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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 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.example.debug.expr; | ||
| 27 | |||
| 28 | import com.sun.jdi.*; | ||
| 29 | import java.util.*; | ||
| 30 | |||
| 31 | abstract class LValue { | ||
| 32 | |||
| 33 | // The JDI Value object for this LValue. Once we have this Value, | ||
| 34 | // we have to remember it since after we return the LValue object | ||
| 35 | // to the ExpressionParser, it might decide that it needs | ||
| 36 | // the 'toString' value for the LValue in which case it will | ||
| 37 | // call getMassagedValue to get this toString value. At that | ||
| 38 | // point, we don't want to call JDI a 2nd time to get the Value | ||
| 39 | // for the LValue. This is especially wrong when the LValue | ||
| 40 | // represents a member function. We would end up calling it | ||
| 41 | // a 2nd time. | ||
| 42 | // | ||
| 43 | // Unfortunately, there are several levels of calls to | ||
| 44 | // get/set values in this file. To minimize confusion, | ||
| 45 | // jdiValue is set/tested at the lowest level - right | ||
| 46 | // next to the actual calls to JDI methods to get/set the | ||
| 47 | // value in the debuggee. | ||
| 48 | protected Value jdiValue; | ||
| 49 | |||
| 50 | abstract Value getValue() throws InvocationException, | ||
| 51 | IncompatibleThreadStateException, | ||
| 52 | InvalidTypeException, | ||
| 53 | ClassNotLoadedException, | ||
| 54 | ParseException; | ||
| 55 | |||
| 56 | abstract void setValue0(Value value) | ||
| 57 | throws ParseException, InvalidTypeException, | ||
| 58 | ClassNotLoadedException; | ||
| 59 | |||
| 60 | abstract void invokeWith(List<Value> arguments) throws ParseException; | ||
| 61 | |||
| 62 | void setValue(Value value) throws ParseException { | ||
| 63 | try { | ||
| 64 | setValue0(value); | ||
| 65 | } catch (InvalidTypeException exc) { | ||
| 66 | throw new ParseException( | ||
| 67 | "Attempt to set value of incorrect type" + | ||
| 68 | exc); | ||
| 69 | } catch (ClassNotLoadedException exc) { | ||
| 70 | throw new ParseException( | ||
| 71 | "Attempt to set value before " + exc.className() + " was loaded" + | ||
| 72 | exc); | ||
| 73 | } | ||
| 74 | } | ||
| 75 | |||
| 76 | void setValue(LValue lval) throws ParseException { | ||
| 77 | setValue(lval.interiorGetValue()); | ||
| 78 | } | ||
| 79 | |||
| 80 | LValue memberLValue(ExpressionParser.GetFrame frameGetter, | ||
| 81 | String fieldName) throws ParseException { | ||
| 82 | try { | ||
| 83 | return memberLValue(fieldName, frameGetter.get().thread()); | ||
| 84 | } catch (IncompatibleThreadStateException exc) { | ||
| 85 | throw new ParseException("Thread not suspended"); | ||
| 86 | } | ||
| 87 | } | ||
| 88 | |||
| 89 | LValue memberLValue(String fieldName, ThreadReference thread) throws ParseException { | ||
| 90 | |||
| 91 | Value val = interiorGetValue(); | ||
| 92 | if ((val instanceof ArrayReference) && | ||
| 93 | "length".equals(fieldName)){ | ||
| 94 | return new LValueArrayLength((ArrayReference)val); | ||
| 95 | } | ||
| 96 | return new LValueInstanceMember(val, fieldName, thread); | ||
| 97 | } | ||
| 98 | |||
| 99 | // Return the Value for this LValue that would be used to concatenate | ||
| 100 | // to a String. IE, if it is an Object, call toString in the debuggee. | ||
| 101 | Value getMassagedValue(ExpressionParser.GetFrame frameGetter) throws ParseException { | ||
| 102 | Value vv = interiorGetValue(); | ||
| 103 | |||
| 104 | // If vv is an ObjectReference, then we have to | ||
| 105 | // do the implicit call to toString(). | ||
| 106 | if (vv instanceof ObjectReference && | ||
| 107 | !(vv instanceof StringReference) && | ||
| 108 | !(vv instanceof ArrayReference)) { | ||
| 109 | StackFrame frame; | ||
| 110 | try { | ||
| 111 | frame = frameGetter.get(); | ||
| 112 | } catch (IncompatibleThreadStateException exc) { | ||
| 113 | throw new ParseException("Thread not suspended"); | ||
| 114 | } | ||
| 115 | |||
| 116 | ThreadReference thread = frame.thread(); | ||
| 117 | LValue toStringMember = memberLValue("toString", thread); | ||
| 118 | toStringMember.invokeWith(new ArrayList<Value>()); | ||
| 119 | return toStringMember.interiorGetValue(); | ||
| 120 | } | ||
| 121 | return vv; | ||
| 122 | } | ||
| 123 | |||
| 124 | Value interiorGetValue() throws ParseException { | ||
| 125 | Value value; | ||
| 126 | try { | ||
| 127 | value = getValue(); | ||
| 128 | } catch (InvocationException e) { | ||
| 129 | throw new ParseException("Unable to complete expression. Exception " + | ||
| 130 | e.exception() + " thrown"); | ||
| 131 | } catch (IncompatibleThreadStateException itse) { | ||
| 132 | throw new ParseException("Unable to complete expression. Thread " + | ||
| 133 | "not suspended for method invoke"); | ||
| 134 | } catch (InvalidTypeException ite) { | ||
| 135 | throw new ParseException("Unable to complete expression. Method " + | ||
| 136 | "argument type mismatch"); | ||
| 137 | } catch (ClassNotLoadedException tnle) { | ||
| 138 | throw new ParseException("Unable to complete expression. Method " + | ||
