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.codegen.ObjectClassGenerator.OBJECT_FIELDS_ONLY;
32 import static jdk.nashorn.internal.lookup.Lookup.MH;
33 import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
34 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
35 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_DOUBLE;
36 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_INT;
37 import static jdk.nashorn.internal.runtime.JSType.UNDEFINED_LONG;
38 import static jdk.nashorn.internal.runtime.PropertyDescriptor.CONFIGURABLE;
39 import static jdk.nashorn.internal.runtime.PropertyDescriptor.ENUMERABLE;
40 import static jdk.nashorn.internal.runtime.PropertyDescriptor.GET;
41 import static jdk.nashorn.internal.runtime.PropertyDescriptor.SET;
42 import static jdk.nashorn.internal.runtime.PropertyDescriptor.VALUE;
43 import static jdk.nashorn.internal.runtime.PropertyDescriptor.WRITABLE;
44 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
45 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
46 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.isValid;
47 import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.getArrayIndex;
48 import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.isValidArrayIndex;
49 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.isScopeFlag;
50 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.isStrictFlag;
51 import static jdk.nashorn.internal.runtime.linker.NashornGuards.explicitInstanceOfCheck;
52
53 import java.lang.invoke.MethodHandle;
54 import java.lang.invoke.MethodHandles;
55 import java.lang.invoke.MethodType;
56 import java.lang.invoke.SwitchPoint;
57 import java.util.AbstractMap;
58 import java.util.ArrayList;
59 import java.util.Arrays;
60 import java.util.Collection;
61 import java.util.Collections;
62 import java.util.HashSet;
63 import java.util.Iterator;
64 import java.util.LinkedHashSet;
65 import java.util.List;
66 import java.util.Map;
67 import java.util.Set;
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 a scope object? */
114 public static final int IS_SCOPE = 1 << 0;
115
116 /** Per ScriptObject flag - is this an array object? */
117 public static final int IS_ARRAY = 1 << 1;
118
119 /** Per ScriptObject flag - is this an arguments object? */
120 public static final int IS_ARGUMENTS = 1 << 2;
121
122 /** Is length property not-writable? */
123 public static final int IS_LENGTH_NOT_WRITABLE = 1 << 3;
124
125 /** Is this a builtin object? */
126 public static final int IS_BUILTIN = 1 << 4;
127
128 /**
129 * Spill growth rate - by how many elements does {@link ScriptObject#primitiveSpill} and
130 * {@link ScriptObject#objectSpill} when full
131 */
132 public static final int SPILL_RATE = 8;
133
134 /** Map to property information and accessor functions. Ordered by insertion. */
135 private PropertyMap map;
136
137 /** objects proto. */
138 private ScriptObject proto;
139
140 /** Object flags. */
141 private int flags;
142
143 /** Area for primitive properties added to object after instantiation, see {@link AccessorProperty} */
144 protected long[] primitiveSpill;
145
146 /** Area for reference properties added to object after instantiation, see {@link AccessorProperty} */
147 protected Object[] objectSpill;
148
149 /**
150 * Number of elements in the spill. This may be less than the spill array lengths, if not all of
151 * the allocated memory is in use
152 */
153 private int spillLength;
154
155 /** Indexed array data. */
156 private ArrayData arrayData;
157
158 /** Method handle to retrieve prototype of this object */
159 public static final MethodHandle GETPROTO = findOwnMH_V("getProto", ScriptObject.class);
160
161 static final MethodHandle MEGAMORPHIC_GET = findOwnMH_V("megamorphicGet", Object.class, String.class, boolean.class);
162 static final MethodHandle GLOBALFILTER = findOwnMH_S("globalFilter", Object.class, Object.class);
163 static final MethodHandle DECLARE_AND_SET = findOwnMH_V("declareAndSet", void.class, String.class, Object.class);
164
165 private static final MethodHandle TRUNCATINGFILTER = findOwnMH_S("truncatingFilter", Object[].class, int.class, Object[].class);
166 private static final MethodHandle KNOWNFUNCPROPGUARDSELF = findOwnMH_S("knownFunctionPropertyGuardSelf", boolean.class, Object.class, PropertyMap.class, MethodHandle.class, ScriptFunction.class);
167 private static final MethodHandle KNOWNFUNCPROPGUARDPROTO = findOwnMH_S("knownFunctionPropertyGuardProto", boolean.class, Object.class, PropertyMap.class, MethodHandle.class, int.class, ScriptFunction.class);
168
169 private static final ArrayList<MethodHandle> PROTO_FILTERS = new ArrayList<>();
170
171 /** Method handle for getting the array data */
172 public static final Call GET_ARRAY = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getArray", ArrayData.class);
173
174 /** Method handle for getting the property map - debugging purposes */
175 public static final Call GET_MAP = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getMap", PropertyMap.class);
176
177 /** Method handle for setting the array data */
178 public static final Call SET_ARRAY = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setArray", void.class, ArrayData.class);
179
180 /** Method handle for getting a function argument at a given index. Used from MapCreator */
181 public static final Call GET_ARGUMENT = virtualCall(MethodHandles.lookup(), ScriptObject.class, "getArgument", Object.class, int.class);
182
183 /** Method handle for setting a function argument at a given index. Used from MapCreator */
184 public static final Call SET_ARGUMENT = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setArgument", void.class, int.class, Object.class);
185
186 /** Method handle for getting the proto of a ScriptObject */
187 public static final Call GET_PROTO = virtualCallNoLookup(ScriptObject.class, "getProto", ScriptObject.class);
188
189 /** Method handle for getting the proto of a ScriptObject */
190 public static final Call GET_PROTO_DEPTH = virtualCallNoLookup(ScriptObject.class, "getProto", ScriptObject.class, int.class);
191
192 /** Method handle for setting the proto of a ScriptObject */
193 public static final Call SET_GLOBAL_OBJECT_PROTO = staticCallNoLookup(ScriptObject.class, "setGlobalObjectProto", void.class, ScriptObject.class);
194
195 /** Method handle for setting the proto of a ScriptObject after checking argument */
196 public static final Call SET_PROTO_FROM_LITERAL = virtualCallNoLookup(ScriptObject.class, "setProtoFromLiteral", void.class, Object.class);
197
198 /** Method handle for setting the user accessors of a ScriptObject */
199 //TODO fastpath this
200 public static final Call SET_USER_ACCESSORS = virtualCall(MethodHandles.lookup(), ScriptObject.class, "setUserAccessors", void.class, String.class, ScriptFunction.class, ScriptFunction.class);
201
202 static final MethodHandle[] SET_SLOW = new MethodHandle[] {
203 findOwnMH_V("set", void.class, Object.class, int.class, int.class),
204 findOwnMH_V("set", void.class, Object.class, long.class, int.class),
205 findOwnMH_V("set", void.class, Object.class, double.class, int.class),
206 findOwnMH_V("set", void.class, Object.class, Object.class, int.class)
207 };
208
209 /** Method handle to reset the map of this ScriptObject */
210 public static final Call SET_MAP = virtualCallNoLookup(ScriptObject.class, "setMap", void.class, PropertyMap.class);
211
212 static final MethodHandle CAS_MAP = findOwnMH_V("compareAndSetMap", boolean.class, PropertyMap.class, PropertyMap.class);
213 static final MethodHandle EXTENSION_CHECK = findOwnMH_V("extensionCheck", boolean.class, boolean.class, String.class);
214 static final MethodHandle ENSURE_SPILL_SIZE = findOwnMH_V("ensureSpillSize", Object.class, int.class);
215
216 /**
217 * Constructor
218 */
219 public ScriptObject() {
220 this(null);
221 }
222
223 /**
224 * Constructor
225 *
226 * @param map {@link PropertyMap} used to create the initial object
227 */
228 public ScriptObject(final PropertyMap map) {
229 if (Context.DEBUG) {
230 ScriptObject.count++;
231 }
232 this.arrayData = ArrayData.EMPTY_ARRAY;
233 this.setMap(map == null ? PropertyMap.newMap() : map);
234 }
235
236 /**
237 * Constructor that directly sets the prototype to {@code proto} and property map to
238 * {@code map} without invalidating the map as calling {@link #setProto(ScriptObject)}
239 * would do. This should only be used for objects that are always constructed with the
240 * same combination of prototype and property map.
241 *
242 * @param proto the prototype object
243 * @param map intial {@link PropertyMap}
244 */
245 protected ScriptObject(final ScriptObject proto, final PropertyMap map) {
246 this(map);
247 this.proto = proto;
248 }
249
250 /**
251 * Constructor used to instantiate spill properties directly. Used from
252 * SpillObjectCreator.
253 *
254 * @param map property maps
255 * @param primitiveSpill primitive spills
256 * @param objectSpill reference spills
257 */
258 public ScriptObject(final PropertyMap map, final long[] primitiveSpill, final Object[] objectSpill) {
259 this(map);
260 this.primitiveSpill = primitiveSpill;
261 this.objectSpill = objectSpill;
262 assert primitiveSpill.length == objectSpill.length : " primitive spill pool size is not the same length as object spill pool size";
263 this.spillLength = spillAllocationLength(primitiveSpill.length);
264 }
265
266 /**
267 * Check whether this is a global object
268 * @return true if global
269 */
270 protected boolean isGlobal() {
271 return false;
272 }
273
274 private static int alignUp(final int size, final int alignment) {
275 return size + alignment - 1 & ~(alignment - 1);
276 }
277
278 /**
279 * Given a number of properties, return the aligned to SPILL_RATE
280 * buffer size required for the smallest spill pool needed to
281 * house them
282 * @param nProperties number of properties
283 * @return property buffer length, a multiple of SPILL_RATE
284 */
285 public static int spillAllocationLength(final int nProperties) {
286 return alignUp(nProperties, SPILL_RATE);
287 }
288
289 /**
290 * Copy all properties from the source object with their receiver bound to the source.
291 * This function was known as mergeMap
292 *
293 * @param source The source object to copy from.
294 */
295 public void addBoundProperties(final ScriptObject source) {
296 addBoundProperties(source, source.getMap().getProperties());
297 }
298
299 /**
300 * Copy all properties from the array with their receiver bound to the source.
301 *
302 * @param source The source object to copy from.
303 * @param properties The array of properties to copy.
304 */
305 public void addBoundProperties(final ScriptObject source, final Property[] properties) {
306 PropertyMap newMap = this.getMap();
307
308 for (final Property property : properties) {
309 newMap = addBoundProperty(newMap, source, property);
310 }
311
312 this.setMap(newMap);
313 }
314
315 /**
316 * Add a bound property from {@code source}, using the interim property map {@code propMap}, and return the
317 * new interim property map.
318 *
319 * @param propMap the property map
320 * @param source the source object
321 * @param property the property to be added
322 * @return the new property map
323 */
324 protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final Property property) {
325 PropertyMap newMap = propMap;
326 final String key = property.getKey();
327 final Property oldProp = newMap.findProperty(key);
328 if (oldProp == null) {
329 if (property instanceof UserAccessorProperty) {
330 // Note: we copy accessor functions to this object which is semantically different from binding.
331 final UserAccessorProperty prop = this.newUserAccessors(key, property.getFlags(), property.getGetterFunction(source), property.getSetterFunction(source));
332 newMap = newMap.addPropertyNoHistory(prop);
333 } else {
334 newMap = newMap.addPropertyBind((AccessorProperty)property, source);
335 }
336 } else {
337 // See ECMA section 10.5 Declaration Binding Instantiation
338 // step 5 processing each function declaration.
339 if (property.isFunctionDeclaration() && !oldProp.isConfigurable()) {
340 if (oldProp instanceof UserAccessorProperty ||
341 !(oldProp.isWritable() && oldProp.isEnumerable())) {
342 throw typeError("cant.redefine.property", key, ScriptRuntime.safeToString(this));
343 }
344 }
345 }
346 return newMap;
347 }
348
349 /**
350 * Copy all properties from the array with their receiver bound to the source.
351 *
352 * @param source The source object to copy from.
353 * @param properties The collection of accessor properties to copy.
354 */
355 public void addBoundProperties(final Object source, final AccessorProperty[] properties) {
356 PropertyMap newMap = this.getMap();
357
358 for (final AccessorProperty property : properties) {
359 final String key = property.getKey();
360
361 if (newMap.findProperty(key) == null) {
362 newMap = newMap.addPropertyBind(property, source);
363 }
364 }
365
366 this.setMap(newMap);
367 }
368
369 /**
370 * Bind the method handle to the specified receiver, while preserving its original type (it will just ignore the
371 * first argument in lieu of the bound argument).
372 * @param methodHandle Method handle to bind to.
373 * @param receiver Object to bind.
374 * @return Bound method handle.
375 */
376 static MethodHandle bindTo(final MethodHandle methodHandle, final Object receiver) {
377 return MH.dropArguments(MH.bindTo(methodHandle, receiver), 0, methodHandle.type().parameterType(0));
378 }
379
380 /**
381 * Return a property iterator.
382 * @return Property iterator.
383 */
384 public Iterator<String> propertyIterator() {
385 return new KeyIterator(this);
386 }
387
388 /**
389 * Return a property value iterator.
390 * @return Property value iterator.
391 */
392 public Iterator<Object> valueIterator() {
393 return new ValueIterator(this);
394 }
395
396 /**
397 * ECMA 8.10.1 IsAccessorDescriptor ( Desc )
398 * @return true if this has a {@link AccessorPropertyDescriptor} with a getter or a setter
399 */
400 public final boolean isAccessorDescriptor() {
401 return has(GET) || has(SET);
402 }
403
404 /**
405 * ECMA 8.10.2 IsDataDescriptor ( Desc )
406 * @return true if this has a {@link DataPropertyDescriptor}, i.e. the object has a property value and is writable
407 */
408 public final boolean isDataDescriptor() {
409 return has(VALUE) || has(WRITABLE);
410 }
411
412 /**
413 * ECMA 8.10.3 IsGenericDescriptor ( Desc )
414 * @return true if this has a descriptor describing an {@link AccessorPropertyDescriptor} or {@link DataPropertyDescriptor}
415 */
416 public final boolean isGenericDescriptor() {
417 return isAccessorDescriptor() || isDataDescriptor();
418 }
419
420 /**
421 * ECMA 8.10.5 ToPropertyDescriptor ( Obj )
422 *
423 * @return property descriptor
424 */
425 public final PropertyDescriptor toPropertyDescriptor() {
426 final Global global = Context.getGlobal();
427
428 final PropertyDescriptor desc;
429 if (isDataDescriptor()) {
430 if (has(SET) || has(GET)) {
431 throw typeError(global, "inconsistent.property.descriptor");
432 }
433
434 desc = global.newDataDescriptor(UNDEFINED, false, false, false);
435 } else if (isAccessorDescriptor()) {
436 if (has(VALUE) || has(WRITABLE)) {
437 throw typeError(global, "inconsistent.property.descriptor");
438 }
439
440 desc = global.newAccessorDescriptor(UNDEFINED, UNDEFINED, false, false);
441 } else {
442 desc = global.newGenericDescriptor(false, false);
443 }
444
445 return desc.fillFrom(this);
446 }
447
448 /**
449 * ECMA 8.10.5 ToPropertyDescriptor ( Obj )
450 *
451 * @param global global scope object
452 * @param obj object to create property descriptor from
453 *
454 * @return property descriptor
455 */
456 public static PropertyDescriptor toPropertyDescriptor(final Global global, final Object obj) {
457 if (obj instanceof ScriptObject) {
458 return ((ScriptObject)obj).toPropertyDescriptor();
459 }
460
461 throw typeError(global, "not.an.object", ScriptRuntime.safeToString(obj));
462 }
463
464 /**
465 * ECMA 8.12.1 [[GetOwnProperty]] (P)
466 *
467 * @param key property key
468 *
469 * @return Returns the Property Descriptor of the named own property of this
470 * object, or undefined if absent.
