1 /* 2 * Copyright (c) 2000, 2004, 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.oops; 26 27 import java.io.*; 28 import java.util.*; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.runtime.*; 31 import sun.jvm.hotspot.types.*; 32 import sun.jvm.hotspot.utilities.*; 33 34 // A MethodData provides interpreter profiling information 35 36 public class MethodData extends Oop { 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) throws WrongTypeException { 46 Type type = db.lookupType("methodDataOopDesc"); 47 baseOffset = type.getSize(); 48 49 size = new CIntField(type.getCIntegerField("_size"), 0); 50 method = new OopField(type.getOopField("_method"), 0); 51 // FIXME: add more fields and accessors 52 } 53 54 MethodData(OopHandle handle, ObjectHeap heap) { 55 super(handle, heap); 56 } 57 58 public boolean isMethodData() { return true; } 59 60 private static long baseOffset; 61 private static CIntField size; 62 private static OopField method; 63 64 public long getObjectSize() { 65 return alignObjectSize(size.getValue(this)); 66 } 67 68 public Method getMethod() { 69 return (Method) method.getValue(this); 70 } 71 72 public void printValueOn(PrintStream tty) { 73 Method m = getMethod(); 74 tty.print("MethodData for " + m.getName().asString() + m.getSignature().asString()); 75 } 76 77 public void iterateFields(OopVisitor visitor, boolean doVMFields) { 78 super.iterateFields(visitor, doVMFields); 79 if (doVMFields) { 80 visitor.doOop(method, true); 81 visitor.doCInt(size, true); 82 } 83 } 84 }