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| 1 | /* | ||
| 2 | * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. | ||
| 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.tools.jdi; | ||
| 27 | |||
| 28 | import com.sun.jdi.*; | ||
| 29 | |||
| 30 | import java.util.List; | ||
| 31 | import java.util.Map; | ||
| 32 | import java.util.Iterator; | ||
| 33 | import java.util.ListIterator; | ||
| 34 | import java.util.HashMap; | ||
| 35 | import java.util.ArrayList; | ||
| 36 | import java.util.Collections; | ||
| 37 | import java.lang.ref.SoftReference; | ||
| 38 | |||
| 39 | /** | ||
| 40 | * Represents methods with method bodies. | ||
| 41 | * That is, non-native non-abstract methods. | ||
| 42 | * Private to MethodImpl. | ||
| 43 | */ | ||
| 44 | public class ConcreteMethodImpl extends MethodImpl { | ||
| 45 | |||
| 46 | /* | ||
| 47 | * A subset of the line number info that is softly cached | ||
| 48 | */ | ||
| 49 | static private class SoftLocationXRefs { | ||
| 50 | final String stratumID; // The stratum of this information | ||
| 51 | final Map<Integer, List<Location>> lineMapper; // Maps line number to location(s) | ||
| 52 | final List<Location> lineLocations; // List of locations ordered by code index | ||
| 53 | |||
| 54 | /* | ||
| 55 | * Note: these do not necessarily correspond to | ||
| 56 | * the line numbers of the first and last elements | ||
| 57 | * in the lineLocations list. Use these only for bounds | ||
| 58 | * checking and with lineMapper. | ||
| 59 | */ | ||
| 60 | final int lowestLine; | ||
| 61 | final int highestLine; | ||
| 62 | |||
| 63 | SoftLocationXRefs(String stratumID, Map<Integer, List<Location>> lineMapper, List<Location> lineLocations, | ||
| 64 | int lowestLine, int highestLine) { | ||
| 65 | this.stratumID = stratumID; | ||
| 66 | this.lineMapper = Collections.unmodifiableMap(lineMapper); | ||
| 67 | this.lineLocations = | ||
| 68 | Collections.unmodifiableList(lineLocations); | ||
| 69 | this.lowestLine = lowestLine; | ||
| 70 | this.highestLine = highestLine; | ||
| 71 | } | ||
| 72 | } | ||
| 73 | |||
| 74 | private Location location = null; | ||
| 75 | private SoftReference<SoftLocationXRefs> softBaseLocationXRefsRef; | ||
| 76 | private SoftReference<SoftLocationXRefs> softOtherLocationXRefsRef; | ||
| 77 | private SoftReference<List<LocalVariable>> variablesRef = null; | ||
| 78 | private boolean absentVariableInformation = false; | ||
| 79 | private long firstIndex = -1; | ||
| 80 | private long lastIndex = -1; | ||
| 81 | private SoftReference<byte[]> bytecodesRef = null; | ||
| 82 | private int argSlotCount = -1; | ||
| 83 | |||
| 84 | ConcreteMethodImpl(VirtualMachine vm, ReferenceTypeImpl declaringType, | ||
| 85 | long ref, | ||
| 86 | String name, String signature, | ||
| 87 | String genericSignature, int modifiers) { | ||
| 88 | |||
| 89 | // The generic signature is set when this is created | ||
| 90 | super(vm, declaringType, ref, name, signature, | ||
| 91 | genericSignature, modifiers); | ||
| 92 | } | ||
| 93 | |||
| 94 | public Location location() { | ||
| 95 | if (location == null) { | ||
| 96 | getBaseLocations(); | ||
| 97 | } | ||
| 98 | return location; | ||
| 99 | } | ||
| 100 | |||
| 101 | List<Location> sourceNameFilter(List<Location> list, | ||
| 102 | SDE.Stratum stratum, | ||
| 103 | String sourceName) | ||
| 104 | throws AbsentInformationException { | ||
