valueIterator() {
- return new ValueIterator(this);
- }
-
- /**
- * ECMA 8.10.1 IsAccessorDescriptor ( Desc )
- * @return true if this has a {@link AccessorPropertyDescriptor} with a getter or a setter
- */
- public final boolean isAccessorDescriptor() {
- return has(GET) || has(SET);
- }
-
- /**
- * ECMA 8.10.2 IsDataDescriptor ( Desc )
- * @return true if this has a {@link DataPropertyDescriptor}, i.e. the object has a property value and is writable
- */
- public final boolean isDataDescriptor() {
- return has(VALUE) || has(WRITABLE);
- }
-
- /**
- * ECMA 8.10.5 ToPropertyDescriptor ( Obj )
- *
- * @return property descriptor
- */
- public final PropertyDescriptor toPropertyDescriptor() {
- final Global global = Context.getGlobal();
-
- final PropertyDescriptor desc;
- if (isDataDescriptor()) {
- if (has(SET) || has(GET)) {
- throw typeError(global, "inconsistent.property.descriptor");
- }
-
- desc = global.newDataDescriptor(UNDEFINED, false, false, false);
- } else if (isAccessorDescriptor()) {
- if (has(VALUE) || has(WRITABLE)) {
- throw typeError(global, "inconsistent.property.descriptor");
- }
-
- desc = global.newAccessorDescriptor(UNDEFINED, UNDEFINED, false, false);
- } else {
- desc = global.newGenericDescriptor(false, false);
- }
-
- return desc.fillFrom(this);
- }
-
- /**
- * ECMA 8.10.5 ToPropertyDescriptor ( Obj )
- *
- * @param global global scope object
- * @param obj object to create property descriptor from
- *
- * @return property descriptor
- */
- public static PropertyDescriptor toPropertyDescriptor(final Global global, final Object obj) {
- if (obj instanceof ScriptObject) {
- return ((ScriptObject)obj).toPropertyDescriptor();
- }
-
- throw typeError(global, "not.an.object", ScriptRuntime.safeToString(obj));
- }
-
- /**
- * ECMA 8.12.1 [[GetOwnProperty]] (P)
- *
- * @param key property key
- *
- * @return Returns the Property Descriptor of the named own property of this
- * object, or undefined if absent.
- */
- public Object getOwnPropertyDescriptor(final Object key) {
- final Property property = getMap().findProperty(key);
-
- final Global global = Context.getGlobal();
-
- if (property != null) {
- final ScriptFunction get = property.getGetterFunction(this);
- final ScriptFunction set = property.getSetterFunction(this);
-
- final boolean configurable = property.isConfigurable();
- final boolean enumerable = property.isEnumerable();
- final boolean writable = property.isWritable();
-
- if (property.isAccessorProperty()) {
- return global.newAccessorDescriptor(
- get != null ?
- get :
- UNDEFINED,
- set != null ?
- set :
- UNDEFINED,
- configurable,
- enumerable);
- }
-
- return global.newDataDescriptor(getWithProperty(property), configurable, enumerable, writable);
- }
-
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return array.getDescriptor(global, index);
- }
-
- return UNDEFINED;
- }
-
- /**
- * ECMA 8.12.2 [[GetProperty]] (P)
- *
- * @param key property key
- *
- * @return Returns the fully populated Property Descriptor of the named property
- * of this object, or undefined if absent.
- */
- public Object getPropertyDescriptor(final String key) {
- final Object res = getOwnPropertyDescriptor(key);
-
- if (res != UNDEFINED) {
- return res;
- } else if (getProto() != null) {
- return getProto().getOwnPropertyDescriptor(key);
- } else {
- return UNDEFINED;
- }
- }
-
- /**
- * Invalidate any existing global constant method handles that may exist for {@code key}.
- * @param key the property name
- */
- protected void invalidateGlobalConstant(final Object key) {
- final GlobalConstants globalConstants = getGlobalConstants();
- if (globalConstants != null) {
- globalConstants.delete(key);
- }
- }
-
- /**
- * ECMA 8.12.9 [[DefineOwnProperty]] (P, Desc, Throw)
- *
- * @param key the property key
- * @param propertyDesc the property descriptor
- * @param reject is the property extensible - true means new definitions are rejected
- *
- * @return true if property was successfully defined
- */
- public boolean defineOwnProperty(final Object key, final Object propertyDesc, final boolean reject) {
- final Global global = Context.getGlobal();
- final PropertyDescriptor desc = toPropertyDescriptor(global, propertyDesc);
- final Object current = getOwnPropertyDescriptor(key);
-
- invalidateGlobalConstant(key);
-
- if (current == UNDEFINED) {
- if (isExtensible()) {
- // add a new own property
- addOwnProperty(key, desc);
- return true;
- }
- // new property added to non-extensible object
- if (reject) {
- throw typeError(global, "object.non.extensible", key.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
-
- // modifying an existing property
- final PropertyDescriptor currentDesc = (PropertyDescriptor)current;
- final PropertyDescriptor newDesc = desc;
-
- if (newDesc.type() == PropertyDescriptor.GENERIC && !newDesc.has(CONFIGURABLE) && !newDesc.has(ENUMERABLE)) {
- // every descriptor field is absent
- return true;
- }
-
- if (newDesc.hasAndEquals(currentDesc)) {
- // every descriptor field of the new is same as the current
- return true;
- }
-
- if (!currentDesc.isConfigurable()) {
- if (newDesc.has(CONFIGURABLE) && newDesc.isConfigurable()) {
- // not configurable can not be made configurable
- if (reject) {
- throw typeError(global, "cant.redefine.property", key.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
-
- if (newDesc.has(ENUMERABLE) &&
- currentDesc.isEnumerable() != newDesc.isEnumerable()) {
- // cannot make non-enumerable as enumerable or vice-versa
- if (reject) {
- throw typeError(global, "cant.redefine.property", key.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
- }
-
- int propFlags = Property.mergeFlags(currentDesc, newDesc);
- Property property = getMap().findProperty(key);
-
- if (currentDesc.type() == PropertyDescriptor.DATA &&
- (newDesc.type() == PropertyDescriptor.DATA ||
- newDesc.type() == PropertyDescriptor.GENERIC)) {
- if (!currentDesc.isConfigurable() && !currentDesc.isWritable()) {
- if (newDesc.has(WRITABLE) && newDesc.isWritable() ||
- newDesc.has(VALUE) && !ScriptRuntime.sameValue(currentDesc.getValue(), newDesc.getValue())) {
- if (reject) {
- throw typeError(global, "cant.redefine.property", key.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
- }
-
- final boolean newValue = newDesc.has(VALUE);
- final Object value = newValue ? newDesc.getValue() : currentDesc.getValue();
-
- if (newValue && property != null) {
- // Temporarily clear flags.
- property = modifyOwnProperty(property, 0);
- set(key, value, 0);
- //this might change the map if we change types of the property
- //hence we need to read it again. note that we should probably
- //have the setter return the new property throughout and in
- //general respect Property return values from modify and add
- //functions - which we don't seem to do at all here :-(
- //There is already a bug filed to generify PropertyAccess so we
- //can have the setter return e.g. a Property
- property = getMap().findProperty(key);
- }
-
- if (property == null) {
- // promoting an arrayData value to actual property
- addOwnProperty(key, propFlags, value);
- checkIntegerKey(key);
- } else {
- // Now set the new flags
- modifyOwnProperty(property, propFlags);
- }
- } else if (currentDesc.type() == PropertyDescriptor.ACCESSOR &&
- (newDesc.type() == PropertyDescriptor.ACCESSOR ||
- newDesc.type() == PropertyDescriptor.GENERIC)) {
- if (!currentDesc.isConfigurable()) {
- if (newDesc.has(PropertyDescriptor.GET) && !ScriptRuntime.sameValue(currentDesc.getGetter(), newDesc.getGetter()) ||
- newDesc.has(PropertyDescriptor.SET) && !ScriptRuntime.sameValue(currentDesc.getSetter(), newDesc.getSetter())) {
- if (reject) {
- throw typeError(global, "cant.redefine.property", key.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
- }
- // New set the new features.
- modifyOwnProperty(property, propFlags,
- newDesc.has(GET) ? newDesc.getGetter() : currentDesc.getGetter(),
- newDesc.has(SET) ? newDesc.getSetter() : currentDesc.getSetter());
- } else {
- // changing descriptor type
- if (!currentDesc.isConfigurable()) {
- // not configurable can not be made configurable
- if (reject) {
- throw typeError(global, "cant.redefine.property", key.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
-
- propFlags = 0;
-
- // Preserve only configurable and enumerable from current desc
- // if those are not overridden in the new property descriptor.
- boolean value = newDesc.has(CONFIGURABLE) ? newDesc.isConfigurable() : currentDesc.isConfigurable();
- if (!value) {
- propFlags |= Property.NOT_CONFIGURABLE;
- }
- value = newDesc.has(ENUMERABLE)? newDesc.isEnumerable() : currentDesc.isEnumerable();
- if (!value) {
- propFlags |= Property.NOT_ENUMERABLE;
- }
-
- final int type = newDesc.type();
- if (type == PropertyDescriptor.DATA) {
- // get writable from the new descriptor
- value = newDesc.has(WRITABLE) && newDesc.isWritable();
- if (!value) {
- propFlags |= Property.NOT_WRITABLE;
- }
-
- // delete the old property
- deleteOwnProperty(property);
- // add new data property
- addOwnProperty(key, propFlags, newDesc.getValue());
- } else if (type == PropertyDescriptor.ACCESSOR) {
- if (property == null) {
- addOwnProperty(key, propFlags,
- newDesc.has(GET) ? newDesc.getGetter() : null,
- newDesc.has(SET) ? newDesc.getSetter() : null);
- } else {
- // Modify old property with the new features.
- modifyOwnProperty(property, propFlags,
- newDesc.has(GET) ? newDesc.getGetter() : null,
- newDesc.has(SET) ? newDesc.getSetter() : null);
- }
- }
- }
-
- checkIntegerKey(key);
-
- return true;
- }
-
- /**
- * Almost like defineOwnProperty(int,Object) for arrays this one does
- * not add 'gap' elements (like the array one does).
- *
- * @param index key for property
- * @param value value to define
- */
- public void defineOwnProperty(final int index, final Object value) {
- assert isValidArrayIndex(index) : "invalid array index";
- final long longIndex = ArrayIndex.toLongIndex(index);
- final long oldLength = getArray().length();
- if (longIndex >= oldLength) {
- setArray(getArray().ensure(longIndex).safeDelete(oldLength, longIndex - 1, false));
- }
- setArray(getArray().set(index, value, false));
- }
-
- private void checkIntegerKey(final Object key) {
- final int index = getArrayIndex(key);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
-
- if (data.has(index)) {
- setArray(data.delete(index));
- }
- }
- }
-
- /**
- * Add a new property to the object.
- *
- * @param key property key
- * @param propertyDesc property descriptor for property
- */
- public final void addOwnProperty(final Object key, final PropertyDescriptor propertyDesc) {
- // Already checked that there is no own property with that key.
- PropertyDescriptor pdesc = propertyDesc;
-
- final int propFlags = Property.toFlags(pdesc);
-
- if (pdesc.type() == PropertyDescriptor.GENERIC) {
- final Global global = Context.getGlobal();
- final PropertyDescriptor dDesc = global.newDataDescriptor(UNDEFINED, false, false, false);
-
- dDesc.fillFrom((ScriptObject)pdesc);
- pdesc = dDesc;
- }
-
- final int type = pdesc.type();
- if (type == PropertyDescriptor.DATA) {
- addOwnProperty(key, propFlags, pdesc.getValue());
- } else if (type == PropertyDescriptor.ACCESSOR) {
- addOwnProperty(key, propFlags,
- pdesc.has(GET) ? pdesc.getGetter() : null,
- pdesc.has(SET) ? pdesc.getSetter() : null);
- }
-
- checkIntegerKey(key);
- }
-
- /**
- * Low level property API (not using property descriptors)
- *
- * Find a property in the prototype hierarchy. Note: this is final and not
- * a good idea to override. If you have to, use
- * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or
- * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the
- * overriding way to find array properties
- *
- * @see jdk.nashorn.internal.objects.NativeArray
- *
- * @param key Property key.
