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 java.util.concurrent.atomic.LongAdder; 68 import jdk.internal.dynalink.CallSiteDescriptor; 69 import jdk.internal.dynalink.linker.GuardedInvocation; 70 import jdk.internal.dynalink.linker.LinkRequest; 71 import jdk.internal.dynalink.support.CallSiteDescriptorFactory; 72 import jdk.nashorn.internal.codegen.CompilerConstants.Call; 73 import jdk.nashorn.internal.codegen.ObjectClassGenerator; 74 import jdk.nashorn.internal.codegen.types.Type; 75 import jdk.nashorn.internal.lookup.Lookup; 76 import jdk.nashorn.internal.objects.AccessorPropertyDescriptor; 77 import jdk.nashorn.internal.objects.DataPropertyDescriptor; 78 import jdk.nashorn.internal.objects.Global; 79 import jdk.nashorn.internal.objects.NativeArray; 80 import jdk.nashorn.internal.runtime.arrays.ArrayData; 81 import jdk.nashorn.internal.runtime.arrays.ArrayIndex; 82 import jdk.nashorn.internal.runtime.linker.Bootstrap; 83 import jdk.nashorn.internal.runtime.linker.LinkerCallSite; 84 import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor; 85 import jdk.nashorn.internal.runtime.linker.NashornGuards; 86 87 /** 88 * Base class for generic JavaScript objects. 89 * <p> 90 * Notes: 91 * <ul> 92 * <li>The map is used to identify properties in the object.</li> 93 * <li>If the map is modified then it must be cloned and replaced. This notifies 94 * any code that made assumptions about the object that things have changed. 95 * Ex. CallSites that have been validated must check to see if the map has 96 * changed (or a map from a different object type) and hence relink the method 97 * to call.</li> 98 * <li>Modifications of the map include adding/deleting attributes or changing a 99 * function field value.</li> 100 * </ul> 101 */ 102 103 public abstract class ScriptObject implements PropertyAccess, Cloneable { 104 /** __proto__ special property name inside object literals. ES6 draft. */ 105 public static final String PROTO_PROPERTY_NAME = "__proto__"; 106 107 /** Search fall back routine name for "no such method" */ 108 public static final String NO_SUCH_METHOD_NAME = "__noSuchMethod__"; 109 110 /** Search fall back routine name for "no such property" */ 111 public static final String NO_SUCH_PROPERTY_NAME = "__noSuchProperty__"; 112 113 /** Per ScriptObject flag - is this an array object? */ 114 public static final int IS_ARRAY = 1 << 0; 115 116 /** Per ScriptObject flag - is this an arguments object? */ 117 public static final int IS_ARGUMENTS = 1 << 1; 118 119 /** Is length property not-writable? */ 120 public static final int IS_LENGTH_NOT_WRITABLE = 1 << 2; 121 122 /** Is this a builtin object? */ 123 public static final int IS_BUILTIN = 1 << 3; 124 125 /** 126 * Spill growth rate - by how many elements does {@link ScriptObject#primitiveSpill} and 127 * {@link ScriptObject#objectSpill} when full 128 */ 129 public static final int SPILL_RATE = 8; 130 131 /** Map to property information and accessor functions. Ordered by insertion. */ 132 private PropertyMap map; 133 134 /** objects proto. */ 135 private ScriptObject proto; 136 137 /** Object flags. */ 138 private int flags; 139 140 /** Area for primitive properties added to object after instantiation, see {@link AccessorProperty} */ 141 protected long[] primitiveSpill; 142 143 /** Area for reference properties added to object after instantiation, see {@link AccessorProperty} */ 144 protected Object[] objectSpill; 145 146 /** Indexed array data. */ 147 private ArrayData arrayData; 148 149 /** Method handle to retrieve prototype of this object */ 150 public static final MethodHandle GETPROTO = findOwnMH_V("getProto", ScriptObject.class); 151 152 static final MethodHandle MEGAMORPHIC_GET = findOwnMH_V("megamorphicGet", Object.class, String.class, boolean.class, boolean.class); 153 static final MethodHandle GLOBALFILTER = findOwnMH_S("globalFilter", Object.class, Object.class); 154 static final MethodHandle DECLARE_AND_SET = findOwnMH_V("declareAndSet", void.class, String.class, Object.class); 155 156 private static final MethodHandle TRUNCATINGFILTER = findOwnMH_S("truncatingFilter", Object[].class, int.class, Object[].class); 157 private static final MethodHandle KNOWNFUNCPROPGUARDSELF = findOwnMH_S("knownFunctionPropertyGuardSelf", boolean.class, Object.class, PropertyMap.class, MethodHandle.class, ScriptFunction.class); 158 private static final MethodHandle KNOWNFUNCPROPGUARDPROTO = findOwnMH_S("knownFunctionPropertyGuardProto", boolean.class, Object.class, PropertyMap.class, MethodHandle.class, int.class, ScriptFunction.class); 159 160 private static final ArrayList<MethodHandle> PROTO_FILTERS = new ArrayList<>(); 161 162 /** Method handle for getting the array data */ 163 public static final Call GET_ARRAY = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getArray", ArrayData.class); 164 165 /** Method handle for getting a function argument at a given index. Used from MapCreator */ 166 public static final Call GET_ARGUMENT = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getArgument", Object.class, int.class); 167 168 /** Method handle for setting a function argument at a given index. Used from MapCreator */ 169 public static final Call SET_ARGUMENT = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setArgument", void.class, int.class, Object.class); 170 171 /** Method handle for getting the proto of a ScriptObject */ 172 public static final Call GET_PROTO = virtualCallNoLookup(ScriptObject.class, "getProto", ScriptObject.class); 173 174 /** Method handle for getting the proto of a ScriptObject */ 175 public static final Call GET_PROTO_DEPTH = virtualCallNoLookup(ScriptObject.class, "getProto", ScriptObject.class, int.class); 176 177 /** Method handle for setting the proto of a ScriptObject */ 178 public static final Call SET_GLOBAL_OBJECT_PROTO = staticCallNoLookup(ScriptObject.class, "setGlobalObjectProto", void.class, ScriptObject.class); 179 180 /** Method handle for setting the proto of a ScriptObject after checking argument */ 181 public static final Call SET_PROTO_FROM_LITERAL = virtualCallNoLookup(ScriptObject.class, "setProtoFromLiteral", void.class, Object.class); 182 183 /** Method handle for setting the user accessors of a ScriptObject */ 184 //TODO fastpath this 185 public static final Call SET_USER_ACCESSORS = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setUserAccessors", void.class, String.class, ScriptFunction.class, ScriptFunction.class); 186 187 static final MethodHandle[] SET_SLOW = new MethodHandle[] { 188 findOwnMH_V("set", void.class, Object.class, int.class, int.class), 189 findOwnMH_V("set", void.class, Object.class, long.class, int.class), 190 findOwnMH_V("set", void.class, Object.class, double.class, int.class), 191 findOwnMH_V("set", void.class, Object.class, Object.class, int.class) 192 }; 193 194 /** Method handle to reset the map of this ScriptObject */ 195 public static final Call SET_MAP = virtualCallNoLookup(ScriptObject.class, "setMap", void.class, PropertyMap.class); 196 197 static final MethodHandle CAS_MAP = findOwnMH_V("compareAndSetMap", boolean.class, PropertyMap.class, PropertyMap.class); 198 static final MethodHandle EXTENSION_CHECK = findOwnMH_V("extensionCheck", boolean.class, boolean.class, String.class); 199 static final MethodHandle ENSURE_SPILL_SIZE = findOwnMH_V("ensureSpillSize", Object.class, int.class); 200 201 /** 202 * Constructor 203 */ 204 public ScriptObject() { 205 this(null); 206 } 207 208 /** 209 * Constructor 210 * 211 * @param map {@link PropertyMap} used to create the initial object 212 */ 213 public ScriptObject(final PropertyMap map) { 214 if (Context.DEBUG) { 215 ScriptObject.count.increment(); 216 } 217 this.arrayData = ArrayData.EMPTY_ARRAY; 218 this.setMap(map == null ? PropertyMap.newMap() : map); 219 } 220 221 /** 222 * Constructor that directly sets the prototype to {@code proto} and property map to 223 * {@code map} without invalidating the map as calling {@link #setProto(ScriptObject)} 224 * would do. This should only be used for objects that are always constructed with the 225 * same combination of prototype and property map. 226 * 227 * @param proto the prototype object 228 * @param map initial {@link PropertyMap} 229 */ 230 protected ScriptObject(final ScriptObject proto, final PropertyMap map) { 231 this(map); 232 this.proto = proto; 233 } 234 235 /** 236 * Constructor used to instantiate spill properties directly. Used from 237 * SpillObjectCreator. 238 * 239 * @param map property maps 240 * @param primitiveSpill primitive spills 241 * @param objectSpill reference spills 242 */ 243 public ScriptObject(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) { 244 this(map); 245 this.primitiveSpill = primitiveSpill; 246 this.objectSpill = objectSpill; 247 assert primitiveSpill == null || primitiveSpill.length == objectSpill.length : " primitive spill pool size is not the same length as object spill pool size"; 248 } 249 250 /** 251 * Check whether this is a global object 252 * @return true if global 253 */ 254 protected boolean isGlobal() { 255 return false; 256 } 257 258 private static int alignUp(final int size, final int alignment) { 259 return size + alignment - 1 & ~(alignment - 1); 260 } 261 262 /** 263 * Given a number of properties, return the aligned to SPILL_RATE 264 * buffer size required for the smallest spill pool needed to 265 * house them 266 * @param nProperties number of properties 267 * @return property buffer length, a multiple of SPILL_RATE 268 */ 269 public static int spillAllocationLength(final int nProperties) { 270 return alignUp(nProperties, SPILL_RATE); 271 } 272 273 /** 274 * Copy all properties from the source object with their receiver bound to the source. 275 * This function was known as mergeMap 276 * 277 * @param source The source object to copy from. 278 */ 279 public void addBoundProperties(final ScriptObject source) { 280 addBoundProperties(source, source.getMap().getProperties()); 281 } 282 283 /** 284 * Copy all properties from the array with their receiver bound to the source. 285 * 286 * @param source The source object to copy from. 287 * @param properties The array of properties to copy. 288 */ 289 public void addBoundProperties(final ScriptObject source, final Property[] properties) { 290 PropertyMap newMap = this.getMap(); 291 final boolean extensible = newMap.isExtensible(); 292 293 for (final Property property : properties) { 294 newMap = addBoundProperty(newMap, source, property, extensible); 295 } 296 297 this.setMap(newMap); 298 } 299 300 /** 301 * Add a bound property from {@code source}, using the interim property map {@code propMap}, and return the 302 * new interim property map. 303 * 304 * @param propMap the property map 305 * @param source the source object 306 * @param property the property to be added 307 * @param extensible whether the current object is extensible or not 308 * @return the new property map 309 */ 310 protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final Property property, final boolean extensible) { 311 PropertyMap newMap = propMap; 312 final String key = property.getKey(); 313 final Property oldProp = newMap.findProperty(key); 314 if (oldProp == null) { 315 if (! extensible) { 316 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this)); 317 } 318 319 if (property instanceof UserAccessorProperty) { 320 // Note: we copy accessor functions to this object which is semantically different from binding. 321 final UserAccessorProperty prop = this.newUserAccessors(key, property.getFlags(), property.getGetterFunction(source), property.getSetterFunction(source)); 322 newMap = newMap.addPropertyNoHistory(prop); 323 } else { 324 newMap = newMap.addPropertyBind((AccessorProperty)property, source); 325 } 326 } else { 327 // See ECMA section 10.5 Declaration Binding Instantiation 328 // step 5 processing each function declaration. 329 if (property.isFunctionDeclaration() && !oldProp.isConfigurable()) { 330 if (oldProp instanceof UserAccessorProperty || 331 !(oldProp.isWritable() && oldProp.isEnumerable())) { 332 throw typeError("cant.redefine.property", key, ScriptRuntime.safeToString(this)); 333 } 334 } 335 } 336 return newMap; 337 } 338 339 /** 340 * Copy all properties from the array with their receiver bound to the source. 341 * 342 * @param source The source object to copy from. 343 * @param properties The collection of accessor properties to copy. 344 */ 345 public void addBoundProperties(final Object source, final AccessorProperty[] properties) { 346 PropertyMap newMap = this.getMap(); 347 final boolean extensible = newMap.isExtensible(); 348 349 for (final AccessorProperty property : properties) { 350 final String key = property.getKey(); 351 352 if (newMap.findProperty(key) == null) { 353 if (! extensible) { 354 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this)); 355 } 356 newMap = newMap.addPropertyBind(property, source); 357 } 358 } 359 360 this.setMap(newMap); 361 } 362 363 /** 364 * Bind the method handle to the specified receiver, while preserving its original type (it will just ignore the 365 * first argument in lieu of the bound argument). 366 * @param methodHandle Method handle to bind to. 367 * @param receiver Object to bind. 368 * @return Bound method handle. 369 */ 370 static MethodHandle bindTo(final MethodHandle methodHandle, final Object receiver) { 371 return MH.dropArguments(MH.bindTo(methodHandle, receiver), 0, methodHandle.type().parameterType(0)); 372 } 373 374 /** 375 * Return a property iterator. 376 * @return Property iterator. 377 */ 378 public Iterator<String> propertyIterator() { 379 return new KeyIterator(this); 380 } 381 382 /** 383 * Return a property value iterator. 384 * @return Property value iterator. 385 */ 386 public Iterator<Object> valueIterator() { 387 return new ValueIterator(this); 388 } 389 390 /** 391 * ECMA 8.10.1 IsAccessorDescriptor ( Desc ) 392 * @return true if this has a {@link AccessorPropertyDescriptor} with a getter or a setter 393 */ 394 public final boolean isAccessorDescriptor() { 395 return has(GET) || has(SET); 396 } 397 398 /** 399 * ECMA 8.10.2 IsDataDescriptor ( Desc ) 400 * @return true if this has a {@link DataPropertyDescriptor}, i.e. the object has a property value and is writable 401 */ 402 public final boolean isDataDescriptor() { 403 return has(VALUE) || has(WRITABLE); 404 } 405 406 /** 407 * ECMA 8.10.5 ToPropertyDescriptor ( Obj ) 408 * 409 * @return property descriptor 410 */ 411 public final PropertyDescriptor toPropertyDescriptor() { 412 final Global global = Context.getGlobal(); 413 414 final PropertyDescriptor desc; 415 if (isDataDescriptor()) { 416 if (has(SET) || has(GET)) { 417 throw typeError(global, "inconsistent.property.descriptor"); 418 } 419 420 desc = global.newDataDescriptor(UNDEFINED, false, false, false); 421 } else if (isAccessorDescriptor()) { 422 if (has(VALUE) || has(WRITABLE)) { 423 throw typeError(global, "inconsistent.property.descriptor"); 424 } 425 426 desc = global.newAccessorDescriptor(UNDEFINED, UNDEFINED, false, false); 427 } else { 428 desc = global.newGenericDescriptor(false, false); 429 } 430 431 return desc.fillFrom(this); 432 } 433 434 /** 435 * ECMA 8.10.5 ToPropertyDescriptor ( Obj ) 436 * 437 * @param global global scope object 438 * @param obj object to create property descriptor from 439 * 440 * @return property descriptor 441 */ 442 public static PropertyDescriptor toPropertyDescriptor(final Global global, final Object obj) { 443 if (obj instanceof ScriptObject) { 444 return ((ScriptObject)obj).toPropertyDescriptor(); 445 } 446 447 throw typeError(global, "not.an.object", ScriptRuntime.safeToString(obj)); 448 } 449 450 /** 451 * ECMA 8.12.1 [[GetOwnProperty]] (P) 452 * 453 * @param key property key 454 * 455 * @return Returns the Property Descriptor of the named own property of this 456 * object, or undefined if absent. 