1 /* 2 * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.runtime; 27 28 import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup; 29 import static jdk.nashorn.internal.codegen.CompilerConstants.virtualCall; 30 import static jdk.nashorn.internal.codegen.CompilerConstants.virtualCallNoLookup; 31 import static jdk.nashorn.internal.lookup.Lookup.MH; 32 import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError; 33 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; 34 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_DOUBLE; 35 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_INT; 36 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_LONG; 37 import static jdk.nashorn.internal.runtime.PropertyDescriptor.CONFIGURABLE; 38 import static jdk.nashorn.internal.runtime.PropertyDescriptor.ENUMERABLE; 39 import static jdk.nashorn.internal.runtime.PropertyDescriptor.GET; 40 import static jdk.nashorn.internal.runtime.PropertyDescriptor.SET; 41 import static jdk.nashorn.internal.runtime.PropertyDescriptor.VALUE; 42 import static jdk.nashorn.internal.runtime.PropertyDescriptor.WRITABLE; 43 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED; 44 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT; 45 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.isValid; 46 import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.getArrayIndex; 47 import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.isValidArrayIndex; 48 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.isScopeFlag; 49 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.isStrictFlag; 50 import static jdk.nashorn.internal.runtime.linker.NashornGuards.explicitInstanceOfCheck; 51 52 import java.lang.invoke.MethodHandle; 53 import java.lang.invoke.MethodHandles; 54 import java.lang.invoke.MethodType; 55 import java.lang.invoke.SwitchPoint; 56 import java.util.AbstractMap; 57 import java.util.ArrayList; 58 import java.util.Arrays; 59 import java.util.Collection; 60 import java.util.Collections; 61 import java.util.HashSet; 62 import java.util.Iterator; 63 import java.util.LinkedHashSet; 64 import java.util.List; 65 import java.util.Map; 66 import java.util.Set; 67 import jdk.internal.dynalink.CallSiteDescriptor; 68 import jdk.internal.dynalink.linker.GuardedInvocation; 69 import jdk.internal.dynalink.linker.LinkRequest; 70 import jdk.internal.dynalink.support.CallSiteDescriptorFactory; 71 import jdk.nashorn.internal.codegen.CompilerConstants.Call; 72 import jdk.nashorn.internal.codegen.ObjectClassGenerator; 73 import jdk.nashorn.internal.codegen.types.Type; 74 import jdk.nashorn.internal.lookup.Lookup; 75 import jdk.nashorn.internal.objects.AccessorPropertyDescriptor; 76 import jdk.nashorn.internal.objects.DataPropertyDescriptor; 77 import jdk.nashorn.internal.objects.Global; 78 import jdk.nashorn.internal.objects.NativeArray; 79 import jdk.nashorn.internal.runtime.arrays.ArrayData; 80 import jdk.nashorn.internal.runtime.arrays.ArrayIndex; 81 import jdk.nashorn.internal.runtime.linker.Bootstrap; 82 import jdk.nashorn.internal.runtime.linker.LinkerCallSite; 83 import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor; 84 import jdk.nashorn.internal.runtime.linker.NashornGuards; 85 86 /** 87 * Base class for generic JavaScript objects. 88 * <p> 89 * Notes: 90 * <ul> 91 * <li>The map is used to identify properties in the object.</li> 92 * <li>If the map is modified then it must be cloned and replaced. This notifies 93 * any code that made assumptions about the object that things have changed. 94 * Ex. CallSites that have been validated must check to see if the map has 95 * changed (or a map from a different object type) and hence relink the method 96 * to call.</li> 97 * <li>Modifications of the map include adding/deleting attributes or changing a 98 * function field value.</li> 99 * </ul> 100 */ 101 102 public abstract class ScriptObject implements PropertyAccess, Cloneable { 103 /** __proto__ special property name inside object literals. ES6 draft. */ 104 public static final String PROTO_PROPERTY_NAME = "__proto__"; 105 106 /** Search fall back routine name for "no such method" */ 107 public static final String NO_SUCH_METHOD_NAME = "__noSuchMethod__"; 108 109 /** Search fall back routine name for "no such property" */ 110 public static final String NO_SUCH_PROPERTY_NAME = "__noSuchProperty__"; 111 112 /** Per ScriptObject flag - is this an array object? */ 113 public static final int IS_ARRAY = 1 << 0; 114 115 /** Per ScriptObject flag - is this an arguments object? */ 116 public static final int IS_ARGUMENTS = 1 << 1; 117 118 /** Is length property not-writable? */ 119 public static final int IS_LENGTH_NOT_WRITABLE = 1 << 2; 120 121 /** Is this a builtin object? */ 122 public static final int IS_BUILTIN = 1 << 3; 123 124 /** 125 * Spill growth rate - by how many elements does {@link ScriptObject#primitiveSpill} and 126 * {@link ScriptObject#objectSpill} when full 127 */ 128 public static final int SPILL_RATE = 8; 129 130 /** Map to property information and accessor functions. Ordered by insertion. */ 131 private PropertyMap map; 132 133 /** objects proto. */ 134 private ScriptObject proto; 135 136 /** Object flags. */ 137 private int flags; 138 139 /** Area for primitive properties added to object after instantiation, see {@link AccessorProperty} */ 140 protected long[] primitiveSpill; 141 142 /** Area for reference properties added to object after instantiation, see {@link AccessorProperty} */ 143 protected Object[] objectSpill; 144 145 /** Indexed array data. */ 146 private ArrayData arrayData; 147 148 /** Method handle to retrieve prototype of this object */ 149 public static final MethodHandle GETPROTO = findOwnMH_V("getProto", ScriptObject.class); 150 151 static final MethodHandle MEGAMORPHIC_GET = findOwnMH_V("megamorphicGet", Object.class, String.class, boolean.class); 152 static final MethodHandle GLOBALFILTER = findOwnMH_S("globalFilter", Object.class, Object.class); 153 static final MethodHandle DECLARE_AND_SET = findOwnMH_V("declareAndSet", void.class, String.class, Object.class); 154 155 private static final MethodHandle TRUNCATINGFILTER = findOwnMH_S("truncatingFilter", Object[].class, int.class, Object[].class); 156 private static final MethodHandle KNOWNFUNCPROPGUARDSELF = findOwnMH_S("knownFunctionPropertyGuardSelf", boolean.class, Object.class, PropertyMap.class, MethodHandle.class, ScriptFunction.class); 157 private static final MethodHandle KNOWNFUNCPROPGUARDPROTO = findOwnMH_S("knownFunctionPropertyGuardProto", boolean.class, Object.class, PropertyMap.class, MethodHandle.class, int.class, ScriptFunction.class); 158 159 private static final ArrayList<MethodHandle> PROTO_FILTERS = new ArrayList<>(); 160 161 /** Method handle for getting the array data */ 162 public static final Call GET_ARRAY = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getArray", ArrayData.class); 163 164 /** Method handle for getting a function argument at a given index. Used from MapCreator */ 165 public static final Call GET_ARGUMENT = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getArgument", Object.class, int.class); 166 167 /** Method handle for setting a function argument at a given index. Used from MapCreator */ 168 public static final Call SET_ARGUMENT = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setArgument", void.class, int.class, Object.class); 169 170 /** Method handle for getting the proto of a ScriptObject */ 171 public static final Call GET_PROTO = virtualCallNoLookup(ScriptObject.class, "getProto", ScriptObject.class); 172 173 /** Method handle for getting the proto of a ScriptObject */ 174 public static final Call GET_PROTO_DEPTH = virtualCallNoLookup(ScriptObject.class, "getProto", ScriptObject.class, int.class); 175 176 /** Method handle for setting the proto of a ScriptObject */ 177 public static final Call SET_GLOBAL_OBJECT_PROTO = staticCallNoLookup(ScriptObject.class, "setGlobalObjectProto", void.class, ScriptObject.class); 178 179 /** Method handle for setting the proto of a ScriptObject after checking argument */ 180 public static final Call SET_PROTO_FROM_LITERAL = virtualCallNoLookup(ScriptObject.class, "setProtoFromLiteral", void.class, Object.class); 181 182 /** Method handle for setting the user accessors of a ScriptObject */ 183 //TODO fastpath this 184 public static final Call SET_USER_ACCESSORS = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setUserAccessors", void.class, String.class, ScriptFunction.class, ScriptFunction.class); 185 186 static final MethodHandle[] SET_SLOW = new MethodHandle[] { 187 findOwnMH_V("set", void.class, Object.class, int.class, int.class), 188 findOwnMH_V("set", void.class, Object.class, long.class, int.class), 189 findOwnMH_V("set", void.class, Object.class, double.class, int.class), 190 findOwnMH_V("set", void.class, Object.class, Object.class, int.class) 191 }; 192 193 /** Method handle to reset the map of this ScriptObject */ 194 public static final Call SET_MAP = virtualCallNoLookup(ScriptObject.class, "setMap", void.class, PropertyMap.class); 195 196 static final MethodHandle CAS_MAP = findOwnMH_V("compareAndSetMap", boolean.class, PropertyMap.class, PropertyMap.class); 197 static final MethodHandle EXTENSION_CHECK = findOwnMH_V("extensionCheck", boolean.class, boolean.class, String.class); 198 static final MethodHandle ENSURE_SPILL_SIZE = findOwnMH_V("ensureSpillSize", Object.class, int.class); 199 200 /** 201 * Constructor 202 */ 203 public ScriptObject() { 204 this(null); 205 } 206 207 /** 208 * Constructor 209 * 210 * @param map {@link PropertyMap} used to create the initial object 211 */ 212 public ScriptObject(final PropertyMap map) { 213 if (Context.DEBUG) { 214 ScriptObject.count++; 215 } 216 this.arrayData = ArrayData.EMPTY_ARRAY; 217 this.setMap(map == null ? PropertyMap.newMap() : map); 218 } 219 220 /** 221 * Constructor that directly sets the prototype to {@code proto} and property map to 222 * {@code map} without invalidating the map as calling {@link #setProto(ScriptObject)} 223 * would do. This should only be used for objects that are always constructed with the 224 * same combination of prototype and property map. 225 * 226 * @param proto the prototype object 227 * @param map initial {@link PropertyMap} 228 */ 229 protected ScriptObject(final ScriptObject proto, final PropertyMap map) { 230 this(map); 231 this.proto = proto; 232 } 233 234 /** 235 * Constructor used to instantiate spill properties directly. Used from 236 * SpillObjectCreator. 237 * 238 * @param map property maps 239 * @param primitiveSpill primitive spills 240 * @param objectSpill reference spills 241 */ 242 public ScriptObject(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) { 243 this(map); 244 this.primitiveSpill = primitiveSpill; 245 this.objectSpill = objectSpill; 246 assert primitiveSpill == null || primitiveSpill.length == objectSpill.length : " primitive spill pool size is not the same length as object spill pool size"; 247 } 248 249 /** 250 * Check whether this is a global object 251 * @return true if global 252 */ 253 protected boolean isGlobal() { 254 return false; 255 } 256 257 private static int alignUp(final int size, final int alignment) { 258 return size + alignment - 1 & ~(alignment - 1); 259 } 260 261 /** 262 * Given a number of properties, return the aligned to SPILL_RATE 263 * buffer size required for the smallest spill pool needed to 264 * house them 265 * @param nProperties number of properties 266 * @return property buffer length, a multiple of SPILL_RATE 267 */ 268 public static int spillAllocationLength(final int nProperties) { 269 return alignUp(nProperties, SPILL_RATE); 270 } 271 272 /** 273 * Copy all properties from the source object with their receiver bound to the source. 274 * This function was known as mergeMap 275 * 276 * @param source The source object to copy from. 277 */ 278 public void addBoundProperties(final ScriptObject source) { 279 addBoundProperties(source, source.getMap().getProperties()); 280 } 281 282 /** 283 * Copy all properties from the array with their receiver bound to the source. 284 * 285 * @param source The source object to copy from. 286 * @param properties The array of properties to copy. 287 */ 288 public void addBoundProperties(final ScriptObject source, final Property[] properties) { 289 PropertyMap newMap = this.getMap(); 290 final boolean extensible = newMap.isExtensible(); 291 292 for (final Property property : properties) { 293 newMap = addBoundProperty(newMap, source, property, extensible); 294 } 295 296 this.setMap(newMap); 297 } 298 299 /** 300 * Add a bound property from {@code source}, using the interim property map {@code propMap}, and return the 301 * new interim property map. 302 * 303 * @param propMap the property map 304 * @param source the source object 305 * @param property the property to be added 306 * @param extensible whether the current object is extensible or not 307 * @return the new property map 308 */ 309 protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final Property property, final boolean extensible) { 310 PropertyMap newMap = propMap; 311 final String key = property.getKey(); 312 final Property oldProp = newMap.findProperty(key); 313 if (oldProp == null) { 314 if (! extensible) { 315 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this)); 316 } 317 318 if (property instanceof UserAccessorProperty) { 319 // Note: we copy accessor functions to this object which is semantically different from binding. 320 final UserAccessorProperty prop = this.newUserAccessors(key, property.getFlags(), property.getGetterFunction(source), property.getSetterFunction(source)); 321 newMap = newMap.addPropertyNoHistory(prop); 322 } else { 323 newMap = newMap.addPropertyBind((AccessorProperty)property, source); 324 } 325 } else { 326 // See ECMA section 10.5 Declaration Binding Instantiation 327 // step 5 processing each function declaration. 328 if (property.isFunctionDeclaration() && !oldProp.isConfigurable()) { 329 if (oldProp instanceof UserAccessorProperty || 330 !(oldProp.isWritable() && oldProp.isEnumerable())) { 331 throw typeError("cant.redefine.property", key, ScriptRuntime.safeToString(this)); 332 } 333 } 334 } 335 return newMap; 336 } 337 338 /** 339 * Copy all properties from the array with their receiver bound to the source. 340 * 341 * @param source The source object to copy from. 342 * @param properties The collection of accessor properties to copy. 343 */ 344 public void addBoundProperties(final Object source, final AccessorProperty[] properties) { 345 PropertyMap newMap = this.getMap(); 346 final boolean extensible = newMap.isExtensible(); 347 348 for (final AccessorProperty property : properties) { 349 final String key = property.getKey(); 350 351 if (newMap.findProperty(key) == null) { 352 if (! extensible) { 353 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this)); 354 } 355 newMap = newMap.addPropertyBind(property, source); 356 } 357 } 358 359 this.setMap(newMap); 360 } 361 362 /** 363 * Bind the method handle to the specified receiver, while preserving its original type (it will just ignore the 364 * first argument in lieu of the bound argument). 365 * @param methodHandle Method handle to bind to. 366 * @param receiver Object to bind. 367 * @return Bound method handle. 368 */ 369 static MethodHandle bindTo(final MethodHandle methodHandle, final Object receiver) { 370 return MH.dropArguments(MH.bindTo(methodHandle, receiver), 0, methodHandle.type().parameterType(0)); 371 } 372 373 /** 374 * Return a property iterator. 375 * @return Property iterator. 376 */ 377 public Iterator<String> propertyIterator() { 378 return new KeyIterator(this); 379 } 380 381 /** 382 * Return a property value iterator. 383 * @return Property value iterator. 