jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/objects/Global.java@8f2ed41abb26 (annotated)

src/jdk/nashorn/internal/objects/Global.java@8f2ed41abb26 (annotated)

src/jdk/nashorn/internal/objects/Global.java

Wed, 20 Aug 2014 18:59:11 +0530

author: sundar
date: Wed, 20 Aug 2014 18:59:11 +0530
changeset 964: 8f2ed41abb26
parent 963: e2497b11a021
child 1006: e94bfa3c6c6c
permissions: -rw-r--r--

8050078: Nashorn ClassFilter Support
Reviewed-by: attila, hannesw, jlaskey, lagergren

 /*
  * 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.codegen.CompilerConstants.staticCall;
 import static jdk.nashorn.internal.lookup.Lookup.MH;
 import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.lang.invoke.CallSite;
 import java.lang.invoke.ConstantCallSite;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.lang.invoke.SwitchPoint;
 import java.lang.reflect.Field;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicReference;
 import javax.script.ScriptContext;
 import javax.script.ScriptEngine;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.linker.LinkRequest;
 import jdk.nashorn.api.scripting.ClassFilter;
 import jdk.nashorn.api.scripting.ScriptObjectMirror;
 import jdk.nashorn.internal.codegen.ApplySpecialization;
 import jdk.nashorn.internal.codegen.CompilerConstants.Call;
 import jdk.nashorn.internal.lookup.Lookup;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.runtime.ConsString;
 import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.GlobalConstants;
 import jdk.nashorn.internal.runtime.GlobalFunctions;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.NativeJavaPackage;
 import jdk.nashorn.internal.runtime.PropertyDescriptor;
 import jdk.nashorn.internal.runtime.PropertyMap;
 import jdk.nashorn.internal.runtime.Scope;
 import jdk.nashorn.internal.runtime.ScriptEnvironment;
 import jdk.nashorn.internal.runtime.ScriptFunction;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.ScriptRuntime;
 import jdk.nashorn.internal.runtime.ScriptingFunctions;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 import jdk.nashorn.internal.runtime.linker.Bootstrap;
 import jdk.nashorn.internal.runtime.linker.InvokeByName;
 import jdk.nashorn.internal.runtime.regexp.RegExpResult;
 import jdk.nashorn.internal.scripts.JO;
 /**
  * Representation of global scope.
  */
 @ScriptClass("Global")
 public final class Global extends ScriptObject implements Scope {
     // Placeholder value used in place of a location property (__FILE__, __DIR__, __LINE__)
     private static final Object LOCATION_PROPERTY_PLACEHOLDER = new Object();
     private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
     private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
     /**
      * Optimistic builtin names that require switchpoint invalidation
      * upon assignment. Overly conservative, but works for now, to avoid
      * any complicated scope checks and especially heavy weight guards
      * like
      *
      * <pre>
      *     public boolean setterGuard(final Object receiver) {
      *         final Global          global = Global.instance();
      *         final ScriptObject    sobj   = global.getFunctionPrototype();
      *         final Object          apply  = sobj.get("apply");
      *         return apply == receiver;
      *     }
      * </pre>
      *
      * Naturally, checking for builtin classes like NativeFunction is cheaper,
      * it's when you start adding property checks for said builtins you have
      * problems with guard speed.
      */
     public final Map<String, SwitchPoint> optimisticFunctionMap;
     /** Name invalidator for things like call/apply */
     public static final Call BOOTSTRAP = staticCall(MethodHandles.lookup(), Global.class, "invalidateNameBootstrap", CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class);
     /** Nashorn extension: arguments array */
     @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
     public Object arguments;
     /** ECMA 15.1.2.2 parseInt (string , radix) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object parseInt;
     /** ECMA 15.1.2.3 parseFloat (string) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object parseFloat;
     /** ECMA 15.1.2.4 isNaN (number) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object isNaN;
     /** ECMA 15.1.2.5 isFinite (number) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object isFinite;
     /** ECMA 15.1.3.3 encodeURI */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object encodeURI;
     /** ECMA 15.1.3.4 encodeURIComponent */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object encodeURIComponent;
     /** ECMA 15.1.3.1 decodeURI */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object decodeURI;
     /** ECMA 15.1.3.2 decodeURIComponent */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object decodeURIComponent;
     /** ECMA B.2.1 escape (string) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object escape;
     /** ECMA B.2.2 unescape (string) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object unescape;
     /** Nashorn extension: global.print */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object print;
     /** Nashorn extension: global.load */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object load;
     /** Nashorn extension: global.loadWithNewGlobal */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object loadWithNewGlobal;
     /** Nashorn extension: global.exit */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object exit;
     /** Nashorn extension: global.quit */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object quit;
     /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
     @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final double NaN = Double.NaN;
     /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
     @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final double Infinity = Double.POSITIVE_INFINITY;
     /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
     @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object undefined = UNDEFINED;
     /** ECMA 15.1.2.1 eval(x) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public Object eval;
     /** ECMA 15.1.4.1 Object constructor. */
     @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object object;
     /** ECMA 15.1.4.2 Function constructor. */
     @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object function;
     /** ECMA 15.1.4.3 Array constructor. */
     @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object array;
     /** ECMA 15.1.4.4 String constructor */
     @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object string;
     /** ECMA 15.1.4.5 Boolean constructor */
     @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object _boolean;
     /** ECMA 15.1.4.6 - Number constructor */
     @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object number;
     /** ECMA 15.1.4.7 Date constructor */
     @Property(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object date;
     /** ECMA 15.1.4.8 RegExp constructor */
     @Property(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object regexp;
     /** ECMA 15.12 - The JSON object */
     @Property(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object json;
     /** Nashorn extension: global.JSAdapter */
     @Property(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object jsadapter;
     /** ECMA 15.8 - The Math object */
     @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object math;
     /** Error object */
     @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object error;
     /** EvalError object */
     @Property(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object evalError;
     /** RangeError object */
     @Property(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object rangeError;
     /** ReferenceError object */
     @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object referenceError;
     /** SyntaxError object */
     @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object syntaxError;
     /** TypeError object */
     @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object typeError;
     /** URIError object */
     @Property(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uriError;
     /** ArrayBuffer object */
     @Property(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object arrayBuffer;
     /** DataView object */
     @Property(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object dataView;
     /** TypedArray (int8) */
     @Property(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object int8Array;
     /** TypedArray (uint8) */
     @Property(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint8Array;
     /** TypedArray (uint8) - Clamped */
     @Property(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint8ClampedArray;
     /** TypedArray (int16) */
     @Property(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object int16Array;
     /** TypedArray (uint16) */
     @Property(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint16Array;
     /** TypedArray (int32) */
     @Property(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object int32Array;
     /** TypedArray (uint32) */
     @Property(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object uint32Array;
     /** TypedArray (float32) */
     @Property(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object float32Array;
     /** TypedArray (float64) */
     @Property(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object float64Array;
     /** Nashorn extension: Java access - global.Packages */
     @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object packages;
     /** Nashorn extension: Java access - global.com */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object com;
     /** Nashorn extension: Java access - global.edu */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object edu;
     /** Nashorn extension: Java access - global.java */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object java;
     /** Nashorn extension: Java access - global.javafx */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object javafx;
     /** Nashorn extension: Java access - global.javax */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object javax;
     /** Nashorn extension: Java access - global.org */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object org;
     /** Nashorn extension: Java access - global.javaImporter */
     @Property(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object javaImporter;
     /** Nashorn extension: global.Java Object constructor. */
     @Property(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
     public volatile Object javaApi;
     /** Nashorn extension: current script's file name */
     @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object __FILE__ = LOCATION_PROPERTY_PLACEHOLDER;
     /** Nashorn extension: current script's directory */
     @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object __DIR__ = LOCATION_PROPERTY_PLACEHOLDER;
     /** Nashorn extension: current source line number being executed */
     @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
     public final Object __LINE__ = LOCATION_PROPERTY_PLACEHOLDER;
     /** Used as Date.prototype's default value */
     public NativeDate   DEFAULT_DATE;
     /** Used as RegExp.prototype's default value */
     public NativeRegExp DEFAULT_REGEXP;
     /*
      * Built-in constructor objects: Even if user changes dynamic values of
      * "Object", "Array" etc., we still want to keep original values of these
      * constructors here. For example, we need to be able to create array,
      * regexp literals even after user overwrites global "Array" or "RegExp"
      * constructor - see also ECMA 262 spec. Annex D.
