1 /*

     2  * Copyright (c) 2002, 2012, 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.runtime;

    26 

    27 import java.util.*;

    28 

    29 import sun.jvm.hotspot.debugger.*;

    30 import sun.jvm.hotspot.oops.*;

    31 import sun.jvm.hotspot.types.*;

    32 

    33 public class JNIid extends VMObject {

    34   private static MetadataField holder;

    35   private static AddressField next;

    36   private static CIntegerField offset;

    37   private static MetadataField resolvedMethod;

    38   private static MetadataField resolvedReceiver;

    39 

    40   private ObjectHeap heap;

    41 

    42   static {

    43     VM.registerVMInitializedObserver(new Observer() {

    44         public void update(Observable o, Object data) {

    45           initialize(VM.getVM().getTypeDataBase());

    46         }

    47       });

    48   }

    49 

    50   private static synchronized void initialize(TypeDataBase db) {

    51 

    52     // FIXME: JNIid has been removed as part of redesign of JNI method,

    53     // field ID generation. Please refer to src/share/vm/prims/jniId.hpp/.cpp

    54     // For now, commenting out the below code.

    55 

    56     /***********************************************************

    57     Type type = db.lookupType("JNIid");

    58 

    59     holder = type.getOopField("_holder");

    60     next = type.getAddressField("_next");

    61     offset = type.getCIntegerField("_offset");

    62     resolvedMethod = type.getOopField("_resolved_method");

    63     resolvedReceiver = type.getOopField("_resolved_receiver");

    64     ***********************************************************/

    65   }

    66 

    67   public JNIid(Address addr, ObjectHeap heap) {

    68     super(addr);

    69     this.heap = heap;

    70   }

    71 

    72   public JNIid next() {

    73     Address nextAddr = next.getValue(addr);

    74     if (nextAddr == null) {

    75       return null;

    76     }

    77     return new JNIid(nextAddr, heap);

    78   }

    79 

    80   public Klass     holder()           { return (Klass) holder.getValue(addr); }

    81   public int       offset()           { return (int) offset.getValue(addr); }

    82   public Method    method() {

    83     return ((InstanceKlass) holder()).getMethods().at(offset());

    84   }

    85   public Method    resolvedMethod()   { return (Method)resolvedMethod.getValue(addr); }

    86   public Klass     resolvedReceiver() { return (Klass) resolvedReceiver.getValue(addr); }

    87 }