Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/code/ScopeDesc.java @ 931:72088be4b386
6873116: Modify reexecute implementation to use pcDesc to record the reexecute bit
Summary: use PcDesc to keep record of the reexecute bit instead of using DebugInfoStreams
Reviewed-by: kvn, never, twisti
| author | cfang |
|---|---|
| date | Thu, 20 Aug 2009 12:42:57 -0700 |
| parents | 15bbd3f505c0 |
| children | 873ec3787992 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 844 | 2 * Copyright 2000-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.code; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 | |
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30 import sun.jvm.hotspot.debugger.*; |
| 0 | 31 import sun.jvm.hotspot.oops.*; |
| 32 import sun.jvm.hotspot.runtime.*; | |
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33 import sun.jvm.hotspot.utilities.*; |
| 0 | 34 |
| 35 /** ScopeDescs contain the information that makes source-level | |
| 36 debugging of nmethods possible; each scopeDesc describes a method | |
| 37 activation */ | |
| 38 | |
| 39 public class ScopeDesc { | |
| 40 /** NMethod information */ | |
| 41 private NMethod code; | |
| 42 private Method method; | |
| 43 private int bci; | |
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44 private boolean reexecute; |
| 0 | 45 /** Decoding offsets */ |
| 46 private int decodeOffset; | |
| 47 private int senderDecodeOffset; | |
| 48 private int localsDecodeOffset; | |
| 49 private int expressionsDecodeOffset; | |
| 50 private int monitorsDecodeOffset; | |
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51 /** Scalar replaced bjects pool */ |
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52 private List objects; // ArrayList<ScopeValue> |
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53 |
| 0 | 54 |
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55 public ScopeDesc(NMethod code, int decodeOffset, boolean reexecute) { |
| 0 | 56 this.code = code; |
| 57 this.decodeOffset = decodeOffset; | |
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58 this.objects = decodeObjectValues(DebugInformationRecorder.SERIALIZED_NULL); |
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59 this.reexecute = reexecute; |
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60 |
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61 // Decode header |
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62 DebugInfoReadStream stream = streamAt(decodeOffset); |
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63 |
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64 senderDecodeOffset = stream.readInt(); |
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65 method = (Method) VM.getVM().getObjectHeap().newOop(stream.readOopHandle()); |
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66 bci = stream.readBCI(); |
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67 // Decode offsets for body and sender |
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68 localsDecodeOffset = stream.readInt(); |
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69 expressionsDecodeOffset = stream.readInt(); |
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70 monitorsDecodeOffset = stream.readInt(); |
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71 } |
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72 |
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73 public ScopeDesc(NMethod code, int decodeOffset, int objectDecodeOffset, boolean reexecute) { |
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74 this.code = code; |
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75 this.decodeOffset = decodeOffset; |
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76 this.objects = decodeObjectValues(objectDecodeOffset); |
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77 this.reexecute = reexecute; |
| 0 | 78 |
| 79 // Decode header | |
| 80 DebugInfoReadStream stream = streamAt(decodeOffset); | |
| 81 | |
| 82 senderDecodeOffset = stream.readInt(); | |
| 83 method = (Method) VM.getVM().getObjectHeap().newOop(stream.readOopHandle()); | |
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84 bci = stream.readBCI(); |
| 0 | 85 // Decode offsets for body and sender |
| 86 localsDecodeOffset = stream.readInt(); | |
| 87 expressionsDecodeOffset = stream.readInt(); | |
| 88 monitorsDecodeOffset = stream.readInt(); | |
| 89 } | |
| 90 | |
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91 public NMethod getNMethod() { return code; } |
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92 public Method getMethod() { return method; } |
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93 public int getBCI() { return bci; } |
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94 public boolean getReexecute() { return reexecute;} |
| 0 | 95 |
| 96 /** Returns a List<ScopeValue> */ | |
| 97 public List getLocals() { | |
| 98 return decodeScopeValues(localsDecodeOffset); | |
| 99 } | |
| 100 | |
| 101 /** Returns a List<ScopeValue> */ | |
| 102 public List getExpressions() { | |
| 103 return decodeScopeValues(expressionsDecodeOffset); | |
| 104 } | |
| 105 | |