      */
     private ScriptFunction builtinFunction;
     private ScriptFunction builtinObject;
     private ScriptFunction builtinArray;
     private ScriptFunction builtinBoolean;
     private ScriptFunction builtinDate;
     private ScriptObject   builtinJSON;
     private ScriptFunction builtinJSAdapter;
     private ScriptObject   builtinMath;
     private ScriptFunction builtinNumber;
     private ScriptFunction builtinRegExp;
     private ScriptFunction builtinString;
     private ScriptFunction builtinError;
     private ScriptFunction builtinEval;
     private ScriptFunction builtinEvalError;
     private ScriptFunction builtinRangeError;
     private ScriptFunction builtinReferenceError;
     private ScriptFunction builtinSyntaxError;
     private ScriptFunction builtinTypeError;
     private ScriptFunction builtinURIError;
     private ScriptObject   builtinPackages;
     private ScriptObject   builtinCom;
     private ScriptObject   builtinEdu;
     private ScriptObject   builtinJava;
     private ScriptObject   builtinJavafx;
     private ScriptObject   builtinJavax;
     private ScriptObject   builtinOrg;
     private ScriptFunction builtinJavaImporter;
     private ScriptObject   builtinJavaApi;
     private ScriptFunction builtinArrayBuffer;
     private ScriptFunction builtinDataView;
     private ScriptFunction builtinInt8Array;
     private ScriptFunction builtinUint8Array;
     private ScriptFunction builtinUint8ClampedArray;
     private ScriptFunction builtinInt16Array;
     private ScriptFunction builtinUint16Array;
     private ScriptFunction builtinInt32Array;
     private ScriptFunction builtinUint32Array;
     private ScriptFunction builtinFloat32Array;
     private ScriptFunction builtinFloat64Array;
     /*
      * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
      */
     private ScriptFunction typeErrorThrower;
     // Flag to indicate that a split method issued a return statement
     private int splitState = -1;
     // Used to store the last RegExp result to support deprecated RegExp constructor properties
     private RegExpResult lastRegExpResult;
     private static final MethodHandle EVAL              = findOwnMH_S("eval",                Object.class, Object.class, Object.class);
     private static final MethodHandle NO_SUCH_PROPERTY  = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
     private static final MethodHandle PRINT             = findOwnMH_S("print",               Object.class, Object.class, Object[].class);
     private static final MethodHandle PRINTLN           = findOwnMH_S("println",             Object.class, Object.class, Object[].class);
     private static final MethodHandle LOAD              = findOwnMH_S("load",                Object.class, Object.class, Object.class);
     private static final MethodHandle LOADWITHNEWGLOBAL = findOwnMH_S("loadWithNewGlobal",   Object.class, Object.class, Object[].class);
     private static final MethodHandle EXIT              = findOwnMH_S("exit",                Object.class, Object.class, Object.class);
     /** Invalidate a reserved name, such as "apply" or "call" if assigned */
     public MethodHandle INVALIDATE_RESERVED_NAME = MH.bindTo(findOwnMH_V("invalidateReservedName", void.class, String.class), this);
     // initialized by nasgen
     private static PropertyMap $nasgenmap$;
     // context to which this global belongs to
     private final Context context;
     // current ScriptContext to use - can be null.
     private ScriptContext scontext;
     // associated Property object for "context" property.
     private jdk.nashorn.internal.runtime.Property scontextProperty;
     /**
      * Set the current script context
      * @param scontext script context
      */
     public void setScriptContext(final ScriptContext scontext) {
         this.scontext = scontext;
         scontextProperty.setValue(this, this, scontext, false);
     }
     // global constants for this global - they can be replaced with MethodHandle.constant until invalidated
     private static AtomicReference<GlobalConstants> gcsInstance = new AtomicReference<>();
     @Override
     protected Context getContext() {
         return context;
     }
     // performs initialization checks for Global constructor and returns the
     // PropertyMap, if everything is fine.
     private static PropertyMap checkAndGetMap(final Context context) {
         // security check first
         final SecurityManager sm = System.getSecurityManager();
         if (sm != null) {
             sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
         }
         // null check on context
         context.getClass();
         return $nasgenmap$;
     }
     /**
      * Constructor
      *
      * @param context the context
      */
     public Global(final Context context) {
         super(checkAndGetMap(context));
         this.context = context;
         this.setIsScope();
         this.optimisticFunctionMap = new HashMap<>();
         //we can only share one instance of Global constants between globals, or we consume way too much
         //memory - this is good enough for most programs
         while (gcsInstance.get() == null) {
             gcsInstance.compareAndSet(null, new GlobalConstants(context.getLogger(GlobalConstants.class)));
         }
     }
     /**
      * Script access to "current" Global instance
      *
      * @return the global singleton
      */
     public static Global instance() {
         final Global global = Context.getGlobal();
         global.getClass(); // null check
         return global;
     }
     private static Global instanceFrom(final Object self) {
         return self instanceof Global? (Global)self : instance();
     }
     /**
      * Return the global constants map for fields that
      * can be accessed as MethodHandle.constant
      * @return constant map
      */
     public static GlobalConstants getConstants() {
         return gcsInstance.get();
     }
     /**
      * Check if we have a Global instance
      * @return true if one exists
      */
     public static boolean hasInstance() {
         return Context.getGlobal() != null;
     }
     /**
      * Script access to {@link ScriptEnvironment}
      *
      * @return the script environment
      */
     static ScriptEnvironment getEnv() {
         return instance().getContext().getEnv();
     }
     /**
      * Script access to {@link Context}
      *
      * @return the context
      */
     static Context getThisContext() {
         return instance().getContext();
     }
     // Runtime interface to Global
     /**
      * Is there a class filter in the current Context?
      * @return class filter
      */
     public ClassFilter getClassFilter() {
         return context.getClassFilter();
     }
     /**
      * Is this global of the given Context?