457 */ 458 public Object getOwnPropertyDescriptor(final String key) { 459 final Property property = getMap().findProperty(key); 460 461 final Global global = Context.getGlobal(); 462 463 if (property != null) { 464 final ScriptFunction get = property.getGetterFunction(this); 465 final ScriptFunction set = property.getSetterFunction(this); 466 467 final boolean configurable = property.isConfigurable(); 468 final boolean enumerable = property.isEnumerable(); 469 final boolean writable = property.isWritable(); 470 471 if (property instanceof UserAccessorProperty) { 472 return global.newAccessorDescriptor( 473 get != null ? 474 get : 475 UNDEFINED, 476 set != null ? 477 set : 478 UNDEFINED, 479 configurable, 480 enumerable); 481 } 482 483 return global.newDataDescriptor(getWithProperty(property), configurable, enumerable, writable); 484 } 485 486 final int index = getArrayIndex(key); 487 final ArrayData array = getArray(); 488 489 if (array.has(index)) { 490 return array.getDescriptor(global, index); 491 } 492 493 return UNDEFINED; 494 } 495 496 /** 497 * ECMA 8.12.2 [[GetProperty]] (P) 498 * 499 * @param key property key 500 * 501 * @return Returns the fully populated Property Descriptor of the named property 502 * of this object, or undefined if absent. 503 */ 504 public Object getPropertyDescriptor(final String key) { 505 final Object res = getOwnPropertyDescriptor(key); 506 507 if (res != UNDEFINED) { 508 return res; 509 } else if (getProto() != null) { 510 return getProto().getOwnPropertyDescriptor(key); 511 } else { 512 return UNDEFINED; 513 } 514 } 515 516 /** 517 * Invalidate any existing global constant method handles that may exist for {@code key}. 518 * @param key the property name 519 */ 520 protected void invalidateGlobalConstant(final String key) { 521 final GlobalConstants globalConstants = getGlobalConstants(); 522 if (globalConstants != null) { 523 globalConstants.delete(key); 524 } 525 } 526 527 /** 528 * ECMA 8.12.9 [[DefineOwnProperty]] (P, Desc, Throw) 529 * 530 * @param key the property key 531 * @param propertyDesc the property descriptor 532 * @param reject is the property extensible - true means new definitions are rejected 533 * 534 * @return true if property was successfully defined 535 */ 536 public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) { 537 final Global global = Context.getGlobal(); 538 final PropertyDescriptor desc = toPropertyDescriptor(global, propertyDesc); 539 final Object current = getOwnPropertyDescriptor(key); 540 final String name = JSType.toString(key); 541 542 invalidateGlobalConstant(key); 543 544 if (current == UNDEFINED) { 545 if (isExtensible()) { 546 // add a new own property 547 addOwnProperty(key, desc); 548 return true; 549 } 550 // new property added to non-extensible object 551 if (reject) { 552 throw typeError(global, "object.non.extensible", name, ScriptRuntime.safeToString(this)); 553 } 554 return false; 555 } 556 557 // modifying an existing property 558 final PropertyDescriptor currentDesc = (PropertyDescriptor)current; 559 final PropertyDescriptor newDesc = desc; 560 561 if (newDesc.type() == PropertyDescriptor.GENERIC && !newDesc.has(CONFIGURABLE) && !newDesc.has(ENUMERABLE)) { 562 // every descriptor field is absent 563 return true; 564 } 565 566 if (newDesc.hasAndEquals(currentDesc)) { 567 // every descriptor field of the new is same as the current 568 return true; 569 } 570 571 if (!currentDesc.isConfigurable()) { 572 if (newDesc.has(CONFIGURABLE) && newDesc.isConfigurable()) { 573 // not configurable can not be made configurable 574 if (reject) { 575 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 576 } 577 return false; 578 } 579 580 if (newDesc.has(ENUMERABLE) && 581 currentDesc.isEnumerable() != newDesc.isEnumerable()) { 582 // cannot make non-enumerable as enumerable or vice-versa 583 if (reject) { 584 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 585 } 586 return false; 587 } 588 } 589 590 int propFlags = Property.mergeFlags(currentDesc, newDesc); 591 Property property = getMap().findProperty(key); 592 593 if (currentDesc.type() == PropertyDescriptor.DATA && 594 (newDesc.type() == PropertyDescriptor.DATA || 595 newDesc.type() == PropertyDescriptor.GENERIC)) { 596 if (!currentDesc.isConfigurable() && !currentDesc.isWritable()) { 597 if (newDesc.has(WRITABLE) && newDesc.isWritable() || 598 newDesc.has(VALUE) && !ScriptRuntime.sameValue(currentDesc.getValue(), newDesc.getValue())) { 599 if (reject) { 600 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 601 } 602 return false; 603 } 604 } 605 606 final boolean newValue = newDesc.has(VALUE); 607 final Object value = newValue ? newDesc.getValue() : currentDesc.getValue(); 608 609 if (newValue && property != null) { 610 // Temporarily clear flags. 611 property = modifyOwnProperty(property, 0); 612 set(key, value, 0); 613 //this might change the map if we change types of the property 614 //hence we need to read it again. note that we should probably 615 //have the setter return the new property throughout and in 616 //general respect Property return values from modify and add 617 //functions - which we don't seem to do at all here :-( 618 //There is already a bug filed to generify PropertyAccess so we 619 //can have the setter return e.g. a Property 620 property = getMap().findProperty(key); 621 } 622 623 if (property == null) { 624 // promoting an arrayData value to actual property 625 addOwnProperty(key, propFlags, value); 626 checkIntegerKey(key); 627 } else { 628 // Now set the new flags 629 modifyOwnProperty(property, propFlags); 630 } 631 } else if (currentDesc.type() == PropertyDescriptor.ACCESSOR && 632 (newDesc.type() == PropertyDescriptor.ACCESSOR || 633 newDesc.type() == PropertyDescriptor.GENERIC)) { 634 if (!currentDesc.isConfigurable()) { 635 if (newDesc.has(PropertyDescriptor.GET) && !ScriptRuntime.sameValue(currentDesc.getGetter(), newDesc.getGetter()) || 636 newDesc.has(PropertyDescriptor.SET) && !ScriptRuntime.sameValue(currentDesc.getSetter(), newDesc.getSetter())) { 637 if (reject) { 638 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 639 } 640 return false; 641 } 642 } 643 // New set the new features. 644 modifyOwnProperty(property, propFlags, 645 newDesc.has(GET) ? newDesc.getGetter() : currentDesc.getGetter(), 646 newDesc.has(SET) ? newDesc.getSetter() : currentDesc.getSetter()); 647 } else { 648 // changing descriptor type 649 if (!currentDesc.isConfigurable()) { 650 // not configurable can not be made configurable 651 if (reject) { 652 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this)); 653 } 654 return false; 655 } 656 657 propFlags = 0; 658 659 // Preserve only configurable and enumerable from current desc 660 // if those are not overridden in the new property descriptor. 661 boolean value = newDesc.has(CONFIGURABLE) ? newDesc.isConfigurable() : currentDesc.isConfigurable(); 662 if (!value) { 663 propFlags |= Property.NOT_CONFIGURABLE; 664 } 665 value = newDesc.has(ENUMERABLE)? newDesc.isEnumerable() : currentDesc.isEnumerable(); 666 if (!value) { 667 propFlags |= Property.NOT_ENUMERABLE; 668 } 669 670 final int type = newDesc.type(); 671 if (type == PropertyDescriptor.DATA) { 672 // get writable from the new descriptor 673 value = newDesc.has(WRITABLE) && newDesc.isWritable(); 674 if (!value) { 675 propFlags |= Property.NOT_WRITABLE; 676 } 677 678 // delete the old property 679 deleteOwnProperty(property); 680 // add new data property 681 addOwnProperty(key, propFlags, newDesc.getValue()); 682 } else if (type == PropertyDescriptor.ACCESSOR) { 683 if (property == null) { 684 addOwnProperty(key, propFlags, 685 newDesc.has(GET) ? newDesc.getGetter() : null, 686 newDesc.has(SET) ? newDesc.getSetter() : null); 687 } else { 688 // Modify old property with the new features. 689 modifyOwnProperty(property, propFlags, 690 newDesc.has(GET) ? newDesc.getGetter() : null, 691 newDesc.has(SET) ? newDesc.getSetter() : null); 692 } 693 } 694 } 695 696 checkIntegerKey(key); 697 698 return true; 699 } 700 701 /** 702 * Almost like defineOwnProperty(int,Object) for arrays this one does 703 * not add 'gap' elements (like the array one does). 704 * 705 * @param index key for property 706 * @param value value to define 707 */ 708 public void defineOwnProperty(final int index, final Object value) { 709 assert isValidArrayIndex(index) : "invalid array index"; 710 final long longIndex = ArrayIndex.toLongIndex(index); 711 final long oldLength = getArray().length(); 712 if (longIndex >= oldLength) { 713 setArray(getArray().ensure(longIndex)); 714 doesNotHaveEnsureDelete(longIndex, oldLength, false); 715 } 716 setArray(getArray().set(index, value, false)); 717 } 718 719 private void checkIntegerKey(final String key) { 720 final int index = getArrayIndex(key); 721 722 if (isValidArrayIndex(index)) { 723 final ArrayData data = getArray(); 724 725 if (data.has(index)) { 726 setArray(data.delete(index)); 727 } 728 } 729 } 730 731 /** 732 * Add a new property to the object. 733 * 734 * @param key property key 735 * @param propertyDesc property descriptor for property 736 */ 737 public final void addOwnProperty(final String key, final PropertyDescriptor propertyDesc) { 738 // Already checked that there is no own property with that key. 739 PropertyDescriptor pdesc = propertyDesc; 740 741 final int propFlags = Property.toFlags(pdesc); 742 743 if (pdesc.type() == PropertyDescriptor.GENERIC) { 744 final Global global = Context.getGlobal(); 745 final PropertyDescriptor dDesc = global.newDataDescriptor(UNDEFINED, false, false, false); 746 747 dDesc.fillFrom((ScriptObject)pdesc); 748 pdesc = dDesc; 749 } 750 751 final int type = pdesc.type(); 752 if (type == PropertyDescriptor.DATA) { 753 addOwnProperty(key, propFlags, pdesc.getValue()); 754 } else if (type == PropertyDescriptor.ACCESSOR) { 755 addOwnProperty(key, propFlags, 756 pdesc.has(GET) ? pdesc.getGetter() : null, 757 pdesc.has(SET) ? pdesc.getSetter() : null); 758 } 759 760 checkIntegerKey(key); 761 } 762 763 /** 764 * Low level property API (not using property descriptors) 765 * <p> 766 * Find a property in the prototype hierarchy. Note: this is final and not 767 * a good idea to override. If you have to, use 768 * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or 769 * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the 770 * overriding way to find array properties 771 * 772 * @see jdk.nashorn.internal.objects.NativeArray 773 * 774 * @param key Property key. 775 * @param deep Whether the search should look up proto chain. 776 * 777 * @return FindPropertyData or null if not found. 778 */ 779 public final FindProperty findProperty(final String key, final boolean deep) { 780 return findProperty(key, deep, this); 781 } 782 783 /** 784 * Low level property API (not using property descriptors) 785 * <p> 786 * Find a property in the prototype hierarchy. Note: this is not a good idea 787 * to override except as it was done in {@link WithObject}. 788 * If you have to, use 789 * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or 790 * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the 791 * overriding way to find array properties 792 * 793 * @see jdk.nashorn.internal.objects.NativeArray 794 * 795 * @param key Property key. 796 * @param deep Whether the search should look up proto chain. 797 * @param start the object on which the lookup was originally initiated 798 * 799 * @return FindPropertyData or null if not found. 800 */ 801 protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) { 802 803 final PropertyMap selfMap = getMap(); 804 final Property property = selfMap.findProperty(key); 805 806 if (property != null) { 807 return new FindProperty(start, this, property); 808 } 809 810 if (deep) { 811 final ScriptObject myProto = getProto(); 812 if (myProto != null) { 813 return myProto.findProperty(key, deep, start); 814 } 815 } 816 817 return null; 818 } 819 820 /** 821 * Low level property API. This is similar to {@link #findProperty(String, boolean)} but returns a 822 * {@code boolean} value instead of a {@link FindProperty} object. 823 * @param key Property key. 824 * @param deep Whether the search should look up proto chain. 825 * @return true if the property was found. 826 */ 827 boolean hasProperty(final String key, final boolean deep) { 828 if (getMap().findProperty(key) != null) { 829 return true; 830 } 831 832 if (deep) { 833 final ScriptObject myProto = getProto(); 834 if (myProto != null) { 835 return myProto.hasProperty(key, deep); 836 } 837 } 838 839 return false; 840 } 841 842 private SwitchPoint findBuiltinSwitchPoint(final String key) { 843 for (ScriptObject myProto = getProto(); myProto != null; myProto = myProto.getProto()) { 844 final Property prop = myProto.getMap().findProperty(key); 845 if (prop != null) { 846 final SwitchPoint sp = prop.getBuiltinSwitchPoint(); 847 if (sp != null && !sp.hasBeenInvalidated()) { 848 return sp; 849 } 850 } 851 } 852 return null; 853 } 854 855 /** 856 * Add a new property to the object. 857 * <p> 858 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s 859 * 860 * @param key Property key. 861 * @param propertyFlags Property flags. 862 * @param getter Property getter, or null if not defined 863 * @param setter Property setter, or null if not defined 864 * 865 * @return New property. 866 */ 867 public final Property addOwnProperty(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 868 return addOwnProperty(newUserAccessors(key, propertyFlags, getter, setter)); 869 } 870 871 /** 872 * Add a new property to the object. 873 * <p> 874 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s 875 * 876 * @param key Property key. 877 * @param propertyFlags Property flags. 878 * @param value Value of property 879 * 880 * @return New property. 881 */ 882 public final Property addOwnProperty(final String key, final int propertyFlags, final Object value) { 883 return addSpillProperty(key, propertyFlags, value, true); 884 } 885 886 /** 887 * Add a new property to the object. 888 * <p> 889 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s 890 * 891 * @param newProperty property to add 892 * 893 * @return New property. 894 */ 895 public final Property addOwnProperty(final Property newProperty) { 896 PropertyMap oldMap = getMap(); 897 while (true) { 898 final PropertyMap newMap = oldMap.addProperty(newProperty); 899 if (!compareAndSetMap(oldMap, newMap)) { 900 oldMap = getMap(); 901 final Property oldProperty = oldMap.findProperty(newProperty.getKey()); 902 903 if (oldProperty != null) { 904 return oldProperty; 905 } 906 } else { 907 return newProperty; 908 } 909 } 910 } 911 912 private void erasePropertyValue(final Property property) { 913 // Erase the property field value with undefined. If the property is defined 914 // by user-defined accessors, we don't want to call the setter!! 915 if (!(property instanceof UserAccessorProperty)) { 916 assert property != null; 917 property.setValue(this, this, UNDEFINED, false); 918 } 919 } 920 921 /** 922 * Delete a property from the object. 923 * 924 * @param property Property to delete. 925 * 926 * @return true if deleted. 