Global.java revision 1309:15a67b4f8935 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.objects;
27
28import static jdk.nashorn.internal.lookup.Lookup.MH;
29import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
30import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
31import static jdk.nashorn.internal.runtime.JSType.isString;
32import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
33
34import java.io.IOException;
35import java.io.PrintWriter;
36import java.lang.invoke.MethodHandle;
37import java.lang.invoke.MethodHandles;
38import java.lang.invoke.MethodType;
39import java.lang.invoke.SwitchPoint;
40import java.lang.reflect.Field;
41import java.util.ArrayList;
42import java.util.Arrays;
43import java.util.List;
44import java.util.Map;
45import java.util.Objects;
46import java.util.concurrent.Callable;
47import java.util.concurrent.ConcurrentHashMap;
48import javax.script.ScriptContext;
49import javax.script.ScriptEngine;
50import jdk.internal.dynalink.CallSiteDescriptor;
51import jdk.internal.dynalink.linker.GuardedInvocation;
52import jdk.internal.dynalink.linker.LinkRequest;
53import jdk.nashorn.api.scripting.ClassFilter;
54import jdk.nashorn.api.scripting.ScriptObjectMirror;
55import jdk.nashorn.internal.lookup.Lookup;
56import jdk.nashorn.internal.objects.annotations.Attribute;
57import jdk.nashorn.internal.objects.annotations.Getter;
58import jdk.nashorn.internal.objects.annotations.Property;
59import jdk.nashorn.internal.objects.annotations.ScriptClass;
60import jdk.nashorn.internal.objects.annotations.Setter;
61import jdk.nashorn.internal.runtime.Context;
62import jdk.nashorn.internal.runtime.ECMAErrors;
63import jdk.nashorn.internal.runtime.FindProperty;
64import jdk.nashorn.internal.runtime.GlobalConstants;
65import jdk.nashorn.internal.runtime.GlobalFunctions;
66import jdk.nashorn.internal.runtime.JSType;
67import jdk.nashorn.internal.runtime.NativeJavaPackage;
68import jdk.nashorn.internal.runtime.PropertyDescriptor;
69import jdk.nashorn.internal.runtime.PropertyMap;
70import jdk.nashorn.internal.runtime.Scope;
71import jdk.nashorn.internal.runtime.ScriptEnvironment;
72import jdk.nashorn.internal.runtime.ScriptFunction;
73import jdk.nashorn.internal.runtime.ScriptObject;
74import jdk.nashorn.internal.runtime.ScriptRuntime;
75import jdk.nashorn.internal.runtime.ScriptingFunctions;
76import jdk.nashorn.internal.runtime.Specialization;
77import jdk.nashorn.internal.runtime.arrays.ArrayData;
78import jdk.nashorn.internal.runtime.linker.Bootstrap;
79import jdk.nashorn.internal.runtime.linker.InvokeByName;
80import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
81import jdk.nashorn.internal.runtime.regexp.RegExpResult;
82import jdk.nashorn.internal.scripts.JD;
83import jdk.nashorn.internal.scripts.JO;
84import jdk.nashorn.tools.ShellFunctions;
85
86/**
87 * Representation of global scope.
88 */
89@ScriptClass("Global")
90public final class Global extends ScriptObject implements Scope {
91    // Placeholder value used in place of a location property (__FILE__, __DIR__, __LINE__)
92    private static final Object LOCATION_PROPERTY_PLACEHOLDER = new Object();
93    private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
94    private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
95
96    // placeholder value for lazily initialized global objects
97    private static final Object LAZY_SENTINEL = new Object();
98
99    /**
100     * Optimistic builtin names that require switchpoint invalidation
101     * upon assignment. Overly conservative, but works for now, to avoid
102     * any complicated scope checks and especially heavy weight guards
103     * like
104     *
105     * <pre>
106     *     public boolean setterGuard(final Object receiver) {
107     *         final Global          global = Global.instance();
108     *         final ScriptObject    sobj   = global.getFunctionPrototype();
109     *         final Object          apply  = sobj.get("apply");
110     *         return apply == receiver;
111     *     }
112     * </pre>
113     *
114     * Naturally, checking for builtin classes like NativeFunction is cheaper,
115     * it's when you start adding property checks for said builtins you have
116     * problems with guard speed.
117     */
118
119    /** Nashorn extension: arguments array */
120    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
121    public Object arguments;
122
123    /** ECMA 15.1.2.2 parseInt (string , radix) */
124    @Property(attributes = Attribute.NOT_ENUMERABLE)
125    public Object parseInt;
126
127    /** ECMA 15.1.2.3 parseFloat (string) */
128    @Property(attributes = Attribute.NOT_ENUMERABLE)
129    public Object parseFloat;
130
131    /** ECMA 15.1.2.4 isNaN (number) */
132    @Property(attributes = Attribute.NOT_ENUMERABLE)
133    public Object isNaN;
134
135    /** ECMA 15.1.2.5 isFinite (number) */
136    @Property(attributes = Attribute.NOT_ENUMERABLE)
137    public Object isFinite;
138
139    /** ECMA 15.1.3.3 encodeURI */
140    @Property(attributes = Attribute.NOT_ENUMERABLE)
141    public Object encodeURI;
142
143    /** ECMA 15.1.3.4 encodeURIComponent */
144    @Property(attributes = Attribute.NOT_ENUMERABLE)
145    public Object encodeURIComponent;
146
147    /** ECMA 15.1.3.1 decodeURI */
148    @Property(attributes = Attribute.NOT_ENUMERABLE)
149    public Object decodeURI;
150
151    /** ECMA 15.1.3.2 decodeURIComponent */
152    @Property(attributes = Attribute.NOT_ENUMERABLE)
153    public Object decodeURIComponent;
154
155    /** ECMA B.2.1 escape (string) */
156    @Property(attributes = Attribute.NOT_ENUMERABLE)
157    public Object escape;
158
159    /** ECMA B.2.2 unescape (string) */
160    @Property(attributes = Attribute.NOT_ENUMERABLE)
161    public Object unescape;
162
163    /** Nashorn extension: global.print */
164    @Property(attributes = Attribute.NOT_ENUMERABLE)
165    public Object print;
166
167    /** Nashorn extension: global.load */
168    @Property(attributes = Attribute.NOT_ENUMERABLE)
169    public Object load;
170
171    /** Nashorn extension: global.loadWithNewGlobal */
172    @Property(attributes = Attribute.NOT_ENUMERABLE)
173    public Object loadWithNewGlobal;
174
175    /** Nashorn extension: global.exit */
176    @Property(attributes = Attribute.NOT_ENUMERABLE)
177    public Object exit;
178
179    /** Nashorn extension: global.quit */
180    @Property(attributes = Attribute.NOT_ENUMERABLE)
181    public Object quit;
182
183    /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
184    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
185    public final double NaN = Double.NaN;
186
187    /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
188    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
189    public final double Infinity = Double.POSITIVE_INFINITY;
190
191    /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
192    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
193    public final Object undefined = UNDEFINED;
194
195    /** ECMA 15.1.2.1 eval(x) */
196    @Property(attributes = Attribute.NOT_ENUMERABLE)
197    public Object eval;
198
199    /** ECMA 15.1.4.1 Object constructor. */
200    @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
201    public volatile Object object;
202
203    /** ECMA 15.1.4.2 Function constructor. */
204    @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
205    public volatile Object function;
206
207    /** ECMA 15.1.4.3 Array constructor. */
208    @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
209    public volatile Object array;
210
211    /** ECMA 15.1.4.4 String constructor */
212    @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
213    public volatile Object string;
214
215    /** ECMA 15.1.4.5 Boolean constructor */
216    @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
217    public volatile Object _boolean;
218
219    /** ECMA 15.1.4.6 - Number constructor */
220    @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
221    public volatile Object number;
222
223    /**
224     * Getter for ECMA 15.1.4.7 Date property
225     *
226     * @param self self reference
227     * @return Date property value
228     */
229    @Getter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
230    public static Object getDate(final Object self) {
231        final Global global = Global.instanceFrom(self);
232        if (global.date == LAZY_SENTINEL) {
233            global.date = global.getBuiltinDate();
234        }
235        return global.date;
236    }
237
238    /**
239     * Setter for ECMA 15.1.4.7 Date property
240     *
241     * @param self self reference
242     * @param value value for the Date property
243     */
244    @Setter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
245    public static void setDate(final Object self, final Object value) {
246        final Global global = Global.instanceFrom(self);
247        global.date = value;
248    }
249
250    private volatile Object date = LAZY_SENTINEL;
251
252    /**
253     * Getter for ECMA 15.1.4.8 RegExp property
254     *
255     * @param self self reference
256     * @return RegExp property value
257     */
258    @Getter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
259    public static Object getRegExp(final Object self) {
260        final Global global = Global.instanceFrom(self);
261        if (global.regexp == LAZY_SENTINEL) {
262            global.regexp = global.getBuiltinRegExp();
263        }
264        return global.regexp;
265    }
266
267    /**
268     * Setter for ECMA 15.1.4.8 RegExp property
269     *
270     * @param self self reference
271     * @param value value for the RegExp property
272     */
273    @Setter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
274    public static void setRegExp(final Object self, final Object value) {
275        final Global global = Global.instanceFrom(self);
276        global.regexp = value;
277    }
278
279    private volatile Object regexp = LAZY_SENTINEL;
280
281    /**
282     * Getter for ECMA 15.12 - The JSON property
283     * @param self self reference
284     * @return the value of JSON property
285     */
286    @Getter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
287    public static Object getJSON(final Object self) {
288        final Global global = Global.instanceFrom(self);
289        if (global.json == LAZY_SENTINEL) {
290            global.json = global.getBuiltinJSON();
291        }
292        return global.json;
293    }
294
295    /**
296     * Setter for ECMA 15.12 - The JSON property
297     * @param self self reference
298     * @param value value for the JSON property
299     */
300    @Setter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
301    public static void setJSON(final Object self, final Object value) {
302        final Global global = Global.instanceFrom(self);
303        global.json = value;
304    }
305
306    private volatile Object json = LAZY_SENTINEL;
307
308    /**
309     * Getter for Nashorn extension: global.JSAdapter
310     * @param self self reference
311     * @return value of the JSAdapter property
312     */
313    @Getter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
314    public static Object getJSAdapter(final Object self) {
315        final Global global = Global.instanceFrom(self);
316        if (global.jsadapter == LAZY_SENTINEL) {
317            global.jsadapter = global.getBuiltinJSAdapter();
318        }
319        return global.jsadapter;
320    }
321
322    /**
323     * Setter for Nashorn extension: global.JSAdapter
324     * @param self self reference
325     * @param value value for the JSAdapter property
326     */
327    @Setter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
328    public static void setJSAdapter(final Object self, final Object value) {
329        final Global global = Global.instanceFrom(self);
330        global.jsadapter = value;
331    }
332
333    private volatile Object jsadapter = LAZY_SENTINEL;
334
335    /** ECMA 15.8 - The Math object */
336    @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
337    public volatile Object math;
338
339    /** Error object */
340    @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
341    public volatile Object error;
342
343    /**
344     * Getter for the EvalError property
345     * @param self self reference
346     * @return the value of EvalError property
347     */
348    @Getter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
349    public static Object getEvalError(final Object self) {
350        final Global global = Global.instanceFrom(self);
351        if (global.evalError == LAZY_SENTINEL) {
352            global.evalError = global.getBuiltinEvalError();
353        }
354        return global.evalError;
355    }
356
357    /**
358     * Setter for the EvalError property
359     * @param self self reference
360     * @param value value of the EvalError property
361     */
362    @Setter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
363    public static void setEvalError(final Object self, final Object value) {
364        final Global global = Global.instanceFrom(self);
365        global.evalError = value;
366    }
367
368    private volatile Object evalError = LAZY_SENTINEL;
369
370    /**
371     * Getter for the RangeError property.
372     * @param self self reference
373     * @return the value of RangeError property
374     */
375    @Getter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
376    public static Object getRangeError(final Object self) {
377        final Global global = Global.instanceFrom(self);
378        if (global.rangeError == LAZY_SENTINEL) {
379            global.rangeError = global.getBuiltinRangeError();
380        }
381        return global.rangeError;
382    }
383
384
385    /**
386     * Setter for the RangeError property.