| 105 | if (sourceName == null) { | ||
| 106 | return list; | ||
| 107 | } else { | ||
| 108 | /* needs sourceName filteration */ | ||
| 109 | List<Location> locs = new ArrayList<Location>(); | ||
| 110 | for (Location loc : list) { | ||
| 111 | if (((LocationImpl)loc).sourceName(stratum).equals(sourceName)) { | ||
| 112 | locs.add(loc); | ||
| 113 | } | ||
| 114 | } | ||
| 115 | return locs; | ||
| 116 | } | ||
| 117 | } | ||
| 118 | |||
| 119 | List<Location> allLineLocations(SDE.Stratum stratum, | ||
| 120 | String sourceName) | ||
| 121 | throws AbsentInformationException { | ||
| 122 | List<Location> lineLocations = getLocations(stratum).lineLocations; | ||
| 123 | |||
| 124 | if (lineLocations.size() == 0) { | ||
| 125 | throw new AbsentInformationException(); | ||
| 126 | } | ||
| 127 | |||
| 128 | return Collections.unmodifiableList( | ||
| 129 | sourceNameFilter(lineLocations, stratum, sourceName)); | ||
| 130 | } | ||
| 131 | |||
| 132 | List<Location> locationsOfLine(SDE.Stratum stratum, | ||
| 133 | String sourceName, | ||
| 134 | int lineNumber) | ||
| 135 | throws AbsentInformationException { | ||
| 136 | SoftLocationXRefs info = getLocations(stratum); | ||
| 137 | |||
| 138 | if (info.lineLocations.size() == 0) { | ||
| 139 | throw new AbsentInformationException(); | ||
| 140 | } | ||
| 141 | |||
| 142 | /* | ||
| 143 | * Find the locations which match the line number | ||
| 144 | * passed in. | ||
| 145 | */ | ||
| 146 | List<Location> list = info.lineMapper.get(new Integer(lineNumber)); | ||
| 147 | |||
| 148 | if (list == null) { | ||
| 149 | list = new ArrayList<Location>(0); | ||
| 150 | } | ||
| 151 | return Collections.unmodifiableList( | ||
| 152 | sourceNameFilter(list, stratum, sourceName)); | ||
| 153 | } | ||
| 154 | |||
| 155 | |||
| 156 | public Location locationOfCodeIndex(long codeIndex) { | ||
| 157 | if (firstIndex == -1) { | ||
| 158 | getBaseLocations(); | ||
| 159 | } | ||
| 160 | |||
| 161 | /* | ||
| 162 | * Check for invalid code index. | ||
| 163 | */ | ||
| 164 | if (codeIndex < firstIndex || codeIndex > lastIndex) { | ||
| 165 | return null; | ||
| 166 | } | ||
| 167 | |||
| 168 | return new LocationImpl(virtualMachine(), this, codeIndex); | ||
| 169 | } | ||
| 170 | |||
| 171 | |||
| 172 | LineInfo codeIndexToLineInfo(SDE.Stratum stratum, | ||
| 173 | long codeIndex) { | ||
| 174 | if (firstIndex == -1) { | ||
| 175 | getBaseLocations(); | ||
| 176 | } | ||
| 177 | |||
| 178 | /* | ||
| 179 | * Check for invalid code index. | ||
| 180 | */ | ||
| 181 | if (codeIndex < firstIndex || codeIndex > lastIndex) { | ||
| 182 | throw new InternalError( | ||
| 183 | "Location with invalid code index"); | ||
| 184 | } | ||
| 185 | |||
| 186 | List<Location> lineLocations = getLocations(stratum).lineLocations; | ||
| 187 | |||
| 188 | /* | ||
| 189 | * Check for absent line numbers. | ||
| 190 | */ | ||
| 191 | if (lineLocations.size() == 0) { | ||
| 192 | return super.codeIndexToLineInfo(stratum, codeIndex); | ||
| 193 | } | ||
| 194 | |||
| 195 | Iterator iter = lineLocations.iterator(); | ||
| 196 | /* | ||
| 197 | * Treat code before the beginning of the first line table | ||
| 198 | * entry as part of the first line. javac will generate | ||
| 199 | * code like this for some local classes. This "prolog" | ||
| 200 | * code contains assignments from locals in the enclosing | ||