- * @param deep Whether the search should look up proto chain.
- *
- * @return FindPropertyData or null if not found.
- */
- public final FindProperty findProperty(final Object key, final boolean deep) {
- return findProperty(key, deep, false, this);
- }
-
- /**
- * Low level property API (not using property descriptors)
- *
- * Find a property in the prototype hierarchy. Note: this is not a good idea
- * to override except as it was done in {@link WithObject}.
- * If you have to, use
- * {jdk.nashorn.internal.objects.NativeArray{@link #getProperty(String)} or
- * {jdk.nashorn.internal.objects.NativeArray{@link #getPropertyDescriptor(String)} as the
- * overriding way to find array properties
- *
- * @see jdk.nashorn.internal.objects.NativeArray
- *
- * @param key Property key.
- * @param deep true if the search should look up proto chain
- * @param isScope true if this is a scope access
- * @param start the object on which the lookup was originally initiated
- * @return FindPropertyData or null if not found.
- */
- protected FindProperty findProperty(final Object key, final boolean deep, final boolean isScope, final ScriptObject start) {
-
- final PropertyMap selfMap = getMap();
- final Property property = selfMap.findProperty(key);
-
- if (property != null) {
- return new FindProperty(start, this, property);
- }
-
- if (deep) {
- final ScriptObject myProto = getProto();
- final FindProperty find = myProto == null ? null : myProto.findProperty(key, true, isScope, start);
- // checkSharedProtoMap must be invoked after myProto.checkSharedProtoMap to propagate
- // shared proto invalidation up the prototype chain. It also must be invoked when prototype is null.
- checkSharedProtoMap();
- return find;
- }
-
- return null;
- }
-
- /**
- * Low level property API. This is similar to {@link #findProperty(Object, boolean)} but returns a
- * {@code boolean} value instead of a {@link FindProperty} object.
- * @param key Property key.
- * @param deep Whether the search should look up proto chain.
- * @return true if the property was found.
- */
- boolean hasProperty(final Object key, final boolean deep) {
- if (getMap().findProperty(key) != null) {
- return true;
- }
-
- if (deep) {
- final ScriptObject myProto = getProto();
- if (myProto != null) {
- return myProto.hasProperty(key, true);
- }
- }
-
- return false;
- }
-
- private SwitchPoint findBuiltinSwitchPoint(final Object key) {
- for (ScriptObject myProto = getProto(); myProto != null; myProto = myProto.getProto()) {
- final Property prop = myProto.getMap().findProperty(key);
- if (prop != null) {
- final SwitchPoint sp = prop.getBuiltinSwitchPoint();
- if (sp != null && !sp.hasBeenInvalidated()) {
- return sp;
- }
- }
- }
- return null;
- }
-
- /**
- * Add a new property to the object.
- *
- * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
- *
- * @param key Property key.
- * @param propertyFlags Property flags.
- * @param getter Property getter, or null if not defined
- * @param setter Property setter, or null if not defined
- *
- * @return New property.
- */
- public final Property addOwnProperty(final Object key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
- return addOwnProperty(newUserAccessors(key, propertyFlags, getter, setter));
- }
-
- /**
- * Add a new property to the object.
- *
- * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
- *
- * @param key Property key.
- * @param propertyFlags Property flags.
- * @param value Value of property
- *
- * @return New property.
- */
- public final Property addOwnProperty(final Object key, final int propertyFlags, final Object value) {
- return addSpillProperty(key, propertyFlags, value, true);
- }
-
- /**
- * Add a new property to the object.
- *
- * This a more "low level" way that doesn't involve {@link PropertyDescriptor}s
- *
- * @param newProperty property to add
- *
- * @return New property.
- */
- public final Property addOwnProperty(final Property newProperty) {
- PropertyMap oldMap = getMap();
- while (true) {
- final PropertyMap newMap = oldMap.addProperty(newProperty);
- if (!compareAndSetMap(oldMap, newMap)) {
- oldMap = getMap();
- final Property oldProperty = oldMap.findProperty(newProperty.getKey());
-
- if (oldProperty != null) {
- return oldProperty;
- }
- } else {
- return newProperty;
- }
- }
- }
-
- private void erasePropertyValue(final Property property) {
- // Erase the property field value with undefined. If the property is an accessor property
- // we don't want to call the setter!!
- if (property != null && !property.isAccessorProperty()) {
- property.setValue(this, this, UNDEFINED, false);
- }
- }
-
- /**
- * Delete a property from the object.
- *
- * @param property Property to delete.
- *
- * @return true if deleted.
- */
- public final boolean deleteOwnProperty(final Property property) {
- erasePropertyValue(property);
- PropertyMap oldMap = getMap();
-
- while (true) {
- final PropertyMap newMap = oldMap.deleteProperty(property);
-
- if (newMap == null) {
- return false;
- }
-
- if (!compareAndSetMap(oldMap, newMap)) {
- oldMap = getMap();
- } else {
- // delete getter and setter function references so that we don't leak
- if (property instanceof UserAccessorProperty) {
- ((UserAccessorProperty)property).setAccessors(this, getMap(), null);
- }
-
- invalidateGlobalConstant(property.getKey());
- return true;
- }
- }
-
- }
-
- /**
- * Fast initialization functions for ScriptFunctions that are strict, to avoid
- * creating setters that probably aren't used. Inject directly into the spill pool
- * the defaults for "arguments" and "caller", asserting the property is already
- * defined in the map.
- *
- * @param key property key
- * @param getter getter for {@link UserAccessorProperty}
- * @param setter setter for {@link UserAccessorProperty}
- */
- protected final void initUserAccessors(final String key, final ScriptFunction getter, final ScriptFunction setter) {
- final PropertyMap map = getMap();
- final Property property = map.findProperty(key);
- assert property instanceof UserAccessorProperty;
- ensureSpillSize(property.getSlot());
- objectSpill[property.getSlot()] = new UserAccessorProperty.Accessors(getter, setter);
- }
-
- /**
- * Modify a property in the object
- *
- * @param oldProperty property to modify
- * @param propertyFlags new property flags
- * @param getter getter for {@link UserAccessorProperty}, null if not present or N/A
- * @param setter setter for {@link UserAccessorProperty}, null if not present or N/A
- *
- * @return new property
- */
- public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
- Property newProperty;
-
- if (oldProperty instanceof UserAccessorProperty) {
- final UserAccessorProperty uc = (UserAccessorProperty)oldProperty;
- final int slot = uc.getSlot();
-
- assert uc.getLocalType() == Object.class;
- final UserAccessorProperty.Accessors gs = uc.getAccessors(this); //this crashes
- assert gs != null;
- //reuse existing getter setter for speed
- gs.set(getter, setter);
- if (uc.getFlags() == (propertyFlags | Property.IS_ACCESSOR_PROPERTY)) {
- return oldProperty;
- }
- newProperty = new UserAccessorProperty(uc.getKey(), propertyFlags, slot);
- } else {
- // erase old property value and create new user accessor property
- erasePropertyValue(oldProperty);
- newProperty = newUserAccessors(oldProperty.getKey(), propertyFlags, getter, setter);
- }
-
- return modifyOwnProperty(oldProperty, newProperty);
- }
-
- /**
- * Modify a property in the object
- *
- * @param oldProperty property to modify
- * @param propertyFlags new property flags
- *
- * @return new property
- */
- public final Property modifyOwnProperty(final Property oldProperty, final int propertyFlags) {
- return modifyOwnProperty(oldProperty, oldProperty.setFlags(propertyFlags));
- }
-
- /**
- * Modify a property in the object, replacing a property with a new one
- *
- * @param oldProperty property to replace
- * @param newProperty property to replace it with
- *
- * @return new property
- */
- private Property modifyOwnProperty(final Property oldProperty, final Property newProperty) {
- if (oldProperty == newProperty) {
- return newProperty; //nop
- }
-
- assert newProperty.getKey().equals(oldProperty.getKey()) : "replacing property with different key";
-
- PropertyMap oldMap = getMap();
-
- while (true) {
- final PropertyMap newMap = oldMap.replaceProperty(oldProperty, newProperty);
-
- if (!compareAndSetMap(oldMap, newMap)) {
- oldMap = getMap();
- final Property oldPropertyLookup = oldMap.findProperty(oldProperty.getKey());
-
- if (oldPropertyLookup != null && oldPropertyLookup.equals(newProperty)) {
- return oldPropertyLookup;
- }
- } else {
- return newProperty;
- }
- }
- }
-
- /**
- * Update getter and setter in an object literal.
- *
- * @param key Property key.
- * @param getter {@link UserAccessorProperty} defined getter, or null if none
- * @param setter {@link UserAccessorProperty} defined setter, or null if none
- */
- public final void setUserAccessors(final Object key, final ScriptFunction getter, final ScriptFunction setter) {
- final Object realKey = JSType.toPropertyKey(key);
- final Property oldProperty = getMap().findProperty(realKey);
- if (oldProperty instanceof UserAccessorProperty) {
- modifyOwnProperty(oldProperty, oldProperty.getFlags(), getter, setter);
- } else {
- addOwnProperty(newUserAccessors(realKey, oldProperty != null ? oldProperty.getFlags() : 0, getter, setter));
- }
- }
-
- private static int getIntValue(final FindProperty find, final int programPoint) {
- final MethodHandle getter = find.getGetter(int.class, programPoint, null);
- if (getter != null) {
- try {
- return (int)getter.invokeExact((Object)find.getGetterReceiver());
- } catch (final Error|RuntimeException e) {
- throw e;
- } catch (final Throwable e) {
- throw new RuntimeException(e);
- }
- }
-
- return UNDEFINED_INT;
- }
-
- private static double getDoubleValue(final FindProperty find, final int programPoint) {
- final MethodHandle getter = find.getGetter(double.class, programPoint, null);
- if (getter != null) {
- try {
- return (double)getter.invokeExact((Object)find.getGetterReceiver());
- } catch (final Error|RuntimeException e) {
- throw e;
- } catch (final Throwable e) {
- throw new RuntimeException(e);
- }
- }
-
- return UNDEFINED_DOUBLE;
- }
-
- /**
- * Return methodHandle of value function for call.
- *
- * @param find data from find property.
- * @param type method type of function.
- * @param bindName null or name to bind to second argument (property not found method.)
- *
- * @return value of property as a MethodHandle or null.
- */
- protected static MethodHandle getCallMethodHandle(final FindProperty find, final MethodType type, final String bindName) {
- return getCallMethodHandle(find.getObjectValue(), type, bindName);
- }
-
- /**
- * Return methodHandle of value function for call.
- *
- * @param value value of receiver, it not a {@link ScriptFunction} this will return null.
- * @param type method type of function.
- * @param bindName null or name to bind to second argument (property not found method.)
- *
- * @return value of property as a MethodHandle or null.
- */
- private static MethodHandle getCallMethodHandle(final Object value, final MethodType type, final String bindName) {
- return value instanceof ScriptFunction ? ((ScriptFunction)value).getCallMethodHandle(type, bindName) : null;
- }
-
- /**
- * Get value using found property.
- *
- * @param property Found property.
- *
- * @return Value of property.