471 */
472 public Object getOwnPropertyDescriptor(final String key) {
473 final Property property = getMap().findProperty(key);
474
475 final Global global = Context.getGlobal();
476
477 if (property != null) {
478 final ScriptFunction get = property.getGetterFunction(this);
479 final ScriptFunction set = property.getSetterFunction(this);
480
481 final boolean configurable = property.isConfigurable();
482 final boolean enumerable = property.isEnumerable();
483 final boolean writable = property.isWritable();
484
485 if (property instanceof UserAccessorProperty) {
486 return global.newAccessorDescriptor(
487 get != null ?
488 get :
489 UNDEFINED,
490 set != null ?
491 set :
492 UNDEFINED,
493 configurable,
494 enumerable);
495 }
496
497 return global.newDataDescriptor(getWithProperty(property), configurable, enumerable, writable);
498 }
499
500 final int index = getArrayIndex(key);
501 final ArrayData array = getArray();
502
503 if (array.has(index)) {
504 return array.getDescriptor(global, index);
505 }
506
507 return UNDEFINED;
508 }
509
510 /**
511 * ECMA 8.12.2 [[GetProperty]] (P)
512 *
513 * @param key property key
514 *
515 * @return Returns the fully populated Property Descriptor of the named property
516 * of this object, or undefined if absent.
517 */
518 public Object getPropertyDescriptor(final String key) {
519 final Object res = getOwnPropertyDescriptor(key);
520
521 if (res != UNDEFINED) {
522 return res;
523 } else if (getProto() != null) {
524 return getProto().getOwnPropertyDescriptor(key);
525 } else {
526 return UNDEFINED;
527 }
528 }
529
530 /**
531 * Invalidate any existing global constant method handles that may exist for {@code key}.
532 * @param key the property name
533 */
534 protected void invalidateGlobalConstant(final String key) {
535 final GlobalConstants globalConstants = getGlobalConstants();
536 if (globalConstants != null) {
537 globalConstants.delete(key);
538 }
539 }
540
541 /**
542 * ECMA 8.12.9 [[DefineOwnProperty]] (P, Desc, Throw)
543 *
544 * @param key the property key
545 * @param propertyDesc the property descriptor
546 * @param reject is the property extensible - true means new definitions are rejected
547 *
548 * @return true if property was successfully defined
549 */
550 public boolean defineOwnProperty(final String key, final Object propertyDesc, final boolean reject) {
551 final Global global = Context.getGlobal();
552 final PropertyDescriptor desc = toPropertyDescriptor(global, propertyDesc);
553 final Object current = getOwnPropertyDescriptor(key);
554 final String name = JSType.toString(key);
555
556 invalidateGlobalConstant(key);
557
558 if (current == UNDEFINED) {
559 if (isExtensible()) {
560 // add a new own property
561 addOwnProperty(key, desc);
562 return true;
563 }
564 // new property added to non-extensible object
565 if (reject) {
566 throw typeError(global, "object.non.extensible", name, ScriptRuntime.safeToString(this));
567 }
568 return false;
569 }
570
571 // modifying an existing property
572 final PropertyDescriptor currentDesc = (PropertyDescriptor)current;
573 final PropertyDescriptor newDesc = desc;
574
575 if (newDesc.type() == PropertyDescriptor.GENERIC && !newDesc.has(CONFIGURABLE) && !newDesc.has(ENUMERABLE)) {
576 // every descriptor field is absent
577 return true;
578 }
579
580 if (newDesc.hasAndEquals(currentDesc)) {
581 // every descriptor field of the new is same as the current
582 return true;
583 }
584
585 if (!currentDesc.isConfigurable()) {
586 if (newDesc.has(CONFIGURABLE) && newDesc.isConfigurable()) {
587 // not configurable can not be made configurable
588 if (reject) {
589 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
590 }
591 return false;
592 }
593
594 if (newDesc.has(ENUMERABLE) &&
595 currentDesc.isEnumerable() != newDesc.isEnumerable()) {
596 // cannot make non-enumerable as enumerable or vice-versa
597 if (reject) {
598 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
599 }
600 return false;
601 }
602 }
603
604 int propFlags = Property.mergeFlags(currentDesc, newDesc);
605 Property property = getMap().findProperty(key);
606
607 if (currentDesc.type() == PropertyDescriptor.DATA &&
608 (newDesc.type() == PropertyDescriptor.DATA ||
609 newDesc.type() == PropertyDescriptor.GENERIC)) {
610 if (!currentDesc.isConfigurable() && !currentDesc.isWritable()) {
611 if (newDesc.has(WRITABLE) && newDesc.isWritable() ||
612 newDesc.has(VALUE) && !ScriptRuntime.sameValue(currentDesc.getValue(), newDesc.getValue())) {
613 if (reject) {
614 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
615 }
616 return false;
617 }
618 }
619
620 final boolean newValue = newDesc.has(VALUE);
621 final Object value = newValue ? newDesc.getValue() : currentDesc.getValue();
622
623 if (newValue && property != null) {
624 // Temporarily clear flags.
625 property = modifyOwnProperty(property, 0);
626 set(key, value, 0);
627 //this might change the map if we change types of the property
628 //hence we need to read it again. note that we should probably
629 //have the setter return the new property throughout and in
630 //general respect Property return values from modify and add
631 //functions - which we don't seem to do at all here :-(
632 //There is already a bug filed to generify PropertyAccess so we
633 //can have the setter return e.g. a Property
634 property = getMap().findProperty(key);
635 }
636
637 if (property == null) {
638 // promoting an arrayData value to actual property
639 addOwnProperty(key, propFlags, value);
640 checkIntegerKey(key);
641 } else {
642 // Now set the new flags
643 modifyOwnProperty(property, propFlags);
644 }
645 } else if (currentDesc.type() == PropertyDescriptor.ACCESSOR &&
646 (newDesc.type() == PropertyDescriptor.ACCESSOR ||
647 newDesc.type() == PropertyDescriptor.GENERIC)) {
648 if (!currentDesc.isConfigurable()) {
649 if (newDesc.has(PropertyDescriptor.GET) && !ScriptRuntime.sameValue(currentDesc.getGetter(), newDesc.getGetter()) ||
650 newDesc.has(PropertyDescriptor.SET) && !ScriptRuntime.sameValue(currentDesc.getSetter(), newDesc.getSetter())) {
651 if (reject) {
652 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
653 }
654 return false;
655 }
656 }
657 // New set the new features.
658 modifyOwnProperty(property, propFlags,
659 newDesc.has(GET) ? newDesc.getGetter() : currentDesc.getGetter(),
660 newDesc.has(SET) ? newDesc.getSetter() : currentDesc.getSetter());
661 } else {
662 // changing descriptor type
663 if (!currentDesc.isConfigurable()) {
664 // not configurable can not be made configurable
665 if (reject) {
666 throw typeError(global, "cant.redefine.property", name, ScriptRuntime.safeToString(this));
667 }
668 return false;
669 }
670
671 propFlags = 0;
672
673 // Preserve only configurable and enumerable from current desc
674 // if those are not overridden in the new property descriptor.
675 boolean value = newDesc.has(CONFIGURABLE) ? newDesc.isConfigurable() : currentDesc.isConfigurable();
676 if (!value) {
677 propFlags |= Property.NOT_CONFIGURABLE;
678 }
679 value = newDesc.has(ENUMERABLE)? newDesc.isEnumerable() : currentDesc.isEnumerable();
680 if (!value) {
681 propFlags |= Property.NOT_ENUMERABLE;
682 }
683
684 final int type = newDesc.type();
685 if (type == PropertyDescriptor.DATA) {
686 // get writable from the new descriptor
687 value = newDesc.has(WRITABLE) && newDesc.isWritable();
688 if (!value) {
689 propFlags |= Property.NOT_WRITABLE;
690 }
691
692 // delete the old property
693 deleteOwnProperty(property);
694 // add new data property
695 addOwnProperty(key, propFlags, newDesc.getValue());
696 } else if (type == PropertyDescriptor.ACCESSOR) {
697 if (property == null) {
698 addOwnProperty(key, propFlags,
699 newDesc.has(GET) ? newDesc.getGetter() : null,
700 newDesc.has(SET) ? newDesc.getSetter() : null);
701 } else {
702 // Modify old property with the new features.
703 modifyOwnProperty(property, propFlags,
704 newDesc.has(GET) ? newDesc.getGetter() : null,
705 newDesc.has(SET) ? newDesc.getSetter() : null);
706 }
707 }
708 }
709
710 checkIntegerKey(key);
711
712 return true;
713 }
714
715 /**
716 * Almost like defineOwnProperty(int,Object) for arrays this one does
717 * not add 'gap' elements (like the array one does).
718 *
719 * @param index key for property
720 * @param value value to define
721 */
722 public void defineOwnProperty(final int index, final Object value) {
723 assert isValidArrayIndex(index) : "invalid array index";
724 final long longIndex = ArrayIndex.toLongIndex(index);
725 doesNotHaveEnsureDelete(longIndex, getArray().length(), false);
726 setArray(getArray().ensure(longIndex).set(index,value, false));
727 }
728
729 private void checkIntegerKey(final String key) {
730 final int index = getArrayIndex(key);
731
732 if (isValidArrayIndex(index)) {
733 final ArrayData data = getArray();
734
735 if (data.has(index)) {
736 setArray(data.delete(index));
737 }
738 }
739 }
740
741 /**
742 * Add a new property to the object.
743 *
744 * @param key property key
745 * @param propertyDesc property descriptor for property
746 */
747 public final void addOwnProperty(final String key, final PropertyDescriptor propertyDesc) {
748 // Already checked that there is no own property with that key.
749 PropertyDescriptor pdesc = propertyDesc;
750
751 final int propFlags = Property.toFlags(pdesc);
752
753 if (pdesc.type() == PropertyDescriptor.GENERIC) {
754 final Global global = Context.getGlobal();
755 final PropertyDescriptor dDesc = global.newDataDescriptor(UNDEFINED, false, false, false);
756
757 dDesc.fillFrom((ScriptObject)pdesc);
758 pdesc = dDesc;
759 }
760
761 final int type = pdesc.type();
762 if (type == PropertyDescriptor.DATA) {
763 addOwnProperty(key, propFlags, pdesc.getValue());
764 } else if (type == PropertyDescriptor.ACCESSOR) {
765 addOwnProperty(key, propFlags,
766 pdesc.has(GET) ? pdesc.getGetter() : null,
767 pdesc.has(SET) ? pdesc.getSetter() : null);
768 }
769
770 checkIntegerKey(key);
771 }
772
773 /**
774 * Low level property API (not using property descriptors)
775 * <p>
776 * Find a property in the prototype hierarchy. Note: this is final and not
777 * a good idea to override. If you have to, use
778 * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or
779 * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the
780 * overriding way to find array properties
781 *
782 * @see jdk.nashorn.internal.objects.NativeArray
783 *
784 * @param key Property key.
785 * @param deep Whether the search should look up proto chain.
786 *
787 * @return FindPropertyData or null if not found.
788 */
789 public final FindProperty findProperty(final String key, final boolean deep) {
790 return findProperty(key, deep, this);
791 }
792
793 /**
794 * Low level property API (not using property descriptors)
795 * <p>
796 * Find a property in the prototype hierarchy. Note: this is not a good idea
797 * to override except as it was done in {@link WithObject}.
798 * If you have to, use
799 * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or
800 * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the
801 * overriding way to find array properties
802 *
803 * @see jdk.nashorn.internal.objects.NativeArray
804 *
805 * @param key Property key.
806 * @param deep Whether the search should look up proto chain.
807 * @param start the object on which the lookup was originally initiated
808 *
809 * @return FindPropertyData or null if not found.
810 */
811 FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) {
812
813 final PropertyMap selfMap = getMap();
814 final Property property = selfMap.findProperty(key);
815
816 if (property != null) {
817 return new FindProperty(start, this, property);
818 }
819
820 if (deep) {
821 final ScriptObject myProto = getProto();
822 if (myProto != null) {
823 return myProto.findProperty(key, deep, start);
824 }
825 }
826
827 return null;
828 }
829
830 /**
831 * Low level property API. This is similar to {@link #findProperty(String, boolean)} but returns a
832 * {@code boolean} value instead of a {@link FindProperty} object.
833 * @param key Property key.
834 * @param deep Whether the search should look up proto chain.
835 * @return true if the property was found.
836 */
837 boolean hasProperty(final String key, final boolean deep) {
838 if (getMap().findProperty(key) != null) {
839 return true;
840 }
841
842 if (deep) {
843 final ScriptObject myProto = getProto();
844 if (myProto != null) {
845 return myProto.hasProperty(key, deep);
846 }
847 }
848
849 return false;
850 }
851
852 private SwitchPoint findBuiltinSwitchPoint(final String key) {
853 for (ScriptObject myProto = getProto(); myProto != null; myProto = myProto.getProto()) {
854 final Property prop = myProto.getMap().findProperty(key);
855 if (prop != null) {
856 final SwitchPoint sp = prop.getBuiltinSwitchPoint();
857 if (sp != null && !sp.hasBeenInvalidated()) {
858 return sp;
859 }
860 }
861 }
862 return null;
863 }
864
865 /**
866 * Add a new property to the object.
867 * <p>
868 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
869 *
870 * @param key Property key.
871 * @param propertyFlags Property flags.
872 * @param getter Property getter, or null if not defined
873 * @param setter Property setter, or null if not defined
874 *
875 * @return New property.
876 */
877 public final Property addOwnProperty(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
878 return addOwnProperty(newUserAccessors(key, propertyFlags, getter, setter));
879 }
880
881 /**
882 * Add a new property to the object.
883 * <p>
884 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
885 *
886 * @param key Property key.
887 * @param propertyFlags Property flags.
888 * @param value Value of property
889 *
890 * @return New property.
891 */
892 public final Property addOwnProperty(final String key, final int propertyFlags, final Object value) {
893 return addSpillProperty(key, propertyFlags, value, true);
894 }
895
896 /**
897 * Add a new property to the object.
898 * <p>
899 * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
900 *
901 * @param newProperty property to add
902 *
903 * @return New property.
904 */
905 public final Property addOwnProperty(final Property newProperty) {
906 PropertyMap oldMap = getMap();
907 while (true) {
908 final PropertyMap newMap = oldMap.addProperty(newProperty);
909 if (!compareAndSetMap(oldMap, newMap)) {
910 oldMap = getMap();
911 final Property oldProperty = oldMap.findProperty(newProperty.getKey());
912
913 if (oldProperty != null) {
914 return oldProperty;
915 }
916 } else {
917 return newProperty;
918 }
919 }
920 }
921
922 private void erasePropertyValue(final Property property) {
923 // Erase the property field value with undefined. If the property is defined
924 // by user-defined accessors, we don't want to call the setter!!
925 if (!(property instanceof UserAccessorProperty)) {
926 assert property != null;
927 property.setValue(this, this, UNDEFINED, false);
928 }
929 }
930
931 /**
932 * Delete a property from the object.
933 *
934 * @param property Property to delete.
935 *
936 * @return true if deleted.
