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.ObjectClassGenerator.PRIMITIVE_FIELD_TYPE;
29 import static jdk.nashorn.internal.codegen.ObjectClassGenerator.createGetter;
30 import static jdk.nashorn.internal.codegen.ObjectClassGenerator.createSetter;
31 import static jdk.nashorn.internal.codegen.ObjectClassGenerator.getFieldCount;
32 import static jdk.nashorn.internal.codegen.ObjectClassGenerator.getFieldName;
33 import static jdk.nashorn.internal.lookup.Lookup.MH;
34 import static jdk.nashorn.internal.lookup.MethodHandleFactory.stripName;
35 import static jdk.nashorn.internal.runtime.JSType.getAccessorTypeIndex;
36 import static jdk.nashorn.internal.runtime.JSType.getNumberOfAccessorTypes;
37 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
38 import java.io.IOException;
39 import java.io.ObjectInputStream;
40 import java.lang.invoke.MethodHandle;
41 import java.lang.invoke.MethodHandles;
42 import java.lang.invoke.SwitchPoint;
43 import java.util.function.Supplier;
44 import java.util.logging.Level;
45 import jdk.nashorn.internal.codegen.ObjectClassGenerator;
46 import jdk.nashorn.internal.codegen.types.Type;
47 import jdk.nashorn.internal.lookup.Lookup;
48 import jdk.nashorn.internal.objects.Global;
49
50 /**
51 * An AccessorProperty is the most generic property type. An AccessorProperty is
52 * represented as fields in a ScriptObject class.
53 */
54 public class AccessorProperty extends Property {
55 private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
56
57 private static final MethodHandle REPLACE_MAP = findOwnMH_S("replaceMap", Object.class, Object.class, PropertyMap.class);
58 private static final MethodHandle INVALIDATE_SP = findOwnMH_S("invalidateSwitchPoint", Object.class, AccessorProperty.class, Object.class);
59
60 private static final int NOOF_TYPES = getNumberOfAccessorTypes();
61 private static final long serialVersionUID = 3371720170182154920L;
62
63 /**
64 * Properties in different maps for the same structure class will share their field getters and setters. This could
65 * be further extended to other method handles that are looked up in the AccessorProperty constructor, but right now
66 * these are the most frequently retrieved ones, and lookup of method handle natives only registers in the profiler
67 * for them.
68 */
69 private static ClassValue<Accessors> GETTERS_SETTERS = new ClassValue<Accessors>() {
70 @Override
71 protected Accessors computeValue(final Class<?> structure) {
72 return new Accessors(structure);
73 }
74 };
75
76 private static class Accessors {
77 final MethodHandle[] objectGetters;
78 final MethodHandle[] objectSetters;
79 final MethodHandle[] primitiveGetters;
80 final MethodHandle[] primitiveSetters;
81
82 /**
83 * Normal
84 * @param structure
85 */
86 Accessors(final Class<?> structure) {
87 final int fieldCount = getFieldCount(structure);
88 objectGetters = new MethodHandle[fieldCount];
89 objectSetters = new MethodHandle[fieldCount];
90 primitiveGetters = new MethodHandle[fieldCount];
91 primitiveSetters = new MethodHandle[fieldCount];
92
93 for (int i = 0; i < fieldCount; i++) {
94 final String fieldName = getFieldName(i, Type.OBJECT);
95 final Class<?> typeClass = Type.OBJECT.getTypeClass();
96 objectGetters[i] = MH.asType(MH.getter(LOOKUP, structure, fieldName, typeClass), Lookup.GET_OBJECT_TYPE);
97 objectSetters[i] = MH.asType(MH.setter(LOOKUP, structure, fieldName, typeClass), Lookup.SET_OBJECT_TYPE);
98 }
99
100 if (!StructureLoader.isSingleFieldStructure(structure.getName())) {
101 for (int i = 0; i < fieldCount; i++) {
102 final String fieldNamePrimitive = getFieldName(i, PRIMITIVE_FIELD_TYPE);
103 final Class<?> typeClass = PRIMITIVE_FIELD_TYPE.getTypeClass();
104 primitiveGetters[i] = MH.asType(MH.getter(LOOKUP, structure, fieldNamePrimitive, typeClass), Lookup.GET_PRIMITIVE_TYPE);
105 primitiveSetters[i] = MH.asType(MH.setter(LOOKUP, structure, fieldNamePrimitive, typeClass), Lookup.SET_PRIMITIVE_TYPE);
106 }
107 }
108 }
109 }
110
111 /**
112 * Property getter cache
113 * Note that we can't do the same simple caching for optimistic getters,
114 * due to the fact that they are bound to a program point, which will
115 * produce different boun method handles wrapping the same access mechanism
116 * depending on callsite
117 */
118 private transient MethodHandle[] GETTER_CACHE = new MethodHandle[NOOF_TYPES];
119
120 /**
121 * Create a new accessor property. Factory method used by nasgen generated code.