927 */ 928 public final boolean deleteOwnProperty(final Property property) { 929 erasePropertyValue(property); 930 PropertyMap oldMap = getMap(); 931 932 while (true) { 933 final PropertyMap newMap = oldMap.deleteProperty(property); 934 935 if (newMap == null) { 936 return false; 937 } 938 939 if (!compareAndSetMap(oldMap, newMap)) { 940 oldMap = getMap(); 941 } else { 942 // delete getter and setter function references so that we don't leak 943 if (property instanceof UserAccessorProperty) { 944 ((UserAccessorProperty)property).setAccessors(this, getMap(), null); 945 } 946 947 invalidateGlobalConstant(property.getKey()); 948 return true; 949 } 950 } 951 952 } 953 954 /** 955 * Fast initialization functions for ScriptFunctions that are strict, to avoid 956 * creating setters that probably aren't used. Inject directly into the spill pool 957 * the defaults for "arguments" and "caller" 958 * 959 * @param key property key 960 * @param propertyFlags flags 961 * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A 962 * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A 963 */ 964 protected final void initUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 965 final PropertyMap oldMap = getMap(); 966 final int slot = oldMap.getFreeSpillSlot(); 967 ensureSpillSize(slot); 968 objectSpill[slot] = new UserAccessorProperty.Accessors(getter, setter); 969 Property newProperty; 970 PropertyMap newMap; 971 do { 972 newProperty = new UserAccessorProperty(key, propertyFlags, slot); 973 newMap = oldMap.addProperty(newProperty); 974 } while (!compareAndSetMap(oldMap, newMap)); 975 } 976 977 /** 978 * Modify a property in the object 979 * 980 * @param oldProperty property to modify 981 * @param propertyFlags new property flags 982 * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A 983 * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A 984 * 985 * @return new property 986 */ 987 public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 988 Property newProperty; 989 990 if (oldProperty instanceof UserAccessorProperty) { 991 final UserAccessorProperty uc = (UserAccessorProperty)oldProperty; 992 final int slot = uc.getSlot(); 993 994 assert uc.getLocalType() == Object.class; 995 final UserAccessorProperty.Accessors gs = uc.getAccessors(this); //this crashes 996 assert gs != null; 997 //reuse existing getter setter for speed 998 gs.set(getter, setter); 999 if (uc.getFlags() == propertyFlags) { 1000 return oldProperty; 1001 } 1002 newProperty = new UserAccessorProperty(uc.getKey(), propertyFlags, slot); 1003 } else { 1004 // erase old property value and create new user accessor property 1005 erasePropertyValue(oldProperty); 1006 newProperty = newUserAccessors(oldProperty.getKey(), propertyFlags, getter, setter); 1007 } 1008 1009 return modifyOwnProperty(oldProperty, newProperty); 1010 } 1011 1012 /** 1013 * Modify a property in the object 1014 * 1015 * @param oldProperty property to modify 1016 * @param propertyFlags new property flags 1017 * 1018 * @return new property 1019 */ 1020 public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags) { 1021 return modifyOwnProperty(oldProperty, oldProperty.setFlags(propertyFlags)); 1022 } 1023 1024 /** 1025 * Modify a property in the object, replacing a property with a new one 1026 * 1027 * @param oldProperty property to replace 1028 * @param newProperty property to replace it with 1029 * 1030 * @return new property 1031 */ 1032 private Property modifyOwnProperty(final Property oldProperty, final Property newProperty) { 1033 if (oldProperty == newProperty) { 1034 return newProperty; //nop 1035 } 1036 1037 assert newProperty.getKey().equals(oldProperty.getKey()) : "replacing property with different key"; 1038 1039 PropertyMap oldMap = getMap(); 1040 1041 while (true) { 1042 final PropertyMap newMap = oldMap.replaceProperty(oldProperty, newProperty); 1043 1044 if (!compareAndSetMap(oldMap, newMap)) { 1045 oldMap = getMap(); 1046 final Property oldPropertyLookup = oldMap.findProperty(oldProperty.getKey()); 1047 1048 if (oldPropertyLookup != null && oldPropertyLookup.equals(newProperty)) { 1049 return oldPropertyLookup; 1050 } 1051 } else { 1052 return newProperty; 1053 } 1054 } 1055 } 1056 1057 /** 1058 * Update getter and setter in an object literal. 1059 * 1060 * @param key Property key. 1061 * @param getter {@link UserAccessorProperty} defined getter, or null if none 1062 * @param setter {@link UserAccessorProperty} defined setter, or null if none 1063 */ 1064 public final void setUserAccessors(final String key, final ScriptFunction getter, final ScriptFunction setter) { 1065 final Property oldProperty = getMap().findProperty(key); 1066 if (oldProperty instanceof UserAccessorProperty) { 1067 modifyOwnProperty(oldProperty, oldProperty.getFlags(), getter, setter); 1068 } else { 1069 addOwnProperty(newUserAccessors(key, oldProperty != null ? oldProperty.getFlags() : 0, getter, setter)); 1070 } 1071 } 1072 1073 private static int getIntValue(final FindProperty find, final int programPoint) { 1074 final MethodHandle getter = find.getGetter(int.class, programPoint, null); 1075 if (getter != null) { 1076 try { 1077 return (int)getter.invokeExact((Object)find.getGetterReceiver()); 1078 } catch (final Error|RuntimeException e) { 1079 throw e; 1080 } catch (final Throwable e) { 1081 throw new RuntimeException(e); 1082 } 1083 } 1084 1085 return UNDEFINED_INT; 1086 } 1087 1088 private static long getLongValue(final FindProperty find, final int programPoint) { 1089 final MethodHandle getter = find.getGetter(long.class, programPoint, null); 1090 if (getter != null) { 1091 try { 1092 return (long)getter.invokeExact((Object)find.getGetterReceiver()); 1093 } catch (final Error|RuntimeException e) { 1094 throw e; 1095 } catch (final Throwable e) { 1096 throw new RuntimeException(e); 1097 } 1098 } 1099 1100 return UNDEFINED_LONG; 1101 } 1102 1103 private static double getDoubleValue(final FindProperty find, final int programPoint) { 1104 final MethodHandle getter = find.getGetter(double.class, programPoint, null); 1105 if (getter != null) { 1106 try { 1107 return (double)getter.invokeExact((Object)find.getGetterReceiver()); 1108 } catch (final Error|RuntimeException e) { 1109 throw e; 1110 } catch (final Throwable e) { 1111 throw new RuntimeException(e); 1112 } 1113 } 1114 1115 return UNDEFINED_DOUBLE; 1116 } 1117 1118 /** 1119 * Return methodHandle of value function for call. 1120 * 1121 * @param find data from find property. 1122 * @param type method type of function. 1123 * @param bindName null or name to bind to second argument (property not found method.) 1124 * 1125 * @return value of property as a MethodHandle or null. 1126 */ 1127 protected MethodHandle getCallMethodHandle(final FindProperty find, final MethodType type, final String bindName) { 1128 return getCallMethodHandle(find.getObjectValue(), type, bindName); 1129 } 1130 1131 /** 1132 * Return methodHandle of value function for call. 1133 * 1134 * @param value value of receiver, it not a {@link ScriptFunction} this will return null. 1135 * @param type method type of function. 1136 * @param bindName null or name to bind to second argument (property not found method.) 1137 * 1138 * @return value of property as a MethodHandle or null. 1139 */ 1140 protected static MethodHandle getCallMethodHandle(final Object value, final MethodType type, final String bindName) { 1141 return value instanceof ScriptFunction ? ((ScriptFunction)value).getCallMethodHandle(type, bindName) : null; 1142 } 1143 1144 /** 1145 * Get value using found property. 1146 * 1147 * @param property Found property. 1148 * 1149 * @return Value of property. 1150 */ 1151 public final Object getWithProperty(final Property property) { 1152 return new FindProperty(this, this, property).getObjectValue(); 1153 } 1154 1155 /** 1156 * Get a property given a key 1157 * 1158 * @param key property key 1159 * 1160 * @return property for key 1161 */ 1162 public final Property getProperty(final String key) { 1163 return getMap().findProperty(key); 1164 } 1165 1166 /** 1167 * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.) 1168 * Used for argument access in a vararg function using parameter name. 1169 * Returns the argument at a given key (index) 1170 * 1171 * @param key argument index 1172 * 1173 * @return the argument at the given position, or undefined if not present 1174 */ 1175 public Object getArgument(final int key) { 1176 return get(key); 1177 } 1178 1179 /** 1180 * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.) 1181 * Used for argument access in a vararg function using parameter name. 1182 * Returns the argument at a given key (index) 1183 * 1184 * @param key argument index 1185 * @param value the value to write at the given index 1186 */ 1187 public void setArgument(final int key, final Object value) { 1188 set(key, value, 0); 1189 } 1190 1191 /** 1192 * Return the current context from the object's map. 1193 * @return Current context. 1194 */ 1195 protected Context getContext() { 1196 return Context.fromClass(getClass()); 1197 } 1198 1199 /** 1200 * Return the map of an object. 1201 * @return PropertyMap object. 1202 */ 1203 public final PropertyMap getMap() { 1204 return map; 1205 } 1206 1207 /** 1208 * Set the initial map. 1209 * @param map Initial map. 1210 */ 1211 public final void setMap(final PropertyMap map) { 1212 this.map = map; 1213 } 1214 1215 /** 1216 * Conditionally set the new map if the old map is the same. 1217 * @param oldMap Map prior to manipulation. 1218 * @param newMap Replacement map. 1219 * @return true if the operation succeeded. 1220 */ 1221 protected final boolean compareAndSetMap(final PropertyMap oldMap, final PropertyMap newMap) { 1222 if (oldMap == this.map) { 1223 this.map = newMap; 1224 return true; 1225 } 1226 return false; 1227 } 1228 1229 /** 1230 * Return the __proto__ of an object. 1231 * @return __proto__ object. 1232 */ 1233 public final ScriptObject getProto() { 1234 return proto; 1235 } 1236 1237 /** 1238 * Get the proto of a specific depth 1239 * @param n depth 1240 * @return proto at given depth 1241 */ 1242 public final ScriptObject getProto(final int n) { 1243 assert n > 0; 1244 ScriptObject p = getProto(); 1245 for (int i = n; i-- > 0;) { 1246 p = p.getProto(); 1247 } 1248 return p; 1249 } 1250 1251 /** 1252 * Set the __proto__ of an object. 1253 * @param newProto new __proto__ to set. 1254 */ 1255 public final void setProto(final ScriptObject newProto) { 1256 final ScriptObject oldProto = proto; 1257 1258 if (oldProto != newProto) { 1259 proto = newProto; 1260 1261 // Let current listeners know that the prototype has changed and set our map 1262 final PropertyListeners listeners = getMap().getListeners(); 1263 if (listeners != null) { 1264 listeners.protoChanged(); 1265 } 1266 // Replace our current allocator map with one that is associated with the new prototype. 1267 setMap(getMap().changeProto(newProto)); 1268 } 1269 } 1270 1271 /** 1272 * Set the initial __proto__ of this object. This should be used instead of 1273 * {@link #setProto} if it is known that the current property map will not be 1274 * used on a new object with any other parent property map, so we can pass over 1275 * property map invalidation/evolution. 1276 * 1277 * @param initialProto the initial __proto__ to set. 1278 */ 1279 public void setInitialProto(final ScriptObject initialProto) { 1280 this.proto = initialProto; 1281 } 1282 1283 /** 1284 * Invoked from generated bytecode to initialize the prototype of object literals to the global Object prototype. 1285 * @param obj the object literal that needs to have its prototype initialized to the global Object prototype. 1286 */ 1287 public static void setGlobalObjectProto(final ScriptObject obj) { 1288 obj.setInitialProto(Global.objectPrototype()); 1289 } 1290 1291 /** 1292 * Set the __proto__ of an object with checks. 1293 * This is the built-in operation [[SetPrototypeOf]] 1294 * See ES6 draft spec: 9.1.2 [[SetPrototypeOf]] (V) 1295 * 1296 * @param newProto Prototype to set. 1297 */ 1298 public final void setPrototypeOf(final Object newProto) { 1299 if (newProto == null || newProto instanceof ScriptObject) { 1300 if (! isExtensible()) { 1301 // okay to set same proto again - even if non-extensible 1302 1303 if (newProto == getProto()) { 1304 return; 1305 } 1306 throw typeError("__proto__.set.non.extensible", ScriptRuntime.safeToString(this)); 1307 } 1308 1309 // check for circularity 1310 ScriptObject p = (ScriptObject)newProto; 1311 while (p != null) { 1312 if (p == this) { 1313 throw typeError("circular.__proto__.set", ScriptRuntime.safeToString(this)); 1314 } 1315 p = p.getProto(); 1316 } 1317 setProto((ScriptObject)newProto); 1318 } else { 1319 throw typeError("cant.set.proto.to.non.object", ScriptRuntime.safeToString(this), ScriptRuntime.safeToString(newProto)); 1320 } 1321 } 1322 1323 /** 1324 * Set the __proto__ of an object from an object literal. 1325 * See ES6 draft spec: B.3.1 __proto__ Property Names in 1326 * Object Initializers. Step 6 handling of "__proto__". 1327 * 1328 * @param newProto Prototype to set. 1329 */ 1330 public final void setProtoFromLiteral(final Object newProto) { 1331 if (newProto == null || newProto instanceof ScriptObject) { 1332 setPrototypeOf(newProto); 1333 } else { 1334 // Some non-object, non-null. Then, we need to set 1335 // Object.prototype as the new __proto__ 1336 // 1337 // var obj = { __proto__ : 34 }; 1338 // print(obj.__proto__ === Object.prototype); // => true 1339 setPrototypeOf(Global.objectPrototype()); 1340 } 1341 } 1342 1343 /** 1344 * return an array of all property keys - all inherited, non-enumerable included. 1345 * This is meant for source code completion by interactive shells or editors. 1346 * 1347 * @return Array of keys, order of properties is undefined. 1348 */ 1349 public String[] getAllKeys() { 1350 final Set<String> keys = new HashSet<>(); 1351 final Set<String> nonEnumerable = new HashSet<>(); 1352 for (ScriptObject self = this; self != null; self = self.getProto()) { 1353 keys.addAll(Arrays.asList(self.getOwnKeys(true, nonEnumerable))); 1354 } 1355 return keys.toArray(new String[keys.size()]); 1356 } 1357 1358 /** 1359 * return an array of own property keys associated with the object. 1360 * 1361 * @param all True if to include non-enumerable keys. 1362 * @return Array of keys. 1363 */ 1364 public final String[] getOwnKeys(final boolean all) { 1365 return getOwnKeys(all, null); 1366 } 1367 1368 /** 1369 * return an array of own property keys associated with the object. 1370 * 1371 * @param all True if to include non-enumerable keys. 1372 * @param nonEnumerable set of non-enumerable properties seen already.Used 1373 to filter out shadowed, but enumerable properties from proto children. 1374 * @return Array of keys. 1375 */ 1376 protected String[] getOwnKeys(final boolean all, final Set<String> nonEnumerable) { 1377 final List<Object> keys = new ArrayList<>(); 1378 final PropertyMap selfMap = this.getMap(); 1379 1380 final ArrayData array = getArray(); 1381 1382 for (final Iterator<Long> iter = array.indexIterator(); iter.hasNext(); ) { 1383 keys.add(JSType.toString(iter.next().longValue())); 1384 } 1385 1386 for (final Property property : selfMap.getProperties()) { 1387 final boolean enumerable = property.isEnumerable(); 1388 final String key = property.getKey(); 1389 if (all) { 1390 keys.add(key); 1391 } else if (enumerable) { 1392 // either we don't have non-enumerable filter set or filter set 1393 // does not contain the current property. 1394 if (nonEnumerable == null || !nonEnumerable.contains(key)) { 1395 keys.add(key); 1396 } 1397 } else { 1398 // store this non-enumerable property for later proto walk 1399 if (nonEnumerable != null) { 1400 nonEnumerable.add(key); 1401 } 1402 } 1403 } 1404 1405 return keys.toArray(new String[keys.size()]); 1406 } 1407 1408 /** 1409 * Check if this ScriptObject has array entries. This means that someone has 1410 * set values with numeric keys in the object. 1411 * 1412 * @return true if array entries exists. 1413 */ 1414 public boolean hasArrayEntries() { 1415 return getArray().length() > 0 || getMap().containsArrayKeys(); 1416 } 1417 1418 /** 1419 * Return the valid JavaScript type name descriptor 1420 * 1421 * @return "Object" 1422 */ 1423 public String getClassName() { 1424 return "Object"; 1425 } 1426 1427 /** 1428 * {@code length} is a well known property. This is its getter. 1429 * Note that this *may* be optimized by other classes 1430 * 1431 * @return length property value for this ScriptObject 1432 */ 1433 public Object getLength() { 1434 return get("length"); 1435 } 1436 1437 /** 1438 * Stateless toString for ScriptObjects. 1439 * 1440 * @return string description of this object, e.g. {@code [object Object]} 1441 */ 1442 public String safeToString() { 1443 return "[object " + getClassName() + "]"; 1444 } 1445 1446 /** 1447 * Return the default value of the object with a given preferred type hint. 1448 * The preferred type hints are String.class for type String, Number.class 1449 * for type Number. <p> 1450 * 1451 * A <code>hint</code> of null means "no hint". 