      * @param ctxt the context
      * @return true if this global belongs to the given Context
      */
     public boolean isOfContext(final Context ctxt) {
         return this.context == ctxt;
     }
     /**
      * Does this global belong to a strict Context?
      * @return true if this global belongs to a strict Context
      */
     public boolean isStrictContext() {
         return context.getEnv()._strict;
     }
     /**
      * Initialize standard builtin objects like "Object", "Array", "Function" etc.
      * as well as our extension builtin objects like "Java", "JSAdapter" as properties
      * of the global scope object.
      *
      * @param engine ScriptEngine to initialize
      */
     public void initBuiltinObjects(final ScriptEngine engine) {
         if (this.builtinObject != null) {
             // already initialized, just return
             return;
         }
         init(engine);
     }
     /**
      * Wrap a Java object as corresponding script object
      *
      * @param obj object to wrap
      * @return    wrapped object
      */
     public Object wrapAsObject(final Object obj) {
         if (obj instanceof Boolean) {
             return new NativeBoolean((Boolean)obj, this);
         } else if (obj instanceof Number) {
             return new NativeNumber(((Number)obj).doubleValue(), this);
         } else if (obj instanceof String || obj instanceof ConsString) {
             return new NativeString((CharSequence)obj, this);
         } else if (obj instanceof Object[]) { // extension
             return new NativeArray((Object[])obj);
         } else if (obj instanceof double[]) { // extension
             return new NativeArray((double[])obj);
         } else if (obj instanceof long[]) {
             return new NativeArray((long[])obj);
         } else if (obj instanceof int[]) {
             return new NativeArray((int[])obj);
         } else {
             // FIXME: more special cases? Map? List?
             return obj;
         }
     }
     /**
      * Lookup helper for JS primitive types
      *
      * @param request the link request for the dynamic call site.
      * @param self     self reference
      *
      * @return guarded invocation
      */
     public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
         if (self instanceof String || self instanceof ConsString) {
             return NativeString.lookupPrimitive(request, self);
         } else if (self instanceof Number) {
             return NativeNumber.lookupPrimitive(request, self);
         } else if (self instanceof Boolean) {
             return NativeBoolean.lookupPrimitive(request, self);
         }
         throw new IllegalArgumentException("Unsupported primitive: " + self);
     }
     /**
      * Create a new empty script object
      *
      * @return the new ScriptObject
      */
     public ScriptObject newObject() {
         return new JO(getObjectPrototype(), JO.getInitialMap());
     }
     /**
      * Default value of given type
      *
      * @param sobj     script object
      * @param typeHint type hint
      *
      * @return default value
      */
     public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
         // When the [[DefaultValue]] internal method of O is called with no hint,
         // then it behaves as if the hint were Number, unless O is a Date object
         // in which case it behaves as if the hint were String.
         Class<?> hint = typeHint;
         if (hint == null) {
             hint = Number.class;
         }
         try {
             if (hint == String.class) {
                 final Object toString = TO_STRING.getGetter().invokeExact(sobj);
                 if (Bootstrap.isCallable(toString)) {
                     final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
                 if (Bootstrap.isCallable(valueOf)) {
                     final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 throw typeError(this, "cannot.get.default.string");
             }
             if (hint == Number.class) {
                 final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
                 if (Bootstrap.isCallable(valueOf)) {
                     final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 final Object toString = TO_STRING.getGetter().invokeExact(sobj);
                 if (Bootstrap.isCallable(toString)) {
                     final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
                     if (JSType.isPrimitive(value)) {
                         return value;
                     }
                 }
                 throw typeError(this, "cannot.get.default.number");
             }
         } catch (final RuntimeException | Error e) {
             throw e;
         } catch (final Throwable t) {
             throw new RuntimeException(t);
         }
         return UNDEFINED;
     }
     /**
      * Is the given ScriptObject an ECMAScript Error object?
      *
      * @param sobj the object being checked
      * @return true if sobj is an Error object
      */
     public boolean isError(final ScriptObject sobj) {
         final ScriptObject errorProto = getErrorPrototype();
         ScriptObject proto = sobj.getProto();
         while (proto != null) {
             if (proto == errorProto) {
                 return true;
             }
             proto = proto.getProto();
         }
         return false;
     }
     /**
      * Create a new ECMAScript Error object.
      *
      * @param msg error message
      * @return newly created Error object
      */
     public ScriptObject newError(final String msg) {
         return new NativeError(msg, this);
     }
     /**
      * Create a new ECMAScript EvalError object.
      *
      * @param msg error message
      * @return newly created EvalError object
      */
     public ScriptObject newEvalError(final String msg) {
         return new NativeEvalError(msg, this);
     }
     /**
      * Create a new ECMAScript RangeError object.
      *
      * @param msg error message
      * @return newly created RangeError object
      */
     public ScriptObject newRangeError(final String msg) {
         return new NativeRangeError(msg, this);
     }
     /**
      * Create a new ECMAScript ReferenceError object.
      *
      * @param msg error message
      * @return newly created ReferenceError object
      */
     public ScriptObject newReferenceError(final String msg) {
         return new NativeReferenceError(msg, this);
     }
     /**
      * Create a new ECMAScript SyntaxError object.
      *
      * @param msg error message
      * @return newly created SyntaxError object
      */
     public ScriptObject newSyntaxError(final String msg) {
         return new NativeSyntaxError(msg, this);
     }
     /**
      * Create a new ECMAScript TypeError object.
      *
      * @param msg error message
      * @return newly created TypeError object
      */
     public ScriptObject newTypeError(final String msg) {
         return new NativeTypeError(msg, this);
     }
     /**
      * Create a new ECMAScript URIError object.
      *
      * @param msg error message
      * @return newly created URIError object
      */
     public ScriptObject newURIError(final String msg) {
         return new NativeURIError(msg, this);
     }
     /**
      * Create a new ECMAScript GenericDescriptor object.
      *
      * @param configurable is the property configurable?
      * @param enumerable is the property enumerable?
      * @return newly created GenericDescriptor object
      */
     public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
         return new GenericPropertyDescriptor(configurable, enumerable, this);
     }
     /**
      * Create a new ECMAScript DatePropertyDescriptor object.
      *
      * @param value of the data property
      * @param configurable is the property configurable?
      * @param enumerable is the property enumerable?
      * @param writable is the property writable?
      * @return newly created DataPropertyDescriptor object
      */
     public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
         return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
     }
     /**
      * Create a new ECMAScript AccessorPropertyDescriptor object.
      *
      * @param get getter function of the user accessor property
      * @param set setter function of the user accessor property
      * @param configurable is the property configurable?
      * @param enumerable is the property enumerable?
      * @return newly created AccessorPropertyDescriptor object
      */
     public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
         final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
         if (get == null) {
             desc.delete(PropertyDescriptor.GET, false);
         }
         if (set == null) {
             desc.delete(PropertyDescriptor.SET, false);
         }
         return desc;
     }
     private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
         final T obj = map.get(key);
         if (obj != null) {
             return obj;
         }
         try {
             final T newObj = creator.call();
             final T existingObj = map.putIfAbsent(key, newObj);
             return existingObj != null ? existingObj : newObj;
         } catch (final Exception exp) {
             throw new RuntimeException(exp);
         }
     }
     private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
     /**
      * Get cached InvokeByName object for the given key
      * @param key key to be associated with InvokeByName object
      * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
      * @return InvokeByName object associated with the key.