122 *
123 * @param key {@link Property} key.
124 * @param propertyFlags {@link Property} flags.
125 * @param getter {@link Property} get accessor method.
126 * @param setter {@link Property} set accessor method.
127 *
128 * @return New {@link AccessorProperty} created.
129 */
130 public static AccessorProperty create(final Object key, final int propertyFlags, final MethodHandle getter, final MethodHandle setter) {
131 return new AccessorProperty(key, propertyFlags, -1, getter, setter);
132 }
133
134 /** Seed getter for the primitive version of this field (in -Dnashorn.fields.dual=true mode) */
135 transient MethodHandle primitiveGetter;
136
137 /** Seed setter for the primitive version of this field (in -Dnashorn.fields.dual=true mode) */
138 transient MethodHandle primitiveSetter;
139
140 /** Seed getter for the Object version of this field */
141 transient MethodHandle objectGetter;
142
143 /** Seed setter for the Object version of this field */
144 transient MethodHandle objectSetter;
145
146 /**
147 * Delegate constructor for bound properties. This is used for properties created by
148 * {@link ScriptRuntime#mergeScope} and the Nashorn {@code Object.bindProperties} method.
149 * The former is used to add a script's defined globals to the current global scope while
150 * still storing them in a JO-prefixed ScriptObject class.
151 *
152 * <p>All properties created by this constructor have the {@link #IS_BOUND} flag set.</p>
153 *
154 * @param property accessor property to rebind
155 * @param delegate delegate object to rebind receiver to
156 */
157 AccessorProperty(final AccessorProperty property, final Object delegate) {
158 super(property, property.getFlags() | IS_BOUND);
159
160 this.primitiveGetter = bindTo(property.primitiveGetter, delegate);
161 this.primitiveSetter = bindTo(property.primitiveSetter, delegate);
162 this.objectGetter = bindTo(property.objectGetter, delegate);
163 this.objectSetter = bindTo(property.objectSetter, delegate);
164 property.GETTER_CACHE = new MethodHandle[NOOF_TYPES];
165 // Properties created this way are bound to a delegate
166 setType(property.getType());
167 }
168
169 /**
170 * SPILL PROPERTY or USER ACCESSOR PROPERTY abstract constructor
171 *
172 * Constructor for spill properties. Array getters and setters will be created on demand.