1452 * 1453 * ECMA 8.12.8 [[DefaultValue]](hint) 1454 * 1455 * @param typeHint the preferred type hint 1456 * @return the default value 1457 */ 1458 public Object getDefaultValue(final Class<?> typeHint) { 1459 // We delegate to Global, as the implementation uses dynamic call sites to invoke object's "toString" and 1460 // "valueOf" methods, and in order to avoid those call sites from becoming megamorphic when multiple contexts 1461 // are being executed in a long-running program, we move the code and their associated dynamic call sites 1462 // (Global.TO_STRING and Global.VALUE_OF) into per-context code. 1463 return Context.getGlobal().getDefaultValue(this, typeHint); 1464 } 1465 1466 /** 1467 * Checking whether a script object is an instance of another. Used 1468 * in {@link ScriptFunction} for hasInstance implementation, walks 1469 * the proto chain 1470 * 1471 * @param instance instance to check 1472 * @return true if 'instance' is an instance of this object 1473 */ 1474 public boolean isInstance(final ScriptObject instance) { 1475 return false; 1476 } 1477 1478 /** 1479 * Flag this ScriptObject as non extensible 1480 * 1481 * @return the object after being made non extensible 1482 */ 1483 public ScriptObject preventExtensions() { 1484 PropertyMap oldMap = getMap(); 1485 while (!compareAndSetMap(oldMap, getMap().preventExtensions())) { 1486 oldMap = getMap(); 1487 } 1488 1489 //invalidate any fast array setters 1490 final ArrayData array = getArray(); 1491 assert array != null; 1492 setArray(ArrayData.preventExtension(array)); 1493 return this; 1494 } 1495 1496 /** 1497 * Check whether if an Object (not just a ScriptObject) represents JavaScript array 1498 * 1499 * @param obj object to check 1500 * 1501 * @return true if array 1502 */ 1503 public static boolean isArray(final Object obj) { 1504 return obj instanceof ScriptObject && ((ScriptObject)obj).isArray(); 1505 } 1506 1507 /** 1508 * Check if this ScriptObject is an array 1509 * @return true if array 1510 */ 1511 public final boolean isArray() { 1512 return (flags & IS_ARRAY) != 0; 1513 } 1514 1515 /** 1516 * Flag this ScriptObject as being an array 1517 */ 1518 public final void setIsArray() { 1519 flags |= IS_ARRAY; 1520 } 1521 1522 /** 1523 * Check if this ScriptObject is an {@code arguments} vector 1524 * @return true if arguments vector 1525 */ 1526 public final boolean isArguments() { 1527 return (flags & IS_ARGUMENTS) != 0; 1528 } 1529 1530 /** 1531 * Flag this ScriptObject as being an {@code arguments} vector 1532 */ 1533 public final void setIsArguments() { 1534 flags |= IS_ARGUMENTS; 1535 } 1536 1537 /** 1538 * Check if this object has non-writable length property 1539 * 1540 * @return {@code true} if 'length' property is non-writable 1541 */ 1542 public boolean isLengthNotWritable() { 1543 return (flags & IS_LENGTH_NOT_WRITABLE) != 0; 1544 } 1545 1546 /** 1547 * Flag this object as having non-writable length property. 1548 */ 1549 public void setIsLengthNotWritable() { 1550 flags |= IS_LENGTH_NOT_WRITABLE; 1551 } 1552 1553 /** 1554 * Get the {@link ArrayData}, for this ScriptObject, ensuring it is of a type 1555 * that can handle elementType 1556 * @param elementType elementType 1557 * @return array data 1558 */ 1559 public final ArrayData getArray(final Class<?> elementType) { 1560 if (elementType == null) { 1561 return arrayData; 1562 } 1563 final ArrayData newArrayData = arrayData.convert(elementType); 1564 if (newArrayData != arrayData) { 1565 arrayData = newArrayData; 1566 } 1567 return newArrayData; 1568 } 1569 1570 /** 1571 * Get the {@link ArrayData} for this ScriptObject if it is an array 1572 * @return array data 1573 */ 1574 public final ArrayData getArray() { 1575 return arrayData; 1576 } 1577 1578 /** 1579 * Set the {@link ArrayData} for this ScriptObject if it is to be an array 1580 * @param arrayData the array data 1581 */ 1582 public final void setArray(final ArrayData arrayData) { 1583 this.arrayData = arrayData; 1584 } 1585 1586 /** 1587 * Check if this ScriptObject is extensible 1588 * @return true if extensible 1589 */ 1590 public boolean isExtensible() { 1591 return getMap().isExtensible(); 1592 } 1593 1594 /** 1595 * ECMAScript 15.2.3.8 - seal implementation 1596 * @return the sealed ScriptObject 1597 */ 1598 public ScriptObject seal() { 1599 PropertyMap oldMap = getMap(); 1600 1601 while (true) { 1602 final PropertyMap newMap = getMap().seal(); 1603 1604 if (!compareAndSetMap(oldMap, newMap)) { 1605 oldMap = getMap(); 1606 } else { 1607 setArray(ArrayData.seal(getArray())); 1608 return this; 1609 } 1610 } 1611 } 1612 1613 /** 1614 * Check whether this ScriptObject is sealed 1615 * @return true if sealed 1616 */ 1617 public boolean isSealed() { 1618 return getMap().isSealed(); 1619 } 1620 1621 /** 1622 * ECMA 15.2.39 - freeze implementation. Freeze this ScriptObject 1623 * @return the frozen ScriptObject 1624 */ 1625 public ScriptObject freeze() { 1626 PropertyMap oldMap = getMap(); 1627 1628 while (true) { 1629 final PropertyMap newMap = getMap().freeze(); 1630 1631 if (!compareAndSetMap(oldMap, newMap)) { 1632 oldMap = getMap(); 1633 } else { 1634 setArray(ArrayData.freeze(getArray())); 1635 return this; 1636 } 1637 } 1638 } 1639 1640 /** 1641 * Check whether this ScriptObject is frozen 1642 * @return true if frozen 1643 */ 1644 public boolean isFrozen() { 1645 return getMap().isFrozen(); 1646 } 1647 1648 /** 1649 * Check whether this ScriptObject is scope 1650 * @return true if scope 1651 */ 1652 public boolean isScope() { 1653 return false; 1654 } 1655 1656 /** 1657 * Tag this script object as built in 1658 */ 1659 public final void setIsBuiltin() { 1660 flags |= IS_BUILTIN; 1661 } 1662 1663 /** 1664 * Check if this script object is built in 1665 * @return true if build in 1666 */ 1667 public final boolean isBuiltin() { 1668 return (flags & IS_BUILTIN) != 0; 1669 } 1670 1671 /** 1672 * Clears the properties from a ScriptObject 1673 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1674 * 1675 * @param strict strict mode or not 1676 */ 1677 public void clear(final boolean strict) { 1678 final Iterator<String> iter = propertyIterator(); 1679 while (iter.hasNext()) { 1680 delete(iter.next(), strict); 1681 } 1682 } 1683 1684 /** 1685 * Checks if a property with a given key is present in a ScriptObject 1686 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1687 * 1688 * @param key the key to check for 1689 * @return true if a property with the given key exists, false otherwise 1690 */ 1691 public boolean containsKey(final Object key) { 1692 return has(key); 1693 } 1694 1695 /** 1696 * Checks if a property with a given value is present in a ScriptObject 1697 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1698 * 1699 * @param value value to check for 1700 * @return true if a property with the given value exists, false otherwise 1701 */ 1702 public boolean containsValue(final Object value) { 1703 final Iterator<Object> iter = valueIterator(); 1704 while (iter.hasNext()) { 1705 if (iter.next().equals(value)) { 1706 return true; 1707 } 1708 } 1709 return false; 1710 } 1711 1712 /** 1713 * Returns the set of {@literal <property, value>} entries that make up this 1714 * ScriptObject's properties 1715 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1716 * 1717 * @return an entry set of all the properties in this object 1718 */ 1719 public Set<Map.Entry<Object, Object>> entrySet() { 1720 final Iterator<String> iter = propertyIterator(); 1721 final Set<Map.Entry<Object, Object>> entries = new HashSet<>(); 1722 while (iter.hasNext()) { 1723 final Object key = iter.next(); 1724 entries.add(new AbstractMap.SimpleImmutableEntry<>(key, get(key))); 1725 } 1726 return Collections.unmodifiableSet(entries); 1727 } 1728 1729 /** 1730 * Check whether a ScriptObject contains no properties 1731 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1732 * 1733 * @return true if object has no properties 1734 */ 1735 public boolean isEmpty() { 1736 return !propertyIterator().hasNext(); 1737 } 1738 1739 /** 1740 * Return the set of keys (property names) for all properties 1741 * in this ScriptObject 1742 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1743 * 1744 * @return keySet of this ScriptObject 1745 */ 1746 public Set<Object> keySet() { 1747 final Iterator<String> iter = propertyIterator(); 1748 final Set<Object> keySet = new HashSet<>(); 1749 while (iter.hasNext()) { 1750 keySet.add(iter.next()); 1751 } 1752 return Collections.unmodifiableSet(keySet); 1753 } 1754 1755 /** 1756 * Put a property in the ScriptObject 1757 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1758 * 1759 * @param key property key 1760 * @param value property value 1761 * @param strict strict mode or not 1762 * @return oldValue if property with same key existed already 1763 */ 1764 public Object put(final Object key, final Object value, final boolean strict) { 1765 final Object oldValue = get(key); 1766 final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0; 1767 set(key, value, scriptObjectFlags); 1768 return oldValue; 1769 } 1770 1771 /** 1772 * Put several properties in the ScriptObject given a mapping 1773 * of their keys to their values 1774 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1775 * 1776 * @param otherMap a {@literal <key,value>} map of properties to add 1777 * @param strict strict mode or not 1778 */ 1779 public void putAll(final Map<?, ?> otherMap, final boolean strict) { 1780 final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0; 1781 for (final Map.Entry<?, ?> entry : otherMap.entrySet()) { 1782 set(entry.getKey(), entry.getValue(), scriptObjectFlags); 1783 } 1784 } 1785 1786 /** 1787 * Remove a property from the ScriptObject. 1788 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1789 * 1790 * @param key the key of the property 1791 * @param strict strict mode or not 1792 * @return the oldValue of the removed property 1793 */ 1794 public Object remove(final Object key, final boolean strict) { 1795 final Object oldValue = get(key); 1796 delete(key, strict); 1797 return oldValue; 1798 } 1799 1800 /** 1801 * Return the size of the ScriptObject - i.e. the number of properties 1802 * it contains 1803 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1804 * 1805 * @return number of properties in ScriptObject 1806 */ 1807 public int size() { 1808 int n = 0; 1809 for (final Iterator<String> iter = propertyIterator(); iter.hasNext(); iter.next()) { 1810 n++; 1811 } 1812 return n; 1813 } 1814 1815 /** 1816 * Return the values of the properties in the ScriptObject 1817 * (java.util.Map-like method to help ScriptObjectMirror implementation) 1818 * 1819 * @return collection of values for the properties in this ScriptObject 1820 */ 1821 public Collection<Object> values() { 1822 final List<Object> values = new ArrayList<>(size()); 1823 final Iterator<Object> iter = valueIterator(); 1824 while (iter.hasNext()) { 1825 values.add(iter.next()); 1826 } 1827 return Collections.unmodifiableList(values); 1828 } 1829 1830 /** 1831 * Lookup method that, given a CallSiteDescriptor, looks up the target 1832 * MethodHandle and creates a GuardedInvocation 1833 * with the appropriate guard(s). 1834 * 1835 * @param desc call site descriptor 1836 * @param request the link request 1837 * 1838 * @return GuardedInvocation for the callsite 1839 */ 1840 public GuardedInvocation lookup(final CallSiteDescriptor desc, final LinkRequest request) { 1841 final int c = desc.getNameTokenCount(); 1842 // JavaScript is "immune" to all currently defined Dynalink composite operation - getProp is the same as getElem 1843 // is the same as getMethod as JavaScript objects have a single namespace for all three. Therefore, we don't 1844 // care about them, and just link to whatever is the first operation. 1845 final String operator = CallSiteDescriptorFactory.tokenizeOperators(desc).get(0); 1846 // NOTE: we support getElem and setItem as JavaScript doesn't distinguish items from properties. Nashorn itself 1847 // emits "dyn:getProp:identifier" for "<expr>.<identifier>" and "dyn:getElem" for "<expr>[<expr>]", but we are 1848 // more flexible here and dispatch not on operation name (getProp vs. getElem), but rather on whether the 1849 // operation has an associated name or not. 1850 switch (operator) { 1851 case "getProp": 1852 case "getElem": 1853 case "getMethod": 1854 return c > 2 ? findGetMethod(desc, request, operator) : findGetIndexMethod(desc, request); 1855 case "setProp": 1856 case "setElem": 1857 return c > 2 ? findSetMethod(desc, request) : findSetIndexMethod(desc, request); 1858 case "call": 1859 return findCallMethod(desc, request); 1860 case "new": 1861 return findNewMethod(desc, request); 1862 case "callMethod": 1863 return findCallMethodMethod(desc, request); 1864 default: 1865 return null; 1866 } 1867 } 1868 1869 /** 1870 * Find the appropriate New method for an invoke dynamic call. 1871 * 1872 * @param desc The invoke dynamic call site descriptor. 1873 * @param request The link request 1874 * 1875 * @return GuardedInvocation to be invoked at call site. 1876 */ 1877 protected GuardedInvocation findNewMethod(final CallSiteDescriptor desc, final LinkRequest request) { 1878 return notAFunction(desc); 1879 } 1880 1881 /** 1882 * Find the appropriate CALL method for an invoke dynamic call. 1883 * This generates "not a function" always 1884 * 1885 * @param desc the call site descriptor. 1886 * @param request the link request 1887 * 1888 * @return GuardedInvocation to be invoked at call site. 1889 */ 1890 protected GuardedInvocation findCallMethod(final CallSiteDescriptor desc, final LinkRequest request) { 1891 return notAFunction(desc); 1892 } 1893 1894 private GuardedInvocation notAFunction(final CallSiteDescriptor desc) { 1895 throw typeError("not.a.function", NashornCallSiteDescriptor.getFunctionErrorMessage(desc, this)); 1896 } 1897 1898 /** 1899 * Find an implementation for a "dyn:callMethod" operation. Note that Nashorn internally never uses 1900 * "dyn:callMethod", but instead always emits two call sites in bytecode, one for "dyn:getMethod", and then another 1901 * one for "dyn:call". Explicit support for "dyn:callMethod" is provided for the benefit of potential external 1902 * callers. The implementation itself actually folds a "dyn:getMethod" method handle into a "dyn:call" method handle. 1903 * 1904 * @param desc the call site descriptor. 1905 * @param request the link request 1906 * 1907 * @return GuardedInvocation to be invoked at call site. 1908 */ 1909 protected GuardedInvocation findCallMethodMethod(final CallSiteDescriptor desc, final LinkRequest request) { 1910 // R(P0, P1, ...) 1911 final MethodType callType = desc.getMethodType(); 1912 // use type Object(P0) for the getter 1913 final CallSiteDescriptor getterType = desc.changeMethodType(MethodType.methodType(Object.class, callType.parameterType(0))); 1914 final GuardedInvocation getter = findGetMethod(getterType, request, "getMethod"); 1915 1916 // Object(P0) => Object(P0, P1, ...) 1917 final MethodHandle argDroppingGetter = MH.dropArguments(getter.getInvocation(), 1, callType.parameterList().subList(1, callType.parameterCount())); 1918 // R(Object, P0, P1, ...) 1919 final MethodHandle invoker = Bootstrap.createDynamicInvoker("dyn:call", callType.insertParameterTypes(0, argDroppingGetter.type().returnType())); 1920 // Fold Object(P0, P1, ...) into R(Object, P0, P1, ...) => R(P0, P1, ...) 1921 return getter.replaceMethods(MH.foldArguments(invoker, argDroppingGetter), getter.getGuard()); 1922 } 1923 1924 /** 1925 * Test whether this object contains in its prototype chain or is itself a with-object. 1926 * @return true if a with-object was found 1927 */ 1928 boolean hasWithScope() { 1929 return false; 1930 } 1931 1932 /** 1933 * Add a filter to the first argument of {@code methodHandle} that calls its {@link #getProto()} method 1934 * {@code depth} times. 