384 */ 385 public Iterator<Object> valueIterator() { 386 return new ValueIterator(this); 387 } 388 389 /** 390 * ECMA 8.10.1 IsAccessorDescriptor ( Desc ) 391 * @return true if this has a {@link AccessorPropertyDescriptor} with a getter or a setter 392 */ 393 public final boolean isAccessorDescriptor() { 394 return has(GET) || has(SET); 395 } 396 397 /** 398 * ECMA 8.10.2 IsDataDescriptor ( Desc ) 399 * @return true if this has a {@link DataPropertyDescriptor}, i.e. the object has a property value and is writable 400 */ 401 public final boolean isDataDescriptor() { 402 return has(VALUE) || has(WRITABLE); 403 } 404 405 /** 406 * ECMA 8.10.5 ToPropertyDescriptor ( Obj ) 407 * 408 * @return property descriptor 409 */ 410 public final PropertyDescriptor toPropertyDescriptor() { 411 final Global global = Context.getGlobal(); 412 413 final PropertyDescriptor desc; 414 if (isDataDescriptor()) { 415 if (has(SET) || has(GET)) { 416 throw typeError(global, "inconsistent.property.descriptor"); 417 } 418 419 desc = global.newDataDescriptor(UNDEFINED, false, false, false); 420 } else if (isAccessorDescriptor()) { 421 if (has(VALUE) || has(WRITABLE)) { 422 throw typeError(global, "inconsistent.property.descriptor"); 423 } 424 425 desc = global.newAccessorDescriptor(UNDEFINED, UNDEFINED, false, false); 426 } else { 427 desc = global.newGenericDescriptor(false, false); 428 } 429 430 return desc.fillFrom(this); 431 } 432 433 /** 434 * ECMA 8.10.5 ToPropertyDescriptor ( Obj ) 435 * 436 * @param global global scope object 437 * @param obj object to create property descriptor from 438 * 439 * @return property descriptor 440 */ 441 public static PropertyDescriptor toPropertyDescriptor(final Global global, final Object obj) { 442 if (obj instanceof ScriptObject) { 443 return ((ScriptObject)obj).toPropertyDescriptor(); 444 } 445 446 throw typeError(global, "not.an.object", ScriptRuntime.safeToString(obj)); 447 } 448 449 /** 450 * ECMA 8.12.1 [[GetOwnProperty]] (P) 451 * 452 * @param key property key 453 * 454 * @return Returns the Property Descriptor of the named own property of this 455 * object, or undefined if absent. 456 */ 457 public Object getOwnPropertyDescriptor(final String key) { 458 final Property property = getMap().findProperty(key); 459 460 final Global global = Context.getGlobal(); 461 462 if (property != null) { 463 final ScriptFunction get = property.getGetterFunction(this); 464 final ScriptFunction set = property.getSetterFunction(this); 465 466 final boolean configurable = property.isConfigurable(); 467 final boolean enumerable = property.isEnumerable(); 468 final boolean writable = property.isWritable(); 469 470 if (property instanceof UserAccessorProperty) { 471 return global.newAccessorDescriptor( 472 get != null ? 473 get : 474 UNDEFINED, 475 set != null ? 476 set : 477 UNDEFINED, 478 configurable, 479 enumerable); 480 } 481 482 return global.newDataDescriptor(getWithProperty(property), configurable, enumerable, writable); 483 } 484 485 final int index = getArrayIndex(key); 486 final ArrayData array = getArray(); 487 488 if (array.has(index)) { 489 return array.getDescriptor(global, index); 490 } 491 492 return UNDEFINED; 493 } 494 495 /** 496 * ECMA 8.12.2 [[GetProperty]] (P) 497 * 498 * @param key property key 499 * 500 * @return Returns the fully populated Property Descriptor of the named property 501 * of this object, or undefined if absent. 502 */ 503 public Object getPropertyDescriptor(final String key) { 504 final Object res = getOwnPropertyDescriptor(key); 505 506 if (res != UNDEFINED) { 507 return res; 508 } else if (getProto() != null) { 509 return getProto().getOwnPropertyDescriptor(key); 510 } else { 511 return UNDEFINED; 512 } 513 } 514 515 /** 516 * Invalidate any existing global constant method handles that may exist for {@code key}. 517 * @param key the property name 518 */ 519 protected void invalidateGlobalConstant(final String key) { 520 final GlobalConstants globalConstants = getGlobalConstants(); 521 if (globalConstants != null) { 522 globalConstants.delete(key); 523 } 524 } 525 526 /** 527 * ECMA 8.12.9 [[DefineOwnProperty]] (P, Desc, Throw) 528 * 529 * @param key the property key 530 * @param propertyDesc the property descriptor 531 * @param reject is the property extensible - true means new definitions are rejected 532 * 533 * @return true if property was successfully defined 534 */ 535 public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) { 536 final Global global = Context.getGlobal(); 537 final PropertyDescriptor desc = toPropertyDescriptor(global, propertyDesc); 538 final Object current = getOwnPropertyDescriptor(key); 539 final String name = JSType.toString(key); 540 541 invalidateGlobalConstant(key); 542 543 if (current == UNDEFINED) { 544 if (isExtensible()) { 545 // add a new own property 546 addOwnProperty(key, desc); 547 return true; 548 } 549 // new property added to non-extensible object 550 if (reject) { 551 throw typeError(global, "object.non.extensible", name, ScriptRuntime.safeToString(this)); 552 } 553 return false; 554 } 555 556 // modifying an existing property 557 final PropertyDescriptor currentDesc = (PropertyDescriptor)current; 558 final PropertyDescriptor newDesc = desc; 559 560 if (newDesc.type() == PropertyDescriptor.GENERIC && !newDesc.has(CONFIGURABLE) && !newDesc.has(ENUMERABLE)) { 561 // every descriptor field is absent 562 return true; 563 } 564 565 if (newDesc.hasAndEquals(currentDesc)) { 566 // every descriptor field of the new is same as the current 567 return true; 568 } 569 570 if (!currentDesc.isConfigurable()) { 571 if (newDesc.has(CONFIGURABLE) && newDesc.isConfigurable()) { 572 // not configurable can not be made configurable 573 if (reject) { 574 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 575 } 576 return false; 577 } 578 579 if (newDesc.has(ENUMERABLE) && 580 currentDesc.isEnumerable() != newDesc.isEnumerable()) { 581 // cannot make non-enumerable as enumerable or vice-versa 582 if (reject) { 583 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 584 } 585 return false; 586 } 587 } 588 589 int propFlags = Property.mergeFlags(currentDesc, newDesc); 590 Property property = getMap().findProperty(key); 591 592 if (currentDesc.type() == PropertyDescriptor.DATA && 593 (newDesc.type() == PropertyDescriptor.DATA || 594 newDesc.type() == PropertyDescriptor.GENERIC)) { 595 if (!currentDesc.isConfigurable() && !currentDesc.isWritable()) { 596 if (newDesc.has(WRITABLE) && newDesc.isWritable() || 597 newDesc.has(VALUE) && !ScriptRuntime.sameValue(currentDesc.getValue(), newDesc.getValue())) { 598 if (reject) { 599 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 600 } 601 return false; 602 } 603 } 604 605 final boolean newValue = newDesc.has(VALUE); 606 final Object value = newValue ? newDesc.getValue() : currentDesc.getValue(); 607 608 if (newValue && property != null) { 609 // Temporarily clear flags. 610 property = modifyOwnProperty(property, 0); 611 set(key, value, 0); 612 //this might change the map if we change types of the property 613 //hence we need to read it again. note that we should probably 614 //have the setter return the new property throughout and in 615 //general respect Property return values from modify and add 616 //functions - which we don't seem to do at all here :-( 617 //There is already a bug filed to generify PropertyAccess so we 618 //can have the setter return e.g. a Property 619 property = getMap().findProperty(key); 620 } 621 622 if (property == null) { 623 // promoting an arrayData value to actual property 624 addOwnProperty(key, propFlags, value); 625 checkIntegerKey(key); 626 } else { 627 // Now set the new flags 628 modifyOwnProperty(property, propFlags); 629 } 630 } else if (currentDesc.type() == PropertyDescriptor.ACCESSOR && 631 (newDesc.type() == PropertyDescriptor.ACCESSOR || 632 newDesc.type() == PropertyDescriptor.GENERIC)) { 633 if (!currentDesc.isConfigurable()) { 634 if (newDesc.has(PropertyDescriptor.GET) && !ScriptRuntime.sameValue(currentDesc.getGetter(), newDesc.getGetter()) || 635 newDesc.has(PropertyDescriptor.SET) && !ScriptRuntime.sameValue(currentDesc.getSetter(), newDesc.getSetter())) { 636 if (reject) { 637 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 638 } 639 return false; 640 } 641 } 642 // New set the new features. 643 modifyOwnProperty(property, propFlags, 644 newDesc.has(GET) ? newDesc.getGetter() : currentDesc.getGetter(), 645 newDesc.has(SET) ? newDesc.getSetter() : currentDesc.getSetter()); 646 } else { 647 // changing descriptor type 648 if (!currentDesc.isConfigurable()) { 649 // not configurable can not be made configurable 650 if (reject) { 651 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 652 } 653 return false; 654 } 655 656 propFlags = 0; 657 658 // Preserve only configurable and enumerable from current desc 659 // if those are not overridden in the new property descriptor. 660 boolean value = newDesc.has(CONFIGURABLE) ? newDesc.isConfigurable() : currentDesc.isConfigurable(); 661 if (!value) { 662 propFlags |= Property.NOT_CONFIGURABLE; 663 } 664 value = newDesc.has(ENUMERABLE)? newDesc.isEnumerable() : currentDesc.isEnumerable(); 665 if (!value) { 666 propFlags |= Property.NOT_ENUMERABLE; 667 } 668 669 final int type = newDesc.type(); 670 if (type == PropertyDescriptor.DATA) { 671 // get writable from the new descriptor 672 value = newDesc.has(WRITABLE) && newDesc.isWritable(); 673 if (!value) { 674 propFlags |= Property.NOT_WRITABLE; 675 } 676 677 // delete the old property 678 deleteOwnProperty(property); 679 // add new data property 680 addOwnProperty(key, propFlags, newDesc.getValue()); 681 } else if (type == PropertyDescriptor.ACCESSOR) { 682 if (property == null) { 683 addOwnProperty(key, propFlags, 684 newDesc.has(GET) ? newDesc.getGetter() : null, 685 newDesc.has(SET) ? newDesc.getSetter() : null); 686 } else { 687 // Modify old property with the new features. 688 modifyOwnProperty(property, propFlags, 689 newDesc.has(GET) ? newDesc.getGetter() : null, 690 newDesc.has(SET) ? newDesc.getSetter() : null); 691 } 692 } 693 } 694 695 checkIntegerKey(key); 696 697 return true; 698 } 699 700 /** 701 * Almost like defineOwnProperty(int,Object) for arrays this one does 702 * not add 'gap' elements (like the array one does). 703 * 704 * @param index key for property 705 * @param value value to define 706 */ 707 public void defineOwnProperty(final int index, final Object value) { 708 assert isValidArrayIndex(index) : "invalid array index"; 709 final long longIndex = ArrayIndex.toLongIndex(index); 710 final long oldLength = getArray().length(); 711 if (longIndex >= oldLength) { 712 setArray(getArray().ensure(longIndex)); 713 doesNotHaveEnsureDelete(longIndex, oldLength, false); 714 } 715 setArray(getArray().set(index, value, false)); 716 } 717 718 private void checkIntegerKey(final String key) { 719 final int index = getArrayIndex(key); 720 721 if (isValidArrayIndex(index)) { 722 final ArrayData data = getArray(); 723 724 if (data.has(index)) { 725 setArray(data.delete(index)); 726 } 727 } 728 } 729 730 /** 731 * Add a new property to the object. 732 * 733 * @param key property key 734 * @param propertyDesc property descriptor for property 735 */ 736 public final void addOwnProperty(final String key, final PropertyDescriptor propertyDesc) { 737 // Already checked that there is no own property with that key. 738 PropertyDescriptor pdesc = propertyDesc; 739 740 final int propFlags = Property.toFlags(pdesc); 741 742 if (pdesc.type() == PropertyDescriptor.GENERIC) { 743 final Global global = Context.getGlobal(); 744 final PropertyDescriptor dDesc = global.newDataDescriptor(UNDEFINED, false, false, false); 745 746 dDesc.fillFrom((ScriptObject)pdesc); 747 pdesc = dDesc; 748 } 749 750 final int type = pdesc.type(); 751 if (type == PropertyDescriptor.DATA) { 752 addOwnProperty(key, propFlags, pdesc.getValue()); 753 } else if (type == PropertyDescriptor.ACCESSOR) { 754 addOwnProperty(key, propFlags, 755 pdesc.has(GET) ? pdesc.getGetter() : null, 756 pdesc.has(SET) ? pdesc.getSetter() : null); 757 } 758 759 checkIntegerKey(key); 760 } 761 762 /** 763 * Low level property API (not using property descriptors) 764 * <p> 765 * Find a property in the prototype hierarchy. Note: this is final and not 766 * a good idea to override. If you have to, use 767 * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or 768 * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the 769 * overriding way to find array properties 770 * 771 * @see jdk.nashorn.internal.objects.NativeArray 772 * 773 * @param key Property key. 774 * @param deep Whether the search should look up proto chain. 775 * 776 * @return FindPropertyData or null if not found. 777 */ 778 public final FindProperty findProperty(final String key, final boolean deep) { 779 return findProperty(key, deep, this); 780 } 781 782 /** 783 * Low level property API (not using property descriptors) 784 * <p> 785 * Find a property in the prototype hierarchy. Note: this is not a good idea 786 * to override except as it was done in {@link WithObject}. 787 * If you have to, use 788 * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or 789 * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the 790 * overriding way to find array properties 791 * 792 * @see jdk.nashorn.internal.objects.NativeArray 793 * 794 * @param key Property key. 795 * @param deep Whether the search should look up proto chain. 796 * @param start the object on which the lookup was originally initiated 797 * 798 * @return FindPropertyData or null if not found. 799 */ 800 protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) { 801 802 final PropertyMap selfMap = getMap(); 803 final Property property = selfMap.findProperty(key); 804 805 if (property != null) { 806 return new FindProperty(start, this, property); 807 } 808 809 if (deep) { 810 final ScriptObject myProto = getProto(); 811 if (myProto != null) { 812 return myProto.findProperty(key, deep, start); 813 } 814 } 815 816 return null; 817 } 818 819 /** 820 * Low level property API. This is similar to {@link #findProperty(String, boolean)} but returns a 821 * {@code boolean} value instead of a {@link FindProperty} object. 822 * @param key Property key. 823 * @param deep Whether the search should look up proto chain. 824 * @return true if the property was found. 825 */ 826 boolean hasProperty(final String key, final boolean deep) { 827 if (getMap().findProperty(key) != null) { 828 return true; 829 } 830 831 if (deep) { 832 final ScriptObject myProto = getProto(); 833 if (myProto != null) { 834 return myProto.hasProperty(key, deep); 835 } 836 } 837 838 return false; 839 } 840 841 private SwitchPoint findBuiltinSwitchPoint(final String key) { 842 for (ScriptObject myProto = getProto(); myProto != null; myProto = myProto.getProto()) { 843 final Property prop = myProto.getMap().findProperty(key); 844 if (prop != null) { 845 final SwitchPoint sp = prop.getBuiltinSwitchPoint(); 846 if (sp != null && !sp.hasBeenInvalidated()) { 847 return sp; 848 } 849 } 850 } 851 return null; 852 } 853 854 /** 855 * Add a new property to the object. 856 * <p> 857 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s 858 * 859 * @param key Property key. 860 * @param propertyFlags Property flags. 861 * @param getter Property getter, or null if not defined 862 * @param setter Property setter, or null if not defined 863 * 864 * @return New property. 865 */ 866 public final Property addOwnProperty(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 867 return addOwnProperty(newUserAccessors(key, propertyFlags, getter, setter)); 868 } 869 870 /** 871 * Add a new property to the object. 872 * <p> 873 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s 874 * 875 * @param key Property key. 876 * @param propertyFlags Property flags. 877 * @param value Value of property 878 * 879 * @return New property. 880 */ 881 public final Property addOwnProperty(final String key, final int propertyFlags, final Object value) { 882 return addSpillProperty(key, propertyFlags, value, true); 883 } 884 885 /** 886 * Add a new property to the object. 887 * <p> 888 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s 889 * 890 * @param newProperty property to add 891 * 892 * @return New property. 