- */
- public final Object getWithProperty(final Property property) {
- return new FindProperty(this, this, property).getObjectValue();
- }
-
- /**
- * Get a property given a key
- *
- * @param key property key
- *
- * @return property for key
- */
- public final Property getProperty(final String key) {
- return getMap().findProperty(key);
- }
-
- /**
- * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.)
- * Used for argument access in a vararg function using parameter name.
- * Returns the argument at a given key (index)
- *
- * @param key argument index
- *
- * @return the argument at the given position, or undefined if not present
- */
- public Object getArgument(final int key) {
- return get(key);
- }
-
- /**
- * Overridden by {@link jdk.nashorn.internal.objects.NativeArguments} class (internal use.)
- * Used for argument access in a vararg function using parameter name.
- * Returns the argument at a given key (index)
- *
- * @param key argument index
- * @param value the value to write at the given index
- */
- public void setArgument(final int key, final Object value) {
- set(key, value, 0);
- }
-
- /**
- * Return the current context from the object's map.
- * @return Current context.
- */
- protected Context getContext() {
- return Context.fromClass(getClass());
- }
-
- /**
- * Return the map of an object.
- * @return PropertyMap object.
- */
- public final PropertyMap getMap() {
- return map;
- }
-
- /**
- * Set the initial map.
- * @param map Initial map.
- */
- public final void setMap(final PropertyMap map) {
- this.map = map;
- }
-
- /**
- * Conditionally set the new map if the old map is the same.
- * @param oldMap Map prior to manipulation.
- * @param newMap Replacement map.
- * @return true if the operation succeeded.
- */
- protected final boolean compareAndSetMap(final PropertyMap oldMap, final PropertyMap newMap) {
- if (oldMap == this.map) {
- this.map = newMap;
- return true;
- }
- return false;
- }
-
- /**
- * Return the __proto__ of an object.
- * @return __proto__ object.
- */
- public final ScriptObject getProto() {
- return proto;
- }
-
- /**
- * Get the proto of a specific depth
- * @param n depth
- * @return proto at given depth
- */
- public final ScriptObject getProto(final int n) {
- ScriptObject p = this;
- for (int i = n; i > 0; i--) {
- p = p.getProto();
- }
- return p;
- }
-
- /**
- * Set the __proto__ of an object.
- * @param newProto new __proto__ to set.
- */
- public final void setProto(final ScriptObject newProto) {
- final ScriptObject oldProto = proto;
-
- if (oldProto != newProto) {
- proto = newProto;
-
- // Let current listeners know that the prototype has changed
- getMap().protoChanged();
- // Replace our current allocator map with one that is associated with the new prototype.
- setMap(getMap().changeProto(newProto));
- }
- }
-
- /**
- * Set the initial __proto__ of this object. This should be used instead of
- * {@link #setProto} if it is known that the current property map will not be
- * used on a new object with any other parent property map, so we can pass over
- * property map invalidation/evolution.
- *
- * @param initialProto the initial __proto__ to set.
- */
- public void setInitialProto(final ScriptObject initialProto) {
- this.proto = initialProto;
- }
-
- /**
- * Invoked from generated bytecode to initialize the prototype of object literals to the global Object prototype.
- * @param obj the object literal that needs to have its prototype initialized to the global Object prototype.
- */
- public static void setGlobalObjectProto(final ScriptObject obj) {
- obj.setInitialProto(Global.objectPrototype());
- }
-
- /**
- * Set the __proto__ of an object with checks.
- * This is the built-in operation [[SetPrototypeOf]]
- * See ES6 draft spec: 9.1.2 [[SetPrototypeOf]] (V)
- *
- * @param newProto Prototype to set.
- */
- public final void setPrototypeOf(final Object newProto) {
- if (newProto == null || newProto instanceof ScriptObject) {
- if (! isExtensible()) {
- // okay to set same proto again - even if non-extensible
-
- if (newProto == getProto()) {
- return;
- }
- throw typeError("__proto__.set.non.extensible", ScriptRuntime.safeToString(this));
- }
-
- // check for circularity
- ScriptObject p = (ScriptObject)newProto;
- while (p != null) {
- if (p == this) {
- throw typeError("circular.__proto__.set", ScriptRuntime.safeToString(this));
- }
- p = p.getProto();
- }
- setProto((ScriptObject) newProto);
- } else {
- throw typeError("cant.set.proto.to.non.object", ScriptRuntime.safeToString(this), ScriptRuntime.safeToString(newProto));
- }
- }
-
- /**
- * Set the __proto__ of an object from an object literal.
- * See ES6 draft spec: B.3.1 __proto__ Property Names in
- * Object Initializers. Step 6 handling of "__proto__".
- *
- * @param newProto Prototype to set.
- */
- public final void setProtoFromLiteral(final Object newProto) {
- if (newProto == null || newProto instanceof ScriptObject) {
- setPrototypeOf(newProto);
- } else {
- // Some non-object, non-null. Then, we need to set
- // Object.prototype as the new __proto__
- //
- // var obj = { __proto__ : 34 };
- // print(obj.__proto__ === Object.prototype); // => true
- setPrototypeOf(Global.objectPrototype());
- }
- }
-
- /**
- * return an array of all property keys - all inherited, non-enumerable included.
- * This is meant for source code completion by interactive shells or editors.
- *
- * @return Array of keys, order of properties is undefined.
- */
- public String[] getAllKeys() {
- final Set keys = new HashSet<>();
- final Set nonEnumerable = new HashSet<>();
- for (ScriptObject self = this; self != null; self = self.getProto()) {
- keys.addAll(Arrays.asList(self.getOwnKeys(String.class, true, nonEnumerable)));
- }
- return keys.toArray(new String[0]);
- }
-
- /**
- * Return an array of own property keys associated with the object.
- *
- * @param all True if to include non-enumerable keys.
- * @return Array of keys.
- */
- public final String[] getOwnKeys(final boolean all) {
- return getOwnKeys(String.class, all, null);
- }
-
- /**
- * Return an array of own property keys associated with the object.
- *
- * @param all True if to include non-enumerable keys.
- * @return Array of keys.
- */
- public final Symbol[] getOwnSymbols(final boolean all) {
- return getOwnKeys(Symbol.class, all, null);
- }
-
- /**
- * return an array of own property keys associated with the object.
- *
- * @param the type returned keys.
- * @param type the type of keys to return, either {@code String.class} or {@code Symbol.class}.
- * @param all True if to include non-enumerable keys.
- * @param nonEnumerable set of non-enumerable properties seen already. Used to
- * filter out shadowed, but enumerable properties from proto children.
- * @return Array of keys.
- */
- @SuppressWarnings("unchecked")
- protected T[] getOwnKeys(final Class type, final boolean all, final Set nonEnumerable) {
- final List keys = new ArrayList<>();
- final PropertyMap selfMap = this.getMap();
-
- final ArrayData array = getArray();
-
- if (type == String.class) {
- for (final Iterator iter = array.indexIterator(); iter.hasNext(); ) {
- keys.add(JSType.toString(iter.next().longValue()));
- }
- }
-
- for (final Property property : selfMap.getProperties()) {
- final boolean enumerable = property.isEnumerable();
- final Object key = property.getKey();
- if (!type.isInstance(key)) {
- continue;
- }
- if (all) {
- keys.add(key);
- } else if (enumerable) {
- // either we don't have non-enumerable filter set or filter set
- // does not contain the current property.
- if (nonEnumerable == null || !nonEnumerable.contains(key)) {
- keys.add(key);
- }
- } else {
- // store this non-enumerable property for later proto walk
- if (nonEnumerable != null) {
- nonEnumerable.add((T) key);
- }
- }
- }
-
- return keys.toArray((T[]) Array.newInstance(type, keys.size()));
- }
-
- /**
- * Check if this ScriptObject has array entries. This means that someone has
- * set values with numeric keys in the object.
- *
- * @return true if array entries exists.
- */
- public boolean hasArrayEntries() {
- return getArray().length() > 0 || getMap().containsArrayKeys();
- }
-
- /**
- * Return the valid JavaScript type name descriptor
- *
- * @return "Object"
- */
- public String getClassName() {
- return "Object";
- }
-
- /**
- * {@code length} is a well known property. This is its getter.
- * Note that this *may* be optimized by other classes
- *
- * @return length property value for this ScriptObject
- */
- public Object getLength() {
- return get("length");
- }
-
- /**
- * Stateless toString for ScriptObjects.
- *
- * @return string description of this object, e.g. {@code [object Object]}
- */
- public String safeToString() {
- return "[object " + getClassName() + "]";
- }
-
- /**
- * Return the default value of the object with a given preferred type hint.
- * The preferred type hints are String.class for type String, Number.class
- * for type Number.
- *
- * A hint of null means "no hint".
- *
- * ECMA 8.12.8 [[DefaultValue]](hint)
- *
- * @param typeHint the preferred type hint
- * @return the default value
- */
- public Object getDefaultValue(final Class typeHint) {
- // We delegate to Global, as the implementation uses dynamic call sites to invoke object's "toString" and
- // "valueOf" methods, and in order to avoid those call sites from becoming megamorphic when multiple contexts
- // are being executed in a long-running program, we move the code and their associated dynamic call sites
- // (Global.TO_STRING and Global.VALUE_OF) into per-context code.
- return Context.getGlobal().getDefaultValue(this, typeHint);
- }
-
- /**
- * Checking whether a script object is an instance of another. Used
- * in {@link ScriptFunction} for hasInstance implementation, walks
- * the proto chain
- *
- * @param instance instance to check
- * @return true if 'instance' is an instance of this object
- */
- public boolean isInstance(final ScriptObject instance) {
- return false;
- }
-
- /**
- * Flag this ScriptObject as non extensible
- *
- * @return the object after being made non extensible
- */
- public ScriptObject preventExtensions() {
- PropertyMap oldMap = getMap();
- while (!compareAndSetMap(oldMap, getMap().preventExtensions())) {
- oldMap = getMap();
- }
-
- //invalidate any fast array setters
- final ArrayData array = getArray();
- assert array != null;
- setArray(ArrayData.preventExtension(array));
- return this;
- }
-
- /**
- * Check whether if an Object (not just a ScriptObject) represents JavaScript array
- *
- * @param obj object to check
- *
- * @return true if array
- */
- public static boolean isArray(final Object obj) {
- return obj instanceof ScriptObject && ((ScriptObject)obj).isArray();
- }
-
- /**
- * Check if this ScriptObject is an array
- * @return true if array
- */
- public final boolean isArray() {
- return (flags & IS_ARRAY) != 0;
- }
-
- /**
- * Flag this ScriptObject as being an array
- */
- public final void setIsArray() {
- flags |= IS_ARRAY;
- }
-
- /**
- * Check if this ScriptObject is an {@code arguments} vector
- * @return true if arguments vector
- */
- public final boolean isArguments() {
- return (flags & IS_ARGUMENTS) != 0;
- }
-
- /**
- * Flag this ScriptObject as being an {@code arguments} vector
- */
- public final void setIsArguments() {
- flags |= IS_ARGUMENTS;
- }
-
- /**
- * Check if this object has non-writable length property
- *
- * @return {@code true} if 'length' property is non-writable
- */
- public boolean isLengthNotWritable() {
- return (flags & IS_LENGTH_NOT_WRITABLE) != 0;
- }
-
- /**
- * Flag this object as having non-writable length property.