| 139 | "argument type " + tnle.className() + | ||
| 140 | " not yet loaded"); | ||
| 141 | } | ||
| 142 | return value; | ||
| 143 | } | ||
| 144 | |||
| 145 | LValue arrayElementLValue(LValue lval) throws ParseException { | ||
| 146 | Value indexValue = lval.interiorGetValue(); | ||
| 147 | int index; | ||
| 148 | if ( (indexValue instanceof IntegerValue) || | ||
| 149 | (indexValue instanceof ShortValue) || | ||
| 150 | (indexValue instanceof ByteValue) || | ||
| 151 | (indexValue instanceof CharValue) ) { | ||
| 152 | index = ((PrimitiveValue)indexValue).intValue(); | ||
| 153 | } else { | ||
| 154 | throw new ParseException("Array index must be a integer type"); | ||
| 155 | } | ||
| 156 | return new LValueArrayElement(interiorGetValue(), index); | ||
| 157 | } | ||
| 158 | |||
| 159 | @Override | ||
| 160 | public String toString() { | ||
| 161 | try { | ||
| 162 | return interiorGetValue().toString(); | ||
| 163 | } catch (ParseException e) { | ||
| 164 | return "<Parse Exception>"; | ||
| 165 | } | ||
| 166 | } | ||
| 167 | |||
| 168 | static final int STATIC = 0; | ||
| 169 | static final int INSTANCE = 1; | ||
| 170 | |||
| 171 | static Field fieldByName(ReferenceType refType, String name, int kind) { | ||
| 172 | /* | ||
| 173 | * TO DO: Note that this currently fails to find superclass | ||
| 174 | * or implemented interface fields. This is due to a temporary | ||
| 175 | * limititation of RefType.fieldByName. Once that method is | ||
| 176 | * fixed, superclass fields will be found. | ||
| 177 | */ | ||
| 178 | Field field = refType.fieldByName(name); | ||
| 179 | if (field != null) { | ||
| 180 | boolean isStatic = field.isStatic(); | ||
| 181 | if (((kind == STATIC) && !isStatic) || | ||
| 182 | ((kind == INSTANCE) && isStatic)) { | ||
| 183 | field = null; | ||
| 184 | } | ||
| 185 | } | ||
| 186 | /*** | ||
| 187 | System.err.println("fieldByName: " + refType.name() + " " + | ||
| 188 | name + " " + | ||
| 189 | kind + " " + | ||
| 190 | (field != null)); | ||
| 191 | ***/ | ||
| 192 | return field; | ||
| 193 | } | ||
| 194 | |||
| 195 | static List<Method> methodsByName(ReferenceType refType, | ||
| 196 | String name, int kind) { | ||
| 197 | List<Method> list = refType.methodsByName(name); | ||
| 198 | Iterator<Method> iter = list.iterator(); | ||
| 199 | while (iter.hasNext()) { | ||
| 200 | Method method = iter.next(); | ||
| 201 | boolean isStatic = method.isStatic(); | ||
| 202 | if (((kind == STATIC) && !isStatic) || | ||
| 203 | ((kind == INSTANCE) && isStatic)) { | ||
| 204 | iter.remove(); | ||
| 205 | } | ||
| 206 | } | ||
| 207 | return list; | ||
| 208 | } | ||
| 209 | |||
| 210 | static List<String> primitiveTypeNames = new ArrayList<String>(); | ||
| 211 | static { | ||
| 212 | primitiveTypeNames.add("boolean"); | ||
| 213 | primitiveTypeNames.add("byte"); | ||
| 214 | primitiveTypeNames.add("char"); | ||
| 215 | primitiveTypeNames.add("short"); | ||
| 216 | primitiveTypeNames.add("int"); | ||
| 217 | primitiveTypeNames.add("long"); | ||
| 218 | primitiveTypeNames.add("float"); | ||
| 219 | primitiveTypeNames.add("double"); | ||
| 220 | } | ||
| 221 | |||
| 222 | |||
| 223 | static final int SAME = 0; | ||
| 224 | static final int ASSIGNABLE = 1; | ||
| 225 | static final int DIFFERENT = 2; | ||
| 226 | /* | ||
| 227 | * Return SAME, DIFFERENT or ASSIGNABLE. | ||
| 228 | * SAME means each arg type is the same as type of the corr. arg. | ||
| 229 | * ASSIGNABLE means that not all the pairs are the same, but | ||
| 230 | * for those that aren't, at least the argType is assignable | ||
| 231 | * from the type of the argument value. | ||
| 232 | * DIFFERENT means that in at least one pair, the | ||
| 233 | * argType is not assignable from the type of the argument value. | ||
| 234 | * IE, one is an Apple and the other is an Orange. | ||
| 235 | */ | ||
| 236 | static int argumentsMatch(List<Type> argTypes, List<Value> arguments) { | ||
| 237 | if (argTypes.size() != arguments.size()) { | ||
| 238 | return DIFFERENT; | ||
| 239 | } | ||
| 240 | |||
| 241 | Iterator<Type> typeIter = argTypes.iterator(); | ||
| 242 | Iterator<Value> valIter = arguments.iterator(); | ||
| 243 | int result = SAME; | ||
| 244 | |||
| 245 | // If any pair aren't the same, change the | ||
| 246 | // result to ASSIGNABLE. If any pair aren't | ||
| 247 | // assignable, return DIFFERENT | ||
| 248 | while (typeIter.hasNext()) { | ||
| 249 | Type argType = typeIter.next(); | ||
| 250 | Value value = valIter.next(); | ||
| 251 | if (value == null) { | ||
| 252 | // Null values can be passed to any non-primitive argument | ||
| 253 | if (primitiveTypeNames.contains(argType.name())) { | ||
| 254 | return DIFFERENT; | ||
| 255 | } | ||
| 256 | // Else, we will assume that a null value | ||
| 257 | // exactly matches an object type. | ||
| 258 | } | ||
| 259 | if (!value.type().equals(argType)) { | ||
| 260 | if (isAssignableTo(value.type(), argType)) { | ||
| 261 | result = ASSIGNABLE; | ||
| 262 | } else { | ||
| 263 | return DIFFERENT; | ||
| 264 | } | ||
| 265 | } | ||
| 266 | } | ||
| 267 | return result; | ||