387     * @param self self reference
388     * @param value value for the RangeError property
389     */
390    @Setter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
391    public static void setRangeError(final Object self, final Object value) {
392        final Global global = Global.instanceFrom(self);
393        global.rangeError = value;
394    }
395
396    private volatile Object rangeError = LAZY_SENTINEL;
397
398    /** ReferenceError object */
399    @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
400    public volatile Object referenceError;
401
402    /** SyntaxError object */
403    @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
404    public volatile Object syntaxError;
405
406    /** TypeError object */
407    @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
408    public volatile Object typeError;
409
410    /**
411     * Getter for the URIError property.
412     * @param self self reference
413     * @return the value of URIError property
414     */
415    @Getter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
416    public static Object getURIError(final Object self) {
417        final Global global = Global.instanceFrom(self);
418        if (global.uriError == LAZY_SENTINEL) {
419            global.uriError = global.getBuiltinURIError();
420        }
421        return global.uriError;
422    }
423
424    /**
425     * Setter for the URIError property.
426     * @param self self reference
427     * @param value value for the URIError property
428     */
429    @Setter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
430    public static void setURIError(final Object self, final Object value) {
431        final Global global = Global.instanceFrom(self);
432        global.uriError = value;
433    }
434
435    private volatile Object uriError = LAZY_SENTINEL;
436
437    /**
438     * Getter for the ArrayBuffer property.
439     * @param self self reference
440     * @return the value of the ArrayBuffer property
441     */
442    @Getter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
443    public static Object getArrayBuffer(final Object self) {
444        final Global global = Global.instanceFrom(self);
445        if (global.arrayBuffer == LAZY_SENTINEL) {
446            global.arrayBuffer = global.getBuiltinArrayBuffer();
447        }
448        return global.arrayBuffer;
449    }
450
451    /**
452     * Setter for the ArrayBuffer property.
453     * @param self self reference
454     * @param value value of the ArrayBuffer property
455     */
456    @Setter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
457    public static void setArrayBuffer(final Object self, final Object value) {
458        final Global global = Global.instanceFrom(self);
459        global.arrayBuffer = value;
460    }
461
462    private volatile Object arrayBuffer;
463
464    /**
465     * Getter for the DataView property.
466     * @param self self reference
467     * @return the value of the DataView property
468     */
469    @Getter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
470    public static Object getDataView(final Object self) {
471        final Global global = Global.instanceFrom(self);
472        if (global.dataView == LAZY_SENTINEL) {
473            global.dataView = global.getBuiltinDataView();
474        }
475        return global.dataView;
476    }
477
478
479    /**
480     * Setter for the DataView property.
481     * @param self self reference
482     * @param value value of the DataView property
483     */
484    @Setter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
485    public static void setDataView(final Object self, final Object value) {
486        final Global global = Global.instanceFrom(self);
487        global.dataView = value;
488    }
489
490    private volatile Object dataView;
491
492    /**
493     * Getter for the Int8Array property.
494     * @param self self reference
495     * @return the value of the Int8Array property.
496     */
497    @Getter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
498    public static Object getInt8Array(final Object self) {
499        final Global global = Global.instanceFrom(self);
500        if (global.int8Array == LAZY_SENTINEL) {
501            global.int8Array = global.getBuiltinInt8Array();
502        }
503        return global.int8Array;
504    }
505
506    /**
507     * Setter for the Int8Array property.
508     * @param self self reference
509     * @param value value of the Int8Array property
510     */
511    @Setter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
512    public static void setInt8Array(final Object self, final Object value) {
513        final Global global = Global.instanceFrom(self);
514        global.int8Array = value;
515    }
516
517    private volatile Object int8Array;
518
519    /**
520     * Getter for the Uin8Array property.
521     * @param self self reference
522     * @return the value of the Uint8Array property
523     */
524    @Getter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
525    public static Object getUint8Array(final Object self) {
526        final Global global = Global.instanceFrom(self);
527        if (global.uint8Array == LAZY_SENTINEL) {
528            global.uint8Array = global.getBuiltinUint8Array();
529        }
530        return global.uint8Array;
531    }
532
533    /**
534     * Setter for the Uin8Array property.
535     * @param self self reference
536     * @param value value of the Uin8Array property
537     */
538    @Setter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
539    public static void setUint8Array(final Object self, final Object value) {
540        final Global global = Global.instanceFrom(self);
541        global.uint8Array = value;
542    }
543
544    private volatile Object uint8Array;
545
546    /**
547     * Getter for the Uint8ClampedArray property.
548     * @param self self reference
549     * @return the value of the Uint8ClampedArray property
550     */
551    @Getter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
552    public static Object getUint8ClampedArray(final Object self) {
553        final Global global = Global.instanceFrom(self);
554        if (global.uint8ClampedArray == LAZY_SENTINEL) {
555            global.uint8ClampedArray = global.getBuiltinUint8ClampedArray();
556        }
557        return global.uint8ClampedArray;
558    }
559
560    /**
561     * Setter for the Uint8ClampedArray property.
562     * @param self self reference
563     * @param value value of the Uint8ClampedArray property
564     */
565    @Setter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
566    public static void setUint8ClampedArray(final Object self, final Object value) {
567        final Global global = Global.instanceFrom(self);
568        global.uint8ClampedArray = value;
569    }
570
571    private volatile Object uint8ClampedArray;
572
573    /**
574     * Getter for the Int16Array property.
575     * @param self self reference
576     * @return the value of the Int16Array property
577     */
578    @Getter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
579    public static Object getInt16Array(final Object self) {
580        final Global global = Global.instanceFrom(self);
581        if (global.int16Array == LAZY_SENTINEL) {
582            global.int16Array = global.getBuiltinInt16Array();
583        }
584        return global.int16Array;
585    }
586
587    /**
588     * Setter for the Int16Array property.
589     * @param self self reference
590     * @param value value of the Int16Array property
591     */
592    @Setter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
593    public static void setInt16Array(final Object self, final Object value) {
594        final Global global = Global.instanceFrom(self);
595        global.int16Array = value;
596    }
597
598    private volatile Object int16Array;
599
600    /**
601     * Getter for the Uint16Array property.
602     * @param self self reference
603     * @return the value of the Uint16Array property
604     */
605    @Getter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
606    public static Object getUint16Array(final Object self) {
607        final Global global = Global.instanceFrom(self);
608        if (global.uint16Array == LAZY_SENTINEL) {
609            global.uint16Array = global.getBuiltinUint16Array();
610        }
611        return global.uint16Array;
612    }
613
614    /**
615     * Setter for the Uint16Array property.
616     * @param self self reference
617     * @param value value of the Uint16Array property
618     */
619    @Setter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
620    public static void setUint16Array(final Object self, final Object value) {
621        final Global global = Global.instanceFrom(self);
622        global.uint16Array = value;
623    }
624
625    private volatile Object uint16Array;
626
627    /**
628     * Getter for the Int32Array property.
629     *
630     * @param self self reference
631     * @return the value of the Int32Array property
632     */
633    @Getter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
634    public static Object getInt32Array(final Object self) {
635        final Global global = Global.instanceFrom(self);
636        if (global.int32Array == LAZY_SENTINEL) {
637            global.int32Array = global.getBuiltinInt32Array();
638        }
639        return global.int32Array;
640    }
641
642
643    /**
644     * Setter for the Int32Array property.
645     *
646     * @param self self reference
647     * @param value value of the Int32Array property
648     */
649    @Setter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
650    public static void setInt32Array(final Object self, final Object value) {
651        final Global global = Global.instanceFrom(self);
652        global.int32Array = value;
653    }
654
655    private volatile Object int32Array;
656
657    /**
658     * Getter of the Uint32Array property.
659     *
660     * @param self self reference
661     * @return the value of the Uint32Array property
662     */
663    @Getter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
664    public static Object getUint32Array(final Object self) {
665        final Global global = Global.instanceFrom(self);
666        if (global.uint32Array == LAZY_SENTINEL) {
667            global.uint32Array = global.getBuiltinUint32Array();
668        }
669        return global.uint32Array;
670    }
671
672
673    /**
674     * Setter of the Uint32Array property.
675     *
676     * @param self self reference
677     * @param value value of the Uint32Array property
678     */
679    @Setter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
680    public static void setUint32Array(final Object self, final Object value) {
681        final Global global = Global.instanceFrom(self);
682        global.uint32Array = value;
683    }
684
685    private volatile Object uint32Array;
686
687    /**
688     * Getter for the Float32Array property.
689     *
690     * @param self self reference
691     * @return the value of the Float32Array property
692     */
693    @Getter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
694    public static Object getFloat32Array(final Object self) {
695        final Global global = Global.instanceFrom(self);
696        if (global.float32Array == LAZY_SENTINEL) {
697            global.float32Array = global.getBuiltinFloat32Array();
698        }
699        return global.float32Array;
700    }
701
702    /**
703     * Setter for the Float32Array property.
704     *
705     * @param self self reference
706     * @param value value of the Float32Array property
707     */
708    @Setter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
709    public static void setFloat32Array(final Object self, final Object value) {
710        final Global global = Global.instanceFrom(self);
711        global.float32Array = value;
712    }
713
714    private volatile Object float32Array;
715
716    /**
717     * Getter for the Float64Array property.
718     *
719     * @param self self reference
720     * @return the value of the Float64Array property
721     */
722    @Getter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
723    public static Object getFloat64Array(final Object self) {
724        final Global global = Global.instanceFrom(self);
725        if (global.float64Array == LAZY_SENTINEL) {
726            global.float64Array = global.getBuiltinFloat64Array();
727        }
728        return global.float64Array;
729    }
730
731    /**
732     * Setter for the Float64Array property.
733     *
734     * @param self self reference
735     * @param value value of the Float64Array property
736     */
737    @Setter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
738    public static void setFloat64Array(final Object self, final Object value) {
739        final Global global = Global.instanceFrom(self);
740        global.float64Array = value;
741    }
742
743    private volatile Object float64Array;
744
745    /** Nashorn extension: Java access - global.Packages */
746    @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
747    public volatile Object packages;
748
749    /** Nashorn extension: Java access - global.com */
750    @Property(attributes = Attribute.NOT_ENUMERABLE)
751    public volatile Object com;
752
753    /** Nashorn extension: Java access - global.edu */
754    @Property(attributes = Attribute.NOT_ENUMERABLE)
755    public volatile Object edu;
756
757    /** Nashorn extension: Java access - global.java */
758    @Property(attributes = Attribute.NOT_ENUMERABLE)
759    public volatile Object java;
760
761    /** Nashorn extension: Java access - global.javafx */
762    @Property(attributes = Attribute.NOT_ENUMERABLE)
763    public volatile Object javafx;
764
765    /** Nashorn extension: Java access - global.javax */
766    @Property(attributes = Attribute.NOT_ENUMERABLE)
767    public volatile Object javax;
768
769    /** Nashorn extension: Java access - global.org */
770    @Property(attributes = Attribute.NOT_ENUMERABLE)
771    public volatile Object org;
772
773    /**
774     * Getter for the Nashorn extension: Java access - global.javaImporter.
775     *
776     * @param self self reference
777     * @return the value of the JavaImporter property
778     */
779    @Getter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
780    public static Object getJavaImporter(final Object self) {
781        final Global global = Global.instanceFrom(self);
782        if (global.javaImporter == LAZY_SENTINEL) {
783            global.javaImporter = global.getBuiltinJavaImporter();
784        }
785        return global.javaImporter;
786    }
787
788    /**
789     * Setter for the Nashorn extension: Java access - global.javaImporter.
790     *
791     * @param self self reference
792     * @param value value of the JavaImporter property
793     */
794    @Setter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
795    public static void setJavaImporter(final Object self, final Object value) {
796        final Global global = Global.instanceFrom(self);
797        global.javaImporter = value;
798    }
799
800    private volatile Object javaImporter;
801
802    /**
803     * Getter for the Nashorn extension: global.Java property.
804     *
805     * @param self self reference
806     * @return the value of the Java property
807     */
808    @Getter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
809    public static Object getJavaApi(final Object self) {
810        final Global global = Global.instanceFrom(self);
811        if (global.javaApi == LAZY_SENTINEL) {
812            global.javaApi = global.getBuiltinJavaApi();
813        }
814        return global.javaApi;
815    }
816
817    /**
818     * Setter for the Nashorn extension: global.Java property.