- */
- public void setIsLengthNotWritable() {
- flags |= IS_LENGTH_NOT_WRITABLE;
- }
-
- /**
- * Get the {@link ArrayData}, for this ScriptObject, ensuring it is of a type
- * that can handle elementType
- * @param elementType elementType
- * @return array data
- */
- public final ArrayData getArray(final Class elementType) {
- if (elementType == null) {
- return arrayData;
- }
- final ArrayData newArrayData = arrayData.convert(elementType);
- if (newArrayData != arrayData) {
- arrayData = newArrayData;
- }
- return newArrayData;
- }
-
- /**
- * Get the {@link ArrayData} for this ScriptObject if it is an array
- * @return array data
- */
- public final ArrayData getArray() {
- return arrayData;
- }
-
- /**
- * Set the {@link ArrayData} for this ScriptObject if it is to be an array
- * @param arrayData the array data
- */
- public final void setArray(final ArrayData arrayData) {
- this.arrayData = arrayData;
- }
-
- /**
- * Check if this ScriptObject is extensible
- * @return true if extensible
- */
- public boolean isExtensible() {
- return getMap().isExtensible();
- }
-
- /**
- * ECMAScript 15.2.3.8 - seal implementation
- * @return the sealed ScriptObject
- */
- public ScriptObject seal() {
- PropertyMap oldMap = getMap();
-
- while (true) {
- final PropertyMap newMap = getMap().seal();
-
- if (!compareAndSetMap(oldMap, newMap)) {
- oldMap = getMap();
- } else {
- setArray(ArrayData.seal(getArray()));
- return this;
- }
- }
- }
-
- /**
- * Check whether this ScriptObject is sealed
- * @return true if sealed
- */
- public boolean isSealed() {
- return getMap().isSealed();
- }
-
- /**
- * ECMA 15.2.39 - freeze implementation. Freeze this ScriptObject
- * @return the frozen ScriptObject
- */
- public ScriptObject freeze() {
- PropertyMap oldMap = getMap();
-
- while (true) {
- final PropertyMap newMap = getMap().freeze();
-
- if (!compareAndSetMap(oldMap, newMap)) {
- oldMap = getMap();
- } else {
- setArray(ArrayData.freeze(getArray()));
- return this;
- }
- }
- }
-
- /**
- * Check whether this ScriptObject is frozen
- * @return true if frozen
- */
- public boolean isFrozen() {
- return getMap().isFrozen();
- }
-
- /**
- * Check whether this ScriptObject is scope
- * @return true if scope
- */
- public boolean isScope() {
- return false;
- }
-
- /**
- * Tag this script object as built in
- */
- public final void setIsBuiltin() {
- flags |= IS_BUILTIN;
- }
-
- /**
- * Check if this script object is built in
- * @return true if build in
- */
- public final boolean isBuiltin() {
- return (flags & IS_BUILTIN) != 0;
- }
-
- /**
- * Tag this script object as internal object that should not be visible to script code.
- */
- public final void setIsInternal() {
- flags |= IS_INTERNAL;
- }
-
- /**
- * Check if this script object is an internal object that should not be visible to script code.
- * @return true if internal
- */
- public final boolean isInternal() {
- return (flags & IS_INTERNAL) != 0;
- }
-
- /**
- * Clears the properties from a ScriptObject
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @param strict strict mode or not
- */
- public void clear(final boolean strict) {
- final Iterator iter = propertyIterator();
- while (iter.hasNext()) {
- delete(iter.next(), strict);
- }
- }
-
- /**
- * Checks if a property with a given key is present in a ScriptObject
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @param key the key to check for
- * @return true if a property with the given key exists, false otherwise
- */
- public boolean containsKey(final Object key) {
- return has(key);
- }
-
- /**
- * Checks if a property with a given value is present in a ScriptObject
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @param value value to check for
- * @return true if a property with the given value exists, false otherwise
- */
- public boolean containsValue(final Object value) {
- final Iterator iter = valueIterator();
- while (iter.hasNext()) {
- if (iter.next().equals(value)) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * Returns the set of {@literal } entries that make up this
- * ScriptObject's properties
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @return an entry set of all the properties in this object
- */
- public Set> entrySet() {
- final Iterator iter = propertyIterator();
- final Set> entries = new HashSet<>();
- while (iter.hasNext()) {
- final Object key = iter.next();
- entries.add(new AbstractMap.SimpleImmutableEntry<>(key, get(key)));
- }
- return Collections.unmodifiableSet(entries);
- }
-
- /**
- * Check whether a ScriptObject contains no properties
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @return true if object has no properties
- */
- public boolean isEmpty() {
- return !propertyIterator().hasNext();
- }
-
- /**
- * Return the set of keys (property names) for all properties
- * in this ScriptObject
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @return keySet of this ScriptObject
- */
- public Set keySet() {
- final Iterator iter = propertyIterator();
- final Set keySet = new HashSet<>();
- while (iter.hasNext()) {
- keySet.add(iter.next());
- }
- return Collections.unmodifiableSet(keySet);
- }
-
- /**
- * Put a property in the ScriptObject
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @param key property key
- * @param value property value
- * @param strict strict mode or not
- * @return oldValue if property with same key existed already
- */
- public Object put(final Object key, final Object value, final boolean strict) {
- final Object oldValue = get(key);
- final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0;
- set(key, value, scriptObjectFlags);
- return oldValue;
- }
-
- /**
- * Put several properties in the ScriptObject given a mapping
- * of their keys to their values
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @param otherMap a {@literal } map of properties to add
- * @param strict strict mode or not
- */
- public void putAll(final Map otherMap, final boolean strict) {
- final int scriptObjectFlags = strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0;
- for (final Map.Entry entry : otherMap.entrySet()) {
- set(entry.getKey(), entry.getValue(), scriptObjectFlags);
- }
- }
-
- /**
- * Remove a property from the ScriptObject.
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @param key the key of the property
- * @param strict strict mode or not
- * @return the oldValue of the removed property
- */
- public Object remove(final Object key, final boolean strict) {
- final Object oldValue = get(key);
- delete(key, strict);
- return oldValue;
- }
-
- /**
- * Return the size of the ScriptObject - i.e. the number of properties
- * it contains
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @return number of properties in ScriptObject
- */
- public int size() {
- int n = 0;
- for (final Iterator iter = propertyIterator(); iter.hasNext(); iter.next()) {
- n++;
- }
- return n;
- }
-
- /**
- * Return the values of the properties in the ScriptObject
- * (java.util.Map-like method to help ScriptObjectMirror implementation)
- *
- * @return collection of values for the properties in this ScriptObject
- */
- public Collection values() {
- final List values = new ArrayList<>(size());
- final Iterator iter = valueIterator();
- while (iter.hasNext()) {
- values.add(iter.next());
- }
- return Collections.unmodifiableList(values);
- }
-
- /**
- * Lookup method that, given a CallSiteDescriptor, looks up the target
- * MethodHandle and creates a GuardedInvocation
- * with the appropriate guard(s).
- *
- * @param desc call site descriptor
- * @param request the link request
- *
- * @return GuardedInvocation for the callsite
- */
- public GuardedInvocation lookup(final CallSiteDescriptor desc, final LinkRequest request) {
- // NOTE: we support GET:ELEMENT and SET:ELEMENT as JavaScript doesn't distinguish items from properties. Nashorn itself
- // emits "GET:PROPERTY|ELEMENT|METHOD:identifier" for "." and "GET:ELEMENT|PROPERTY|METHOD" for "[]", but we are
- // more flexible here and dispatch not on operation name (getProp vs. getElem), but rather on whether the
- // operation has an associated name or not.
- switch (NashornCallSiteDescriptor.getStandardOperation(desc)) {
- case GET:
- return desc.getOperation() instanceof NamedOperation
- ? findGetMethod(desc, request)
- : findGetIndexMethod(desc, request);
- case SET:
- return desc.getOperation() instanceof NamedOperation
- ? findSetMethod(desc, request)
- : findSetIndexMethod(desc, request);
- case REMOVE:
- final GuardedInvocation inv = NashornCallSiteDescriptor.isStrict(desc) ? DELETE_GUARDED_STRICT : DELETE_GUARDED;
- final Object name = NamedOperation.getName(desc.getOperation());
- if (name != null) {
- return inv.replaceMethods(MH.insertArguments(inv.getInvocation(), 1, name), inv.getGuard());
- }
- return inv;
- case CALL:
- return findCallMethod(desc, request);
- case NEW:
- return findNewMethod(desc, request);
- default:
- return null;
- }
- }
-
- /**
- * Find the appropriate New method for an invoke dynamic call.
- *
- * @param desc The invoke dynamic call site descriptor.
- * @param request The link request
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- protected GuardedInvocation findNewMethod(final CallSiteDescriptor desc, final LinkRequest request) {
- return notAFunction(desc);
- }
-
- /**
- * Find the appropriate CALL method for an invoke dynamic call.
- * This generates "not a function" always
- *
- * @param desc the call site descriptor.
- * @param request the link request
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- protected GuardedInvocation findCallMethod(final CallSiteDescriptor desc, final LinkRequest request) {
- return notAFunction(desc);
- }
-
- private GuardedInvocation notAFunction(final CallSiteDescriptor desc) {
- throw typeError("not.a.function", NashornCallSiteDescriptor.getFunctionErrorMessage(desc, this));
- }
-
- /**
- * Test whether this object contains in its prototype chain or is itself a with-object.
- * @return true if a with-object was found
- */
- boolean hasWithScope() {
- return false;
- }
-
- /**
- * Add a filter to the first argument of {@code methodHandle} that calls its {@link #getProto()} method
- * {@code depth} times.
- * @param methodHandle a method handle
- * @param depth distance to target prototype
- * @return the filtered method handle
- */
- static MethodHandle addProtoFilter(final MethodHandle methodHandle, final int depth) {
- if (depth == 0) {
- return methodHandle;
- }
- final int listIndex = depth - 1; // We don't need 0-deep walker
- MethodHandle filter = listIndex < PROTO_FILTERS.size() ? PROTO_FILTERS.get(listIndex) : null;
-
- if (filter == null) {
- filter = addProtoFilter(GETPROTO, depth - 1);
- PROTO_FILTERS.add(null);
- PROTO_FILTERS.set(listIndex, filter);
- }
-
- return MH.filterArguments(methodHandle, 0, filter.asType(filter.type().changeReturnType(methodHandle.type().parameterType(0))));
- }
-
- /**
- * Find the appropriate GET method for an invoke dynamic call.
- *
- * @param desc the call site descriptor
- * @param request the link request
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
- final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
-
- String name = NashornCallSiteDescriptor.getOperand(desc);
- if (NashornCallSiteDescriptor.isApplyToCall(desc)) {
- if (Global.isBuiltinFunctionPrototypeApply()) {
- name = "call";
- }
- }
-
- if (request.isCallSiteUnstable() || hasWithScope()) {
- return findMegaMorphicGetMethod(desc, name, NashornCallSiteDescriptor.isMethodFirstOperation(desc));
- }
-
- final FindProperty find = findProperty(name, true, NashornCallSiteDescriptor.isScope(desc), this);
- MethodHandle mh;
-
- if (find == null) {
- if (!NashornCallSiteDescriptor.isMethodFirstOperation(desc)) {
- return noSuchProperty(desc, request);
- } else {
- return noSuchMethod(desc, request);
- }
- }
-
- final GlobalConstants globalConstants = getGlobalConstants();
- if (globalConstants != null) {
- final GuardedInvocation cinv = globalConstants.findGetMethod(find, this, desc);
- if (cinv != null) {
- return cinv;
- }
- }
-
- final Class returnType = desc.getMethodType().returnType();
- final Property property = find.getProperty();
-
- final int programPoint = NashornCallSiteDescriptor.isOptimistic(desc) ?
- NashornCallSiteDescriptor.getProgramPoint(desc) :
- UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
-
- mh = find.getGetter(returnType, programPoint, request);
- // Get the appropriate guard for this callsite and property.