| 201 | * scope to synthetic fields in the local class. Same for | ||
| 202 | * other language prolog code. | ||
| 203 | */ | ||
| 204 | LocationImpl bestMatch = (LocationImpl)iter.next(); | ||
| 205 | while (iter.hasNext()) { | ||
| 206 | LocationImpl current = (LocationImpl)iter.next(); | ||
| 207 | if (current.codeIndex() > codeIndex) { | ||
| 208 | break; | ||
| 209 | } | ||
| 210 | bestMatch = current; | ||
| 211 | } | ||
| 212 | return bestMatch.getLineInfo(stratum); | ||
| 213 | } | ||
| 214 | |||
| 215 | |||
| 216 | public List<LocalVariable> variables() throws AbsentInformationException { | ||
| 217 | return getVariables(); | ||
| 218 | } | ||
| 219 | |||
| 220 | public List<LocalVariable> variablesByName(String name) throws AbsentInformationException { | ||
| 221 | List<LocalVariable> variables = getVariables(); | ||
| 222 | |||
| 223 | List<LocalVariable> retList = new ArrayList<LocalVariable>(2); | ||
| 224 | Iterator iter = variables.iterator(); | ||
| 225 | while(iter.hasNext()) { | ||
| 226 | LocalVariable variable = (LocalVariable)iter.next(); | ||
| 227 | if (variable.name().equals(name)) { | ||
| 228 | retList.add(variable); | ||
| 229 | } | ||
| 230 | } | ||
| 231 | return retList; | ||
| 232 | } | ||
| 233 | |||
| 234 | public List<LocalVariable> arguments() throws AbsentInformationException { | ||
| 235 | List<LocalVariable> variables = getVariables(); | ||
| 236 | |||
| 237 | List<LocalVariable> retList = new ArrayList<LocalVariable>(variables.size()); | ||
| 238 | Iterator iter = variables.iterator(); | ||
| 239 | while(iter.hasNext()) { | ||
| 240 | LocalVariable variable = (LocalVariable)iter.next(); | ||
| 241 | if (variable.isArgument()) { | ||
| 242 | retList.add(variable); | ||
| 243 | } | ||
| 244 | } | ||
| 245 | return retList; | ||
| 246 | } | ||
| 247 | |||
| 248 | public byte[] bytecodes() { | ||
| 249 | byte[] bytecodes = (bytecodesRef == null) ? null : | ||
| 250 | bytecodesRef.get(); | ||
| 251 | if (bytecodes == null) { | ||
| 252 | try { | ||
| 253 | bytecodes = JDWP.Method.Bytecodes. | ||
| 254 | process(vm, declaringType, ref).bytes; | ||
| 255 | } catch (JDWPException exc) { | ||
| 256 | throw exc.toJDIException(); | ||
| 257 | } | ||
| 258 | bytecodesRef = new SoftReference<byte[]>(bytecodes); | ||
| 259 | } | ||
| 260 | /* | ||
| 261 | * Arrays are always modifiable, so it is a little unsafe | ||
| 262 | * to return the cached bytecodes directly; instead, we | ||
| 263 | * make a clone at the cost of using more memory. | ||
| 264 | */ | ||
| 265 | return bytecodes.clone(); | ||
| 266 | } | ||
| 267 | |||
| 268 | int argSlotCount() throws AbsentInformationException { | ||
| 269 | if (argSlotCount == -1) { | ||
| 270 | getVariables(); | ||
| 271 | } | ||
| 272 | return argSlotCount; | ||
| 273 | } | ||
| 274 | |||
| 275 | private SoftLocationXRefs getLocations(SDE.Stratum stratum) { | ||
| 276 | if (stratum.isJava()) { | ||
| 277 | return getBaseLocations(); | ||
| 278 | } | ||
| 279 | String stratumID = stratum.id(); | ||
| 280 | SoftLocationXRefs info = | ||
| 281 | (softOtherLocationXRefsRef == null) ? null : | ||
| 282 | softOtherLocationXRefsRef.get(); | ||
| 283 | if (info != null && info.stratumID.equals(stratumID)) { | ||
| 284 | return info; | ||
| 285 | } | ||
| 286 | |||
| 287 | List<Location> lineLocations = new ArrayList<Location>(); | ||
| 288 | Map<Integer, List<Location>> lineMapper = new HashMap<Integer, List<Location>>(); | ||
