AMD64JavaCallWrapper.java revision 9883:903a2e023ffb 
1/*
2 * Copyright (c) 2003, 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
25package sun.jvm.hotspot.runtime.amd64;
26
27import java.util.*;
28import sun.jvm.hotspot.debugger.*;
29import sun.jvm.hotspot.types.*;
30import sun.jvm.hotspot.runtime.*;
31
32public class AMD64JavaCallWrapper extends JavaCallWrapper {
33  private static AddressField lastJavaFPField;
34
35  static {
36    VM.registerVMInitializedObserver(new Observer() {
37        public void update(Observable o, Object data) {
38          initialize(VM.getVM().getTypeDataBase());
39        }
40      });
41  }
42
43  private static synchronized void initialize(TypeDataBase db) {
44    Type type = db.lookupType("JavaFrameAnchor");
45
46    lastJavaFPField  = type.getAddressField("_last_Java_fp");
47  }
48
49  public AMD64JavaCallWrapper(Address addr) {
50    super(addr);
51  }
52
53  public Address getLastJavaFP() {
54    return lastJavaFPField.getValue(addr.addOffsetTo(anchorField.getOffset()));
55  }
56}
57