- final MethodHandle guard = NashornGuards.getGuard(this, property, desc, explicitInstanceOfCheck);
- final ScriptObject owner = find.getOwner();
- final Class exception = explicitInstanceOfCheck ? null : ClassCastException.class;
-
- final SwitchPoint[] protoSwitchPoints;
-
- if (mh == null) {
- mh = Lookup.emptyGetter(returnType);
- protoSwitchPoints = getProtoSwitchPoints(name, owner);
- } else if (!find.isSelf()) {
- assert mh.type().returnType().equals(returnType) :
- "return type mismatch for getter " + mh.type().returnType() + " != " + returnType;
- if (!property.isAccessorProperty()) {
- // Add a filter that replaces the self object with the prototype owning the property.
- mh = addProtoFilter(mh, find.getProtoChainLength());
- }
- protoSwitchPoints = getProtoSwitchPoints(name, owner);
- } else {
- protoSwitchPoints = null;
- }
-
- final GuardedInvocation inv = new GuardedInvocation(mh, guard, protoSwitchPoints, exception);
- return inv.addSwitchPoint(findBuiltinSwitchPoint(name));
- }
-
- private static GuardedInvocation findMegaMorphicGetMethod(final CallSiteDescriptor desc, final String name, final boolean isMethod) {
- Context.getContextTrusted().getLogger(ObjectClassGenerator.class).warning("Megamorphic getter: ", desc, " ", name + " ", isMethod);
- final MethodHandle invoker = MH.insertArguments(MEGAMORPHIC_GET, 1, name, isMethod, NashornCallSiteDescriptor.isScope(desc));
- final MethodHandle guard = getScriptObjectGuard(desc.getMethodType(), true);
- return new GuardedInvocation(invoker, guard);
- }
-
- @SuppressWarnings("unused")
- private Object megamorphicGet(final String key, final boolean isMethod, final boolean isScope) {
- final FindProperty find = findProperty(key, true, isScope, this);
- if (find != null) {
- // If this is a method invocation, and found property has a different self object then this,
- // then return a function bound to the self object. This is the case for functions in with expressions.
- final Object value = find.getObjectValue();
- if (isMethod && value instanceof ScriptFunction && find.getSelf() != this && !find.getSelf().isInternal()) {
- return ((ScriptFunction) value).createBound(find.getSelf(), ScriptRuntime.EMPTY_ARRAY);
- }
- return value;
- }
-
- return isMethod ? getNoSuchMethod(key, isScope, INVALID_PROGRAM_POINT) : invokeNoSuchProperty(key, isScope, INVALID_PROGRAM_POINT);
- }
-
- // Marks a property as declared and sets its value. Used as slow path for block-scoped LET and CONST
- @SuppressWarnings("unused")
- private void declareAndSet(final String key, final Object value) {
- declareAndSet(findProperty(key, false), value);
- }
-
- private void declareAndSet(final FindProperty find, final Object value) {
- final PropertyMap oldMap = getMap();
- assert find != null;
-
- final Property property = find.getProperty();
- assert property != null;
- assert property.needsDeclaration();
-
- final PropertyMap newMap = oldMap.replaceProperty(property, property.removeFlags(Property.NEEDS_DECLARATION));
- setMap(newMap);
- set(property.getKey(), value, NashornCallSiteDescriptor.CALLSITE_DECLARE);
- }
-
- /**
- * Find the appropriate GETINDEX method for an invoke dynamic call.
- *
- * @param desc the call site descriptor
- * @param request the link request
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- protected GuardedInvocation findGetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) {
- final MethodType callType = desc.getMethodType();
- final Class returnType = callType.returnType();
- final Class returnClass = returnType.isPrimitive() ? returnType : Object.class;
- final Class keyClass = callType.parameterType(1);
- final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
-
- final String name;
- if (returnClass.isPrimitive()) {
- //turn e.g. get with a double into getDouble
- final String returnTypeName = returnClass.getName();
- name = "get" + Character.toUpperCase(returnTypeName.charAt(0)) + returnTypeName.substring(1, returnTypeName.length());
- } else {
- name = "get";
- }
-
- final MethodHandle mh = findGetIndexMethodHandle(returnClass, name, keyClass, desc);
- return new GuardedInvocation(mh, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
- }
-
- private static MethodHandle getScriptObjectGuard(final MethodType type, final boolean explicitInstanceOfCheck) {
- return ScriptObject.class.isAssignableFrom(type.parameterType(0)) ? null : NashornGuards.getScriptObjectGuard(explicitInstanceOfCheck);
- }
-
- /**
- * Find a handle for a getIndex method
- * @param returnType return type for getter
- * @param name name
- * @param elementType index type for getter
- * @param desc call site descriptor
- * @return method handle for getter
- */
- private static MethodHandle findGetIndexMethodHandle(final Class returnType, final String name, final Class elementType, final CallSiteDescriptor desc) {
- if (!returnType.isPrimitive()) {
- return findOwnMH_V(name, returnType, elementType);
- }
-
- return MH.insertArguments(
- findOwnMH_V(name, returnType, elementType, int.class),
- 2,
- NashornCallSiteDescriptor.isOptimistic(desc) ?
- NashornCallSiteDescriptor.getProgramPoint(desc) :
- INVALID_PROGRAM_POINT);
- }
-
- /**
- * Get an array of switch points for a property with the given {@code name} that will be
- * invalidated when the property definition is changed in this object's prototype chain.
- * Returns {@code null} if the property is defined in this object itself.
- *
- * @param name the property name
- * @param owner the property owner, null if property is not defined
- * @return an array of SwitchPoints or null
- */
- public final SwitchPoint[] getProtoSwitchPoints(final String name, final ScriptObject owner) {
- if (owner == this || getProto() == null) {
- return null;
- }
-
- final Set switchPoints = new HashSet<>();
- SwitchPoint switchPoint = getProto().getMap().getSwitchPoint(name);
-
- if (switchPoint == null) {
- switchPoint = new SwitchPoint();
- for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) {
- obj.getProto().getMap().addSwitchPoint(name, switchPoint);
- }
- }
-
- switchPoints.add(switchPoint);
-
- for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) {
- final SwitchPoint sharedProtoSwitchPoint = obj.getProto().getMap().getSharedProtoSwitchPoint();
- if (sharedProtoSwitchPoint != null && !sharedProtoSwitchPoint.hasBeenInvalidated()) {
- switchPoints.add(sharedProtoSwitchPoint);
- }
- }
-
- return switchPoints.toArray(new SwitchPoint[0]);
- }
-
- // Similar to getProtoSwitchPoints method above, but used for additional prototype switchpoints of
- // properties that are known not to exist, e.g. the original property name in a __noSuchProperty__ invocation.
- final SwitchPoint getProtoSwitchPoint(final String name) {
- if (getProto() == null) {
- return null;
- }
-
- SwitchPoint switchPoint = getProto().getMap().getSwitchPoint(name);
-
- if (switchPoint == null) {
- switchPoint = new SwitchPoint();
- for (ScriptObject obj = this; obj.getProto() != null; obj = obj.getProto()) {
- obj.getProto().getMap().addSwitchPoint(name, switchPoint);
- }
- }
-
- return switchPoint;
- }
-
- private void checkSharedProtoMap() {
- // Check if our map has an expected shared prototype property map. If it has, make sure that
- // the prototype map has not been invalidated, and that it does match the actual map of the prototype.
- if (getMap().isInvalidSharedMapFor(getProto())) {
- // Change our own map to one that does not assume a shared prototype map.
- setMap(getMap().makeUnsharedCopy());
- }
- }
-
- /**
- * Find the appropriate SET method for an invoke dynamic call.
- *
- * @param desc the call site descriptor
- * @param request the link request
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
- final String name = NashornCallSiteDescriptor.getOperand(desc);
-
- if (request.isCallSiteUnstable() || hasWithScope()) {
- return findMegaMorphicSetMethod(desc, name);
- }
-
- final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
-
- /*
- * If doing property set on a scope object, we should stop proto search on the first
- * non-scope object. Without this, for example, when assigning "toString" on global scope,
- * we'll end up assigning it on it's proto - which is Object.prototype.toString !!
- *
- * toString = function() { print("global toString"); } // don't affect Object.prototype.toString
- */
- FindProperty find = findProperty(name, true, NashornCallSiteDescriptor.isScope(desc), this);
-
- // If it's not a scope search, then we don't want any inherited properties except those with user defined accessors.
- if (find != null && find.isInheritedOrdinaryProperty()) {
- // We should still check if inherited data property is not writable
- if (isExtensible() && !find.getProperty().isWritable()) {
- return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true);
- }
- // Otherwise, forget the found property unless this is a scope callsite and the owner is a scope object as well.
- if (!NashornCallSiteDescriptor.isScope(desc) || !find.getOwner().isScope()) {
- find = null;
- }
- }
-
- if (find != null) {
- if (!find.getProperty().isWritable() && !NashornCallSiteDescriptor.isDeclaration(desc)) {
- if (NashornCallSiteDescriptor.isScope(desc) && find.getProperty().isLexicalBinding()) {
- throw typeError("assign.constant", name); // Overwriting ES6 const should throw also in non-strict mode.
- }
- // Existing, non-writable data property
- return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", true);
- }
- if (!find.getProperty().hasNativeSetter()) {
- // Existing accessor property without setter
- return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.has.no.setter", true);
- }
- } else {
- if (!isExtensible()) {
- return createEmptySetMethod(desc, explicitInstanceOfCheck, "object.non.extensible", false);
- }
- }
-
- final GuardedInvocation inv = new SetMethodCreator(this, find, desc, request).createGuardedInvocation(findBuiltinSwitchPoint(name));
-
- final GlobalConstants globalConstants = getGlobalConstants();
- if (globalConstants != null) {
- final GuardedInvocation cinv = globalConstants.findSetMethod(find, this, inv, desc, request);
- if (cinv != null) {
- return cinv;
- }
- }
-
- return inv;
- }
-
- private GlobalConstants getGlobalConstants() {
- // Avoid hitting getContext() which might be costly for a non-Global unless needed.
- return GlobalConstants.GLOBAL_ONLY && !isGlobal() ? null : getContext().getGlobalConstants();
- }
-
- private GuardedInvocation createEmptySetMethod(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String strictErrorMessage, final boolean canBeFastScope) {
- final String name = NashornCallSiteDescriptor.getOperand(desc);
- if (NashornCallSiteDescriptor.isStrict(desc)) {
- throw typeError(strictErrorMessage, name, ScriptRuntime.safeToString(this));
- }
- assert canBeFastScope || !NashornCallSiteDescriptor.isFastScope(desc);
- return new GuardedInvocation(
- Lookup.EMPTY_SETTER,
- NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck),
- getProtoSwitchPoints(name, null),
- explicitInstanceOfCheck ? null : ClassCastException.class);
- }
-
- @SuppressWarnings("unused")
- private boolean extensionCheck(final boolean isStrict, final String name) {
- if (isExtensible()) {
- return true; //go on and do the set. this is our guard
- } else if (isStrict) {
- //throw an error for attempting to do the set in strict mode
- throw typeError("object.non.extensible", name, ScriptRuntime.safeToString(this));
- } else {
- //not extensible, non strict - this is a nop
- return false;
- }
- }
-
- private static GuardedInvocation findMegaMorphicSetMethod(final CallSiteDescriptor desc, final String name) {
- Context.getContextTrusted().getLogger(ObjectClassGenerator.class).warning("Megamorphic setter: ", desc, " ", name);
- final MethodType type = desc.getMethodType().insertParameterTypes(1, Object.class);
- //never bother with ClassCastExceptionGuard for megamorphic callsites
- final GuardedInvocation inv = findSetIndexMethod(desc, false, type);
- return inv.replaceMethods(MH.insertArguments(inv.getInvocation(), 1, name), inv.getGuard());
- }
-
- @SuppressWarnings("unused")
- private static Object globalFilter(final Object object) {
- ScriptObject sobj = (ScriptObject) object;
- while (sobj != null && !(sobj instanceof Global)) {
- sobj = sobj.getProto();
- }
- return sobj;
- }
-
- /**
- * Lookup function for the set index method, available for subclasses as well, e.g. {@link NativeArray}
- * provides special quick accessor linkage for continuous arrays that are represented as Java arrays
- *
- * @param desc call site descriptor
- * @param request link request
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- protected GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final LinkRequest request) { // array, index, value
- return findSetIndexMethod(desc, explicitInstanceOfCheck(desc, request), desc.getMethodType());
- }
-
- /**
- * Find the appropriate SETINDEX method for an invoke dynamic call.