| 268 | } | ||
| 269 | |||
| 270 | |||
| 271 | // These is...AssignableTo methods are based on similar code in the JDI | ||
| 272 | // implementations of ClassType, ArrayType, and InterfaceType | ||
| 273 | |||
| 274 | static boolean isComponentAssignable(Type fromType, Type toType) { | ||
| 275 | if (fromType instanceof PrimitiveType) { | ||
| 276 | // Assignment of primitive arrays requires identical | ||
| 277 | // component types. | ||
| 278 | return fromType.equals(toType); | ||
| 279 | } | ||
| 280 | if (toType instanceof PrimitiveType) { | ||
| 281 | return false; | ||
| 282 | } | ||
| 283 | // Assignment of object arrays requires availability | ||
| 284 | // of widening conversion of component types | ||
| 285 | return isAssignableTo(fromType, toType); | ||
| 286 | } | ||
| 287 | |||
| 288 | static boolean isArrayAssignableTo(ArrayType fromType, Type toType) { | ||
| 289 | if (toType instanceof ArrayType) { | ||
| 290 | try { | ||
| 291 | Type toComponentType = ((ArrayType)toType).componentType(); | ||
| 292 | return isComponentAssignable(fromType.componentType(), toComponentType); | ||
| 293 | } catch (ClassNotLoadedException e) { | ||
| 294 | // One or both component types has not yet been | ||
| 295 | // loaded => can't assign | ||
| 296 | return false; | ||
| 297 | } | ||
| 298 | } | ||
| 299 | if (toType instanceof InterfaceType) { | ||
| 300 | // Only valid InterfaceType assignee is Cloneable | ||
| 301 | return toType.name().equals("java.lang.Cloneable"); | ||
| 302 | } | ||
| 303 | // Only valid ClassType assignee is Object | ||
| 304 | return toType.name().equals("java.lang.Object"); | ||
| 305 | } | ||
| 306 | |||
| 307 | static boolean isAssignableTo(Type fromType, Type toType) { | ||
| 308 | if (fromType.equals(toType)) { | ||
| 309 | return true; | ||
| 310 | } | ||
| 311 | |||
| 312 | // If one is boolean, so must be the other. | ||
| 313 | if (fromType instanceof BooleanType) { | ||
| 314 | if (toType instanceof BooleanType) { | ||
| 315 | return true; | ||
| 316 | } | ||
| 317 | return false; | ||
| 318 | } | ||
| 319 | if (toType instanceof BooleanType) { | ||
| 320 | return false; | ||
| 321 | } | ||
| 322 | |||
| 323 | // Other primitive types are intermixable only with each other. | ||
| 324 | if (fromType instanceof PrimitiveType) { | ||
| 325 | if (toType instanceof PrimitiveType) { | ||
| 326 | return true; | ||
| 327 | } | ||
| 328 | return false; | ||
| 329 | } | ||
| 330 | if (toType instanceof PrimitiveType) { | ||
| 331 | return false; | ||
| 332 | } | ||
| 333 | |||
| 334 | // neither one is primitive. | ||
| 335 | if (fromType instanceof ArrayType) { | ||
| 336 | return isArrayAssignableTo((ArrayType)fromType, toType); | ||
| 337 | } | ||
| 338 | List<InterfaceType> interfaces; | ||
| 339 | if (fromType instanceof ClassType) { | ||
| 340 | ClassType superclazz = ((ClassType)fromType).superclass(); | ||
| 341 | if ((superclazz != null) && isAssignableTo(superclazz, toType)) { | ||
| 342 | return true; | ||
| 343 | } | ||
| 344 | interfaces = ((ClassType)fromType).interfaces(); | ||
| 345 | } else { | ||
| 346 | // fromType must be an InterfaceType | ||
| 347 | interfaces = ((InterfaceType)fromType).superinterfaces(); | ||
| 348 | } | ||
| 349 | for (InterfaceType interfaze : interfaces) { | ||
| 350 | if (isAssignableTo(interfaze, toType)) { | ||
| 351 | return true; | ||
| 352 | } | ||
| 353 | } | ||
| 354 | return false; | ||
| 355 | } | ||
| 356 | |||
| 357 | static Method resolveOverload(List<Method> overloads, | ||
| 358 | List<Value> arguments) | ||
| 359 | throws ParseException { | ||
| 360 | |||
| 361 | // If there is only one method to call, we'll just choose | ||
| 362 | // that without looking at the args. If they aren't right | ||
| 363 | // the invoke will return a better error message than we | ||
| 364 | // could generate here. | ||
| 365 | if (overloads.size() == 1) { | ||
| 366 | return overloads.get(0); | ||
| 367 | } | ||
| 368 | |||
| 369 | // Resolving overloads is beyond the scope of this exercise. | ||
| 370 | // So, we will look for a method that matches exactly the | ||
| 371 | // types of the arguments. If we can't find one, then | ||
| 372 | // if there is exactly one method whose param types are assignable | ||
| 373 | // from the arg types, we will use that. Otherwise, | ||
| 374 | // it is an error. We won't guess which of multiple possible | ||
| 375 | // methods to call. And, since casts aren't implemented, | ||
| 376 | // the user can't use them to pick a particular overload to call. | ||
| 377 | // IE, the user is out of luck in this case. | ||
| 378 | Method retVal = null; | ||
| 379 | int assignableCount = 0; | ||
| 380 | for (Method mm : overloads) { | ||
| 381 | List<Type> argTypes; | ||
| 382 | try { | ||
| 383 | argTypes = mm.argumentTypes(); | ||
| 384 | } catch (ClassNotLoadedException ee) { | ||
| 385 | // This probably won't happen for the | ||
| 386 | // method that we are really supposed to | ||
| 387 | // call. | ||
| 388 | continue; | ||
| 389 | } | ||
| 390 | int compare = argumentsMatch(argTypes, arguments); | ||
| 391 | if (compare == SAME) { | ||
