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1 /*
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2 * Copyright 2002-2003 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.runtime;
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26
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27 import java.util.*;
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28
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.oops.*;
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31 import sun.jvm.hotspot.types.*;
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32
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33 public class JNIid extends VMObject {
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34 private static sun.jvm.hotspot.types.OopField holder;
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35 private static AddressField next;
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36 private static CIntegerField offset;
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37 private static sun.jvm.hotspot.types.OopField resolvedMethod;
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38 private static sun.jvm.hotspot.types.OopField resolvedReceiver;
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39
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40 private ObjectHeap heap;
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41
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42 static {
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43 VM.registerVMInitializedObserver(new Observer() {
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44 public void update(Observable o, Object data) {
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45 initialize(VM.getVM().getTypeDataBase());
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46 }
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47 });
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48 }
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49
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50 private static synchronized void initialize(TypeDataBase db) {
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51
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52 // FIXME: JNIid has been removed as part of redesign of JNI method,
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53 // field ID generation. Please refer to src/share/vm/prims/jniId.hpp/.cpp
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54 // For now, commenting out the below code.
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55
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56 /***********************************************************
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57 Type type = db.lookupType("JNIid");
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58
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59 holder = type.getOopField("_holder");
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60 next = type.getAddressField("_next");
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61 offset = type.getCIntegerField("_offset");
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62 resolvedMethod = type.getOopField("_resolved_method");
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63 resolvedReceiver = type.getOopField("_resolved_receiver");
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64 ***********************************************************/
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65 }
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66
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67 public JNIid(Address addr, ObjectHeap heap) {
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68 super(addr);
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69 this.heap = heap;
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70 }
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71
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72 public JNIid next() {
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73 Address nextAddr = next.getValue(addr);
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74 if (nextAddr == null) {
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75 return null;
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76 }
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77 return new JNIid(nextAddr, heap);
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78 }
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79
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80 public Klass holder() { return (Klass) heap.newOop(holder.getValue(addr)); }
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81 public int offset() { return (int) offset.getValue(addr); }
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82 public Method method() {
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83 return (Method) ((InstanceKlass) holder()).getMethods().getObjAt(offset());
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84 }
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85 public Method resolvedMethod() { return (Method) heap.newOop(resolvedMethod.getValue(addr)); }
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86 public Klass resolvedReceiver() { return (Klass) heap.newOop(resolvedReceiver.getValue(addr)); }
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87 }
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