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 String 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 instanceof UserAccessorProperty) {
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 String 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 String key, final Object propertyDesc, final boolean reject) {
final Global global = Context.getGlobal();
final PropertyDescriptor desc = toPropertyDescriptor(global, propertyDesc);
final Object current = getOwnPropertyDescriptor(key);
final String name = JSType.toString(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", name, 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", name, 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", name, 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", name, 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", name, 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", name, 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));
doesNotHaveEnsureDelete(longIndex, oldLength, false);
}
setArray(getArray().set(index, value, false));
}
private void checkIntegerKey(final String 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 String 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 String key, final boolean deep) {
return findProperty(key, deep, 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 Whether the search should look up proto chain.
* @param start the object on which the lookup was originally initiated
*
* @return FindPropertyData or null if not found.
*/
protected FindProperty findProperty(final String key, final boolean deep, 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();
if (myProto != null) {
return myProto.findProperty(key, deep, start);
}
}
return null;
}
/**
* Low level property API. This is similar to {@link #findProperty(String, 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 String key, final boolean deep) {
if (getMap().findProperty(key) != null) {
return true;
}
if (deep) {
final ScriptObject myProto = getProto();
if (myProto != null) {
return myProto.hasProperty(key, deep);
}
}
return false;
}
private SwitchPoint findBuiltinSwitchPoint(final String 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 String 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 String 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 defined
// by user-defined accessors, we don't want to call the setter!!
if (!(property instanceof UserAccessorProperty)) {
assert property != null;
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"
*
* @param key property key
* @param propertyFlags 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
*/
protected final void initUserAccessors(final String key, final int propertyFlags, final ScriptFunction getter, final ScriptFunction setter) {
final PropertyMap oldMap = getMap();
final int slot = oldMap.getFreeSpillSlot();
ensureSpillSize(slot);
objectSpill[slot] = new UserAccessorProperty.Accessors(getter, setter);
Property newProperty;
PropertyMap newMap;
do {
newProperty = new UserAccessorProperty(key, propertyFlags, slot);
newMap = oldMap.addProperty(newProperty);
} while (!compareAndSetMap(oldMap, newMap));
}
/**
* 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) {
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 String key, final ScriptFunction getter, final ScriptFunction setter) {
final Property oldProperty = getMap().findProperty(key);
if (oldProperty instanceof UserAccessorProperty) {
modifyOwnProperty(oldProperty, oldProperty.getFlags(), getter, setter);
} else {
addOwnProperty(newUserAccessors(key, 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 long getLongValue(final FindProperty find, final int programPoint) {
final MethodHandle getter = find.getGetter(long.class, programPoint, null);
if (getter != null) {
try {
return (long)getter.invokeExact((Object)find.getGetterReceiver());
} catch (final Error|RuntimeException e) {
throw e;
} catch (final Throwable e) {
throw new RuntimeException(e);
}
}
return UNDEFINED_LONG;
}
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 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.
*/
protected 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) {
assert n > 0;
ScriptObject p = getProto();
for (int i = n; i-- > 0;) {
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 protototype has changed and set our map
final PropertyListeners listeners = getMap().getListeners();
if (listeners != null) {
listeners.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 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(all, null);
}
/**
* return an array of own property keys associated with the object.
*
* @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.
*/
protected String[] getOwnKeys(final boolean all, final Set nonEnumerable) {
final List keys = new ArrayList<>();
final PropertyMap selfMap = this.getMap();
final ArrayData array = getArray();
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 String key = property.getKey();
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(key);
}
}
}
return keys.toArray(new String[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 instace 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();
}
/**
* Flag this ScriptObject as scope
*/
public final void setIsScope() {
if (Context.DEBUG) {
scopeCount++;
}
flags |= IS_SCOPE;
}
/**
* Check whether this ScriptObject is scope
* @return true if scope
*/
public final boolean isScope() {
return (flags & IS_SCOPE) != 0;
}
/**
* 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;
}
/**
* 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) {
final int c = desc.getNameTokenCount();
// JavaScript is "immune" to all currently defined Dynalink composite operation - getProp is the same as getElem
// is the same as getMethod as JavaScript objects have a single namespace for all three. Therefore, we don't
// care about them, and just link to whatever is the first operation.
final String operator = CallSiteDescriptorFactory.tokenizeOperators(desc).get(0);
// NOTE: we support getElem and setItem as JavaScript doesn't distinguish items from properties. Nashorn itself
// emits "dyn:getProp:identifier" for "." and "dyn:getElem" 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 (operator) {
case "getProp":
case "getElem":
case "getMethod":
return c > 2 ? findGetMethod(desc, request, operator) : findGetIndexMethod(desc, request);
case "setProp":
case "setElem":
return c > 2 ? findSetMethod(desc, request) : findSetIndexMethod(desc, request);
case "call":
return findCallMethod(desc, request);
case "new":
return findNewMethod(desc, request);
case "callMethod":
return findCallMethodMethod(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();
}
/**
* 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 invoed at call site.
