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1 /*
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2 * Copyright 2000-2004 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.compiler;
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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.code.*;
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30 import sun.jvm.hotspot.debugger.*;
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31 import sun.jvm.hotspot.runtime.*;
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32 import sun.jvm.hotspot.types.*;
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33
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34 public class OopMap extends VMObject {
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35 private static CIntegerField pcOffsetField;
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36 private static CIntegerField omvCountField;
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37 private static CIntegerField omvDataSizeField;
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38 private static AddressField omvDataField;
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39 private static AddressField compressedWriteStreamField;
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40
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41 // This is actually a field inside class CompressedStream
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42 private static AddressField compressedStreamBufferField;
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43
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44 static {
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45 VM.registerVMInitializedObserver(new Observer() {
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46 public void update(Observable o, Object data) {
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47 initialize(VM.getVM().getTypeDataBase());
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48 }
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49 });
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50 }
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51
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52 private static void initialize(TypeDataBase db) {
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53 Type type = db.lookupType("OopMap");
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54
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55 pcOffsetField = type.getCIntegerField("_pc_offset");
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56 omvCountField = type.getCIntegerField("_omv_count");
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57 omvDataSizeField = type.getCIntegerField("_omv_data_size");
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58 omvDataField = type.getAddressField("_omv_data");
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59 compressedWriteStreamField = type.getAddressField("_write_stream");
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60
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61 type = db.lookupType("CompressedStream");
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62 compressedStreamBufferField = type.getAddressField("_buffer");
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63 }
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64
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65 public OopMap(Address addr) {
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66 super(addr);
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67 }
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68
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69 public long getOffset() {
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70 return pcOffsetField.getValue(addr);
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71 }
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72
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73 //--------------------------------------------------------------------------------
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74 // Internals only below this point
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75 //
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76
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77 // Accessors -- package private for now
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78 Address getOMVData() {
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79 return omvDataField.getValue(addr);
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80 }
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81
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82 long getOMVDataSize() {
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83 return omvDataSizeField.getValue(addr);
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84 }
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85
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86 long getOMVCount() {
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87 return omvCountField.getValue(addr);
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88 }
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89
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90 CompressedWriteStream getWriteStream() {
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91 Address wsAddr = compressedWriteStreamField.getValue(addr);
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92 if (wsAddr == null) {
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93 return null;
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94 }
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95 Address bufferAddr = compressedStreamBufferField.getValue(wsAddr);
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96 if (bufferAddr == null) {
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97 return null;
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98 }
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99 return new CompressedWriteStream(bufferAddr);
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100 }
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101 }
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