| 392 | return mm; | ||
| 393 | } | ||
| 394 | if (compare == DIFFERENT) { | ||
| 395 | continue; | ||
| 396 | } | ||
| 397 | // Else, it is assignable. Remember it. | ||
| 398 | retVal = mm; | ||
| 399 | assignableCount++; | ||
| 400 | } | ||
| 401 | |||
| 402 | // At this point, we didn't find an exact match, | ||
| 403 | // but we found one for which the args are assignable. | ||
| 404 | // | ||
| 405 | if (retVal != null) { | ||
| 406 | if (assignableCount == 1) { | ||
| 407 | return retVal; | ||
| 408 | } | ||
| 409 | throw new ParseException("Arguments match multiple methods"); | ||
| 410 | } | ||
| 411 | throw new ParseException("Arguments match no method"); | ||
| 412 | } | ||
| 413 | |||
| 414 | private static class LValueLocal extends LValue { | ||
| 415 | final StackFrame frame; | ||
| 416 | final LocalVariable var; | ||
| 417 | |||
| 418 | LValueLocal(StackFrame frame, LocalVariable var) { | ||
| 419 | this.frame = frame; | ||
| 420 | this.var = var; | ||
| 421 | } | ||
| 422 | |||
| 423 | @Override | ||
| 424 | Value getValue() { | ||
| 425 | if (jdiValue == null) { | ||
| 426 | jdiValue = frame.getValue(var); | ||
| 427 | } | ||
| 428 | return jdiValue; | ||
| 429 | } | ||
| 430 | |||
| 431 | @Override | ||
| 432 | void setValue0(Value val) throws InvalidTypeException, | ||
| 433 | ClassNotLoadedException { | ||
| 434 | frame.setValue(var, val); | ||
| 435 | jdiValue = val; | ||
| 436 | } | ||
| 437 | |||
| 438 | @Override | ||
| 439 | void invokeWith(List<Value> arguments) throws ParseException { | ||
| 440 | throw new ParseException(var.name() + " is not a method"); | ||
| 441 | } | ||
| 442 | } | ||
| 443 | |||
| 444 | private static class LValueInstanceMember extends LValue { | ||
| 445 | final ObjectReference obj; | ||
| 446 | final ThreadReference thread; | ||
| 447 | final Field matchingField; | ||
| 448 | final List<Method> overloads; | ||
| 449 | Method matchingMethod = null; | ||
| 450 | List<Value> methodArguments = null; | ||
| 451 | |||
| 452 | LValueInstanceMember(Value value, | ||
| 453 | String memberName, | ||
| 454 | ThreadReference thread) throws ParseException { | ||
| 455 | if (!(value instanceof ObjectReference)) { | ||
| 456 | throw new ParseException( | ||
| 457 | "Cannot access field of primitive type: " + value); | ||
| 458 | } | ||
| 459 | this.obj = (ObjectReference)value; | ||
| 460 | this.thread = thread; | ||
| 461 | ReferenceType refType = obj.referenceType(); | ||
| 462 | /* | ||
| 463 | * Can't tell yet whether this LValue will be accessed as a | ||
| 464 | * field or method, so we keep track of all the possibilities | ||
| 465 | */ | ||
| 466 | matchingField = LValue.fieldByName(refType, memberName, | ||
| 467 | LValue.INSTANCE); | ||
| 468 | overloads = LValue.methodsByName(refType, memberName, | ||
| 469 | LValue.INSTANCE); | ||
| 470 | if ((matchingField == null) && overloads.size() == 0) { | ||
| 471 | throw new ParseException("No instance field or method with the name " | ||
| 472 | + memberName + " in " + refType.name()); | ||
| 473 | } | ||
| 474 | } | ||
| 475 | |||
| 476 | @Override | ||
| 477 | Value getValue() throws InvocationException, InvalidTypeException, | ||
| 478 | ClassNotLoadedException, IncompatibleThreadStateException, | ||
| 479 | ParseException { | ||
| 480 | if (jdiValue != null) { | ||
| 481 | return jdiValue; | ||
| 482 | } | ||
| 483 | if (matchingMethod == null) { | ||
| 484 | if (matchingField == null) { | ||
| 485 | throw new ParseException("No such field in " + obj.referenceType().name()); | ||
| 486 | } | ||
| 487 | return jdiValue = obj.getValue(matchingField); | ||
| 488 | } else { | ||
| 489 | return jdiValue = obj.invokeMethod(thread, matchingMethod, methodArguments, 0); | ||
| 490 | } | ||
| 491 | } | ||
| 492 | |||
| 493 | @Override | ||
| 494 | void setValue0(Value val) throws ParseException, | ||
| 495 | InvalidTypeException, | ||
| 496 | ClassNotLoadedException { | ||
| 497 | if (matchingMethod != null) { | ||
| 498 | throw new ParseException("Cannot assign to a method invocation"); | ||
| 499 | } | ||
| 500 | obj.setValue(matchingField, val); | ||
| 501 | jdiValue = val; | ||
| 502 | } | ||
| 503 | |||
| 504 | @Override | ||
| 505 | void invokeWith(List<Value> arguments) throws ParseException { | ||
| 506 | if (matchingMethod != null) { | ||
| 507 | throw new ParseException("Invalid consecutive invocations"); | ||
| 508 | } | ||
| 509 | methodArguments = arguments; | ||
| 510 | matchingMethod = LValue.resolveOverload(overloads, arguments); | ||
| 511 | } | ||
| 512 | } | ||
| 513 | |||
| 514 | private static class LValueStaticMember extends LValue { | ||
| 515 | final ReferenceType refType; | ||
| 516 | final ThreadReference thread; | ||
| 517 | final Field matchingField; | ||
| 518 | final List<Method> overloads; | ||
| 519 | Method matchingMethod = null; | ||
| 520 | List<Value> methodArguments = null; | ||
| 521 | |||
| 522 | LValueStaticMember(ReferenceType refType, | ||
| 523 | String memberName, | ||
| 524 | ThreadReference thread) throws ParseException { | ||
| 525 | this.refType = refType; | ||
| 526 | this.thread = thread; | ||
| 527 | /* | ||