819     *
820     * @param self self reference
821     * @param value value of the Java property
822     */
823    @Setter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
824    public static void setJavaApi(final Object self, final Object value) {
825        final Global global = Global.instanceFrom(self);
826        global.javaApi = value;
827    }
828
829    private volatile Object javaApi;
830
831    /** Nashorn extension: current script's file name */
832    @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
833    public final Object __FILE__ = LOCATION_PROPERTY_PLACEHOLDER;
834
835    /** Nashorn extension: current script's directory */
836    @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
837    public final Object __DIR__ = LOCATION_PROPERTY_PLACEHOLDER;
838
839    /** Nashorn extension: current source line number being executed */
840    @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
841    public final Object __LINE__ = LOCATION_PROPERTY_PLACEHOLDER;
842
843    private volatile NativeDate DEFAULT_DATE;
844
845    /** Used as Date.prototype's default value */
846    NativeDate getDefaultDate() {
847        return DEFAULT_DATE;
848    }
849
850    private volatile NativeRegExp DEFAULT_REGEXP;
851
852    /** Used as RegExp.prototype's default value */
853    NativeRegExp getDefaultRegExp() {
854        return DEFAULT_REGEXP;
855    }
856
857    /*
858     * Built-in constructor objects: Even if user changes dynamic values of
859     * "Object", "Array" etc., we still want to keep original values of these
860     * constructors here. For example, we need to be able to create array,
861     * regexp literals even after user overwrites global "Array" or "RegExp"
862     * constructor - see also ECMA 262 spec. Annex D.
863     */
864    private ScriptFunction builtinFunction;
865    private ScriptFunction builtinObject;
866    private ScriptFunction builtinArray;
867    private ScriptFunction builtinBoolean;
868    private ScriptFunction builtinDate;
869    private ScriptObject   builtinJSON;
870    private ScriptFunction builtinJSAdapter;
871    private ScriptObject   builtinMath;
872    private ScriptFunction builtinNumber;
873    private ScriptFunction builtinRegExp;
874    private ScriptFunction builtinString;
875    private ScriptFunction builtinError;
876    private ScriptFunction builtinEval;
877    private ScriptFunction builtinEvalError;
878    private ScriptFunction builtinRangeError;
879    private ScriptFunction builtinReferenceError;
880    private ScriptFunction builtinSyntaxError;
881    private ScriptFunction builtinTypeError;
882    private ScriptFunction builtinURIError;
883    private ScriptObject   builtinPackages;
884    private ScriptObject   builtinCom;
885    private ScriptObject   builtinEdu;
886    private ScriptObject   builtinJava;
887    private ScriptObject   builtinJavafx;
888    private ScriptObject   builtinJavax;
889    private ScriptObject   builtinOrg;
890    private ScriptFunction builtinJavaImporter;
891    private ScriptObject   builtinJavaApi;
892    private ScriptFunction builtinArrayBuffer;
893    private ScriptFunction builtinDataView;
894    private ScriptFunction builtinInt8Array;
895    private ScriptFunction builtinUint8Array;
896    private ScriptFunction builtinUint8ClampedArray;
897    private ScriptFunction builtinInt16Array;
898    private ScriptFunction builtinUint16Array;
899    private ScriptFunction builtinInt32Array;
900    private ScriptFunction builtinUint32Array;
901    private ScriptFunction builtinFloat32Array;
902    private ScriptFunction builtinFloat64Array;
903
904    /*
905     * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
906     */
907    private ScriptFunction typeErrorThrower;
908
909    // Flag to indicate that a split method issued a return statement
910    private int splitState = -1;
911
912    // Used to store the last RegExp result to support deprecated RegExp constructor properties
913    private RegExpResult lastRegExpResult;
914
915    private static final MethodHandle EVAL                 = findOwnMH_S("eval",                Object.class, Object.class, Object.class);
916    private static final MethodHandle NO_SUCH_PROPERTY     = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
917    private static final MethodHandle PRINT                = findOwnMH_S("print",               Object.class, Object.class, Object[].class);
918    private static final MethodHandle PRINTLN              = findOwnMH_S("println",             Object.class, Object.class, Object[].class);
919    private static final MethodHandle LOAD                 = findOwnMH_S("load",                Object.class, Object.class, Object.class);
920    private static final MethodHandle LOAD_WITH_NEW_GLOBAL = findOwnMH_S("loadWithNewGlobal",   Object.class, Object.class, Object[].class);
921    private static final MethodHandle EXIT                 = findOwnMH_S("exit",                Object.class, Object.class, Object.class);
922    private static final MethodHandle LEXICAL_SCOPE_FILTER = findOwnMH_S("lexicalScopeFilter",  Object.class, Object.class);
923
924    // initialized by nasgen
925    private static PropertyMap $nasgenmap$;
926
927    // context to which this global belongs to
928    private final Context context;
929
930    // current ScriptContext to use - can be null.
931    private ThreadLocal<ScriptContext> scontext;
932    // current ScriptEngine associated - can be null.
933    private ScriptEngine engine;
934    // initial ScriptContext - can be null
935    private volatile ScriptContext initscontext;
936
937    // ES6 global lexical scope.
938    private final LexicalScope lexicalScope;
939
940    // Switchpoint for non-constant global callsites in the presence of ES6 lexical scope.
941    private SwitchPoint lexicalScopeSwitchPoint;
942
943    /**
944     * Set the current script context
945     * @param ctxt script context
946     */
947    public void setScriptContext(final ScriptContext ctxt) {
948        assert scontext != null;
949        scontext.set(ctxt);
950    }
951
952    /**
953     * Get the current script context
954     * @return current script context
955     */
956    public ScriptContext getScriptContext() {
957        assert scontext != null;
958        return scontext.get();
959    }
960
961    private ScriptContext currentContext() {
962        final ScriptContext sc = scontext != null? scontext.get() : null;
963        return sc == null? initscontext : sc;
964    }
965
966    @Override
967    protected Context getContext() {
968        return context;
969    }
970
971    @Override
972    protected boolean useDualFields() {
973        return context.useDualFields();
974    }
975
976    // performs initialization checks for Global constructor and returns the
977    // PropertyMap, if everything is fine.
978    private static PropertyMap checkAndGetMap(final Context context) {
979        // security check first
980        final SecurityManager sm = System.getSecurityManager();
981        if (sm != null) {
982            sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
983        }
984
985        Objects.requireNonNull(context);
986
987        return $nasgenmap$;
988    }
989
990    /**
991     * Constructor
992     *
993     * @param context the context
994     */
995    public Global(final Context context) {
996        super(checkAndGetMap(context));
997        this.context = context;
998        this.setIsScope();
999        this.lexicalScope = context.getEnv()._es6 ? new LexicalScope(this) : null;
1000    }
1001
1002    /**
1003     * Script access to "current" Global instance
1004     *
1005     * @return the global singleton
1006     */
1007    public static Global instance() {
1008        return Objects.requireNonNull(Context.getGlobal());
1009    }
1010
1011    private static Global instanceFrom(final Object self) {
1012        return self instanceof Global? (Global)self : instance();
1013    }
1014
1015    /**
1016     * Check if we have a Global instance
1017     * @return true if one exists
1018     */
1019    public static boolean hasInstance() {
1020        return Context.getGlobal() != null;
1021    }
1022
1023    /**
1024     * Script access to {@link ScriptEnvironment}
1025     *
1026     * @return the script environment
1027     */
1028    static ScriptEnvironment getEnv() {
1029        return instance().getContext().getEnv();
1030    }
1031
1032    /**
1033     * Script access to {@link Context}
1034     *
1035     * @return the context
1036     */
1037    static Context getThisContext() {
1038        return instance().getContext();
1039    }
1040
1041    // Runtime interface to Global
1042
1043    /**
1044     * Is there a class filter in the current Context?
1045     * @return class filter
1046     */
1047    public ClassFilter getClassFilter() {
1048        return context.getClassFilter();
1049    }
1050
1051    /**
1052     * Is this global of the given Context?
1053     * @param ctxt the context
1054     * @return true if this global belongs to the given Context
1055     */
1056    public boolean isOfContext(final Context ctxt) {
1057        return this.context == ctxt;
1058    }
1059
1060    /**
1061     * Does this global belong to a strict Context?
1062     * @return true if this global belongs to a strict Context
1063     */
1064    public boolean isStrictContext() {
1065        return context.getEnv()._strict;
1066    }
1067
1068    /**
1069     * Initialize standard builtin objects like "Object", "Array", "Function" etc.
1070     * as well as our extension builtin objects like "Java", "JSAdapter" as properties
1071     * of the global scope object.
1072     *
1073     * @param eng ScriptEngine to initialize
1074     * @param ctxt ScriptContext to initialize
1075     */
1076    public void initBuiltinObjects(final ScriptEngine eng, final ScriptContext ctxt) {
1077        if (this.builtinObject != null) {
1078            // already initialized, just return
1079            return;
1080        }
1081
1082        this.engine = eng;
1083        this.initscontext = ctxt;
1084        if (this.engine != null) {
1085            this.scontext = new ThreadLocal<>();
1086        }
1087        init(eng);
1088    }
1089
1090    /**
1091     * Wrap a Java object as corresponding script object
1092     *
1093     * @param obj object to wrap
1094     * @return    wrapped object
1095     */
1096    public Object wrapAsObject(final Object obj) {
1097        if (obj instanceof Boolean) {
1098            return new NativeBoolean((Boolean)obj, this);
1099        } else if (obj instanceof Number) {
1100            return new NativeNumber(((Number)obj).doubleValue(), this);
1101        } else if (isString(obj)) {
1102            return new NativeString((CharSequence)obj, this);
1103        } else if (obj instanceof Object[]) { // extension
1104            return new NativeArray(ArrayData.allocate((Object[])obj), this);
1105        } else if (obj instanceof double[]) { // extension
1106            return new NativeArray(ArrayData.allocate((double[])obj), this);
1107        } else if (obj instanceof long[]) {
1108            return new NativeArray(ArrayData.allocate((long[])obj), this);
1109        } else if (obj instanceof int[]) {
1110            return new NativeArray(ArrayData.allocate((int[]) obj), this);
1111        } else if (obj instanceof ArrayData) {
1112            return new NativeArray((ArrayData) obj, this);
1113        } else {
1114            // FIXME: more special cases? Map? List?
1115            return obj;
1116        }
1117    }
1118
1119    /**
1120     * Lookup helper for JS primitive types
1121     *
1122     * @param request the link request for the dynamic call site.
1123     * @param self     self reference
1124     *
1125     * @return guarded invocation
1126     */
1127    public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
1128        if (isString(self)) {
1129            return NativeString.lookupPrimitive(request, self);
1130        } else if (self instanceof Number) {
1131            return NativeNumber.lookupPrimitive(request, self);
1132        } else if (self instanceof Boolean) {
1133            return NativeBoolean.lookupPrimitive(request, self);
1134        }
1135        throw new IllegalArgumentException("Unsupported primitive: " + self);
1136    }
1137
1138    /**
1139     * Returns a method handle that creates a wrapper object for a JS primitive value.
1140     *
1141     * @param self receiver object
1142     * @return method handle to create wrapper objects for primitive receiver
1143     */
1144    public static MethodHandle getPrimitiveWrapFilter(final Object self) {
1145        if (isString(self)) {
1146            return NativeString.WRAPFILTER;
1147        } else if (self instanceof Number) {
1148            return NativeNumber.WRAPFILTER;
1149        } else if (self instanceof Boolean) {
1150            return NativeBoolean.WRAPFILTER;
1151        }
1152        throw new IllegalArgumentException("Unsupported primitive: " + self);
1153    }
1154
1155
1156    /**
1157     * Create a new empty script object
1158     *
1159     * @return the new ScriptObject
1160     */
1161    public ScriptObject newObject() {
1162        return useDualFields() ? new JD(getObjectPrototype()) : new JO(getObjectPrototype());
1163    }
1164
1165    /**
1166     * Default value of given type
1167     *
1168     * @param sobj     script object
1169     * @param typeHint type hint
1170     *
1171     * @return default value
1172     */
1173    public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
1174        // When the [[DefaultValue]] internal method of O is called with no hint,
1175        // then it behaves as if the hint were Number, unless O is a Date object
1176        // in which case it behaves as if the hint were String.