- *
- * @param desc the call site descriptor
- * @param explicitInstanceOfCheck add an explicit instanceof check?
- * @param callType the method type at the call site
- *
- * @return GuardedInvocation to be invoked at call site.
- */
- private static GuardedInvocation findSetIndexMethod(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final MethodType callType) {
- assert callType.parameterCount() == 3;
- final Class keyClass = callType.parameterType(1);
- final Class valueClass = callType.parameterType(2);
-
- MethodHandle methodHandle = findOwnMH_V("set", void.class, keyClass, valueClass, int.class);
- methodHandle = MH.insertArguments(methodHandle, 3, NashornCallSiteDescriptor.getFlags(desc));
-
- return new GuardedInvocation(methodHandle, getScriptObjectGuard(callType, explicitInstanceOfCheck), (SwitchPoint)null, explicitInstanceOfCheck ? null : ClassCastException.class);
- }
-
- /**
- * Fall back if a function property is not found.
- * @param desc The call site descriptor
- * @param request the link request
- * @return GuardedInvocation to be invoked at call site.
- */
- public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) {
- final String name = NashornCallSiteDescriptor.getOperand(desc);
- final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
- final boolean scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);
-
- if (find == null) {
- return noSuchProperty(desc, request)
- // Add proto switchpoint to switch from no-such-property to no-such-method if it is ever defined.
- .addSwitchPoint(getProtoSwitchPoint(NO_SUCH_METHOD_NAME));
- }
-
- final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
-
- final Object value = find.getObjectValue();
- if (!(value instanceof ScriptFunction)) {
- return createEmptyGetter(desc, explicitInstanceOfCheck, name);
- }
-
- final ScriptFunction func = (ScriptFunction)value;
- final Object thiz = scopeCall && func.isStrict() ? UNDEFINED : this;
- // TODO: It'd be awesome if we could bind "name" without binding "this".
- // Since we're binding this we must use an identity guard here.
- return new GuardedInvocation(
- MH.dropArguments(
- MH.constant(
- ScriptFunction.class,
- func.createBound(thiz, new Object[] { name })),
- 0,
- Object.class),
- NashornGuards.combineGuards(
- NashornGuards.getIdentityGuard(this),
- NashornGuards.getMapGuard(getMap(), true)))
- // Add a protoype switchpoint for the original name so this gets invalidated if it is ever defined.
- .addSwitchPoint(getProtoSwitchPoint(name));
- }
-
- /**
- * Fall back if a property is not found.
- * @param desc the call site descriptor.
- * @param request the link request
- * @return GuardedInvocation to be invoked at call site.
- */
- public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) {
- final String name = NashornCallSiteDescriptor.getOperand(desc);
- final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
- final boolean scopeAccess = isScope() && NashornCallSiteDescriptor.isScope(desc);
-
- if (find != null) {
- final Object value = find.getObjectValue();
- ScriptFunction func = null;
- MethodHandle mh = null;
-
- if (value instanceof ScriptFunction) {
- func = (ScriptFunction)value;
- mh = getCallMethodHandle(func, desc.getMethodType(), name);
- }
-
- if (mh != null) {
- assert func != null;
- if (scopeAccess && func.isStrict()) {
- mh = bindTo(mh, UNDEFINED);
- }
-
- return new GuardedInvocation(
- mh,
- find.isSelf()?
- getKnownFunctionPropertyGuardSelf(
- getMap(),
- find.getGetter(Object.class, INVALID_PROGRAM_POINT, request),
- func)
- :
- //TODO this always does a scriptobject check
- getKnownFunctionPropertyGuardProto(
- getMap(),
- find.getGetter(Object.class, INVALID_PROGRAM_POINT, request),
- find.getProtoChainLength(),
- func),
- getProtoSwitchPoints(NO_SUCH_PROPERTY_NAME, find.getOwner()),
- //TODO this doesn't need a ClassCastException as guard always checks script object
- null)
- // Add a protoype switchpoint for the original name so this gets invalidated if it is ever defined.
- .addSwitchPoint(getProtoSwitchPoint(name));
- }
- }
-
- if (scopeAccess) {
- throw referenceError("not.defined", name);
- }
-
- return createEmptyGetter(desc, explicitInstanceOfCheck(desc, request), name);
- }
-
- /**
- * Invoke fall back if a property is not found.
- * @param key Name of property.
- * @param isScope is this a scope access?
- * @param programPoint program point
- * @return Result from call.
- */
- protected Object invokeNoSuchProperty(final Object key, final boolean isScope, final int programPoint) {
- final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
- final Object func = (find != null)? find.getObjectValue() : null;
-
- Object ret = UNDEFINED;
- if (func instanceof ScriptFunction) {
- final ScriptFunction sfunc = (ScriptFunction)func;
- final Object self = isScope && sfunc.isStrict()? UNDEFINED : this;
- ret = ScriptRuntime.apply(sfunc, self, key);
- } else if (isScope) {
- throw referenceError("not.defined", key.toString());
- }
-
- if (isValid(programPoint)) {
- throw new UnwarrantedOptimismException(ret, programPoint);
- }
-
- return ret;
- }
-
-
- /**
- * Get __noSuchMethod__ as a function bound to this object and {@code name} if it is defined.
- * @param name the method name
- * @param isScope is this a scope access?
- * @return the bound function, or undefined
- */
- private Object getNoSuchMethod(final String name, final boolean isScope, final int programPoint) {
- final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
-
- if (find == null) {
- return invokeNoSuchProperty(name, isScope, programPoint);
- }
-
- final Object value = find.getObjectValue();
- if (!(value instanceof ScriptFunction)) {
- if (isScope) {
- throw referenceError("not.defined", name);
- }
- return UNDEFINED;
- }
-
- final ScriptFunction func = (ScriptFunction)value;
- final Object self = isScope && func.isStrict()? UNDEFINED : this;
- return func.createBound(self, new Object[] {name});
- }
-
- private GuardedInvocation createEmptyGetter(final CallSiteDescriptor desc, final boolean explicitInstanceOfCheck, final String name) {
- if (NashornCallSiteDescriptor.isOptimistic(desc)) {
- throw new UnwarrantedOptimismException(UNDEFINED, NashornCallSiteDescriptor.getProgramPoint(desc), Type.OBJECT);
- }
-
- return new GuardedInvocation(Lookup.emptyGetter(desc.getMethodType().returnType()),
- NashornGuards.getMapGuard(getMap(), explicitInstanceOfCheck), getProtoSwitchPoints(name, null),
- explicitInstanceOfCheck ? null : ClassCastException.class);
- }
-
- private abstract static class ScriptObjectIterator implements Iterator {
- protected T[] values;
- protected final ScriptObject object;
- private int index;
-
- ScriptObjectIterator(final ScriptObject object) {
- this.object = object;
- }
-
- protected abstract void init();
-
- @Override
- public boolean hasNext() {
- if (values == null) {
- init();
- }
- return index < values.length;
- }
-
- @Override
- public T next() {
- if (values == null) {
- init();
- }
- return values[index++];
- }
-
- @Override
- public void remove() {
- throw new UnsupportedOperationException("remove");
- }
- }
-
- private static class KeyIterator extends ScriptObjectIterator {
- KeyIterator(final ScriptObject object) {
- super(object);
- }
-
- @Override
- protected void init() {
- final Set keys = new LinkedHashSet<>();
- final Set nonEnumerable = new HashSet<>();
- for (ScriptObject self = object; self != null; self = self.getProto()) {
- keys.addAll(Arrays.asList(self.getOwnKeys(String.class, false, nonEnumerable)));
- }
- this.values = keys.toArray(new String[0]);
- }
- }
-
- private static class ValueIterator extends ScriptObjectIterator {
- ValueIterator(final ScriptObject object) {
- super(object);
- }
-
- @Override
- protected void init() {
- final ArrayList valueList = new ArrayList<>();
- final Set nonEnumerable = new HashSet<>();
- for (ScriptObject self = object; self != null; self = self.getProto()) {
- for (final String key : self.getOwnKeys(String.class, false, nonEnumerable)) {
- valueList.add(self.get(key));
- }
- }
- this.values = valueList.toArray(new Object[0]);
- }
- }
-
- /**
- * Add a spill property for the given key.
- * @param key Property key.
- * @param flags Property flags.
- * @return Added property.
- */
- private Property addSpillProperty(final Object key, final int flags, final Object value, final boolean hasInitialValue) {
- final PropertyMap propertyMap = getMap();
- final int fieldSlot = propertyMap.getFreeFieldSlot();
- final int propertyFlags = flags | (useDualFields() ? Property.DUAL_FIELDS : 0);
-
- Property property;
- if (fieldSlot > -1) {
- property = hasInitialValue ?
- new AccessorProperty(key, propertyFlags, fieldSlot, this, value) :
- new AccessorProperty(key, propertyFlags, getClass(), fieldSlot);
- property = addOwnProperty(property);
- } else {
- final int spillSlot = propertyMap.getFreeSpillSlot();
- property = hasInitialValue ?
- new SpillProperty(key, propertyFlags, spillSlot, this, value) :
- new SpillProperty(key, propertyFlags, spillSlot);
- property = addOwnProperty(property);
- ensureSpillSize(property.getSlot());
- }
- return property;
- }
-
- /**
- * Add a spill entry for the given key.
- * @param key Property key.
- * @return Setter method handle.
- */
- MethodHandle addSpill(final Class type, final String key) {
- return addSpillProperty(key, 0, null, false).getSetter(type, getMap());
- }
-
- /**
- * Make sure arguments are paired correctly, with respect to more parameters than declared,
- * fewer parameters than declared and other things that JavaScript allows. This might involve
- * creating collectors.
- *
- * @param methodHandle method handle for invoke
- * @param callType type of the call
- *
- * @return method handle with adjusted arguments
- */
- protected static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType) {
- return pairArguments(methodHandle, callType, null);
- }
-
- /**
- * Make sure arguments are paired correctly, with respect to more parameters than declared,
- * fewer parameters than declared and other things that JavaScript allows. This might involve
- * creating collectors.
- *
- * Make sure arguments are paired correctly.
- * @param methodHandle MethodHandle to adjust.
- * @param callType MethodType of the call site.
- * @param callerVarArg true if the caller is vararg, false otherwise, null if it should be inferred from the
- * {@code callType}; basically, if the last parameter type of the call site is an array, it'll be considered a
- * variable arity call site. These are ordinarily rare; Nashorn code generator creates variable arity call sites
- * when the call has more than {@link LinkerCallSite#ARGLIMIT} parameters.
- *
- * @return method handle with adjusted arguments
- */
- public static MethodHandle pairArguments(final MethodHandle methodHandle, final MethodType callType, final Boolean callerVarArg) {
- final MethodType methodType = methodHandle.type();
- if (methodType.equals(callType.changeReturnType(methodType.returnType()))) {
- return methodHandle;
- }
-
- final int parameterCount = methodType.parameterCount();
- final int callCount = callType.parameterCount();
-
- final boolean isCalleeVarArg = parameterCount > 0 && methodType.parameterType(parameterCount - 1).isArray();
- final boolean isCallerVarArg = callerVarArg != null ? callerVarArg : callCount > 0 &&
- callType.parameterType(callCount - 1).isArray();
-
- if (isCalleeVarArg) {
- return isCallerVarArg ?