| 528 | * Can't tell yet whether this LValue will be accessed as a | ||
| 529 | * field or method, so we keep track of all the possibilities | ||
| 530 | */ | ||
| 531 | matchingField = LValue.fieldByName(refType, memberName, | ||
| 532 | LValue.STATIC); | ||
| 533 | overloads = LValue.methodsByName(refType, memberName, | ||
| 534 | LValue.STATIC); | ||
| 535 | if ((matchingField == null) && overloads.size() == 0) { | ||
| 536 | throw new ParseException("No static field or method with the name " | ||
| 537 | + memberName + " in " + refType.name()); | ||
| 538 | } | ||
| 539 | } | ||
| 540 | |||
| 541 | @Override | ||
| 542 | Value getValue() throws InvocationException, InvalidTypeException, | ||
| 543 | ClassNotLoadedException, IncompatibleThreadStateException, | ||
| 544 | ParseException { | ||
| 545 | if (jdiValue != null) { | ||
| 546 | return jdiValue; | ||
| 547 | } | ||
| 548 | if (matchingMethod == null) { | ||
| 549 | return jdiValue = refType.getValue(matchingField); | ||
| 550 | } else if (refType instanceof ClassType) { | ||
| 551 | ClassType clazz = (ClassType)refType; | ||
| 552 | return jdiValue = clazz.invokeMethod(thread, matchingMethod, methodArguments, 0); | ||
| 553 | } else { | ||
| 554 | throw new InvalidTypeException("Cannot invoke static method on " + | ||
| 555 | refType.name()); | ||
| 556 | } | ||
| 557 | } | ||
| 558 | |||
| 559 | @Override | ||
| 560 | void setValue0(Value val) | ||
| 561 | throws ParseException, InvalidTypeException, | ||
| 562 | ClassNotLoadedException { | ||
| 563 | if (matchingMethod != null) { | ||
| 564 | throw new ParseException("Cannot assign to a method invocation"); | ||
| 565 | } | ||
| 566 | if (!(refType instanceof ClassType)) { | ||
| 567 | throw new ParseException( | ||
| 568 | "Cannot set interface field: " + refType); | ||
| 569 | } | ||
| 570 | ((ClassType)refType).setValue(matchingField, val); | ||
| 571 | jdiValue = val; | ||
| 572 | } | ||
| 573 | |||
| 574 | @Override | ||
| 575 | void invokeWith(List<Value> arguments) throws ParseException { | ||
| 576 | if (matchingMethod != null) { | ||
| 577 | throw new ParseException("Invalid consecutive invocations"); | ||
| 578 | } | ||
| 579 | methodArguments = arguments; | ||
| 580 | matchingMethod = LValue.resolveOverload(overloads, arguments); | ||
| 581 | } | ||
| 582 | } | ||
| 583 | |||
| 584 | private static class LValueArrayLength extends LValue { | ||
| 585 | /* | ||
| 586 | * Since one can code "int myLen = myArray.length;", | ||
| 587 | * one might expect that these JDI calls would get a Value | ||
| 588 | * object for the length of an array in the debugee: | ||
| 589 | * Field xxx = ArrayType.fieldByName("length") | ||
| 590 | * Value lenVal= ArrayReference.getValue(xxx) | ||
| 591 | * | ||
| 592 | * However, this doesn't work because the array length isn't | ||
| 593 | * really stored as a field, and can't be accessed as such | ||
| 594 | * via JDI. Instead, the arrayRef.length() method has to be | ||
| 595 | * used. | ||
| 596 | */ | ||
| 597 | final ArrayReference arrayRef; | ||
| 598 | LValueArrayLength (ArrayReference value) { | ||
| 599 | this.arrayRef = value; | ||
| 600 | } | ||
| 601 | |||
| 602 | @Override | ||
| 603 | Value getValue() { | ||
| 604 | if (jdiValue == null) { | ||
| 605 | jdiValue = arrayRef.virtualMachine().mirrorOf(arrayRef.length()); | ||
| 606 | } | ||
| 607 | return jdiValue; | ||
| 608 | } | ||
| 609 | |||
| 610 | @Override | ||
| 611 | void setValue0(Value value) throws ParseException { | ||
| 612 | throw new ParseException("Cannot set constant: " + value); | ||
| 613 | } | ||
| 614 | |||
| 615 | @Override | ||
| 616 | void invokeWith(List<Value> arguments) throws ParseException { | ||
| 617 | throw new ParseException("Array element is not a method"); | ||
| 618 | } | ||
| 619 | } | ||
| 620 | |||
| 621 | private static class LValueArrayElement extends LValue { | ||
| 622 | final ArrayReference array; | ||
| 623 | final int index; | ||
| 624 | |||
| 625 | LValueArrayElement(Value value, int index) throws ParseException { | ||
| 626 | if (!(value instanceof ArrayReference)) { | ||
| 627 | throw new ParseException( | ||
| 628 | "Must be array type: " + value); | ||
| 629 | } | ||
| 630 | this.array = (ArrayReference)value; | ||
| 631 | this.index = index; | ||
| 632 | } | ||
| 633 | |||
| 634 | @Override | ||
| 635 | Value getValue() { | ||
| 636 | if (jdiValue == null) { | ||
| 637 | jdiValue = array.getValue(index); | ||
| 638 | } | ||
| 639 | return jdiValue; | ||
| 640 | } | ||
| 641 | |||
| 642 | @Override | ||
| 643 | void setValue0(Value val) throws InvalidTypeException, | ||
| 644 | ClassNotLoadedException { | ||
| 645 | array.setValue(index, val); | ||
| 646 | jdiValue = val; | ||
| 647 | } | ||
| 648 | |||
| 649 | @Override | ||
| 650 | void invokeWith(List<Value> arguments) throws ParseException { | ||
| 651 | throw new ParseException("Array element is not a method"); | ||
| 652 | } | ||
| 653 | } | ||
| 654 | |||
| 655 | private static class LValueConstant extends LValue { | ||
| 656 | final Value value; | ||
| 657 | |||
| 658 | LValueConstant(Value value) { | ||