1177        Class<?> hint = typeHint;
1178        if (hint == null) {
1179            hint = Number.class;
1180        }
1181
1182        try {
1183            if (hint == String.class) {
1184
1185                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1186
1187                if (Bootstrap.isCallable(toString)) {
1188                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1189                    if (JSType.isPrimitive(value)) {
1190                        return value;
1191                    }
1192                }
1193
1194                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1195                if (Bootstrap.isCallable(valueOf)) {
1196                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1197                    if (JSType.isPrimitive(value)) {
1198                        return value;
1199                    }
1200                }
1201                throw typeError(this, "cannot.get.default.string");
1202            }
1203
1204            if (hint == Number.class) {
1205                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1206                if (Bootstrap.isCallable(valueOf)) {
1207                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1208                    if (JSType.isPrimitive(value)) {
1209                        return value;
1210                    }
1211                }
1212
1213                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1214                if (Bootstrap.isCallable(toString)) {
1215                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1216                    if (JSType.isPrimitive(value)) {
1217                        return value;
1218                    }
1219                }
1220
1221                throw typeError(this, "cannot.get.default.number");
1222            }
1223        } catch (final RuntimeException | Error e) {
1224            throw e;
1225        } catch (final Throwable t) {
1226            throw new RuntimeException(t);
1227        }
1228
1229        return UNDEFINED;
1230    }
1231
1232    /**
1233     * Is the given ScriptObject an ECMAScript Error object?
1234     *
1235     * @param sobj the object being checked
1236     * @return true if sobj is an Error object
1237     */
1238    public boolean isError(final ScriptObject sobj) {
1239        final ScriptObject errorProto = getErrorPrototype();
1240        ScriptObject proto = sobj.getProto();
1241        while (proto != null) {
1242            if (proto == errorProto) {
1243                return true;
1244            }
1245            proto = proto.getProto();
1246        }
1247        return false;
1248    }
1249
1250    /**
1251     * Create a new ECMAScript Error object.
1252     *
1253     * @param msg error message
1254     * @return newly created Error object
1255     */
1256    public ScriptObject newError(final String msg) {
1257        return new NativeError(msg, this);
1258    }
1259
1260    /**
1261     * Create a new ECMAScript EvalError object.
1262     *
1263     * @param msg error message
1264     * @return newly created EvalError object
1265     */
1266    public ScriptObject newEvalError(final String msg) {
1267        return new NativeEvalError(msg, this);
1268    }
1269
1270    /**
1271     * Create a new ECMAScript RangeError object.
1272     *
1273     * @param msg error message
1274     * @return newly created RangeError object
1275     */
1276    public ScriptObject newRangeError(final String msg) {
1277        return new NativeRangeError(msg, this);
1278    }
1279
1280    /**
1281     * Create a new ECMAScript ReferenceError object.
1282     *
1283     * @param msg error message
1284     * @return newly created ReferenceError object
1285     */
1286    public ScriptObject newReferenceError(final String msg) {
1287        return new NativeReferenceError(msg, this);
1288    }
1289
1290    /**
1291     * Create a new ECMAScript SyntaxError object.
1292     *
1293     * @param msg error message
1294     * @return newly created SyntaxError object
1295     */
1296    public ScriptObject newSyntaxError(final String msg) {
1297        return new NativeSyntaxError(msg, this);
1298    }
1299
1300    /**
1301     * Create a new ECMAScript TypeError object.
1302     *
1303     * @param msg error message
1304     * @return newly created TypeError object
1305     */
1306    public ScriptObject newTypeError(final String msg) {
1307        return new NativeTypeError(msg, this);
1308    }
1309
1310    /**
1311     * Create a new ECMAScript URIError object.
1312     *
1313     * @param msg error message
1314     * @return newly created URIError object
1315     */
1316    public ScriptObject newURIError(final String msg) {
1317        return new NativeURIError(msg, this);
1318    }
1319
1320    /**
1321     * Create a new ECMAScript GenericDescriptor object.
1322     *
1323     * @param configurable is the property configurable?
1324     * @param enumerable is the property enumerable?
1325     * @return newly created GenericDescriptor object
1326     */
1327    public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
1328        return new GenericPropertyDescriptor(configurable, enumerable, this);
1329    }
1330
1331    /**
1332     * Create a new ECMAScript DatePropertyDescriptor object.
1333     *
1334     * @param value of the data property
1335     * @param configurable is the property configurable?
1336     * @param enumerable is the property enumerable?
1337     * @param writable is the property writable?
1338     * @return newly created DataPropertyDescriptor object
1339     */
1340    public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
1341        return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
1342    }
1343
1344    /**
1345     * Create a new ECMAScript AccessorPropertyDescriptor object.
1346     *
1347     * @param get getter function of the user accessor property
1348     * @param set setter function of the user accessor property
1349     * @param configurable is the property configurable?
1350     * @param enumerable is the property enumerable?
1351     * @return newly created AccessorPropertyDescriptor object
1352     */
1353    public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
1354        final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
1355
1356        if (get == null) {
1357            desc.delete(PropertyDescriptor.GET, false);
1358        }
1359
1360        if (set == null) {
1361            desc.delete(PropertyDescriptor.SET, false);
1362        }
1363
1364        return desc;
1365    }
1366
1367    private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
1368        final T obj = map.get(key);
1369        if (obj != null) {
1370            return obj;
1371        }
1372
1373        try {
1374            final T newObj = creator.call();
1375            final T existingObj = map.putIfAbsent(key, newObj);
1376            return existingObj != null ? existingObj : newObj;
1377        } catch (final Exception exp) {
1378            throw new RuntimeException(exp);
1379        }
1380    }
1381
1382    private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
1383
1384
1385    /**
1386     * Get cached InvokeByName object for the given key
1387     * @param key key to be associated with InvokeByName object
1388     * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
1389     * @return InvokeByName object associated with the key.
1390     */
1391    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
1392        return getLazilyCreatedValue(key, creator, namedInvokers);
1393    }
1394
1395    private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
1396
1397    /**
1398     * Get cached dynamic method handle for the given key
1399     * @param key key to be associated with dynamic method handle
1400     * @param creator if method handle is absent 'creator' is called to make one (lazy init)
1401     * @return dynamic method handle associated with the key.
1402     */
1403    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
1404        return getLazilyCreatedValue(key, creator, dynamicInvokers);
1405    }
1406
1407    /**
1408     * Hook to search missing variables in ScriptContext if available
1409     * @param self used to detect if scope call or not (this function is 'strict')
1410     * @param name name of the variable missing
1411     * @return value of the missing variable or undefined (or TypeError for scope search)
1412     */
1413    public static Object __noSuchProperty__(final Object self, final Object name) {
1414        final Global global = Global.instance();
1415        final ScriptContext sctxt = global.currentContext();
1416        final String nameStr = name.toString();
1417
1418        if (sctxt != null) {
1419            final int scope = sctxt.getAttributesScope(nameStr);
1420            if (scope != -1) {
1421                return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
1422            }
1423        }
1424
1425        switch (nameStr) {
1426        case "context":
1427            return sctxt;
1428        case "engine":
1429            return global.engine;
1430        default:
1431            break;
1432        }
1433
1434        if (self == UNDEFINED) {
1435            // scope access and so throw ReferenceError
1436            throw referenceError(global, "not.defined", nameStr);
1437        }
1438
1439        return UNDEFINED;
1440    }
1441
1442    /**
1443     * This is the eval used when 'indirect' eval call is made.
1444     *
1445     * var global = this;
1446     * global.eval("print('hello')");
1447     *
1448     * @param self  eval scope
1449     * @param str   eval string
1450     *
1451     * @return the result of eval
1452     */
1453    public static Object eval(final Object self, final Object str) {
1454        return directEval(self, str, UNDEFINED, UNDEFINED, false);
1455    }
1456
1457    /**
1458     * Direct eval
1459     *
1460     * @param self     The scope of eval passed as 'self'
1461     * @param str      Evaluated code
1462     * @param callThis "this" to be passed to the evaluated code
1463     * @param location location of the eval call
1464     * @param strict   is eval called a strict mode code?
1465     *
1466     * @return the return value of the eval
1467     *
1468     * This is directly invoked from generated when eval(code) is called in user code
1469     */
1470    public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
1471        if (!isString(str)) {
1472            return str;
1473        }
1474        final Global global = Global.instanceFrom(self);
1475        final ScriptObject scope = self instanceof ScriptObject && ((ScriptObject)self).isScope() ? (ScriptObject)self : global;
1476
1477        return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
1478    }
1479
1480    /**
1481     * Global print implementation - Nashorn extension
1482     *
1483     * @param self    scope
1484     * @param objects arguments to print
1485     *
1486     * @return result of print (undefined)
1487     */
1488    public static Object print(final Object self, final Object... objects) {
1489        return Global.instanceFrom(self).printImpl(false, objects);
1490    }
1491
1492    /**
1493     * Global println implementation - Nashorn extension
1494     *
1495     * @param self    scope
1496     * @param objects arguments to print
1497     *
1498     * @return result of println (undefined)
1499     */
1500    public static Object println(final Object self, final Object... objects) {
1501        return Global.instanceFrom(self).printImpl(true, objects);
1502    }
1503
1504    /**
1505     * Global load implementation - Nashorn extension
1506     *
1507     * @param self    scope
1508     * @param source  source to load
1509     *
1510     * @return result of load (undefined)
1511     *
1512     * @throws IOException if source could not be read
1513     */
1514    public static Object load(final Object self, final Object source) throws IOException {
1515        final Global global = Global.instanceFrom(self);
1516        final ScriptObject scope = self instanceof ScriptObject ? (ScriptObject)self : global;
1517        return global.getContext().load(scope, source);
1518    }
1519
1520    /**
1521     * Global loadWithNewGlobal implementation - Nashorn extension
1522     *
1523     * @param self scope
1524     * @param args from plus (optional) arguments to be passed to the loaded script
1525     *
1526     * @return result of load (may be undefined)
1527     *
1528     * @throws IOException if source could not be read
1529     */
1530    public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
1531        final Global global = Global.instanceFrom(self);
1532        final int length = args.length;
1533        final boolean hasArgs = 0 < length;
1534        final Object from = hasArgs ? args[0] : UNDEFINED;
1535        final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
1536
1537        return global.getContext().loadWithNewGlobal(from, arguments);
1538    }
1539
1540    /**
1541     * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
1542     *
1543     * @param self  self reference
1544     * @param code  exit code
1545     *
1546     * @return undefined (will never be reached)
1547     */
1548    public static Object exit(final Object self, final Object code) {
1549        System.exit(JSType.toInt32(code));
1550        return UNDEFINED;
1551    }
1552
1553    // builtin prototype accessors
1554
1555    /**
1556     * Get the builtin Object prototype.
1557     * @return the object prototype.