- methodHandle :
- MH.asCollector(methodHandle, Object[].class, callCount - parameterCount + 1);
- }
-
- if (isCallerVarArg) {
- return adaptHandleToVarArgCallSite(methodHandle, callCount);
- }
-
- if (callCount < parameterCount) {
- final int missingArgs = parameterCount - callCount;
- final Object[] fillers = new Object[missingArgs];
-
- Arrays.fill(fillers, UNDEFINED);
-
- if (isCalleeVarArg) {
- fillers[missingArgs - 1] = ScriptRuntime.EMPTY_ARRAY;
- }
-
- return MH.insertArguments(
- methodHandle,
- parameterCount - missingArgs,
- fillers);
- }
-
- if (callCount > parameterCount) {
- final int discardedArgs = callCount - parameterCount;
-
- final Class[] discards = new Class[discardedArgs];
- Arrays.fill(discards, Object.class);
-
- return MH.dropArguments(methodHandle, callCount - discardedArgs, discards);
- }
-
- return methodHandle;
- }
-
- static MethodHandle adaptHandleToVarArgCallSite(final MethodHandle mh, final int callSiteParamCount) {
- final int spreadArgs = mh.type().parameterCount() - callSiteParamCount + 1;
- return MH.filterArguments(
- MH.asSpreader(
- mh,
- Object[].class,
- spreadArgs),
- callSiteParamCount - 1,
- MH.insertArguments(
- TRUNCATINGFILTER,
- 0,
- spreadArgs)
- );
- }
-
- @SuppressWarnings("unused")
- private static Object[] truncatingFilter(final int n, final Object[] array) {
- final int length = array == null ? 0 : array.length;
- if (n == length) {
- return array == null ? ScriptRuntime.EMPTY_ARRAY : array;
- }
-
- final Object[] newArray = new Object[n];
-
- if (array != null) {
- System.arraycopy(array, 0, newArray, 0, Math.min(n, length));
- }
-
- if (length < n) {
- final Object fill = UNDEFINED;
-
- for (int i = length; i < n; i++) {
- newArray[i] = fill;
- }
- }
-
- return newArray;
- }
-
- /**
- * Numeric length setter for length property
- *
- * @param newLength new length to set
- */
- public final void setLength(final long newLength) {
- final ArrayData data = getArray();
- final long arrayLength = data.length();
- if (newLength == arrayLength) {
- return;
- }
-
- if (newLength > arrayLength) {
- setArray(data.ensure(newLength - 1).safeDelete(arrayLength, newLength - 1, false));
- return;
- }
-
- if (newLength < arrayLength) {
- long actualLength = newLength;
-
- // Check for numeric keys in property map and delete them or adjust length, depending on whether
- // they're defined as configurable. See ES5 #15.4.5.2
- if (getMap().containsArrayKeys()) {
-
- for (long l = arrayLength - 1; l >= newLength; l--) {
- final FindProperty find = findProperty(JSType.toString(l), false);
-
- if (find != null) {
-
- if (find.getProperty().isConfigurable()) {
- deleteOwnProperty(find.getProperty());
- } else {
- actualLength = l + 1;
- break;
- }
- }
- }
- }
-
- setArray(data.shrink(actualLength));
- data.setLength(actualLength);
- }
- }
-
- private int getInt(final int index, final Object key, final int programPoint) {
- if (isValidArrayIndex(index)) {
- for (ScriptObject object = this; ; ) {
- if (object.getMap().containsArrayKeys()) {
- final FindProperty find = object.findProperty(key, false);
-
- if (find != null) {
- return getIntValue(find, programPoint);
- }
- }
-
- if ((object = object.getProto()) == null) {
- break;
- }
-
- final ArrayData array = object.getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ?
- array.getIntOptimistic(index, programPoint) :
- array.getInt(index);
- }
- }
- } else {
- final FindProperty find = findProperty(key, true);
-
- if (find != null) {
- return getIntValue(find, programPoint);
- }
- }
-
- return JSType.toInt32(invokeNoSuchProperty(key, false, programPoint));
- }
-
- @Override
- public int getInt(final Object key, final int programPoint) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index);
- }
-
- return getInt(index, JSType.toPropertyKey(primitiveKey), programPoint);
- }
-
- @Override
- public int getInt(final double key, final int programPoint) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ? array.getIntOptimistic(index, programPoint) : array.getInt(index);
- }
-
- return getInt(index, JSType.toString(key), programPoint);
- }
-
- @Override
- public int getInt(final int key, final int programPoint) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ? array.getIntOptimistic(key, programPoint) : array.getInt(key);
- }
-
- return getInt(index, JSType.toString(key), programPoint);
- }
-
- private double getDouble(final int index, final Object key, final int programPoint) {
- if (isValidArrayIndex(index)) {
- for (ScriptObject object = this; ; ) {
- if (object.getMap().containsArrayKeys()) {
- final FindProperty find = object.findProperty(key, false);
- if (find != null) {
- return getDoubleValue(find, programPoint);
- }
- }
-
- if ((object = object.getProto()) == null) {
- break;
- }
-
- final ArrayData array = object.getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ?
- array.getDoubleOptimistic(index, programPoint) :
- array.getDouble(index);
- }
- }
- } else {
- final FindProperty find = findProperty(key, true);
-
- if (find != null) {
- return getDoubleValue(find, programPoint);
- }
- }
-
- return JSType.toNumber(invokeNoSuchProperty(key, false, INVALID_PROGRAM_POINT));
- }
-
- @Override
- public double getDouble(final Object key, final int programPoint) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index);
- }
-
- return getDouble(index, JSType.toPropertyKey(primitiveKey), programPoint);
- }
-
- @Override
- public double getDouble(final double key, final int programPoint) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ? array.getDoubleOptimistic(index, programPoint) : array.getDouble(index);
- }
-
- return getDouble(index, JSType.toString(key), programPoint);
- }
-
- @Override
- public double getDouble(final int key, final int programPoint) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return isValid(programPoint) ? array.getDoubleOptimistic(key, programPoint) : array.getDouble(key);
- }
-
- return getDouble(index, JSType.toString(key), programPoint);
- }
-
- private Object get(final int index, final Object key) {
- if (isValidArrayIndex(index)) {
- for (ScriptObject object = this; ; ) {
- if (object.getMap().containsArrayKeys()) {
- final FindProperty find = object.findProperty(key, false);
-
- if (find != null) {
- return find.getObjectValue();
- }
- }
-
- if ((object = object.getProto()) == null) {
- break;
- }
-
- final ArrayData array = object.getArray();
-
- if (array.has(index)) {
- return array.getObject(index);
- }
- }
- } else {
- final FindProperty find = findProperty(key, true);
-
- if (find != null) {
- return find.getObjectValue();
- }
- }
-
- return invokeNoSuchProperty(key, false, INVALID_PROGRAM_POINT);
- }
-
- @Override
- public Object get(final Object key) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return array.getObject(index);
- }
-
- return get(index, JSType.toPropertyKey(primitiveKey));
- }
-
- @Override
- public Object get(final double key) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return array.getObject(index);
- }
-
- return get(index, JSType.toString(key));
- }
-
- @Override
- public Object get(final int key) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- return array.getObject(index);
- }
-
- return get(index, JSType.toString(key));
- }
-
- private boolean doesNotHaveCheckArrayKeys(final long longIndex, final int value, final int callSiteFlags) {
- if (hasDefinedArrayProperties()) {
- final String key = JSType.toString(longIndex);
- final FindProperty find = findProperty(key, true);
- if (find != null) {
- setObject(find, callSiteFlags, key, value);
- return true;
- }
- }
- return false;
- }
-
- private boolean doesNotHaveCheckArrayKeys(final long longIndex, final double value, final int callSiteFlags) {
- if (hasDefinedArrayProperties()) {
- final String key = JSType.toString(longIndex);
- final FindProperty find = findProperty(key, true);
- if (find != null) {
- setObject(find, callSiteFlags, key, value);
- return true;
- }
- }
- return false;
- }
-
- private boolean doesNotHaveCheckArrayKeys(final long longIndex, final Object value, final int callSiteFlags) {
- if (hasDefinedArrayProperties()) {
- final String key = JSType.toString(longIndex);
- final FindProperty find = findProperty(key, true);
- if (find != null) {
- setObject(find, callSiteFlags, key, value);
- return true;
- }
- }
- return false;
- }
-
- private boolean hasDefinedArrayProperties() {
- for (ScriptObject obj = this; obj != null; obj = obj.getProto()) {
- if (obj.getMap().containsArrayKeys()) {
- return true;
- }
- }
- return false;
- }
-
- //value agnostic
- private boolean doesNotHaveEnsureLength(final long longIndex, final long oldLength, final int callSiteFlags) {
- if (longIndex >= oldLength) {
- if (!isExtensible()) {
- if (isStrictFlag(callSiteFlags)) {
- throw typeError("object.non.extensible", JSType.toString(longIndex), ScriptRuntime.safeToString(this));
- }
- return true;
- }
- setArray(getArray().ensure(longIndex));
- }
- return false;
- }
-
- private void doesNotHave(final int index, final int value, final int callSiteFlags) {
- final long oldLength = getArray().length();
- final long longIndex = ArrayIndex.toLongIndex(index);
- if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
- final boolean strict = isStrictFlag(callSiteFlags);
- setArray(getArray().set(index, value, strict).safeDelete(oldLength, longIndex - 1, strict));
- }
- }
-
- private void doesNotHave(final int index, final double value, final int callSiteFlags) {
- final long oldLength = getArray().length();
- final long longIndex = ArrayIndex.toLongIndex(index);
- if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
- final boolean strict = isStrictFlag(callSiteFlags);
- setArray(getArray().set(index, value, strict).safeDelete(oldLength, longIndex - 1, strict));
- }
- }
-
- private void doesNotHave(final int index, final Object value, final int callSiteFlags) {
- final long oldLength = getArray().length();
- final long longIndex = ArrayIndex.toLongIndex(index);
- if (!doesNotHaveCheckArrayKeys(longIndex, value, callSiteFlags) && !doesNotHaveEnsureLength(longIndex, oldLength, callSiteFlags)) {
- final boolean strict = isStrictFlag(callSiteFlags);
- setArray(getArray().set(index, value, strict).safeDelete(oldLength, longIndex - 1, strict));
- }
- }
-
- /**
- * This is the most generic of all Object setters. Most of the others use this in some form.
- * TODO: should be further specialized
- *
- * @param find found property
- * @param callSiteFlags callsite flags
- * @param key property key
- * @param value property value
- */
- public final void setObject(final FindProperty find, final int callSiteFlags, final Object key, final Object value) {
- FindProperty f = find;
-
- invalidateGlobalConstant(key);
-
- if (f != null && f.isInheritedOrdinaryProperty()) {
- final boolean isScope = isScopeFlag(callSiteFlags);
- // If the start object of the find is not this object it means the property was found inside a
- // 'with' statement expression (see WithObject.findProperty()). In this case we forward the 'set'
- // to the 'with' object.
- // Note that although a 'set' operation involving a with statement follows scope rules outside
- // the 'with' expression (the 'set' operation is performed on the owning prototype if it exists),
- // it follows non-scope rules inside the 'with' expression (set is performed on the top level object).
- // This is why we clear the callsite flags and FindProperty in the forward call to the 'with' object.
- if (isScope && f.getSelf() != this) {
- f.getSelf().setObject(null, 0, key, value);
- return;
- }
- // Setting a property should not modify the property in prototype unless this is a scope callsite
- // and the owner is a scope object as well (with the exception of 'with' statement handled above).