937 */
938 public final boolean deleteOwnProperty(final Property property) {
939 erasePropertyValue(property);
940 PropertyMap oldMap = getMap();
941
942 while (true) {
943 final PropertyMap newMap = oldMap.deleteProperty(property);
944
945 if (newMap == null) {
946 return false;
947 }
948
949 if (!compareAndSetMap(oldMap, newMap)) {
950 oldMap = getMap();
951 } else {
952 // delete getter and setter function references so that we don't leak
953 if (property instanceof UserAccessorProperty) {
954 ((UserAccessorProperty)property).setAccessors(this, getMap(), null);
955 }
956
957 invalidateGlobalConstant(property.getKey());
958 return true;
959 }
960 }
961
962 }
963
964 /**
965 * Fast initialization functions for ScriptFunctions that are strict, to avoid
966 * creating setters that probably aren't used. Inject directly into the spill pool
967 * the defaults for "arguments" and "caller"
968 *
969 * @param key property key
970 * @param propertyFlags flags
971 * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A
972 * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A
973 */
974 protected final void initUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
975 final int slot = spillLength;
976 ensureSpillSize(spillLength); //arguments=slot0, caller=slot0
977 objectSpill[slot] = new UserAccessorProperty.Accessors(getter, setter);
978 final PropertyMap oldMap = getMap();
979 Property newProperty;
980 PropertyMap newMap;
981 do {
982 newProperty = new UserAccessorProperty(key, propertyFlags, slot);
983 newMap = oldMap.addProperty(newProperty);
984 } while (!compareAndSetMap(oldMap, newMap));
985 }
986
987 /**
988 * Modify a property in the object
989 *
990 * @param oldProperty property to modify
991 * @param propertyFlags new property flags
992 * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A
993 * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A
994 *
995 * @return new property
996 */
997 public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
998 Property newProperty;
999
1000 if (oldProperty instanceof UserAccessorProperty) {
1001 final UserAccessorProperty uc = (UserAccessorProperty)oldProperty;
1002 final int slot = uc.getSlot();
1003
1004 assert uc.getLocalType() == Object.class;
1005 if (slot >= spillLength) {
1006 uc.setAccessors(this, getMap(), new UserAccessorProperty.Accessors(getter, setter));
1007 } else {
1008 final UserAccessorProperty.Accessors gs = uc.getAccessors(this); //this crashes
1009 if (gs == null) {
1010 uc.setAccessors(this, getMap(), new UserAccessorProperty.Accessors(getter, setter));
1011 } else {
1012 //reuse existing getter setter for speed
1013 gs.set(getter, setter);
1014 if (uc.getFlags() == propertyFlags) {
1015 return oldProperty;
1016 }
1017 }
1018 }
1019 newProperty = new UserAccessorProperty(uc.getKey(), propertyFlags, slot);
1020 } else {
1021 // erase old property value and create new user accessor property
1022 erasePropertyValue(oldProperty);
1023 newProperty = newUserAccessors(oldProperty.getKey(), propertyFlags, getter, setter);
1024 }
1025
1026 return modifyOwnProperty(oldProperty, newProperty);
1027 }
1028
1029 /**
1030 * Modify a property in the object
1031 *
1032 * @param oldProperty property to modify
1033 * @param propertyFlags new property flags
1034 *
1035 * @return new property
1036 */
1037 public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags) {
1038 return modifyOwnProperty(oldProperty, oldProperty.setFlags(propertyFlags));
1039 }
1040
1041 /**
1042 * Modify a property in the object, replacing a property with a new one
1043 *
1044 * @param oldProperty property to replace
1045 * @param newProperty property to replace it with
1046 *
1047 * @return new property
1048 */
1049 private Property modifyOwnProperty(final Property oldProperty, final Property newProperty) {
1050 if (oldProperty == newProperty) {
1051 return newProperty; //nop
1052 }
1053
1054 assert newProperty.getKey().equals(oldProperty.getKey()) : "replacing property with different key";
1055
1056 PropertyMap oldMap = getMap();
1057
1058 while (true) {
1059 final PropertyMap newMap = oldMap.replaceProperty(oldProperty, newProperty);
1060
1061 if (!compareAndSetMap(oldMap, newMap)) {
1062 oldMap = getMap();
1063 final Property oldPropertyLookup = oldMap.findProperty(oldProperty.getKey());
1064
1065 if (oldPropertyLookup != null && oldPropertyLookup.equals(newProperty)) {
1066 return oldPropertyLookup;
1067 }
1068 } else {
1069 return newProperty;
1070 }
1071 }
1072 }
1073
1074 /**
1075 * Update getter and setter in an object literal.
1076 *
1077 * @param key Property key.
1078 * @param getter {@link UserAccessorProperty} defined getter, or null if none
1079 * @param setter {@link UserAccessorProperty} defined setter, or null if none
1080 */
1081 public final void setUserAccessors(final String key, final ScriptFunction getter, final ScriptFunction setter) {
1082 final Property oldProperty = getMap().findProperty(key);
1083 if (oldProperty instanceof UserAccessorProperty) {
1084 modifyOwnProperty(oldProperty, oldProperty.getFlags(), getter, setter);
1085 } else {
1086 addOwnProperty(newUserAccessors(key, oldProperty != null ? oldProperty.getFlags() : 0, getter, setter));
1087 }
1088 }
1089
1090 private static int getIntValue(final FindProperty find, final int programPoint) {
1091 final MethodHandle getter = find.getGetter(int.class, programPoint, null);
1092 if (getter != null) {
1093 try {
1094 return (int)getter.invokeExact((Object)find.getGetterReceiver());
1095 } catch (final Error|RuntimeException e) {
1096 throw e;
1097 } catch (final Throwable e) {
1098 throw new RuntimeException(e);
1099 }
1100 }
1101
1102 return UNDEFINED_INT;
1103 }
1104
1105 private static long getLongValue(final FindProperty find, final int programPoint) {
1106 final MethodHandle getter = find.getGetter(long.class, programPoint, null);
1107 if (getter != null) {
1108 try {
1109 return (long)getter.invokeExact((Object)find.getGetterReceiver());
1110 } catch (final Error|RuntimeException e) {
1111 throw e;
1112 } catch (final Throwable e) {
1113 throw new RuntimeException(e);
1114 }
1115 }
1116
1117 return UNDEFINED_LONG;
1118 }
1119
1120 private static double getDoubleValue(final FindProperty find, final int programPoint) {
1121 final MethodHandle getter = find.getGetter(double.class, programPoint, null);
1122 if (getter != null) {
1123 try {
1124 return (double)getter.invokeExact((Object)find.getGetterReceiver());
1125 } catch (final Error|RuntimeException e) {
1126 throw e;
1127 } catch (final Throwable e) {
1128 throw new RuntimeException(e);
1129 }
1130 }
1131
1132 return UNDEFINED_DOUBLE;
1133 }
1134
1135 /**
1136 * Return methodHandle of value function for call.
1137 *
1138 * @param find data from find property.
1139 * @param type method type of function.
1140 * @param bindName null or name to bind to second argument (property not found method.)
1141 *
1142 * @return value of property as a MethodHandle or null.
1143 */
1144 protected MethodHandle getCallMethodHandle(final FindProperty find, final MethodType type, final String bindName) {
1145 return getCallMethodHandle(find.getObjectValue(), type, bindName);
1146 }
1147
1148 /**
1149 * Return methodHandle of value function for call.
1150 *
1151 * @param value value of receiver, it not a {@link ScriptFunction} this will return null.
1152 * @param type method type of function.
1153 * @param bindName null or name to bind to second argument (property not found method.)
1154 *
1155 * @return value of property as a MethodHandle or null.
1156 */
1157 protected static MethodHandle getCallMethodHandle(final Object value, final MethodType type, final String bindName) {
1158 return value instanceof ScriptFunction ? ((ScriptFunction)value).getCallMethodHandle(type, bindName) : null;
1159 }
1160
1161 /**
1162 * Get value using found property.
1163 *
1164 * @param property Found property.
1165 *
1166 * @return Value of property.
1167 */
1168 public final Object getWithProperty(final Property property) {
1169 return new FindProperty(this, this, property).getObjectValue();
1170 }
1171
1172 /**
1173 * Get a property given a key
1174 *
1175 * @param key property key
1176 *
1177 * @return property for key
1178 */
1179 public final Property getProperty(final String key) {
1180 return getMap().findProperty(key);
1181 }
1182
1183 /**
1184 * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.)
1185 * Used for argument access in a vararg function using parameter name.
1186 * Returns the argument at a given key (index)
1187 *
1188 * @param key argument index
1189 *
1190 * @return the argument at the given position, or undefined if not present
1191 */
1192 public Object getArgument(final int key) {
1193 return get(key);
1194 }
1195
1196 /**
1197 * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.)
1198 * Used for argument access in a vararg function using parameter name.
1199 * Returns the argument at a given key (index)
1200 *
1201 * @param key argument index
1202 * @param value the value to write at the given index
1203 */
1204 public void setArgument(final int key, final Object value) {
1205 set(key, value, 0);
1206 }
1207
1208 /**
1209 * Return the current context from the object's map.
1210 * @return Current context.
1211 */
1212 protected Context getContext() {
1213 return Context.fromClass(getClass());
1214 }
1215
1216 /**
1217 * Return the map of an object.
1218 * @return PropertyMap object.
1219 */
1220 public final PropertyMap getMap() {
1221 return map;
1222 }
1223
1224 /**
1225 * Set the initial map.
1226 * @param map Initial map.
1227 */
1228 public final void setMap(final PropertyMap map) {
1229 this.map = map;
1230 }
1231
1232 /**
1233 * Conditionally set the new map if the old map is the same.
1234 * @param oldMap Map prior to manipulation.
1235 * @param newMap Replacement map.
1236 * @return true if the operation succeeded.
1237 */
1238 protected final boolean compareAndSetMap(final PropertyMap oldMap, final PropertyMap newMap) {
1239 if (oldMap == this.map) {
1240 this.map = newMap;
1241 return true;
1242 }
1243 return false;
1244 }
1245
1246 /**
1247 * Return the __proto__ of an object.
1248 * @return __proto__ object.
1249 */
1250 public final ScriptObject getProto() {
1251 return proto;
1252 }
1253
1254 /**
1255 * Get the proto of a specific depth
1256 * @param n depth
1257 * @return proto at given depth
1258 */
1259 public final ScriptObject getProto(final int n) {
1260 assert n > 0;
1261 ScriptObject p = getProto();
1262 for (int i = n; i-- > 0;) {
1263 p = p.getProto();
1264 }
1265 return p;
1266 }
1267
1268 /**
1269 * Set the __proto__ of an object.
1270 * @param newProto new __proto__ to set.
1271 */
1272 public final void setProto(final ScriptObject newProto) {
1273 final ScriptObject oldProto = proto;
1274
1275 if (oldProto != newProto) {
1276 proto = newProto;
1277
1278 // Let current listeners know that the protototype has changed and set our map
1279 final PropertyListeners listeners = getMap().getListeners();
1280 if (listeners != null) {
1281 listeners.protoChanged();
1282 }
1283 // Replace our current allocator map with one that is associated with the new prototype.
1284 setMap(getMap().changeProto(newProto));
1285 }
1286 }
1287
1288 /**
1289 * Set the initial __proto__ of this object. This should be used instead of
1290 * {@link #setProto} if it is known that the current property map will not be
1291 * used on a new object with any other parent property map, so we can pass over
1292 * property map invalidation/evolution.
1293 *
1294 * @param initialProto the initial __proto__ to set.
1295 */
1296 public void setInitialProto(final ScriptObject initialProto) {
1297 this.proto = initialProto;
1298 }
1299
1300 /**
1301 * Invoked from generated bytecode to initialize the prototype of object literals to the global Object prototype.
1302 * @param obj the object literal that needs to have its prototype initialized to the global Object prototype.
1303 */
1304 public static void setGlobalObjectProto(final ScriptObject obj) {
1305 obj.setInitialProto(Global.objectPrototype());
1306 }
1307
1308 /**
1309 * Set the __proto__ of an object with checks.
1310 * This is the built-in operation [[SetPrototypeOf]]
1311 * See ES6 draft spec: 9.1.2 [[SetPrototypeOf]] (V)
1312 *
1313 * @param newProto Prototype to set.
1314 */
1315 public final void setPrototypeOf(final Object newProto) {
1316 if (newProto == null || newProto instanceof ScriptObject) {
1317 if (! isExtensible()) {
1318 // okay to set same proto again - even if non-extensible
1319
1320 if (newProto == getProto()) {
1321 return;
1322 }
1323 throw typeError("__proto__.set.non.extensible", ScriptRuntime.safeToString(this));
1324 }
1325
1326 // check for circularity
1327 ScriptObject p = (ScriptObject)newProto;
1328 while (p != null) {
1329 if (p == this) {
1330 throw typeError("circular.__proto__.set", ScriptRuntime.safeToString(this));
1331 }
1332 p = p.getProto();
1333 }
1334 setProto((ScriptObject)newProto);
1335 } else {
1336 throw typeError("cant.set.proto.to.non.object", ScriptRuntime.safeToString(this), ScriptRuntime.safeToString(newProto));
1337 }
1338 }
1339
1340 /**
1341 * Set the __proto__ of an object from an object literal.
1342 * See ES6 draft spec: B.3.1 __proto__ Property Names in
1343 * Object Initializers. Step 6 handling of "__proto__".
1344 *
1345 * @param newProto Prototype to set.
1346 */
1347 public final void setProtoFromLiteral(final Object newProto) {
1348 if (newProto == null || newProto instanceof ScriptObject) {
1349 setPrototypeOf(newProto);
1350 } else {
1351 // Some non-object, non-null. Then, we need to set
1352 // Object.prototype as the new __proto__
1353 //
1354 // var obj = { __proto__ : 34 };
1355 // print(obj.__proto__ === Object.prototype); // => true
1356 setPrototypeOf(Global.objectPrototype());
1357 }
1358 }
1359
1360 /**
1361 * return an array of own property keys associated with the object.
1362 *
1363 * @param all True if to include non-enumerable keys.
1364 * @return Array of keys.
1365 */
1366 public final String[] getOwnKeys(final boolean all) {
1367 return getOwnKeys(all, null);
1368 }
1369
1370 /**
1371 * return an array of own property keys associated with the object.
1372 *
1373 * @param all True if to include non-enumerable keys.
1374 * @param nonEnumerable set of non-enumerable properties seen already.Used
1375 to filter out shadowed, but enumerable properties from proto children.
1376 * @return Array of keys.
1377 */
1378 protected String[] getOwnKeys(final boolean all, final Set<String> nonEnumerable) {
1379 final List<Object> keys = new ArrayList<>();
1380 final PropertyMap selfMap = this.getMap();
1381
1382 final ArrayData array = getArray();
1383
1384 for (final Iterator<Long> iter = array.indexIterator(); iter.hasNext(); ) {
1385 keys.add(JSType.toString(iter.next().longValue()));
1386 }
1387
1388 for (final Property property : selfMap.getProperties()) {
1389 final boolean enumerable = property.isEnumerable();
1390 final String key = property.getKey();
1391 if (all) {
1392 keys.add(key);
1393 } else if (enumerable) {
1394 // either we don't have non-enumerable filter set or filter set
1395 // does not contain the current property.
1396 if (nonEnumerable == null || !nonEnumerable.contains(key)) {
1397 keys.add(key);
1398 }
1399 } else {
1400 // store this non-enumerable property for later proto walk
1401 if (nonEnumerable != null) {
1402 nonEnumerable.add(key);
1403 }
1404 }
1405 }
1406
1407 return keys.toArray(new String[keys.size()]);
1408 }
1409
1410 /**
1411 * Check if this ScriptObject has array entries. This means that someone has
1412 * set values with numeric keys in the object.
1413 *
1414 * @return true if array entries exists.
1415 */
1416 public boolean hasArrayEntries() {
1417 return getArray().length() > 0 || getMap().containsArrayKeys();
1418 }
1419
1420 /**
1421 * Return the valid JavaScript type name descriptor
1422 *
1423 * @return "Object"
1424 */
1425 public String getClassName() {
1426 return "Object";
1427 }
1428
1429 /**
1430 * {@code length} is a well known property. This is its getter.
1431 * Note that this *may* be optimized by other classes
1432 *
1433 * @return length property value for this ScriptObject
1434 */
1435 public Object getLength() {
1436 return get("length");
1437 }
1438
1439 /**
1440 * Stateless toString for ScriptObjects.
1441 *
1442 * @return string description of this object, e.g. {@code [object Object]}
1443 */
1444 public String safeToString() {
1445 return "[object " + getClassName() + "]";
1446 }
1447
1448 /**
1449 * Return the default value of the object with a given preferred type hint.
