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1 /*
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2 * Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.oops;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 // A MethodData provides interpreter profiling information
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35
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36 public class MethodData extends Oop {
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37 static {
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38 VM.registerVMInitializedObserver(new Observer() {
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39 public void update(Observable o, Object data) {
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40 initialize(VM.getVM().getTypeDataBase());
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41 }
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42 });
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43 }
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44
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45 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
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46 Type type = db.lookupType("methodDataOopDesc");
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47 baseOffset = type.getSize();
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48
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49 size = new CIntField(type.getCIntegerField("_size"), 0);
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50 method = new OopField(type.getOopField("_method"), 0);
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51 // FIXME: add more fields and accessors
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52 }
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53
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54 MethodData(OopHandle handle, ObjectHeap heap) {
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55 super(handle, heap);
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56 }
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57
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58 public boolean isMethodData() { return true; }
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59
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60 private static long baseOffset;
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61 private static CIntField size;
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62 private static OopField method;
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63
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64 public long getObjectSize() {
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65 return alignObjectSize(size.getValue(this));
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66 }
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67
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68 public Method getMethod() {
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69 return (Method) method.getValue(this);
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70 }
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71
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72 public void printValueOn(PrintStream tty) {
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73 Method m = getMethod();
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74 tty.print("MethodData for " + m.getName().asString() + m.getSignature().asString());
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75 }
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76
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77 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
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78 super.iterateFields(visitor, doVMFields);
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79 if (doVMFields) {
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80 visitor.doOop(method, true);
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81 visitor.doCInt(size, true);
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82 }
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83 }
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84 }
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