--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/ScriptFunctionImpl.java Thu Sep 10 14:55:18 2015 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,313 +0,0 @@
-/*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package jdk.nashorn.internal.objects;
-
-import static jdk.nashorn.internal.lookup.Lookup.MH;
-import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
-
-import java.lang.invoke.MethodHandle;
-import java.util.ArrayList;
-import jdk.nashorn.internal.runtime.AccessorProperty;
-import jdk.nashorn.internal.runtime.GlobalFunctions;
-import jdk.nashorn.internal.runtime.Property;
-import jdk.nashorn.internal.runtime.PropertyMap;
-import jdk.nashorn.internal.runtime.RecompilableScriptFunctionData;
-import jdk.nashorn.internal.runtime.ScriptFunction;
-import jdk.nashorn.internal.runtime.ScriptFunctionData;
-import jdk.nashorn.internal.runtime.ScriptObject;
-import jdk.nashorn.internal.runtime.Specialization;
-
-/**
- * Concrete implementation of ScriptFunction. This sets correct map for the
- * function objects -- to expose properties like "prototype", "length" etc.
- */
-public class ScriptFunctionImpl extends ScriptFunction {
-
- /** Reference to constructor prototype. */
- private Object prototype;
-
- // property map for strict mode functions
- private static final PropertyMap strictmodemap$;
- // property map for bound functions
- private static final PropertyMap boundfunctionmap$;
- // property map for non-strict, non-bound functions.
- private static final PropertyMap map$;
-
- // Marker object for lazily initialized prototype object
- private static final Object LAZY_PROTOTYPE = new Object();
-
- private ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final Specialization[] specs, final Global global) {
- super(name, invokeHandle, map$, null, specs, ScriptFunctionData.IS_BUILTIN_CONSTRUCTOR);
- init(global);
- }
-
- /**
- * Constructor called by Nasgen generated code, no membercount, use the default map.
- * Creates builtin functions only.
- *
- * @param name name of function
- * @param invokeHandle handle for invocation
- * @param specs specialized versions of this method, if available, null otherwise
- */
- ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final Specialization[] specs) {
- this(name, invokeHandle, specs, Global.instance());
- }
-
- private ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final PropertyMap map, final Specialization[] specs, final Global global) {
- super(name, invokeHandle, map.addAll(map$), null, specs, ScriptFunctionData.IS_BUILTIN_CONSTRUCTOR);
- init(global);
- }
-
- /**
- * Constructor called by Nasgen generated code, no membercount, use the map passed as argument.
- * Creates builtin functions only.
- *
- * @param name name of function
- * @param invokeHandle handle for invocation
- * @param map initial property map
- * @param specs specialized versions of this method, if available, null otherwise
- */
- ScriptFunctionImpl(final String name, final MethodHandle invokeHandle, final PropertyMap map, final Specialization[] specs) {
- this(name, invokeHandle, map, specs, Global.instance());
- }
-
- private ScriptFunctionImpl(final String name, final MethodHandle methodHandle, final ScriptObject scope, final Specialization[] specs, final int flags, final Global global) {
- super(name, methodHandle, getMap(isStrict(flags)), scope, specs, flags);
- init(global);
- }
-
- /**
- * Constructor called by Global.newScriptFunction (runtime).
- *
- * @param name name of function
- * @param methodHandle handle for invocation
- * @param scope scope object
- * @param specs specialized versions of this method, if available, null otherwise
- * @param flags {@link ScriptFunctionData} flags
- */
- ScriptFunctionImpl(final String name, final MethodHandle methodHandle, final ScriptObject scope, final Specialization[] specs, final int flags) {
- this(name, methodHandle, scope, specs, flags, Global.instance());
- }
-
- private ScriptFunctionImpl(final RecompilableScriptFunctionData data, final ScriptObject scope, final Global global) {
- super(data, getMap(data.isStrict()), scope);
- init(global);
- }
-
- /**
- * Factory method called by compiler generated code for functions that need parent scope.
- *
- * @param constants the generated class' constant array
- * @param index the index of the {@code RecompilableScriptFunctionData} object in the constants array.
- * @param scope the parent scope object
- * @return a newly created function object
- */
- public static ScriptFunction create(final Object[] constants, final int index, final ScriptObject scope) {
- return new ScriptFunctionImpl((RecompilableScriptFunctionData)constants[index], scope, Global.instance());
- }
-
- /**
- * Factory method called by compiler generated code for functions that don't need parent scope.
- *
- * @param constants the generated class' constant array
- * @param index the index of the {@code RecompilableScriptFunctionData} object in the constants array.
- * @return a newly created function object
- */
- public static ScriptFunction create(final Object[] constants, final int index) {
- return create(constants, index, null);
- }
-
- /**
- * Only invoked internally from {@link BoundScriptFunctionImpl} constructor.
- * @param data the script function data for the bound function.
- * @param global the global object
- */
- ScriptFunctionImpl(final ScriptFunctionData data, final Global global) {
- super(data, boundfunctionmap$, null);
- init(global);
- }
-
- static {
- final ArrayList<Property> properties = new ArrayList<>(3);
- properties.add(AccessorProperty.create("prototype", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE, G$PROTOTYPE, S$PROTOTYPE));
- properties.add(AccessorProperty.create("length", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE | Property.NOT_WRITABLE, G$LENGTH, null));
- properties.add(AccessorProperty.create("name", Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE | Property.NOT_WRITABLE, G$NAME, null));
- map$ = PropertyMap.newMap(properties);
- strictmodemap$ = createStrictModeMap(map$);
- boundfunctionmap$ = createBoundFunctionMap(strictmodemap$);
- }
-
- private static PropertyMap createStrictModeMap(final PropertyMap map) {
- final int flags = Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE;
- PropertyMap newMap = map;
- // Need to add properties directly to map since slots are assigned speculatively by newUserAccessors.