1450 * The preferred type hints are String.class for type String, Number.class
1451 * for type Number. <p>
1452 *
1453 * A <code>hint</code> of null means "no hint".
1454 *
1455 * ECMA 8.12.8 [[DefaultValue]](hint)
1456 *
1457 * @param typeHint the preferred type hint
1458 * @return the default value
1459 */
1460 public Object getDefaultValue(final Class<?> typeHint) {
1461 // We delegate to Global, as the implementation uses dynamic call sites to invoke object's "toString" and
1462 // "valueOf" methods, and in order to avoid those call sites from becoming megamorphic when multiple contexts
1463 // are being executed in a long-running program, we move the code and their associated dynamic call sites
1464 // (Global.TO_STRING and Global.VALUE_OF) into per-context code.
1465 return Context.getGlobal().getDefaultValue(this, typeHint);
1466 }
1467
1468 /**
1469 * Checking whether a script object is an instance of another. Used
1470 * in {@link ScriptFunction} for hasInstance implementation, walks
1471 * the proto chain
1472 *
1473 * @param instance instace to check
1474 * @return true if 'instance' is an instance of this object
1475 */
1476 public boolean isInstance(final ScriptObject instance) {
1477 return false;
1478 }
1479
1480 /**
1481 * Flag this ScriptObject as non extensible
1482 *
1483 * @return the object after being made non extensible
1484 */
1485 public ScriptObject preventExtensions() {
1486 PropertyMap oldMap = getMap();
1487 while (!compareAndSetMap(oldMap, getMap().preventExtensions())) {
1488 oldMap = getMap();
1489 }
1490
1491 //invalidate any fast array setters
1492 final ArrayData array = getArray();
1493 assert array != null;
1494 setArray(ArrayData.preventExtension(array));
1495 return this;
1496 }
1497
1498 /**
1499 * Check whether if an Object (not just a ScriptObject) represents JavaScript array
1500 *
1501 * @param obj object to check
1502 *
1503 * @return true if array
1504 */
1505 public static boolean isArray(final Object obj) {
1506 return obj instanceof ScriptObject && ((ScriptObject)obj).isArray();
1507 }
1508
1509 /**
1510 * Check if this ScriptObject is an array
1511 * @return true if array
1512 */
1513 public final boolean isArray() {
1514 return (flags & IS_ARRAY) != 0;
1515 }
1516
1517 /**
1518 * Flag this ScriptObject as being an array
1519 */
1520 public final void setIsArray() {
1521 flags |= IS_ARRAY;
1522 }
1523
1524 /**
1525 * Check if this ScriptObject is an {@code arguments} vector
1526 * @return true if arguments vector
1527 */
1528 public final boolean isArguments() {
1529 return (flags & IS_ARGUMENTS) != 0;
1530 }
1531
1532 /**
1533 * Flag this ScriptObject as being an {@code arguments} vector
1534 */
1535 public final void setIsArguments() {
1536 flags |= IS_ARGUMENTS;
1537 }
1538
1539 /**
1540 * Check if this object has non-writable length property
1541 *
1542 * @return {@code true} if 'length' property is non-writable
1543 */
1544 public boolean isLengthNotWritable() {
1545 return (flags & IS_LENGTH_NOT_WRITABLE) != 0;
1546 }
1547
1548 /**
1549 * Flag this object as having non-writable length property.
1550 */
1551 public void setIsLengthNotWritable() {
1552 flags |= IS_LENGTH_NOT_WRITABLE;
1553 }
1554
1555 /**
1556 * Get the {@link ArrayData}, for this ScriptObject, ensuring it is of a type
1557 * that can handle elementType
1558 * @param elementType elementType
1559 * @return array data
1560 */
1561 public final ArrayData getArray(final Class<?> elementType) {
1562 if (elementType == null) {
1563 return arrayData;
1564 }
1565 final ArrayData newArrayData = arrayData.convert(elementType);
1566 if (newArrayData != arrayData) {
1567 arrayData = newArrayData;
1568 }
1569 return newArrayData;
1570 }
1571
1572 /**
1573 * Get the {@link ArrayData} for this ScriptObject if it is an array
1574 * @return array data
1575 */
1576 public final ArrayData getArray() {
1577 return arrayData;
1578 }
1579
1580 /**
1581 * Set the {@link ArrayData} for this ScriptObject if it is to be an array
1582 * @param arrayData the array data
1583 */
1584 public final void setArray(final ArrayData arrayData) {
1585 this.arrayData = arrayData;
1586 }
1587
1588 /**
1589 * Check if this ScriptObject is extensible
1590 * @return true if extensible
1591 */
1592 public boolean isExtensible() {
1593 return getMap().isExtensible();
1594 }
1595
1596 /**
1597 * ECMAScript 15.2.3.8 - seal implementation
1598 * @return the sealed ScriptObject
1599 */
1600 public ScriptObject seal() {
1601 PropertyMap oldMap = getMap();
1602
1603 while (true) {
1604 final PropertyMap newMap = getMap().seal();
1605
1606 if (!compareAndSetMap(oldMap, newMap)) {
1607 oldMap = getMap();
1608 } else {
1609 setArray(ArrayData.seal(getArray()));
1610 return this;
1611 }
1612 }
1613 }
1614
1615 /**
1616 * Check whether this ScriptObject is sealed
1617 * @return true if sealed
1618 */
1619 public boolean isSealed() {
1620 return getMap().isSealed();
1621 }
1622
1623 /**
1624 * ECMA 15.2.39 - freeze implementation. Freeze this ScriptObject
1625 * @return the frozen ScriptObject
1626 */
1627 public ScriptObject freeze() {
1628 PropertyMap oldMap = getMap();
1629
1630 while (true) {
1631 final PropertyMap newMap = getMap().freeze();
1632
1633 if (!compareAndSetMap(oldMap, newMap)) {
1634 oldMap = getMap();
1635 } else {
1636 setArray(ArrayData.freeze(getArray()));
1637 return this;
1638 }
1639 }
1640 }
1641
1642 /**
1643 * Check whether this ScriptObject is frozen
1644 * @return true if frozen
1645 */
1646 public boolean isFrozen() {
1647 return getMap().isFrozen();
1648 }
1649
1650
1651 /**
1652 * Flag this ScriptObject as scope
1653 */
1654 public final void setIsScope() {
1655 if (Context.DEBUG) {
1656 scopeCount++;
1657 }
1658 flags |= IS_SCOPE;
1659 }
1660
1661 /**
1662 * Check whether this ScriptObject is scope
1663 * @return true if scope
1664 */
1665 public final boolean isScope() {
1666 return (flags & IS_SCOPE) != 0;
1667 }
1668
1669 /**
1670 * Tag this script object as built in
1671 */
1672 public final void setIsBuiltin() {
1673 flags |= IS_BUILTIN;
1674 }
1675
1676 /**
1677 * Check if this script object is built in
1678 * @return true if build in
1679 */
1680 public final boolean isBuiltin() {
1681 return (flags & IS_BUILTIN) != 0;
1682 }
1683
1684 /**
1685 * Clears the properties from a ScriptObject
1686 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1687 *
1688 * @param strict strict mode or not
1689 */
1690 public void clear(final boolean strict) {
1691 final Iterator<String> iter = propertyIterator();
1692 while (iter.hasNext()) {
1693 delete(iter.next(), strict);
1694 }
1695 }
1696
1697 /**
1698 * Checks if a property with a given key is present in a ScriptObject
1699 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1700 *
1701 * @param key the key to check for
1702 * @return true if a property with the given key exists, false otherwise
1703 */
1704 public boolean containsKey(final Object key) {
1705 return has(key);
1706 }
1707
1708 /**
1709 * Checks if a property with a given value is present in a ScriptObject
1710 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1711 *
1712 * @param value value to check for
1713 * @return true if a property with the given value exists, false otherwise
1714 */
1715 public boolean containsValue(final Object value) {
1716 final Iterator<Object> iter = valueIterator();
1717 while (iter.hasNext()) {
1718 if (iter.next().equals(value)) {
1719 return true;
1720 }
1721 }
1722 return false;
1723 }
1724
1725 /**
1726 * Returns the set of {@literal <property, value>} entries that make up this
1727 * ScriptObject's properties
1728 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1729 *
1730 * @return an entry set of all the properties in this object
1731 */
1732 public Set<Map.Entry<Object, Object>> entrySet() {
1733 final Iterator<String> iter = propertyIterator();
1734 final Set<Map.Entry<Object, Object>> entries = new HashSet<>();
1735 while (iter.hasNext()) {
1736 final Object key = iter.next();
1737 entries.add(new AbstractMap.SimpleImmutableEntry<>(key, get(key)));
1738 }
1739 return Collections.unmodifiableSet(entries);
1740 }
1741
1742 /**
1743 * Check whether a ScriptObject contains no properties
1744 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1745 *
1746 * @return true if object has no properties
1747 */
1748 public boolean isEmpty() {
1749 return !propertyIterator().hasNext();
1750 }
1751
1752 /**
1753 * Return the set of keys (property names) for all properties
1754 * in this ScriptObject
1755 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1756 *
1757 * @return keySet of this ScriptObject
1758 */
1759 public Set<Object> keySet() {
1760 final Iterator<String> iter = propertyIterator();
1761 final Set<Object> keySet = new HashSet<>();
1762 while (iter.hasNext()) {
1763 keySet.add(iter.next());
1764 }
1765 return Collections.unmodifiableSet(keySet);
1766 }
1767
1768 /**
1769 * Put a property in the ScriptObject
1770 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1771 *
1772 * @param key property key
1773 * @param value property value
1774 * @param strict strict mode or not
1775 * @return oldValue if property with same key existed already
1776 */
1777 public Object put(final Object key, final Object value, final boolean strict) {
1778 final Object oldValue = get(key);
1779 final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0;
1780 set(key, value, scriptObjectFlags);
1781 return oldValue;
1782 }
1783
1784 /**
1785 * Put several properties in the ScriptObject given a mapping
1786 * of their keys to their values
1787 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1788 *
1789 * @param otherMap a {@literal <key,value>} map of properties to add
1790 * @param strict strict mode or not
1791 */
1792 public void putAll(final Map<?, ?> otherMap, final boolean strict) {
1793 final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0;
1794 for (final Map.Entry<?, ?> entry : otherMap.entrySet()) {
1795 set(entry.getKey(), entry.getValue(), scriptObjectFlags);
1796 }
1797 }
1798
1799 /**
1800 * Remove a property from the ScriptObject.
1801 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1802 *
1803 * @param key the key of the property
1804 * @param strict strict mode or not
1805 * @return the oldValue of the removed property
1806 */
1807 public Object remove(final Object key, final boolean strict) {
1808 final Object oldValue = get(key);
1809 delete(key, strict);
1810 return oldValue;
1811 }
1812
1813 /**
1814 * Return the size of the ScriptObject - i.e. the number of properties
1815 * it contains
1816 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1817 *
1818 * @return number of properties in ScriptObject
1819 */
1820 public int size() {
1821 int n = 0;
1822 for (final Iterator<String> iter = propertyIterator(); iter.hasNext(); iter.next()) {
1823 n++;
1824 }
1825 return n;
1826 }
1827
1828 /**
1829 * Return the values of the properties in the ScriptObject
1830 * (java.util.Map-like method to help ScriptObjectMirror implementation)
1831 *
1832 * @return collection of values for the properties in this ScriptObject
1833 */
1834 public Collection<Object> values() {
1835 final List<Object> values = new ArrayList<>(size());
1836 final Iterator<Object> iter = valueIterator();
1837 while (iter.hasNext()) {
1838 values.add(iter.next());
1839 }
1840 return Collections.unmodifiableList(values);
1841 }
1842
1843 /**
1844 * Lookup method that, given a CallSiteDescriptor, looks up the target
1845 * MethodHandle and creates a GuardedInvocation
1846 * with the appropriate guard(s).
1847 *
1848 * @param desc call site descriptor
1849 * @param request the link request
1850 *
1851 * @return GuardedInvocation for the callsite
1852 */
1853 public GuardedInvocation lookup(final CallSiteDescriptor desc, final LinkRequest request) {
1854 final int c = desc.getNameTokenCount();
1855 // JavaScript is "immune" to all currently defined Dynalink composite operation - getProp is the same as getElem
1856 // is the same as getMethod as JavaScript objects have a single namespace for all three. Therefore, we don't
1857 // care about them, and just link to whatever is the first operation.
1858 final String operator = CallSiteDescriptorFactory.tokenizeOperators(desc).get(0);
1859 // NOTE: we support getElem and setItem as JavaScript doesn't distinguish items from properties. Nashorn itself
1860 // emits "dyn:getProp:identifier" for "<expr>.<identifier>" and "dyn:getElem" for "<expr>[<expr>]", but we are
1861 // more flexible here and dispatch not on operation name (getProp vs. getElem), but rather on whether the
1862 // operation has an associated name or not.
1863 switch (operator) {
1864 case "getProp":
1865 case "getElem":
1866 case "getMethod":
1867 return c > 2 ? findGetMethod(desc, request, operator) : findGetIndexMethod(desc, request);
1868 case "setProp":
1869 case "setElem":
1870 return c > 2 ? findSetMethod(desc, request) : findSetIndexMethod(desc, request);
1871 case "call":
1872 return findCallMethod(desc, request);
1873 case "new":
1874 return findNewMethod(desc, request);
1875 case "callMethod":
1876 return findCallMethodMethod(desc, request);
1877 default:
1878 return null;
1879 }
1880 }
1881
1882 /**
1883 * Find the appropriate New method for an invoke dynamic call.
1884 *
1885 * @param desc The invoke dynamic call site descriptor.
1886 * @param request The link request
1887 *
1888 * @return GuardedInvocation to be invoked at call site.
1889 */
1890 protected GuardedInvocation findNewMethod(final CallSiteDescriptor desc, final LinkRequest request) {
1891 return notAFunction();
1892 }
1893
1894 /**
1895 * Find the appropriate CALL method for an invoke dynamic call.
1896 * This generates "not a function" always
1897 *
1898 * @param desc the call site descriptor.
1899 * @param request the link request
1900 *
1901 * @return GuardedInvocation to be invoed at call site.
1902 */
1903 protected GuardedInvocation findCallMethod(final CallSiteDescriptor desc, final LinkRequest request) {
1904 return notAFunction();
1905 }
1906
1907 private GuardedInvocation notAFunction() {
1908 throw typeError("not.a.function", ScriptRuntime.safeToString(this));
1909 }
1910
1911 /**
1912 * Find an implementation for a "dyn:callMethod" operation. Note that Nashorn internally never uses
1913 * "dyn:callMethod", but instead always emits two call sites in bytecode, one for "dyn:getMethod", and then another
1914 * one for "dyn:call". Explicit support for "dyn:callMethod" is provided for the benefit of potential external
1915 * callers. The implementation itself actually folds a "dyn:getMethod" method handle into a "dyn:call" method handle.
1916 *
1917 * @param desc the call site descriptor.
1918 * @param request the link request
1919 *
1920 * @return GuardedInvocation to be invoked at call site.
1921 */
1922 protected GuardedInvocation findCallMethodMethod(final CallSiteDescriptor desc, final LinkRequest request) {
1923 // R(P0, P1, ...)
1924 final MethodType callType = desc.getMethodType();
1925 // use type Object(P0) for the getter
1926 final CallSiteDescriptor getterType = desc.changeMethodType(MethodType.methodType(Object.class, callType.parameterType(0)));
1927 final GuardedInvocation getter = findGetMethod(getterType, request, "getMethod");
1928
1929 // Object(P0) => Object(P0, P1, ...)
1930 final MethodHandle argDroppingGetter = MH.dropArguments(getter.getInvocation(), 1, callType.parameterList().subList(1, callType.parameterCount()));
1931 // R(Object, P0, P1, ...)
1932 final MethodHandle invoker = Bootstrap.createDynamicInvoker("dyn:call", callType.insertParameterTypes(0, argDroppingGetter.type().returnType()));
1933 // Fold Object(P0, P1, ...) into R(Object, P0, P1, ...) => R(P0, P1, ...)