*/
protected GuardedInvocation findCallMethod(final CallSiteDescriptor desc, final LinkRequest request) {
return notAFunction();
}
private GuardedInvocation notAFunction() {
throw typeError("not.a.function", ScriptRuntime.safeToString(this));
}
/**
* Find an implementation for a "dyn:callMethod" operation. Note that Nashorn internally never uses
* "dyn:callMethod", but instead always emits two call sites in bytecode, one for "dyn:getMethod", and then another
* one for "dyn:call". Explicit support for "dyn:callMethod" is provided for the benefit of potential external
* callers. The implementation itself actually folds a "dyn:getMethod" method handle into a "dyn:call" method handle.
*
* @param desc the call site descriptor.
* @param request the link request
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findCallMethodMethod(final CallSiteDescriptor desc, final LinkRequest request) {
// R(P0, P1, ...)
final MethodType callType = desc.getMethodType();
// use type Object(P0) for the getter
final CallSiteDescriptor getterType = desc.changeMethodType(MethodType.methodType(Object.class, callType.parameterType(0)));
final GuardedInvocation getter = findGetMethod(getterType, request, "getMethod");
// Object(P0) => Object(P0, P1, ...)
final MethodHandle argDroppingGetter = MH.dropArguments(getter.getInvocation(), 1, callType.parameterList().subList(1, callType.parameterCount()));
// R(Object, P0, P1, ...)
final MethodHandle invoker = Bootstrap.createDynamicInvoker("dyn:call", callType.insertParameterTypes(0, argDroppingGetter.type().returnType()));
// Fold Object(P0, P1, ...) into R(Object, P0, P1, ...) => R(P0, P1, ...)
return getter.replaceMethods(MH.foldArguments(invoker, argDroppingGetter), getter.getGuard());
}
/**
* Test whether this object contains in its prototype chain or is itself a with-object.
* @return true if a with-object was found
*/
final boolean hasWithScope() {
if (isScope()) {
for (ScriptObject obj = this; obj != null; obj = obj.getProto()) {
if (obj instanceof WithObject) {
return true;
}
}
}
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
* @param operator operator for get: getProp, getMethod, getElem etc
*
* @return GuardedInvocation to be invoked at call site.
*/
protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
final boolean explicitInstanceOfCheck = explicitInstanceOfCheck(desc, request);
String name;
name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
if (NashornCallSiteDescriptor.isApplyToCall(desc)) {
if (Global.isBuiltinFunctionPrototypeApply()) {
name = "call";
}
}
if (request.isCallSiteUnstable() || hasWithScope()) {
return findMegaMorphicGetMethod(desc, name, "getMethod".equals(operator));
}
final FindProperty find = findProperty(name, true);
MethodHandle mh;
if (find == null) {
switch (operator) {
case "getElem": // getElem only gets here if element name is constant, so treat it like a property access
case "getProp":
return noSuchProperty(desc, request);
case "getMethod":
return noSuchMethod(desc, request);
default:
throw new AssertionError(operator); // never invoked with any other operation
}
}
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 protoSwitchPoint;
if (mh == null) {
mh = Lookup.emptyGetter(returnType);
protoSwitchPoint = getProtoSwitchPoint(name, owner);
} else if (!find.isSelf()) {
assert mh.type().returnType().equals(returnType) :
"return type mismatch for getter " + mh.type().returnType() + " != " + returnType;
if (!(property instanceof UserAccessorProperty)) {
// Add a filter that replaces the self object with the prototype owning the property.
mh = addProtoFilter(mh, find.getProtoChainLength());
}
protoSwitchPoint = getProtoSwitchPoint(name, owner);
} else {
protoSwitchPoint = null;
}
final GuardedInvocation inv = new GuardedInvocation(mh, guard, protoSwitchPoint, 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);
final MethodHandle guard = getScriptObjectGuard(desc.getMethodType(), true);
return new GuardedInvocation(invoker, guard);
}
@SuppressWarnings("unused")
private Object megamorphicGet(final String key, final boolean isMethod) {
final FindProperty find = findProperty(key, true);
if (find != null) {
return find.getObjectValue();
}
return isMethod ? getNoSuchMethod(key, INVALID_PROGRAM_POINT) : invokeNoSuchProperty(key, 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) {
final PropertyMap oldMap = getMap();
final FindProperty find = findProperty(key, false);
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(key, value, 0);
}
/**
* 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
*/
protected MethodHandle findGetIndexMethodHandle(final Class returnType, final String name, final Class elementType, final CallSiteDescriptor desc) {
if (!returnType.isPrimitive()) {
return findOwnMH_V(getClass(), name, returnType, elementType);
}
return MH.insertArguments(
findOwnMH_V(getClass(), name, returnType, elementType, int.class),
2,
NashornCallSiteDescriptor.isOptimistic(desc) ?