| 289 | int lowestLine = -1; | ||
| 290 | int highestLine = -1; | ||
| 291 | SDE.LineStratum lastLineStratum = null; | ||
| 292 | SDE.Stratum baseStratum = | ||
| 293 | declaringType.stratum(SDE.BASE_STRATUM_NAME); | ||
| 294 | Iterator it = getBaseLocations().lineLocations.iterator(); | ||
| 295 | while(it.hasNext()) { | ||
| 296 | LocationImpl loc = (LocationImpl)it.next(); | ||
| 297 | int baseLineNumber = loc.lineNumber(baseStratum); | ||
| 298 | SDE.LineStratum lineStratum = | ||
| 299 | stratum.lineStratum(declaringType, | ||
| 300 | baseLineNumber); | ||
| 301 | |||
| 302 | if (lineStratum == null) { | ||
| 303 | // location not mapped in this stratum | ||
| 304 | continue; | ||
| 305 | } | ||
| 306 | |||
| 307 | int lineNumber = lineStratum.lineNumber(); | ||
| 308 | |||
| 309 | // remove unmapped and dup lines | ||
| 310 | if ((lineNumber != -1) && | ||
| 311 | (!lineStratum.equals(lastLineStratum))) { | ||
| 312 | lastLineStratum = lineStratum; | ||
| 313 | |||
| 314 | // Remember the largest/smallest line number | ||
| 315 | if (lineNumber > highestLine) { | ||
| 316 | highestLine = lineNumber; | ||
| 317 | } | ||
| 318 | if ((lineNumber < lowestLine) || (lowestLine == -1)) { | ||
| 319 | lowestLine = lineNumber; | ||
| 320 | } | ||
| 321 | |||
| 322 | loc.addStratumLineInfo( | ||
| 323 | new StratumLineInfo(stratumID, | ||
| 324 | lineNumber, | ||
| 325 | lineStratum.sourceName(), | ||
| 326 | lineStratum.sourcePath())); | ||
| 327 | |||
| 328 | // Add to the location list | ||
| 329 | lineLocations.add(loc); | ||
| 330 | |||
| 331 | // Add to the line -> locations map | ||
| 332 | Integer key = new Integer(lineNumber); | ||
| 333 | List<Location> mappedLocs = lineMapper.get(key); | ||
| 334 | if (mappedLocs == null) { | ||
| 335 | mappedLocs = new ArrayList<Location>(1); | ||
| 336 | lineMapper.put(key, mappedLocs); | ||
| 337 | } | ||
| 338 | mappedLocs.add(loc); | ||
| 339 | } | ||
| 340 | } | ||
| 341 | |||
| 342 | info = new SoftLocationXRefs(stratumID, | ||
| 343 | lineMapper, lineLocations, | ||
| 344 | lowestLine, highestLine); | ||
| 345 | softOtherLocationXRefsRef = new SoftReference<SoftLocationXRefs>(info); | ||
| 346 | return info; | ||
| 347 | } | ||
| 348 | |||
| 349 | private SoftLocationXRefs getBaseLocations() { | ||
| 350 | SoftLocationXRefs info = (softBaseLocationXRefsRef == null) ? null : | ||
| 351 | softBaseLocationXRefsRef.get(); | ||
| 352 | if (info != null) { | ||
| 353 | return info; | ||
| 354 | } | ||
| 355 | |||
| 356 | JDWP.Method.LineTable lntab = null; | ||
| 357 | try { | ||
| 358 | lntab = JDWP.Method.LineTable.process(vm, declaringType, ref); | ||
| 359 | } catch (JDWPException exc) { | ||
| 360 | /* | ||
| 361 | * Note: the absent info error shouldn't happen here | ||
| 362 | * because the first and last index are always available. | ||
| 363 | */ | ||
| 364 | throw exc.toJDIException(); | ||
| 365 | } | ||
| 366 | |||
| 367 | int count = lntab.lines.length; | ||
| 368 | |||
| 369 | List<Location> lineLocations = new ArrayList<Location>(count); | ||
| 370 | Map<Integer, List<Location>>lineMapper = new HashMap<Integer, List<Location>>(); | ||
| 371 | int lowestLine = -1; | ||
| 372 | int highestLine = -1; | ||
| 373 | for (int i = 0; i < count; i++) { | ||
| 374 | long bci = lntab.lines[i].lineCodeIndex; | ||
| 375 | int lineNumber = lntab.lines[i].lineNumber; | ||
