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annotate agent/src/share/classes/sun/jvm/hotspot/runtime/x86/X86RicochetFrame.java @ 3908:7588156f5cf9

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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244) Reviewed-by: kvn
author never
date Mon, 05 Sep 2011 17:09:05 -0700
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3908
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * 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.x86;
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26
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27 import java.util.*;
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28 import sun.jvm.hotspot.debugger.*;
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29 import sun.jvm.hotspot.runtime.*;
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30 import sun.jvm.hotspot.types.*;
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31
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32 public class X86RicochetFrame extends VMObject {
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33 static {
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34 VM.registerVMInitializedObserver(new Observer() {
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35 public void update(Observable o, Object data) {
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36 initialize(VM.getVM().getTypeDataBase());
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37 }
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38 });
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39 }
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40
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41 private static void initialize(TypeDataBase db) {
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42 Type type = db.lookupType("MethodHandles::RicochetFrame");
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43
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44 senderLinkField = type.getAddressField("_sender_link");
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45 savedArgsBaseField = type.getAddressField("_saved_args_base");
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46 exactSenderSPField = type.getAddressField("_exact_sender_sp");
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47 senderPCField = type.getAddressField("_sender_pc");
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48 }
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49
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50 private static AddressField senderLinkField;
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51 private static AddressField savedArgsBaseField;
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52 private static AddressField exactSenderSPField;
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53 private static AddressField senderPCField;
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54
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55 static X86RicochetFrame fromFrame(X86Frame f) {
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56 return new X86RicochetFrame(f.getFP().addOffsetTo(- senderLinkField.getOffset()));
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57 }
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58
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59 private X86RicochetFrame(Address addr) {
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60 super(addr);
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61 }
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62
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63 public Address senderLink() {
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64 return senderLinkField.getValue(addr);
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65 }
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66 public Address senderLinkAddress() {
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67 return addr.addOffsetTo(senderLinkField.getOffset());
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68 }
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69 public Address savedArgsBase() {
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70 return savedArgsBaseField.getValue(addr);
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71 }
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72 public Address extendedSenderSP() {
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73 return savedArgsBase();
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74 }
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75 public Address exactSenderSP() {
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76 return exactSenderSPField.getValue(addr);
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77 }
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78 public Address senderPC() {
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79 return senderPCField.getValue(addr);
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80 }
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81 }