a) { 82 if (edenSpace().contains(a)) { 83 return true; 84 } 85 86 if (fromSpace().contains(a)) { 87 return true; 88 } 89 return false; 90 } 91 92 public void printOn(PrintStream tty) { 93 tty.print("PSYoungGen [ "); 94 tty.print("eden = "); 95 edenSpace().printOn(tty); 96 tty.print(", from = "); 97 fromSpace().printOn(tty); 98 tty.print(", to = "); 99 toSpace().printOn(tty); 100 tty.print(" ] "); 101 } 102} 103