| 659 | this.value = value; | ||
| 660 | } | ||
| 661 | |||
| 662 | @Override | ||
| 663 | Value getValue() { | ||
| 664 | if (jdiValue == null) { | ||
| 665 | jdiValue = value; | ||
| 666 | } | ||
| 667 | return jdiValue; | ||
| 668 | } | ||
| 669 | |||
| 670 | @Override | ||
| 671 | void setValue0(Value val) throws ParseException { | ||
| 672 | throw new ParseException("Cannot set constant: " + value); | ||
| 673 | } | ||
| 674 | |||
| 675 | @Override | ||
| 676 | void invokeWith(List<Value> arguments) throws ParseException { | ||
| 677 | throw new ParseException("Constant is not a method"); | ||
| 678 | } | ||
| 679 | } | ||
| 680 | |||
| 681 | static LValue make(VirtualMachine vm, boolean val) { | ||
| 682 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 683 | } | ||
| 684 | |||
| 685 | static LValue make(VirtualMachine vm, byte val) { | ||
| 686 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 687 | } | ||
| 688 | |||
| 689 | static LValue make(VirtualMachine vm, char val) { | ||
| 690 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 691 | } | ||
| 692 | |||
| 693 | static LValue make(VirtualMachine vm, short val) { | ||
| 694 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 695 | } | ||
| 696 | |||
| 697 | static LValue make(VirtualMachine vm, int val) { | ||
| 698 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 699 | } | ||
| 700 | |||
| 701 | static LValue make(VirtualMachine vm, long val) { | ||
| 702 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 703 | } | ||
| 704 | |||
| 705 | static LValue make(VirtualMachine vm, float val) { | ||
| 706 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 707 | } | ||
| 708 | |||
| 709 | static LValue make(VirtualMachine vm, double val) { | ||
| 710 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 711 | } | ||
| 712 | |||
| 713 | static LValue make(VirtualMachine vm, String val) throws ParseException { | ||
| 714 | return new LValueConstant(vm.mirrorOf(val)); | ||
| 715 | } | ||
| 716 | |||
| 717 | static LValue makeBoolean(VirtualMachine vm, Token token) { | ||
| 718 | return make(vm, token.image.charAt(0) == 't'); | ||
| 719 | } | ||
| 720 | |||
| 721 | static LValue makeCharacter(VirtualMachine vm, Token token) { | ||
| 722 | return make(vm, token.image.charAt(1)); | ||
| 723 | } | ||
| 724 | |||
| 725 | static LValue makeFloat(VirtualMachine vm, Token token) { | ||
| 726 | return make(vm, Float.valueOf(token.image).floatValue()); | ||
| 727 | } | ||
| 728 | |||
| 729 | static LValue makeDouble(VirtualMachine vm, Token token) { | ||
| 730 | return make(vm, Double.valueOf(token.image).doubleValue()); | ||
| 731 | } | ||
| 732 | |||
| 733 | static LValue makeInteger(VirtualMachine vm, Token token) { | ||
| 734 | return make(vm, Integer.parseInt(token.image)); | ||
| 735 | } | ||
| 736 | |||
| 737 | static LValue makeShort(VirtualMachine vm, Token token) { | ||
| 738 | return make(vm, Short.parseShort(token.image)); | ||
| 739 | } | ||
| 740 | |||
| 741 | static LValue makeLong(VirtualMachine vm, Token token) { | ||
| 742 | return make(vm, Long.parseLong(token.image)); | ||
| 743 | } | ||
| 744 | |||
| 745 | static LValue makeByte(VirtualMachine vm, Token token) { | ||
| 746 | return make(vm, Byte.parseByte(token.image)); | ||
| 747 | } | ||
| 748 | |||
| 749 | static LValue makeString(VirtualMachine vm, | ||
| 750 | Token token) throws ParseException { | ||
| 751 | int len = token.image.length(); | ||
| 752 | return make(vm, token.image.substring(1,len-1)); | ||
| 753 | } | ||
| 754 | |||
| 755 | static LValue makeNull(VirtualMachine vm, | ||
| 756 | Token token) throws ParseException { | ||
| 757 | return new LValueConstant(null); | ||
| 758 | } | ||
| 759 | |||
| 760 | static LValue makeThisObject(VirtualMachine vm, | ||
| 761 | ExpressionParser.GetFrame frameGetter, | ||
| 762 | Token token) throws ParseException { | ||
| 763 | if (frameGetter == null) { | ||
| 764 | throw new ParseException("No current thread"); | ||
| 765 | } else { | ||
| 766 | try { | ||
| 767 | StackFrame frame = frameGetter.get(); | ||
| 768 | ObjectReference thisObject = frame.thisObject(); | ||
| 769 | |||
| 770 | if (thisObject==null) { | ||
| 771 | throw new ParseException( | ||
| 772 | "No 'this'. In native or static method"); | ||
| 773 | } else { | ||
| 774 | return new LValueConstant(thisObject); | ||
| 775 | } | ||
| 776 | } catch (IncompatibleThreadStateException exc) { | ||
| 777 | throw new ParseException("Thread not suspended"); | ||
| 778 | } | ||
| 779 | } | ||
| 780 | } | ||
| 781 | |||
| 782 | static LValue makeNewObject(VirtualMachine vm, | ||
| 783 | ExpressionParser.GetFrame frameGetter, | ||
| 784 | String className, List<Value> arguments) throws ParseException { | ||
| 785 | List<ReferenceType> classes = vm.classesByName(className); | ||
| 786 | if (classes.size() == 0) { | ||
| 787 | throw new ParseException("No class named: " + className); | ||
| 788 | } | ||
| 789 | |||
| 790 | if (classes.size() > 1) { | ||
| 791 | throw new ParseException("More than one class named: " + | ||
| 792 | className); | ||
| 793 | } | ||
| 794 | ReferenceType refType = classes.get(0); | ||
