Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/jdi/StackFrameImpl.java @ 3908:7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
Reviewed-by: kvn
| author | never |
|---|---|
| date | Mon, 05 Sep 2011 17:09:05 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2002, 2005, Oracle and/or its affiliates. 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 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.jdi; | |
| 26 | |
| 27 import com.sun.jdi.*; | |
| 28 import sun.jvm.hotspot.oops.ObjectHeap; | |
| 29 import sun.jvm.hotspot.debugger.OopHandle; | |
| 30 import sun.jvm.hotspot.oops.Array; | |
| 31 import sun.jvm.hotspot.oops.ObjArray; | |
| 32 import sun.jvm.hotspot.oops.TypeArray; | |
| 33 import sun.jvm.hotspot.oops.Instance; | |
| 34 import sun.jvm.hotspot.runtime.BasicType; | |
| 35 import sun.jvm.hotspot.runtime.JavaVFrame; | |
| 36 import sun.jvm.hotspot.runtime.StackValue; | |
| 37 import sun.jvm.hotspot.runtime.StackValueCollection; | |
| 38 import sun.jvm.hotspot.utilities.Assert; | |
| 39 import java.util.List; | |
| 40 import java.util.Map; | |
| 41 import java.util.ArrayList; | |
| 42 import java.util.HashMap; | |
| 43 import java.util.Iterator; | |
| 44 import java.util.Collections; | |
| 45 | |
| 46 public class StackFrameImpl extends MirrorImpl | |
| 47 implements StackFrame | |
| 48 { | |
| 49 /* Once false, frame should not be used. | |
| 50 * access synchronized on (vm.state()) | |
| 51 */ | |
| 52 private boolean isValid = true; | |
| 53 | |
| 54 private final ThreadReferenceImpl thread; | |
| 55 private final JavaVFrame saFrame; | |
| 56 private final Location location; | |
| 57 private Map visibleVariables = null; | |
| 58 private ObjectReference thisObject = null; | |
| 59 | |
| 60 StackFrameImpl(VirtualMachine vm, ThreadReferenceImpl thread, | |
| 61 JavaVFrame jvf) { | |
| 62 super(vm); | |
| 63 this.thread = thread; | |
| 64 this.saFrame = jvf; | |
| 65 | |
| 66 sun.jvm.hotspot.oops.Method SAMethod = jvf.getMethod(); | |
| 67 | |
| 68 ReferenceType rt = ((VirtualMachineImpl)vm).referenceType(SAMethod.getMethodHolder()); | |
| 69 | |
| 70 this.location = new LocationImpl(vm, rt, SAMethod, (long)jvf.getBCI()); | |
| 71 } | |
| 72 | |
| 73 private void validateStackFrame() { | |
| 74 if (!isValid) { | |
| 75 throw new InvalidStackFrameException("Thread has been resumed"); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 JavaVFrame getJavaVFrame() { | |
| 80 return saFrame; | |
| 81 } | |
| 82 | |
| 83 /** | |
| 84 * Return the frame location. | |
| 85 * Need not be synchronized since it cannot be provably stale. | |
| 86 */ | |
| 87 public Location location() { | |
| 88 validateStackFrame(); | |
| 89 return location; | |
| 90 } | |
| 91 | |
| 92 /** | |
| 93 * Return the thread holding the frame. | |
| 94 * Need not be synchronized since it cannot be provably stale. | |
| 95 */ | |
| 96 public ThreadReference thread() { | |
| 97 validateStackFrame(); | |
| 98 return thread; | |
| 99 } | |
| 100 | |
| 101 public boolean equals(Object obj) { | |
| 102 if ((obj != null) && (obj instanceof StackFrameImpl)) { | |
| 103 StackFrameImpl other = (StackFrameImpl)obj; | |
| 104 return (saFrame.equals(other.saFrame)); | |
| 105 } else { | |
| 106 return false; | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 public int hashCode() { | |
| 111 return saFrame.hashCode(); | |
| 112 } | |
| 113 | |
| 114 public ObjectReference thisObject() { | |
| 115 validateStackFrame(); | |
| 116 MethodImpl currentMethod = (MethodImpl)location.method(); | |
| 117 if (currentMethod.isStatic() || currentMethod.isNative()) { | |
| 118 return null; | |
| 119 } | |
| 120 if (thisObject == null) { | |
| 121 StackValueCollection values = saFrame.getLocals(); | |
| 122 if (Assert.ASSERTS_ENABLED) { | |
| 123 Assert.that(values.size() > 0, "this is missing"); | |
| 124 } | |
| 125 // 'this' at index 0. | |
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126 if (values.get(0).getType() == BasicType.getTConflict()) { |
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127 return null; |
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128 } |
| 0 | 129 OopHandle handle = values.oopHandleAt(0); |
| 130 ObjectHeap heap = vm.saObjectHeap(); | |
| 131 thisObject = vm.objectMirror(heap.newOop(handle)); | |
| 132 } | |
| 133 return thisObject; | |
| 134 } | |
| 135 | |
| 136 /** | |
| 137 * Build the visible variable map. | |
| 138 * Need not be synchronized since it cannot be provably stale. | |
| 139 */ | |
| 140 private void createVisibleVariables() throws AbsentInformationException { | |
| 141 if (visibleVariables == null) { | |
| 142 List allVariables = location.method().variables(); | |
| 143 Map map = new HashMap(allVariables.size()); | |
| 144 | |
| 145 Iterator iter = allVariables.iterator(); | |
| 146 while (iter.hasNext()) { | |