173 *
174 * @param key the property key
175 * @param flags the property flags
176 * @param slot spill slot
177 * @param primitiveGetter primitive getter
178 * @param primitiveSetter primitive setter
179 * @param objectGetter object getter
180 * @param objectSetter object setter
181 */
182 protected AccessorProperty(
183 final Object key,
184 final int flags,
185 final int slot,
186 final MethodHandle primitiveGetter,
187 final MethodHandle primitiveSetter,
188 final MethodHandle objectGetter,
189 final MethodHandle objectSetter) {
190 super(key, flags, slot);
191 assert getClass() != AccessorProperty.class;
192 this.primitiveGetter = primitiveGetter;
193 this.primitiveSetter = primitiveSetter;
194 this.objectGetter = objectGetter;
195 this.objectSetter = objectSetter;
196 initializeType();
197 }
198
199 /**
200 * NASGEN constructor
201 *
202 * Constructor. Similar to the constructor with both primitive getters and setters, the difference
203 * here being that only one getter and setter (setter is optional for non writable fields) is given
204 * to the constructor, and the rest are created from those. Used e.g. by Nasgen classes
205 *
206 * @param key the property key
207 * @param flags the property flags
208 * @param slot the property field number or spill slot
209 * @param getter the property getter
210 * @param setter the property setter or null if non writable, non configurable
211 */
212 private AccessorProperty(final Object key, final int flags, final int slot, final MethodHandle getter, final MethodHandle setter) {
213 super(key, flags | IS_BUILTIN | DUAL_FIELDS | (getter.type().returnType().isPrimitive() ? IS_NASGEN_PRIMITIVE : 0), slot);
214 assert !isSpill();
215
216 // we don't need to prep the setters these will never be invalidated as this is a nasgen
217 // or known type getter/setter. No invalidations will take place
218
219 final Class<?> getterType = getter.type().returnType();
220 final Class<?> setterType = setter == null ? null : setter.type().parameterType(1);
221
222 assert setterType == null || setterType == getterType;
223
224 if (getterType == int.class) {
225 primitiveGetter = MH.asType(getter, Lookup.GET_PRIMITIVE_TYPE);
226 primitiveSetter = setter == null ? null : MH.asType(setter, Lookup.SET_PRIMITIVE_TYPE);
227 } else if (getterType == double.class) {
228 primitiveGetter = MH.asType(MH.filterReturnValue(getter, ObjectClassGenerator.PACK_DOUBLE), Lookup.GET_PRIMITIVE_TYPE);
229 primitiveSetter = setter == null ? null : MH.asType(MH.filterArguments(setter, 1, ObjectClassGenerator.UNPACK_DOUBLE), Lookup.SET_PRIMITIVE_TYPE);
230 } else {
231 primitiveGetter = primitiveSetter = null;
232 }
233
234 assert primitiveGetter == null || primitiveGetter.type() == Lookup.GET_PRIMITIVE_TYPE : primitiveGetter + "!=" + Lookup.GET_PRIMITIVE_TYPE;
235 assert primitiveSetter == null || primitiveSetter.type() == Lookup.SET_PRIMITIVE_TYPE : primitiveSetter;
236
237 objectGetter = getter.type() != Lookup.GET_OBJECT_TYPE ? MH.asType(getter, Lookup.GET_OBJECT_TYPE) : getter;
238 objectSetter = setter != null && setter.type() != Lookup.SET_OBJECT_TYPE ? MH.asType(setter, Lookup.SET_OBJECT_TYPE) : setter;
239
240 setType(getterType);
241 }
242
243 /**
244 * Normal ACCESS PROPERTY constructor given a structure class.
245 * Constructor for dual field AccessorPropertys.
246 *
247 * @param key property key
248 * @param flags property flags
249 * @param structure structure for objects associated with this property
250 * @param slot property field number or spill slot
251 */
252 public AccessorProperty(final Object key, final int flags, final Class<?> structure, final int slot) {
253 super(key, flags, slot);
254
255 initGetterSetter(structure);
256 initializeType();
257 }
258
259 private void initGetterSetter(final Class<?> structure) {
260 final int slot = getSlot();
261 /*
262 * primitiveGetter and primitiveSetter are only used in dual fields mode. Setting them to null also
263 * works in dual field mode, it only means that the property never has a primitive
264 * representation.