1935 * @param methodHandle a method handle 1936 * @param depth distance to target prototype 1937 * @return the filtered method handle 1938 */ 1939 static MethodHandle addProtoFilter(final MethodHandle methodHandle, final int depth) { 1940 if (depth == 0) { 1941 return methodHandle; 1942 } 1943 final int listIndex = depth - 1; // We don't need 0-deep walker 1944 MethodHandle filter = listIndex < PROTO_FILTERS.size() ? PROTO_FILTERS.get(listIndex) : null; 1945 1946 if (filter == null) { 1947 filter = addProtoFilter(GETPROTO, depth - 1); 1948 PROTO_FILTERS.add(null); 1949 PROTO_FILTERS.set(listIndex, filter); 1950 } 1951 1952 return MH.filterArguments(methodHandle, 0, filter.asType(filter.type().changeReturnType(methodHandle.type().parameterType(0)))); 1953 } 1954 1955 /** 1956 * Find the appropriate GET method for an invoke dynamic call. 1957 * 1958 * @param desc the call site descriptor 1959 * @param request the link request 1960 * @param operator operator for get: getProp, getMethod, getElem etc 1961 * 1962 * @return GuardedInvocation to be invoked at call site. 1963 */ 1964 protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) { 1965 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 1966 1967 String name; 1968 name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 1969 if (NashornCallSiteDescriptor.isApplyToCall(desc)) { 1970 if (Global.isBuiltinFunctionPrototypeApply()) { 1971 name = "call"; 1972 } 1973 } 1974 1975 if (request.isCallSiteUnstable() || hasWithScope()) { 1976 return findMegaMorphicGetMethod(desc, name, "getMethod".equals(operator)); 1977 } 1978 1979 final FindProperty find = findProperty(name, true); 1980 MethodHandle mh; 1981 1982 if (find == null) { 1983 switch (operator) { 1984 case "getElem": // getElem only gets here if element name is constant, so treat it like a property access 1985 case "getProp": 1986 return noSuchProperty(desc, request); 1987 case "getMethod": 1988 return noSuchMethod(desc, request); 1989 default: 1990 throw new AssertionError(operator); // never invoked with any other operation 1991 } 1992 } 1993 1994 final GlobalConstants globalConstants = getGlobalConstants(); 1995 if (globalConstants != null) { 1996 final GuardedInvocation cinv = globalConstants.findGetMethod(find, this, desc); 1997 if (cinv != null) { 1998 return cinv; 1999 } 2000 } 2001 2002 final Class<?> returnType = desc.getMethodType().returnType(); 2003 final Property property = find.getProperty(); 2004 2005 final int programPoint = NashornCallSiteDescriptor.isOptimistic(desc) ? 2006 NashornCallSiteDescriptor.getProgramPoint(desc) : 2007 UnwarrantedOptimismException.INVALID_PROGRAM_POINT; 2008 2009 mh = find.getGetter(returnType, programPoint, request); 2010 // Get the appropriate guard for this callsite and property. 2011 final MethodHandle guard = NashornGuards.getGuard(this, property, desc, explicitInstanceOfCheck); 2012 final ScriptObject owner = find.getOwner(); 2013 final Class<ClassCastException> exception = explicitInstanceOfCheck ? null : ClassCastException.class; 2014 2015 final SwitchPoint protoSwitchPoint; 2016 2017 if (mh == null) { 2018 mh = Lookup.emptyGetter(returnType); 2019 protoSwitchPoint = getProtoSwitchPoint(name, owner); 2020 } else if (!find.isSelf()) { 2021 assert mh.type().returnType().equals(returnType) : 2022 "return type mismatch for getter " + mh.type().returnType() + " != " + returnType; 2023 if (!(property instanceof UserAccessorProperty)) { 2024 // Add a filter that replaces the self object with the prototype owning the property. 2025 mh = addProtoFilter(mh, find.getProtoChainLength()); 2026 } 2027 protoSwitchPoint = getProtoSwitchPoint(name, owner); 2028 } else { 2029 protoSwitchPoint = null; 2030 } 2031 2032 final GuardedInvocation inv = new GuardedInvocation(mh, guard, protoSwitchPoint, exception); 2033 return inv.addSwitchPoint(findBuiltinSwitchPoint(name)); 2034 } 2035 2036 private static GuardedInvocation findMegaMorphicGetMethod(final CallSiteDescriptor desc, final String name, final boolean isMethod) { 2037 Context.getContextTrusted().getLogger(ObjectClassGenerator.class).warning("Megamorphic getter: " + desc + " " + name + " " +isMethod); 2038 final MethodHandle invoker = MH.insertArguments(MEGAMORPHIC_GET, 1, name, isMethod, NashornCallSiteDescriptor.isScope(desc)); 2039 final MethodHandle guard = getScriptObjectGuard(desc.getMethodType(), true); 2040 return new GuardedInvocation(invoker, guard); 2041 } 2042 2043 @SuppressWarnings("unused") 2044 private Object megamorphicGet(final String key, final boolean isMethod, final boolean isScope) { 2045 final FindProperty find = findProperty(key, true); 2046 if (find != null) { 2047 return find.getObjectValue(); 2048 } 2049 2050 return isMethod ? getNoSuchMethod(key, isScope, INVALID_PROGRAM_POINT) : invokeNoSuchProperty(key, isScope, INVALID_PROGRAM_POINT); 2051 } 2052 2053 // Marks a property as declared and sets its value. Used as slow path for block-scoped LET and CONST 2054 @SuppressWarnings("unused") 2055 private void declareAndSet(final String key, final Object value) { 2056 final PropertyMap oldMap = getMap(); 2057 final FindProperty find = findProperty(key, false); 2058 assert find != null; 2059 2060 final Property property = find.getProperty(); 2061 assert property != null; 2062 assert property.needsDeclaration(); 2063 2064 final PropertyMap newMap = oldMap.replaceProperty(property, property.removeFlags(Property.NEEDS_DECLARATION)); 2065 setMap(newMap); 2066 set(key, value, 0); 2067 } 2068 2069 /** 2070 * Find the appropriate GETINDEX method for an invoke dynamic call. 2071 * 2072 * @param desc the call site descriptor 2073 * @param request the link request 2074 * 2075 * @return GuardedInvocation to be invoked at call site. 2076 */ 2077 protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2078 final MethodType callType = desc.getMethodType(); 2079 final Class<?> returnType = callType.returnType(); 2080 final Class<?> returnClass = returnType.isPrimitive() ? returnType : Object.class; 2081 final Class<?> keyClass = callType.parameterType(1); 2082 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 2083 2084 final String name; 2085 if (returnClass.isPrimitive()) { 2086 //turn e.g. get with a double into getDouble 2087 final String returnTypeName = returnClass.getName(); 2088 name = "get" + Character.toUpperCase(returnTypeName.charAt(0)) + returnTypeName.substring(1, returnTypeName.length()); 2089 } else { 2090 name = "get"; 2091 } 2092 2093 final MethodHandle mh = findGetIndexMethodHandle(returnClass, name, keyClass, desc); 2094 return new GuardedInvocation(mh, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class); 2095 } 2096 2097 private static MethodHandle getScriptObjectGuard(final MethodType type, final boolean explicitInstanceOfCheck) { 2098 return ScriptObject.class.isAssignableFrom(type.parameterType(0)) ? null : NashornGuards.getScriptObjectGuard(explicitInstanceOfCheck); 2099 } 2100 2101 /** 2102 * Find a handle for a getIndex method 2103 * @param returnType return type for getter 2104 * @param name name 2105 * @param elementType index type for getter 2106 * @param desc call site descriptor 2107 * @return method handle for getter 2108 */ 2109 protected MethodHandle findGetIndexMethodHandle(final Class<?> returnType, final String name, final Class<?> elementType, final CallSiteDescriptor desc) { 2110 if (!returnType.isPrimitive()) { 2111 return findOwnMH_V(getClass(), name, returnType, elementType); 2112 } 2113 2114 return MH.insertArguments( 2115 findOwnMH_V(getClass(), name, returnType, elementType, int.class), 2116 2, 2117 NashornCallSiteDescriptor.isOptimistic(desc) ? 2118 NashornCallSiteDescriptor.getProgramPoint(desc) : 2119 INVALID_PROGRAM_POINT); 2120 } 2121 2122 /** 2123 * Get a switch point for a property with the given {@code name} that will be invalidated when 2124 * the property definition is changed in this object's prototype chain. Returns {@code null} if 2125 * the property is defined in this object itself. 2126 * 2127 * @param name the property name 2128 * @param owner the property owner, null if property is not defined 2129 * @return a SwitchPoint or null 2130 */ 2131 public final SwitchPoint getProtoSwitchPoint(final String name, final ScriptObject owner) { 2132 if (owner == this || getProto() == null) { 2133 return null; 2134 } 2135 2136 for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) { 2137 final ScriptObject parent = obj.getProto(); 2138 parent.getMap().addListener(name, obj.getMap()); 2139 } 2140 2141 return getMap().getSwitchPoint(name); 2142 } 2143 2144 /** 2145 * Find the appropriate SET method for an invoke dynamic call. 2146 * 2147 * @param desc the call site descriptor 2148 * @param request the link request 2149 * 2150 * @return GuardedInvocation to be invoked at call site. 2151 */ 2152 protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2153 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 2154 2155 if (request.isCallSiteUnstable() || hasWithScope()) { 2156 return findMegaMorphicSetMethod(desc, name); 2157 } 2158 2159 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 2160 2161 /* 2162 * If doing property set on a scope object, we should stop proto search on the first 2163 * non-scope object. Without this, for example, when assigning "toString" on global scope, 2164 * we'll end up assigning it on it's proto - which is Object.prototype.toString !! 2165 * 2166 * toString = function() { print("global toString"); } // don't affect Object.prototype.toString 2167 */ 2168 FindProperty find = findProperty(name, true, this); 2169 2170 // If it's not a scope search, then we don't want any inherited properties except those with user defined accessors. 2171 if (find != null && find.isInherited() && !(find.getProperty() instanceof UserAccessorProperty)) { 2172 // We should still check if inherited data property is not writable 2173 if (isExtensible() && !find.getProperty().isWritable()) { 2174 return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true); 2175 } 2176 // Otherwise, forget the found property unless this is a scope callsite and the owner is a scope object as well. 2177 if (!NashornCallSiteDescriptor.isScope(desc) || !find.getOwner().isScope()) { 2178 find = null; 2179 } 2180 } 2181 2182 if (find != null) { 2183 if (!find.getProperty().isWritable() && !NashornCallSiteDescriptor.isDeclaration(desc)) { 2184 if (NashornCallSiteDescriptor.isScope(desc) && find.getProperty().isLexicalBinding()) { 2185 throw typeError("assign.constant", name); // Overwriting ES6 const should throw also in non-strict mode. 2186 } 2187 // Existing, non-writable property 2188 return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true); 2189 } 2190 } else { 2191 if (!isExtensible()) { 2192 return createEmptySetMethod(desc, explicitInstanceOfCheck, "object.non.extensible", false); 2193 } 2194 } 2195 2196 final GuardedInvocation inv = new SetMethodCreator(this, find, desc, request).createGuardedInvocation(findBuiltinSwitchPoint(name)); 2197 2198 final GlobalConstants globalConstants = getGlobalConstants(); 2199 if (globalConstants != null) { 2200 final GuardedInvocation cinv = globalConstants.findSetMethod(find, this, inv, desc, request); 2201 if (cinv != null) { 2202 return cinv; 2203 } 2204 } 2205 2206 return inv; 2207 } 2208 2209 private GlobalConstants getGlobalConstants() { 2210 // Avoid hitting getContext() which might be costly for a non-Global unless needed. 2211 return GlobalConstants.GLOBAL_ONLY && !isGlobal() ? null : getContext().getGlobalConstants(); 2212 } 2213 2214 private GuardedInvocation createEmptySetMethod(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String strictErrorMessage, final boolean canBeFastScope) { 2215 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 2216 if (NashornCallSiteDescriptor.isStrict(desc)) { 2217 throw typeError(strictErrorMessage, name, ScriptRuntime.safeToString(this)); 2218 } 2219 assert canBeFastScope || !NashornCallSiteDescriptor.isFastScope(desc); 2220 return new GuardedInvocation( 2221 Lookup.EMPTY_SETTER, 2222 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), 2223 getProtoSwitchPoint(name, null), 2224 explicitInstanceOfCheck ? null : ClassCastException.class); 2225 } 2226 2227 @SuppressWarnings("unused") 2228 private boolean extensionCheck(final boolean isStrict, final String name) { 2229 if (isExtensible()) { 2230 return true; //go on and do the set. this is our guard 2231 } else if (isStrict) { 2232 //throw an error for attempting to do the set in strict mode 2233 throw typeError("object.non.extensible", name, ScriptRuntime.safeToString(this)); 2234 } else { 2235 //not extensible, non strict - this is a nop 2236 return false; 2237 } 2238 } 2239 2240 private GuardedInvocation findMegaMorphicSetMethod(final CallSiteDescriptor desc, final String name) { 2241 final MethodType type = desc.getMethodType().insertParameterTypes(1, Object.class); 2242 //never bother with ClassCastExceptionGuard for megamorphic callsites 2243 final GuardedInvocation inv = findSetIndexMethod(getClass(), desc, false, type); 2244 return inv.replaceMethods(MH.insertArguments(inv.getInvocation(), 1, name), inv.getGuard()); 2245 } 2246 2247 @SuppressWarnings("unused") 2248 private static Object globalFilter(final Object object) { 2249 ScriptObject sobj = (ScriptObject) object; 2250 while (sobj != null && !(sobj instanceof Global)) { 2251 sobj = sobj.getProto(); 2252 } 2253 return sobj; 2254 } 2255 2256 /** 2257 * Lookup function for the set index method, available for subclasses as well, e.g. {@link NativeArray} 2258 * provides special quick accessor linkage for continuous arrays that are represented as Java arrays 2259 * 2260 * @param desc call site descriptor 2261 * @param request link request 2262 * 2263 * @return GuardedInvocation to be invoked at call site. 2264 */ 2265 protected GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) { // array, index, value 2266 return findSetIndexMethod(getClass(), desc, explicitInstanceOfCheck(desc, request), desc.getMethodType()); 2267 } 2268 2269 /** 2270 * Find the appropriate SETINDEX method for an invoke dynamic call. 2271 * 2272 * @param clazz the receiver class 2273 * @param desc the call site descriptor 2274 * @param explicitInstanceOfCheck add an explicit instanceof check? 2275 * @param callType the method type at the call site 2276 * 2277 * @return GuardedInvocation to be invoked at call site. 2278 */ 2279 private static GuardedInvocation findSetIndexMethod(final Class<? extends ScriptObject> clazz, final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final MethodType callType) { 2280 assert callType.parameterCount() == 3; 2281 final Class<?> keyClass = callType.parameterType(1); 2282 final Class<?> valueClass = callType.parameterType(2); 2283 2284 MethodHandle methodHandle = findOwnMH_V(clazz, "set", void.class, keyClass, valueClass, int.class); 2285 methodHandle = MH.insertArguments(methodHandle, 3, NashornCallSiteDescriptor.getFlags(desc)); 2286 2287 return new GuardedInvocation(methodHandle, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class); 2288 } 2289 2290 /** 2291 * Fall back if a function property is not found. 2292 * @param desc The call site descriptor 2293 * @param request the link request 2294 * @return GuardedInvocation to be invoked at call site. 2295 */ 2296 public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2297 final String name = desc.getNameToken(2); 2298 final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true); 2299 final boolean scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc); 2300 2301 if (find == null) { 2302 return noSuchProperty(desc, request); 2303 } 2304 2305 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request); 2306 2307 final Object value = find.getObjectValue(); 2308 if (!(value instanceof ScriptFunction)) { 2309 return createEmptyGetter(desc, explicitInstanceOfCheck, name); 2310 } 2311 2312 final ScriptFunction func = (ScriptFunction)value; 2313 final Object thiz = scopeCall && func.isStrict() ? UNDEFINED : this; 2314 // TODO: It'd be awesome if we could bind "name" without binding "this". 