893 */ 894 public final Property addOwnProperty(final Property newProperty) { 895 PropertyMap oldMap = getMap(); 896 while (true) { 897 final PropertyMap newMap = oldMap.addProperty(newProperty); 898 if (!compareAndSetMap(oldMap, newMap)) { 899 oldMap = getMap(); 900 final Property oldProperty = oldMap.findProperty(newProperty.getKey()); 901 902 if (oldProperty != null) { 903 return oldProperty; 904 } 905 } else { 906 return newProperty; 907 } 908 } 909 } 910 911 private void erasePropertyValue(final Property property) { 912 // Erase the property field value with undefined. If the property is defined 913 // by user-defined accessors, we don't want to call the setter!! 914 if (!(property instanceof UserAccessorProperty)) { 915 assert property != null; 916 property.setValue(this, this, UNDEFINED, false); 917 } 918 } 919 920 /** 921 * Delete a property from the object. 922 * 923 * @param property Property to delete. 924 * 925 * @return true if deleted. 926 */ 927 public final boolean deleteOwnProperty(final Property property) { 928 erasePropertyValue(property); 929 PropertyMap oldMap = getMap(); 930 931 while (true) { 932 final PropertyMap newMap = oldMap.deleteProperty(property); 933 934 if (newMap == null) { 935 return false; 936 } 937 938 if (!compareAndSetMap(oldMap, newMap)) { 939 oldMap = getMap(); 940 } else { 941 // delete getter and setter function references so that we don't leak 942 if (property instanceof UserAccessorProperty) { 943 ((UserAccessorProperty)property).setAccessors(this, getMap(), null); 944 } 945 946 invalidateGlobalConstant(property.getKey()); 947 return true; 948 } 949 } 950 951 } 952 953 /** 954 * Fast initialization functions for ScriptFunctions that are strict, to avoid 955 * creating setters that probably aren't used. Inject directly into the spill pool 956 * the defaults for "arguments" and "caller" 957 * 958 * @param key property key 959 * @param propertyFlags flags 960 * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A 961 * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A 962 */ 963 protected final void initUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 964 final PropertyMap oldMap = getMap(); 965 final int slot = oldMap.getFreeSpillSlot(); 966 ensureSpillSize(slot); 967 objectSpill[slot] = new UserAccessorProperty.Accessors(getter, setter); 968 Property newProperty; 969 PropertyMap newMap; 970 do { 971 newProperty = new UserAccessorProperty(key, propertyFlags, slot); 972 newMap = oldMap.addProperty(newProperty); 973 } while (!compareAndSetMap(oldMap, newMap)); 974 } 975 976 /** 977 * Modify a property in the object 978 * 979 * @param oldProperty property to modify 980 * @param propertyFlags new property flags 981 * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A 982 * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A 983 * 984 * @return new property 985 */ 986 public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 987 Property newProperty; 988 989 if (oldProperty instanceof UserAccessorProperty) { 990 final UserAccessorProperty uc = (UserAccessorProperty)oldProperty; 991 final int slot = uc.getSlot(); 992 993 assert uc.getLocalType() == Object.class; 994 final UserAccessorProperty.Accessors gs = uc.getAccessors(this); //this crashes 995 assert gs != null; 996 //reuse existing getter setter for speed 997 gs.set(getter, setter); 998 if (uc.getFlags() == propertyFlags) { 999 return oldProperty; 1000 } 1001 newProperty = new UserAccessorProperty(uc.getKey(), propertyFlags, slot); 1002 } else { 1003 // erase old property value and create new user accessor property 1004 erasePropertyValue(oldProperty); 1005 newProperty = newUserAccessors(oldProperty.getKey(), propertyFlags, getter, setter); 1006 } 1007 1008 return modifyOwnProperty(oldProperty, newProperty); 1009 } 1010 1011 /** 1012 * Modify a property in the object 1013 * 1014 * @param oldProperty property to modify 1015 * @param propertyFlags new property flags 1016 * 1017 * @return new property 1018 */ 1019 public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags) { 1020 return modifyOwnProperty(oldProperty, oldProperty.setFlags(propertyFlags)); 1021 } 1022 1023 /** 1024 * Modify a property in the object, replacing a property with a new one 1025 * 1026 * @param oldProperty property to replace 1027 * @param newProperty property to replace it with 1028 * 1029 * @return new property 1030 */ 1031 private Property modifyOwnProperty(final Property oldProperty, final Property newProperty) { 1032 if (oldProperty == newProperty) { 1033 return newProperty; //nop 1034 } 1035 1036 assert newProperty.getKey().equals(oldProperty.getKey()) : "replacing property with different key"; 1037 1038 PropertyMap oldMap = getMap(); 1039 1040 while (true) { 1041 final PropertyMap newMap = oldMap.replaceProperty(oldProperty, newProperty); 1042 1043 if (!compareAndSetMap(oldMap, newMap)) { 1044 oldMap = getMap(); 1045 final Property oldPropertyLookup = oldMap.findProperty(oldProperty.getKey()); 1046 1047 if (oldPropertyLookup != null && oldPropertyLookup.equals(newProperty)) { 1048 return oldPropertyLookup; 1049 } 1050 } else { 1051 return newProperty; 1052 } 1053 } 1054 } 1055 1056 /** 1057 * Update getter and setter in an object literal. 1058 * 1059 * @param key Property key. 1060 * @param getter {@link UserAccessorProperty} defined getter, or null if none 1061 * @param setter {@link UserAccessorProperty} defined setter, or null if none 1062 */ 1063 public final void setUserAccessors(final String key, final ScriptFunction getter, final ScriptFunction setter) { 1064 final Property oldProperty = getMap().findProperty(key); 1065 if (oldProperty instanceof UserAccessorProperty) { 1066 modifyOwnProperty(oldProperty, oldProperty.getFlags(), getter, setter); 1067 } else { 1068 addOwnProperty(newUserAccessors(key, oldProperty != null ? oldProperty.getFlags() : 0, getter, setter)); 1069 } 1070 } 1071 1072 private static int getIntValue(final FindProperty find, final int programPoint) { 1073 final MethodHandle getter = find.getGetter(int.class, programPoint, null); 1074 if (getter != null) { 1075 try { 1076 return (int)getter.invokeExact((Object)find.getGetterReceiver()); 1077 } catch (final Error|RuntimeException e) { 1078 throw e; 1079 } catch (final Throwable e) { 1080 throw new RuntimeException(e); 1081 } 1082 } 1083 1084 return UNDEFINED_INT; 1085 } 1086 1087 private static long getLongValue(final FindProperty find, final int programPoint) { 1088 final MethodHandle getter = find.getGetter(long.class, programPoint, null); 1089 if (getter != null) { 1090 try { 1091 return (long)getter.invokeExact((Object)find.getGetterReceiver()); 1092 } catch (final Error|RuntimeException e) { 1093 throw e; 1094 } catch (final Throwable e) { 1095 throw new RuntimeException(e); 1096 } 1097 } 1098 1099 return UNDEFINED_LONG; 1100 } 1101 1102 private static double getDoubleValue(final FindProperty find, final int programPoint) { 1103 final MethodHandle getter = find.getGetter(double.class, programPoint, null); 1104 if (getter != null) { 1105 try { 1106 return (double)getter.invokeExact((Object)find.getGetterReceiver()); 1107 } catch (final Error|RuntimeException e) { 1108 throw e; 1109 } catch (final Throwable e) { 1110 throw new RuntimeException(e); 1111 } 1112 } 1113 1114 return UNDEFINED_DOUBLE; 1115 } 1116 1117 /** 1118 * Return methodHandle of value function for call. 1119 * 1120 * @param find data from find property. 1121 * @param type method type of function. 1122 * @param bindName null or name to bind to second argument (property not found method.) 1123 * 1124 * @return value of property as a MethodHandle or null. 1125 */ 1126 protected MethodHandle getCallMethodHandle(final FindProperty find, final MethodType type, final String bindName) { 1127 return getCallMethodHandle(find.getObjectValue(), type, bindName); 1128 } 1129 1130 /** 1131 * Return methodHandle of value function for call. 1132 * 1133 * @param value value of receiver, it not a {@link ScriptFunction} this will return null. 1134 * @param type method type of function. 1135 * @param bindName null or name to bind to second argument (property not found method.) 1136 * 1137 * @return value of property as a MethodHandle or null. 1138 */ 1139 protected static MethodHandle getCallMethodHandle(final Object value, final MethodType type, final String bindName) { 1140 return value instanceof ScriptFunction ? ((ScriptFunction)value).getCallMethodHandle(type, bindName) : null; 1141 } 1142 1143 /** 1144 * Get value using found property. 1145 * 1146 * @param property Found property. 1147 * 1148 * @return Value of property. 1149 */ 1150 public final Object getWithProperty(final Property property) { 1151 return new FindProperty(this, this, property).getObjectValue(); 1152 } 1153 1154 /** 1155 * Get a property given a key 1156 * 1157 * @param key property key 1158 * 1159 * @return property for key 1160 */ 1161 public final Property getProperty(final String key) { 1162 return getMap().findProperty(key); 1163 } 1164 1165 /** 1166 * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.) 1167 * Used for argument access in a vararg function using parameter name. 1168 * Returns the argument at a given key (index) 1169 * 1170 * @param key argument index 1171 * 1172 * @return the argument at the given position, or undefined if not present 1173 */ 1174 public Object getArgument(final int key) { 1175 return get(key); 1176 } 1177 1178 /** 1179 * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.) 1180 * Used for argument access in a vararg function using parameter name. 1181 * Returns the argument at a given key (index) 1182 * 1183 * @param key argument index 1184 * @param value the value to write at the given index 1185 */ 1186 public void setArgument(final int key, final Object value) { 1187 set(key, value, 0); 1188 } 1189 1190 /** 1191 * Return the current context from the object's map. 1192 * @return Current context. 1193 */ 1194 protected Context getContext() { 1195 return Context.fromClass(getClass()); 1196 } 1197 1198 /** 1199 * Return the map of an object. 1200 * @return PropertyMap object. 1201 */ 1202 public final PropertyMap getMap() { 1203 return map; 1204 } 1205 1206 /** 1207 * Set the initial map. 1208 * @param map Initial map. 1209 */ 1210 public final void setMap(final PropertyMap map) { 1211 this.map = map; 1212 } 1213 1214 /** 1215 * Conditionally set the new map if the old map is the same. 1216 * @param oldMap Map prior to manipulation. 1217 * @param newMap Replacement map. 1218 * @return true if the operation succeeded. 1219 */ 1220 protected final boolean compareAndSetMap(final PropertyMap oldMap, final PropertyMap newMap) { 1221 if (oldMap == this.map) { 1222 this.map = newMap; 1223 return true; 1224 } 1225 return false; 1226 } 1227 1228 /** 1229 * Return the __proto__ of an object. 1230 * @return __proto__ object. 1231 */ 1232 public final ScriptObject getProto() { 1233 return proto; 1234 } 1235 1236 /** 1237 * Get the proto of a specific depth 1238 * @param n depth 1239 * @return proto at given depth 1240 */ 1241 public final ScriptObject getProto(final int n) { 1242 assert n > 0; 1243 ScriptObject p = getProto(); 1244 for (int i = n; i-- > 0;) { 1245 p = p.getProto(); 1246 } 1247 return p; 1248 } 1249 1250 /** 1251 * Set the __proto__ of an object. 1252 * @param newProto new __proto__ to set. 1253 */ 1254 public final void setProto(final ScriptObject newProto) { 1255 final ScriptObject oldProto = proto; 1256 1257 if (oldProto != newProto) { 1258 proto = newProto; 1259 1260 // Let current listeners know that the prototype has changed and set our map 1261 final PropertyListeners listeners = getMap().getListeners(); 1262 if (listeners != null) { 1263 listeners.protoChanged(); 1264 } 1265 // Replace our current allocator map with one that is associated with the new prototype. 1266 setMap(getMap().changeProto(newProto)); 1267 } 1268 } 1269 1270 /** 1271 * Set the initial __proto__ of this object. This should be used instead of 1272 * {@link #setProto} if it is known that the current property map will not be 1273 * used on a new object with any other parent property map, so we can pass over 1274 * property map invalidation/evolution. 1275 * 1276 * @param initialProto the initial __proto__ to set. 1277 */ 1278 public void setInitialProto(final ScriptObject initialProto) { 1279 this.proto = initialProto; 1280 } 1281 1282 /** 1283 * Invoked from generated bytecode to initialize the prototype of object literals to the global Object prototype. 1284 * @param obj the object literal that needs to have its prototype initialized to the global Object prototype. 1285 */ 1286 public static void setGlobalObjectProto(final ScriptObject obj) { 1287 obj.setInitialProto(Global.objectPrototype()); 1288 } 1289 1290 /** 1291 * Set the __proto__ of an object with checks. 1292 * This is the built-in operation [[SetPrototypeOf]] 1293 * See ES6 draft spec: 9.1.2 [[SetPrototypeOf]] (V) 1294 * 1295 * @param newProto Prototype to set. 1296 */ 1297 public final void setPrototypeOf(final Object newProto) { 1298 if (newProto == null || newProto instanceof ScriptObject) { 1299 if (! isExtensible()) { 1300 // okay to set same proto again - even if non-extensible 1301 1302 if (newProto == getProto()) { 1303 return; 1304 } 1305 throw typeError("__proto__.set.non.extensible", ScriptRuntime.safeToString(this)); 1306 } 1307 1308 // check for circularity 1309 ScriptObject p = (ScriptObject)newProto; 1310 while (p != null) { 1311 if (p == this) { 1312 throw typeError("circular.__proto__.set", ScriptRuntime.safeToString(this)); 1313 } 1314 p = p.getProto(); 1315 } 1316 setProto((ScriptObject)newProto); 1317 } else { 1318 throw typeError("cant.set.proto.to.non.object", ScriptRuntime.safeToString(this), ScriptRuntime.safeToString(newProto)); 1319 } 1320 } 1321 1322 /** 1323 * Set the __proto__ of an object from an object literal. 1324 * See ES6 draft spec: B.3.1 __proto__ Property Names in 1325 * Object Initializers. Step 6 handling of "__proto__". 1326 * 1327 * @param newProto Prototype to set. 1328 */ 1329 public final void setProtoFromLiteral(final Object newProto) { 1330 if (newProto == null || newProto instanceof ScriptObject) { 1331 setPrototypeOf(newProto); 1332 } else { 1333 // Some non-object, non-null. Then, we need to set 1334 // Object.prototype as the new __proto__ 1335 // 1336 // var obj = { __proto__ : 34 }; 1337 // print(obj.__proto__ === Object.prototype); // => true 1338 setPrototypeOf(Global.objectPrototype()); 1339 } 1340 } 1341 1342 /** 1343 * return an array of all property keys - all inherited, non-enumerable included. 1344 * This is meant for source code completion by interactive shells or editors. 1345 * 1346 * @return Array of keys, order of properties is undefined. 1347 */ 1348 public String[] getAllKeys() { 1349 final Set<String> keys = new HashSet<>(); 1350 final Set<String> nonEnumerable = new HashSet<>(); 1351 for (ScriptObject self = this; self != null; self = self.getProto()) { 1352 keys.addAll(Arrays.asList(self.getOwnKeys(true, nonEnumerable))); 1353 } 1354 return keys.toArray(new String[keys.size()]); 1355 } 1356 1357 /** 1358 * return an array of own property keys associated with the object. 1359 * 1360 * @param all True if to include non-enumerable keys. 1361 * @return Array of keys. 1362 */ 1363 public final String[] getOwnKeys(final boolean all) { 1364 return getOwnKeys(all, null); 1365 } 1366 1367 /** 1368 * return an array of own property keys associated with the object. 1369 * 1370 * @param all True if to include non-enumerable keys. 1371 * @param nonEnumerable set of non-enumerable properties seen already.Used 1372 to filter out shadowed, but enumerable properties from proto children. 1373 * @return Array of keys. 1374 */ 1375 protected String[] getOwnKeys(final boolean all, final Set<String> nonEnumerable) { 1376 final List<Object> keys = new ArrayList<>(); 1377 final PropertyMap selfMap = this.getMap(); 1378 1379 final ArrayData array = getArray(); 1380 1381 for (final Iterator<Long> iter = array.indexIterator(); iter.hasNext(); ) { 1382 keys.add(JSType.toString(iter.next().longValue())); 1383 } 1384 1385 for (final Property property : selfMap.getProperties()) { 1386 final boolean enumerable = property.isEnumerable(); 1387 final String key = property.getKey(); 1388 if (all) { 1389 keys.add(key); 1390 } else if (enumerable) { 1391 // either we don't have non-enumerable filter set or filter set 1392 // does not contain the current property. 