- if (!isScope || !f.getOwner().isScope()) {
- f = null;
- }
- }
-
- if (f != null) {
- if ((!f.getProperty().isWritable() && !NashornCallSiteDescriptor.isDeclaration(callSiteFlags)) || !f.getProperty().hasNativeSetter()) {
- if (isScopeFlag(callSiteFlags) && f.getProperty().isLexicalBinding()) {
- throw typeError("assign.constant", key.toString()); // Overwriting ES6 const should throw also in non-strict mode.
- }
- if (isStrictFlag(callSiteFlags)) {
- throw typeError(
- f.getProperty().isAccessorProperty() ? "property.has.no.setter" : "property.not.writable",
- key.toString(), ScriptRuntime.safeToString(this));
- }
- return;
- }
-
- if (NashornCallSiteDescriptor.isDeclaration(callSiteFlags) && f.getProperty().needsDeclaration()) {
- f.getOwner().declareAndSet(f, value);
- return;
- }
-
- f.setValue(value, isStrictFlag(callSiteFlags));
-
- } else if (!isExtensible()) {
- if (isStrictFlag(callSiteFlags)) {
- throw typeError("object.non.extensible", key.toString(), ScriptRuntime.safeToString(this));
- }
- } else {
- ScriptObject sobj = this;
- // undefined scope properties are set in the global object.
- if (isScope()) {
- while (sobj != null && !(sobj instanceof Global)) {
- sobj = sobj.getProto();
- }
- assert sobj != null : "no parent global object in scope";
- }
- //this will unbox any Number object to its primitive type in case the
- //property supports primitive types, so it doesn't matter that it comes
- //in as an Object.
- sobj.addSpillProperty(key, 0, value, true);
- }
- }
-
- @Override
- public void set(final Object key, final int value, final int callSiteFlags) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final Object propName = JSType.toPropertyKey(primitiveKey);
- setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
- }
-
- @Override
- public void set(final Object key, final double value, final int callSiteFlags) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final Object propName = JSType.toPropertyKey(primitiveKey);
- setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
- }
-
- @Override
- public void set(final Object key, final Object value, final int callSiteFlags) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final Object propName = JSType.toPropertyKey(primitiveKey);
- setObject(findProperty(propName, true), callSiteFlags, propName, value);
- }
-
- @Override
- public void set(final double key, final int value, final int callSiteFlags) {
- final int index = getArrayIndex(key);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final String propName = JSType.toString(key);
- setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
- }
-
- @Override
- public void set(final double key, final double value, final int callSiteFlags) {
- final int index = getArrayIndex(key);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final String propName = JSType.toString(key);
- setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
- }
-
- @Override
- public void set(final double key, final Object value, final int callSiteFlags) {
- final int index = getArrayIndex(key);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final String propName = JSType.toString(key);
- setObject(findProperty(propName, true), callSiteFlags, propName, value);
- }
-
- @Override
- public void set(final int key, final int value, final int callSiteFlags) {
- final int index = getArrayIndex(key);
- if (isValidArrayIndex(index)) {
- if (getArray().has(index)) {
- final ArrayData data = getArray();
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
- return;
- }
-
- final String propName = JSType.toString(key);
- setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
- }
-
- @Override
- public void set(final int key, final double value, final int callSiteFlags) {
- final int index = getArrayIndex(key);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final String propName = JSType.toString(key);
- setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
- }
-
- @Override
- public void set(final int key, final Object value, final int callSiteFlags) {
- final int index = getArrayIndex(key);
-
- if (isValidArrayIndex(index)) {
- final ArrayData data = getArray();
- if (data.has(index)) {
- setArray(data.set(index, value, isStrictFlag(callSiteFlags)));
- } else {
- doesNotHave(index, value, callSiteFlags);
- }
-
- return;
- }
-
- final String propName = JSType.toString(key);
- setObject(findProperty(propName, true), callSiteFlags, propName, value);
- }
-
- @Override
- public boolean has(final Object key) {
- final Object primitiveKey = JSType.toPrimitive(key);
- final int index = getArrayIndex(primitiveKey);
- return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toPropertyKey(primitiveKey), true);
- }
-
- @Override
- public boolean has(final double key) {
- final int index = getArrayIndex(key);
- return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
- }
-
- @Override
- public boolean has(final int key) {
- final int index = getArrayIndex(key);
- return isValidArrayIndex(index) ? hasArrayProperty(index) : hasProperty(JSType.toString(key), true);
- }
-
- private boolean hasArrayProperty(final int index) {
- boolean hasArrayKeys = false;
-
- for (ScriptObject self = this; self != null; self = self.getProto()) {
- if (self.getArray().has(index)) {
- return true;
- }
- hasArrayKeys = hasArrayKeys || self.getMap().containsArrayKeys();
- }
-
- return hasArrayKeys && hasProperty(ArrayIndex.toKey(index), true);
- }
-
- @Override
- public boolean hasOwnProperty(final Object key) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
- return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toPropertyKey(primitiveKey), false);
- }
-
- @Override
- public boolean hasOwnProperty(final int key) {
- final int index = getArrayIndex(key);
- return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
- }
-
- @Override
- public boolean hasOwnProperty(final double key) {
- final int index = getArrayIndex(key);
- return isValidArrayIndex(index) ? hasOwnArrayProperty(index) : hasProperty(JSType.toString(key), false);
- }
-
- private boolean hasOwnArrayProperty(final int index) {
- return getArray().has(index) || getMap().containsArrayKeys() && hasProperty(ArrayIndex.toKey(index), false);
- }
-
- @Override
- public boolean delete(final int key, final boolean strict) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- if (array.canDelete(index, strict)) {
- setArray(array.delete(index));
- return true;
- }
- return false;
- }
- return deleteObject(JSType.toObject(key), strict);
- }
-
- @Override
- public boolean delete(final double key, final boolean strict) {
- final int index = getArrayIndex(key);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- if (array.canDelete(index, strict)) {
- setArray(array.delete(index));
- return true;
- }
- return false;
- }
-
- return deleteObject(JSType.toObject(key), strict);
- }
-
- @Override
- public boolean delete(final Object key, final boolean strict) {
- final Object primitiveKey = JSType.toPrimitive(key, String.class);
- final int index = getArrayIndex(primitiveKey);
- final ArrayData array = getArray();
-
- if (array.has(index)) {
- if (array.canDelete(index, strict)) {
- setArray(array.delete(index));
- return true;
- }
- return false;
- }
-
- return deleteObject(primitiveKey, strict);
- }
-
- private boolean deleteObject(final Object key, final boolean strict) {
- final Object propName = JSType.toPropertyKey(key);
- final FindProperty find = findProperty(propName, false);
-
- if (find == null) {
- return true;
- }
-
- if (!find.getProperty().isConfigurable()) {
- if (strict) {
- throw typeError("cant.delete.property", propName.toString(), ScriptRuntime.safeToString(this));
- }
- return false;
- }
-
- final Property prop = find.getProperty();
- deleteOwnProperty(prop);
-
- return true;
- }
-
- /**
- * Return a shallow copy of this ScriptObject.
- * @return a shallow copy.
- */
- public final ScriptObject copy() {
- try {
- return clone();
- } catch (final CloneNotSupportedException e) {
- throw new RuntimeException(e);
- }
- }
-
- @Override
- protected ScriptObject clone() throws CloneNotSupportedException {
- final ScriptObject clone = (ScriptObject) super.clone();
- if (objectSpill != null) {
- clone.objectSpill = objectSpill.clone();
- if (primitiveSpill != null) {
- clone.primitiveSpill = primitiveSpill.clone();
- }
- }
- clone.arrayData = arrayData.copy();
- return clone;
- }
-
- /**
- * Make a new UserAccessorProperty property. getter and setter functions are stored in
- * this ScriptObject and slot values are used in property object.
- *
- * @param key the property name
- * @param propertyFlags attribute flags of the property
- * @param getter getter function for the property
- * @param setter setter function for the property
- * @return the newly created UserAccessorProperty
- */
- protected final UserAccessorProperty newUserAccessors(final Object key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
- final UserAccessorProperty uc = getMap().newUserAccessors(key, propertyFlags);
- //property.getSetter(Object.class, getMap());
- uc.setAccessors(this, getMap(), new UserAccessorProperty.Accessors(getter, setter));
- return uc;
- }
-
- /**
- * Returns {@code true} if properties for this object should use dual field mode, {@code false} otherwise.
- * @return {@code true} if dual fields should be used.
- */
- protected boolean useDualFields() {
- return !StructureLoader.isSingleFieldStructure(getClass().getName());
- }
-
- Object ensureSpillSize(final int slot) {
- final int oldLength = objectSpill == null ? 0 : objectSpill.length;
- if (slot < oldLength) {
- return this;
- }
- final int newLength = alignUp(slot + 1, SPILL_RATE);
- final Object[] newObjectSpill = new Object[newLength];
- final long[] newPrimitiveSpill = useDualFields() ? new long[newLength] : null;
-
- if (objectSpill != null) {
- System.arraycopy(objectSpill, 0, newObjectSpill, 0, oldLength);
- if (primitiveSpill != null && newPrimitiveSpill != null) {
- System.arraycopy(primitiveSpill, 0, newPrimitiveSpill, 0, oldLength);
- }
- }
-
- this.primitiveSpill = newPrimitiveSpill;
- this.objectSpill = newObjectSpill;
-
- return this;
- }
-
- private static MethodHandle findOwnMH_V(final String name, final Class rtype, final Class... types) {
- return MH.findVirtual(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types));
- }
-
- private static MethodHandle findOwnMH_S(final String name, final Class rtype, final Class... types) {
- return MH.findStatic(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types));
- }
-
- private static MethodHandle getKnownFunctionPropertyGuardSelf(final PropertyMap map, final MethodHandle getter, final ScriptFunction func) {
- return MH.insertArguments(KNOWNFUNCPROPGUARDSELF, 1, map, getter, func);
- }
-
- @SuppressWarnings("unused")
- private static boolean knownFunctionPropertyGuardSelf(final Object self, final PropertyMap map, final MethodHandle getter, final ScriptFunction func) {
- if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) {
- try {
- return getter.invokeExact(self) == func;
- } catch (final RuntimeException | Error e) {
- throw e;
- } catch (final Throwable t) {
- throw new RuntimeException(t);
- }
- }
-
- return false;
- }
-
- private static MethodHandle getKnownFunctionPropertyGuardProto(final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) {
- return MH.insertArguments(KNOWNFUNCPROPGUARDPROTO, 1, map, getter, depth, func);
- }
-
- private static ScriptObject getProto(final ScriptObject self, final int depth) {
- ScriptObject proto = self;
- for (int d = 0; d < depth; d++) {
- proto = proto.getProto();
- if (proto == null) {
- return null;
- }
- }
-
- return proto;
- }
-
- @SuppressWarnings("unused")
- private static boolean knownFunctionPropertyGuardProto(final Object self, final PropertyMap map, final MethodHandle getter, final int depth, final ScriptFunction func) {
- if (self instanceof ScriptObject && ((ScriptObject)self).getMap() == map) {
- final ScriptObject proto = getProto((ScriptObject)self, depth);
- if (proto == null) {
- return false;
- }
- try {
- return getter.invokeExact((Object)proto) == func;
- } catch (final RuntimeException | Error e) {
- throw e;
- } catch (final Throwable t) {
- throw new RuntimeException(t);
- }
- }
-
- return false;
- }
-
- /** This is updated only in debug mode - counts number of {@code ScriptObject} instances created */
- private static LongAdder count;
-
- static {
- if (Context.DEBUG) {
- count = new LongAdder();
- }
- }
- /**
- * Get number of {@code ScriptObject} instances created. If not running in debug
- * mode this is always 0
- *
- * @return number of ScriptObjects created
- */
- public static long getCount() {
- return count.longValue();
- }
-}