1934 return getter.replaceMethods(MH.foldArguments(invoker, argDroppingGetter), getter.getGuard());
1935 }
1936
1937 /**
1938 * Test whether this object contains in its prototype chain or is itself a with-object.
1939 * @return true if a with-object was found
1940 */
1941 final boolean hasWithScope() {
1942 if (isScope()) {
1943 for (ScriptObject obj = this; obj != null; obj = obj.getProto()) {
1944 if (obj instanceof WithObject) {
1945 return true;
1946 }
1947 }
1948 }
1949 return false;
1950 }
1951
1952 /**
1953 * Add a filter to the first argument of {@code methodHandle} that calls its {@link #getProto()} method
1954 * {@code depth} times.
1955 * @param methodHandle a method handle
1956 * @param depth distance to target prototype
1957 * @return the filtered method handle
1958 */
1959 static MethodHandle addProtoFilter(final MethodHandle methodHandle, final int depth) {
1960 if (depth == 0) {
1961 return methodHandle;
1962 }
1963 final int listIndex = depth - 1; // We don't need 0-deep walker
1964 MethodHandle filter = listIndex < PROTO_FILTERS.size() ? PROTO_FILTERS.get(listIndex) : null;
1965
1966 if (filter == null) {
1967 filter = addProtoFilter(GETPROTO, depth - 1);
1968 PROTO_FILTERS.add(null);
1969 PROTO_FILTERS.set(listIndex, filter);
1970 }
1971
1972 return MH.filterArguments(methodHandle, 0, filter.asType(filter.type().changeReturnType(methodHandle.type().parameterType(0))));
1973 }
1974
1975 /**
1976 * Find the appropriate GET method for an invoke dynamic call.
1977 *
1978 * @param desc the call site descriptor
1979 * @param request the link request
1980 * @param operator operator for get: getProp, getMethod, getElem etc
1981 *
1982 * @return GuardedInvocation to be invoked at call site.
1983 */
1984 protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
1985 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
1986
1987 String name;
1988 name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
1989 if (NashornCallSiteDescriptor.isApplyToCall(desc)) {
1990 if (Global.isBuiltinFunctionPrototypeApply()) {
1991 name = "call";
1992 }
1993 }
1994
1995 if (request.isCallSiteUnstable() || hasWithScope()) {
1996 return findMegaMorphicGetMethod(desc, name, "getMethod".equals(operator));
1997 }
1998
1999 final FindProperty find = findProperty(name, true);
2000 MethodHandle mh;
2001
2002 if (find == null) {
2003 switch (operator) {
2004 case "getElem": // getElem only gets here if element name is constant, so treat it like a property access
2005 case "getProp":
2006 return noSuchProperty(desc, request);
2007 case "getMethod":
2008 return noSuchMethod(desc, request);
2009 default:
2010 throw new AssertionError(operator); // never invoked with any other operation
2011 }
2012 }
2013
2014 final GlobalConstants globalConstants = getGlobalConstants();
2015 if (globalConstants != null) {
2016 final GuardedInvocation cinv = globalConstants.findGetMethod(find, this, desc);
2017 if (cinv != null) {
2018 return cinv;
2019 }
2020 }
2021
2022 final Class<?> returnType = desc.getMethodType().returnType();
2023 final Property property = find.getProperty();
2024
2025 final int programPoint = NashornCallSiteDescriptor.isOptimistic(desc) ?
2026 NashornCallSiteDescriptor.getProgramPoint(desc) :
2027 UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
2028
2029 mh = find.getGetter(returnType, programPoint, request);
2030 // Get the appropriate guard for this callsite and property.
2031 final MethodHandle guard = NashornGuards.getGuard(this, property, desc, explicitInstanceOfCheck);
2032 final ScriptObject owner = find.getOwner();
2033 final Class<ClassCastException> exception = explicitInstanceOfCheck ? null : ClassCastException.class;
2034
2035 final SwitchPoint protoSwitchPoint;
2036
2037 if (mh == null) {
2038 mh = Lookup.emptyGetter(returnType);
2039 protoSwitchPoint = getProtoSwitchPoint(name, owner);
2040 } else if (!find.isSelf()) {
2041 assert mh.type().returnType().equals(returnType) :
2042 "return type mismatch for getter " + mh.type().returnType() + " != " + returnType;
2043 if (!(property instanceof UserAccessorProperty)) {
2044 // Add a filter that replaces the self object with the prototype owning the property.
2045 mh = addProtoFilter(mh, find.getProtoChainLength());
2046 }
2047 protoSwitchPoint = getProtoSwitchPoint(name, owner);
2048 } else {
2049 protoSwitchPoint = null;
2050 }
2051
2052 assert OBJECT_FIELDS_ONLY || guard != null : "we always need a map guard here";
2053
2054 final GuardedInvocation inv = new GuardedInvocation(mh, guard, protoSwitchPoint, exception);
2055 return inv.addSwitchPoint(findBuiltinSwitchPoint(name));
2056 }
2057
2058 private static GuardedInvocation findMegaMorphicGetMethod(final CallSiteDescriptor desc, final String name, final boolean isMethod) {
2059 Context.getContextTrusted().getLogger(ObjectClassGenerator.class).warning("Megamorphic getter: " + desc + " " + name + " " +isMethod);
2060 final MethodHandle invoker = MH.insertArguments(MEGAMORPHIC_GET, 1, name, isMethod);
2061 final MethodHandle guard = getScriptObjectGuard(desc.getMethodType(), true);
2062 return new GuardedInvocation(invoker, guard);
2063 }
2064
2065 @SuppressWarnings("unused")
2066 private Object megamorphicGet(final String key, final boolean isMethod) {
2067 final FindProperty find = findProperty(key, true);
2068 if (find != null) {
2069 return find.getObjectValue();
2070 }
2071
2072 return isMethod ? getNoSuchMethod(key, INVALID_PROGRAM_POINT) : invokeNoSuchProperty(key, INVALID_PROGRAM_POINT);
2073 }
2074
2075 // Marks a property as declared and sets its value. Used as slow path for block-scoped LET and CONST
2076 @SuppressWarnings("unused")
2077 private void declareAndSet(final String key, final Object value) {
2078 final PropertyMap oldMap = getMap();
2079 final FindProperty find = findProperty(key, false);
2080 assert find != null;
2081
2082 final Property property = find.getProperty();
2083 assert property != null;
2084 assert property.needsDeclaration();
2085
2086 final PropertyMap newMap = oldMap.replaceProperty(property, property.removeFlags(Property.NEEDS_DECLARATION));
2087 setMap(newMap);
2088 set(key, value, 0);
2089 }
2090
2091 /**
2092 * Find the appropriate GETINDEX method for an invoke dynamic call.
2093 *
2094 * @param desc the call site descriptor
2095 * @param request the link request
2096 *
2097 * @return GuardedInvocation to be invoked at call site.
2098 */
2099 protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2100 final MethodType callType = desc.getMethodType();
2101 final Class<?> returnType = callType.returnType();
2102 final Class<?> returnClass = returnType.isPrimitive() ? returnType : Object.class;
2103 final Class<?> keyClass = callType.parameterType(1);
2104 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
2105
2106 final String name;
2107 if (returnClass.isPrimitive()) {
2108 //turn e.g. get with a double into getDouble
2109 final String returnTypeName = returnClass.getName();
2110 name = "get" + Character.toUpperCase(returnTypeName.charAt(0)) + returnTypeName.substring(1, returnTypeName.length());
2111 } else {
2112 name = "get";
2113 }
2114
2115 final MethodHandle mh = findGetIndexMethodHandle(returnClass, name, keyClass, desc);
2116 return new GuardedInvocation(mh, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
2117 }
2118
2119 private static MethodHandle getScriptObjectGuard(final MethodType type, final boolean explicitInstanceOfCheck) {
2120 return ScriptObject.class.isAssignableFrom(type.parameterType(0)) ? null : NashornGuards.getScriptObjectGuard(explicitInstanceOfCheck);
2121 }
2122
2123 /**
2124 * Find a handle for a getIndex method
2125 * @param returnType return type for getter
2126 * @param name name
2127 * @param elementType index type for getter
2128 * @param desc call site descriptor
2129 * @return method handle for getter
2130 */
2131 protected MethodHandle findGetIndexMethodHandle(final Class<?> returnType, final String name, final Class<?> elementType, final CallSiteDescriptor desc) {
2132 if (!returnType.isPrimitive()) {
2133 return findOwnMH_V(getClass(), name, returnType, elementType);
2134 }
2135
2136 return MH.insertArguments(
2137 findOwnMH_V(getClass(), name, returnType, elementType, int.class),
2138 2,
2139 NashornCallSiteDescriptor.isOptimistic(desc) ?
2140 NashornCallSiteDescriptor.getProgramPoint(desc) :
2141 INVALID_PROGRAM_POINT);
2142 }
2143
2144 /**
2145 * Get a switch point for a property with the given {@code name} that will be invalidated when
2146 * the property definition is changed in this object's prototype chain. Returns {@code null} if
2147 * the property is defined in this object itself.
2148 *
2149 * @param name the property name
2150 * @param owner the property owner, null if property is not defined
2151 * @return a SwitchPoint or null
2152 */
2153 public final SwitchPoint getProtoSwitchPoint(final String name, final ScriptObject owner) {
2154 if (owner == this || getProto() == null) {
2155 return null;
2156 }
2157
2158 for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) {
2159 final ScriptObject parent = obj.getProto();
2160 parent.getMap().addListener(name, obj.getMap());
2161 }
2162
2163 return getMap().getSwitchPoint(name);
2164 }
2165
2166 /**
2167 * Find the appropriate SET method for an invoke dynamic call.
2168 *
2169 * @param desc the call site descriptor
2170 * @param request the link request
2171 *
2172 * @return GuardedInvocation to be invoked at call site.
2173 */
2174 protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2175 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2176
2177 if (request.isCallSiteUnstable() || hasWithScope()) {
2178 return findMegaMorphicSetMethod(desc, name);
2179 }
2180
2181 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
2182
2183 /*
2184 * If doing property set on a scope object, we should stop proto search on the first
2185 * non-scope object. Without this, for example, when assigning "toString" on global scope,
2186 * we'll end up assigning it on it's proto - which is Object.prototype.toString !!
2187 *
2188 * toString = function() { print("global toString"); } // don't affect Object.prototype.toString
2189 */
2190 FindProperty find = findProperty(name, true, this);
2191
2192 // If it's not a scope search, then we don't want any inherited properties except those with user defined accessors.
2193 if (find != null && find.isInherited() && !(find.getProperty() instanceof UserAccessorProperty)) {
2194 // We should still check if inherited data property is not writable
2195 if (isExtensible() && !find.getProperty().isWritable()) {
2196 return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true);
2197 }
2198 // Otherwise, forget the found property unless this is a scope callsite and the owner is a scope object as well.
2199 if (!NashornCallSiteDescriptor.isScope(desc) || !find.getOwner().isScope()) {
2200 find = null;
2201 }
2202 }
2203
2204 if (find != null) {
2205 if (!find.getProperty().isWritable() && !NashornCallSiteDescriptor.isDeclaration(desc)) {
2206 if (NashornCallSiteDescriptor.isScope(desc) && find.getProperty().isLexicalBinding()) {
2207 throw typeError("assign.constant", name); // Overwriting ES6 const should throw also in non-strict mode.
2208 }
2209 // Existing, non-writable property
2210 return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true);
2211 }
2212 } else {
2213 if (!isExtensible()) {
2214 return createEmptySetMethod(desc, explicitInstanceOfCheck, "object.non.extensible", false);
2215 }
2216 }
2217
2218 final GuardedInvocation inv = new SetMethodCreator(this, find, desc, request).createGuardedInvocation(findBuiltinSwitchPoint(name));
2219
2220 final GlobalConstants globalConstants = getGlobalConstants();
2221 if (globalConstants != null) {
2222 final GuardedInvocation cinv = globalConstants.findSetMethod(find, this, inv, desc, request);
2223 if (cinv != null) {
2224 return cinv;
2225 }
2226 }
2227
2228 return inv;
2229 }
2230
2231 private GlobalConstants getGlobalConstants() {
2232 // Avoid hitting getContext() which might be costly for a non-Global unless needed.
2233 return GlobalConstants.GLOBAL_ONLY && !isGlobal() ? null : getContext().getGlobalConstants();
2234 }
2235
2236 private GuardedInvocation createEmptySetMethod(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String strictErrorMessage, final boolean canBeFastScope) {
2237 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2238 if (NashornCallSiteDescriptor.isStrict(desc)) {
2239 throw typeError(strictErrorMessage, name, ScriptRuntime.safeToString(this));
2240 }
2241 assert canBeFastScope || !NashornCallSiteDescriptor.isFastScope(desc);
2242 return new GuardedInvocation(
2243 Lookup.EMPTY_SETTER,
2244 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck),
2245 getProtoSwitchPoint(name, null),
2246 explicitInstanceOfCheck ? null : ClassCastException.class);
2247 }
2248
2249 @SuppressWarnings("unused")
2250 private boolean extensionCheck(final boolean isStrict, final String name) {
2251 if (isExtensible()) {
2252 return true; //go on and do the set. this is our guard
2253 } else if (isStrict) {
2254 //throw an error for attempting to do the set in strict mode
2255 throw typeError("object.non.extensible", name, ScriptRuntime.safeToString(this));
2256 } else {
2257 //not extensible, non strict - this is a nop
2258 return false;
2259 }
2260 }
2261
2262 private GuardedInvocation findMegaMorphicSetMethod(final CallSiteDescriptor desc, final String name) {
2263 final MethodType type = desc.getMethodType().insertParameterTypes(1, Object.class);
2264 //never bother with ClassCastExceptionGuard for megamorphic callsites
2265 final GuardedInvocation inv = findSetIndexMethod(getClass(), desc, false, type);
2266 return inv.replaceMethods(MH.insertArguments(inv.getInvocation(), 1, name), inv.getGuard());
2267 }
2268
2269 @SuppressWarnings("unused")
2270 private static Object globalFilter(final Object object) {
2271 ScriptObject sobj = (ScriptObject) object;
2272 while (sobj != null && !(sobj instanceof Global)) {
2273 sobj = sobj.getProto();
2274 }
2275 return sobj;
2276 }
2277
2278 /**
2279 * Lookup function for the set index method, available for subclasses as well, e.g. {@link NativeArray}
2280 * provides special quick accessor linkage for continuous arrays that are represented as Java arrays
2281 *
2282 * @param desc call site descriptor
2283 * @param request link request
2284 *
2285 * @return GuardedInvocation to be invoked at call site.
2286 */
2287 protected GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) { // array, index, value
2288 return findSetIndexMethod(getClass(), desc, explicitInstanceOfCheck(desc, request), desc.getMethodType());
2289 }
2290
2291 /**
2292 * Find the appropriate SETINDEX method for an invoke dynamic call.
2293 *
2294 * @param clazz the receiver class
2295 * @param desc the call site descriptor
2296 * @param explicitInstanceOfCheck add an explicit instanceof check?
2297 * @param callType the method type at the call site
2298 *
2299 * @return GuardedInvocation to be invoked at call site.
2300 */
2301 private static GuardedInvocation findSetIndexMethod(final Class<? extends ScriptObject> clazz, final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final MethodType callType) {
2302 assert callType.parameterCount() == 3;
2303 final Class<?> keyClass = callType.parameterType(1);
2304 final Class<?> valueClass = callType.parameterType(2);
2305
2306 MethodHandle methodHandle = findOwnMH_V(clazz, "set", void.class, keyClass, valueClass, int.class);
2307 methodHandle = MH.insertArguments(methodHandle, 3, NashornCallSiteDescriptor.getFlags(desc));
2308
2309 return new GuardedInvocation(methodHandle, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
2310 }
2311
2312 /**
2313 * Fall back if a function property is not found.