      */
     public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
         return getLazilyCreatedValue(key, creator, namedInvokers);
     }
     private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
     /**
      * Get cached dynamic method handle for the given key
      * @param key key to be associated with dynamic method handle
      * @param creator if method handle is absent 'creator' is called to make one (lazy init)
      * @return dynamic method handle associated with the key.
      */
     public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
         return getLazilyCreatedValue(key, creator, dynamicInvokers);
     }
     /**
      * Hook to search missing variables in ScriptContext if available
      * @param self used to detect if scope call or not (this function is 'strict')
      * @param name name of the variable missing
      * @return value of the missing variable or undefined (or TypeError for scope search)
      */
     public static Object __noSuchProperty__(final Object self, final Object name) {
         final Global global = Global.instance();
         final ScriptContext sctxt = global.scontext;
         final String nameStr = name.toString();
         if (sctxt != null) {
             final int scope = sctxt.getAttributesScope(nameStr);
             if (scope != -1) {
                 return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
             }
         }
         if (self == UNDEFINED) {
             // scope access and so throw ReferenceError
             throw referenceError(global, "not.defined", nameStr);
         }
         return UNDEFINED;
     }
     /**
      * This is the eval used when 'indirect' eval call is made.
      *
      * var global = this;
      * global.eval("print('hello')");
      *
      * @param self  eval scope
      * @param str   eval string
      *
      * @return the result of eval
      */
     public static Object eval(final Object self, final Object str) {
         return directEval(self, str, UNDEFINED, UNDEFINED, false);
     }
     /**
      * Direct eval
      *
      * @param self     The scope of eval passed as 'self'
      * @param str      Evaluated code
      * @param callThis "this" to be passed to the evaluated code
      * @param location location of the eval call
      * @param strict   is eval called a strict mode code?
      *
      * @return the return value of the eval
      *
      * This is directly invoked from generated when eval(code) is called in user code
      */
     public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
         if (!(str instanceof String || str instanceof ConsString)) {
             return str;
         }
         final Global global = Global.instanceFrom(self);
         final ScriptObject scope = self instanceof ScriptObject ? (ScriptObject)self : global;
         return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
     }
     /**
      * Global print implementation - Nashorn extension
      *
      * @param self    scope
      * @param objects arguments to print
      *
      * @return result of print (undefined)
      */
     public static Object print(final Object self, final Object... objects) {
         return Global.instanceFrom(self).printImpl(false, objects);
     }
     /**
      * Global println implementation - Nashorn extension
      *
      * @param self    scope
      * @param objects arguments to print
      *
      * @return result of println (undefined)
      */
     public static Object println(final Object self, final Object... objects) {
         return Global.instanceFrom(self).printImpl(true, objects);
     }
     /**
      * Global load implementation - Nashorn extension
      *
      * @param self    scope
      * @param source  source to load
      *
      * @return result of load (undefined)
      *
      * @throws IOException if source could not be read
      */
     public static Object load(final Object self, final Object source) throws IOException {
         final Global global = Global.instanceFrom(self);
         final ScriptObject scope = self instanceof ScriptObject ? (ScriptObject)self : global;
         return global.getContext().load(scope, source);
     }
     /**
      * Global loadWithNewGlobal implementation - Nashorn extension
      *
      * @param self scope
      * @param args from plus (optional) arguments to be passed to the loaded script
      *
      * @return result of load (may be undefined)
      *
      * @throws IOException if source could not be read
      */
     public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
         final Global global = Global.instanceFrom(self);
         final int length = args.length;
         final boolean hasArgs = 0 < length;
         final Object from = hasArgs ? args[0] : UNDEFINED;
         final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
         return global.getContext().loadWithNewGlobal(from, arguments);
     }
     /**
      * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
      *
      * @param self  self reference
      * @param code  exit code
      *
      * @return undefined (will never be reached)
      */
     public static Object exit(final Object self, final Object code) {
         System.exit(JSType.toInt32(code));
         return UNDEFINED;
     }
     // builtin prototype accessors
     ScriptObject getFunctionPrototype() {
         return ScriptFunction.getPrototype(builtinFunction);
     }
     ScriptObject getObjectPrototype() {
         return ScriptFunction.getPrototype(builtinObject);
     }
     ScriptObject getArrayPrototype() {
         return ScriptFunction.getPrototype(builtinArray);
     }
     ScriptObject getBooleanPrototype() {
         return ScriptFunction.getPrototype(builtinBoolean);
     }
     ScriptObject getNumberPrototype() {
         return ScriptFunction.getPrototype(builtinNumber);
     }
     ScriptObject getDatePrototype() {
         return ScriptFunction.getPrototype(builtinDate);
     }
     ScriptObject getRegExpPrototype() {
         return ScriptFunction.getPrototype(builtinRegExp);
     }
     ScriptObject getStringPrototype() {
         return ScriptFunction.getPrototype(builtinString);
     }
     ScriptObject getErrorPrototype() {
         return ScriptFunction.getPrototype(builtinError);
     }
     ScriptObject getEvalErrorPrototype() {
         return ScriptFunction.getPrototype(builtinEvalError);
     }
     ScriptObject getRangeErrorPrototype() {
         return ScriptFunction.getPrototype(builtinRangeError);
     }
     ScriptObject getReferenceErrorPrototype() {
         return ScriptFunction.getPrototype(builtinReferenceError);
     }
     ScriptObject getSyntaxErrorPrototype() {
         return ScriptFunction.getPrototype(builtinSyntaxError);
     }
     ScriptObject getTypeErrorPrototype() {
         return ScriptFunction.getPrototype(builtinTypeError);
     }
     ScriptObject getURIErrorPrototype() {
         return ScriptFunction.getPrototype(builtinURIError);
     }
     ScriptObject getJavaImporterPrototype() {
         return ScriptFunction.getPrototype(builtinJavaImporter);
     }
     ScriptObject getJSAdapterPrototype() {
         return ScriptFunction.getPrototype(builtinJSAdapter);
     }
     ScriptObject getArrayBufferPrototype() {
         return ScriptFunction.getPrototype(builtinArrayBuffer);
     }
     ScriptObject getDataViewPrototype() {
         return ScriptFunction.getPrototype(builtinDataView);
     }
     ScriptObject getInt8ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinInt8Array);
     }
     ScriptObject getUint8ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint8Array);
     }
     ScriptObject getUint8ClampedArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint8ClampedArray);
     }
     ScriptObject getInt16ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinInt16Array);
     }
     ScriptObject getUint16ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint16Array);
     }
     ScriptObject getInt32ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinInt32Array);
     }
     ScriptObject getUint32ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinUint32Array);
     }
     ScriptObject getFloat32ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinFloat32Array);
     }
     ScriptObject getFloat64ArrayPrototype() {
         return ScriptFunction.getPrototype(builtinFloat64Array);
     }
     private ScriptFunction getBuiltinArray() {
         return builtinArray;
     }
     ScriptFunction getTypeErrorThrower() {
         return typeErrorThrower;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin array has not been overridden
      */
     public static boolean isBuiltinArray() {
         final Global instance = Global.instance();
         return instance.array == instance.getBuiltinArray();
     }
     private ScriptFunction getBuiltinBoolean() {
         return builtinBoolean;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin boolean has not been overridden
      */
     public static boolean isBuiltinBoolean() {
         final Global instance = Global.instance();