| 376 | |||
| 377 | /* | ||
| 378 | * Some compilers will point multiple consecutive | ||
| 379 | * lines at the same location. We need to choose | ||
| 380 | * one of them so that we can consistently map back | ||
| 381 | * and forth between line and location. So we choose | ||
| 382 | * to record only the last line entry at a particular | ||
| 383 | * location. | ||
| 384 | */ | ||
| 385 | if ((i + 1 == count) || (bci != lntab.lines[i+1].lineCodeIndex)) { | ||
| 386 | // Remember the largest/smallest line number | ||
| 387 | if (lineNumber > highestLine) { | ||
| 388 | highestLine = lineNumber; | ||
| 389 | } | ||
| 390 | if ((lineNumber < lowestLine) || (lowestLine == -1)) { | ||
| 391 | lowestLine = lineNumber; | ||
| 392 | } | ||
| 393 | LocationImpl loc = | ||
| 394 | new LocationImpl(virtualMachine(), this, bci); | ||
| 395 | loc.addBaseLineInfo( | ||
| 396 | new BaseLineInfo(lineNumber, declaringType)); | ||
| 397 | |||
| 398 | // Add to the location list | ||
| 399 | lineLocations.add(loc); | ||
| 400 | |||
| 401 | // Add to the line -> locations map | ||
| 402 | Integer key = new Integer(lineNumber); | ||
| 403 | List<Location> mappedLocs = lineMapper.get(key); | ||
| 404 | if (mappedLocs == null) { | ||
| 405 | mappedLocs = new ArrayList<Location>(1); | ||
| 406 | lineMapper.put(key, mappedLocs); | ||
| 407 | } | ||
| 408 | mappedLocs.add(loc); | ||
| 409 | } | ||
| 410 | } | ||
| 411 | |||
| 412 | /* | ||
| 413 | * firstIndex, lastIndex, and startLocation need to be | ||
| 414 | * retrieved only once since they are strongly referenced. | ||
| 415 | */ | ||
| 416 | if (location == null) { | ||
| 417 | firstIndex = lntab.start; | ||
| 418 | lastIndex = lntab.end; | ||
| 419 | /* | ||
| 420 | * The startLocation is the first one in the | ||
| 421 | * location list if we have one; | ||
| 422 | * otherwise, we construct a location for a | ||
| 423 | * method start with no line info | ||
| 424 | */ | ||
| 425 | if (count > 0) { | ||
| 426 | location = lineLocations.get(0); | ||
| 427 | } else { | ||
| 428 | location = new LocationImpl(virtualMachine(), this, | ||
| 429 | firstIndex); | ||
| 430 | } | ||
| 431 | } | ||
| 432 | |||
| 433 | info = new SoftLocationXRefs(SDE.BASE_STRATUM_NAME, | ||
| 434 | lineMapper, lineLocations, | ||
| 435 | lowestLine, highestLine); | ||
| 436 | softBaseLocationXRefsRef = new SoftReference<SoftLocationXRefs>(info); | ||
| 437 | return info; | ||
| 438 | } | ||
| 439 | |||
| 440 | private List<LocalVariable> getVariables1_4() throws AbsentInformationException { | ||
| 441 | JDWP.Method.VariableTable vartab = null; | ||
| 442 | try { | ||
| 443 | vartab = JDWP.Method.VariableTable. | ||
| 444 | process(vm, declaringType, ref); | ||
| 445 | } catch (JDWPException exc) { | ||
| 446 | if (exc.errorCode() == JDWP.Error.ABSENT_INFORMATION) { | ||
| 447 | absentVariableInformation = true; | ||
| 448 | throw new AbsentInformationException(); | ||
| 449 | } else { | ||
| 450 | throw exc.toJDIException(); | ||
| 451 | } | ||
| 452 | } | ||
| 453 | |||
| 454 | // Get the number of slots used by argument variables | ||
| 455 | argSlotCount = vartab.argCnt; | ||
| 456 | int count = vartab.slots.length; | ||
| 457 | List<LocalVariable> variables = new ArrayList<LocalVariable>(count); | ||
| 458 | for (int i=0; i<count; i++) { | ||
| 459 | JDWP.Method.VariableTable.SlotInfo si = vartab.slots[i]; | ||
| 460 | |||