- newMap = newMap.addPropertyNoHistory(map.newUserAccessors("arguments", flags));
- newMap = newMap.addPropertyNoHistory(map.newUserAccessors("caller", flags));
- return newMap;
- }
-
- private static boolean isStrict(final int flags) {
- return (flags & ScriptFunctionData.IS_STRICT) != 0;
- }
-
- // Choose the map based on strict mode!
- private static PropertyMap getMap(final boolean strict) {
- return strict ? strictmodemap$ : map$;
- }
-
- private static PropertyMap createBoundFunctionMap(final PropertyMap strictModeMap) {
- // Bound function map is same as strict function map, but additionally lacks the "prototype" property, see
- // ECMAScript 5.1 section 15.3.4.5
- return strictModeMap.deleteProperty(strictModeMap.findProperty("prototype"));
- }
-
- // Instance of this class is used as global anonymous function which
- // serves as Function.prototype object.
- private static class AnonymousFunction extends ScriptFunctionImpl {
- private static final PropertyMap anonmap$ = PropertyMap.newMap();
-
- AnonymousFunction() {
- super("", GlobalFunctions.ANONYMOUS, anonmap$, null);
- }
- }
-
- static ScriptFunctionImpl newAnonymousFunction() {
- return new AnonymousFunction();
- }
-
- private static ScriptFunction makeFunction(final String name, final MethodHandle methodHandle, final Specialization[] specs, final int flags) {
- final ScriptFunctionImpl func = new ScriptFunctionImpl(name, methodHandle, null, specs, flags);
- func.setPrototype(UNDEFINED);
- // Non-constructor built-in functions do not have "prototype" property
- func.deleteOwnProperty(func.getMap().findProperty("prototype"));
-
- return func;
- }
-
- /**
- * Factory method for non-constructor built-in functions
- *
- * @param name function name
- * @param methodHandle handle for invocation
- * @param specs specialized versions of function if available, null otherwise
- * @return new ScriptFunction
- */
- static ScriptFunction makeFunction(final String name, final MethodHandle methodHandle, final Specialization[] specs) {
- return makeFunction(name, methodHandle, specs, ScriptFunctionData.IS_BUILTIN);
- }
-
- /**
- * Factory method for non-constructor built-in, strict functions
- *
- * @param name function name
- * @param methodHandle handle for invocation
- * @return new ScriptFunction
- */
- static ScriptFunction makeStrictFunction(final String name, final MethodHandle methodHandle) {
- return makeFunction(name, methodHandle, null, ScriptFunctionData.IS_BUILTIN | ScriptFunctionData.IS_STRICT );
- }
-
- /**
- * Factory method for non-constructor built-in functions
- *
- * @param name function name
- * @param methodHandle handle for invocation
- * @return new ScriptFunction
- */
- static ScriptFunction makeFunction(final String name, final MethodHandle methodHandle) {
- return makeFunction(name, methodHandle, null);
- }
-
- @Override
- public ScriptFunction makeSynchronizedFunction(final Object sync) {
- final MethodHandle mh = MH.insertArguments(ScriptFunction.INVOKE_SYNC, 0, this, sync);
- return makeFunction(getName(), mh);
- }
-
- /**
- * Same as {@link ScriptFunction#makeBoundFunction(Object, Object[])}. The only reason we override it is so that we
- * can expose it.
- * @param self the self to bind to this function. Can be null (in which case, null is bound as this).
- * @param args additional arguments to bind to this function. Can be null or empty to not bind additional arguments.
- * @return a function with the specified self and parameters bound.
- */
- @Override
- public ScriptFunction makeBoundFunction(final Object self, final Object[] args) {
- return super.makeBoundFunction(self, args);
- }
-
- /**
- * This method is used to create a bound function based on this function.
- *
- * @param data the {@code ScriptFunctionData} specifying the functions immutable portion.
- * @return a function initialized from the specified data. Its parent scope will be set to null, therefore the
- * passed in data should not expect a callee.
- */
- @Override
- protected ScriptFunction makeBoundFunction(final ScriptFunctionData data) {
- return new BoundScriptFunctionImpl(data, getTargetFunction());
- }
-
- // return Object.prototype - used by "allocate"
- @Override
- protected final ScriptObject getObjectPrototype() {
- return Global.objectPrototype();
- }
-
- @Override
- public final Object getPrototype() {
- if (prototype == LAZY_PROTOTYPE) {
- prototype = new PrototypeObject(this);
- }
- return prototype;
- }
-
- @Override
- public final void setPrototype(final Object newProto) {
- if (newProto instanceof ScriptObject && newProto != this.prototype && allocatorMap != null) {
- // Replace our current allocator map with one that is associated with the new prototype.
- allocatorMap = allocatorMap.changeProto((ScriptObject)newProto);
- }
- this.prototype = newProto;
- }
-
- // Internals below..
- private void init(final Global global) {
- this.setInitialProto(global.getFunctionPrototype());
- this.prototype = LAZY_PROTOTYPE;
-
- // We have to fill user accessor functions late as these are stored
- // in this object rather than in the PropertyMap of this object.
- assert objectSpill == null;
- final ScriptFunction typeErrorThrower = global.getTypeErrorThrower();
- if (findProperty("arguments", true) != null) {
- initUserAccessors("arguments", Property.NOT_CONFIGURABLE | Property.NOT_ENUMERABLE, typeErrorThrower, typeErrorThrower);
- }
- if (findProperty("caller", true) != null) {
- initUserAccessors("caller", Property.NOT_CONFIGURABLE | Property.NOT_ENUMERABLE, typeErrorThrower, typeErrorThrower);
- }
- }
-}