| 795 | |||
| 796 | |||
| 797 | if (!(refType instanceof ClassType)) { | ||
| 798 | throw new ParseException("Cannot create instance of interface " + | ||
| 799 | className); | ||
| 800 | } | ||
| 801 | |||
| 802 | ClassType classType = (ClassType)refType; | ||
| 803 | List<Method> methods = new ArrayList<Method>(classType.methods()); // writable | ||
| 804 | Iterator<Method> iter = methods.iterator(); | ||
| 805 | while (iter.hasNext()) { | ||
| 806 | Method method = iter.next(); | ||
| 807 | if (!method.isConstructor()) { | ||
| 808 | iter.remove(); | ||
| 809 | } | ||
| 810 | } | ||
| 811 | Method constructor = LValue.resolveOverload(methods, arguments); | ||
| 812 | |||
| 813 | ObjectReference newObject; | ||
| 814 | try { | ||
| 815 | ThreadReference thread = frameGetter.get().thread(); | ||
| 816 | newObject = classType.newInstance(thread, constructor, arguments, 0); | ||
| 817 | } catch (InvocationException ie) { | ||
| 818 | throw new ParseException("Exception in " + className + " constructor: " + | ||
| 819 | ie.exception().referenceType().name()); | ||
| 820 | } catch (IncompatibleThreadStateException exc) { | ||
| 821 | throw new ParseException("Thread not suspended"); | ||
| 822 | } catch (Exception e) { | ||
| 823 | /* | ||
| 824 | * TO DO: Better error handling | ||
| 825 | */ | ||
| 826 | throw new ParseException("Unable to create " + className + " instance"); | ||
| 827 | } | ||
| 828 | return new LValueConstant(newObject); | ||
| 829 | } | ||
| 830 | |||
| 831 | private static LValue nFields(LValue lval, | ||
| 832 | StringTokenizer izer, | ||
| 833 | ThreadReference thread) | ||
| 834 | throws ParseException { | ||
| 835 | if (!izer.hasMoreTokens()) { | ||
| 836 | return lval; | ||
| 837 | } else { | ||
| 838 | return nFields(lval.memberLValue(izer.nextToken(), thread), izer, thread); | ||
| 839 | } | ||
| 840 | } | ||
| 841 | |||
| 842 | static LValue makeName(VirtualMachine vm, | ||
| 843 | ExpressionParser.GetFrame frameGetter, | ||
| 844 | String name) throws ParseException { | ||
| 845 | StringTokenizer izer = new StringTokenizer(name, "."); | ||
| 846 | String first = izer.nextToken(); | ||
| 847 | // check local variables | ||
| 848 | if (frameGetter != null) { | ||
| 849 | try { | ||
| 850 | StackFrame frame = frameGetter.get(); | ||
| 851 | ThreadReference thread = frame.thread(); | ||
| 852 | LocalVariable var; | ||
| 853 | try { | ||
| 854 | var = frame.visibleVariableByName(first); | ||
| 855 | } catch (AbsentInformationException e) { | ||
| 856 | var = null; | ||
| 857 | } | ||
| 858 | if (var != null) { | ||
| 859 | return nFields(new LValueLocal(frame, var), izer, thread); | ||
| 860 | } else { | ||
| 861 | ObjectReference thisObject = frame.thisObject(); | ||
| 862 | if (thisObject != null) { | ||
| 863 | // check if it is a field of 'this' | ||
| 864 | LValue thisLValue = new LValueConstant(thisObject); | ||
| 865 | LValue fv; | ||
| 866 | try { | ||
| 867 | fv = thisLValue.memberLValue(first, thread); | ||
| 868 | } catch (ParseException exc) { | ||
| 869 | fv = null; | ||
| 870 | } | ||
| 871 | if (fv != null) { | ||
| 872 | return nFields(fv, izer, thread); | ||
| 873 | } | ||
| 874 | } | ||
| 875 | } | ||
| 876 | // check for class name | ||
| 877 | while (izer.hasMoreTokens()) { | ||
| 878 | List<ReferenceType> classes = vm.classesByName(first); | ||
| 879 | if (classes.size() > 0) { | ||
| 880 | if (classes.size() > 1) { | ||
| 881 | throw new ParseException("More than one class named: " + | ||
| 882 | first); | ||
| 883 | } else { | ||
| 884 | ReferenceType refType = classes.get(0); | ||
| 885 | LValue lval = new LValueStaticMember(refType, | ||
| 886 | izer.nextToken(), thread); | ||
| 887 | return nFields(lval, izer, thread); | ||
| 888 | } | ||
| 889 | } | ||
| 890 | first = first + '.' + izer.nextToken(); | ||
| 891 | } | ||
| 892 | } catch (IncompatibleThreadStateException exc) { | ||
| 893 | throw new ParseException("Thread not suspended"); | ||
| 894 | } | ||
| 895 | } | ||
| 896 | throw new ParseException("Name unknown: " + name); | ||
| 897 | } | ||
| 898 | |||
| 899 | static String stringValue(LValue lval, ExpressionParser.GetFrame frameGetter | ||
| 900 | ) throws ParseException { | ||
| 901 | Value val = lval.getMassagedValue(frameGetter); | ||
| 902 | if (val == null) { | ||
| 903 | return "null"; | ||
| 904 | } | ||
| 905 | if (val instanceof StringReference) { | ||
| 906 | return ((StringReference)val).value(); | ||
| 907 | } | ||
| 908 | return val.toString(); // is this correct in all cases? | ||
| 909 | } | ||
| 910 | |||
| 911 | static LValue booleanOperation(VirtualMachine vm, Token token, | ||
| 912 | LValue rightL, | ||
| 913 | LValue leftL) throws ParseException { | ||
| 914 | String op = token.image; | ||
| 915 | Value right = rightL.interiorGetValue(); | ||
| 916 | Value left = leftL.interiorGetValue(); | ||
| 917 | if ( !(right instanceof PrimitiveValue) || | ||
| 918 | !(left instanceof PrimitiveValue) ) { | ||
| 919 | if (op.equals("==")) { | ||
| 920 | return make(vm, right.equals(left)); | ||
| 921 | } else if (op.equals("!=")) { | ||