2315 // Since we're binding this we must use an identity guard here. 2316 return new GuardedInvocation( 2317 MH.dropArguments( 2318 MH.constant( 2319 ScriptFunction.class, 2320 func.createBound(thiz, new Object[] { name })), 2321 0, 2322 Object.class), 2323 NashornGuards.combineGuards( 2324 NashornGuards.getIdentityGuard(this), 2325 NashornGuards.getMapGuard(getMap(), true))); 2326 } 2327 2328 /** 2329 * Fall back if a property is not found. 2330 * @param desc the call site descriptor. 2331 * @param request the link request 2332 * @return GuardedInvocation to be invoked at call site. 2333 */ 2334 public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) { 2335 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND); 2336 final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true); 2337 final boolean scopeAccess = isScope() && NashornCallSiteDescriptor.isScope(desc); 2338 2339 if (find != null) { 2340 final Object value = find.getObjectValue(); 2341 ScriptFunction func = null; 2342 MethodHandle mh = null; 2343 2344 if (value instanceof ScriptFunction) { 2345 func = (ScriptFunction)value; 2346 mh = getCallMethodHandle(func, desc.getMethodType(), name); 2347 } 2348 2349 if (mh != null) { 2350 assert func != null; 2351 if (scopeAccess && func.isStrict()) { 2352 mh = bindTo(mh, UNDEFINED); 2353 } 2354 2355 return new GuardedInvocation( 2356 mh, 2357 find.isSelf()? 2358 getKnownFunctionPropertyGuardSelf( 2359 getMap(), 2360 find.getGetter(Object.class, INVALID_PROGRAM_POINT, request), 2361 func) 2362 : 2363 //TODO this always does a scriptobject check 2364 getKnownFunctionPropertyGuardProto( 2365 getMap(), 2366 find.getGetter(Object.class, INVALID_PROGRAM_POINT, request), 2367 find.getProtoChainLength(), 2368 func), 2369 getProtoSwitchPoint(NO_SUCH_PROPERTY_NAME, find.getOwner()), 2370 //TODO this doesn't need a ClassCastException as guard always checks script object 2371 null); 2372 } 2373 } 2374 2375 if (scopeAccess) { 2376 throw referenceError("not.defined", name); 2377 } 2378 2379 return createEmptyGetter(desc, explicitInstanceOfCheck(desc, request), name); 2380 } 2381 2382 /** 2383 * Invoke fall back if a property is not found. 2384 * @param name Name of property. 2385 * @param isScope is this a scope access? 2386 * @param programPoint program point 2387 * @return Result from call. 2388 */ 2389 protected Object invokeNoSuchProperty(final String name, final boolean isScope, final int programPoint) { 2390 final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true); 2391 2392 Object ret = UNDEFINED; 2393 2394 if (find != null) { 2395 final Object func = find.getObjectValue(); 2396 2397 if (func instanceof ScriptFunction) { 2398 final ScriptFunction sfunc = (ScriptFunction)func; 2399 final Object self = isScope && sfunc.isStrict()? UNDEFINED : this; 2400 ret = ScriptRuntime.apply(sfunc, self, name); 2401 } 2402 } 2403 2404 if (isValid(programPoint)) { 2405 throw new UnwarrantedOptimismException(ret, programPoint); 2406 } 2407 2408 return ret; 2409 } 2410 2411 2412 /** 2413 * Get __noSuchMethod__ as a function bound to this object and {@code name} if it is defined. 2414 * @param name the method name 2415 * @param isScope is this a scope access? 2416 * @return the bound function, or undefined 2417 */ 2418 private Object getNoSuchMethod(final String name, final boolean isScope, final int programPoint) { 2419 final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true); 2420 2421 if (find == null) { 2422 return invokeNoSuchProperty(name, isScope, programPoint); 2423 } 2424 2425 final Object value = find.getObjectValue(); 2426 if (!(value instanceof ScriptFunction)) { 2427 return UNDEFINED; 2428 } 2429 2430 final ScriptFunction func = (ScriptFunction)value; 2431 final Object self = isScope && func.isStrict()? UNDEFINED : this; 2432 return func.createBound(self, new Object[] {name}); 2433 } 2434 2435 private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) { 2436 if (NashornCallSiteDescriptor.isOptimistic(desc)) { 2437 throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT); 2438 } 2439 2440 return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()), 2441 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoint(name, null), 2442 explicitInstanceOfCheck ? null : ClassCastException.class); 2443 } 2444 2445 private abstract static class ScriptObjectIterator <T extends Object> implements Iterator<T> { 2446 protected T[] values; 2447 protected final ScriptObject object; 2448 private int index; 2449 2450 ScriptObjectIterator(final ScriptObject object) { 2451 this.object = object; 2452 } 2453 2454 protected abstract void init(); 2455 2456 @Override 2457 public boolean hasNext() { 2458 if (values == null) { 2459 init(); 2460 } 2461 return index < values.length; 2462 } 2463 2464 @Override 2465 public T next() { 2466 if (values == null) { 2467 init(); 2468 } 2469 return values[index++]; 2470 } 2471 2472 @Override 2473 public void remove() { 2474 throw new UnsupportedOperationException("remove"); 2475 } 2476 } 2477 2478 private static class KeyIterator extends ScriptObjectIterator<String> { 2479 KeyIterator(final ScriptObject object) { 2480 super(object); 2481 } 2482 2483 @Override 2484 protected void init() { 2485 final Set<String> keys = new LinkedHashSet<>(); 2486 final Set<String> nonEnumerable = new HashSet<>(); 2487 for (ScriptObject self = object; self != null; self = self.getProto()) { 2488 keys.addAll(Arrays.asList(self.getOwnKeys(false, nonEnumerable))); 2489 } 2490 this.values = keys.toArray(new String[keys.size()]); 2491 } 2492 } 2493 2494 private static class ValueIterator extends ScriptObjectIterator<Object> { 2495 ValueIterator(final ScriptObject object) { 2496 super(object); 2497 } 2498 2499 @Override 2500 protected void init() { 2501 final ArrayList<Object> valueList = new ArrayList<>(); 2502 final Set<String> nonEnumerable = new HashSet<>(); 2503 for (ScriptObject self = object; self != null; self = self.getProto()) { 2504 for (final String key : self.getOwnKeys(false, nonEnumerable)) { 2505 valueList.add(self.get(key)); 2506 } 2507 } 2508 this.values = valueList.toArray(new Object[valueList.size()]); 2509 } 2510 } 2511 2512 /** 2513 * Add a spill property for the given key. 2514 * @param key Property key. 2515 * @param flags Property flags. 2516 * @return Added property. 2517 */ 2518 private Property addSpillProperty(final String key, final int flags, final Object value, final boolean hasInitialValue) { 2519 final PropertyMap propertyMap = getMap(); 2520 final int fieldSlot = propertyMap.getFreeFieldSlot(); 2521 final int propertyFlags = flags | (useDualFields() ? Property.DUAL_FIELDS : 0); 2522 2523 Property property; 2524 if (fieldSlot > -1) { 2525 property = hasInitialValue ? 2526 new AccessorProperty(key, propertyFlags, fieldSlot, this, value) : 2527 new AccessorProperty(key, propertyFlags, getClass(), fieldSlot); 2528 property = addOwnProperty(property); 2529 } else { 2530 final int spillSlot = propertyMap.getFreeSpillSlot(); 2531 property = hasInitialValue ? 2532 new SpillProperty(key, propertyFlags, spillSlot, this, value) : 2533 new SpillProperty(key, propertyFlags, spillSlot); 2534 property = addOwnProperty(property); 2535 ensureSpillSize(property.getSlot()); 2536 } 2537 return property; 2538 } 2539 2540 /** 2541 * Add a spill entry for the given key. 2542 * @param key Property key. 2543 * @return Setter method handle. 2544 */ 2545 MethodHandle addSpill(final Class<?> type, final String key) { 2546 return addSpillProperty(key, 0, null, false).getSetter(type, getMap()); 2547 } 2548 2549 /** 2550 * Make sure arguments are paired correctly, with respect to more parameters than declared, 2551 * fewer parameters than declared and other things that JavaScript allows. This might involve 2552 * creating collectors. 2553 * 2554 * @param methodHandle method handle for invoke 2555 * @param callType type of the call 2556 * 2557 * @return method handle with adjusted arguments 2558 */ 2559 protected static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType) { 2560 return pairArguments(methodHandle, callType, null); 2561 } 2562 2563 /** 2564 * Make sure arguments are paired correctly, with respect to more parameters than declared, 2565 * fewer parameters than declared and other things that JavaScript allows. This might involve 2566 * creating collectors. 2567 * 2568 * Make sure arguments are paired correctly. 2569 * @param methodHandle MethodHandle to adjust. 2570 * @param callType MethodType of the call site. 2571 * @param callerVarArg true if the caller is vararg, false otherwise, null if it should be inferred from the 2572 * {@code callType}; basically, if the last parameter type of the call site is an array, it'll be considered a 2573 * variable arity call site. These are ordinarily rare; Nashorn code generator creates variable arity call sites 2574 * when the call has more than {@link LinkerCallSite#ARGLIMIT} parameters. 2575 * 2576 * @return method handle with adjusted arguments 2577 */ 2578 public static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType, final Boolean callerVarArg) { 2579 final MethodType methodType = methodHandle.type(); 2580 if (methodType.equals(callType.changeReturnType(methodType.returnType()))) { 2581 return methodHandle; 2582 } 2583 2584 final int parameterCount = methodType.parameterCount(); 2585 final int callCount = callType.parameterCount(); 2586 2587 final boolean isCalleeVarArg = parameterCount > 0 && methodType.parameterType(parameterCount - 1).isArray(); 2588 final boolean isCallerVarArg = callerVarArg != null ? callerVarArg : callCount > 0 && 2589 callType.parameterType(callCount - 1).isArray(); 2590 2591 if (isCalleeVarArg) { 2592 return isCallerVarArg ? 2593 methodHandle : 2594 MH.asCollector(methodHandle, Object[].class, callCount - parameterCount + 1); 2595 } 2596 2597 if (isCallerVarArg) { 2598 return adaptHandleToVarArgCallSite(methodHandle, callCount); 2599 } 2600 2601 if (callCount < parameterCount) { 2602 final int missingArgs = parameterCount - callCount; 2603 final Object[] fillers = new Object[missingArgs]; 2604 2605 Arrays.fill(fillers, UNDEFINED); 2606 2607 if (isCalleeVarArg) { 2608 fillers[missingArgs - 1] = ScriptRuntime.EMPTY_ARRAY; 2609 } 2610 2611 return MH.insertArguments( 2612 methodHandle, 2613 parameterCount - missingArgs, 2614 fillers); 2615 } 2616 2617 if (callCount > parameterCount) { 2618 final int discardedArgs = callCount - parameterCount; 2619 2620 final Class<?>[] discards = new Class<?>[discardedArgs]; 2621 Arrays.fill(discards, Object.class); 2622 2623 return MH.dropArguments(methodHandle, callCount - discardedArgs, discards); 2624 } 2625 2626 return methodHandle; 2627 } 2628 2629 static MethodHandle adaptHandleToVarArgCallSite(final MethodHandle mh, final int callSiteParamCount) { 2630 final int spreadArgs = mh.type().parameterCount() - callSiteParamCount + 1; 2631 return MH.filterArguments( 2632 MH.asSpreader( 2633 mh, 2634 Object[].class, 2635 spreadArgs), 2636 callSiteParamCount - 1, 2637 MH.insertArguments( 2638 TRUNCATINGFILTER, 2639 0, 2640 spreadArgs) 2641 ); 2642 } 2643 2644 @SuppressWarnings("unused") 2645 private static Object[] truncatingFilter(final int n, final Object[] array) { 2646 final int length = array == null ? 0 : array.length; 2647 if (n == length) { 2648 return array == null ? ScriptRuntime.EMPTY_ARRAY : array; 2649 } 2650 2651 final Object[] newArray = new Object[n]; 2652 2653 if (array != null) { 2654 System.arraycopy(array, 0, newArray, 0, Math.min(n, length)); 2655 } 2656 2657 if (length < n) { 2658 final Object fill = UNDEFINED; 2659 2660 for (int i = length; i < n; i++) { 2661 newArray[i] = fill; 2662 } 2663 } 2664 2665 return newArray; 2666 } 2667 2668 /** 2669 * Numeric length setter for length property 2670 * 2671 * @param newLength new length to set 2672 */ 2673 public final void setLength(final long newLength) { 2674 ArrayData data = getArray(); 2675 final long arrayLength = data.length(); 2676 if (newLength == arrayLength) { 2677 return; 2678 } 2679 2680 if (newLength > arrayLength) { 2681 data = data.ensure(newLength - 1); 2682 if (data.canDelete(arrayLength, newLength - 1, false)) { 2683 data = data.delete(arrayLength, newLength - 1); 2684 } 2685 setArray(data); 2686 return; 2687 } 2688 2689 if (newLength < arrayLength) { 2690 long actualLength = newLength; 2691 2692 // Check for numeric keys in property map and delete them or adjust length, depending on whether 2693 // they're defined as configurable. See ES5 #15.4.5.2 2694 if (getMap().containsArrayKeys()) { 2695 2696 for (long l = arrayLength - 1; l >= newLength; l--) { 2697 final FindProperty find = findProperty(JSType.toString(l), false); 2698 2699 if (find != null) { 2700 2701 if (find.getProperty().isConfigurable()) { 2702 deleteOwnProperty(find.getProperty()); 2703 } else { 2704 actualLength = l + 1; 2705 break; 2706 } 2707 } 2708 } 2709 } 2710 2711 setArray(data.shrink(actualLength)); 2712 data.setLength(actualLength); 2713 } 2714 } 2715 2716 private int getInt(final int index, final String key, final int programPoint) { 2717 if (isValidArrayIndex(index)) { 2718 for (ScriptObject object = this; ; ) { 2719 if (object.getMap().containsArrayKeys()) { 2720 final FindProperty find = object.findProperty(key, false, this); 2721 2722 if (find != null) { 2723 return getIntValue(find, programPoint); 2724 } 2725 } 2726 2727 if ((object = object.getProto()) == null) { 2728 break; 2729 } 2730 2731 final ArrayData array = object.getArray(); 2732 2733 if (array.has(index)) { 2734 return isValid(programPoint) ? 2735 array.getIntOptimistic(index, programPoint) : 2736 array.getInt(index); 2737 } 2738 } 2739 } else { 2740 final FindProperty find = findProperty(key, true); 2741 2742 if (find != null) { 2743 return getIntValue(find, programPoint); 2744 } 2745 } 2746 2747 return JSType.toInt32(invokeNoSuchProperty(key, false, programPoint)); 2748 } 2749 2750 @Override 2751 public int getInt(final Object key, final int programPoint) { 2752 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2753 final int index = getArrayIndex(primitiveKey); 2754 final ArrayData array = getArray(); 2755 2756 if (array.has(index)) { 2757 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index); 2758 } 2759 2760 return getInt(index, JSType.toString(primitiveKey), programPoint); 2761 } 2762 2763 @Override 2764 public int getInt(final double key, final int programPoint) { 2765 final int index = getArrayIndex(key); 2766 final ArrayData array = getArray(); 2767 2768 if (array.has(index)) { 2769 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index); 2770 } 2771 2772 return getInt(index, JSType.toString(key), programPoint); 2773 } 2774 2775 @Override 2776 public int getInt(final long key, final int programPoint) { 2777 final int index = getArrayIndex(key); 2778 final ArrayData array = getArray(); 2779 2780 if (array.has(index)) { 2781 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index); 2782 } 2783 2784 return getInt(index, JSType.toString(key), programPoint); 2785 } 2786 2787 @Override 2788 public int getInt(final int key, final int programPoint) { 2789 final int index = getArrayIndex(key); 2790 final ArrayData array = getArray(); 2791 2792 if (array.has(index)) { 2793 return isValid(programPoint) ? array.getIntOptimistic(key, programPoint) : array.getInt(key); 2794 } 2795 2796 return getInt(index, JSType.toString(key), programPoint); 2797 } 2798 2799 private long getLong(final int index, final String key, final int programPoint) { 2800 if (isValidArrayIndex(index)) { 2801 for (ScriptObject object = this; ; ) { 2802 if (object.getMap().containsArrayKeys()) { 2803 final FindProperty find = object.findProperty(key, false, this); 2804 if (find != null) { 2805 return getLongValue(find, programPoint); 2806 } 2807 } 2808 2809 if ((object = object.getProto()) == null) { 2810 break; 2811 } 2812 2813 final ArrayData array = object.getArray(); 2814 2815 if (array.has(index)) { 2816 return isValid(programPoint) ? 