| 461 | /* | ||
| 462 | * Skip "this*" entries because they are never real | ||
| 463 | * variables from the JLS perspective. | ||
| 464 | */ | ||
| 465 | if (!si.name.startsWith("this$") && !si.name.equals("this")) { | ||
| 466 | Location scopeStart = new LocationImpl(virtualMachine(), | ||
| 467 | this, si.codeIndex); | ||
| 468 | Location scopeEnd = | ||
| 469 | new LocationImpl(virtualMachine(), this, | ||
| 470 | si.codeIndex + si.length - 1); | ||
| 471 | LocalVariable variable = | ||
| 472 | new LocalVariableImpl(virtualMachine(), this, | ||
| 473 | si.slot, scopeStart, scopeEnd, | ||
| 474 | si.name, si.signature, null); | ||
| 475 | // Add to the variable list | ||
| 476 | variables.add(variable); | ||
| 477 | } | ||
| 478 | } | ||
| 479 | return variables; | ||
| 480 | } | ||
| 481 | |||
| 482 | private List<LocalVariable> getVariables1() throws AbsentInformationException { | ||
| 483 | |||
| 484 | if (!vm.canGet1_5LanguageFeatures()) { | ||
| 485 | return getVariables1_4(); | ||
| 486 | } | ||
| 487 | |||
| 488 | JDWP.Method.VariableTableWithGeneric vartab = null; | ||
| 489 | try { | ||
| 490 | vartab = JDWP.Method.VariableTableWithGeneric. | ||
| 491 | process(vm, declaringType, ref); | ||
| 492 | } catch (JDWPException exc) { | ||
| 493 | if (exc.errorCode() == JDWP.Error.ABSENT_INFORMATION) { | ||
| 494 | absentVariableInformation = true; | ||
| 495 | throw new AbsentInformationException(); | ||
| 496 | } else { | ||
| 497 | throw exc.toJDIException(); | ||
| 498 | } | ||
| 499 | } | ||
| 500 | |||
| 501 | // Get the number of slots used by argument variables | ||
| 502 | argSlotCount = vartab.argCnt; | ||
| 503 | int count = vartab.slots.length; | ||
| 504 | List<LocalVariable> variables = new ArrayList<LocalVariable>(count); | ||
| 505 | for (int i=0; i<count; i++) { | ||
| 506 | JDWP.Method.VariableTableWithGeneric.SlotInfo si = vartab.slots[i]; | ||
| 507 | |||
| 508 | /* | ||
| 509 | * Skip "this*" entries because they are never real | ||
| 510 | * variables from the JLS perspective. | ||
| 511 | */ | ||
| 512 | if (!si.name.startsWith("this$") && !si.name.equals("this")) { | ||
| 513 | Location scopeStart = new LocationImpl(virtualMachine(), | ||
| 514 | this, si.codeIndex); | ||
| 515 | Location scopeEnd = | ||
| 516 | new LocationImpl(virtualMachine(), this, | ||
| 517 | si.codeIndex + si.length - 1); | ||
| 518 | LocalVariable variable = | ||
| 519 | new LocalVariableImpl(virtualMachine(), this, | ||
| 520 | si.slot, scopeStart, scopeEnd, | ||
| 521 | si.name, si.signature, | ||
| 522 | si.genericSignature); | ||
| 523 | // Add to the variable list | ||
| 524 | variables.add(variable); | ||
| 525 | } | ||
| 526 | } | ||
| 527 | return variables; | ||
| 528 | } | ||
| 529 | |||
| 530 | private List<LocalVariable> getVariables() throws AbsentInformationException { | ||
| 531 | if (absentVariableInformation) { | ||
| 532 | throw new AbsentInformationException(); | ||
| 533 | } | ||
| 534 | |||
| 535 | List<LocalVariable> variables = (variablesRef == null) ? null : | ||
| 536 | variablesRef.get(); | ||
| 537 | if (variables != null) { | ||
| 538 | return variables; | ||
| 539 | } | ||
| 540 | variables = getVariables1(); | ||
| 541 | variables = Collections.unmodifiableList(variables); | ||
| 542 | variablesRef = new SoftReference<List<LocalVariable>>(variables); | ||
| 543 | return variables; | ||
| 544 | } | ||
| 545 | } | ||