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 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.*; 33 import sun.jvm.hotspot.runtime.*; 34 import sun.jvm.hotspot.types.*; 35 36 public class PSYoungGen extends VMObject { 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("PSYoungGen"); 47 edenSpaceField = type.getAddressField("_eden_space"); 48 fromSpaceField = type.getAddressField("_from_space"); 49 toSpaceField = type.getAddressField("_to_space"); 50 } 51 52 public PSYoungGen(Address addr) { 53 super(addr); 54 } 55 56 // Fields 57 private static AddressField edenSpaceField; 58 private static AddressField fromSpaceField; 59 private static AddressField toSpaceField; 60 61 // Accessors 62 public MutableSpace edenSpace() { 63 return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, edenSpaceField.getValue(addr)); 64 } 65 66 public MutableSpace fromSpace() { 67 return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, fromSpaceField.getValue(addr)); 68 } 69 70 public MutableSpace toSpace() { 71 return (MutableSpace) VMObjectFactory.newObject(MutableSpace.class, toSpaceField.getValue(addr)); 72 } 73 74 public long capacity() { 75 return edenSpace().capacity() + fromSpace().capacity(); 76 } 77 78 public long used() { 79 return edenSpace().used() + fromSpace().used(); 80 } 81 82 public boolean isIn(Address a) { 83 if (edenSpace().contains(a)) { 84 return true; 85 } 86 87 if (fromSpace().contains(a)) { 88 return true; 89 } 90 return false; 91 } 92 93 public void printOn(PrintStream tty) { 94 tty.print("PSYoungGen [ "); 95 tty.print("eden = "); 96 edenSpace().printOn(tty); 97 tty.print(", from = "); 98 fromSpace().printOn(tty); 99 tty.print(", to = "); 100 toSpace().printOn(tty); 101 tty.print(" ] "); 102 } 103 }