| 147 LocalVariableImpl variable = (LocalVariableImpl)iter.next(); | |
| 148 String name = variable.name(); | |
| 149 if (variable.isVisible(this)) { | |
| 150 LocalVariable existing = (LocalVariable)map.get(name); | |
| 151 if ((existing == null) || | |
| 152 variable.hides(existing)) { | |
| 153 map.put(name, variable); | |
| 154 } | |
| 155 } | |
| 156 } | |
| 157 visibleVariables = map; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 /** | |
| 162 * Return the list of visible variable in the frame. | |
| 163 * Need not be synchronized since it cannot be provably stale. | |
| 164 */ | |
| 165 public List visibleVariables() throws AbsentInformationException { | |
| 166 validateStackFrame(); | |
| 167 createVisibleVariables(); | |
| 168 List mapAsList = new ArrayList(visibleVariables.values()); | |
| 169 Collections.sort(mapAsList); | |
| 170 return mapAsList; | |
| 171 } | |
| 172 | |
| 173 /** | |
| 174 * Return a particular variable in the frame. | |
| 175 * Need not be synchronized since it cannot be provably stale. | |
| 176 */ | |
| 177 public LocalVariable visibleVariableByName(String name) throws AbsentInformationException { | |
| 178 validateStackFrame(); | |
| 179 createVisibleVariables(); | |
| 180 return (LocalVariable)visibleVariables.get(name); | |
| 181 } | |
| 182 | |
| 183 public Value getValue(LocalVariable variable) { | |
| 184 List list = new ArrayList(1); | |
| 185 list.add(variable); | |
| 186 Map map = getValues(list); | |
| 187 return (Value)map.get(variable); | |
| 188 } | |
| 189 | |
| 190 public Map getValues(List variables) { | |
| 191 validateStackFrame(); | |
| 192 StackValueCollection values = saFrame.getLocals(); | |
| 193 | |
| 194 int count = variables.size(); | |
| 195 Map map = new HashMap(count); | |
| 196 for (int ii=0; ii<count; ++ii) { | |
| 197 LocalVariableImpl variable = (LocalVariableImpl)variables.get(ii); | |
| 198 if (!variable.isVisible(this)) { | |
| 199 throw new IllegalArgumentException(variable.name() + | |
| 200 " is not valid at this frame location"); | |
| 201 } | |
| 202 ValueImpl valueImpl; | |
| 203 int ss = variable.slot(); | |
| 204 char c = variable.signature().charAt(0); | |
| 205 BasicType variableType = BasicType.charToBasicType(c); | |
| 206 valueImpl = getSlotValue(values, variableType, ss); | |
| 207 map.put(variable, valueImpl); | |
| 208 } | |
| 209 return map; | |
| 210 } | |
| 211 | |
| 212 public List getArgumentValues() { | |
| 213 validateStackFrame(); | |
| 214 StackValueCollection values = saFrame.getLocals(); | |
| 215 MethodImpl mmm = (MethodImpl)location.method(); | |
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216 if (mmm.isNative()) |
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217 return null; |
| 0 | 218 List argSigs = mmm.argumentSignatures(); |
| 219 int count = argSigs.size(); | |
| 220 List res = new ArrayList(0); | |
| 221 | |
| 222 int slot = mmm.isStatic()? 0 : 1; | |
| 223 for (int ii = 0; ii < count; ++slot, ++ii) { | |
| 224 char sigChar = ((String)argSigs.get(ii)).charAt(0); | |
| 225 BasicType variableType = BasicType.charToBasicType(sigChar); | |
| 226 res.add(getSlotValue(values, variableType, slot)); | |
| 227 if (sigChar == 'J' || sigChar == 'D') { | |
| 228 slot++; | |
| 229 } | |
| 230 } | |
| 231 return res; | |
| 232 } | |
| 233 | |
| 234 private ValueImpl getSlotValue(StackValueCollection values, | |
| 235 BasicType variableType, int ss) { | |
| 236 ValueImpl valueImpl = null; | |
| 237 OopHandle handle = null; | |
| 238 ObjectHeap heap = vm.saObjectHeap(); | |
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239 if (values.get(ss).getType() == BasicType.getTConflict()) { |
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240 // Dead locals, so just represent them as a zero of the appropriate type |
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241 if (variableType == BasicType.T_BOOLEAN) { |
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242 valueImpl = (BooleanValueImpl) vm.mirrorOf(false); |
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243 } else if (variableType == BasicType.T_CHAR) { |
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244 valueImpl = (CharValueImpl) vm.mirrorOf((char)0); |
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245 } else if (variableType == BasicType.T_FLOAT) { |
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246 valueImpl = (FloatValueImpl) vm.mirrorOf((float)0); |
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247 } else if (variableType == BasicType.T_DOUBLE) { |
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248 valueImpl = (DoubleValueImpl) vm.mirrorOf((double)0); |
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249 } else if (variableType == BasicType.T_BYTE) { |
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250 valueImpl = (ByteValueImpl) vm.mirrorOf((byte)0); |