265 */
266
267 if (isParameter() && hasArguments()) {
268 //parameters are always stored in an object array, which may or may not be a good idea
269 final MethodHandle arguments = MH.getter(LOOKUP, structure, "arguments", ScriptObject.class);
270 objectGetter = MH.asType(MH.insertArguments(MH.filterArguments(ScriptObject.GET_ARGUMENT.methodHandle(), 0, arguments), 1, slot), Lookup.GET_OBJECT_TYPE);
271 objectSetter = MH.asType(MH.insertArguments(MH.filterArguments(ScriptObject.SET_ARGUMENT.methodHandle(), 0, arguments), 1, slot), Lookup.SET_OBJECT_TYPE);
272 primitiveGetter = null;
273 primitiveSetter = null;
274 } else {
275 final Accessors gs = GETTERS_SETTERS.get(structure);
276 objectGetter = gs.objectGetters[slot];
277 primitiveGetter = gs.primitiveGetters[slot];
278 objectSetter = gs.objectSetters[slot];
279 primitiveSetter = gs.primitiveSetters[slot];
280 }
281
282 // Always use dual fields except for single field structures
283 assert hasDualFields() != StructureLoader.isSingleFieldStructure(structure.getName());
284 }
285
286 /**
287 * Constructor
288 *
289 * @param key key
290 * @param flags flags
291 * @param slot field slot index
292 * @param owner owner of property
293 * @param initialValue initial value to which the property can be set
294 */
295 protected AccessorProperty(final Object key, final int flags, final int slot, final ScriptObject owner, final Object initialValue) {
296 this(key, flags, owner.getClass(), slot);
297 setInitialValue(owner, initialValue);
298 }
299
300 /**
301 * Normal access property constructor that overrides the type
302 * Override the initial type. Used for Object Literals
303 *
304 * @param key key
305 * @param flags flags
306 * @param structure structure to JO subclass
307 * @param slot field slot index
308 * @param initialType initial type of the property
309 */
310 public AccessorProperty(final Object key, final int flags, final Class<?> structure, final int slot, final Class<?> initialType) {
311 this(key, flags, structure, slot);
312 setType(hasDualFields() ? initialType : Object.class);
313 }
314
315 /**
316 * Copy constructor that may change type and in that case clear the cache. Important to do that before
317 * type change or getters will be created already stale.
318 *
319 * @param property property
320 * @param newType new type
321 */
322 protected AccessorProperty(final AccessorProperty property, final Class<?> newType) {
323 super(property, property.getFlags());
324
325 this.GETTER_CACHE = newType != property.getLocalType() ? new MethodHandle[NOOF_TYPES] : property.GETTER_CACHE;
326 this.primitiveGetter = property.primitiveGetter;
327 this.primitiveSetter = property.primitiveSetter;
328 this.objectGetter = property.objectGetter;
329 this.objectSetter = property.objectSetter;
330
331 setType(newType);
332 }
333
334 /**
335 * COPY constructor
336 *
337 * @param property source property
338 */
339 protected AccessorProperty(final AccessorProperty property) {
340 this(property, property.getLocalType());
341 }
342
343 /**
344 * Set initial value of a script object's property
345 * @param owner owner
346 * @param initialValue initial value
347 */
348 protected final void setInitialValue(final ScriptObject owner, final Object initialValue) {
349 setType(hasDualFields() ? JSType.unboxedFieldType(initialValue) : Object.class);
350 if (initialValue instanceof Integer) {
351 invokeSetter(owner, ((Integer)initialValue).intValue());
352 } else if (initialValue instanceof Double) {
353 invokeSetter(owner, ((Double)initialValue).doubleValue());
354 } else {
355 invokeSetter(owner, initialValue);
356 }
357 }
358
359 /**
360 * Initialize the type of a property
361 */
362 protected final void initializeType() {