2314 * @param desc The call site descriptor
2315 * @param request the link request
2316 * @return GuardedInvocation to be invoked at call site.
2317 */
2318 public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2319 final String name = desc.getNameToken(2);
2320 final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
2321 final boolean scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);
2322
2323 if (find == null) {
2324 return noSuchProperty(desc, request);
2325 }
2326
2327 final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
2328
2329 final Object value = find.getObjectValue();
2330 if (!(value instanceof ScriptFunction)) {
2331 return createEmptyGetter(desc, explicitInstanceOfCheck, name);
2332 }
2333
2334 final ScriptFunction func = (ScriptFunction)value;
2335 final Object thiz = scopeCall && func.isStrict() ? ScriptRuntime.UNDEFINED : this;
2336 // TODO: It'd be awesome if we could bind "name" without binding "this".
2337 return new GuardedInvocation(
2338 MH.dropArguments(
2339 MH.constant(
2340 ScriptFunction.class,
2341 func.makeBoundFunction(thiz, new Object[] { name })),
2342 0,
2343 Object.class),
2344 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck),
2345 (SwitchPoint)null,
2346 explicitInstanceOfCheck ? null : ClassCastException.class);
2347 }
2348
2349 /**
2350 * Fall back if a property is not found.
2351 * @param desc the call site descriptor.
2352 * @param request the link request
2353 * @return GuardedInvocation to be invoked at call site.
2354 */
2355 public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) {
2356 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2357 final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
2358 final boolean scopeAccess = isScope() && NashornCallSiteDescriptor.isScope(desc);
2359
2360 if (find != null) {
2361 final Object value = find.getObjectValue();
2362 ScriptFunction func = null;
2363 MethodHandle mh = null;
2364
2365 if (value instanceof ScriptFunction) {
2366 func = (ScriptFunction)value;
2367 mh = getCallMethodHandle(func, desc.getMethodType(), name);
2368 }
2369
2370 if (mh != null) {
2371 assert func != null;
2372 if (scopeAccess && func.isStrict()) {
2373 mh = bindTo(mh, UNDEFINED);
2374 }
2375
2376 return new GuardedInvocation(
2377 mh,
2378 find.isSelf()?
2379 getKnownFunctionPropertyGuardSelf(
2380 getMap(),
2381 find.getGetter(Object.class, INVALID_PROGRAM_POINT, request),
2382 func)
2383 :
2384 //TODO this always does a scriptobject check
2385 getKnownFunctionPropertyGuardProto(
2386 getMap(),
2387 find.getGetter(Object.class, INVALID_PROGRAM_POINT, request),
2388 find.getProtoChainLength(),
2389 func),
2390 getProtoSwitchPoint(NO_SUCH_PROPERTY_NAME, find.getOwner()),
2391 //TODO this doesn't need a ClassCastException as guard always checks script object
2392 null);
2393 }
2394 }
2395
2396 if (scopeAccess) {
2397 throw referenceError("not.defined", name);
2398 }
2399
2400 return createEmptyGetter(desc, explicitInstanceOfCheck(desc, request), name);
2401 }
2402
2403 /**
2404 * Invoke fall back if a property is not found.
2405 * @param name Name of property.
2406 * @param programPoint program point
2407 * @return Result from call.
2408 */
2409 protected Object invokeNoSuchProperty(final String name, final int programPoint) {
2410 final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
2411
2412 Object ret = UNDEFINED;
2413
2414 if (find != null) {
2415 final Object func = find.getObjectValue();
2416
2417 if (func instanceof ScriptFunction) {
2418 ret = ScriptRuntime.apply((ScriptFunction)func, this, name);
2419 }
2420 }
2421
2422 if (isValid(programPoint)) {
2423 throw new UnwarrantedOptimismException(ret, programPoint);
2424 }
2425
2426 return ret;
2427 }
2428
2429
2430 /**
2431 * Get __noSuchMethod__ as a function bound to this object and {@code name} if it is defined.
2432 * @param name the method name
2433 * @return the bound function, or undefined
2434 */
2435 private Object getNoSuchMethod(final String name, final int programPoint) {
2436 final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
2437
2438 if (find == null) {
2439 return invokeNoSuchProperty(name, programPoint);
2440 }
2441
2442 final Object value = find.getObjectValue();
2443 if (!(value instanceof ScriptFunction)) {
2444 return UNDEFINED;
2445 }
2446
2447 return ((ScriptFunction)value).makeBoundFunction(this, new Object[] {name});
2448 }
2449
2450 private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
2451 if (NashornCallSiteDescriptor.isOptimistic(desc)) {
2452 throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
2453 }
2454
2455 return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
2456 NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoint(name, null),
2457 explicitInstanceOfCheck ? null : ClassCastException.class);
2458 }
2459
2460 private abstract static class ScriptObjectIterator <T extends Object> implements Iterator<T> {
2461 protected T[] values;
2462 protected final ScriptObject object;
2463 private int index;
2464
2465 ScriptObjectIterator(final ScriptObject object) {
2466 this.object = object;
2467 }
2468
2469 protected abstract void init();
2470
2471 @Override
2472 public boolean hasNext() {
2473 if (values == null) {
2474 init();
2475 }
2476 return index < values.length;
2477 }
2478
2479 @Override
2480 public T next() {
2481 if (values == null) {
2482 init();
2483 }
2484 return values[index++];
2485 }
2486
2487 @Override
2488 public void remove() {
2489 throw new UnsupportedOperationException("remove");
2490 }
2491 }
2492
2493 private static class KeyIterator extends ScriptObjectIterator<String> {
2494 KeyIterator(final ScriptObject object) {
2495 super(object);
2496 }
2497
2498 @Override
2499 protected void init() {
2500 final Set<String> keys = new LinkedHashSet<>();
2501 final Set<String> nonEnumerable = new HashSet<>();
2502 for (ScriptObject self = object; self != null; self = self.getProto()) {
2503 keys.addAll(Arrays.asList(self.getOwnKeys(false, nonEnumerable)));
2504 }
2505 this.values = keys.toArray(new String[keys.size()]);
2506 }
2507 }
2508
2509 private static class ValueIterator extends ScriptObjectIterator<Object> {
2510 ValueIterator(final ScriptObject object) {
2511 super(object);
2512 }
2513
2514 @Override
2515 protected void init() {
2516 final ArrayList<Object> valueList = new ArrayList<>();
2517 final Set<String> nonEnumerable = new HashSet<>();
2518 for (ScriptObject self = object; self != null; self = self.getProto()) {
2519 for (final String key : self.getOwnKeys(false, nonEnumerable)) {
2520 valueList.add(self.get(key));
2521 }
2522 }
2523 this.values = valueList.toArray(new Object[valueList.size()]);
2524 }
2525 }
2526
2527 /**
2528 * Add a spill property for the given key.
2529 * @param key Property key.
2530 * @param propertyFlags Property flags.
2531 * @return Added property.
2532 */
2533 private Property addSpillProperty(final String key, final int propertyFlags, final Object value, final boolean hasInitialValue) {
2534 final PropertyMap propertyMap = getMap();
2535 final int fieldSlot = propertyMap.getFreeFieldSlot();
2536
2537 Property property;
2538 if (fieldSlot > -1) {
2539 property = hasInitialValue ?
2540 new AccessorProperty(key, propertyFlags, fieldSlot, this, value) :
2541 new AccessorProperty(key, propertyFlags, getClass(), fieldSlot);
2542 property = addOwnProperty(property);
2543 } else {
2544 final int spillSlot = propertyMap.getFreeSpillSlot();
2545 property = hasInitialValue ?
2546 new SpillProperty(key, propertyFlags, spillSlot, this, value) :
2547 new SpillProperty(key, propertyFlags, spillSlot);
2548 property = addOwnProperty(property);
2549 ensureSpillSize(property.getSlot());
2550 }
2551 return property;
2552 }
2553
2554 /**
2555 * Add a spill entry for the given key.
2556 * @param key Property key.
2557 * @return Setter method handle.
2558 */
2559 MethodHandle addSpill(final Class<?> type, final String key) {
2560 return addSpillProperty(key, 0, null, false).getSetter(OBJECT_FIELDS_ONLY ? Object.class : type, getMap());
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 * @param methodHandle method handle for invoke
2569 * @param callType type of the call
2570 *
2571 * @return method handle with adjusted arguments
2572 */
2573 protected static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType) {
2574 return pairArguments(methodHandle, callType, null);
2575 }
2576
2577 /**
2578 * Make sure arguments are paired correctly, with respect to more parameters than declared,
2579 * fewer parameters than declared and other things that JavaScript allows. This might involve
2580 * creating collectors.
2581 *
2582 * Make sure arguments are paired correctly.
2583 * @param methodHandle MethodHandle to adjust.
2584 * @param callType MethodType of the call site.
2585 * @param callerVarArg true if the caller is vararg, false otherwise, null if it should be inferred from the
2586 * {@code callType}; basically, if the last parameter type of the call site is an array, it'll be considered a
2587 * variable arity call site. These are ordinarily rare; Nashorn code generator creates variable arity call sites
2588 * when the call has more than {@link LinkerCallSite#ARGLIMIT} parameters.
2589 *
2590 * @return method handle with adjusted arguments
2591 */
2592 public static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType, final Boolean callerVarArg) {
2593 final MethodType methodType = methodHandle.type();
2594 if (methodType.equals(callType.changeReturnType(methodType.returnType()))) {
2595 return methodHandle;
2596 }
2597
2598 final int parameterCount = methodType.parameterCount();
2599 final int callCount = callType.parameterCount();
2600
2601 final boolean isCalleeVarArg = parameterCount > 0 && methodType.parameterType(parameterCount - 1).isArray();
2602 final boolean isCallerVarArg = callerVarArg != null ? callerVarArg.booleanValue() : callCount > 0 &&
2603 callType.parameterType(callCount - 1).isArray();
2604
2605 if (isCalleeVarArg) {
2606 return isCallerVarArg ?
2607 methodHandle :
2608 MH.asCollector(methodHandle, Object[].class, callCount - parameterCount + 1);
2609 }
2610
2611 if (isCallerVarArg) {
2612 return adaptHandleToVarArgCallSite(methodHandle, callCount);
2613 }
2614
2615 if (callCount < parameterCount) {
2616 final int missingArgs = parameterCount - callCount;
2617 final Object[] fillers = new Object[missingArgs];
2618
2619 Arrays.fill(fillers, UNDEFINED);
2620
2621 if (isCalleeVarArg) {
2622 fillers[missingArgs - 1] = ScriptRuntime.EMPTY_ARRAY;
2623 }
2624
2625 return MH.insertArguments(
2626 methodHandle,
2627 parameterCount - missingArgs,
2628 fillers);
2629 }
2630
2631 if (callCount > parameterCount) {
2632 final int discardedArgs = callCount - parameterCount;
2633
2634 final Class<?>[] discards = new Class<?>[discardedArgs];
2635 Arrays.fill(discards, Object.class);
2636
2637 return MH.dropArguments(methodHandle, callCount - discardedArgs, discards);
2638 }
2639
2640 return methodHandle;
2641 }
2642
2643 static MethodHandle adaptHandleToVarArgCallSite(final MethodHandle mh, final int callSiteParamCount) {
2644 final int spreadArgs = mh.type().parameterCount() - callSiteParamCount + 1;
2645 return MH.filterArguments(
2646 MH.asSpreader(
2647 mh,
2648 Object[].class,
2649 spreadArgs),
2650 callSiteParamCount - 1,
2651 MH.insertArguments(
2652 TRUNCATINGFILTER,
2653 0,
2654 spreadArgs)
2655 );
2656 }
2657
2658 @SuppressWarnings("unused")
2659 private static Object[] truncatingFilter(final int n, final Object[] array) {
2660 final int length = array == null ? 0 : array.length;
2661 if (n == length) {
2662 return array == null ? ScriptRuntime.EMPTY_ARRAY : array;
2663 }
2664
2665 final Object[] newArray = new Object[n];
2666
2667 if (array != null) {
2668 System.arraycopy(array, 0, newArray, 0, Math.min(n, length));
2669 }
2670
2671 if (length < n) {
2672 final Object fill = UNDEFINED;
2673
2674 for (int i = length; i < n; i++) {
2675 newArray[i] = fill;
2676 }
2677 }
2678
2679 return newArray;
2680 }
2681
2682 /**
2683 * Numeric length setter for length property
2684 *
2685 * @param newLength new length to set
2686 */
2687 public final void setLength(final long newLength) {
2688 ArrayData data = getArray();
2689 final long arrayLength = data.length();
2690 if (newLength == arrayLength) {
2691 return;
2692 }
2693
2694 if (newLength > arrayLength) {
2695 data = data.ensure(newLength - 1);
2696 if (data.canDelete(arrayLength, newLength - 1, false)) {
2697 data = data.delete(arrayLength, newLength - 1);
2698 }
2699 setArray(data);
2700 return;
2701 }
2702
2703 if (newLength < arrayLength) {
2704 long actualLength = newLength;
2705
2706 // Check for numeric keys in property map and delete them or adjust length, depending on whether
2707 // they're defined as configurable. See ES5 #15.4.5.2
2708 if (getMap().containsArrayKeys()) {
2709
2710 for (long l = arrayLength - 1; l >= newLength; l--) {
2711 final FindProperty find = findProperty(JSType.toString(l), false);
2712
2713 if (find != null) {
2714
2715 if (find.getProperty().isConfigurable()) {
2716 deleteOwnProperty(find.getProperty());
2717 } else {
2718 actualLength = l + 1;
2719 break;
2720 }
2721 }
2722 }
2723 }
2724
2725 setArray(data.shrink(actualLength));
2726 data.setLength(actualLength);
2727 }
2728 }
2729
2730 private int getInt(final int index, final String key, final int programPoint) {
2731 if (isValidArrayIndex(index)) {
2732 for (ScriptObject object = this; ; ) {
2733 if (object.getMap().containsArrayKeys()) {
2734 final FindProperty find = object.findProperty(key, false, this);
2735
2736 if (find != null) {
2737 return getIntValue(find, programPoint);
2738 }
2739 }
2740
2741 if ((object = object.getProto()) == null) {
2742 break;
2743 }
2744
2745 final ArrayData array = object.getArray();
2746
2747 if (array.has(index)) {
2748 return isValid(programPoint) ?
2749 array.getIntOptimistic(index, programPoint) :
2750 array.getInt(index);
2751 }
2752 }
2753 } else {
2754 final FindProperty find = findProperty(key, true);
2755
2756 if (find != null) {
2757 return getIntValue(find, programPoint);
2758 }
2759 }
2760
2761 return JSType.toInt32(invokeNoSuchProperty(key, programPoint));
2762 }
2763
2764 @Override
2765 public int getInt(final Object key, final int programPoint) {
2766 final Object primitiveKey = JSType.toPrimitive(key, String.class);
2767 final int index = getArrayIndex(primitiveKey);
2768 final ArrayData array = getArray();
2769
2770 if (array.has(index)) {
2771 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index);
2772 }
2773
2774 return getInt(index, JSType.toString(primitiveKey), programPoint);
2775 }
2776
2777 @Override
2778 public int getInt(final double key, final int programPoint) {
2779 final int index = getArrayIndex(key);
2780 final ArrayData array = getArray();
2781
2782 if (array.has(index)) {
2783 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index);
2784 }
2785
2786 return getInt(index, JSType.toString(key), programPoint);
2787 }
2788
2789 @Override
2790 public int getInt(final long key, final int programPoint) {
2791 final int index = getArrayIndex(key);
2792 final ArrayData array = getArray();
2793
2794 if (array.has(index)) {
2795 return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index);
2796 }
2797
2798 return getInt(index, JSType.toString(key), programPoint);
2799 }
2800
2801 @Override
2802 public int getInt(final int key, final int programPoint) {
2803 final int index = getArrayIndex(key);
2804 final ArrayData array = getArray();
2805
2806 if (array.has(index)) {
2807 return isValid(programPoint) ? array.getIntOptimistic(key, programPoint) : array.getInt(key);
2808 }
2809
2810 return getInt(index, JSType.toString(key), programPoint);
2811 }
2812
2813 private long getLong(final int index, final String key, final int programPoint) {
2814 if (isValidArrayIndex(index)) {
2815 for (ScriptObject object = this; ; ) {
2816 if (object.getMap().containsArrayKeys()) {
2817 final FindProperty find = object.findProperty(key, false, this);
2818 if (find != null) {
2819 return getLongValue(find, programPoint);
2820 }
2821 }
2822
2823 if ((object = object.getProto()) == null) {
2824 break;
2825 }
2826
2827 final ArrayData array = object.getArray();
2828
2829 if (array.has(index)) {
2830 return isValid(programPoint) ?