         return instance._boolean == instance.getBuiltinBoolean();
     }
     private ScriptFunction getBuiltinDate() {
         return builtinDate;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin date has not been overridden
      */
     public static boolean isBuiltinDate() {
         final Global instance = Global.instance();
         return instance.date == instance.getBuiltinDate();
     }
     private ScriptFunction getBuiltinError() {
         return builtinError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin error has not been overridden
      */
     public static boolean isBuiltinError() {
         final Global instance = Global.instance();
         return instance.error == instance.getBuiltinError();
     }
     private ScriptFunction getBuiltinEvalError() {
         return builtinEvalError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin eval error has not been overridden
      */
     public static boolean isBuiltinEvalError() {
         final Global instance = Global.instance();
         return instance.evalError == instance.getBuiltinEvalError();
     }
     private ScriptFunction getBuiltinFunction() {
         return builtinFunction;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin function has not been overridden
      */
     public static boolean isBuiltinFunction() {
         final Global instance = Global.instance();
         return instance.function == instance.getBuiltinFunction();
     }
     private ScriptFunction getBuiltinJSAdapter() {
         return builtinJSAdapter;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin JSAdapter has not been overridden
      */
     public static boolean isBuiltinJSAdapter() {
         final Global instance = Global.instance();
         return instance.jsadapter == instance.getBuiltinJSAdapter();
     }
     private ScriptObject getBuiltinJSON() {
         return builtinJSON;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin JSON has has not been overridden
      */
     public static boolean isBuiltinJSON() {
         final Global instance = Global.instance();
         return instance.json == instance.getBuiltinJSON();
     }
     private ScriptObject getBuiltinJava() {
         return builtinJava;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Java has not been overridden
      */
     public static boolean isBuiltinJava() {
         final Global instance = Global.instance();
         return instance.java == instance.getBuiltinJava();
     }
     private ScriptObject getBuiltinJavax() {
         return builtinJavax;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Javax has not been overridden
      */
     public static boolean isBuiltinJavax() {
         final Global instance = Global.instance();
         return instance.javax == instance.getBuiltinJavax();
     }
     private ScriptObject getBuiltinJavaImporter() {
         return builtinJavaImporter;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Java importer has not been overridden
      */
     public static boolean isBuiltinJavaImporter() {
         final Global instance = Global.instance();
         return instance.javaImporter == instance.getBuiltinJavaImporter();
     }
     private ScriptObject getBuiltinMath() {
         return builtinMath;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin math has not been overridden
      */
     public static boolean isBuiltinMath() {
         final Global instance = Global.instance();
         return instance.math == instance.getBuiltinMath();
     }
     private ScriptFunction getBuiltinNumber() {
         return builtinNumber;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin number has not been overridden
      */
     public static boolean isBuiltinNumber() {
         final Global instance = Global.instance();
         return instance.number == instance.getBuiltinNumber();
     }
     private ScriptFunction getBuiltinObject() {
         return builtinObject;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin object has not been overridden
      */
     public static boolean isBuiltinObject() {
         final Global instance = Global.instance();
         return instance.object == instance.getBuiltinObject();
     }
     private ScriptObject getBuiltinPackages() {
         return builtinPackages;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin package has not been overridden
      */
     public static boolean isBuiltinPackages() {
         final Global instance = Global.instance();
         return instance.packages == instance.getBuiltinPackages();
     }
     private ScriptFunction getBuiltinRangeError() {
         return builtinRangeError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin range error has not been overridden
      */
     public static boolean isBuiltinRangeError() {
         final Global instance = Global.instance();
         return instance.rangeError == instance.getBuiltinRangeError();
     }
     private ScriptFunction getBuiltinReferenceError() {
         return builtinReferenceError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin reference error has not been overridden
      */
     public static boolean isBuiltinReferenceError() {
         final Global instance = Global.instance();
         return instance.referenceError == instance.getBuiltinReferenceError();
     }
     private ScriptFunction getBuiltinRegExp() {
         return builtinRegExp;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin regexp has not been overridden
      */
     public static boolean isBuiltinRegExp() {
         final Global instance = Global.instance();
         return instance.regexp == instance.getBuiltinRegExp();
     }
     private ScriptFunction getBuiltinString() {
         return builtinString;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin Java has not been overridden
      */
     public static boolean isBuiltinString() {
         final Global instance = Global.instance();
         return instance.string == instance.getBuiltinString();
     }
     private ScriptFunction getBuiltinSyntaxError() {
         return builtinSyntaxError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin syntax error has not been overridden
      */
     public static boolean isBuiltinSyntaxError() {
         final Global instance = Global.instance();
         return instance.syntaxError == instance.getBuiltinSyntaxError();
     }
     private ScriptFunction getBuiltinTypeError() {
         return builtinTypeError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin type error has not been overridden
      */
     public static boolean isBuiltinTypeError() {
         final Global instance = Global.instance();
         return instance.typeError == instance.getBuiltinTypeError();
     }
     private ScriptFunction getBuiltinURIError() {
         return builtinURIError;
     }
     /**
      * Called from compiled script code to test if builtin has been overridden
      *
      * @return true if builtin URI error has not been overridden
      */
     public static boolean isBuiltinURIError() {
         final Global instance = Global.instance();
         return instance.uriError == instance.getBuiltinURIError();
     }
     @Override
     public String getClassName() {
         return "global";
     }
     /**
      * Copy function used to clone NativeRegExp objects.
      *
      * @param regexp a NativeRegExp to clone
      *
      * @return copy of the given regexp object
      */
     public static Object regExpCopy(final Object regexp) {
         return new NativeRegExp((NativeRegExp)regexp);
     }
     /**
      * Convert given object to NativeRegExp type.
      *
      * @param obj object to be converted
      * @return NativeRegExp instance
      */
     public static NativeRegExp toRegExp(final Object obj) {
         if (obj instanceof NativeRegExp) {
             return (NativeRegExp)obj;
         }
         return new NativeRegExp(JSType.toString(obj));
     }
     /**
      * ECMA 9.9 ToObject implementation
      *
      * @param obj  an item for which to run ToObject
      * @return ToObject version of given item
      */
     public static Object toObject(final Object obj) {
         if (obj == null || obj == UNDEFINED) {
             throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
         }
         if (obj instanceof ScriptObject) {
             return obj;
         }
         return instance().wrapAsObject(obj);
     }
     /**
      * Allocate a new object array.
      *
      * @param initial object values.
      * @return the new array
      */
     public static NativeArray allocate(final Object[] initial) {
         ArrayData arrayData = ArrayData.allocate(initial);
         for (int index = 0; index < initial.length; index++) {
             final Object value = initial[index];
             if (value == ScriptRuntime.EMPTY) {
                 arrayData = arrayData.delete(index);
             }
         }
         return new NativeArray(arrayData);
     }
     /**
      * Allocate a new number array.
      *
      * @param initial number values.