2817 array.getLongOptimistic(index, programPoint) : 2818 array.getLong(index); 2819 } 2820 } 2821 } else { 2822 final FindProperty find = findProperty(key, true); 2823 2824 if (find != null) { 2825 return getLongValue(find, programPoint); 2826 } 2827 } 2828 2829 return JSType.toLong(invokeNoSuchProperty(key, false, programPoint)); 2830 } 2831 2832 @Override 2833 public long getLong(final Object key, final int programPoint) { 2834 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2835 final int index = getArrayIndex(primitiveKey); 2836 final ArrayData array = getArray(); 2837 2838 if (array.has(index)) { 2839 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index); 2840 } 2841 2842 return getLong(index, JSType.toString(primitiveKey), programPoint); 2843 } 2844 2845 @Override 2846 public long getLong(final double key, final int programPoint) { 2847 final int index = getArrayIndex(key); 2848 final ArrayData array = getArray(); 2849 2850 if (array.has(index)) { 2851 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index); 2852 } 2853 2854 return getLong(index, JSType.toString(key), programPoint); 2855 } 2856 2857 @Override 2858 public long getLong(final long key, final int programPoint) { 2859 final int index = getArrayIndex(key); 2860 final ArrayData array = getArray(); 2861 2862 if (array.has(index)) { 2863 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index); 2864 } 2865 2866 return getLong(index, JSType.toString(key), programPoint); 2867 } 2868 2869 @Override 2870 public long getLong(final int key, final int programPoint) { 2871 final int index = getArrayIndex(key); 2872 final ArrayData array = getArray(); 2873 2874 if (array.has(index)) { 2875 return isValid(programPoint) ? array.getLongOptimistic(key, programPoint) : array.getLong(key); 2876 } 2877 2878 return getLong(index, JSType.toString(key), programPoint); 2879 } 2880 2881 private double getDouble(final int index, final String key, final int programPoint) { 2882 if (isValidArrayIndex(index)) { 2883 for (ScriptObject object = this; ; ) { 2884 if (object.getMap().containsArrayKeys()) { 2885 final FindProperty find = object.findProperty(key, false, this); 2886 if (find != null) { 2887 return getDoubleValue(find, programPoint); 2888 } 2889 } 2890 2891 if ((object = object.getProto()) == null) { 2892 break; 2893 } 2894 2895 final ArrayData array = object.getArray(); 2896 2897 if (array.has(index)) { 2898 return isValid(programPoint) ? 2899 array.getDoubleOptimistic(index, programPoint) : 2900 array.getDouble(index); 2901 } 2902 } 2903 } else { 2904 final FindProperty find = findProperty(key, true); 2905 2906 if (find != null) { 2907 return getDoubleValue(find, programPoint); 2908 } 2909 } 2910 2911 return JSType.toNumber(invokeNoSuchProperty(key, false, INVALID_PROGRAM_POINT)); 2912 } 2913 2914 @Override 2915 public double getDouble(final Object key, final int programPoint) { 2916 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2917 final int index = getArrayIndex(primitiveKey); 2918 final ArrayData array = getArray(); 2919 2920 if (array.has(index)) { 2921 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index); 2922 } 2923 2924 return getDouble(index, JSType.toString(primitiveKey), programPoint); 2925 } 2926 2927 @Override 2928 public double getDouble(final double key, final int programPoint) { 2929 final int index = getArrayIndex(key); 2930 final ArrayData array = getArray(); 2931 2932 if (array.has(index)) { 2933 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index); 2934 } 2935 2936 return getDouble(index, JSType.toString(key), programPoint); 2937 } 2938 2939 @Override 2940 public double getDouble(final long key, final int programPoint) { 2941 final int index = getArrayIndex(key); 2942 final ArrayData array = getArray(); 2943 2944 if (array.has(index)) { 2945 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index); 2946 } 2947 2948 return getDouble(index, JSType.toString(key), programPoint); 2949 } 2950 2951 @Override 2952 public double getDouble(final int key, final int programPoint) { 2953 final int index = getArrayIndex(key); 2954 final ArrayData array = getArray(); 2955 2956 if (array.has(index)) { 2957 return isValid(programPoint) ? array.getDoubleOptimistic(key, programPoint) : array.getDouble(key); 2958 } 2959 2960 return getDouble(index, JSType.toString(key), programPoint); 2961 } 2962 2963 private Object get(final int index, final String key) { 2964 if (isValidArrayIndex(index)) { 2965 for (ScriptObject object = this; ; ) { 2966 if (object.getMap().containsArrayKeys()) { 2967 final FindProperty find = object.findProperty(key, false, this); 2968 2969 if (find != null) { 2970 return find.getObjectValue(); 2971 } 2972 } 2973 2974 if ((object = object.getProto()) == null) { 2975 break; 2976 } 2977 2978 final ArrayData array = object.getArray(); 2979 2980 if (array.has(index)) { 2981 return array.getObject(index); 2982 } 2983 } 2984 } else { 2985 final FindProperty find = findProperty(key, true); 2986 2987 if (find != null) { 2988 return find.getObjectValue(); 2989 } 2990 } 2991 2992 return invokeNoSuchProperty(key, false, INVALID_PROGRAM_POINT); 2993 } 2994 2995 @Override 2996 public Object get(final Object key) { 2997 final Object primitiveKey = JSType.toPrimitive(key, String.class); 2998 final int index = getArrayIndex(primitiveKey); 2999 final ArrayData array = getArray(); 3000 3001 if (array.has(index)) { 3002 return array.getObject(index); 3003 } 3004 3005 return get(index, JSType.toString(primitiveKey)); 3006 } 3007 3008 @Override 3009 public Object get(final double key) { 3010 final int index = getArrayIndex(key); 3011 final ArrayData array = getArray(); 3012 3013 if (array.has(index)) { 3014 return array.getObject(index); 3015 } 3016 3017 return get(index, JSType.toString(key)); 3018 } 3019 3020 @Override 3021 public Object get(final long key) { 3022 final int index = getArrayIndex(key); 3023 final ArrayData array = getArray(); 3024 3025 if (array.has(index)) { 3026 return array.getObject(index); 3027 } 3028 3029 return get(index, JSType.toString(key)); 3030 } 3031 3032 @Override 3033 public Object get(final int key) { 3034 final int index = getArrayIndex(key); 3035 final ArrayData array = getArray(); 3036 3037 if (array.has(index)) { 3038 return array.getObject(index); 3039 } 3040 3041 return get(index, JSType.toString(key)); 3042 } 3043 3044 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final int value, final int callSiteFlags) { 3045 if (getMap().containsArrayKeys()) { 3046 final String key = JSType.toString(longIndex); 3047 final FindProperty find = findProperty(key, true); 3048 if (find != null) { 3049 setObject(find, callSiteFlags, key, value); 3050 return true; 3051 } 3052 } 3053 return false; 3054 } 3055 3056 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final long value, final int callSiteFlags) { 3057 if (getMap().containsArrayKeys()) { 3058 final String key = JSType.toString(longIndex); 3059 final FindProperty find = findProperty(key, true); 3060 if (find != null) { 3061 setObject(find, callSiteFlags, key, value); 3062 return true; 3063 } 3064 } 3065 return false; 3066 } 3067 3068 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final double value, final int callSiteFlags) { 3069 if (getMap().containsArrayKeys()) { 3070 final String key = JSType.toString(longIndex); 3071 final FindProperty find = findProperty(key, true); 3072 if (find != null) { 3073 setObject(find, callSiteFlags, key, value); 3074 return true; 3075 } 3076 } 3077 return false; 3078 } 3079 3080 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final Object value, final int callSiteFlags) { 3081 if (getMap().containsArrayKeys()) { 3082 final String key = JSType.toString(longIndex); 3083 final FindProperty find = findProperty(key, true); 3084 if (find != null) { 3085 setObject(find, callSiteFlags, key, value); 3086 return true; 3087 } 3088 } 3089 return false; 3090 } 3091 3092 //value agnostic 3093 private boolean doesNotHaveEnsureLength(final long longIndex, final long oldLength, final int callSiteFlags) { 3094 if (longIndex >= oldLength) { 3095 if (!isExtensible()) { 3096 if (isStrictFlag(callSiteFlags)) { 3097 throw typeError("object.non.extensible", JSType.toString(longIndex), ScriptRuntime.safeToString(this)); 3098 } 3099 return true; 3100 } 3101 setArray(getArray().ensure(longIndex)); 3102 } 3103 return false; 3104 } 3105 3106 private void doesNotHaveEnsureDelete(final long longIndex, final long oldLength, final boolean strict) { 3107 if (longIndex > oldLength) { 3108 ArrayData array = getArray(); 3109 if (array.canDelete(oldLength, longIndex - 1, strict)) { 3110 array = array.delete(oldLength, longIndex - 1); 3111 } 3112 setArray(array); 3113 } 3114 } 3115 3116 private void doesNotHave(final int index, final int value, final int callSiteFlags) { 3117 final long oldLength = getArray().length(); 3118 final long longIndex = ArrayIndex.toLongIndex(index); 3119 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3120 final boolean strict = isStrictFlag(callSiteFlags); 3121 setArray(getArray().set(index, value, strict)); 3122 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3123 } 3124 } 3125 3126 private void doesNotHave(final int index, final long value, final int callSiteFlags) { 3127 final long oldLength = getArray().length(); 3128 final long longIndex = ArrayIndex.toLongIndex(index); 3129 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3130 final boolean strict = isStrictFlag(callSiteFlags); 3131 setArray(getArray().set(index, value, strict)); 3132 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3133 } 3134 } 3135 3136 private void doesNotHave(final int index, final double value, final int callSiteFlags) { 3137 final long oldLength = getArray().length(); 3138 final long longIndex = ArrayIndex.toLongIndex(index); 3139 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3140 final boolean strict = isStrictFlag(callSiteFlags); 3141 setArray(getArray().set(index, value, strict)); 3142 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3143 } 3144 } 3145 3146 private void doesNotHave(final int index, final Object value, final int callSiteFlags) { 3147 final long oldLength = getArray().length(); 3148 final long longIndex = ArrayIndex.toLongIndex(index); 3149 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) { 3150 final boolean strict = isStrictFlag(callSiteFlags); 3151 setArray(getArray().set(index, value, strict)); 3152 doesNotHaveEnsureDelete(longIndex, oldLength, strict); 3153 } 3154 } 3155 3156 /** 3157 * This is the most generic of all Object setters. Most of the others use this in some form. 3158 * TODO: should be further specialized 3159 * 3160 * @param find found property 3161 * @param callSiteFlags callsite flags 3162 * @param key property key 3163 * @param value property value 3164 */ 3165 public final void setObject(final FindProperty find, final int callSiteFlags, final String key, final Object value) { 3166 FindProperty f = find; 3167 3168 invalidateGlobalConstant(key); 3169 3170 if (f != null && f.isInherited() && !(f.getProperty() instanceof UserAccessorProperty)) { 3171 final boolean isScope = isScopeFlag(callSiteFlags); 3172 // If the start object of the find is not this object it means the property was found inside a 3173 // 'with' statement expression (see WithObject.findProperty()). In this case we forward the 'set' 3174 // to the 'with' object. 3175 // Note that although a 'set' operation involving a with statement follows scope rules outside 3176 // the 'with' expression (the 'set' operation is performed on the owning prototype if it exists), 3177 // it follows non-scope rules inside the 'with' expression (set is performed on the top level object). 3178 // This is why we clear the callsite flags and FindProperty in the forward call to the 'with' object. 3179 if (isScope && f.getSelf() != this) { 3180 f.getSelf().setObject(null, 0, key, value); 3181 return; 3182 } 3183 // Setting a property should not modify the property in prototype unless this is a scope callsite 3184 // and the owner is a scope object as well (with the exception of 'with' statement handled above). 3185 if (!isScope || !f.getOwner().isScope()) { 3186 f = null; 3187 } 3188 } 3189 3190 if (f != null) { 3191 if (!f.getProperty().isWritable()) { 3192 if (isScopeFlag(callSiteFlags) && f.getProperty().isLexicalBinding()) { 3193 throw typeError("assign.constant", key); // Overwriting ES6 const should throw also in non-strict mode. 3194 } 3195 if (isStrictFlag(callSiteFlags)) { 3196 throw typeError("property.not.writable", key, ScriptRuntime.safeToString(this)); 3197 } 3198 return; 3199 } 3200 3201 f.setValue(value, isStrictFlag(callSiteFlags)); 3202 3203 } else if (!isExtensible()) { 3204 if (isStrictFlag(callSiteFlags)) { 3205 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this)); 3206 } 3207 } else { 3208 ScriptObject sobj = this; 3209 // undefined scope properties are set in the global object. 3210 if (isScope()) { 3211 while (sobj != null && !(sobj instanceof Global)) { 3212 sobj = sobj.getProto(); 3213 } 3214 assert sobj != null : "no parent global object in scope"; 3215 } 3216 //this will unbox any Number object to its primitive type in case the 3217 //property supports primitive types, so it doesn't matter that it comes 3218 //in as an Object. 3219 sobj.addSpillProperty(key, 0, value, true); 3220 } 3221 } 3222 3223 @Override 3224 public void set(final Object key, final int value, final int callSiteFlags) { 3225 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3226 final int index = getArrayIndex(primitiveKey); 3227 3228 if (isValidArrayIndex(index)) { 3229 final ArrayData data = getArray(); 3230 if (data.has(index)) { 3231 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3232 } else { 3233 doesNotHave(index, value, callSiteFlags); 3234 } 3235 3236 return; 3237 } 3238 3239 final String propName = JSType.toString(primitiveKey); 3240 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3241 } 3242 3243 @Override 3244 public void set(final Object key, final long value, final int callSiteFlags) { 3245 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3246 final int index = getArrayIndex(primitiveKey); 3247 3248 if (isValidArrayIndex(index)) { 3249 final ArrayData data = getArray(); 3250 if (data.has(index)) { 3251 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3252 } else { 3253 doesNotHave(index, value, callSiteFlags); 3254 } 3255 3256 return; 3257 } 3258 3259 final String propName = JSType.toString(primitiveKey); 3260 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3261 } 3262 3263 @Override 3264 public void set(final Object key, final double value, final int callSiteFlags) { 3265 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3266 final int index = getArrayIndex(primitiveKey); 3267 3268 if (isValidArrayIndex(index)) { 3269 final ArrayData data = getArray(); 3270 if (data.has(index)) { 3271 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3272 } else { 3273 doesNotHave(index, value, callSiteFlags); 3274 } 3275 3276 return; 3277 } 3278 3279 final String propName = JSType.toString(primitiveKey); 3280 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3281 } 3282 3283 @Override 3284 public void set(final Object key, final Object value, final int callSiteFlags) { 3285 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3286 final int index = getArrayIndex(primitiveKey); 3287 3288 if (isValidArrayIndex(index)) { 3289 final ArrayData data = getArray(); 3290 if (data.has(index)) { 3291 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3292 } else { 3293 doesNotHave(index, value, callSiteFlags); 3294 } 3295 3296 return; 3297 } 3298 3299 final String propName = JSType.toString(primitiveKey); 3300 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3301 } 3302 3303 @Override 3304 public void set(final double key, final int value, final int callSiteFlags) { 3305 final int index = getArrayIndex(key); 3306 3307 if (isValidArrayIndex(index)) { 3308 final ArrayData data = getArray(); 3309 if (data.has(index)) { 3310 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3311 } else { 