1393 if (nonEnumerable == null || !nonEnumerable.contains(key)) { 1394 keys.add(key); 1395 } 1396 } else { 1397 // store this non-enumerable property for later proto walk 1398 if (nonEnumerable != null) { 1399 nonEnumerable.add(key); 1400 } 1401 } 1402 } 1403 1404 return keys.toArray(new String[keys.size()]); 1405 } 1406 1407 /** 1408 * Check if this ScriptObject has array entries. This means that someone has 1409 * set values with numeric keys in the object. 1410 * 1411 * @return true if array entries exists. 1412 */ 1413 public boolean hasArrayEntries() { 1414 return getArray().length() > 0 || getMap().containsArrayKeys(); 1415 } 1416 1417 /** 1418 * Return the valid JavaScript type name descriptor 1419 * 1420 * @return "Object" 1421 */ 1422 public String getClassName() { 1423 return "Object"; 1424 } 1425 1426 /** 1427 * {@code length} is a well known property. This is its getter. 1428 * Note that this *may* be optimized by other classes 1429 * 1430 * @return length property value for this ScriptObject 1431 */ 1432 public Object getLength() { 1433 return get("length"); 1434 } 1435 1436 /** 1437 * Stateless toString for ScriptObjects. 1438 * 1439 * @return string description of this object, e.g. {@code [object Object]} 1440 */ 1441 public String safeToString() { 1442 return "[object " + getClassName() + "]"; 1443 } 1444 1445 /** 1446 * Return the default value of the object with a given preferred type hint. 1447 * The preferred type hints are String.class for type String, Number.class 1448 * for type Number. <p> 1449 * 1450 * A <code>hint</code> of null means "no hint". 1451 * 1452 * ECMA 8.12.8 [[DefaultValue]](hint) 1453 * 1454 * @param typeHint the preferred type hint 1455 * @return the default value 1456 */ 1457 public Object getDefaultValue(final Class<?> typeHint) { 1458 // We delegate to Global, as the implementation uses dynamic call sites to invoke object's "toString" and 1459 // "valueOf" methods, and in order to avoid those call sites from becoming megamorphic when multiple contexts 1460 // are being executed in a long-running program, we move the code and their associated dynamic call sites 1461 // (Global.TO_STRING and Global.VALUE_OF) into per-context code. 1462 return Context.getGlobal().getDefaultValue(this, typeHint); 1463 } 1464 1465 /** 1466 * Checking whether a script object is an instance of another. Used 1467 * in {@link ScriptFunction} for hasInstance implementation, walks 1468 * the proto chain 1469 * 1470 * @param instance instance to check 1471 * @return true if 'instance' is an instance of this object 1472 */ 1473 public boolean isInstance(final ScriptObject instance) { 1474 return false; 1475 } 1476 1477 /** 1478 * Flag this ScriptObject as non extensible 1479 * 1480 * @return the object after being made non extensible 1481 */ 1482 public ScriptObject preventExtensions() { 1483 PropertyMap oldMap = getMap(); 1484 while (!compareAndSetMap(oldMap, getMap().preventExtensions())) { 1485 oldMap = getMap(); 1486 } 1487 1488 //invalidate any fast array setters 1489 final ArrayData array = getArray(); 1490 assert array != null; 1491 setArray(ArrayData.preventExtension(array)); 1492 return this; 1493 } 1494 1495 /** 1496 * Check whether if an Object (not just a ScriptObject) represents JavaScript array 1497 * 1498 * @param obj object to check 1499 * 1500 * @return true if array 1501 */ 1502 public static boolean isArray(final Object obj) { 1503 return obj instanceof ScriptObject && ((ScriptObject)obj).isArray(); 1504 } 1505 1506 /** 1507 * Check if this ScriptObject is an array 1508 * @return true if array 1509 */ 1510 public final boolean isArray() { 1511 return (flags & IS_ARRAY) != 0; 1512 } 1513 1514 /** 1515 * Flag this ScriptObject as being an array 1516 */ 1517 public final void setIsArray() { 1518 flags |= IS_ARRAY; 1519 } 1520 1521 /** 1522 * Check if this ScriptObject is an {@code arguments} vector 1523 * @return true if arguments vector 1524 */ 1525 public final boolean isArguments() { 1526 return (flags & IS_ARGUMENTS) != 0; 1527 } 1528 1529 /** 1530 * Flag this ScriptObject as being an {@code arguments} vector 1531 */ 1532 public final void setIsArguments() { 1533 flags |= IS_ARGUMENTS; 1534 } 1535 1536 /** 1537 * Check if this object has non-writable length property 1538 * 1539 * @return {@code true} if 'length' property is non-writable 1540 */ 1541 public boolean isLengthNotWritable() { 1542 return (flags & IS_LENGTH_NOT_WRITABLE) != 0; 1543 } 1544 1545 /** 1546 * Flag this object as having non-writable length property. 1547 */ 1548 public void setIsLengthNotWritable() { 1549 flags |= IS_LENGTH_NOT_WRITABLE; 1550 } 1551 1552 /** 1553 * Get the {@link ArrayData}, for this ScriptObject, ensuring it is of a type 1554 * that can handle elementType 1555 * @param elementType elementType 1556 * @return array data 1557 */ 1558 public final ArrayData getArray(final Class<?> elementType) { 1559 if (elementType == null) { 1560 return arrayData; 1561 } 1562 final ArrayData newArrayData = arrayData.convert(elementType); 1563 if (newArrayData != arrayData) { 1564 arrayData = newArrayData; 1565 } 1566 return newArrayData; 1567 } 1568 1569 /** 1570 * Get the {@link ArrayData} for this ScriptObject if it is an array 1571 * @return array data 1572 */ 1573 public final ArrayData getArray() { 1574 return arrayData; 1575 } 1576 1577 /** 1578 * Set the {@link ArrayData} for this ScriptObject if it is to be an array 1579 * @param arrayData the array data 1580 */ 1581 public final void setArray(final ArrayData arrayData) { 1582 this.arrayData = arrayData; 1583 } 1584 1585 /** 1586 * Check if this ScriptObject is extensible 1587 * @return true if extensible 1588 */ 1589 public boolean isExtensible() { 1590 return getMap().isExtensible(); 1591 } 1592 1593 /** 1594 * ECMAScript 15.2.3.8 - seal implementation 1595 * @return the sealed ScriptObject 1596 */ 1597 public ScriptObject seal() { 1598 PropertyMap oldMap = getMap(); 1599 1600 while (true) { 1601 final PropertyMap newMap = getMap().seal(); 1602 1603 if (!compareAndSetMap(oldMap, newMap)) { 1604 oldMap = getMap(); 1605 } else { 1606 setArray(ArrayData.seal(getArray())); 1607 return this; 1608 } 1609 } 1610 } 1611 1612 /** 1613 * Check whether this ScriptObject is sealed 1614 * @return true if sealed 1615 */ 1616 public boolean isSealed() { 1617 return getMap().isSealed(); 1618 } 1619 1620 /** 1621 * ECMA 15.2.39 - freeze implementation. Freeze this ScriptObject 1622 * @return the frozen ScriptObject 1623 */ 1624 public ScriptObject freeze() { 1625 PropertyMap oldMap = getMap(); 1626 1627 while (true) { 1628 final PropertyMap newMap = getMap().freeze(); 1629 1630 if (!compareAndSetMap(oldMap, newMap)) { 1631 oldMap = getMap(); 1632 } else { 1633 setArray(ArrayData.freeze(getArray())); 1634 return this; 1635 } 1636 } 1637 } 1638 1639 /** 1640 * Check whether this ScriptObject is frozen 1641 * @return true if frozen 1642 */ 1643 public boolean isFrozen() { 1644 return getMap().isFrozen(); 1645 } 1646 1647 /** 1648 * Check whether this ScriptObject is scope 1649 * @return true if scope 1650 */ 1651 public boolean isScope() { 1652 return false; 1653 } 1654 1655 /** 1656 * Tag this script object as built in 1657 */ 1658 public final void setIsBuiltin() { 1659 flags |= IS_BUILTIN; 1660 } 1661 1662 /** 1663 * Check if this script object is built in 1664 * @return true if build in 1665 */ 1666 public final boolean isBuiltin() { 1667 return (flags & IS_BUILTIN) != 0; 1668 } 1669 1670 /** 1671 * Clears the properties from a ScriptObject 1672 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1673 * 1674 * @param strict strict mode or not 1675 */ 1676 public void clear(final boolean strict) { 1677 final Iterator<String> iter = propertyIterator(); 1678 while (iter.hasNext()) { 1679 delete(iter.next(), strict); 1680 } 1681 } 1682 1683 /** 1684 * Checks if a property with a given key is present in a ScriptObject 1685 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1686 * 1687 * @param key the key to check for 1688 * @return true if a property with the given key exists, false otherwise 1689 */ 1690 public boolean containsKey(final Object key) { 1691 return has(key); 1692 } 1693 1694 /** 1695 * Checks if a property with a given value is present in a ScriptObject 1696 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1697 * 1698 * @param value value to check for 1699 * @return true if a property with the given value exists, false otherwise 1700 */ 1701 public boolean containsValue(final Object value) { 1702 final Iterator<Object> iter = valueIterator(); 1703 while (iter.hasNext()) { 1704 if (iter.next().equals(value)) { 1705 return true; 1706 } 1707 } 1708 return false; 1709 } 1710 1711 /** 1712 * Returns the set of {@literal <property, value>} entries that make up this 1713 * ScriptObject's properties 1714 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1715 * 1716 * @return an entry set of all the properties in this object 1717 */ 1718 public Set<Map.Entry<Object, Object>> entrySet() { 1719 final Iterator<String> iter = propertyIterator(); 1720 final Set<Map.Entry<Object, Object>> entries = new HashSet<>(); 1721 while (iter.hasNext()) { 1722 final Object key = iter.next(); 1723 entries.add(new AbstractMap.SimpleImmutableEntry<>(key, get(key))); 1724 } 1725 return Collections.unmodifiableSet(entries); 1726 } 1727 1728 /** 1729 * Check whether a ScriptObject contains no properties 1730 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1731 * 1732 * @return true if object has no properties 1733 */ 1734 public boolean isEmpty() { 1735 return !propertyIterator().hasNext(); 1736 } 1737 1738 /** 1739 * Return the set of keys (property names) for all properties 1740 * in this ScriptObject 1741 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1742 * 1743 * @return keySet of this ScriptObject 1744 */ 1745 public Set<Object> keySet() { 1746 final Iterator<String> iter = propertyIterator(); 1747 final Set<Object> keySet = new HashSet<>(); 1748 while (iter.hasNext()) { 1749 keySet.add(iter.next()); 1750 } 1751 return Collections.unmodifiableSet(keySet); 1752 } 1753 1754 /** 1755 * Put a property in the ScriptObject 1756 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1757 * 1758 * @param key property key 1759 * @param value property value 1760 * @param strict strict mode or not 1761 * @return oldValue if property with same key existed already 1762 */ 1763 public Object put(final Object key, final Object value, final boolean strict) { 1764 final Object oldValue = get(key); 1765 final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0; 1766 set(key, value, scriptObjectFlags); 1767 return oldValue; 1768 } 1769 1770 /** 1771 * Put several properties in the ScriptObject given a mapping 1772 * of their keys to their values 1773 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1774 * 1775 * @param otherMap a {@literal <key,value>} map of properties to add 1776 * @param strict strict mode or not 1777 */ 1778 public void putAll(final Map<?, ?> otherMap, final boolean strict) { 1779 final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0; 1780 for (final Map.Entry<?, ?> entry : otherMap.entrySet()) { 1781 set(entry.getKey(), entry.getValue(), scriptObjectFlags); 1782 } 1783 } 1784 1785 /** 1786 * Remove a property from the ScriptObject. 1787 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1788 * 1789 * @param key the key of the property 1790 * @param strict strict mode or not 1791 * @return the oldValue of the removed property 1792 */ 1793 public Object remove(final Object key, final boolean strict) { 1794 final Object oldValue = get(key); 1795 delete(key, strict); 1796 return oldValue; 1797 } 1798 1799 /** 1800 * Return the size of the ScriptObject - i.e. the number of properties 1801 * it contains 1802 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1803 * 1804 * @return number of properties in ScriptObject 1805 */ 1806 public int size() { 1807 int n = 0; 1808 for (final Iterator<String> iter = propertyIterator(); iter.hasNext(); iter.next()) { 1809 n++; 1810 } 1811 return n; 1812 } 1813 1814 /** 1815 * Return the values of the properties in the ScriptObject 1816 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1817 * 1818 * @return collection of values for the properties in this ScriptObject 1819 */ 1820 public Collection<Object> values() { 1821 final List<Object> values = new ArrayList<>(size()); 1822 final Iterator<Object> iter = valueIterator(); 1823 while (iter.hasNext()) { 1824 values.add(iter.next()); 1825 } 1826 return Collections.unmodifiableList(values); 1827 } 1828 1829 /** 1830 * Lookup method that, given a CallSiteDescriptor, looks up the target 1831 * MethodHandle and creates a GuardedInvocation 1832 * with the appropriate guard(s). 1833 * 1834 * @param desc call site descriptor 1835 * @param request the link request 1836 * 1837 * @return GuardedInvocation for the callsite 1838 */ 1839 public GuardedInvocation lookup(final CallSiteDescriptor desc, final LinkRequest request) { 1840 final int c = desc.getNameTokenCount(); 1841 // JavaScript is "immune" to all currently defined Dynalink composite operation - getProp is the same as getElem 1842 // is the same as getMethod as JavaScript objects have a single namespace for all three. Therefore, we don't 1843 // care about them, and just link to whatever is the first operation. 1844 final String operator = CallSiteDescriptorFactory.tokenizeOperators(desc).get(0); 1845 // NOTE: we support getElem and setItem as JavaScript doesn't distinguish items from properties. Nashorn itself 1846 // emits "dyn:getProp:identifier" for "<expr>.<identifier>" and "dyn:getElem" for "<expr>[<expr>]", but we are 1847 // more flexible here and dispatch not on operation name (getProp vs. getElem), but rather on whether the 1848 // operation has an associated name or not. 1849 switch (operator) { 1850 case "getProp": 1851 case "getElem": 1852 case "getMethod": 1853 return c > 2 ? findGetMethod(desc, request, operator) : findGetIndexMethod(desc, request); 1854 case "setProp": 1855 case "setElem": 1856 return c > 2 ? findSetMethod(desc, request) : findSetIndexMethod(desc, request); 1857 case "call": 1858 return findCallMethod(desc, request); 1859 case "new": 1860 return findNewMethod(desc, request); 1861 case "callMethod": 1862 return findCallMethodMethod(desc, request); 1863 default: 1864 return null; 1865 } 1866 } 1867 1868 /** 1869 * Find the appropriate New method for an invoke dynamic call. 1870 * 1871 * @param desc The invoke dynamic call site descriptor. 1872 * @param request The link request 1873 * 1874 * @return GuardedInvocation to be invoked at call site. 1875 */ 1876 protected GuardedInvocation findNewMethod(final CallSiteDescriptor desc, final LinkRequest request) { 1877 return notAFunction(desc); 1878 } 1879 1880 /** 1881 * Find the appropriate CALL method for an invoke dynamic call. 1882 * This generates "not a function" always 1883 * 1884 * @param desc the call site descriptor. 1885 * @param request the link request 1886 * 1887 * @return GuardedInvocation to be invoked at call site. 1888 */ 1889 protected GuardedInvocation findCallMethod(final CallSiteDescriptor desc, final LinkRequest request) { 1890 return notAFunction(desc); 1891 } 1892 1893 private GuardedInvocation notAFunction(final CallSiteDescriptor desc) { 1894 throw typeError("not.a.function", NashornCallSiteDescriptor.getFunctionErrorMessage(desc, this)); 1895 } 1896 1897 /** 1898 * Find an implementation for a "dyn:callMethod" operation. Note that Nashorn internally never uses 1899 * "dyn:callMethod", but instead always emits two call sites in bytecode, one for "dyn:getMethod", and then another 1900 * one for "dyn:call". Explicit support for "dyn:callMethod" is provided for the benefit of potential external 1901 * callers. The implementation itself actually folds a "dyn:getMethod" method handle into a "dyn:call" method handle. 1902 * 1903 * @param desc the call site descriptor. 1904 * @param request the link request 1905 * 1906 * @return GuardedInvocation to be invoked at call site. 1907 */ 1908 protected GuardedInvocation findCallMethodMethod(final CallSiteDescriptor desc, final LinkRequest request) { 1909 // R(P0, P1, ...) 