| 922 | return make(vm, !right.equals(left)); | ||
| 923 | } else { | ||
| 924 | throw new ParseException("Operands or '" + op + | ||
| 925 | "' must be primitive"); | ||
| 926 | } | ||
| 927 | } | ||
| 928 | // can compare any numeric doubles | ||
| 929 | double rr = ((PrimitiveValue)right).doubleValue(); | ||
| 930 | double ll = ((PrimitiveValue)left).doubleValue(); | ||
| 931 | boolean res; | ||
| 932 | if (op.equals("<")) { | ||
| 933 | res = rr < ll; | ||
| 934 | } else if (op.equals(">")) { | ||
| 935 | res = rr > ll; | ||
| 936 | } else if (op.equals("<=")) { | ||
| 937 | res = rr <= ll; | ||
| 938 | } else if (op.equals(">=")) { | ||
| 939 | res = rr >= ll; | ||
| 940 | } else if (op.equals("==")) { | ||
| 941 | res = rr == ll; | ||
| 942 | } else if (op.equals("!=")) { | ||
| 943 | res = rr != ll; | ||
| 944 | } else { | ||
| 945 | throw new ParseException("Unknown operation: " + op); | ||
| 946 | } | ||
| 947 | return make(vm, res); | ||
| 948 | } | ||
| 949 | |||
| 950 | static LValue operation(VirtualMachine vm, Token token, | ||
| 951 | LValue rightL, LValue leftL, | ||
| 952 | ExpressionParser.GetFrame frameGetter | ||
| 953 | ) throws ParseException { | ||
| 954 | String op = token.image; | ||
| 955 | Value right = rightL.interiorGetValue(); | ||
| 956 | Value left = leftL.interiorGetValue(); | ||
| 957 | if ((right instanceof StringReference) || | ||
| 958 | (left instanceof StringReference)) { | ||
| 959 | if (op.equals("+")) { | ||
| 960 | // If one is an ObjectRef, we will need to invoke | ||
| 961 | // toString on it, so we need the thread. | ||
| 962 | return make(vm, stringValue(rightL, frameGetter) + | ||
| 963 | stringValue(leftL, frameGetter)); | ||
| 964 | } | ||
| 965 | } | ||
| 966 | if ((right instanceof ObjectReference) || | ||
| 967 | (left instanceof ObjectReference)) { | ||
| 968 | if (op.equals("==")) { | ||
| 969 | return make(vm, right.equals(left)); | ||
| 970 | } else if (op.equals("!=")) { | ||
| 971 | return make(vm, !right.equals(left)); | ||
| 972 | } else { | ||
| 973 | throw new ParseException("Invalid operation '" + | ||
| 974 | op + "' on an Object"); | ||
| 975 | } | ||
| 976 | } | ||
| 977 | if ((right instanceof BooleanValue) || | ||
| 978 | (left instanceof BooleanValue)) { | ||
| 979 | throw new ParseException("Invalid operation '" + | ||
| 980 | op + "' on a Boolean"); | ||
| 981 | } | ||
| 982 | // from here on, we know it is a integer kind of type | ||
| 983 | PrimitiveValue primRight = (PrimitiveValue)right; | ||
| 984 | PrimitiveValue primLeft = (PrimitiveValue)left; | ||
| 985 | if ((primRight instanceof DoubleValue) || | ||
| 986 | (primLeft instanceof DoubleValue)) { | ||
| 987 | double rr = primRight.doubleValue(); | ||
| 988 | double ll = primLeft.doubleValue(); | ||
| 989 | double res; | ||
| 990 | if (op.equals("+")) { | ||
| 991 | res = rr + ll; | ||
| 992 | } else if (op.equals("-")) { | ||
| 993 | res = rr - ll; | ||
| 994 | } else if (op.equals("*")) { | ||
| 995 | res = rr * ll; | ||
| 996 | } else if (op.equals("/")) { | ||
| 997 | res = rr / ll; | ||
| 998 | } else { | ||
| 999 | throw new ParseException("Unknown operation: " + op); | ||
| 1000 | } | ||
| 1001 | return make(vm, res); | ||
| 1002 | } | ||
| 1003 | if ((primRight instanceof FloatValue) || | ||
| 1004 | (primLeft instanceof FloatValue)) { | ||
| 1005 | float rr = primRight.floatValue(); | ||
| 1006 | float ll = primLeft.floatValue(); | ||
| 1007 | float res; | ||
| 1008 | if (op.equals("+")) { | ||
| 1009 | res = rr + ll; | ||
| 1010 | } else if (op.equals("-")) { | ||
| 1011 | res = rr - ll; | ||
| 1012 | } else if (op.equals("*")) { | ||
| 1013 | res = rr * ll; | ||
| 1014 | } else if (op.equals("/")) { | ||
| 1015 | res = rr / ll; | ||
| 1016 | } else { | ||
| 1017 | throw new ParseException("Unknown operation: " + op); | ||
| 1018 | } | ||
| 1019 | return make(vm, res); | ||
| 1020 | } | ||
| 1021 | if ((primRight instanceof LongValue) || | ||
| 1022 | (primLeft instanceof LongValue)) { | ||
| 1023 | long rr = primRight.longValue(); | ||
| 1024 | long ll = primLeft.longValue(); | ||
| 1025 | long res; | ||
| 1026 | if (op.equals("+")) { | ||
| 1027 | res = rr + ll; | ||
| 1028 | } else if (op.equals("-")) { | ||
| 1029 | res = rr - ll; | ||
| 1030 | } else if (op.equals("*")) { | ||
| 1031 | res = rr * ll; | ||
| 1032 | } else if (op.equals("/")) { | ||
| 1033 | res = rr / ll; | ||
| 1034 | } else { | ||
| 1035 | throw new ParseException("Unknown operation: " + op); | ||
| 1036 | } | ||
| 1037 | return make(vm, res); | ||
| 1038 | } else { | ||
| 1039 | int rr = primRight.intValue(); | ||
| 1040 | int ll = primLeft.intValue(); | ||
| 1041 | int res; | ||
| 1042 | if (op.equals("+")) { | ||
| 1043 | res = rr + ll; | ||
| 1044 | } else if (op.equals("-")) { | ||
| 1045 | res = rr - ll; | ||
| 1046 | } else if (op.equals("*")) { | ||
| 1047 | res = rr * ll; | ||
| 1048 | } else if (op.equals("/")) { | ||
| 1049 | res = rr / ll; | ||
| 1050 | } else { | ||
| 1051 | throw new ParseException("Unknown operation: " + op); | ||
| 1052 | } | ||
| 1053 | return make(vm, res); | ||
| 1054 | } | ||
| 1055 | } | ||
| 1056 | } | ||