363 setType(!hasDualFields() ? Object.class : null);
364 }
365
366 private void readObject(final ObjectInputStream s) throws IOException, ClassNotFoundException {
367 s.defaultReadObject();
368 // Restore getters array
369 GETTER_CACHE = new MethodHandle[NOOF_TYPES];
370 }
371
372 private static MethodHandle bindTo(final MethodHandle mh, final Object receiver) {
373 if (mh == null) {
374 return null;
375 }
376
377 return MH.dropArguments(MH.bindTo(mh, receiver), 0, Object.class);
378 }
379
380 @Override
381 public Property copy() {
382 return new AccessorProperty(this);
383 }
384
385 @Override
386 public Property copy(final Class<?> newType) {
387 return new AccessorProperty(this, newType);
388 }
389
390 @Override
391 public int getIntValue(final ScriptObject self, final ScriptObject owner) {
392 try {
393 return (int)getGetter(int.class).invokeExact((Object)self);
394 } catch (final Error | RuntimeException e) {
395 throw e;
396 } catch (final Throwable e) {
397 throw new RuntimeException(e);
398 }
399 }
400
401 @Override
402 public double getDoubleValue(final ScriptObject self, final ScriptObject owner) {
403 try {
404 return (double)getGetter(double.class).invokeExact((Object)self);
405 } catch (final Error | RuntimeException e) {
406 throw e;
407 } catch (final Throwable e) {
408 throw new RuntimeException(e);
409 }
410 }
411
412 @Override
413 public Object getObjectValue(final ScriptObject self, final ScriptObject owner) {
414 try {
415 return getGetter(Object.class).invokeExact((Object)self);
416 } catch (final Error | RuntimeException e) {
417 throw e;
418 } catch (final Throwable e) {
419 throw new RuntimeException(e);
420 }
421 }
422
423 /**
424 * Invoke setter for this property with a value
425 * @param self owner
426 * @param value value
427 */
428 protected final void invokeSetter(final ScriptObject self, final int value) {
429 try {
430 getSetter(int.class, self.getMap()).invokeExact((Object)self, value);
431 } catch (final Error | RuntimeException e) {
432 throw e;
433 } catch (final Throwable e) {
434 throw new RuntimeException(e);
435 }
436 }
437
438 /**
439 * Invoke setter for this property with a value
440 * @param self owner
441 * @param value value
442 */
443 protected final void invokeSetter(final ScriptObject self, final double value) {
444 try {
445 getSetter(double.class, self.getMap()).invokeExact((Object)self, value);
446 } catch (final Error | RuntimeException e) {
447 throw e;
448 } catch (final Throwable e) {
449 throw new RuntimeException(e);
450 }
451 }
452
453 /**
454 * Invoke setter for this property with a value
455 * @param self owner
456 * @param value value
457 */
458 protected final void invokeSetter(final ScriptObject self, final Object value) {
459 try {
460 getSetter(Object.class, self.getMap()).invokeExact((Object)self, value);
461 } catch (final Error | RuntimeException e) {
462 throw e;
463 } catch (final Throwable e) {
464 throw new RuntimeException(e);
465 }
466 }
467
468 @Override
469 public void setValue(final ScriptObject self, final ScriptObject owner, final int value, final boolean strict) {
470 assert isConfigurable() || isWritable() : getKey() + " is not writable or configurable";
471 invokeSetter(self, value);
472 }
473
474 @Override
475 public void setValue(final ScriptObject self, final ScriptObject owner, final double value, final boolean strict) {
476 assert isConfigurable() || isWritable() : getKey() + " is not writable or configurable";
477 invokeSetter(self, value);
478 }
479
480 @Override
481 public void setValue(final ScriptObject self, final ScriptObject owner, final Object value, final boolean strict) {
482 //this is sometimes used for bootstrapping, hence no assert. ugly.