1910 final MethodType callType = desc.getMethodType(); 1911 // use type Object(P0) for the getter 1912 final CallSiteDescriptor getterType = desc.changeMethodType(MethodType.methodType(Object.class, callType.parameterType(0))); 1913 final GuardedInvocation getter = findGetMethod(getterType, request, "getMethod"); 1914 1915 // Object(P0) => Object(P0, P1, ...) 1916 final MethodHandle argDroppingGetter = MH.dropArguments(getter.getInvocation(), 1, callType.parameterList().subList(1, callType.parameterCount())); 1917 // R(Object, P0, P1, ...) 1918 final MethodHandle invoker = Bootstrap.createDynamicInvoker("dyn:call", callType.insertParameterTypes(0, argDroppingGetter.type().returnType())); 1919 // Fold Object(P0, P1, ...) into R(Object, P0, P1, ...) => R(P0, P1, ...) 1920 return getter.replaceMethods(MH.foldArguments(invoker, argDroppingGetter), getter.getGuard()); 1921 } 1922 1923 /** 1924 * Test whether this object contains in its prototype chain or is itself a with-object. 1925 * @return true if a with-object was found 1926 */ 1927 boolean hasWithScope() { 1928 return false; 1929 } 1930 1931 /** 1932 * Add a filter to the first argument of {@code methodHandle} that calls its {@link #getProto()} method 1933 * {@code depth} times. 1934 * @param methodHandle a method handle 1935 * @param depth distance to target prototype 1936 * @return the filtered method handle 1937 */ 1938 static MethodHandle addProtoFilter(final MethodHandle methodHandle, final int depth) { 1939 if (depth == 0) { 1940 return methodHandle; 1941 } 1942 final int listIndex = depth - 1; // We don't need 0-deep walker 1943 MethodHandle filter = listIndex < PROTO_FILTERS.size() ? PROTO_FILTERS.get(listIndex) : null; 1944 1945 if (filter == null) { 1946 filter = addProtoFilter(GETPROTO, depth - 1); 1947 PROTO_FILTERS.add(null); 1948 PROTO_FILTERS.set(listIndex, filter); 1949 } 1950 1951 return MH.filterArguments(methodHandle, 0, filter.asType(filter.type().changeReturnType(methodHandle.type().parameterType(0)))); 1952 } 1953 1954 /** 1955 * Find the appropriate GET method for an invoke dynamic call. 1956 * 1957 * @param desc the call site descriptor 1958 * @param request the link request 1959 * @param operator operator for get: getProp, getMethod, getElem etc 1960 * 1961 * @return GuardedInvocation to be invoked at call site. 1962 */ 1963 protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) { 1964 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 1965 1966 String name; 1967 name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 1968 if (NashornCallSiteDescriptor.isApplyToCall(desc)) { 1969 if (Global.isBuiltinFunctionPrototypeApply()) { 1970 name = "call"; 1971 } 1972 } 1973 1974 if (request.isCallSiteUnstable() || hasWithScope()) { 1975 return findMegaMorphicGetMethod(desc, name, "getMethod".equals(operator)); 1976 } 1977 1978 final FindProperty find = findProperty(name, true); 1979 MethodHandle mh; 1980 1981 if (find == null) { 1982 switch (operator) { 1983 case "getElem": // getElem only gets here if element name is constant, so treat it like a property access 1984 case "getProp": 1985 return noSuchProperty(desc, request); 1986 case "getMethod": 1987 return noSuchMethod(desc, request); 1988 default: 1989 throw new AssertionError(operator); // never invoked with any other operation 1990 } 1991 } 1992 1993 final GlobalConstants globalConstants = getGlobalConstants(); 1994 if (globalConstants != null) { 1995 final GuardedInvocation cinv = globalConstants.findGetMethod(find, this, desc); 1996 if (cinv != null) { 1997 return cinv; 1998 } 1999 } 2000 2001 final Class<?> returnType = desc.getMethodType().returnType(); 2002 final Property property = find.getProperty(); 2003 2004 final int programPoint = NashornCallSiteDescriptor.isOptimistic(desc) ? 2005 NashornCallSiteDescriptor.getProgramPoint(desc) : 2006 UnwarrantedOptimismException.INVALID_PROGRAM_POINT; 2007 2008 mh = find.getGetter(returnType, programPoint, request); 2009 // Get the appropriate guard for this callsite and property. 2010 final MethodHandle guard = NashornGuards.getGuard(this, property, desc, explicitInstanceOfCheck); 2011 final ScriptObject owner = find.getOwner(); 2012 final Class<ClassCastException> exception = explicitInstanceOfCheck ? null : ClassCastException.class; 2013 2014 final SwitchPoint protoSwitchPoint; 2015 2016 if (mh == null) { 2017 mh = Lookup.emptyGetter(returnType); 2018 protoSwitchPoint = getProtoSwitchPoint(name, owner); 2019 } else if (!find.isSelf()) { 2020 assert mh.type().returnType().equals(returnType) : 2021 "return type mismatch for getter " + mh.type().returnType() + " != " + returnType; 2022 if (!(property instanceof UserAccessorProperty)) { 2023 // Add a filter that replaces the self object with the prototype owning the property. 2024 mh = addProtoFilter(mh, find.getProtoChainLength()); 2025 } 2026 protoSwitchPoint = getProtoSwitchPoint(name, owner); 2027 } else { 2028 protoSwitchPoint = null; 2029 } 2030 2031 final GuardedInvocation inv = new GuardedInvocation(mh, guard, protoSwitchPoint, exception); 2032 return inv.addSwitchPoint(findBuiltinSwitchPoint(name)); 2033 } 2034 2035 private static GuardedInvocation findMegaMorphicGetMethod(final CallSiteDescriptor desc, final String name, final boolean isMethod) { 2036 Context.getContextTrusted().getLogger(ObjectClassGenerator.class).warning("Megamorphic getter: " + desc + " " + name + " " +isMethod); 2037 final MethodHandle invoker = MH.insertArguments(MEGAMORPHIC_GET, 1, name, isMethod); 2038 final MethodHandle guard = getScriptObjectGuard(desc.getMethodType(), true); 2039 return new GuardedInvocation(invoker, guard); 2040 } 2041 2042 @SuppressWarnings("unused") 2043 private Object megamorphicGet(final String key, final boolean isMethod) { 2044 final FindProperty find = findProperty(key, true); 2045 if (find != null) { 2046 return find.getObjectValue(); 2047 } 2048 2049 return isMethod ? getNoSuchMethod(key, INVALID_PROGRAM_POINT) : invokeNoSuchProperty(key, INVALID_PROGRAM_POINT); 2050 } 2051 2052 // Marks a property as declared and sets its value. Used as slow path for block-scoped LET and CONST 2053 @SuppressWarnings("unused") 2054 private void declareAndSet(final String key, final Object value) { 2055 final PropertyMap oldMap = getMap(); 2056 final FindProperty find = findProperty(key, false); 2057 assert find != null; 2058 2059 final Property property = find.getProperty(); 2060 assert property != null; 2061 assert property.needsDeclaration(); 2062 2063 final PropertyMap newMap = oldMap.replaceProperty(property, property.removeFlags(Property.NEEDS_DECLARATION)); 2064 setMap(newMap); 2065 set(key, value, 0); 2066 } 2067 2068 /** 2069 * Find the appropriate GETINDEX method for an invoke dynamic call. 2070 * 2071 * @param desc the call site descriptor 2072 * @param request the link request 2073 * 2074 * @return GuardedInvocation to be invoked at call site. 2075 */ 2076 protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2077 final MethodType callType = desc.getMethodType(); 2078 final Class<?> returnType = callType.returnType(); 2079 final Class<?> returnClass = returnType.isPrimitive() ? returnType : Object.class; 2080 final Class<?> keyClass = callType.parameterType(1); 2081 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 2082 2083 final String name; 2084 if (returnClass.isPrimitive()) { 2085 //turn e.g. get with a double into getDouble 2086 final String returnTypeName = returnClass.getName(); 2087 name = "get" + Character.toUpperCase(returnTypeName.charAt(0)) + returnTypeName.substring(1, returnTypeName.length()); 2088 } else { 2089 name = "get"; 2090 } 2091 2092 final MethodHandle mh = findGetIndexMethodHandle(returnClass, name, keyClass, desc); 2093 return new GuardedInvocation(mh, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class); 2094 } 2095 2096 private static MethodHandle getScriptObjectGuard(final MethodType type, final boolean explicitInstanceOfCheck) { 2097 return ScriptObject.class.isAssignableFrom(type.parameterType(0)) ? null : NashornGuards.getScriptObjectGuard(explicitInstanceOfCheck); 2098 } 2099 2100 /** 2101 * Find a handle for a getIndex method 2102 * @param returnType return type for getter 2103 * @param name name 2104 * @param elementType index type for getter 2105 * @param desc call site descriptor 2106 * @return method handle for getter 2107 */ 2108 protected MethodHandle findGetIndexMethodHandle(final Class<?> returnType, final String name, final Class<?> elementType, final CallSiteDescriptor desc) { 2109 if (!returnType.isPrimitive()) { 2110 return findOwnMH_V(getClass(), name, returnType, elementType); 2111 } 2112 2113 return MH.insertArguments( 2114 findOwnMH_V(getClass(), name, returnType, elementType, int.class), 2115 2, 2116 NashornCallSiteDescriptor.isOptimistic(desc) ? 2117 NashornCallSiteDescriptor.getProgramPoint(desc) : 2118 INVALID_PROGRAM_POINT); 2119 } 2120 2121 /** 2122 * Get a switch point for a property with the given {@code name} that will be invalidated when 2123 * the property definition is changed in this object's prototype chain. Returns {@code null} if 2124 * the property is defined in this object itself. 2125 * 2126 * @param name the property name 2127 * @param owner the property owner, null if property is not defined 2128 * @return a SwitchPoint or null 2129 */ 2130 public final SwitchPoint getProtoSwitchPoint(final String name, final ScriptObject owner) { 2131 if (owner == this || getProto() == null) { 2132 return null; 2133 } 2134 2135 for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) { 2136 final ScriptObject parent = obj.getProto(); 2137 parent.getMap().addListener(name, obj.getMap()); 2138 } 2139 2140 return getMap().getSwitchPoint(name); 2141 } 2142 2143 /** 2144 * Find the appropriate SET method for an invoke dynamic call. 2145 * 2146 * @param desc the call site descriptor 2147 * @param request the link request 2148 * 2149 * @return GuardedInvocation to be invoked at call site. 2150 */ 2151 protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2152 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 2153 2154 if (request.isCallSiteUnstable() || hasWithScope()) { 2155 return findMegaMorphicSetMethod(desc, name); 2156 } 2157 2158 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 2159 2160 /* 2161 * If doing property set on a scope object, we should stop proto search on the first 2162 * non-scope object. Without this, for example, when assigning "toString" on global scope, 2163 * we'll end up assigning it on it's proto - which is Object.prototype.toString !! 2164 * 2165 * toString = function() { print("global toString"); } // don't affect Object.prototype.toString 2166 */ 2167 FindProperty find = findProperty(name, true, this); 2168 2169 // If it's not a scope search, then we don't want any inherited properties except those with user defined accessors. 2170 if (find != null && find.isInherited() && !(find.getProperty() instanceof UserAccessorProperty)) { 2171 // We should still check if inherited data property is not writable 2172 if (isExtensible() && !find.getProperty().isWritable()) { 2173 return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true); 2174 } 2175 // Otherwise, forget the found property unless this is a scope callsite and the owner is a scope object as well. 2176 if (!NashornCallSiteDescriptor.isScope(desc) || !find.getOwner().isScope()) { 2177 find = null; 2178 } 2179 } 2180 2181 if (find != null) { 2182 if (!find.getProperty().isWritable() && !NashornCallSiteDescriptor.isDeclaration(desc)) { 2183 if (NashornCallSiteDescriptor.isScope(desc) && find.getProperty().isLexicalBinding()) { 2184 throw typeError("assign.constant", name); // Overwriting ES6 const should throw also in non-strict mode. 2185 } 2186 // Existing, non-writable property 2187 return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true); 2188 } 2189 } else { 2190 if (!isExtensible()) { 2191 return createEmptySetMethod(desc, explicitInstanceOfCheck, "object.non.extensible", false); 2192 } 2193 } 2194 2195 final GuardedInvocation inv = new SetMethodCreator(this, find, desc, request).createGuardedInvocation(findBuiltinSwitchPoint(name)); 2196 2197 final GlobalConstants globalConstants = getGlobalConstants(); 2198 if (globalConstants != null) { 2199 final GuardedInvocation cinv = globalConstants.findSetMethod(find, this, inv, desc, request); 2200 if (cinv != null) { 2201 return cinv; 2202 } 2203 } 2204 2205 return inv; 2206 } 2207 2208 private GlobalConstants getGlobalConstants() { 2209 // Avoid hitting getContext() which might be costly for a non-Global unless needed. 2210 return GlobalConstants.GLOBAL_ONLY && !isGlobal() ? null : getContext().getGlobalConstants(); 2211 } 2212 2213 private GuardedInvocation createEmptySetMethod(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String strictErrorMessage, final boolean canBeFastScope) { 2214 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 2215 if (NashornCallSiteDescriptor.isStrict(desc)) { 2216 throw typeError(strictErrorMessage, name, ScriptRuntime.safeToString(this)); 2217 } 2218 assert canBeFastScope || !NashornCallSiteDescriptor.isFastScope(desc); 2219 return new GuardedInvocation( 2220 Lookup.EMPTY_SETTER, 2221 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), 2222 getProtoSwitchPoint(name, null), 2223 explicitInstanceOfCheck ? null : ClassCastException.class); 2224 } 2225 2226 @SuppressWarnings("unused") 2227 private boolean extensionCheck(final boolean isStrict, final String name) { 2228 if (isExtensible()) { 2229 return true; //go on and do the set. this is our guard 2230 } else if (isStrict) { 2231 //throw an error for attempting to do the set in strict mode 2232 throw typeError("object.non.extensible", name, ScriptRuntime.safeToString(this)); 2233 } else { 2234 //not extensible, non strict - this is a nop 2235 return false; 2236 } 2237 } 2238 2239 private GuardedInvocation findMegaMorphicSetMethod(final CallSiteDescriptor desc, final String name) { 2240 final MethodType type = desc.getMethodType().insertParameterTypes(1, Object.class); 2241 //never bother with ClassCastExceptionGuard for megamorphic callsites 2242 final GuardedInvocation inv = findSetIndexMethod(getClass(), desc, false, type); 2243 return inv.replaceMethods(MH.insertArguments(inv.getInvocation(), 1, name), inv.getGuard()); 2244 } 2245 2246 @SuppressWarnings("unused") 2247 private static Object globalFilter(final Object object) { 2248 ScriptObject sobj = (ScriptObject) object; 2249 while (sobj != null && !(sobj instanceof Global)) { 2250 sobj = sobj.getProto(); 2251 } 2252 return sobj; 2253 } 2254 2255 /** 2256 * Lookup function for the set index method, available for subclasses as well, e.g. {@link NativeArray} 2257 * provides special quick accessor linkage for continuous arrays that are represented as Java arrays 2258 * 2259 * @param desc call site descriptor 2260 * @param request link request 2261 * 2262 * @return GuardedInvocation to be invoked at call site. 2263 */ 2264 protected GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) { // array, index, value 2265 return findSetIndexMethod(getClass(), desc, explicitInstanceOfCheck(desc, request), desc.getMethodType()); 2266 } 2267 2268 /** 2269 * Find the appropriate SETINDEX method for an invoke dynamic call. 2270 * 2271 * @param clazz the receiver class 2272 * @param desc the call site descriptor 2273 * @param explicitInstanceOfCheck add an explicit instanceof check? 2274 * @param callType the method type at the call site 2275 * 2276 * @return GuardedInvocation to be invoked at call site. 2277 */ 2278 private static GuardedInvocation findSetIndexMethod(final Class<? extends ScriptObject> clazz, final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final MethodType callType) { 2279 assert callType.parameterCount() == 3; 2280 final Class<?> keyClass = callType.parameterType(1); 2281 final Class<?> valueClass = callType.parameterType(2); 2282 2283 MethodHandle methodHandle = findOwnMH_V(clazz, "set", void.class, keyClass, valueClass, int.class); 2284 methodHandle = MH.insertArguments(methodHandle, 3, NashornCallSiteDescriptor.getFlags(desc)); 2285 2286 return new GuardedInvocation(methodHandle, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class); 2287 } 2288 2289 /** 2290 * Fall back if a function property is not found. 