      * @return the new array
      */
     public static NativeArray allocate(final double[] initial) {
         return new NativeArray(ArrayData.allocate(initial));
     }
     /**
      * Allocate a new long array.
      *
      * @param initial number values.
      * @return the new array
      */
     public static NativeArray allocate(final long[] initial) {
         return new NativeArray(ArrayData.allocate(initial));
     }
     /**
      * Allocate a new integer array.
      *
      * @param initial number values.
      * @return the new array
      */
     public static NativeArray allocate(final int[] initial) {
         return new NativeArray(ArrayData.allocate(initial));
     }
     /**
      * Allocate a new object array for arguments.
      *
      * @param arguments initial arguments passed.
      * @param callee reference to the function that uses arguments object
      * @param numParams actual number of declared parameters
      *
      * @return the new array
      */
     public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
         return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
     }
     /**
      * Called from generated to check if given function is the builtin 'eval'. If
      * eval is used in a script, a lot of optimizations and assumptions cannot be done.
      *
      * @param  fn function object that is checked
      * @return true if fn is the builtin eval
      */
     public static boolean isEval(final Object fn) {
         return fn == Global.instance().builtinEval;
     }
     /**
      * Called from generated to replace a location property placeholder with the actual location property value.
      *
      * @param  placeholder the value tested for being a placeholder for a location property
      * @param  locationProperty the actual value for the location property
      * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
      */
     public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
         return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
     }
     /**
      * Called from runtime internals to check if the passed value is a location property placeholder.
      * @param  placeholder the value tested for being a placeholder for a location property
      * @return true if the value is a placeholder, false otherwise.
      */
     public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
         return placeholder == LOCATION_PROPERTY_PLACEHOLDER;
     }
     /**
      * Create a new RegExp object.
      *
      * @param expression Regular expression.
      * @param options    Search options.
      *
      * @return New RegExp object.
      */
     public static Object newRegExp(final String expression, final String options) {
         if (options == null) {
             return new NativeRegExp(expression);
         }
         return new NativeRegExp(expression, options);
     }
     /**
      * Get the object prototype
      *
      * @return the object prototype
      */
     public static ScriptObject objectPrototype() {
         return Global.instance().getObjectPrototype();
     }
     /**
      * Create a new empty object instance.
      *
      * @return New empty object.
      */
     public static ScriptObject newEmptyInstance() {
         return Global.instance().newObject();
     }
     /**
      * Check if a given object is a ScriptObject, raises an exception if this is
      * not the case
      *
      * @param obj and object to check
      * @return the script object
      */
     public static ScriptObject checkObject(final Object obj) {
         if (!(obj instanceof ScriptObject)) {
             throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
         }
         return (ScriptObject)obj;
     }
     /**
      * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
      * if this object is null or undefined.
      *
      * @param obj an object to check
      */
     public static void checkObjectCoercible(final Object obj) {
         if (obj == null || obj == UNDEFINED) {
             throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
         }
     }
     /**
      * Get the current split state.
      *
      * @return current split state
      */
     @Override
     public int getSplitState() {
         return splitState;
     }
     /**
      * Set the current split state.
      *
      * @param state current split state
      */
     @Override
     public void setSplitState(final int state) {
         splitState = state;
     }
     private void init(final ScriptEngine engine) {
         assert Context.getGlobal() == this : "this global is not set as current";
         final ScriptEnvironment env = getContext().getEnv();
         // initialize Function and Object constructor
         initFunctionAndObject();
         // Now fix Global's own proto.
         this.setInitialProto(getObjectPrototype());
         // initialize global function properties
         this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
         this.parseInt           = ScriptFunctionImpl.makeFunction("parseInt",   GlobalFunctions.PARSEINT,
                 new MethodHandle[] { GlobalFunctions.PARSEINT_OI, GlobalFunctions.PARSEINT_O });
         this.parseFloat         = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
         this.isNaN              = ScriptFunctionImpl.makeFunction("isNaN",      GlobalFunctions.IS_NAN);
         this.isFinite           = ScriptFunctionImpl.makeFunction("isFinite",   GlobalFunctions.IS_FINITE);
         this.encodeURI          = ScriptFunctionImpl.makeFunction("encodeURI",  GlobalFunctions.ENCODE_URI);
         this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
         this.decodeURI          = ScriptFunctionImpl.makeFunction("decodeURI",  GlobalFunctions.DECODE_URI);
         this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
         this.escape             = ScriptFunctionImpl.makeFunction("escape",     GlobalFunctions.ESCAPE);
         this.unescape           = ScriptFunctionImpl.makeFunction("unescape",   GlobalFunctions.UNESCAPE);
         this.print              = ScriptFunctionImpl.makeFunction("print",      env._print_no_newline ? PRINT : PRINTLN);
         this.load               = ScriptFunctionImpl.makeFunction("load",       LOAD);
         this.loadWithNewGlobal  = ScriptFunctionImpl.makeFunction("loadWithNewGlobal", LOADWITHNEWGLOBAL);
         this.exit               = ScriptFunctionImpl.makeFunction("exit",       EXIT);
         this.quit               = ScriptFunctionImpl.makeFunction("quit",       EXIT);
         // built-in constructors
         this.builtinArray     = initConstructor("Array", ScriptFunction.class);
         this.builtinBoolean   = initConstructor("Boolean", ScriptFunction.class);
         this.builtinDate      = initConstructor("Date", ScriptFunction.class);
         this.builtinJSON      = initConstructor("JSON", ScriptObject.class);
         this.builtinJSAdapter = initConstructor("JSAdapter", ScriptFunction.class);
         this.builtinMath      = initConstructor("Math", ScriptObject.class);
         this.builtinNumber    = initConstructor("Number", ScriptFunction.class);
         this.builtinRegExp    = initConstructor("RegExp", ScriptFunction.class);
         this.builtinString    = initConstructor("String", ScriptFunction.class);
         // initialize String.prototype.length to 0
         // add String.prototype.length
         final ScriptObject stringPrototype = getStringPrototype();
         stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
         // set isArray flag on Array.prototype
         final ScriptObject arrayPrototype = getArrayPrototype();
         arrayPrototype.setIsArray();
         this.DEFAULT_DATE = new NativeDate(Double.NaN, this);
         // initialize default regexp object
         this.DEFAULT_REGEXP = new NativeRegExp("(?:)", this);
         // RegExp.prototype should behave like a RegExp object. So copy the
         // properties.