NashornCallSiteDescriptor.getProgramPoint(desc) :
INVALID_PROGRAM_POINT);
}
/**
* Get a switch point 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 a SwitchPoint or null
*/
public final SwitchPoint getProtoSwitchPoint(final String name, final ScriptObject owner) {
if (owner == this || getProto() == null) {
return null;
}
for (ScriptObject obj = this; obj != owner && obj.getProto() != null; obj = obj.getProto()) {
final ScriptObject parent = obj.getProto();
parent.getMap().addListener(name, obj.getMap());
}
return getMap().getSwitchPoint(name);
}
/**
* 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 = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
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, 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.isInherited() && !(find.getProperty() instanceof UserAccessorProperty)) {
// 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 property
return createEmptySetMethod(desc, explicitInstanceOfCheck, "property.not.writable", 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 = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
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),
getProtoSwitchPoint(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 GuardedInvocation findMegaMorphicSetMethod(final CallSiteDescriptor desc, final String name) {
final MethodType type = desc.getMethodType().insertParameterTypes(1, Object.class);
//never bother with ClassCastExceptionGuard for megamorphic callsites
final GuardedInvocation inv = findSetIndexMethod(getClass(), 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(getClass(), desc, explicitInstanceOfCheck(desc, request), desc.getMethodType());
}
/**
* Find the appropriate SETINDEX method for an invoke dynamic call.
*
* @param clazz the receiver class
* @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 Class clazz, 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(clazz, "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 = desc.getNameToken(2);
final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
final boolean scopeCall = isScope() && NashornCallSiteDescriptor.isScope(desc);
if (find == null) {
return noSuchProperty(desc, request);
}
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.makeBoundFunction(thiz, new Object[] { name })),
0,
Object.class),
NashornGuards.combineGuards(
NashornGuards.getIdentityGuard(this),
NashornGuards.getMapGuard(getMap(), true)));
}
/**
* 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 = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
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),
getProtoSwitchPoint(NO_SUCH_PROPERTY_NAME, find.getOwner()),
//TODO this doesn't need a ClassCastException as guard always checks script object
null);
}
}
if (scopeAccess) {
throw referenceError("not.defined", name);
}
return createEmptyGetter(desc, explicitInstanceOfCheck(desc, request), name);
}
/**
* Invoke fall back if a property is not found.
* @param name Name of property.
* @param programPoint program point
* @return Result from call.
*/
protected Object invokeNoSuchProperty(final String name, final int programPoint) {
final FindProperty find = findProperty(NO_SUCH_PROPERTY_NAME, true);
Object ret = UNDEFINED;
if (find != null) {
final Object func = find.getObjectValue();
if (func instanceof ScriptFunction) {
ret = ScriptRuntime.apply((ScriptFunction)func, this, name);
}
}
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
* @return the bound function, or undefined
*/
private Object getNoSuchMethod(final String name, final int programPoint) {
final FindProperty find = findProperty(NO_SUCH_METHOD_NAME, true);
if (find == null) {
return invokeNoSuchProperty(name, programPoint);
}
final Object value = find.getObjectValue();
if (!(value instanceof ScriptFunction)) {
return UNDEFINED;
}
return ((ScriptFunction)value).makeBoundFunction(this, 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), getProtoSwitchPoint(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(false, nonEnumerable)));
}
this.values = keys.toArray(new String[keys.size()]);
}
}
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(false, nonEnumerable)) {
valueList.add(self.get(key));
}
}
this.values = valueList.toArray(new Object[valueList.size()]);
}
}
/**
* Add a spill property for the given key.
* @param key Property key.
* @param flags Property flags.
* @return Added property.
*/
private Property addSpillProperty(final String 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) {
ArrayData data = getArray();
final long arrayLength = data.length();
if (newLength == arrayLength) {
return;
}
if (newLength > arrayLength) {
data = data.ensure(newLength - 1);
if (data.canDelete(arrayLength, newLength - 1, false)) {
data = data.delete(arrayLength, newLength - 1);
}
setArray(data);
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 String key, final int programPoint) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, this);
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, 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.toString(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 long 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 long getLong(final int index, final String key, final int programPoint) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, this);
if (find != null) {
return getLongValue(find, programPoint);
}
}
if ((object = object.getProto()) == null) {
break;
}
final ArrayData array = object.getArray();
if (array.has(index)) {
return isValid(programPoint) ?