483 invokeSetter(self, value);
484 }
485
486 @Override
487 void initMethodHandles(final Class<?> structure) {
488 // sanity check for structure class
489 if (!ScriptObject.class.isAssignableFrom(structure) || !StructureLoader.isStructureClass(structure.getName())) {
490 throw new IllegalArgumentException();
491 }
492 // this method is overridden in SpillProperty
493 assert !isSpill();
494 initGetterSetter(structure);
495 }
496
497 @Override
498 public MethodHandle getGetter(final Class<?> type) {
499 final int i = getAccessorTypeIndex(type);
500
501 assert type == int.class ||
502 type == double.class ||
503 type == Object.class :
504 "invalid getter type " + type + " for " + getKey();
505
506 checkUndeclared();
507
508 //all this does is add a return value filter for object fields only
509 final MethodHandle[] getterCache = GETTER_CACHE;
510 final MethodHandle cachedGetter = getterCache[i];
511 final MethodHandle getter;
512 if (cachedGetter != null) {
513 getter = cachedGetter;
514 } else {
515 getter = debug(
516 createGetter(
517 getLocalType(),
518 type,
519 primitiveGetter,
520 objectGetter,
521 INVALID_PROGRAM_POINT),
522 getLocalType(),
523 type,
524 "get");
525 getterCache[i] = getter;
526 }
527 assert getter.type().returnType() == type && getter.type().parameterType(0) == Object.class;
528 return getter;
529 }
530
531 @Override
532 public MethodHandle getOptimisticGetter(final Class<?> type, final int programPoint) {
533 // nasgen generated primitive fields like Math.PI have only one known unchangeable primitive type
534 if (objectGetter == null) {
535 return getOptimisticPrimitiveGetter(type, programPoint);
536 }
537
538 checkUndeclared();
539
540 return debug(
541 createGetter(
542 getLocalType(),
543 type,
544 primitiveGetter,
545 objectGetter,
546 programPoint),
547 getLocalType(),
548 type,
549 "get");
550 }
551
552 private MethodHandle getOptimisticPrimitiveGetter(final Class<?> type, final int programPoint) {
553 final MethodHandle g = getGetter(getLocalType());
554 return MH.asType(OptimisticReturnFilters.filterOptimisticReturnValue(g, type, programPoint), g.type().changeReturnType(type));
555 }
556
557 private Property getWiderProperty(final Class<?> type) {
558 return copy(type); //invalidate cache of new property
559 }
560
561 private PropertyMap getWiderMap(final PropertyMap oldMap, final Property newProperty) {
562 final PropertyMap newMap = oldMap.replaceProperty(this, newProperty);
563 assert oldMap.size() > 0;
564 assert newMap.size() == oldMap.size();
565 return newMap;
566 }
567
568 private void checkUndeclared() {
569 if ((getFlags() & NEEDS_DECLARATION) != 0) {
570 // a lexically defined variable that hasn't seen its declaration - throw ReferenceError
571 throw ECMAErrors.referenceError("not.defined", getKey().toString());
572 }
573 }
574
575 // the final three arguments are for debug printout purposes only
576 @SuppressWarnings("unused")
577 private static Object replaceMap(final Object sobj, final PropertyMap newMap) {
578 ((ScriptObject)sobj).setMap(newMap);
579 return sobj;
580 }
581
582 @SuppressWarnings("unused")
583 private static Object invalidateSwitchPoint(final AccessorProperty property, final Object obj) {
584 if (!property.builtinSwitchPoint.hasBeenInvalidated()) {
585 SwitchPoint.invalidateAll(new SwitchPoint[] { property.builtinSwitchPoint });
586 }
587 return obj;
588 }
589
590 private MethodHandle generateSetter(final Class<?> forType, final Class<?> type) {
591 return debug(createSetter(forType, type, primitiveSetter, objectSetter), getLocalType(), type, "set");
592 }
593
594 /**
595 * Is this property of the undefined type?