         final ScriptObject regExpProto = getRegExpPrototype();
         regExpProto.addBoundProperties(DEFAULT_REGEXP);
         // Error stuff
         initErrorObjects();
         // java access
         if (! env._no_java) {
             initJavaAccess();
         }
         if (! env._no_typed_arrays) {
             initTypedArray();
         }
         if (env._scripting) {
             initScripting(env);
         }
         if (Context.DEBUG) {
             boolean debugOkay;
             final SecurityManager sm = System.getSecurityManager();
             if (sm != null) {
                 try {
                     sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
                     debugOkay = true;
                 } catch (final SecurityException ignored) {
                     // if no permission, don't initialize Debug object
                     debugOkay = false;
                 }
             } else {
                 debugOkay = true;
             }
             if (debugOkay) {
                 initDebug();
             }
         }
         copyBuiltins();
         // expose script (command line) arguments as "arguments" property of global
         arguments = wrapAsObject(env.getArguments().toArray());
         if (env._scripting) {
             // synonym for "arguments" in scripting mode
             addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
         }
         if (engine != null) {
             final int NOT_ENUMERABLE_NOT_CONFIG = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE;
             scontextProperty = addOwnProperty("context", NOT_ENUMERABLE_NOT_CONFIG, null);
             addOwnProperty("engine", NOT_ENUMERABLE_NOT_CONFIG, engine);
             // default file name
             addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
             // __noSuchProperty__ hook for ScriptContext search of missing variables
             final ScriptFunction noSuchProp = ScriptFunctionImpl.makeStrictFunction(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
             addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
         }
     }
     private void initErrorObjects() {
         // Error objects
         this.builtinError = initConstructor("Error", ScriptFunction.class);
         final ScriptObject errorProto = getErrorPrototype();
         // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
         final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
         final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
         errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
         final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
         final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
         errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
         final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
         final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
         errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
         final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
         final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
         errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
         // ECMA 15.11.4.2 Error.prototype.name
         // Error.prototype.name = "Error";
         errorProto.set(NativeError.NAME, "Error", false);
         // ECMA 15.11.4.3 Error.prototype.message
         // Error.prototype.message = "";
         errorProto.set(NativeError.MESSAGE, "", false);
         this.builtinEvalError = initErrorSubtype("EvalError", errorProto);
         this.builtinRangeError = initErrorSubtype("RangeError", errorProto);
         this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
         this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
         this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
         this.builtinURIError = initErrorSubtype("URIError", errorProto);
     }
     private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
         final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
         final ScriptObject prototype = ScriptFunction.getPrototype(cons);
         prototype.set(NativeError.NAME, name, false);
         prototype.set(NativeError.MESSAGE, "", false);
         prototype.setInitialProto(errorProto);
         return cons;
     }
     private void initJavaAccess() {
         final ScriptObject objectProto = getObjectPrototype();
         this.builtinPackages = new NativeJavaPackage("", objectProto);
         this.builtinCom = new NativeJavaPackage("com", objectProto);
         this.builtinEdu = new NativeJavaPackage("edu", objectProto);
         this.builtinJava = new NativeJavaPackage("java", objectProto);
         this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
         this.builtinJavax = new NativeJavaPackage("javax", objectProto);
         this.builtinOrg = new NativeJavaPackage("org", objectProto);
         this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
         this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
     }
     private void initScripting(final ScriptEnvironment scriptEnv) {
         Object value;
         value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
         addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
         value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
         addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
         final String execName = ScriptingFunctions.EXEC_NAME;
         value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
         addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
         // Nashorn extension: global.echo (scripting-mode-only)
         // alias for "print"
         value = get("print");
         addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
         // Nashorn extension: global.$OPTIONS (scripting-mode-only)
         final ScriptObject options = newObject();
         copyOptions(options, scriptEnv);
         addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
         // Nashorn extension: global.$ENV (scripting-mode-only)
         if (System.getSecurityManager() == null) {
             // do not fill $ENV if we have a security manager around
             // Retrieve current state of ENV variables.
             final ScriptObject env = newObject();
             env.putAll(System.getenv(), scriptEnv._strict);
             addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
         } else {
             addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
         }
         // add other special properties for exec support
         addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
         addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
         addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
     }
     private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
         for (final Field f : scriptEnv.getClass().getFields()) {
             try {
                 options.set(f.getName(), f.get(scriptEnv), false);
             } catch (final IllegalArgumentException | IllegalAccessException exp) {
                 throw new RuntimeException(exp);
             }
         }
     }
     private void initTypedArray() {
         this.builtinArrayBuffer       = initConstructor("ArrayBuffer", ScriptFunction.class);
         this.builtinDataView          = initConstructor("DataView", ScriptFunction.class);
         this.builtinInt8Array         = initConstructor("Int8Array", ScriptFunction.class);
         this.builtinUint8Array        = initConstructor("Uint8Array", ScriptFunction.class);
         this.builtinUint8ClampedArray = initConstructor("Uint8ClampedArray", ScriptFunction.class);
         this.builtinInt16Array        = initConstructor("Int16Array", ScriptFunction.class);
         this.builtinUint16Array       = initConstructor("Uint16Array", ScriptFunction.class);
         this.builtinInt32Array        = initConstructor("Int32Array", ScriptFunction.class);
         this.builtinUint32Array       = initConstructor("Uint32Array", ScriptFunction.class);
         this.builtinFloat32Array      = initConstructor("Float32Array", ScriptFunction.class);
         this.builtinFloat64Array      = initConstructor("Float64Array", ScriptFunction.class);
     }
     private void copyBuiltins() {
         this.array             = this.builtinArray;
         this._boolean          = this.builtinBoolean;
         this.date              = this.builtinDate;
         this.error             = this.builtinError;
         this.evalError         = this.builtinEvalError;
         this.function          = this.builtinFunction;
         this.jsadapter         = this.builtinJSAdapter;
         this.json              = this.builtinJSON;
         this.com               = this.builtinCom;
         this.edu               = this.builtinEdu;
         this.java              = this.builtinJava;
         this.javafx            = this.builtinJavafx;
         this.javax             = this.builtinJavax;
         this.org               = this.builtinOrg;
         this.javaImporter      = this.builtinJavaImporter;
         this.javaApi           = this.builtinJavaApi;
         this.math              = this.builtinMath;
         this.number            = this.builtinNumber;
         this.object            = this.builtinObject;
         this.packages          = this.builtinPackages;
         this.rangeError        = this.builtinRangeError;
         this.referenceError    = this.builtinReferenceError;
         this.regexp            = this.builtinRegExp;
         this.string            = this.builtinString;
         this.syntaxError       = this.builtinSyntaxError;
         this.typeError         = this.builtinTypeError;
         this.uriError          = this.builtinURIError;
         this.arrayBuffer       = this.builtinArrayBuffer;
         this.dataView          = this.builtinDataView;
         this.int8Array         = this.builtinInt8Array;
         this.uint8Array        = this.builtinUint8Array;
         this.uint8ClampedArray = this.builtinUint8ClampedArray;
         this.int16Array        = this.builtinInt16Array;
         this.uint16Array       = this.builtinUint16Array;
         this.int32Array        = this.builtinInt32Array;
         this.uint32Array       = this.builtinUint32Array;
         this.float32Array      = this.builtinFloat32Array;
         this.float64Array      = this.builtinFloat64Array;
     }
     private void initDebug() {
         this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
     }
     private Object printImpl(final boolean newLine, final Object... objects) {
         @SuppressWarnings("resource")
         final PrintWriter out = scontext != null? new PrintWriter(scontext.getWriter()) : getContext().getEnv().getOut();
         final StringBuilder sb = new StringBuilder();
         for (final Object obj : objects) {
             if (sb.length() != 0) {
                 sb.append(' ');
             }
             sb.append(JSType.toString(obj));
         }
         // Print all at once to ensure thread friendly result.
         if (newLine) {
             out.println(sb.toString());
         } else {
             out.print(sb.toString());
         }
         out.flush();
         return UNDEFINED;
     }
     /**
      * These classes are generated by nasgen tool and so we have to use
      * reflection to load and create new instance of these classes.