2831 array.getLongOptimistic(index, programPoint) :
2832 array.getLong(index);
2833 }
2834 }
2835 } else {
2836 final FindProperty find = findProperty(key, true);
2837
2838 if (find != null) {
2839 return getLongValue(find, programPoint);
2840 }
2841 }
2842
2843 return JSType.toLong(invokeNoSuchProperty(key, programPoint));
2844 }
2845
2846 @Override
2847 public long getLong(final Object key, final int programPoint) {
2848 final Object primitiveKey = JSType.toPrimitive(key, String.class);
2849 final int index = getArrayIndex(primitiveKey);
2850 final ArrayData array = getArray();
2851
2852 if (array.has(index)) {
2853 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index);
2854 }
2855
2856 return getLong(index, JSType.toString(primitiveKey), programPoint);
2857 }
2858
2859 @Override
2860 public long getLong(final double key, final int programPoint) {
2861 final int index = getArrayIndex(key);
2862 final ArrayData array = getArray();
2863
2864 if (array.has(index)) {
2865 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index);
2866 }
2867
2868 return getLong(index, JSType.toString(key), programPoint);
2869 }
2870
2871 @Override
2872 public long getLong(final long key, final int programPoint) {
2873 final int index = getArrayIndex(key);
2874 final ArrayData array = getArray();
2875
2876 if (array.has(index)) {
2877 return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index);
2878 }
2879
2880 return getLong(index, JSType.toString(key), programPoint);
2881 }
2882
2883 @Override
2884 public long getLong(final int key, final int programPoint) {
2885 final int index = getArrayIndex(key);
2886 final ArrayData array = getArray();
2887
2888 if (array.has(index)) {
2889 return isValid(programPoint) ? array.getLongOptimistic(key, programPoint) : array.getLong(key);
2890 }
2891
2892 return getLong(index, JSType.toString(key), programPoint);
2893 }
2894
2895 private double getDouble(final int index, final String key, final int programPoint) {
2896 if (isValidArrayIndex(index)) {
2897 for (ScriptObject object = this; ; ) {
2898 if (object.getMap().containsArrayKeys()) {
2899 final FindProperty find = object.findProperty(key, false, this);
2900 if (find != null) {
2901 return getDoubleValue(find, programPoint);
2902 }
2903 }
2904
2905 if ((object = object.getProto()) == null) {
2906 break;
2907 }
2908
2909 final ArrayData array = object.getArray();
2910
2911 if (array.has(index)) {
2912 return isValid(programPoint) ?
2913 array.getDoubleOptimistic(index, programPoint) :
2914 array.getDouble(index);
2915 }
2916 }
2917 } else {
2918 final FindProperty find = findProperty(key, true);
2919
2920 if (find != null) {
2921 return getDoubleValue(find, programPoint);
2922 }
2923 }
2924
2925 return JSType.toNumber(invokeNoSuchProperty(key, INVALID_PROGRAM_POINT));
2926 }
2927
2928 @Override
2929 public double getDouble(final Object key, final int programPoint) {
2930 final Object primitiveKey = JSType.toPrimitive(key, String.class);
2931 final int index = getArrayIndex(primitiveKey);
2932 final ArrayData array = getArray();
2933
2934 if (array.has(index)) {
2935 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index);
2936 }
2937
2938 return getDouble(index, JSType.toString(primitiveKey), programPoint);
2939 }
2940
2941 @Override
2942 public double getDouble(final double key, final int programPoint) {
2943 final int index = getArrayIndex(key);
2944 final ArrayData array = getArray();
2945
2946 if (array.has(index)) {
2947 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index);
2948 }
2949
2950 return getDouble(index, JSType.toString(key), programPoint);
2951 }
2952
2953 @Override
2954 public double getDouble(final long key, final int programPoint) {
2955 final int index = getArrayIndex(key);
2956 final ArrayData array = getArray();
2957
2958 if (array.has(index)) {
2959 return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index);
2960 }
2961
2962 return getDouble(index, JSType.toString(key), programPoint);
2963 }
2964
2965 @Override
2966 public double getDouble(final int key, final int programPoint) {
2967 final int index = getArrayIndex(key);
2968 final ArrayData array = getArray();
2969
2970 if (array.has(index)) {
2971 return isValid(programPoint) ? array.getDoubleOptimistic(key, programPoint) : array.getDouble(key);
2972 }
2973
2974 return getDouble(index, JSType.toString(key), programPoint);
2975 }
2976
2977 private Object get(final int index, final String key) {
2978 if (isValidArrayIndex(index)) {
2979 for (ScriptObject object = this; ; ) {
2980 if (object.getMap().containsArrayKeys()) {
2981 final FindProperty find = object.findProperty(key, false, this);
2982
2983 if (find != null) {
2984 return find.getObjectValue();
2985 }
2986 }
2987
2988 if ((object = object.getProto()) == null) {
2989 break;
2990 }
2991
2992 final ArrayData array = object.getArray();
2993
2994 if (array.has(index)) {
2995 return array.getObject(index);
2996 }
2997 }
2998 } else {
2999 final FindProperty find = findProperty(key, true);
3000
3001 if (find != null) {
3002 return find.getObjectValue();
3003 }
3004 }
3005
3006 return invokeNoSuchProperty(key, INVALID_PROGRAM_POINT);
3007 }
3008
3009 @Override
3010 public Object get(final Object key) {
3011 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3012 final int index = getArrayIndex(primitiveKey);
3013 final ArrayData array = getArray();
3014
3015 if (array.has(index)) {
3016 return array.getObject(index);
3017 }
3018
3019 return get(index, JSType.toString(primitiveKey));
3020 }
3021
3022 @Override
3023 public Object get(final double key) {
3024 final int index = getArrayIndex(key);
3025 final ArrayData array = getArray();
3026
3027 if (array.has(index)) {
3028 return array.getObject(index);
3029 }
3030
3031 return get(index, JSType.toString(key));
3032 }
3033
3034 @Override
3035 public Object get(final long key) {
3036 final int index = getArrayIndex(key);
3037 final ArrayData array = getArray();
3038
3039 if (array.has(index)) {
3040 return array.getObject(index);
3041 }
3042
3043 return get(index, JSType.toString(key));
3044 }
3045
3046 @Override
3047 public Object get(final int key) {
3048 final int index = getArrayIndex(key);
3049 final ArrayData array = getArray();
3050
3051 if (array.has(index)) {
3052 return array.getObject(index);
3053 }
3054
3055 return get(index, JSType.toString(key));
3056 }
3057
3058 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final int value, final int callSiteFlags) {
3059 if (getMap().containsArrayKeys()) {
3060 final String key = JSType.toString(longIndex);
3061 final FindProperty find = findProperty(key, true);
3062 if (find != null) {
3063 setObject(find, callSiteFlags, key, value);
3064 return true;
3065 }
3066 }
3067 return false;
3068 }
3069
3070 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final long value, final int callSiteFlags) {
3071 if (getMap().containsArrayKeys()) {
3072 final String key = JSType.toString(longIndex);
3073 final FindProperty find = findProperty(key, true);
3074 if (find != null) {
3075 setObject(find, callSiteFlags, key, value);
3076 return true;
3077 }
3078 }
3079 return false;
3080 }
3081
3082 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final double value, final int callSiteFlags) {
3083 if (getMap().containsArrayKeys()) {
3084 final String key = JSType.toString(longIndex);
3085 final FindProperty find = findProperty(key, true);
3086 if (find != null) {
3087 setObject(find, callSiteFlags, key, value);
3088 return true;
3089 }
3090 }
3091 return false;
3092 }
3093
3094 private boolean doesNotHaveCheckArrayKeys(final long longIndex, final Object value, final int callSiteFlags) {
3095 if (getMap().containsArrayKeys()) {
3096 final String key = JSType.toString(longIndex);
3097 final FindProperty find = findProperty(key, true);
3098 if (find != null) {
3099 setObject(find, callSiteFlags, key, value);
3100 return true;
3101 }
3102 }
3103 return false;
3104 }
3105
3106 //value agnostic
3107 private boolean doesNotHaveEnsureLength(final long longIndex, final long oldLength, final int callSiteFlags) {
3108 if (longIndex >= oldLength) {
3109 if (!isExtensible()) {
3110 if (isStrictFlag(callSiteFlags)) {
3111 throw typeError("object.non.extensible", JSType.toString(longIndex), ScriptRuntime.safeToString(this));
3112 }
3113 return true;
3114 }
3115 setArray(getArray().ensure(longIndex));
3116 }
3117 return false;
3118 }
3119
3120 private void doesNotHaveEnsureDelete(final long longIndex, final long oldLength, final boolean strict) {
3121 if (longIndex > oldLength) {
3122 ArrayData array = getArray();
3123 if (array.canDelete(oldLength, longIndex - 1, strict)) {
3124 array = array.delete(oldLength, longIndex - 1);
3125 }
3126 setArray(array);
3127 }
3128 }
3129
3130 private void doesNotHave(final int index, final int value, final int callSiteFlags) {
3131 final long oldLength = getArray().length();
3132 final long longIndex = ArrayIndex.toLongIndex(index);
3133 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
3134 final boolean strict = isStrictFlag(callSiteFlags);
3135 setArray(getArray().set(index, value, strict));
3136 doesNotHaveEnsureDelete(longIndex, oldLength, strict);
3137 }
3138 }
3139
3140 private void doesNotHave(final int index, final long value, final int callSiteFlags) {
3141 final long oldLength = getArray().length();
3142 final long longIndex = ArrayIndex.toLongIndex(index);
3143 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
3144 final boolean strict = isStrictFlag(callSiteFlags);
3145 setArray(getArray().set(index, value, strict));
3146 doesNotHaveEnsureDelete(longIndex, oldLength, strict);
3147 }
3148 }
3149
3150 private void doesNotHave(final int index, final double value, final int callSiteFlags) {
3151 final long oldLength = getArray().length();
3152 final long longIndex = ArrayIndex.toLongIndex(index);
3153 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
3154 final boolean strict = isStrictFlag(callSiteFlags);
3155 setArray(getArray().set(index, value, strict));
3156 doesNotHaveEnsureDelete(longIndex, oldLength, strict);
3157 }
3158 }
3159
3160 private void doesNotHave(final int index, final Object value, final int callSiteFlags) {
3161 final long oldLength = getArray().length();
3162 final long longIndex = ArrayIndex.toLongIndex(index);
3163 if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
3164 final boolean strict = isStrictFlag(callSiteFlags);
3165 setArray(getArray().set(index, value, strict));
3166 doesNotHaveEnsureDelete(longIndex, oldLength, strict);
3167 }
3168 }
3169
3170 /**
3171 * This is the most generic of all Object setters. Most of the others use this in some form.
3172 * TODO: should be further specialized
3173 *
3174 * @param find found property
3175 * @param callSiteFlags callsite flags
3176 * @param key property key
3177 * @param value property value
3178 */
3179 public final void setObject(final FindProperty find, final int callSiteFlags, final String key, final Object value) {
3180 FindProperty f = find;
3181
3182 invalidateGlobalConstant(key);
3183
3184 if (f != null && f.isInherited() && !(f.getProperty() instanceof UserAccessorProperty)) {
3185 final boolean isScope = isScopeFlag(callSiteFlags);
3186 // If the start object of the find is not this object it means the property was found inside a
3187 // 'with' statement expression (see WithObject.findProperty()). In this case we forward the 'set'
3188 // to the 'with' object.
3189 // Note that although a 'set' operation involving a with statement follows scope rules outside
3190 // the 'with' expression (the 'set' operation is performed on the owning prototype if it exists),
3191 // it follows non-scope rules inside the 'with' expression (set is performed on the top level object).
3192 // This is why we clear the callsite flags and FindProperty in the forward call to the 'with' object.
3193 if (isScope && f.getSelf() != this) {
3194 f.getSelf().setObject(null, 0, key, value);
3195 return;
3196 }
3197 // Setting a property should not modify the property in prototype unless this is a scope callsite
3198 // and the owner is a scope object as well (with the exception of 'with' statement handled above).
3199 if (!isScope || !f.getOwner().isScope()) {
3200 f = null;
3201 }
3202 }
3203
3204 if (f != null) {
3205 if (!f.getProperty().isWritable()) {
3206 if (isScopeFlag(callSiteFlags) && f.getProperty().isLexicalBinding()) {
3207 throw typeError("assign.constant", key); // Overwriting ES6 const should throw also in non-strict mode.
3208 }
3209 if (isStrictFlag(callSiteFlags)) {
3210 throw typeError("property.not.writable", key, ScriptRuntime.safeToString(this));
3211 }
3212 return;
3213 }
3214
3215 f.setValue(value, isStrictFlag(callSiteFlags));
3216
3217 } else if (!isExtensible()) {
3218 if (isStrictFlag(callSiteFlags)) {
3219 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this));
3220 }
3221 } else {
3222 ScriptObject sobj = this;
3223 // undefined scope properties are set in the global object.
3224 if (isScope()) {
3225 while (sobj != null && !(sobj instanceof Global)) {
3226 sobj = sobj.getProto();
3227 }
3228 assert sobj != null : "no parent global object in scope";
3229 }
3230 //this will unbox any Number object to its primitive type in case the
3231 //property supports primitive types, so it doesn't matter that it comes
3232 //in as an Object.