2291 * @param desc The call site descriptor 2292 * @param request the link request 2293 * @return GuardedInvocation to be invoked at call site. 2294 */ 2295 public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2296 final String name = desc.getNameToken(2); 2297 final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true); 2298 final boolean scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc); 2299 2300 if (find == null) { 2301 return noSuchProperty(desc, request); 2302 } 2303 2304 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 2305 2306 final Object value = find.getObjectValue(); 2307 if (!(value instanceof ScriptFunction)) { 2308 return createEmptyGetter(desc, explicitInstanceOfCheck, name); 2309 } 2310 2311 final ScriptFunction func = (ScriptFunction)value; 2312 final Object thiz = scopeCall && func.isStrict() ? UNDEFINED : this; 2313 // TODO: It'd be awesome if we could bind "name" without binding "this". 2314 // Since we're binding this we must use an identity guard here. 2315 return new GuardedInvocation( 2316 MH.dropArguments( 2317 MH.constant( 2318 ScriptFunction.class, 2319 func.makeBoundFunction(thiz, new Object[] { name })), 2320 0, 2321 Object.class), 2322 NashornGuards.combineGuards( 2323 NashornGuards.getIdentityGuard(this), 2324 NashornGuards.getMapGuard(getMap(), true))); 2325 } 2326 2327 /** 2328 * Fall back if a property is not found. 2329 * @param desc the call site descriptor. 2330 * @param request the link request 2331 * @return GuardedInvocation to be invoked at call site. 2332 */ 2333 public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) { 2334 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 2335 final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true); 2336 final boolean scopeAccess = isScope() && NashornCallSiteDescriptor.isScope(desc); 2337 2338 if (find != null) { 2339 final Object value = find.getObjectValue(); 2340 ScriptFunction func = null; 2341 MethodHandle mh = null; 2342 2343 if (value instanceof ScriptFunction) { 2344 func = (ScriptFunction)value; 2345 mh = getCallMethodHandle(func, desc.getMethodType(), name); 2346 } 2347 2348 if (mh != null) { 2349 assert func != null; 2350 if (scopeAccess && func.isStrict()) { 2351 mh = bindTo(mh, UNDEFINED); 2352 } 2353 2354 return new GuardedInvocation( 2355 mh, 2356 find.isSelf()? 2357 getKnownFunctionPropertyGuardSelf( 2358 getMap(), 2359 find.getGetter(Object.class, INVALID_PROGRAM_POINT, request), 2360 func) 2361 : 2362 //TODO this always does a scriptobject check 2363 getKnownFunctionPropertyGuardProto( 2364 getMap(), 2365 find.getGetter(Object.class, INVALID_PROGRAM_POINT, request), 2366 find.getProtoChainLength(), 2367 func), 2368 getProtoSwitchPoint(NO_SUCH_PROPERTY_NAME, find.getOwner()), 2369 //TODO this doesn't need a ClassCastException as guard always checks script object 2370 null); 2371 } 2372 } 2373 2374 if (scopeAccess) { 2375 throw referenceError("not.defined", name); 2376 } 2377 2378 return createEmptyGetter(desc, explicitInstanceOfCheck(desc, request), name); 2379 } 2380 2381 /** 2382 * Invoke fall back if a property is not found. 2383 * @param name Name of property. 2384 * @param programPoint program point 2385 * @return Result from call. 2386 */ 2387 protected Object invokeNoSuchProperty(final String name, final int programPoint) { 2388 final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true); 2389 2390 Object ret = UNDEFINED; 2391 2392 if (find != null) { 2393 final Object func = find.getObjectValue(); 2394 2395 if (func instanceof ScriptFunction) { 2396 ret = ScriptRuntime.apply((ScriptFunction)func, this, name); 2397 } 2398 } 2399 2400 if (isValid(programPoint)) { 2401 throw new UnwarrantedOptimismException(ret, programPoint); 2402 } 2403 2404 return ret; 2405 } 2406 2407 2408 /** 2409 * Get __noSuchMethod__ as a function bound to this object and {@code name} if it is defined. 2410 * @param name the method name 2411 * @return the bound function, or undefined 2412 */ 2413 private Object getNoSuchMethod(final String name, final int programPoint) { 2414 final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true); 2415 2416 if (find == null) { 2417 return invokeNoSuchProperty(name, programPoint); 2418 } 2419 2420 final Object value = find.getObjectValue(); 2421 if (!(value instanceof ScriptFunction)) { 2422 return UNDEFINED; 2423 } 2424 2425 return ((ScriptFunction)value).makeBoundFunction(this, new Object[] {name}); 2426 } 2427 2428 private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) { 2429 if (NashornCallSiteDescriptor.isOptimistic(desc)) { 2430 throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT); 2431 } 2432 2433 return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()), 2434 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoint(name, null), 2435 explicitInstanceOfCheck ? null : ClassCastException.class); 2436 } 2437 2438 private abstract static class ScriptObjectIterator <T extends Object> implements Iterator<T> { 2439 protected T[] values; 2440 protected final ScriptObject object; 2441 private int index; 2442 2443 ScriptObjectIterator(final ScriptObject object) { 2444 this.object = object; 2445 } 2446 2447 protected abstract void init(); 2448 2449 @Override 2450 public boolean hasNext() { 2451 if (values == null) { 2452 init(); 2453 } 2454 return index < values.length; 2455 } 2456 2457 @Override 2458 public T next() { 2459 if (values == null) { 2460 init(); 2461 } 2462 return values[index++]; 2463 } 2464 2465 @Override 2466 public void remove() { 2467 throw new UnsupportedOperationException("remove"); 2468 } 2469 } 2470 2471 private static class KeyIterator extends ScriptObjectIterator<String> { 2472 KeyIterator(final ScriptObject object) { 2473 super(object); 2474 } 2475 2476 @Override 2477 protected void init() { 2478 final Set<String> keys = new LinkedHashSet<>(); 2479 final Set<String> nonEnumerable = new HashSet<>(); 2480 for (ScriptObject self = object; self != null; self = self.getProto()) { 2481 keys.addAll(Arrays.asList(self.getOwnKeys(false, nonEnumerable))); 2482 } 2483 this.values = keys.toArray(new String[keys.size()]); 2484 } 2485 } 2486 2487 private static class ValueIterator extends ScriptObjectIterator<Object> { 2488 ValueIterator(final ScriptObject object) { 2489 super(object); 2490 } 2491 2492 @Override 2493 protected void init() { 2494 final ArrayList<Object> valueList = new ArrayList<>(); 2495 final Set<String> nonEnumerable = new HashSet<>(); 2496 for (ScriptObject self = object; self != null; self = self.getProto()) { 2497 for (final String key : self.getOwnKeys(false, nonEnumerable)) { 2498 valueList.add(self.get(key)); 2499 } 2500 } 2501 this.values = valueList.toArray(new Object[valueList.size()]); 2502 } 2503 } 2504 2505 /** 2506 * Add a spill property for the given key. 2507 * @param key Property key. 2508 * @param flags Property flags. 2509 * @return Added property. 2510 */ 2511 private Property addSpillProperty(final String key, final int flags, final Object value, final boolean hasInitialValue) { 2512 final PropertyMap propertyMap = getMap(); 2513 final int fieldSlot = propertyMap.getFreeFieldSlot(); 2514 final int propertyFlags = flags | (useDualFields() ? Property.DUAL_FIELDS : 0); 2515 2516 Property property; 2517 if (fieldSlot > -1) { 2518 property = hasInitialValue ? 2519 new AccessorProperty(key, propertyFlags, fieldSlot, this, value) : 2520 new AccessorProperty(key, propertyFlags, getClass(), fieldSlot); 2521 property = addOwnProperty(property); 2522 } else { 2523 final int spillSlot = propertyMap.getFreeSpillSlot(); 2524 property = hasInitialValue ? 2525 new SpillProperty(key, propertyFlags, spillSlot, this, value) : 2526 new SpillProperty(key, propertyFlags, spillSlot); 2527 property = addOwnProperty(property); 2528 ensureSpillSize(property.getSlot()); 2529 } 2530 return property; 2531 } 2532 2533 /** 2534 * Add a spill entry for the given key. 2535 * @param key Property key. 2536 * @return Setter method handle. 2537 */ 2538 MethodHandle addSpill(final Class<?> type, final String key) { 2539 return addSpillProperty(key, 0, null, false).getSetter(type, getMap()); 2540 } 2541 2542 /** 2543 * Make sure arguments are paired correctly, with respect to more parameters than declared, 2544 * fewer parameters than declared and other things that JavaScript allows. This might involve 2545 * creating collectors. 2546 * 2547 * @param methodHandle method handle for invoke 2548 * @param callType type of the call 2549 * 2550 * @return method handle with adjusted arguments 2551 */ 2552 protected static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType) { 2553 return pairArguments(methodHandle, callType, null); 2554 } 2555 2556 /** 2557 * Make sure arguments are paired correctly, with respect to more parameters than declared, 2558 * fewer parameters than declared and other things that JavaScript allows. This might involve 2559 * creating collectors. 2560 * 2561 * Make sure arguments are paired correctly. 2562 * @param methodHandle MethodHandle to adjust. 2563 * @param callType MethodType of the call site. 2564 * @param callerVarArg true if the caller is vararg, false otherwise, null if it should be inferred from the 2565 * {@code callType}; basically, if the last parameter type of the call site is an array, it'll be considered a 2566 * variable arity call site. These are ordinarily rare; Nashorn code generator creates variable arity call sites 2567 * when the call has more than {@link LinkerCallSite#ARGLIMIT} parameters. 2568 * 2569 * @return method handle with adjusted arguments 2570 */ 2571 public static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType, final Boolean callerVarArg) { 2572 final MethodType methodType = methodHandle.type(); 2573 if (methodType.equals(callType.changeReturnType(methodType.returnType()))) { 2574 return methodHandle; 2575 } 2576 2577 final int parameterCount = methodType.parameterCount(); 2578 final int callCount = callType.parameterCount(); 2579 2580 final boolean isCalleeVarArg = parameterCount > 0 && methodType.parameterType(parameterCount - 1).isArray(); 2581 final boolean isCallerVarArg = callerVarArg != null ? callerVarArg : callCount > 0 && 2582 callType.parameterType(callCount - 1).isArray(); 2583 2584 if (isCalleeVarArg) { 2585 return isCallerVarArg ? 2586 methodHandle : 2587 MH.asCollector(methodHandle, Object[].class, callCount - parameterCount + 1); 2588 } 2589 2590 if (isCallerVarArg) { 2591 return adaptHandleToVarArgCallSite(methodHandle, callCount); 2592 } 2593 2594 if (callCount < parameterCount) { 2595 final int missingArgs = parameterCount - callCount; 2596 final Object[] fillers = new Object[missingArgs]; 2597 2598 Arrays.fill(fillers, UNDEFINED); 2599 2600 if (isCalleeVarArg) { 2601 fillers[missingArgs - 1] = ScriptRuntime.EMPTY_ARRAY; 2602 } 2603 2604 return MH.insertArguments( 2605 methodHandle, 2606 parameterCount - missingArgs, 2607 fillers); 2608 } 2609 2610 if (callCount > parameterCount) { 2611 final int discardedArgs = callCount - parameterCount; 2612 2613 final Class<?>[] discards = new Class<?>[discardedArgs]; 2614 Arrays.fill(discards, Object.class); 2615 2616 return MH.dropArguments(methodHandle, callCount - discardedArgs, discards); 2617 } 2618 2619 return methodHandle; 2620 } 2621 2622 static MethodHandle adaptHandleToVarArgCallSite(final MethodHandle mh, final int callSiteParamCount) { 2623 final int spreadArgs = mh.type().parameterCount() - callSiteParamCount + 1; 2624 return MH.filterArguments( 2625 MH.asSpreader( 2626 mh, 2627 Object[].class, 2628 spreadArgs), 2629 callSiteParamCount - 1, 2630 MH.insertArguments( 2631 TRUNCATINGFILTER, 2632 0, 2633 spreadArgs) 2634 ); 2635 } 2636 2637 @SuppressWarnings("unused") 2638 private static Object[] truncatingFilter(final int n, final Object[] array) { 2639 final int length = array == null ? 0 : array.length; 2640 if (n == length) { 2641 return array == null ? ScriptRuntime.EMPTY_ARRAY : array; 2642 } 2643 2644 final Object[] newArray = new Object[n]; 2645 2646 if (array != null) { 2647 System.arraycopy(array, 0, newArray, 0, Math.min(n, length)); 2648 } 2649 2650 if (length < n) { 2651 final Object fill = UNDEFINED; 2652 2653 for (int i = length; i < n; i++) { 2654 newArray[i] = fill; 2655 } 2656 } 2657 2658 return newArray; 2659 } 2660 2661 /** 2662 * Numeric length setter for length property 2663 * 2664 * @param newLength new length to set 2665 */ 2666 public final void setLength(final long newLength) { 2667 ArrayData data = getArray(); 2668 final long arrayLength = data.length(); 2669 if (newLength == arrayLength) { 2670 return; 2671 } 2672 2673 if (newLength > arrayLength) { 2674 data = data.ensure(newLength - 1); 2675 if (data.canDelete(arrayLength, newLength - 1, false)) { 2676 data = data.delete(arrayLength, newLength - 1); 2677 } 2678 setArray(data); 2679 return; 2680 } 2681 2682 if (newLength < arrayLength) { 2683 long actualLength = newLength; 2684 2685 // Check for numeric keys in property map and delete them or adjust length, depending on whether 2686 // they're defined as configurable. See ES5 #15.4.5.2 2687 if (getMap().containsArrayKeys()) { 2688 2689 for (long l = arrayLength - 1; l >= newLength; l--) { 2690 final FindProperty find = findProperty(JSType.toString(l), false); 2691 2692 if (find != null) { 2693 2694 if (find.getProperty().isConfigurable()) { 2695 deleteOwnProperty(find.getProperty()); 2696 } else { 2697 actualLength = l + 1; 2698 break; 2699 } 2700 } 2701 } 2702 } 2703 2704 setArray(data.shrink(actualLength)); 2705 data.setLength(actualLength); 2706 } 2707 } 2708 2709 private int getInt(final int index, final String key, final int programPoint) { 2710 if (isValidArrayIndex(index)) { 2711 for (ScriptObject object = this; ; ) { 2712 if (object.getMap().containsArrayKeys()) { 2713 final FindProperty find = object.findProperty(key, false, this); 2714 2715 if (find != null) { 2716 return getIntValue(find, programPoint); 2717 } 2718 } 2719 2720 if ((object = object.getProto()) == null) { 2721 break; 2722 } 2723 2724 final ArrayData array = object.getArray(); 2725 2726 if (array.has(index)) { 2727 return isValid(programPoint) ? 2728 array.getIntOptimistic(index, programPoint) : 2729 array.getInt(index); 2730 } 2731 } 2732 } else { 2733 final FindProperty find = findProperty(key, true); 2734 2735 if (find != null) { 2736 return getIntValue(find, programPoint); 2737 } 2738 } 2739 2740 return JSType.toInt32(invokeNoSuchProperty(key, programPoint)); 2741 } 2742 2743 @Override 2744 public int getInt(final Object key, final int programPoint) { 2745 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2746 final int index = getArrayIndex(primitiveKey); 2747 final ArrayData array = getArray(); 2748 2749 if (array.has(index)) { 2750 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index); 2751 } 2752 2753 return getInt(index, JSType.toString(primitiveKey), programPoint); 2754 } 2755 2756 @Override 2757 public int getInt(final double key, final int programPoint) { 2758 final int index = getArrayIndex(key); 2759 final ArrayData array = getArray(); 2760 2761 if (array.has(index)) { 2762 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index); 2763 } 2764 2765 return getInt(index, JSType.toString(key), programPoint); 2766 } 2767 2768 @Override 2769 public int getInt(final long key, final int programPoint) { 2770 final int index = getArrayIndex(key); 2771 final ArrayData array = getArray(); 2772 2773 if (array.has(index)) { 2774 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index); 2775 } 2776 2777 return getInt(index, JSType.toString(key), programPoint); 2778 } 2779 2780 @Override 2781 public int getInt(final int key, final int programPoint) { 2782 final int index = getArrayIndex(key); 2783 final ArrayData array = getArray(); 2784 2785 if (array.has(index)) { 2786 return isValid(programPoint) ? array.getIntOptimistic(key, programPoint) : array.getInt(key); 2787 } 2788 2789 return getInt(index, JSType.toString(key), programPoint); 2790 } 2791 2792 private long getLong(final int index, final String key, final int programPoint) { 2793 if (isValidArrayIndex(index)) { 2794 for (ScriptObject object = this; ; ) { 2795 if (object.getMap().containsArrayKeys()) { 2796 final FindProperty find = object.findProperty(key, false, this); 2797 if (find != null) { 2798 return getLongValue(find, programPoint); 2799 } 2800 } 2801 2802 if ((object = object.getProto()) == null) { 2803 break; 2804 } 2805 2806 final ArrayData array = object.getArray(); 2807 2808 if (array.has(index)) { 2809 return isValid(programPoint) ? 