array.getLongOptimistic(index, programPoint) :
array.getLong(index);
}
}
} else {
final FindProperty find = findProperty(key, true);
if (find != null) {
return getLongValue(find, programPoint);
}
}
return JSType.toLong(invokeNoSuchProperty(key, programPoint));
}
@Override
public long getLong(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.getLongOptimistic(index, programPoint) : array.getLong(index);
}
return getLong(index, JSType.toString(primitiveKey), programPoint);
}
@Override
public long getLong(final double key, final int programPoint) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index);
}
return getLong(index, JSType.toString(key), programPoint);
}
@Override
public long getLong(final long key, final int programPoint) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return isValid(programPoint) ? array.getLongOptimistic(index, programPoint) : array.getLong(index);
}
return getLong(index, JSType.toString(key), programPoint);
}
@Override
public long getLong(final int key, final int programPoint) {
final int index = getArrayIndex(key);
final ArrayData array = getArray();
if (array.has(index)) {
return isValid(programPoint) ? array.getLongOptimistic(key, programPoint) : array.getLong(key);
}
return getLong(index, JSType.toString(key), programPoint);
}
private double getDouble(final int index, final String key, final int programPoint) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, this);
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, 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.toString(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 long 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 String key) {
if (isValidArrayIndex(index)) {
for (ScriptObject object = this; ; ) {
if (object.getMap().containsArrayKeys()) {
final FindProperty find = object.findProperty(key, false, this);
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, 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.toString(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 long 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 (getMap().containsArrayKeys()) {
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 long value, final int callSiteFlags) {
if (getMap().containsArrayKeys()) {
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 (getMap().containsArrayKeys()) {
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 (getMap().containsArrayKeys()) {
final String key = JSType.toString(longIndex);
final FindProperty find = findProperty(key, true);
if (find != null) {
setObject(find, callSiteFlags, key, value);
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 doesNotHaveEnsureDelete(final long longIndex, final long oldLength, final boolean strict) {
if (longIndex > oldLength) {
ArrayData array = getArray();
if (array.canDelete(oldLength, longIndex - 1, strict)) {
array = array.delete(oldLength, longIndex - 1);
}
setArray(array);
}
}
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));
doesNotHaveEnsureDelete(longIndex, oldLength, strict);
}
}
private void doesNotHave(final int index, final long 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));
doesNotHaveEnsureDelete(longIndex, oldLength, 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));
doesNotHaveEnsureDelete(longIndex, oldLength, 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));
doesNotHaveEnsureDelete(longIndex, oldLength, 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 String key, final Object value) {
FindProperty f = find;
invalidateGlobalConstant(key);
if (f != null && f.isInherited() && !(f.getProperty() instanceof UserAccessorProperty)) {
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()) {
if (isScopeFlag(callSiteFlags) && f.getProperty().isLexicalBinding()) {
throw typeError("assign.constant", key); // Overwriting ES6 const should throw also in non-strict mode.
}
if (isStrictFlag(callSiteFlags)) {
throw typeError("property.not.writable", key, ScriptRuntime.safeToString(this));
}
return;
}
f.setValue(value, isStrictFlag(callSiteFlags));
} else if (!isExtensible()) {
if (isStrictFlag(callSiteFlags)) {
throw typeError("object.non.extensible", key, 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 String propName = JSType.toString(primitiveKey);
setObject(findProperty(propName, true), callSiteFlags, propName, JSType.toObject(value));
}
@Override
public void set(final Object key, final long 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 String propName = JSType.toString(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 String propName = JSType.toString(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 String propName = JSType.toString(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 long 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 long 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 long key, final long 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 long 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 long 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 long 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 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.toString(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 long 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.toString(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 long 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 long 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 String propName = JSType.toString(key);
final FindProperty find = findProperty(propName, false);
if (find == null) {
return true;
}
if (!find.getProperty().isConfigurable()) {
if (strict) {
throw typeError("cant.delete.property", propName, 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 String 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 Class clazz, final String name, final Class rtype, final Class... types) {
// TODO: figure out how can it work for NativeArray$Prototype etc.
return MH.findVirtual(MethodHandles.lookup(), ScriptObject.class, name, MH.type(rtype, types));
}
private static MethodHandle findOwnMH_V(final String name, final Class rtype, final Class... types) {
return findOwnMH_V(ScriptObject.class, name, 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 int count;
/** This is updated only in debug mode - counts number of {@code ScriptObject} instances created that are scope */
private static int scopeCount;
/**
* Get number of {@code ScriptObject} instances created. If not running in debug
* mode this is always 0
*
* @return number of ScriptObjects created
*/
public static int getCount() {
return count;
}
/**
* Get number of scope {@code ScriptObject} instances created. If not running in debug
* mode this is always 0
*
* @return number of scope ScriptObjects created
*/
public static int getScopeCount() {
return scopeCount;
}
}