3233 sobj.addSpillProperty(key, 0, value, true);
3234 }
3235 }
3236
3237 @Override
3238 public void set(final Object key, final int value, final int callSiteFlags) {
3239 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3240 final int index = getArrayIndex(primitiveKey);
3241
3242 if (isValidArrayIndex(index)) {
3243 final ArrayData data = getArray();
3244 if (data.has(index)) {
3245 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3246 } else {
3247 doesNotHave(index, value, callSiteFlags);
3248 }
3249
3250 return;
3251 }
3252
3253 final String propName = JSType.toString(primitiveKey);
3254 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3255 }
3256
3257 @Override
3258 public void set(final Object key, final long value, final int callSiteFlags) {
3259 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3260 final int index = getArrayIndex(primitiveKey);
3261
3262 if (isValidArrayIndex(index)) {
3263 final ArrayData data = getArray();
3264 if (data.has(index)) {
3265 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3266 } else {
3267 doesNotHave(index, value, callSiteFlags);
3268 }
3269
3270 return;
3271 }
3272
3273 final String propName = JSType.toString(primitiveKey);
3274 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3275 }
3276
3277 @Override
3278 public void set(final Object key, final double value, final int callSiteFlags) {
3279 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3280 final int index = getArrayIndex(primitiveKey);
3281
3282 if (isValidArrayIndex(index)) {
3283 final ArrayData data = getArray();
3284 if (data.has(index)) {
3285 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3286 } else {
3287 doesNotHave(index, value, callSiteFlags);
3288 }
3289
3290 return;
3291 }
3292
3293 final String propName = JSType.toString(primitiveKey);
3294 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3295 }
3296
3297 @Override
3298 public void set(final Object key, final Object value, final int callSiteFlags) {
3299 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3300 final int index = getArrayIndex(primitiveKey);
3301
3302 if (isValidArrayIndex(index)) {
3303 final ArrayData data = getArray();
3304 if (data.has(index)) {
3305 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3306 } else {
3307 doesNotHave(index, value, callSiteFlags);
3308 }
3309
3310 return;
3311 }
3312
3313 final String propName = JSType.toString(primitiveKey);
3314 setObject(findProperty(propName, true), callSiteFlags, propName, value);
3315 }
3316
3317 @Override
3318 public void set(final double key, final int value, final int callSiteFlags) {
3319 final int index = getArrayIndex(key);
3320
3321 if (isValidArrayIndex(index)) {
3322 final ArrayData data = getArray();
3323 if (data.has(index)) {
3324 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3325 } else {
3326 doesNotHave(index, value, callSiteFlags);
3327 }
3328
3329 return;
3330 }
3331
3332 final String propName = JSType.toString(key);
3333 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3334 }
3335
3336 @Override
3337 public void set(final double key, final long value, final int callSiteFlags) {
3338 final int index = getArrayIndex(key);
3339
3340 if (isValidArrayIndex(index)) {
3341 final ArrayData data = getArray();
3342 if (data.has(index)) {
3343 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3344 } else {
3345 doesNotHave(index, value, callSiteFlags);
3346 }
3347
3348 return;
3349 }
3350
3351 final String propName = JSType.toString(key);
3352 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3353 }
3354
3355 @Override
3356 public void set(final double key, final double value, final int callSiteFlags) {
3357 final int index = getArrayIndex(key);
3358
3359 if (isValidArrayIndex(index)) {
3360 final ArrayData data = getArray();
3361 if (data.has(index)) {
3362 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3363 } else {
3364 doesNotHave(index, value, callSiteFlags);
3365 }
3366
3367 return;
3368 }
3369
3370 final String propName = JSType.toString(key);
3371 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3372 }
3373
3374 @Override
3375 public void set(final double key, final Object value, final int callSiteFlags) {
3376 final int index = getArrayIndex(key);
3377
3378 if (isValidArrayIndex(index)) {
3379 final ArrayData data = getArray();
3380 if (data.has(index)) {
3381 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3382 } else {
3383 doesNotHave(index, value, callSiteFlags);
3384 }
3385
3386 return;
3387 }
3388
3389 final String propName = JSType.toString(key);
3390 setObject(findProperty(propName, true), callSiteFlags, propName, value);
3391 }
3392
3393 @Override
3394 public void set(final long key, final int value, final int callSiteFlags) {
3395 final int index = getArrayIndex(key);
3396
3397 if (isValidArrayIndex(index)) {
3398 final ArrayData data = getArray();
3399 if (data.has(index)) {
3400 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3401 } else {
3402 doesNotHave(index, value, callSiteFlags);
3403 }
3404
3405 return;
3406 }
3407
3408 final String propName = JSType.toString(key);
3409 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3410 }
3411
3412 @Override
3413 public void set(final long key, final long value, final int callSiteFlags) {
3414 final int index = getArrayIndex(key);
3415
3416 if (isValidArrayIndex(index)) {
3417 final ArrayData data = getArray();
3418 if (data.has(index)) {
3419 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3420 } else {
3421 doesNotHave(index, value, callSiteFlags);
3422 }
3423
3424 return;
3425 }
3426
3427 final String propName = JSType.toString(key);
3428 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3429 }
3430
3431 @Override
3432 public void set(final long key, final double value, final int callSiteFlags) {
3433 final int index = getArrayIndex(key);
3434
3435 if (isValidArrayIndex(index)) {
3436 final ArrayData data = getArray();
3437 if (data.has(index)) {
3438 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3439 } else {
3440 doesNotHave(index, value, callSiteFlags);
3441 }
3442
3443 return;
3444 }
3445
3446 final String propName = JSType.toString(key);
3447 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3448 }
3449
3450 @Override
3451 public void set(final long key, final Object value, final int callSiteFlags) {
3452 final int index = getArrayIndex(key);
3453
3454 if (isValidArrayIndex(index)) {
3455 final ArrayData data = getArray();
3456 if (data.has(index)) {
3457 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3458 } else {
3459 doesNotHave(index, value, callSiteFlags);
3460 }
3461
3462 return;
3463 }
3464
3465 final String propName = JSType.toString(key);
3466 setObject(findProperty(propName, true), callSiteFlags, propName, value);
3467 }
3468
3469 @Override
3470 public void set(final int key, final int value, final int callSiteFlags) {
3471 final int index = getArrayIndex(key);
3472 if (isValidArrayIndex(index)) {
3473 if (getArray().has(index)) {
3474 final ArrayData data = getArray();
3475 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3476 } else {
3477 doesNotHave(index, value, callSiteFlags);
3478 }
3479 return;
3480 }
3481
3482 final String propName = JSType.toString(key);
3483 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3484 }
3485
3486 @Override
3487 public void set(final int key, final long value, final int callSiteFlags) {
3488 final int index = getArrayIndex(key);
3489
3490 if (isValidArrayIndex(index)) {
3491 final ArrayData data = getArray();
3492 if (data.has(index)) {
3493 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3494 } else {
3495 doesNotHave(index, value, callSiteFlags);
3496 }
3497
3498 return;
3499 }
3500
3501 final String propName = JSType.toString(key);
3502 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3503 }
3504
3505 @Override
3506 public void set(final int key, final double value, final int callSiteFlags) {
3507 final int index = getArrayIndex(key);
3508
3509 if (isValidArrayIndex(index)) {
3510 final ArrayData data = getArray();
3511 if (data.has(index)) {
3512 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3513 } else {
3514 doesNotHave(index, value, callSiteFlags);
3515 }
3516
3517 return;
3518 }
3519
3520 final String propName = JSType.toString(key);
3521 setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
3522 }
3523
3524 @Override
3525 public void set(final int key, final Object value, final int callSiteFlags) {
3526 final int index = getArrayIndex(key);
3527
3528 if (isValidArrayIndex(index)) {
3529 final ArrayData data = getArray();
3530 if (data.has(index)) {
3531 setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
3532 } else {
3533 doesNotHave(index, value, callSiteFlags);
3534 }
3535
3536 return;
3537 }
3538
3539 final String propName = JSType.toString(key);
3540 setObject(findProperty(propName, true), callSiteFlags, propName, value);
3541 }
3542
3543 @Override
3544 public boolean has(final Object key) {
3545 final Object primitiveKey = JSType.toPrimitive(key);
3546 final int index = getArrayIndex(primitiveKey);
3547 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), true);
3548 }
3549
3550 @Override
3551 public boolean has(final double key) {
3552 final int index = getArrayIndex(key);
3553 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
3554 }
3555
3556 @Override
3557 public boolean has(final long key) {
3558 final int index = getArrayIndex(key);
3559 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
3560 }
3561
3562 @Override
3563 public boolean has(final int key) {
3564 final int index = getArrayIndex(key);
3565 return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
3566 }
3567
3568 private boolean hasArrayProperty(final int index) {
3569 boolean hasArrayKeys = false;
3570
3571 for (ScriptObject self = this; self != null; self = self.getProto()) {
3572 if (self.getArray().has(index)) {
3573 return true;
3574 }
3575 hasArrayKeys = hasArrayKeys || self.getMap().containsArrayKeys();
3576 }
3577
3578 return hasArrayKeys && hasProperty(ArrayIndex.toKey(index), true);
3579 }
3580
3581 @Override
3582 public boolean hasOwnProperty(final Object key) {
3583 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3584 final int index = getArrayIndex(primitiveKey);
3585 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(primitiveKey), false);
3586 }
3587
3588 @Override
3589 public boolean hasOwnProperty(final int key) {
3590 final int index = getArrayIndex(key);
3591 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
3592 }
3593
3594 @Override
3595 public boolean hasOwnProperty(final long key) {
3596 final int index = getArrayIndex(key);
3597 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
3598 }
3599
3600 @Override
3601 public boolean hasOwnProperty(final double key) {
3602 final int index = getArrayIndex(key);
3603 return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
3604 }
3605
3606 private boolean hasOwnArrayProperty(final int index) {
3607 return getArray().has(index) || getMap().containsArrayKeys() && hasProperty(ArrayIndex.toKey(index), false);
3608 }
3609
3610 @Override
3611 public boolean delete(final int key, final boolean strict) {
3612 final int index = getArrayIndex(key);
3613 final ArrayData array = getArray();
3614
3615 if (array.has(index)) {
3616 if (array.canDelete(index, strict)) {
3617 setArray(array.delete(index));
3618 return true;
3619 }
3620 return false;
3621 }
3622 return deleteObject(JSType.toObject(key), strict);
3623 }
3624
3625 @Override
3626 public boolean delete(final long key, final boolean strict) {
3627 final int index = getArrayIndex(key);
3628 final ArrayData array = getArray();
3629
3630 if (array.has(index)) {
3631 if (array.canDelete(index, strict)) {
3632 setArray(array.delete(index));
3633 return true;
3634 }
3635 return false;
3636 }
3637
3638 return deleteObject(JSType.toObject(key), strict);
3639 }
3640
3641 @Override
3642 public boolean delete(final double key, final boolean strict) {
3643 final int index = getArrayIndex(key);
3644 final ArrayData array = getArray();
3645
3646 if (array.has(index)) {
3647 if (array.canDelete(index, strict)) {
3648 setArray(array.delete(index));
3649 return true;
3650 }
3651 return false;
3652 }
3653
3654 return deleteObject(JSType.toObject(key), strict);
3655 }
3656
3657 @Override
3658 public boolean delete(final Object key, final boolean strict) {
3659 final Object primitiveKey = JSType.toPrimitive(key, String.class);
3660 final int index = getArrayIndex(primitiveKey);
3661 final ArrayData array = getArray();
3662
3663 if (array.has(index)) {
3664 if (array.canDelete(index, strict)) {
3665 setArray(array.delete(index));
3666 return true;
3667 }
3668 return false;
3669 }
3670
3671 return deleteObject(primitiveKey, strict);
3672 }
3673
3674 private boolean deleteObject(final Object key, final boolean strict) {
3675 final String propName = JSType.toString(key);
3676 final FindProperty find = findProperty(propName, false);
3677
3678 if (find == null) {
3679 return true;
3680 }
3681
3682 if (!find.getProperty().isConfigurable()) {
3683 if (strict) {
3684 throw typeError("cant.delete.property", propName, ScriptRuntime.safeToString(this));
3685 }
3686 return false;
3687 }
3688
3689 final Property prop = find.getProperty();
3690 deleteOwnProperty(prop);
3691
3692 return true;
3693 }
3694
3695 /**
3696 * Return a shallow copy of this ScriptObject.
3697 * @return a shallow copy.
3698 */
3699 public final ScriptObject copy() {
3700 try {
3701 return clone();
3702 } catch (final CloneNotSupportedException e) {
3703 throw new RuntimeException(e);
3704 }
3705 }
3706
3707 @Override
3708 protected ScriptObject clone() throws CloneNotSupportedException {
3709 final ScriptObject clone = (ScriptObject) super.clone();
3710 if (objectSpill != null) {
3711 clone.objectSpill = objectSpill.clone();
3712 clone.primitiveSpill = primitiveSpill.clone();
3713 }
3714 clone.arrayData = arrayData.copy();
3715 return clone;
3716 }
3717
3718 /**
3719 * Make a new UserAccessorProperty property. getter and setter functions are stored in
3720 * this ScriptObject and slot values are used in property object.
3721 *
3722 * @param key the property name
3723 * @param propertyFlags attribute flags of the property
3724 * @param getter getter function for the property
3725 * @param setter setter function for the property
3726 * @return the newly created UserAccessorProperty
3727 */
3728 protected final UserAccessorProperty newUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
3729 final UserAccessorProperty uc = getMap().newUserAccessors(key, propertyFlags);
3730 //property.getSetter(Object.class, getMap());
3731 uc.setAccessors(this, getMap(), new UserAccessorProperty.Accessors(getter, setter));
3732 return uc;
3733 }
3734
3735 Object ensureSpillSize(final int slot) {
3736 if (slot < spillLength) {
3737 return this;
3738 }
3739 final int newLength = alignUp(slot + 1, SPILL_RATE);
3740 final Object[] newObjectSpill = new Object[newLength];
3741 final long[] newPrimitiveSpill = OBJECT_FIELDS_ONLY ? null : new long[newLength];
3742
3743 if (objectSpill != null) {
3744 System.arraycopy(objectSpill, 0, newObjectSpill, 0, spillLength);
3745 if (!OBJECT_FIELDS_ONLY) {
3746 System.arraycopy(primitiveSpill, 0, newPrimitiveSpill, 0, spillLength);
3747 }
3748 }
3749
3750 this.primitiveSpill = newPrimitiveSpill;
3751 this.objectSpill = newObjectSpill;
3752 this.spillLength = newLength;
3753
3754 return this;
3755 }
3756
3757 private static MethodHandle findOwnMH_V(final Class<? extends ScriptObject> clazz, final String name, final Class<?> rtype, final Class<?>... types) {
3758 // TODO: figure out how can it work for NativeArray$Prototype etc.
3759 return MH.findVirtual(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types));
3760 }
3761
3762 private static MethodHandle findOwnMH_V(final String name, final Class<?> rtype, final Class<?>... types) {
3763 return findOwnMH_V(ScriptObject.class, name, rtype, types);
3764 }
3765
3766 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
3767 return MH.findStatic(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types));
3768 }
3769
3770 private static MethodHandle getKnownFunctionPropertyGuardSelf(final PropertyMap map, final MethodHandle getter, final ScriptFunction func) {
3771 return MH.insertArguments(KNOWNFUNCPROPGUARDSELF, 1, map, getter, func);
3772 }
3773
3774 @SuppressWarnings("unused")
3775 private static boolean knownFunctionPropertyGuardSelf(final Object self, final PropertyMap map, final MethodHandle getter, final ScriptFunction func) {
3776 if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) {
3777 try {
3778 return getter.invokeExact(self) == func;
3779 } catch (final RuntimeException | Error e) {
3780 throw e;
3781 } catch (final Throwable t) {
3782 throw new RuntimeException(t);
3783 }
3784 }
3785
3786 return false;
3787 }
3788
3789 private static MethodHandle getKnownFunctionPropertyGuardProto(final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) {
3790 return MH.insertArguments(KNOWNFUNCPROPGUARDPROTO, 1, map, getter, depth, func);
3791 }
3792
3793 private static ScriptObject getProto(final ScriptObject self, final int depth) {
3794 ScriptObject proto = self;
3795 for (int d = 0; d < depth; d++) {
3796 proto = proto.getProto();
3797 if (proto == null) {
3798 return null;
3799 }
3800 }
3801
3802 return proto;
3803 }
3804
3805 @SuppressWarnings("unused")
3806 private static boolean knownFunctionPropertyGuardProto(final Object self, final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) {
3807 if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) {
3808 final ScriptObject proto = getProto((ScriptObject)self, depth);
3809 if (proto == null) {
3810 return false;
3811 }
3812 try {
3813 return getter.invokeExact((Object)proto) == func;
3814 } catch (final RuntimeException | Error e) {
3815 throw e;
3816 } catch (final Throwable t) {
3817 throw new RuntimeException(t);
3818 }
3819 }
3820
3821 return false;
3822 }
3823
3824 /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created */
3825 private static int count;
3826
3827 /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created that are scope */
3828 private static int scopeCount;
3829
3830 /**
3831 * Get number of {@code ScriptObject} instances created. If not running in debug
3832 * mode this is always 0
3833 *
3834 * @return number of ScriptObjects created
3835 */
3836 public static int getCount() {
3837 return count;
3838 }
3839
3840 /**
3841 * Get number of scope {@code ScriptObject} instances created. If not running in debug
3842 * mode this is always 0
3843 *
3844 * @return number of scope ScriptObjects created
3845 */
3846 public static int getScopeCount() {
3847 return scopeCount;
3848 }
3849
3850 }