1558     */
1559    public ScriptObject getObjectPrototype() {
1560        return ScriptFunction.getPrototype(builtinObject);
1561    }
1562
1563    ScriptObject getFunctionPrototype() {
1564        return ScriptFunction.getPrototype(builtinFunction);
1565    }
1566
1567    ScriptObject getArrayPrototype() {
1568        return ScriptFunction.getPrototype(builtinArray);
1569    }
1570
1571    ScriptObject getBooleanPrototype() {
1572        return ScriptFunction.getPrototype(builtinBoolean);
1573    }
1574
1575    ScriptObject getNumberPrototype() {
1576        return ScriptFunction.getPrototype(builtinNumber);
1577    }
1578
1579    ScriptObject getDatePrototype() {
1580        return ScriptFunction.getPrototype(getBuiltinDate());
1581    }
1582
1583    ScriptObject getRegExpPrototype() {
1584        return ScriptFunction.getPrototype(getBuiltinRegExp());
1585    }
1586
1587    ScriptObject getStringPrototype() {
1588        return ScriptFunction.getPrototype(builtinString);
1589    }
1590
1591    ScriptObject getErrorPrototype() {
1592        return ScriptFunction.getPrototype(builtinError);
1593    }
1594
1595    ScriptObject getEvalErrorPrototype() {
1596        return ScriptFunction.getPrototype(getBuiltinEvalError());
1597    }
1598
1599    ScriptObject getRangeErrorPrototype() {
1600        return ScriptFunction.getPrototype(getBuiltinRangeError());
1601    }
1602
1603    ScriptObject getReferenceErrorPrototype() {
1604        return ScriptFunction.getPrototype(builtinReferenceError);
1605    }
1606
1607    ScriptObject getSyntaxErrorPrototype() {
1608        return ScriptFunction.getPrototype(builtinSyntaxError);
1609    }
1610
1611    ScriptObject getTypeErrorPrototype() {
1612        return ScriptFunction.getPrototype(builtinTypeError);
1613    }
1614
1615    ScriptObject getURIErrorPrototype() {
1616        return ScriptFunction.getPrototype(getBuiltinURIError());
1617    }
1618
1619    ScriptObject getJavaImporterPrototype() {
1620        return ScriptFunction.getPrototype(getBuiltinJavaImporter());
1621    }
1622
1623    ScriptObject getJSAdapterPrototype() {
1624        return ScriptFunction.getPrototype(getBuiltinJSAdapter());
1625    }
1626
1627    private synchronized ScriptFunction getBuiltinArrayBuffer() {
1628        if (this.builtinArrayBuffer == null) {
1629            this.builtinArrayBuffer = initConstructorAndSwitchPoint("ArrayBuffer", ScriptFunction.class);
1630        }
1631        return this.builtinArrayBuffer;
1632    }
1633
1634    ScriptObject getArrayBufferPrototype() {
1635        return ScriptFunction.getPrototype(getBuiltinArrayBuffer());
1636    }
1637
1638    private synchronized ScriptFunction getBuiltinDataView() {
1639        if (this.builtinDataView == null) {
1640            this.builtinDataView = initConstructorAndSwitchPoint("DataView", ScriptFunction.class);
1641        }
1642        return this.builtinDataView;
1643    }
1644
1645    ScriptObject getDataViewPrototype() {
1646        return ScriptFunction.getPrototype(getBuiltinDataView());
1647    }
1648
1649    private synchronized ScriptFunction getBuiltinInt8Array() {
1650        if (this.builtinInt8Array == null) {
1651            this.builtinInt8Array = initConstructorAndSwitchPoint("Int8Array", ScriptFunction.class);
1652        }
1653        return this.builtinInt8Array;
1654    }
1655
1656    ScriptObject getInt8ArrayPrototype() {
1657        return ScriptFunction.getPrototype(getBuiltinInt8Array());
1658    }
1659
1660    private synchronized ScriptFunction getBuiltinUint8Array() {
1661        if (this.builtinUint8Array == null) {
1662            this.builtinUint8Array = initConstructorAndSwitchPoint("Uint8Array", ScriptFunction.class);
1663        }
1664        return this.builtinUint8Array;
1665    }
1666
1667    ScriptObject getUint8ArrayPrototype() {
1668        return ScriptFunction.getPrototype(getBuiltinUint8Array());
1669    }
1670
1671    private synchronized ScriptFunction getBuiltinUint8ClampedArray() {
1672        if (this.builtinUint8ClampedArray == null) {
1673            this.builtinUint8ClampedArray = initConstructorAndSwitchPoint("Uint8ClampedArray", ScriptFunction.class);
1674        }
1675        return this.builtinUint8ClampedArray;
1676    }
1677
1678    ScriptObject getUint8ClampedArrayPrototype() {
1679        return ScriptFunction.getPrototype(getBuiltinUint8ClampedArray());
1680    }
1681
1682    private synchronized ScriptFunction getBuiltinInt16Array() {
1683        if (this.builtinInt16Array == null) {
1684            this.builtinInt16Array = initConstructorAndSwitchPoint("Int16Array", ScriptFunction.class);
1685        }
1686        return this.builtinInt16Array;
1687    }
1688
1689    ScriptObject getInt16ArrayPrototype() {
1690        return ScriptFunction.getPrototype(getBuiltinInt16Array());
1691    }
1692
1693    private synchronized ScriptFunction getBuiltinUint16Array() {
1694        if (this.builtinUint16Array == null) {
1695            this.builtinUint16Array = initConstructorAndSwitchPoint("Uint16Array", ScriptFunction.class);
1696        }
1697        return this.builtinUint16Array;
1698    }
1699
1700    ScriptObject getUint16ArrayPrototype() {
1701        return ScriptFunction.getPrototype(getBuiltinUint16Array());
1702    }
1703
1704    private synchronized ScriptFunction getBuiltinInt32Array() {
1705        if (this.builtinInt32Array == null) {
1706            this.builtinInt32Array = initConstructorAndSwitchPoint("Int32Array", ScriptFunction.class);
1707        }
1708        return this.builtinInt32Array;
1709    }
1710
1711    ScriptObject getInt32ArrayPrototype() {
1712        return ScriptFunction.getPrototype(getBuiltinInt32Array());
1713    }
1714
1715    private synchronized ScriptFunction getBuiltinUint32Array() {
1716        if (this.builtinUint32Array == null) {
1717            this.builtinUint32Array = initConstructorAndSwitchPoint("Uint32Array", ScriptFunction.class);
1718        }
1719        return this.builtinUint32Array;
1720    }
1721
1722    ScriptObject getUint32ArrayPrototype() {
1723        return ScriptFunction.getPrototype(getBuiltinUint32Array());
1724    }
1725
1726    private synchronized ScriptFunction getBuiltinFloat32Array() {
1727        if (this.builtinFloat32Array == null) {
1728            this.builtinFloat32Array = initConstructorAndSwitchPoint("Float32Array", ScriptFunction.class);
1729        }
1730        return this.builtinFloat32Array;
1731    }
1732
1733    ScriptObject getFloat32ArrayPrototype() {
1734        return ScriptFunction.getPrototype(getBuiltinFloat32Array());
1735    }
1736
1737    private synchronized ScriptFunction getBuiltinFloat64Array() {
1738        if (this.builtinFloat64Array == null) {
1739            this.builtinFloat64Array = initConstructorAndSwitchPoint("Float64Array", ScriptFunction.class);
1740        }
1741        return this.builtinFloat64Array;
1742    }
1743
1744    ScriptObject getFloat64ArrayPrototype() {
1745        return ScriptFunction.getPrototype(getBuiltinFloat64Array());
1746    }
1747
1748    private ScriptFunction getBuiltinArray() {
1749        return builtinArray;
1750    }
1751
1752    ScriptFunction getTypeErrorThrower() {
1753        return typeErrorThrower;
1754    }
1755
1756    /**
1757     * Called from compiled script code to test if builtin has been overridden
1758     *
1759     * @return true if builtin array has not been overridden
1760     */
1761    public static boolean isBuiltinArray() {
1762        final Global instance = Global.instance();
1763        return instance.array == instance.getBuiltinArray();
1764    }
1765
1766    private ScriptFunction getBuiltinBoolean() {
1767        return builtinBoolean;
1768    }
1769
1770    /**
1771     * Called from compiled script code to test if builtin has been overridden
1772     *
1773     * @return true if builtin boolean has not been overridden
1774     */
1775    public static boolean isBuiltinBoolean() {
1776        final Global instance = Global.instance();
1777        return instance._boolean == instance.getBuiltinBoolean();
1778    }
1779
1780    private synchronized ScriptFunction getBuiltinDate() {
1781        if (this.builtinDate == null) {
1782            this.builtinDate = initConstructorAndSwitchPoint("Date", ScriptFunction.class);
1783            final ScriptObject dateProto = ScriptFunction.getPrototype(builtinDate);
1784            // initialize default date
1785            this.DEFAULT_DATE = new NativeDate(NaN, dateProto);
1786        }
1787        return this.builtinDate;
1788    }
1789
1790    /**
1791     * Called from compiled script code to test if builtin has been overridden
1792     *
1793     * @return true if builtin date has not been overridden
1794     */
1795    public static boolean isBuiltinDate() {
1796        final Global instance = Global.instance();
1797        return instance.date == LAZY_SENTINEL || instance.date == instance.getBuiltinDate();
1798    }
1799
1800    private ScriptFunction getBuiltinError() {
1801        return builtinError;
1802    }
1803
1804    /**
1805     * Called from compiled script code to test if builtin has been overridden
1806     *
1807     * @return true if builtin error has not been overridden
1808     */
1809    public static boolean isBuiltinError() {
1810        final Global instance = Global.instance();
1811        return instance.error == instance.getBuiltinError();
1812    }
1813
1814    private synchronized ScriptFunction getBuiltinEvalError() {
1815        if (this.builtinEvalError == null) {
1816            this.builtinEvalError = initErrorSubtype("EvalError", getErrorPrototype());
1817        }
1818        return this.builtinEvalError;
1819    }
1820
1821    /**
1822     * Called from compiled script code to test if builtin has been overridden
1823     *
1824     * @return true if builtin eval error has not been overridden
1825     */
1826    public static boolean isBuiltinEvalError() {
1827        final Global instance = Global.instance();
1828        return instance.evalError == LAZY_SENTINEL || instance.evalError == instance.getBuiltinEvalError();
1829    }
1830
1831    private ScriptFunction getBuiltinFunction() {
1832        return builtinFunction;
1833    }
1834
1835    /**
1836     * Called from compiled script code to test if builtin has been overridden
1837     *
1838     * @return true if builtin function has not been overridden
1839     */
1840    public static boolean isBuiltinFunction() {
1841        final Global instance = Global.instance();
1842        return instance.function == instance.getBuiltinFunction();
1843    }
1844
1845    /**
1846     * Get the switchpoint used to check property changes for Function.prototype.apply
1847     * @return the switchpoint guarding apply (same as guarding call, and everything else in function)
1848     */
1849    public static SwitchPoint getBuiltinFunctionApplySwitchPoint() {
1850        return ScriptFunction.getPrototype(Global.instance().getBuiltinFunction()).getProperty("apply").getBuiltinSwitchPoint();
1851    }
1852
1853    private static boolean isBuiltinFunctionProperty(final String name) {
1854        final Global instance = Global.instance();
1855        final ScriptFunction builtinFunction = instance.getBuiltinFunction();
1856        if (builtinFunction == null) {
1857            return false; //conservative for compile-only mode
1858        }
1859        final boolean isBuiltinFunction = instance.function == builtinFunction;
1860        return isBuiltinFunction && ScriptFunction.getPrototype(builtinFunction).getProperty(name).isBuiltin();
1861    }
1862
1863    /**
1864     * Check if the Function.prototype.apply has not been replaced
1865     * @return true if Function.prototype.apply has been replaced
1866     */
1867    public static boolean isBuiltinFunctionPrototypeApply() {
1868        return isBuiltinFunctionProperty("apply");
1869    }
1870
1871    /**
1872     * Check if the Function.prototype.apply has not been replaced
1873     * @return true if Function.prototype.call has been replaced
1874     */
1875    public static boolean isBuiltinFunctionPrototypeCall() {
1876        return isBuiltinFunctionProperty("call");
1877    }
1878
1879    private synchronized ScriptFunction getBuiltinJSAdapter() {
1880        if (this.builtinJSAdapter == null) {
1881            this.builtinJSAdapter = initConstructorAndSwitchPoint("JSAdapter", ScriptFunction.class);
1882        }
1883        return builtinJSAdapter;
1884    }
1885
1886    /**
1887     * Called from compiled script code to test if builtin has been overridden
1888     *
1889     * @return true if builtin JSAdapter has not been overridden
1890     */
1891    public static boolean isBuiltinJSAdapter() {
1892        final Global instance = Global.instance();
1893        return instance.jsadapter == LAZY_SENTINEL || instance.jsadapter == instance.getBuiltinJSAdapter();
1894    }
1895
1896    private synchronized ScriptObject getBuiltinJSON() {
1897        if (this.builtinJSON == null) {
1898            this.builtinJSON = initConstructorAndSwitchPoint("JSON", ScriptObject.class);
1899        }
1900        return this.builtinJSON;
1901    }
1902
1903    /**
1904     * Called from compiled script code to test if builtin has been overridden
1905     *
1906     * @return true if builtin JSON has has not been overridden
1907     */
1908    public static boolean isBuiltinJSON() {
1909        final Global instance = Global.instance();
1910        return instance.json == LAZY_SENTINEL || instance.json == instance.getBuiltinJSON();
1911    }
1912
1913    private ScriptObject getBuiltinJava() {
1914        return builtinJava;
1915    }
1916
1917    /**
1918     * Called from compiled script code to test if builtin has been overridden
1919     *
1920     * @return true if builtin Java has not been overridden
1921     */
1922    public static boolean isBuiltinJava() {
1923        final Global instance = Global.instance();
1924        return instance.java == instance.getBuiltinJava();
1925    }
1926
1927    private ScriptObject getBuiltinJavax() {