| 106 /** Returns a List<MonitorValue> */ | |
| 107 public List getMonitors() { | |
| 108 return decodeMonitorValues(monitorsDecodeOffset); | |
| 109 } | |
| 110 | |
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111 /** Returns a List<MonitorValue> */ |
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112 public List getObjects() { |
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113 return objects; |
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114 } |
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115 |
| 0 | 116 /** Stack walking. Returns null if this is the outermost scope. */ |
| 117 public ScopeDesc sender() { | |
| 118 if (isTop()) { | |
| 119 return null; | |
| 120 } | |
| 121 | |
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122 return new ScopeDesc(code, senderDecodeOffset, false); |
| 0 | 123 } |
| 124 | |
| 125 /** Returns where the scope was decoded */ | |
| 126 public int getDecodeOffset() { | |
| 127 return decodeOffset; | |
| 128 } | |
| 129 | |
| 130 /** Tells whether sender() returns null */ | |
| 131 public boolean isTop() { | |
| 132 return (senderDecodeOffset == DebugInformationRecorder.SERIALIZED_NULL); | |
| 133 } | |
| 134 | |
| 135 public boolean equals(Object arg) { | |
| 136 if (arg == null) { | |
| 137 return false; | |
| 138 } | |
| 139 | |
| 140 if (!(arg instanceof ScopeDesc)) { | |
| 141 return false; | |
| 142 } | |
| 143 | |
| 144 ScopeDesc sd = (ScopeDesc) arg; | |
| 145 | |
| 146 return (sd.method.equals(method) && (sd.bci == bci)); | |
| 147 } | |
| 148 | |
| 149 public void printValue() { | |
| 150 printValueOn(System.out); | |
| 151 } | |
| 152 | |
| 153 public void printValueOn(PrintStream tty) { | |
| 154 tty.print("ScopeDesc for "); | |
| 155 method.printValueOn(tty); | |
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156 tty.print(" @bci " + bci); |
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157 tty.println(" reexecute=" + reexecute); |
| 0 | 158 } |
| 159 | |
| 160 // FIXME: add more accessors | |
| 161 | |
| 162 //-------------------------------------------------------------------------------- | |
| 163 // Internals only below this point | |
| 164 // | |
| 165 private DebugInfoReadStream streamAt(int decodeOffset) { | |
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166 return new DebugInfoReadStream(code, decodeOffset, objects); |
| 0 | 167 } |
| 168 | |
| 169 /** Returns a List<ScopeValue> or null if no values were present */ | |
| 170 private List decodeScopeValues(int decodeOffset) { | |
| 171 if (decodeOffset == DebugInformationRecorder.SERIALIZED_NULL) { | |
| 172 return null; | |
| 173 } | |
| 174 DebugInfoReadStream stream = streamAt(decodeOffset); | |
| 175 int length = stream.readInt(); | |
| 176 List res = new ArrayList(length); | |
| 177 for (int i = 0; i < length; i++) { | |
| 178 res.add(ScopeValue.readFrom(stream)); | |
| 179 } | |
| 180 return res; | |
| 181 } | |
| 182 | |
| 183 /** Returns a List<MonitorValue> or null if no values were present */ | |
| 184 private List decodeMonitorValues(int decodeOffset) { | |
| 185 if (decodeOffset == DebugInformationRecorder.SERIALIZED_NULL) { | |
| 186 return null; | |
| 187 } | |
| 188 DebugInfoReadStream stream = streamAt(decodeOffset); | |
| 189 int length = stream.readInt(); | |
| 190 List res = new ArrayList(length); | |
| 191 for (int i = 0; i < length; i++) { | |
| 192 res.add(new MonitorValue(stream)); | |
| 193 } | |
| 194 return res; | |
| 195 } | |
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196 |
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197 /** Returns a List<ObjectValue> or null if no values were present */ |
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198 private List decodeObjectValues(int decodeOffset) { |
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199 if (decodeOffset == DebugInformationRecorder.SERIALIZED_NULL) { |
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200 return null; |
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201 } |
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202 List res = new ArrayList(); |
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203 DebugInfoReadStream stream = new DebugInfoReadStream(code, decodeOffset, res); |
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204 int length = stream.readInt(); |
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205 for (int i = 0; i < length; i++) { |
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206 // Objects values are pushed to 'res' array during read so that |
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207 // object's fields could reference it (OBJECT_ID_CODE). |
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208 ScopeValue.readFrom(stream); |
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209 // res.add(ScopeValue.readFrom(stream)); |
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210 } |
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211 Assert.that(res.size() == length, "inconsistent debug information"); |
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212 return res; |
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213 } |
| 0 | 214 } |