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251 } else if (variableType == BasicType.T_SHORT) { |
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252 valueImpl = (ShortValueImpl) vm.mirrorOf((short)0); |
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253 } else if (variableType == BasicType.T_INT) { |
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254 valueImpl = (IntegerValueImpl) vm.mirrorOf((int)0); |
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255 } else if (variableType == BasicType.T_LONG) { |
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256 valueImpl = (LongValueImpl) vm.mirrorOf((long)0); |
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257 } else if (variableType == BasicType.T_OBJECT) { |
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258 // we may have an [Ljava/lang/Object; - i.e., Object[] with the |
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259 // elements themselves may be arrays because every array is an Object. |
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260 handle = null; |
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261 valueImpl = (ObjectReferenceImpl) vm.objectMirror(heap.newOop(handle)); |
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262 } else if (variableType == BasicType.T_ARRAY) { |
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263 handle = null; |
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264 valueImpl = vm.arrayMirror((Array)heap.newOop(handle)); |
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265 } else if (variableType == BasicType.T_VOID) { |
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266 valueImpl = new VoidValueImpl(vm); |
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267 } else { |
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268 throw new RuntimeException("Should not read here"); |
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269 } |
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270 } else { |
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271 if (variableType == BasicType.T_BOOLEAN) { |
| 0 | 272 valueImpl = (BooleanValueImpl) vm.mirrorOf(values.booleanAt(ss)); |
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273 } else if (variableType == BasicType.T_CHAR) { |
| 0 | 274 valueImpl = (CharValueImpl) vm.mirrorOf(values.charAt(ss)); |
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275 } else if (variableType == BasicType.T_FLOAT) { |
| 0 | 276 valueImpl = (FloatValueImpl) vm.mirrorOf(values.floatAt(ss)); |
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277 } else if (variableType == BasicType.T_DOUBLE) { |
| 0 | 278 valueImpl = (DoubleValueImpl) vm.mirrorOf(values.doubleAt(ss)); |
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279 } else if (variableType == BasicType.T_BYTE) { |
| 0 | 280 valueImpl = (ByteValueImpl) vm.mirrorOf(values.byteAt(ss)); |
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281 } else if (variableType == BasicType.T_SHORT) { |
| 0 | 282 valueImpl = (ShortValueImpl) vm.mirrorOf(values.shortAt(ss)); |
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283 } else if (variableType == BasicType.T_INT) { |
| 0 | 284 valueImpl = (IntegerValueImpl) vm.mirrorOf(values.intAt(ss)); |
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285 } else if (variableType == BasicType.T_LONG) { |
| 0 | 286 valueImpl = (LongValueImpl) vm.mirrorOf(values.longAt(ss)); |
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287 } else if (variableType == BasicType.T_OBJECT) { |
| 0 | 288 // we may have an [Ljava/lang/Object; - i.e., Object[] with the |
| 289 // elements themselves may be arrays because every array is an Object. | |
| 290 handle = values.oopHandleAt(ss); | |
| 291 valueImpl = (ObjectReferenceImpl) vm.objectMirror(heap.newOop(handle)); | |
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292 } else if (variableType == BasicType.T_ARRAY) { |
| 0 | 293 handle = values.oopHandleAt(ss); |
| 294 valueImpl = vm.arrayMirror((Array)heap.newOop(handle)); | |
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295 } else if (variableType == BasicType.T_VOID) { |
| 0 | 296 valueImpl = new VoidValueImpl(vm); |
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297 } else { |
| 0 | 298 throw new RuntimeException("Should not read here"); |
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299 } |
| 0 | 300 } |
| 301 | |
| 302 return valueImpl; | |
| 303 } | |
| 304 | |
| 305 public void setValue(LocalVariable variableIntf, Value valueIntf) | |
| 306 throws InvalidTypeException, ClassNotLoadedException { | |
| 307 | |
| 308 vm.throwNotReadOnlyException("StackFrame.setValue()"); | |
| 309 } | |
| 310 | |
| 311 public String toString() { | |
| 312 return location.toString() + " in thread " + thread.toString(); | |
| 313 } | |
| 314 } |