596 * @return true if undefined
597 */
598 protected final boolean isUndefined() {
599 return getLocalType() == null;
600 }
601
602 @Override
603 public boolean hasNativeSetter() {
604 return objectSetter != null;
605 }
606
607 @Override
608 public MethodHandle getSetter(final Class<?> type, final PropertyMap currentMap) {
609 checkUndeclared();
610
611 final int typeIndex = getAccessorTypeIndex(type);
612 final int currentTypeIndex = getAccessorTypeIndex(getLocalType());
613
614 //if we are asking for an object setter, but are still a primitive type, we might try to box it
615 MethodHandle mh;
616 if (needsInvalidator(typeIndex, currentTypeIndex)) {
617 final Property newProperty = getWiderProperty(type);
618 final PropertyMap newMap = getWiderMap(currentMap, newProperty);
619
620 final MethodHandle widerSetter = newProperty.getSetter(type, newMap);
621 final Class<?> ct = getLocalType();
622 mh = MH.filterArguments(widerSetter, 0, MH.insertArguments(debugReplace(ct, type, currentMap, newMap) , 1, newMap));
623 if (ct != null && ct.isPrimitive() && !type.isPrimitive()) {
624 mh = ObjectClassGenerator.createGuardBoxedPrimitiveSetter(ct, generateSetter(ct, ct), mh);
625 }
626 } else {
627 final Class<?> forType = isUndefined() ? type : getLocalType();
628 mh = generateSetter(!forType.isPrimitive() ? Object.class : forType, type);
629 }
630
631 if (isBuiltin()) {
632 mh = MH.filterArguments(mh, 0, debugInvalidate(MH.insertArguments(INVALIDATE_SP, 0, this), getKey().toString()));
633 }
634
635 assert mh.type().returnType() == void.class : mh.type();
636
637 return mh;
638 }
639
640 @Override
641 public final boolean canChangeType() {
642 if (!hasDualFields()) {
643 return false;
644 }
645 // Return true for currently undefined even if non-writable/configurable to allow initialization of ES6 CONST.
646 return getLocalType() == null || (getLocalType() != Object.class && (isConfigurable() || isWritable()));
647 }
648
649 private boolean needsInvalidator(final int typeIndex, final int currentTypeIndex) {
650 return canChangeType() && typeIndex > currentTypeIndex;
651 }
652
653 private MethodHandle debug(final MethodHandle mh, final Class<?> forType, final Class<?> type, final String tag) {
654 if (!Context.DEBUG || !Global.hasInstance()) {
655 return mh;
656 }
657
658 final Context context = Context.getContextTrusted();
659 assert context != null;
660
661 return context.addLoggingToHandle(
662 ObjectClassGenerator.class,
663 Level.INFO,
664 mh,
665 0,
666 true,
667 new Supplier<String>() {
668 @Override
669 public String get() {
670 return tag + " '" + getKey() + "' (property="+ Debug.id(this) + ", slot=" + getSlot() + " " + getClass().getSimpleName() + " forType=" + stripName(forType) + ", type=" + stripName(type) + ')';
671 }
672 });
673 }
674
675 private MethodHandle debugReplace(final Class<?> oldType, final Class<?> newType, final PropertyMap oldMap, final PropertyMap newMap) {
676 if (!Context.DEBUG || !Global.hasInstance()) {
677 return REPLACE_MAP;
678 }
679
680 final Context context = Context.getContextTrusted();
681 assert context != null;
682
683 MethodHandle mh = context.addLoggingToHandle(
684 ObjectClassGenerator.class,
685 REPLACE_MAP,
686 new Supplier<String>() {
687 @Override
688 public String get() {
689 return "Type change for '" + getKey() + "' " + oldType + "=>" + newType;
690 }
691 });
692
693 mh = context.addLoggingToHandle(
694 ObjectClassGenerator.class,
695 Level.FINEST,
696 mh,
697 Integer.MAX_VALUE,
698 false,
699 new Supplier<String>() {
700 @Override
701 public String get() {
702 return "Setting map " + Debug.id(oldMap) + " => " + Debug.id(newMap) + " " + oldMap + " => " + newMap;
703 }
704 });
705 return mh;
706 }
707
708 private static MethodHandle debugInvalidate(final MethodHandle invalidator, final String key) {
709 if (!Context.DEBUG || !Global.hasInstance()) {
710 return invalidator;
711 }
712
713 final Context context = Context.getContextTrusted();
714 assert context != null;
715
716 return context.addLoggingToHandle(
717 ObjectClassGenerator.class,
718 invalidator,
719 new Supplier<String>() {
720 @Override
721 public String get() {
722 return "Field change callback for " + key + " triggered ";
723 }
724 });
725 }
726
727 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
728 return MH.findStatic(LOOKUP, AccessorProperty.class, name, MH.type(rtype, types));
729 }
730 }