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annotate agent/src/share/classes/sun/jvm/hotspot/code/DebugInfoReadStream.java @ 903:15bbd3f505c0

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Merge
author kvn
date Thu, 06 Aug 2009 09:37:26 -0700
parents bd02caa94611 9987d9d5eb0e
children 72088be4b386
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1 /*
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2 * Copyright 2000-2009 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.code;
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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.runtime.VM;
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31 import sun.jvm.hotspot.utilities.*;
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32
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33 public class DebugInfoReadStream extends CompressedReadStream {
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34 private NMethod code;
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35 private int InvocationEntryBCI;
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36 private List objectPool; // ArrayList<ObjectValue>
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37
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38 public DebugInfoReadStream(NMethod code, int offset) {
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39 super(code.scopesDataBegin(), offset);
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40 InvocationEntryBCI = VM.getVM().getInvocationEntryBCI();
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41 this.code = code;
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42 this.objectPool = null;
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43 }
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45 public DebugInfoReadStream(NMethod code, int offset, List objectPool) {
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46 super(code.scopesDataBegin(), offset);
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47 InvocationEntryBCI = VM.getVM().getInvocationEntryBCI();
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48 this.code = code;
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49 this.objectPool = objectPool;
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50 }
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51
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52 public OopHandle readOopHandle() {
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53 return code.getOopAt(readInt());
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54 }
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55
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56 ScopeValue readObjectValue() {
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57 int id = readInt();
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58 if (Assert.ASSERTS_ENABLED) {
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59 Assert.that(objectPool != null, "object pool does not exist");
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60 for (Iterator itr = objectPool.iterator(); itr.hasNext();) {
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61 ObjectValue ov = (ObjectValue) itr.next();
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62 Assert.that(ov.id() != id, "should not be read twice");
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63 }
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64 }
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65 ObjectValue result = new ObjectValue(id);
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66 // Cache the object since an object field could reference it.
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67 objectPool.add(result);
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68 result.readObject(this);
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69 return result;
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70 }
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71
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72 ScopeValue getCachedObject() {
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73 int id = readInt();
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74 Assert.that(objectPool != null, "object pool does not exist");
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75 for (Iterator itr = objectPool.iterator(); itr.hasNext();) {
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76 ObjectValue ov = (ObjectValue) itr.next();
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77 if (ov.id() == id) {
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78 return ov;
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79 }
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80 }
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81 Assert.that(false, "should not reach here");
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82 return null;
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83 }
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84 }