      */
     private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
         try {
             // Assuming class name pattern for built-in JS constructors.
             final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
             sb.append("Native");
             sb.append(name);
             sb.append("$Constructor");
             final Class<?> funcClass = Class.forName(sb.toString());
             final T res = clazz.cast(funcClass.newInstance());
             if (res instanceof ScriptFunction) {
                 // All global constructor prototypes are not-writable,
                 // not-enumerable and not-configurable.
                 final ScriptFunction func = (ScriptFunction)res;
                 func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
             }
             if (res.getProto() == null) {
                 res.setInitialProto(getObjectPrototype());
             }
             res.setIsBuiltin();
             return res;
         } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
             throw new RuntimeException(e);
         }
     }
     // Function and Object constructors are inter-dependent. Also,
     // Function.prototype
     // functions are not properly initialized. We fix the references here.
     // NOTE: be careful if you want to re-order the operations here. You may
     // have
     // to play with object references carefully!!
     private void initFunctionAndObject() {
         // First-n-foremost is Function
         this.builtinFunction      = initConstructor("Function", ScriptFunction.class);
         // create global anonymous function
         final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
         // need to copy over members of Function.prototype to anon function
         anon.addBoundProperties(getFunctionPrototype());
         // Function.prototype === Object.getPrototypeOf(Function) ===
         // <anon-function>
         builtinFunction.setInitialProto(anon);
         builtinFunction.setPrototype(anon);
         anon.set("constructor", builtinFunction, false);
         anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
         // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
         this.typeErrorThrower = new ScriptFunctionImpl("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER, null, null, 0);
         typeErrorThrower.setPrototype(UNDEFINED);
         // Non-constructor built-in functions do not have "prototype" property
         typeErrorThrower.deleteOwnProperty(typeErrorThrower.getMap().findProperty("prototype"));
         typeErrorThrower.preventExtensions();
         // now initialize Object
         this.builtinObject = initConstructor("Object", ScriptFunction.class);
         final ScriptObject ObjectPrototype = getObjectPrototype();
         // Object.getPrototypeOf(Function.prototype) === Object.prototype
         anon.setInitialProto(ObjectPrototype);
         // ES6 draft compliant __proto__ property of Object.prototype
         // accessors on Object.prototype for "__proto__"
         final ScriptFunction getProto = ScriptFunctionImpl.makeFunction("getProto", NativeObject.GET__PROTO__);
         final ScriptFunction setProto = ScriptFunctionImpl.makeFunction("setProto", NativeObject.SET__PROTO__);
         ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
         // Function valued properties of Function.prototype were not properly
         // initialized. Because, these were created before global.function and
         // global.object were not initialized.
         jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
         for (final jdk.nashorn.internal.runtime.Property property : properties) {
             final Object key = property.getKey();
             final Object value = builtinFunction.get(key);
             if (value instanceof ScriptFunction && value != anon) {
                 final ScriptFunction func = (ScriptFunction)value;
                 func.setInitialProto(getFunctionPrototype());
                 final ScriptObject prototype = ScriptFunction.getPrototype(func);
                 if (prototype != null) {
                     prototype.setInitialProto(ObjectPrototype);
                 }
             }
         }
         // For function valued properties of Object and Object.prototype, make
         // sure prototype's proto chain ends with Object.prototype
         for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
             final Object key = property.getKey();
             final Object value = builtinObject.get(key);
             if (value instanceof ScriptFunction) {
                 final ScriptFunction func = (ScriptFunction)value;
                 final ScriptObject prototype = ScriptFunction.getPrototype(func);
                 if (prototype != null) {
                     prototype.setInitialProto(ObjectPrototype);
                 }
             }
         }
         //make sure apply and call have the same invalidation switchpoint
         final SwitchPoint sp = new SwitchPoint();
         optimisticFunctionMap.put("apply", sp);
         optimisticFunctionMap.put("call", sp);
         getFunctionPrototype().getProperty("apply").setChangeCallback(sp);
         getFunctionPrototype().getProperty("call").setChangeCallback(sp);
         properties = getObjectPrototype().getMap().getProperties();
         for (final jdk.nashorn.internal.runtime.Property property : properties) {
             final Object key   = property.getKey();
             if (key.equals("constructor")) {
                 continue;
             }
             final Object value = ObjectPrototype.get(key);
             if (value instanceof ScriptFunction) {
                 final ScriptFunction func = (ScriptFunction)value;
                 final ScriptObject prototype = ScriptFunction.getPrototype(func);
                 if (prototype != null) {
                     prototype.setInitialProto(ObjectPrototype);
                 }
             }
         }
     }
     private static MethodHandle findOwnMH_V(final String name, final Class<?> rtype, final Class<?>... types) {
         return MH.findVirtual(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
     }
     private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
         return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
     }
     RegExpResult getLastRegExpResult() {
         return lastRegExpResult;
     }
     void setLastRegExpResult(final RegExpResult regExpResult) {
         this.lastRegExpResult = regExpResult;
     }
     @Override
     protected boolean isGlobal() {
         return true;
     }
     /**
      * Check if there is a switchpoint for a reserved name. If there
      * is, it must be invalidated upon properties with this name
      * @param name property name
      * @return switchpoint for invalidating this property, or null if not registered
      */
     public SwitchPoint getChangeCallback(final String name) {
         return optimisticFunctionMap.get(name);
     }
     /**
      * Is this a special name, that might be subject to invalidation
      * on write, such as "apply" or "call"
      * @param name name to check
      * @return true if special name
      */
     public boolean isSpecialName(final String name) {
         return getChangeCallback(name) != null;
     }
     /**
      * Check if a reserved property name is invalidated
      * @param name property name
      * @return true if someone has written to it since Global was instantiated
      */
     public boolean isSpecialNameValid(final String name) {
         final SwitchPoint sp = getChangeCallback(name);
         return sp != null && !sp.hasBeenInvalidated();
     }
     /**
      * Tag a reserved name as invalidated - used when someone writes
      * to a property with this name - overly conservative, but link time
      * is too late to apply e.g. apply-&gt;call specialization
      * @param name property name
      */
     public void invalidateReservedName(final String name) {
         final SwitchPoint sp = getChangeCallback(name);
         if (sp != null) {
             getContext().getLogger(ApplySpecialization.class).info("Overwrote special name '" + name +"' - invalidating switchpoint");
             SwitchPoint.invalidateAll(new SwitchPoint[] { sp });
         }
     }
     /**
      * Bootstrapper for invalidating a builtin name
      * @param lookup lookup
      * @param name   name to invalidate
      * @param type   methodhandle type
      * @return callsite for invalidator
      */
     public static CallSite invalidateNameBootstrap(final MethodHandles.Lookup lookup, final String name, final MethodType type) {
         final MethodHandle target = MH.insertArguments(Global.instance().INVALIDATE_RESERVED_NAME, 0, name);
         return new ConstantCallSite(target);
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/objects/Global.java@8f2ed41abb26 (annotated)

src/jdk/nashorn/internal/objects/Global.java