1928        return builtinJavax;
1929    }
1930
1931    /**
1932     * Called from compiled script code to test if builtin has been overridden
1933     *
1934     * @return true if builtin Javax has not been overridden
1935     */
1936    public static boolean isBuiltinJavax() {
1937        final Global instance = Global.instance();
1938        return instance.javax == instance.getBuiltinJavax();
1939    }
1940
1941    private synchronized ScriptFunction getBuiltinJavaImporter() {
1942        if (this.builtinJavaImporter == null) {
1943            this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
1944        }
1945        return this.builtinJavaImporter;
1946    }
1947
1948    private synchronized ScriptObject getBuiltinJavaApi() {
1949        if (this.builtinJavaApi == null) {
1950            this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
1951        }
1952        return this.builtinJavaApi;
1953    }
1954
1955    /**
1956     * Called from compiled script code to test if builtin has been overridden
1957     *
1958     * @return true if builtin Java importer has not been overridden
1959     */
1960    public static boolean isBuiltinJavaImporter() {
1961        final Global instance = Global.instance();
1962        return instance.javaImporter == LAZY_SENTINEL || instance.javaImporter == instance.getBuiltinJavaImporter();
1963    }
1964
1965    /**
1966     * Called from compiled script code to test if builtin has been overridden
1967     *
1968     * @return true if builtin math has not been overridden
1969     */
1970    public static boolean isBuiltinMath() {
1971        final Global instance = Global.instance();
1972        return instance.math == instance.builtinMath;
1973    }
1974
1975    private ScriptFunction getBuiltinNumber() {
1976        return builtinNumber;
1977    }
1978
1979    /**
1980     * Called from compiled script code to test if builtin has been overridden
1981     *
1982     * @return true if builtin number has not been overridden
1983     */
1984    public static boolean isBuiltinNumber() {
1985        final Global instance = Global.instance();
1986        return instance.number == instance.getBuiltinNumber();
1987    }
1988
1989    private ScriptFunction getBuiltinObject() {
1990        return builtinObject;
1991    }
1992
1993    /**
1994     * Called from compiled script code to test if builtin has been overridden
1995     *
1996     * @return true if builtin object has not been overridden
1997     */
1998    public static boolean isBuiltinObject() {
1999        final Global instance = Global.instance();
2000        return instance.object == instance.getBuiltinObject();
2001    }
2002
2003    private ScriptObject getBuiltinPackages() {
2004        return builtinPackages;
2005    }
2006
2007    /**
2008     * Called from compiled script code to test if builtin has been overridden
2009     *
2010     * @return true if builtin package has not been overridden
2011     */
2012    public static boolean isBuiltinPackages() {
2013        final Global instance = Global.instance();
2014        return instance.packages == instance.getBuiltinPackages();
2015    }
2016
2017    private synchronized ScriptFunction getBuiltinRangeError() {
2018        if (this.builtinRangeError == null) {
2019            this.builtinRangeError = initErrorSubtype("RangeError", getErrorPrototype());
2020        }
2021        return builtinRangeError;
2022    }
2023
2024    /**
2025     * Called from compiled script code to test if builtin has been overridden
2026     *
2027     * @return true if builtin range error has not been overridden
2028     */
2029    public static boolean isBuiltinRangeError() {
2030        final Global instance = Global.instance();
2031        return instance.rangeError == LAZY_SENTINEL || instance.rangeError == instance.getBuiltinRangeError();
2032    }
2033
2034    private synchronized ScriptFunction getBuiltinReferenceError() {
2035        return builtinReferenceError;
2036    }
2037
2038    /**
2039     * Called from compiled script code to test if builtin has been overridden
2040     *
2041     * @return true if builtin reference error has not been overridden
2042     */
2043    public static boolean isBuiltinReferenceError() {
2044        final Global instance = Global.instance();
2045        return instance.referenceError == instance.getBuiltinReferenceError();
2046    }
2047
2048    private synchronized ScriptFunction getBuiltinRegExp() {
2049        if (this.builtinRegExp == null) {
2050            this.builtinRegExp = initConstructorAndSwitchPoint("RegExp", ScriptFunction.class);
2051            final ScriptObject regExpProto = ScriptFunction.getPrototype(builtinRegExp);
2052            // initialize default regexp object
2053            this.DEFAULT_REGEXP = new NativeRegExp("(?:)", "", this, regExpProto);
2054            // RegExp.prototype should behave like a RegExp object. So copy the
2055            // properties.
2056            regExpProto.addBoundProperties(DEFAULT_REGEXP);
2057        }
2058        return builtinRegExp;
2059    }
2060
2061    /**
2062     * Called from compiled script code to test if builtin has been overridden
2063     *
2064     * @return true if builtin regexp has not been overridden
2065     */
2066    public static boolean isBuiltinRegExp() {
2067        final Global instance = Global.instance();
2068        return instance.regexp == LAZY_SENTINEL || instance.regexp == instance.getBuiltinRegExp();
2069    }
2070
2071    private ScriptFunction getBuiltinString() {
2072        return builtinString;
2073    }
2074
2075    /**
2076     * Called from compiled script code to test if builtin has been overridden
2077     *
2078     * @return true if builtin Java has not been overridden
2079     */
2080    public static boolean isBuiltinString() {
2081        final Global instance = Global.instance();
2082        return instance.string == instance.getBuiltinString();
2083    }
2084
2085    private ScriptFunction getBuiltinSyntaxError() {
2086        return builtinSyntaxError;
2087    }
2088
2089    /**
2090     * Called from compiled script code to test if builtin has been overridden
2091     *
2092     * @return true if builtin syntax error has not been overridden
2093     */
2094    public static boolean isBuiltinSyntaxError() {
2095        final Global instance = Global.instance();
2096        return instance.syntaxError == instance.getBuiltinSyntaxError();
2097    }
2098
2099    private ScriptFunction getBuiltinTypeError() {
2100        return builtinTypeError;
2101    }
2102
2103    /**
2104     * Called from compiled script code to test if builtin has been overridden
2105     *
2106     * @return true if builtin type error has not been overridden
2107     */
2108    public static boolean isBuiltinTypeError() {
2109        final Global instance = Global.instance();
2110        return instance.typeError == instance.getBuiltinTypeError();
2111    }
2112
2113    private synchronized ScriptFunction getBuiltinURIError() {
2114        if (this.builtinURIError == null) {
2115            this.builtinURIError = initErrorSubtype("URIError", getErrorPrototype());
2116        }
2117        return this.builtinURIError;
2118    }
2119
2120    /**
2121     * Called from compiled script code to test if builtin has been overridden
2122     *
2123     * @return true if builtin URI error has not been overridden
2124     */
2125    public static boolean isBuiltinURIError() {
2126        final Global instance = Global.instance();
2127        return instance.uriError == LAZY_SENTINEL || instance.uriError == instance.getBuiltinURIError();
2128    }
2129
2130    @Override
2131    public String getClassName() {
2132        return "global";
2133    }
2134
2135    /**
2136     * Copy function used to clone NativeRegExp objects.
2137     *
2138     * @param regexp a NativeRegExp to clone
2139     *
2140     * @return copy of the given regexp object
2141     */
2142    public static Object regExpCopy(final Object regexp) {
2143        return new NativeRegExp((NativeRegExp)regexp);
2144    }
2145
2146    /**
2147     * Convert given object to NativeRegExp type.
2148     *
2149     * @param obj object to be converted
2150     * @return NativeRegExp instance
2151     */
2152    public static NativeRegExp toRegExp(final Object obj) {
2153        if (obj instanceof NativeRegExp) {
2154            return (NativeRegExp)obj;
2155        }
2156        return new NativeRegExp(JSType.toString(obj));
2157    }
2158
2159    /**
2160     * ECMA 9.9 ToObject implementation
2161     *
2162     * @param obj  an item for which to run ToObject
2163     * @return ToObject version of given item
2164     */
2165    public static Object toObject(final Object obj) {
2166        if (obj == null || obj == UNDEFINED) {
2167            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2168        }
2169
2170        if (obj instanceof ScriptObject) {
2171            return obj;
2172        }
2173
2174        return instance().wrapAsObject(obj);
2175    }
2176
2177    /**
2178     * Allocate a new object array.
2179     *
2180     * @param initial object values.
2181     * @return the new array
2182     */
2183    public static NativeArray allocate(final Object[] initial) {
2184        ArrayData arrayData = ArrayData.allocate(initial);
2185
2186        for (int index = 0; index < initial.length; index++) {
2187            final Object value = initial[index];
2188
2189            if (value == ScriptRuntime.EMPTY) {
2190                arrayData = arrayData.delete(index);
2191            }
2192        }
2193
2194        return new NativeArray(arrayData);
2195    }
2196
2197    /**
2198     * Allocate a new number array.
2199     *
2200     * @param initial number values.
2201     * @return the new array
2202     */
2203    public static NativeArray allocate(final double[] initial) {
2204        return new NativeArray(ArrayData.allocate(initial));
2205    }
2206
2207    /**
2208     * Allocate a new long array.
2209     *
2210     * @param initial number values.
2211     * @return the new array
2212     */
2213    public static NativeArray allocate(final long[] initial) {
2214        return new NativeArray(ArrayData.allocate(initial));
2215    }
2216
2217    /**
2218     * Allocate a new integer array.
2219     *
2220     * @param initial number values.
2221     * @return the new array
2222     */
2223    public static NativeArray allocate(final int[] initial) {
2224        return new NativeArray(ArrayData.allocate(initial));
2225    }
2226
2227    /**
2228     * Allocate a new object array for arguments.
2229     *
2230     * @param arguments initial arguments passed.
2231     * @param callee reference to the function that uses arguments object
2232     * @param numParams actual number of declared parameters
2233     *
2234     * @return the new array
2235     */
2236    public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
2237        return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
2238    }
2239
2240    /**
2241     * Called from generated to check if given function is the builtin 'eval'. If
2242     * eval is used in a script, a lot of optimizations and assumptions cannot be done.
2243     *
2244     * @param  fn function object that is checked
2245     * @return true if fn is the builtin eval
2246     */
2247    public static boolean isEval(final Object fn) {
2248        return fn == Global.instance().builtinEval;
2249    }
2250
2251    /**
2252     * Called from generated to replace a location property placeholder with the actual location property value.
2253     *
2254     * @param  placeholder the value tested for being a placeholder for a location property
2255     * @param  locationProperty the actual value for the location property
2256     * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
2257     */
2258    public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
2259        return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
2260    }
2261
2262    /**
2263     * Called from runtime internals to check if the passed value is a location property placeholder.
2264     * @param  placeholder the value tested for being a placeholder for a location property
2265     * @return true if the value is a placeholder, false otherwise.
2266     */
2267    public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
2268        return placeholder == LOCATION_PROPERTY_PLACEHOLDER;
2269    }
2270
2271    /**
2272     * Create a new RegExp object.
2273     *
2274     * @param expression Regular expression.
2275     * @param options    Search options.
2276     *
2277     * @return New RegExp object.
2278     */
2279    public static Object newRegExp(final String expression, final String options) {
2280        if (options == null) {
2281            return new NativeRegExp(expression);
2282        }
2283        return new NativeRegExp(expression, options);
2284    }
2285
2286    /**
2287     * Get the object prototype
2288     *
2289     * @return the object prototype
2290     */
2291    public static ScriptObject objectPrototype() {
2292        return Global.instance().getObjectPrototype();
2293    }
2294
2295    /**
2296     * Create a new empty object instance.
2297     *
2298     * @return New empty object.
2299     */
2300    public static ScriptObject newEmptyInstance() {
2301        return Global.instance().newObject();
2302    }
2303
2304    /**
2305     * Check if a given object is a ScriptObject, raises an exception if this is
2306     * not the case
2307     *
2308     * @param obj and object to check
2309     * @return the script object
2310     */
2311    public static ScriptObject checkObject(final Object obj) {
2312        if (!(obj instanceof ScriptObject)) {
2313            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2314        }
2315        return (ScriptObject)obj;
2316    }
2317
2318    /**
2319     * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
2320     * if this object is null or undefined.