2810 array.getLongOptimistic(index, programPoint) : 2811 array.getLong(index); 2812 } 2813 } 2814 } else { 2815 final FindProperty find = findProperty(key, true); 2816 2817 if (find != null) { 2818 return getLongValue(find, programPoint); 2819 } 2820 } 2821 2822 return JSType.toLong(invokeNoSuchProperty(key, programPoint)); 2823 } 2824 2825 @Override 2826 public long getLong(final Object key, final int programPoint) { 2827 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2828 final int index = getArrayIndex(primitiveKey); 2829 final ArrayData array = getArray(); 2830 2831 if (array.has(index)) { 2832 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index); 2833 } 2834 2835 return getLong(index, JSType.toString(primitiveKey), programPoint); 2836 } 2837 2838 @Override 2839 public long getLong(final double key, final int programPoint) { 2840 final int index = getArrayIndex(key); 2841 final ArrayData array = getArray(); 2842 2843 if (array.has(index)) { 2844 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index); 2845 } 2846 2847 return getLong(index, JSType.toString(key), programPoint); 2848 } 2849 2850 @Override 2851 public long getLong(final long key, final int programPoint) { 2852 final int index = getArrayIndex(key); 2853 final ArrayData array = getArray(); 2854 2855 if (array.has(index)) { 2856 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index); 2857 } 2858 2859 return getLong(index, JSType.toString(key), programPoint); 2860 } 2861 2862 @Override 2863 public long getLong(final int key, final int programPoint) { 2864 final int index = getArrayIndex(key); 2865 final ArrayData array = getArray(); 2866 2867 if (array.has(index)) { 2868 return isValid(programPoint) ? array.getLongOptimistic(key, programPoint) : array.getLong(key); 2869 } 2870 2871 return getLong(index, JSType.toString(key), programPoint); 2872 } 2873 2874 private double getDouble(final int index, final String key, final int programPoint) { 2875 if (isValidArrayIndex(index)) { 2876 for (ScriptObject object = this; ; ) { 2877 if (object.getMap().containsArrayKeys()) { 2878 final FindProperty find = object.findProperty(key, false, this); 2879 if (find != null) { 2880 return getDoubleValue(find, programPoint); 2881 } 2882 } 2883 2884 if ((object = object.getProto()) == null) { 2885 break; 2886 } 2887 2888 final ArrayData array = object.getArray(); 2889 2890 if (array.has(index)) { 2891 return isValid(programPoint) ? 2892 array.getDoubleOptimistic(index, programPoint) : 2893 array.getDouble(index); 2894 } 2895 } 2896 } else { 2897 final FindProperty find = findProperty(key, true); 2898 2899 if (find != null) { 2900 return getDoubleValue(find, programPoint); 2901 } 2902 } 2903 2904 return JSType.toNumber(invokeNoSuchProperty(key, INVALID_PROGRAM_POINT)); 2905 } 2906 2907 @Override 2908 public double getDouble(final Object key, final int programPoint) { 2909 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2910 final int index = getArrayIndex(primitiveKey); 2911 final ArrayData array = getArray(); 2912 2913 if (array.has(index)) { 2914 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index); 2915 } 2916 2917 return getDouble(index, JSType.toString(primitiveKey), programPoint); 2918 } 2919 2920 @Override 2921 public double getDouble(final double key, final int programPoint) { 2922 final int index = getArrayIndex(key); 2923 final ArrayData array = getArray(); 2924 2925 if (array.has(index)) { 2926 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index); 2927 } 2928 2929 return getDouble(index, JSType.toString(key), programPoint); 2930 } 2931 2932 @Override 2933 public double getDouble(final long key, final int programPoint) { 2934 final int index = getArrayIndex(key); 2935 final ArrayData array = getArray(); 2936 2937 if (array.has(index)) { 2938 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index); 2939 } 2940 2941 return getDouble(index, JSType.toString(key), programPoint); 2942 } 2943 2944 @Override 2945 public double getDouble(final int key, final int programPoint) { 2946 final int index = getArrayIndex(key); 2947 final ArrayData array = getArray(); 2948 2949 if (array.has(index)) { 2950 return isValid(programPoint) ? array.getDoubleOptimistic(key, programPoint) : array.getDouble(key); 2951 } 2952 2953 return getDouble(index, JSType.toString(key), programPoint); 2954 } 2955 2956 private Object get(final int index, final String key) { 2957 if (isValidArrayIndex(index)) { 2958 for (ScriptObject object = this; ; ) { 2959 if (object.getMap().containsArrayKeys()) { 2960 final FindProperty find = object.findProperty(key, false, this); 2961 2962 if (find != null) { 2963 return find.getObjectValue(); 2964 } 2965 } 2966 2967 if ((object = object.getProto()) == null) { 2968 break; 2969 } 2970 2971 final ArrayData array = object.getArray(); 2972 2973 if (array.has(index)) { 2974 return array.getObject(index); 2975 } 2976 } 2977 } else { 2978 final FindProperty find = findProperty(key, true); 2979 2980 if (find != null) { 2981 return find.getObjectValue(); 2982 } 2983 } 2984 2985 return invokeNoSuchProperty(key, INVALID_PROGRAM_POINT); 2986 } 2987 2988 @Override 2989 public Object get(final Object key) { 2990 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2991 final int index = getArrayIndex(primitiveKey); 2992 final ArrayData array = getArray(); 2993 2994 if (array.has(index)) { 2995 return array.getObject(index); 2996 } 2997 2998 return get(index, JSType.toString(primitiveKey)); 2999 } 3000 3001 @Override 3002 public Object get(final double key) { 3003 final int index = getArrayIndex(key); 3004 final ArrayData array = getArray(); 3005 3006 if (array.has(index)) { 3007 return array.getObject(index); 3008 } 3009 3010 return get(index, JSType.toString(key)); 3011 } 3012 3013 @Override 3014 public Object get(final long key) { 3015 final int index = getArrayIndex(key); 3016 final ArrayData array = getArray(); 3017 3018 if (array.has(index)) { 3019 return array.getObject(index); 3020 } 3021 3022 return get(index, JSType.toString(key)); 3023 } 3024 3025 @Override 3026 public Object get(final int key) { 3027 final int index = getArrayIndex(key); 3028 final ArrayData array = getArray(); 3029 3030 if (array.has(index)) { 3031 return array.getObject(index); 3032 } 3033 3034 return get(index, JSType.toString(key)); 3035 } 3036 3037 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final int value, final int callSiteFlags) { 3038 if (getMap().containsArrayKeys()) { 3039 final String key = JSType.toString(longIndex); 3040 final FindProperty find = findProperty(key, true); 3041 if (find != null) { 3042 setObject(find, callSiteFlags, key, value); 3043 return true; 3044 } 3045 } 3046 return false; 3047 } 3048 3049 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final long value, final int callSiteFlags) { 3050 if (getMap().containsArrayKeys()) { 3051 final String key = JSType.toString(longIndex); 3052 final FindProperty find = findProperty(key, true); 3053 if (find != null) { 3054 setObject(find, callSiteFlags, key, value); 3055 return true; 3056 } 3057 } 3058 return false; 3059 } 3060 3061 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final double value, final int callSiteFlags) { 3062 if (getMap().containsArrayKeys()) { 3063 final String key = JSType.toString(longIndex); 3064 final FindProperty find = findProperty(key, true); 3065 if (find != null) { 3066 setObject(find, callSiteFlags, key, value); 3067 return true; 3068 } 3069 } 3070 return false; 3071 } 3072 3073 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final Object value, final int callSiteFlags) { 3074 if (getMap().containsArrayKeys()) { 3075 final String key = JSType.toString(longIndex); 3076 final FindProperty find = findProperty(key, true); 3077 if (find != null) { 3078 setObject(find, callSiteFlags, key, value); 3079 return true; 3080 } 3081 } 3082 return false; 3083 } 3084 3085 //value agnostic 3086 private boolean doesNotHaveEnsureLength(final long longIndex, final long oldLength, final int callSiteFlags) { 3087 if (longIndex >= oldLength) { 3088 if (!isExtensible()) { 3089 if (isStrictFlag(callSiteFlags)) { 3090 throw typeError("object.non.extensible", JSType.toString(longIndex), ScriptRuntime.safeToString(this)); 3091 } 3092 return true; 3093 } 3094 setArray(getArray().ensure(longIndex)); 3095 } 3096 return false; 3097 } 3098 3099 private void doesNotHaveEnsureDelete(final long longIndex, final long oldLength, final boolean strict) { 3100 if (longIndex > oldLength) { 3101 ArrayData array = getArray(); 3102 if (array.canDelete(oldLength, longIndex - 1, strict)) { 3103 array = array.delete(oldLength, longIndex - 1); 3104 } 3105 setArray(array); 3106 } 3107 } 3108 3109 private void doesNotHave(final int index, final int value, final int callSiteFlags) { 3110 final long oldLength = getArray().length(); 3111 final long longIndex = ArrayIndex.toLongIndex(index); 3112 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3113 final boolean strict = isStrictFlag(callSiteFlags); 3114 setArray(getArray().set(index, value, strict)); 3115 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3116 } 3117 } 3118 3119 private void doesNotHave(final int index, final long value, final int callSiteFlags) { 3120 final long oldLength = getArray().length(); 3121 final long longIndex = ArrayIndex.toLongIndex(index); 3122 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3123 final boolean strict = isStrictFlag(callSiteFlags); 3124 setArray(getArray().set(index, value, strict)); 3125 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3126 } 3127 } 3128 3129 private void doesNotHave(final int index, final double value, final int callSiteFlags) { 3130 final long oldLength = getArray().length(); 3131 final long longIndex = ArrayIndex.toLongIndex(index); 3132 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3133 final boolean strict = isStrictFlag(callSiteFlags); 3134 setArray(getArray().set(index, value, strict)); 3135 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3136 } 3137 } 3138 3139 private void doesNotHave(final int index, final Object value, final int callSiteFlags) { 3140 final long oldLength = getArray().length(); 3141 final long longIndex = ArrayIndex.toLongIndex(index); 3142 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3143 final boolean strict = isStrictFlag(callSiteFlags); 3144 setArray(getArray().set(index, value, strict)); 3145 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3146 } 3147 } 3148 3149 /** 3150 * This is the most generic of all Object setters. Most of the others use this in some form. 3151 * TODO: should be further specialized 3152 * 3153 * @param find found property 3154 * @param callSiteFlags callsite flags 3155 * @param key property key 3156 * @param value property value 3157 */ 3158 public final void setObject(final FindProperty find, final int callSiteFlags, final String key, final Object value) { 3159 FindProperty f = find; 3160 3161 invalidateGlobalConstant(key); 3162 3163 if (f != null && f.isInherited() && !(f.getProperty() instanceof UserAccessorProperty)) { 3164 final boolean isScope = isScopeFlag(callSiteFlags); 3165 // If the start object of the find is not this object it means the property was found inside a 3166 // 'with' statement expression (see WithObject.findProperty()). In this case we forward the 'set' 3167 // to the 'with' object. 3168 // Note that although a 'set' operation involving a with statement follows scope rules outside 3169 // the 'with' expression (the 'set' operation is performed on the owning prototype if it exists), 3170 // it follows non-scope rules inside the 'with' expression (set is performed on the top level object). 3171 // This is why we clear the callsite flags and FindProperty in the forward call to the 'with' object. 3172 if (isScope && f.getSelf() != this) { 3173 f.getSelf().setObject(null, 0, key, value); 3174 return; 3175 } 3176 // Setting a property should not modify the property in prototype unless this is a scope callsite 3177 // and the owner is a scope object as well (with the exception of 'with' statement handled above). 3178 if (!isScope || !f.getOwner().isScope()) { 3179 f = null; 3180 } 3181 } 3182 3183 if (f != null) { 3184 if (!f.getProperty().isWritable()) { 3185 if (isScopeFlag(callSiteFlags) && f.getProperty().isLexicalBinding()) { 3186 throw typeError("assign.constant", key); // Overwriting ES6 const should throw also in non-strict mode. 3187 } 3188 if (isStrictFlag(callSiteFlags)) { 3189 throw typeError("property.not.writable", key, ScriptRuntime.safeToString(this)); 3190 } 3191 return; 3192 } 3193 3194 f.setValue(value, isStrictFlag(callSiteFlags)); 3195 3196 } else if (!isExtensible()) { 3197 if (isStrictFlag(callSiteFlags)) { 3198 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this)); 3199 } 3200 } else { 3201 ScriptObject sobj = this; 3202 // undefined scope properties are set in the global object. 3203 if (isScope()) { 3204 while (sobj != null && !(sobj instanceof Global)) { 3205 sobj = sobj.getProto(); 3206 } 3207 assert sobj != null : "no parent global object in scope"; 3208 } 3209 //this will unbox any Number object to its primitive type in case the 3210 //property supports primitive types, so it doesn't matter that it comes 3211 //in as an Object. 3212 sobj.addSpillProperty(key, 0, value, true); 3213 } 3214 } 3215 3216 @Override 3217 public void set(final Object key, final int value, final int callSiteFlags) { 3218 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3219 final int index = getArrayIndex(primitiveKey); 3220 3221 if (isValidArrayIndex(index)) { 3222 final ArrayData data = getArray(); 3223 if (data.has(index)) { 3224 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3225 } else { 3226 doesNotHave(index, value, callSiteFlags); 3227 } 3228 3229 return; 3230 } 3231 3232 final String propName = JSType.toString(primitiveKey); 3233 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3234 } 3235 3236 @Override 3237 public void set(final Object key, final long value, final int callSiteFlags) { 3238 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3239 final int index = getArrayIndex(primitiveKey); 3240 3241 if (isValidArrayIndex(index)) { 3242 final ArrayData data = getArray(); 3243 if (data.has(index)) { 3244 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3245 } else { 3246 doesNotHave(index, value, callSiteFlags); 3247 } 3248 3249 return; 3250 } 3251 3252 final String propName = JSType.toString(primitiveKey); 3253 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3254 } 3255 3256 @Override 3257 public void set(final Object key, final double value, final int callSiteFlags) { 3258 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3259 final int index = getArrayIndex(primitiveKey); 3260 3261 if (isValidArrayIndex(index)) { 3262 final ArrayData data = getArray(); 3263 if (data.has(index)) { 3264 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3265 } else { 3266 doesNotHave(index, value, callSiteFlags); 3267 } 3268 3269 return; 3270 } 3271 3272 final String propName = JSType.toString(primitiveKey); 3273 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3274 } 3275 3276 @Override 3277 public void set(final Object key, final Object value, final int callSiteFlags) { 3278 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3279 final int index = getArrayIndex(primitiveKey); 3280 3281 if (isValidArrayIndex(index)) { 3282 final ArrayData data = getArray(); 3283 if (data.has(index)) { 3284 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3285 } else { 3286 doesNotHave(index, value, callSiteFlags); 3287 } 3288 3289 return; 3290 } 3291 3292 final String propName = JSType.toString(primitiveKey); 3293 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3294 } 3295 3296 @Override 3297 public void set(final double key, final int value, final int callSiteFlags) { 3298 final int index = getArrayIndex(key); 3299 3300 if (isValidArrayIndex(index)) { 3301 final ArrayData data = getArray(); 3302 if (data.has(index)) { 3303 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3304 } else { 3305 doesNotHave(index, value, callSiteFlags); 3306 } 3307 3308 return; 3309 } 3310 3311 final String propName = JSType.toString(key); 3312 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3313 } 3314 3315 @Override 3316 public void set(final double key, final long value, final int callSiteFlags) { 3317 final int index = getArrayIndex(key); 3318 3319 if (isValidArrayIndex(index)) { 3320 final ArrayData data = getArray(); 3321 if (data.has(index)) { 3322 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3323 } else { 3324 doesNotHave(index, value, callSiteFlags); 3325 } 3326 3327 return; 3328 } 3329 3330 final String propName = JSType.toString(key); 3331 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3332 } 3333 3334 @Override 3335 public void set(final double key, final double value, final int callSiteFlags) { 3336 final int index = getArrayIndex(key); 3337 3338 if (isValidArrayIndex(index)) { 3339 final ArrayData data = getArray(); 3340 if (data.has(index)) { 3341 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3342 } else { 3343 doesNotHave(index, value, callSiteFlags); 3344 } 3345 3346 return; 3347 } 3348 3349 final String propName = JSType.toString(key); 3350 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3351 } 3352 3353 @Override 3354 public void set(final double key, final Object value, final int callSiteFlags) { 3355 final int index = getArrayIndex(key); 3356 3357 if (isValidArrayIndex(index)) { 3358 final ArrayData data = getArray(); 3359 if (data.has(index)) { 3360 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3361 } else { 3362 doesNotHave(index, value, callSiteFlags); 3363 } 3364 3365 return; 3366 } 3367 3368 final String propName = JSType.toString(key); 3369 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3370 } 3371 3372 @Override 3373 public void set(final long key, final int value, final int callSiteFlags) { 3374 final int index = getArrayIndex(key); 3375 3376 if (isValidArrayIndex(index)) { 3377 final ArrayData data = getArray(); 3378 if (data.has(index)) { 3379 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3380 } else { 3381 doesNotHave(index, value, callSiteFlags); 3382 } 3383 3384 return; 3385 } 3386 3387 final String propName = JSType.toString(key); 3388 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3389 } 3390 3391 @Override 3392 public void set(final long key, final long value, final int callSiteFlags) { 3393 final int index = getArrayIndex(key); 3394 3395 if (isValidArrayIndex(index)) { 3396 final ArrayData data = getArray(); 3397 if (data.has(index)) { 3398 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3399 } else { 3400 doesNotHave(index, value, callSiteFlags); 3401 } 3402 3403 return; 3404 } 3405 3406 final String propName = JSType.toString(key); 3407 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3408 } 3409 3410 @Override 3411 public void set(final long key, final double value, final int callSiteFlags) { 3412 final int index = getArrayIndex(key); 3413 3414 if (isValidArrayIndex(index)) { 3415 final ArrayData data = getArray(); 3416 if (data.has(index)) { 3417 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3418 } else { 3419 doesNotHave(index, value, callSiteFlags); 3420 } 3421 3422 return; 3423 } 3424 3425 final String propName = JSType.toString(key); 3426 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3427 } 3428 3429 @Override 3430 public void set(final long key, final Object value, final int callSiteFlags) { 3431 final int index = getArrayIndex(key); 3432 3433 if (isValidArrayIndex(index)) { 3434 final ArrayData data = getArray(); 3435 if (data.has(index)) { 3436 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3437 } else { 3438 doesNotHave(index, value, callSiteFlags); 3439 } 3440 3441 return; 3442 } 3443 3444 final String propName = JSType.toString(key); 3445 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3446 } 3447 3448 @Override 3449 public void set(final int key, final int value, final int callSiteFlags) { 3450 final int index = getArrayIndex(key); 3451 if (isValidArrayIndex(index)) { 3452 if (getArray().has(index)) { 3453 final ArrayData data = getArray(); 3454 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3455 } else { 3456 doesNotHave(index, value, callSiteFlags); 3457 } 3458 return; 3459 } 3460 3461 final String propName = JSType.toString(key); 3462 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3463 } 3464 3465 @Override 3466 public void set(final int key, final long value, final int callSiteFlags) { 3467 final int index = getArrayIndex(key); 3468 3469 if (isValidArrayIndex(index)) { 3470 final ArrayData data = getArray(); 3471 if (data.has(index)) { 3472 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3473 } else { 3474 doesNotHave(index, value, callSiteFlags); 3475 } 3476 3477 return; 3478 } 3479 3480 final String propName = JSType.toString(key); 3481 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3482 } 3483 3484 @Override 3485 public void set(final int key, final double value, final int callSiteFlags) { 3486 final int index = getArrayIndex(key); 3487 3488 if (isValidArrayIndex(index)) { 3489 final ArrayData data = getArray(); 3490 if (data.has(index)) { 3491 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3492 } else { 3493 doesNotHave(index, value, callSiteFlags); 3494 } 3495 3496 return; 3497 } 3498 3499 final String propName = JSType.toString(key); 3500 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3501 } 3502 3503 @Override 3504 public void set(final int key, final Object value, final int callSiteFlags) { 3505 final int index = getArrayIndex(key); 3506 3507 if (isValidArrayIndex(index)) { 3508 final ArrayData data = getArray(); 3509 if (data.has(index)) { 3510 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3511 } else { 3512 doesNotHave(index, value, callSiteFlags); 3513 } 3514 3515 return; 3516 } 3517 3518 final String propName = JSType.toString(key); 3519 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3520 } 3521 3522 @Override 3523 public boolean has(final Object key) { 3524 final Object primitiveKey = JSType.toPrimitive(key); 3525 final int index = getArrayIndex(primitiveKey); 3526 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), true); 3527 } 3528 3529 @Override 3530 public boolean has(final double key) { 3531 final int index = getArrayIndex(key); 3532 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true); 3533 } 3534 3535 @Override 3536 public boolean has(final long key) { 3537 final int index = getArrayIndex(key); 3538 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true); 3539 } 3540 3541 @Override 3542 public boolean has(final int key) { 3543 final int index = getArrayIndex(key); 3544 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true); 3545 } 3546 3547 private boolean hasArrayProperty(final int index) { 3548 boolean hasArrayKeys = false; 3549 3550 for (ScriptObject self = this; self != null; self = self.getProto()) { 3551 if (self.getArray().has(index)) { 3552 return true; 3553 } 3554 hasArrayKeys = hasArrayKeys || self.getMap().containsArrayKeys(); 3555 } 3556 3557 return hasArrayKeys && hasProperty(ArrayIndex.toKey(index), true); 3558 } 3559 3560 @Override 3561 public boolean hasOwnProperty(final Object key) { 3562 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3563 final int index = getArrayIndex(primitiveKey); 3564 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), false); 3565 } 3566 3567 @Override 3568 public boolean hasOwnProperty(final int key) { 3569 final int index = getArrayIndex(key); 3570 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false); 3571 } 3572 3573 @Override 3574 public boolean hasOwnProperty(final long key) { 3575 final int index = getArrayIndex(key); 3576 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false); 3577 } 3578 3579 @Override 3580 public boolean hasOwnProperty(final double key) { 3581 final int index = getArrayIndex(key); 3582 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false); 3583 } 3584 3585 private boolean hasOwnArrayProperty(final int index) { 3586 return getArray().has(index) || getMap().containsArrayKeys() && hasProperty(ArrayIndex.toKey(index), false); 3587 } 3588 3589 @Override 3590 public boolean delete(final int key, final boolean strict) { 3591 final int index = getArrayIndex(key); 3592 final ArrayData array = getArray(); 3593 3594 if (array.has(index)) { 3595 if (array.canDelete(index, strict)) { 3596 setArray(array.delete(index)); 3597 return true; 3598 } 3599 return false; 3600 } 3601 return deleteObject(JSType.toObject(key), strict); 3602 } 3603 3604 @Override 3605 public boolean delete(final long key, final boolean strict) { 3606 final int index = getArrayIndex(key); 3607 final ArrayData array = getArray(); 3608 3609 if (array.has(index)) { 3610 if (array.canDelete(index, strict)) { 3611 setArray(array.delete(index)); 3612 return true; 3613 } 3614 return false; 3615 } 3616 3617 return deleteObject(JSType.toObject(key), strict); 3618 } 3619 3620 @Override 3621 public boolean delete(final double key, final boolean strict) { 3622 final int index = getArrayIndex(key); 3623 final ArrayData array = getArray(); 3624 3625 if (array.has(index)) { 3626 if (array.canDelete(index, strict)) { 3627 setArray(array.delete(index)); 3628 return true; 3629 } 3630 return false; 3631 } 3632 3633 return deleteObject(JSType.toObject(key), strict); 3634 } 3635 3636 @Override 3637 public boolean delete(final Object key, final boolean strict) { 3638 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3639 final int index = getArrayIndex(primitiveKey); 3640 final ArrayData array = getArray(); 3641 3642 if (array.has(index)) { 3643 if (array.canDelete(index, strict)) { 3644 setArray(array.delete(index)); 3645 return true; 3646 } 3647 return false; 3648 } 3649 3650 return deleteObject(primitiveKey, strict); 3651 } 3652 3653 private boolean deleteObject(final Object key, final boolean strict) { 3654 final String propName = JSType.toString(key); 3655 final FindProperty find = findProperty(propName, false); 3656 3657 if (find == null) { 3658 return true; 3659 } 3660 3661 if (!find.getProperty().isConfigurable()) { 3662 if (strict) { 3663 throw typeError("cant.delete.property", propName, ScriptRuntime.safeToString(this)); 3664 } 3665 return false; 3666 } 3667 3668 final Property prop = find.getProperty(); 3669 deleteOwnProperty(prop); 3670 3671 return true; 3672 } 3673 3674 /** 3675 * Return a shallow copy of this ScriptObject. 3676 * @return a shallow copy. 3677 */ 3678 public final ScriptObject copy() { 3679 try { 3680 return clone(); 3681 } catch (final CloneNotSupportedException e) { 3682 throw new RuntimeException(e); 3683 } 3684 } 3685 3686 @Override 3687 protected ScriptObject clone() throws CloneNotSupportedException { 3688 final ScriptObject clone = (ScriptObject) super.clone(); 3689 if (objectSpill != null) { 3690 clone.objectSpill = objectSpill.clone(); 3691 if (primitiveSpill != null) { 3692 clone.primitiveSpill = primitiveSpill.clone(); 3693 } 3694 } 3695 clone.arrayData = arrayData.copy(); 3696 return clone; 3697 } 3698 3699 /** 3700 * Make a new UserAccessorProperty property. getter and setter functions are stored in 3701 * this ScriptObject and slot values are used in property object. 3702 * 3703 * @param key the property name 3704 * @param propertyFlags attribute flags of the property 3705 * @param getter getter function for the property 3706 * @param setter setter function for the property 3707 * @return the newly created UserAccessorProperty 3708 */ 3709 protected final UserAccessorProperty newUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 3710 final UserAccessorProperty uc = getMap().newUserAccessors(key, propertyFlags); 3711 //property.getSetter(Object.class, getMap()); 3712 uc.setAccessors(this, getMap(), new UserAccessorProperty.Accessors(getter, setter)); 3713 return uc; 3714 } 3715 3716 /** 3717 * Returns {@code true} if properties for this object should use dual field mode, {@code false} otherwise. 3718 * @return {@code true} if dual fields should be used. 3719 */ 3720 protected boolean useDualFields() { 3721 return !StructureLoader.isSingleFieldStructure(getClass().getName()); 3722 } 3723 3724 Object ensureSpillSize(final int slot) { 3725 final int oldLength = objectSpill == null ? 0 : objectSpill.length; 3726 if (slot < oldLength) { 3727 return this; 3728 } 3729 final int newLength = alignUp(slot + 1, SPILL_RATE); 3730 final Object[] newObjectSpill = new Object[newLength]; 3731 final long[] newPrimitiveSpill = useDualFields() ? new long[newLength] : null; 3732 3733 if (objectSpill != null) { 3734 System.arraycopy(objectSpill, 0, newObjectSpill, 0, oldLength); 3735 if (primitiveSpill != null && newPrimitiveSpill != null) { 3736 System.arraycopy(primitiveSpill, 0, newPrimitiveSpill, 0, oldLength); 3737 } 3738 } 3739 3740 this.primitiveSpill = newPrimitiveSpill; 3741 this.objectSpill = newObjectSpill; 3742 3743 return this; 3744 } 3745 3746 private static MethodHandle findOwnMH_V(final Class<? extends ScriptObject> clazz, final String name, final Class<?> rtype, final Class<?>... types) { 3747 // TODO: figure out how can it work for NativeArray$Prototype etc. 3748 return MH.findVirtual(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types)); 3749 } 3750 3751 private static MethodHandle findOwnMH_V(final String name, final Class<?> rtype, final Class<?>... types) { 3752 return findOwnMH_V(ScriptObject.class, name, rtype, types); 3753 } 3754 3755 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) { 3756 return MH.findStatic(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types)); 3757 } 3758 3759 private static MethodHandle getKnownFunctionPropertyGuardSelf(final PropertyMap map, final MethodHandle getter, final ScriptFunction func) { 3760 return MH.insertArguments(KNOWNFUNCPROPGUARDSELF, 1, map, getter, func); 3761 } 3762 3763 @SuppressWarnings("unused") 3764 private static boolean knownFunctionPropertyGuardSelf(final Object self, final PropertyMap map, final MethodHandle getter, final ScriptFunction func) { 3765 if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) { 3766 try { 3767 return getter.invokeExact(self) == func; 3768 } catch (final RuntimeException | Error e) { 3769 throw e; 3770 } catch (final Throwable t) { 3771 throw new RuntimeException(t); 3772 } 3773 } 3774 3775 return false; 3776 } 3777 3778 private static MethodHandle getKnownFunctionPropertyGuardProto(final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) { 3779 return MH.insertArguments(KNOWNFUNCPROPGUARDPROTO, 1, map, getter, depth, func); 3780 } 3781 3782 private static ScriptObject getProto(final ScriptObject self, final int depth) { 3783 ScriptObject proto = self; 3784 for (int d = 0; d < depth; d++) { 3785 proto = proto.getProto(); 3786 if (proto == null) { 3787 return null; 3788 } 3789 } 3790 3791 return proto; 3792 } 3793 3794 @SuppressWarnings("unused") 3795 private static boolean knownFunctionPropertyGuardProto(final Object self, final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) { 3796 if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) { 3797 final ScriptObject proto = getProto((ScriptObject)self, depth); 3798 if (proto == null) { 3799 return false; 3800 } 3801 try { 3802 return getter.invokeExact((Object)proto) == func; 3803 } catch (final RuntimeException | Error e) { 3804 throw e; 3805 } catch (final Throwable t) { 3806 throw new RuntimeException(t); 3807 } 3808 } 3809 3810 return false; 3811 } 3812 3813 /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created */ 3814 private static int count; 3815 3816 /** 3817 * Get number of {@code ScriptObject} instances created. If not running in debug 3818 * mode this is always 0 3819 * 3820 * @return number of ScriptObjects created 3821 */ 3822 public static int getCount() { 3823 return count; 3824 } 3825 }