3312 doesNotHave(index, value, callSiteFlags); 3313 } 3314 3315 return; 3316 } 3317 3318 final String propName = JSType.toString(key); 3319 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3320 } 3321 3322 @Override 3323 public void set(final double key, final long value, final int callSiteFlags) { 3324 final int index = getArrayIndex(key); 3325 3326 if (isValidArrayIndex(index)) { 3327 final ArrayData data = getArray(); 3328 if (data.has(index)) { 3329 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3330 } else { 3331 doesNotHave(index, value, callSiteFlags); 3332 } 3333 3334 return; 3335 } 3336 3337 final String propName = JSType.toString(key); 3338 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3339 } 3340 3341 @Override 3342 public void set(final double key, final double value, final int callSiteFlags) { 3343 final int index = getArrayIndex(key); 3344 3345 if (isValidArrayIndex(index)) { 3346 final ArrayData data = getArray(); 3347 if (data.has(index)) { 3348 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3349 } else { 3350 doesNotHave(index, value, callSiteFlags); 3351 } 3352 3353 return; 3354 } 3355 3356 final String propName = JSType.toString(key); 3357 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3358 } 3359 3360 @Override 3361 public void set(final double key, final Object value, final int callSiteFlags) { 3362 final int index = getArrayIndex(key); 3363 3364 if (isValidArrayIndex(index)) { 3365 final ArrayData data = getArray(); 3366 if (data.has(index)) { 3367 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3368 } else { 3369 doesNotHave(index, value, callSiteFlags); 3370 } 3371 3372 return; 3373 } 3374 3375 final String propName = JSType.toString(key); 3376 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3377 } 3378 3379 @Override 3380 public void set(final long key, final int value, final int callSiteFlags) { 3381 final int index = getArrayIndex(key); 3382 3383 if (isValidArrayIndex(index)) { 3384 final ArrayData data = getArray(); 3385 if (data.has(index)) { 3386 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3387 } else { 3388 doesNotHave(index, value, callSiteFlags); 3389 } 3390 3391 return; 3392 } 3393 3394 final String propName = JSType.toString(key); 3395 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3396 } 3397 3398 @Override 3399 public void set(final long key, final long value, final int callSiteFlags) { 3400 final int index = getArrayIndex(key); 3401 3402 if (isValidArrayIndex(index)) { 3403 final ArrayData data = getArray(); 3404 if (data.has(index)) { 3405 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3406 } else { 3407 doesNotHave(index, value, callSiteFlags); 3408 } 3409 3410 return; 3411 } 3412 3413 final String propName = JSType.toString(key); 3414 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3415 } 3416 3417 @Override 3418 public void set(final long key, final double value, final int callSiteFlags) { 3419 final int index = getArrayIndex(key); 3420 3421 if (isValidArrayIndex(index)) { 3422 final ArrayData data = getArray(); 3423 if (data.has(index)) { 3424 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3425 } else { 3426 doesNotHave(index, value, callSiteFlags); 3427 } 3428 3429 return; 3430 } 3431 3432 final String propName = JSType.toString(key); 3433 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3434 } 3435 3436 @Override 3437 public void set(final long key, final Object value, final int callSiteFlags) { 3438 final int index = getArrayIndex(key); 3439 3440 if (isValidArrayIndex(index)) { 3441 final ArrayData data = getArray(); 3442 if (data.has(index)) { 3443 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3444 } else { 3445 doesNotHave(index, value, callSiteFlags); 3446 } 3447 3448 return; 3449 } 3450 3451 final String propName = JSType.toString(key); 3452 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3453 } 3454 3455 @Override 3456 public void set(final int key, final int value, final int callSiteFlags) { 3457 final int index = getArrayIndex(key); 3458 if (isValidArrayIndex(index)) { 3459 if (getArray().has(index)) { 3460 final ArrayData data = getArray(); 3461 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3462 } else { 3463 doesNotHave(index, value, callSiteFlags); 3464 } 3465 return; 3466 } 3467 3468 final String propName = JSType.toString(key); 3469 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3470 } 3471 3472 @Override 3473 public void set(final int key, final long value, final int callSiteFlags) { 3474 final int index = getArrayIndex(key); 3475 3476 if (isValidArrayIndex(index)) { 3477 final ArrayData data = getArray(); 3478 if (data.has(index)) { 3479 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3480 } else { 3481 doesNotHave(index, value, callSiteFlags); 3482 } 3483 3484 return; 3485 } 3486 3487 final String propName = JSType.toString(key); 3488 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3489 } 3490 3491 @Override 3492 public void set(final int key, final double value, final int callSiteFlags) { 3493 final int index = getArrayIndex(key); 3494 3495 if (isValidArrayIndex(index)) { 3496 final ArrayData data = getArray(); 3497 if (data.has(index)) { 3498 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3499 } else { 3500 doesNotHave(index, value, callSiteFlags); 3501 } 3502 3503 return; 3504 } 3505 3506 final String propName = JSType.toString(key); 3507 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value)); 3508 } 3509 3510 @Override 3511 public void set(final int key, final Object value, final int callSiteFlags) { 3512 final int index = getArrayIndex(key); 3513 3514 if (isValidArrayIndex(index)) { 3515 final ArrayData data = getArray(); 3516 if (data.has(index)) { 3517 setArray(data.set(index, value, isStrictFlag(callSiteFlags))); 3518 } else { 3519 doesNotHave(index, value, callSiteFlags); 3520 } 3521 3522 return; 3523 } 3524 3525 final String propName = JSType.toString(key); 3526 setObject(findProperty(propName, true), callSiteFlags, propName, value); 3527 } 3528 3529 @Override 3530 public boolean has(final Object key) { 3531 final Object primitiveKey = JSType.toPrimitive(key); 3532 final int index = getArrayIndex(primitiveKey); 3533 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), true); 3534 } 3535 3536 @Override 3537 public boolean has(final double key) { 3538 final int index = getArrayIndex(key); 3539 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true); 3540 } 3541 3542 @Override 3543 public boolean has(final long key) { 3544 final int index = getArrayIndex(key); 3545 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true); 3546 } 3547 3548 @Override 3549 public boolean has(final int key) { 3550 final int index = getArrayIndex(key); 3551 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true); 3552 } 3553 3554 private boolean hasArrayProperty(final int index) { 3555 boolean hasArrayKeys = false; 3556 3557 for (ScriptObject self = this; self != null; self = self.getProto()) { 3558 if (self.getArray().has(index)) { 3559 return true; 3560 } 3561 hasArrayKeys = hasArrayKeys || self.getMap().containsArrayKeys(); 3562 } 3563 3564 return hasArrayKeys && hasProperty(ArrayIndex.toKey(index), true); 3565 } 3566 3567 @Override 3568 public boolean hasOwnProperty(final Object key) { 3569 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3570 final int index = getArrayIndex(primitiveKey); 3571 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), false); 3572 } 3573 3574 @Override 3575 public boolean hasOwnProperty(final int key) { 3576 final int index = getArrayIndex(key); 3577 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false); 3578 } 3579 3580 @Override 3581 public boolean hasOwnProperty(final long key) { 3582 final int index = getArrayIndex(key); 3583 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false); 3584 } 3585 3586 @Override 3587 public boolean hasOwnProperty(final double key) { 3588 final int index = getArrayIndex(key); 3589 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false); 3590 } 3591 3592 private boolean hasOwnArrayProperty(final int index) { 3593 return getArray().has(index) || getMap().containsArrayKeys() && hasProperty(ArrayIndex.toKey(index), false); 3594 } 3595 3596 @Override 3597 public boolean delete(final int key, final boolean strict) { 3598 final int index = getArrayIndex(key); 3599 final ArrayData array = getArray(); 3600 3601 if (array.has(index)) { 3602 if (array.canDelete(index, strict)) { 3603 setArray(array.delete(index)); 3604 return true; 3605 } 3606 return false; 3607 } 3608 return deleteObject(JSType.toObject(key), strict); 3609 } 3610 3611 @Override 3612 public boolean delete(final long key, final boolean strict) { 3613 final int index = getArrayIndex(key); 3614 final ArrayData array = getArray(); 3615 3616 if (array.has(index)) { 3617 if (array.canDelete(index, strict)) { 3618 setArray(array.delete(index)); 3619 return true; 3620 } 3621 return false; 3622 } 3623 3624 return deleteObject(JSType.toObject(key), strict); 3625 } 3626 3627 @Override 3628 public boolean delete(final double key, final boolean strict) { 3629 final int index = getArrayIndex(key); 3630 final ArrayData array = getArray(); 3631 3632 if (array.has(index)) { 3633 if (array.canDelete(index, strict)) { 3634 setArray(array.delete(index)); 3635 return true; 3636 } 3637 return false; 3638 } 3639 3640 return deleteObject(JSType.toObject(key), strict); 3641 } 3642 3643 @Override 3644 public boolean delete(final Object key, final boolean strict) { 3645 final Object primitiveKey = JSType.toPrimitive(key, String.class); 3646 final int index = getArrayIndex(primitiveKey); 3647 final ArrayData array = getArray(); 3648 3649 if (array.has(index)) { 3650 if (array.canDelete(index, strict)) { 3651 setArray(array.delete(index)); 3652 return true; 3653 } 3654 return false; 3655 } 3656 3657 return deleteObject(primitiveKey, strict); 3658 } 3659 3660 private boolean deleteObject(final Object key, final boolean strict) { 3661 final String propName = JSType.toString(key); 3662 final FindProperty find = findProperty(propName, false); 3663 3664 if (find == null) { 3665 return true; 3666 } 3667 3668 if (!find.getProperty().isConfigurable()) { 3669 if (strict) { 3670 throw typeError("cant.delete.property", propName, ScriptRuntime.safeToString(this)); 3671 } 3672 return false; 3673 } 3674 3675 final Property prop = find.getProperty(); 3676 deleteOwnProperty(prop); 3677 3678 return true; 3679 } 3680 3681 /** 3682 * Return a shallow copy of this ScriptObject. 3683 * @return a shallow copy. 3684 */ 3685 public final ScriptObject copy() { 3686 try { 3687 return clone(); 3688 } catch (final CloneNotSupportedException e) { 3689 throw new RuntimeException(e); 3690 } 3691 } 3692 3693 @Override 3694 protected ScriptObject clone() throws CloneNotSupportedException { 3695 final ScriptObject clone = (ScriptObject) super.clone(); 3696 if (objectSpill != null) { 3697 clone.objectSpill = objectSpill.clone(); 3698 if (primitiveSpill != null) { 3699 clone.primitiveSpill = primitiveSpill.clone(); 3700 } 3701 } 3702 clone.arrayData = arrayData.copy(); 3703 return clone; 3704 } 3705 3706 /** 3707 * Make a new UserAccessorProperty property. getter and setter functions are stored in 3708 * this ScriptObject and slot values are used in property object. 3709 * 3710 * @param key the property name 3711 * @param propertyFlags attribute flags of the property 3712 * @param getter getter function for the property 3713 * @param setter setter function for the property 3714 * @return the newly created UserAccessorProperty 3715 */ 3716 protected final UserAccessorProperty newUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) { 3717 final UserAccessorProperty uc = getMap().newUserAccessors(key, propertyFlags); 3718 //property.getSetter(Object.class, getMap()); 3719 uc.setAccessors(this, getMap(), new UserAccessorProperty.Accessors(getter, setter)); 3720 return uc; 3721 } 3722 3723 /** 3724 * Returns {@code true} if properties for this object should use dual field mode, {@code false} otherwise. 3725 * @return {@code true} if dual fields should be used. 3726 */ 3727 protected boolean useDualFields() { 3728 return !StructureLoader.isSingleFieldStructure(getClass().getName()); 3729 } 3730 3731 Object ensureSpillSize(final int slot) { 3732 final int oldLength = objectSpill == null ? 0 : objectSpill.length; 3733 if (slot < oldLength) { 3734 return this; 3735 } 3736 final int newLength = alignUp(slot + 1, SPILL_RATE); 3737 final Object[] newObjectSpill = new Object[newLength]; 3738 final long[] newPrimitiveSpill = useDualFields() ? new long[newLength] : null; 3739 3740 if (objectSpill != null) { 3741 System.arraycopy(objectSpill, 0, newObjectSpill, 0, oldLength); 3742 if (primitiveSpill != null && newPrimitiveSpill != null) { 3743 System.arraycopy(primitiveSpill, 0, newPrimitiveSpill, 0, oldLength); 3744 } 3745 } 3746 3747 this.primitiveSpill = newPrimitiveSpill; 3748 this.objectSpill = newObjectSpill; 3749 3750 return this; 3751 } 3752 3753 private static MethodHandle findOwnMH_V(final Class<? extends ScriptObject> clazz, final String name, final Class<?> rtype, final Class<?>... types) { 3754 // TODO: figure out how can it work for NativeArray$Prototype etc. 3755 return MH.findVirtual(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types)); 3756 } 3757 3758 private static MethodHandle findOwnMH_V(final String name, final Class<?> rtype, final Class<?>... types) { 3759 return findOwnMH_V(ScriptObject.class, name, rtype, types); 3760 } 3761 3762 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) { 3763 return MH.findStatic(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types)); 3764 } 3765 3766 private static MethodHandle getKnownFunctionPropertyGuardSelf(final PropertyMap map, final MethodHandle getter, final ScriptFunction func) { 3767 return MH.insertArguments(KNOWNFUNCPROPGUARDSELF, 1, map, getter, func); 3768 } 3769 3770 @SuppressWarnings("unused") 3771 private static boolean knownFunctionPropertyGuardSelf(final Object self, final PropertyMap map, final MethodHandle getter, final ScriptFunction func) { 3772 if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) { 3773 try { 3774 return getter.invokeExact(self) == func; 3775 } catch (final RuntimeException | Error e) { 3776 throw e; 3777 } catch (final Throwable t) { 3778 throw new RuntimeException(t); 3779 } 3780 } 3781 3782 return false; 3783 } 3784 3785 private static MethodHandle getKnownFunctionPropertyGuardProto(final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) { 3786 return MH.insertArguments(KNOWNFUNCPROPGUARDPROTO, 1, map, getter, depth, func); 3787 } 3788 3789 private static ScriptObject getProto(final ScriptObject self, final int depth) { 3790 ScriptObject proto = self; 3791 for (int d = 0; d < depth; d++) { 3792 proto = proto.getProto(); 3793 if (proto == null) { 3794 return null; 3795 } 3796 } 3797 3798 return proto; 3799 } 3800 3801 @SuppressWarnings("unused") 3802 private static boolean knownFunctionPropertyGuardProto(final Object self, final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) { 3803 if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) { 3804 final ScriptObject proto = getProto((ScriptObject)self, depth); 3805 if (proto == null) { 3806 return false; 3807 } 3808 try { 3809 return getter.invokeExact((Object)proto) == func; 3810 } catch (final RuntimeException | Error e) { 3811 throw e; 3812 } catch (final Throwable t) { 3813 throw new RuntimeException(t); 3814 } 3815 } 3816 3817 return false; 3818 } 3819 3820 /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created */ 3821 private static LongAdder count; 3822 3823 static { 3824 if (Context.DEBUG) { 3825 count = new LongAdder(); 3826 } 3827 } 3828 /** 3829 * Get number of {@code ScriptObject} instances created. If not running in debug 3830 * mode this is always 0 3831 * 3832 * @return number of ScriptObjects created 3833 */ 3834 public static long getCount() { 3835 return count.longValue(); 3836 } 3837 }