2321     *
2322     * @param obj an object to check
2323     */
2324    public static void checkObjectCoercible(final Object obj) {
2325        if (obj == null || obj == UNDEFINED) {
2326            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2327        }
2328    }
2329
2330    /**
2331     * Get the current split state.
2332     *
2333     * @return current split state
2334     */
2335    @Override
2336    public int getSplitState() {
2337        return splitState;
2338    }
2339
2340    /**
2341     * Set the current split state.
2342     *
2343     * @param state current split state
2344     */
2345    @Override
2346    public void setSplitState(final int state) {
2347        splitState = state;
2348    }
2349
2350    /**
2351     * Return the ES6 global scope for lexically declared bindings.
2352     * @return the ES6 lexical global scope.
2353     */
2354    public final ScriptObject getLexicalScope() {
2355        assert context.getEnv()._es6;
2356        return lexicalScope;
2357    }
2358
2359    @Override
2360    public void addBoundProperties(final ScriptObject source, final jdk.nashorn.internal.runtime.Property[] properties) {
2361        PropertyMap ownMap = getMap();
2362        LexicalScope lexScope = null;
2363        PropertyMap lexicalMap = null;
2364        boolean hasLexicalDefinitions = false;
2365
2366        if (context.getEnv()._es6) {
2367            lexScope = (LexicalScope) getLexicalScope();
2368            lexicalMap = lexScope.getMap();
2369
2370            for (final jdk.nashorn.internal.runtime.Property property : properties) {
2371                if (property.isLexicalBinding()) {
2372                    hasLexicalDefinitions = true;
2373                }
2374                // ES6 15.1.8 steps 6. and 7.
2375                final jdk.nashorn.internal.runtime.Property globalProperty = ownMap.findProperty(property.getKey());
2376                if (globalProperty != null && !globalProperty.isConfigurable() && property.isLexicalBinding()) {
2377                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2378                }
2379                final jdk.nashorn.internal.runtime.Property lexicalProperty = lexicalMap.findProperty(property.getKey());
2380                if (lexicalProperty != null && !property.isConfigurable()) {
2381                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2382                }
2383            }
2384        }
2385
2386        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2387            if (property.isLexicalBinding()) {
2388                assert lexScope != null;
2389                lexicalMap = lexScope.addBoundProperty(lexicalMap, source, property);
2390
2391                if (ownMap.findProperty(property.getKey()) != null) {
2392                    // If property exists in the global object invalidate any global constant call sites.
2393                    invalidateGlobalConstant(property.getKey());
2394                }
2395            } else {
2396                ownMap = addBoundProperty(ownMap, source, property);
2397            }
2398        }
2399
2400        setMap(ownMap);
2401
2402        if (hasLexicalDefinitions) {
2403            assert lexScope != null;
2404            lexScope.setMap(lexicalMap);
2405            invalidateLexicalSwitchPoint();
2406        }
2407    }
2408
2409    @Override
2410    public GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2411        final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2412        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2413
2414        if (lexicalScope != null && isScope && !NashornCallSiteDescriptor.isApplyToCall(desc)) {
2415            if (lexicalScope.hasOwnProperty(name)) {
2416                return lexicalScope.findGetMethod(desc, request, operator);
2417            }
2418        }
2419
2420        final GuardedInvocation invocation =  super.findGetMethod(desc, request, operator);
2421
2422        // We want to avoid adding our generic lexical scope switchpoint to global constant invocations,
2423        // because those are invalidated per-key in the addBoundProperties method above.
2424        // We therefor check if the invocation does already have a switchpoint and the property is non-inherited,
2425        // assuming this only applies to global constants. If other non-inherited properties will
2426        // start using switchpoints some time in the future we'll have to revisit this.
2427        if (isScope && context.getEnv()._es6 && (invocation.getSwitchPoints() == null || !hasOwnProperty(name))) {
2428            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2429        }
2430
2431        return invocation;
2432    }
2433
2434    @Override
2435    protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) {
2436        if (lexicalScope != null && start != this && start.isScope()) {
2437            final FindProperty find = lexicalScope.findProperty(key, false);
2438            if (find != null) {
2439                return find;
2440            }
2441        }
2442        return super.findProperty(key, deep, start);
2443    }
2444
2445    @Override
2446    public GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2447        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2448
2449        if (lexicalScope != null && isScope) {
2450            final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2451            if (lexicalScope.hasOwnProperty(name)) {
2452                return lexicalScope.findSetMethod(desc, request);
2453            }
2454        }
2455
2456        final GuardedInvocation invocation = super.findSetMethod(desc, request);
2457
2458        if (isScope && context.getEnv()._es6) {
2459            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2460        }
2461
2462        return invocation;
2463    }
2464
2465    /**
2466     * Adds jjs shell interactive mode builtin functions to global scope.
2467     */
2468    public void addShellBuiltins() {
2469        Object value = ScriptFunctionImpl.makeFunction("input", ShellFunctions.INPUT);
2470        addOwnProperty("input", Attribute.NOT_ENUMERABLE, value);
2471
2472        value = ScriptFunctionImpl.makeFunction("evalinput", ShellFunctions.EVALINPUT);
2473        addOwnProperty("evalinput", Attribute.NOT_ENUMERABLE, value);
2474    }
2475
2476    private synchronized SwitchPoint getLexicalScopeSwitchPoint() {
2477        SwitchPoint switchPoint = lexicalScopeSwitchPoint;
2478        if (switchPoint == null || switchPoint.hasBeenInvalidated()) {
2479            switchPoint = lexicalScopeSwitchPoint = new SwitchPoint();
2480        }
2481        return switchPoint;
2482    }
2483
2484    private synchronized void invalidateLexicalSwitchPoint() {
2485        if (lexicalScopeSwitchPoint != null) {
2486            context.getLogger(GlobalConstants.class).info("Invalidating non-constant globals on lexical scope update");
2487            SwitchPoint.invalidateAll(new SwitchPoint[]{ lexicalScopeSwitchPoint });
2488        }
2489    }
2490
2491
2492    @SuppressWarnings("unused")
2493    private static Object lexicalScopeFilter(final Object self) {
2494        if (self instanceof Global) {
2495            return ((Global) self).getLexicalScope();
2496        }
2497        return self;
2498    }
2499
2500    private <T extends ScriptObject> T initConstructorAndSwitchPoint(final String name, final Class<T> clazz) {
2501        final T func = initConstructor(name, clazz);
2502        tagBuiltinProperties(name, func);
2503        return func;
2504    }
2505
2506    private void init(final ScriptEngine eng) {
2507        assert Context.getGlobal() == this : "this global is not set as current";
2508
2509        final ScriptEnvironment env = getContext().getEnv();
2510
2511        // initialize Function and Object constructor
2512        initFunctionAndObject();
2513
2514        // Now fix Global's own proto.
2515        this.setInitialProto(getObjectPrototype());
2516
2517        // initialize global function properties
2518        this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
2519
2520        this.parseInt = ScriptFunctionImpl.makeFunction("parseInt",   GlobalFunctions.PARSEINT,
2521                    new Specialization[] {
2522                    new Specialization(GlobalFunctions.PARSEINT_Z),
2523                    new Specialization(GlobalFunctions.PARSEINT_I),
2524                    new Specialization(GlobalFunctions.PARSEINT_J),
2525                    new Specialization(GlobalFunctions.PARSEINT_OI),
2526                    new Specialization(GlobalFunctions.PARSEINT_O) });
2527        this.parseFloat = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2528        this.isNaN = ScriptFunctionImpl.makeFunction("isNaN",   GlobalFunctions.IS_NAN,
2529                   new Specialization[] {
2530                        new Specialization(GlobalFunctions.IS_NAN_I),
2531                        new Specialization(GlobalFunctions.IS_NAN_J),
2532                        new Specialization(GlobalFunctions.IS_NAN_D) });
2533        this.parseFloat         = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2534        this.isNaN              = ScriptFunctionImpl.makeFunction("isNaN",      GlobalFunctions.IS_NAN);
2535        this.isFinite           = ScriptFunctionImpl.makeFunction("isFinite",   GlobalFunctions.IS_FINITE);
2536        this.encodeURI          = ScriptFunctionImpl.makeFunction("encodeURI",  GlobalFunctions.ENCODE_URI);
2537        this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
2538        this.decodeURI          = ScriptFunctionImpl.makeFunction("decodeURI",  GlobalFunctions.DECODE_URI);
2539        this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
2540        this.escape             = ScriptFunctionImpl.makeFunction("escape",     GlobalFunctions.ESCAPE);
2541        this.unescape           = ScriptFunctionImpl.makeFunction("unescape",   GlobalFunctions.UNESCAPE);
2542        this.print              = ScriptFunctionImpl.makeFunction("print",      env._print_no_newline ? PRINT : PRINTLN);
2543        this.load               = ScriptFunctionImpl.makeFunction("load",       LOAD);
2544        this.loadWithNewGlobal  = ScriptFunctionImpl.makeFunction("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL);
2545        this.exit               = ScriptFunctionImpl.makeFunction("exit",       EXIT);
2546        this.quit               = ScriptFunctionImpl.makeFunction("quit",       EXIT);
2547
2548        // built-in constructors
2549        this.builtinArray     = initConstructorAndSwitchPoint("Array", ScriptFunction.class);
2550        this.builtinBoolean   = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class);
2551        this.builtinNumber    = initConstructorAndSwitchPoint("Number", ScriptFunction.class);
2552        this.builtinString    = initConstructorAndSwitchPoint("String", ScriptFunction.class);
2553        this.builtinMath      = initConstructorAndSwitchPoint("Math", ScriptObject.class);
2554
2555        // initialize String.prototype.length to 0
2556        // add String.prototype.length
2557        final ScriptObject stringPrototype = getStringPrototype();
2558        stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
2559
2560        // set isArray flag on Array.prototype
2561        final ScriptObject arrayPrototype = getArrayPrototype();
2562        arrayPrototype.setIsArray();
2563
2564        // Error stuff
2565        initErrorObjects();
2566
2567        // java access
2568        if (! env._no_java) {
2569            this.javaApi = LAZY_SENTINEL;
2570            this.javaImporter = LAZY_SENTINEL;
2571            initJavaAccess();
2572        }
2573
2574        if (! env._no_typed_arrays) {
2575            this.arrayBuffer       = LAZY_SENTINEL;
2576            this.dataView          = LAZY_SENTINEL;
2577            this.int8Array         = LAZY_SENTINEL;
2578            this.uint8Array        = LAZY_SENTINEL;
2579            this.uint8ClampedArray = LAZY_SENTINEL;
2580            this.int16Array        = LAZY_SENTINEL;
2581            this.uint16Array       = LAZY_SENTINEL;
2582            this.int32Array        = LAZY_SENTINEL;
2583            this.uint32Array       = LAZY_SENTINEL;
2584            this.float32Array      = LAZY_SENTINEL;
2585            this.float64Array      = LAZY_SENTINEL;
2586        }
2587
2588        if (env._scripting) {
2589            initScripting(env);
2590        }
2591
2592        if (Context.DEBUG) {
2593            boolean debugOkay;
2594            final SecurityManager sm = System.getSecurityManager();
2595            if (sm != null) {
2596                try {
2597                    sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
2598                    debugOkay = true;
2599                } catch (final SecurityException ignored) {
2600                    // if no permission, don't initialize Debug object
2601                    debugOkay = false;
2602                }
2603
2604            } else {
2605                debugOkay = true;
2606            }
2607
2608            if (debugOkay) {
2609                initDebug();
2610            }
2611        }
2612
2613        copyBuiltins();
2614
2615        // expose script (command line) arguments as "arguments" property of global
2616        arguments = wrapAsObject(env.getArguments().toArray());
2617        if (env._scripting) {
2618            // synonym for "arguments" in scripting mode
2619            addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
2620        }
2621
2622        if (eng != null) {
2623            // default file name
2624            addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
2625            // __noSuchProperty__ hook for ScriptContext search of missing variables
2626            final ScriptFunction noSuchProp = ScriptFunctionImpl.makeStrictFunction(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
2627            addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
2628        }
2629    }
2630
2631    private void initErrorObjects() {
2632        // Error objects
2633        this.builtinError = initConstructor("Error", ScriptFunction.class);
2634        final ScriptObject errorProto = getErrorPrototype();
2635
2636        // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
2637        final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
2638        final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
2639        errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
2640        final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
2641        final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
2642        errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
2643        final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
2644        final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
2645        errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
2646        final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
2647        final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
2648        errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
2649
2650        // ECMA 15.11.4.2 Error.prototype.name
2651        // Error.prototype.name = "Error";
2652        errorProto.set(NativeError.NAME, "Error", 0);
2653        // ECMA 15.11.4.3 Error.prototype.message
2654        // Error.prototype.message = "";
2655        errorProto.set(NativeError.MESSAGE, "", 0);
2656
2657        tagBuiltinProperties("Error", builtinError);
2658
2659        this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
2660        this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
2661        this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
2662    }
2663
2664    private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
2665        final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
2666        final ScriptObject prototype = ScriptFunction.getPrototype(cons);
2667        prototype.set(NativeError.NAME, name, 0);
2668        prototype.set(NativeError.MESSAGE, "", 0);
2669        prototype.setInitialProto(errorProto);
2670        tagBuiltinProperties(name, cons);
2671        return cons;
2672    }
2673
2674    private void initJavaAccess() {
2675        final ScriptObject objectProto = getObjectPrototype();
2676        this.builtinPackages = new NativeJavaPackage("", objectProto);
2677        this.builtinCom = new NativeJavaPackage("com", objectProto);
2678        this.builtinEdu = new NativeJavaPackage("edu", objectProto);
2679        this.builtinJava = new NativeJavaPackage("java", objectProto);
2680        this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
2681        this.builtinJavax = new NativeJavaPackage("javax", objectProto);
2682        this.builtinOrg = new NativeJavaPackage("org", objectProto);
2683    }
2684
2685    private void initScripting(final ScriptEnvironment scriptEnv) {
2686        Object value;
2687        value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
2688        addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
2689
2690        value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
2691        addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
2692
2693        final String execName = ScriptingFunctions.EXEC_NAME;
2694        value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
2695        addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
2696
2697        // Nashorn extension: global.echo (scripting-mode-only)
2698        // alias for "print"
2699        value = get("print");
2700        addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
2701
2702        // Nashorn extension: global.$OPTIONS (scripting-mode-only)
2703        final ScriptObject options = newObject();
2704        copyOptions(options, scriptEnv);
2705        addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
2706
2707        // Nashorn extension: global.$ENV (scripting-mode-only)
2708        if (System.getSecurityManager() == null) {
2709            // do not fill $ENV if we have a security manager around
2710            // Retrieve current state of ENV variables.
2711            final ScriptObject env = newObject();
2712            env.putAll(System.getenv(), scriptEnv._strict);
2713
2714            // Some platforms, e.g., Windows, do not define the PWD environment
2715            // variable, so that the $ENV.PWD property needs to be explicitly
2716            // set.
2717            if (!env.containsKey(ScriptingFunctions.PWD_NAME)) {
2718                env.put(ScriptingFunctions.PWD_NAME, System.getProperty("user.dir"), scriptEnv._strict);
2719            }
2720
2721            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
2722        } else {
2723            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2724        }
2725
2726        // add other special properties for exec support
2727        addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2728        addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2729        addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2730    }
2731
2732    private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
2733        for (final Field f : scriptEnv.getClass().getFields()) {
2734            try {
2735                options.set(f.getName(), f.get(scriptEnv), 0);
2736            } catch (final IllegalArgumentException | IllegalAccessException exp) {
2737                throw new RuntimeException(exp);
2738            }
2739        }
2740    }
2741
2742    private void copyBuiltins() {
2743        this.array             = this.builtinArray;
2744        this._boolean          = this.builtinBoolean;
2745        this.error             = this.builtinError;
2746        this.function          = this.builtinFunction;
2747        this.com               = this.builtinCom;
2748        this.edu               = this.builtinEdu;
2749        this.java              = this.builtinJava;
2750        this.javafx            = this.builtinJavafx;
2751        this.javax             = this.builtinJavax;
2752        this.org               = this.builtinOrg;
2753        this.math              = this.builtinMath;
2754        this.number            = this.builtinNumber;
2755        this.object            = this.builtinObject;
2756        this.packages          = this.builtinPackages;
2757        this.referenceError    = this.builtinReferenceError;
2758        this.string            = this.builtinString;
2759        this.syntaxError       = this.builtinSyntaxError;
2760        this.typeError         = this.builtinTypeError;
2761    }
2762
2763    private void initDebug() {
2764        this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
2765    }
2766
2767    private Object printImpl(final boolean newLine, final Object... objects) {
2768        final ScriptContext sc = currentContext();
2769        @SuppressWarnings("resource")
2770        final PrintWriter out = sc != null? new PrintWriter(sc.getWriter()) : getContext().getEnv().getOut();
2771        final StringBuilder sb = new StringBuilder();
2772
2773        for (final Object obj : objects) {
2774            if (sb.length() != 0) {
2775                sb.append(' ');
2776            }
2777
2778            sb.append(JSType.toString(obj));
2779        }
2780
2781        // Print all at once to ensure thread friendly result.
2782        if (newLine) {
2783            out.println(sb.toString());
2784        } else {
2785            out.print(sb.toString());
2786        }
2787
2788        out.flush();
2789
2790        return UNDEFINED;
2791    }
2792
2793    private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
2794        try {
2795            // Assuming class name pattern for built-in JS constructors.
2796            final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
2797
2798            sb.append("Native");
2799            sb.append(name);
2800            sb.append("$Constructor");
2801
2802            final Class<?> funcClass = Class.forName(sb.toString());
2803            final T res = clazz.cast(funcClass.newInstance());
2804
2805            if (res instanceof ScriptFunction) {
2806                // All global constructor prototypes are not-writable,
2807                // not-enumerable and not-configurable.
2808                final ScriptFunction func = (ScriptFunction)res;
2809                func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
2810            }
2811
2812            if (res.getProto() == null) {
2813                res.setInitialProto(getObjectPrototype());
2814            }
2815
2816            res.setIsBuiltin();
2817
2818            return res;
2819        } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
2820            throw new RuntimeException(e);
2821        }
2822    }
2823
2824    private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) {
2825        final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>();
2826
2827        list.addAll(Arrays.asList(func.getMap().getProperties()));
2828
2829        if (func instanceof ScriptFunction) {
2830            final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func);
2831            if (proto != null) {
2832                list.addAll(Arrays.asList(proto.getMap().getProperties()));
2833            }
2834        }
2835
2836        final jdk.nashorn.internal.runtime.Property prop = getProperty(name);
2837        if (prop != null) {
2838            list.add(prop);
2839        }
2840
2841        return list;
2842    }
2843
2844    /**
2845     * Given a builtin object, traverse its properties recursively and associate them with a name that
2846     * will be a key to their invalidation switchpoint.
2847     * @param name name for key
2848     * @param func builtin script object
2849     */
2850    private void tagBuiltinProperties(final String name, final ScriptObject func) {
2851        SwitchPoint sp = context.getBuiltinSwitchPoint(name);
2852        if (sp == null) {
2853            sp = context.newBuiltinSwitchPoint(name);
2854        }
2855
2856        //get all builtin properties in this builtin object and register switchpoints keyed on the propery name,
2857        //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc
2858        for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) {
2859            prop.setBuiltinSwitchPoint(sp);
2860        }
2861    }
2862
2863    // Function and Object constructors are inter-dependent. Also,
2864    // Function.prototype
2865    // functions are not properly initialized. We fix the references here.
2866    // NOTE: be careful if you want to re-order the operations here. You may
2867    // have
2868    // to play with object references carefully!!
2869    private void initFunctionAndObject() {
2870        // First-n-foremost is Function
2871
2872        this.builtinFunction = initConstructor("Function", ScriptFunction.class);
2873
2874        // create global anonymous function
2875        final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
2876        // need to copy over members of Function.prototype to anon function
2877        anon.addBoundProperties(getFunctionPrototype());
2878
2879        // Function.prototype === Object.getPrototypeOf(Function) ===
2880        // <anon-function>
2881        builtinFunction.setInitialProto(anon);
2882        builtinFunction.setPrototype(anon);
2883        anon.set("constructor", builtinFunction, 0);
2884        anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
2885
2886        // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
2887        this.typeErrorThrower = new ScriptFunctionImpl("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER, null, null, 0);
2888        typeErrorThrower.setPrototype(UNDEFINED);
2889        // Non-constructor built-in functions do not have "prototype" property
2890        typeErrorThrower.deleteOwnProperty(typeErrorThrower.getMap().findProperty("prototype"));
2891        typeErrorThrower.preventExtensions();
2892
2893        // now initialize Object
2894        this.builtinObject = initConstructor("Object", ScriptFunction.class);
2895        final ScriptObject ObjectPrototype = getObjectPrototype();
2896        // Object.getPrototypeOf(Function.prototype) === Object.prototype
2897        anon.setInitialProto(ObjectPrototype);
2898
2899        // ES6 draft compliant __proto__ property of Object.prototype
2900        // accessors on Object.prototype for "__proto__"
2901        final ScriptFunction getProto = ScriptFunctionImpl.makeFunction("getProto", NativeObject.GET__PROTO__);
2902        final ScriptFunction setProto = ScriptFunctionImpl.makeFunction("setProto", NativeObject.SET__PROTO__);
2903        ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
2904
2905        // Function valued properties of Function.prototype were not properly
2906        // initialized. Because, these were created before global.function and
2907        // global.object were not initialized.
2908        jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
2909        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2910            final Object key = property.getKey();
2911            final Object value = builtinFunction.get(key);
2912
2913            if (value instanceof ScriptFunction && value != anon) {
2914                final ScriptFunction func = (ScriptFunction)value;
2915                func.setInitialProto(getFunctionPrototype());
2916                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2917                if (prototype != null) {
2918                    prototype.setInitialProto(ObjectPrototype);
2919                }
2920            }
2921        }
2922
2923        // For function valued properties of Object and Object.prototype, make
2924        // sure prototype's proto chain ends with Object.prototype
2925        for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
2926            final Object key = property.getKey();
2927            final Object value = builtinObject.get(key);
2928
2929            if (value instanceof ScriptFunction) {
2930                final ScriptFunction func = (ScriptFunction)value;
2931                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2932                if (prototype != null) {
2933                    prototype.setInitialProto(ObjectPrototype);
2934                }
2935            }
2936        }
2937
2938        properties = getObjectPrototype().getMap().getProperties();
2939
2940        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2941            final Object key   = property.getKey();
2942            if (key.equals("constructor")) {
2943                continue;
2944            }
2945
2946            final Object value = ObjectPrototype.get(key);
2947            if (value instanceof ScriptFunction) {
2948                final ScriptFunction func = (ScriptFunction)value;
2949                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2950                if (prototype != null) {
2951                    prototype.setInitialProto(ObjectPrototype);
2952                }
2953            }
2954        }
2955
2956        tagBuiltinProperties("Object", builtinObject);
2957        tagBuiltinProperties("Function", builtinFunction);
2958        tagBuiltinProperties("Function", anon);
2959    }
2960
2961    private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
2962        return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
2963    }
2964
2965    RegExpResult getLastRegExpResult() {
2966        return lastRegExpResult;
2967    }
2968
2969    void setLastRegExpResult(final RegExpResult regExpResult) {
2970        this.lastRegExpResult = regExpResult;
2971    }
2972
2973    @Override
2974    protected boolean isGlobal() {
2975        return true;
2976    }
2977
2978    /**
2979     * A class representing the ES6 global lexical scope.
2980     */
2981    private static class LexicalScope extends ScriptObject {
2982
2983        LexicalScope(final Global global) {
2984            super(global, PropertyMap.newMap());
2985        }
2986
2987        @Override
2988        protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2989            return filterInvocation(super.findGetMethod(desc, request, operator));
2990        }
2991
2992        @Override
2993        protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2994            return filterInvocation(super.findSetMethod(desc, request));
2995        }
2996
2997        @Override
2998        protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property) {
2999            // We override this method just to make it callable by Global
3000            return super.addBoundProperty(propMap, source, property);
3001        }
3002
3003        private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) {
3004            final MethodType type = invocation.getInvocation().type();
3005            return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER);
3006        }
3007    }
3008
3009}
3010