Global.java revision 1407:ad3c4bdf0cf6 
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 Scope {
91    // This special value is used to flag a lazily initialized global property.
92    // This also serves as placeholder value used in place of a location property
93    // (__FILE__, __DIR__, __LINE__)
94    private static final Object LAZY_SENTINEL = new Object();
95
96    private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
97    private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
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 static 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 static 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 static 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 static final Object __FILE__ = LAZY_SENTINEL;
834
835    /** Nashorn extension: current script's directory */
836    @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
837    public static final Object __DIR__ = LAZY_SENTINEL;
838
839    /** Nashorn extension: current source line number being executed */
840    @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
841    public static final Object __LINE__ = LAZY_SENTINEL;
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    // Used to store the last RegExp result to support deprecated RegExp constructor properties
910    private RegExpResult lastRegExpResult;
911
912    private static final MethodHandle EVAL                 = findOwnMH_S("eval",                Object.class, Object.class, Object.class);
913    private static final MethodHandle NO_SUCH_PROPERTY     = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
914    private static final MethodHandle PRINT                = findOwnMH_S("print",               Object.class, Object.class, Object[].class);
915    private static final MethodHandle PRINTLN              = findOwnMH_S("println",             Object.class, Object.class, Object[].class);
916    private static final MethodHandle LOAD                 = findOwnMH_S("load",                Object.class, Object.class, Object.class);
917    private static final MethodHandle LOAD_WITH_NEW_GLOBAL = findOwnMH_S("loadWithNewGlobal",   Object.class, Object.class, Object[].class);
918    private static final MethodHandle EXIT                 = findOwnMH_S("exit",                Object.class, Object.class, Object.class);
919    private static final MethodHandle LEXICAL_SCOPE_FILTER = findOwnMH_S("lexicalScopeFilter",  Object.class, Object.class);
920
921    // initialized by nasgen
922    private static PropertyMap $nasgenmap$;
923
924    // context to which this global belongs to
925    private final Context context;
926
927    // current ScriptContext to use - can be null.
928    private ThreadLocal<ScriptContext> scontext;
929    // current ScriptEngine associated - can be null.
930    private ScriptEngine engine;
931    // initial ScriptContext - can be null
932    private volatile ScriptContext initscontext;
933
934    // ES6 global lexical scope.
935    private final LexicalScope lexicalScope;
936
937    // Switchpoint for non-constant global callsites in the presence of ES6 lexical scope.
938    private SwitchPoint lexicalScopeSwitchPoint;
939
940    /**
941     * Set the current script context
942     * @param ctxt script context
943     */
944    public void setScriptContext(final ScriptContext ctxt) {
945        assert scontext != null;
946        scontext.set(ctxt);
947    }
948
949    /**
950     * Get the current script context
951     * @return current script context
952     */
953    public ScriptContext getScriptContext() {
954        assert scontext != null;
955        return scontext.get();
956    }
957
958    private ScriptContext currentContext() {
959        final ScriptContext sc = scontext != null? scontext.get() : null;
960        return sc == null? initscontext : sc;
961    }
962
963    @Override
964    protected Context getContext() {
965        return context;
966    }
967
968    @Override
969    protected boolean useDualFields() {
970        return context.useDualFields();
971    }
972
973    // performs initialization checks for Global constructor and returns the
974    // PropertyMap, if everything is fine.
975    private static PropertyMap checkAndGetMap(final Context context) {
976        // security check first
977        final SecurityManager sm = System.getSecurityManager();
978        if (sm != null) {
979            sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
980        }
981
982        Objects.requireNonNull(context);
983
984        return $nasgenmap$;
985    }
986
987    /**
988     * Constructor
989     *
990     * @param context the context
991     */
992    public Global(final Context context) {
993        super(checkAndGetMap(context));
994        this.context = context;
995        this.lexicalScope = context.getEnv()._es6 ? new LexicalScope(this) : null;
996    }
997
998    /**
999     * Script access to "current" Global instance
1000     *
1001     * @return the global singleton
1002     */
1003    public static Global instance() {
1004        return Objects.requireNonNull(Context.getGlobal());
1005    }
1006
1007    private static Global instanceFrom(final Object self) {
1008        return self instanceof Global? (Global)self : instance();
1009    }
1010
1011    /**
1012     * Check if we have a Global instance
1013     * @return true if one exists
1014     */
1015    public static boolean hasInstance() {
1016        return Context.getGlobal() != null;
1017    }
1018
1019    /**
1020     * Script access to {@link ScriptEnvironment}
1021     *
1022     * @return the script environment
1023     */
1024    static ScriptEnvironment getEnv() {
1025        return instance().getContext().getEnv();
1026    }
1027
1028    /**
1029     * Script access to {@link Context}
1030     *
1031     * @return the context
1032     */
1033    static Context getThisContext() {
1034        return instance().getContext();
1035    }
1036
1037    // Runtime interface to Global
1038
1039    /**
1040     * Is there a class filter in the current Context?
1041     * @return class filter
1042     */
1043    public ClassFilter getClassFilter() {
1044        return context.getClassFilter();
1045    }
1046
1047    /**
1048     * Is this global of the given Context?
1049     * @param ctxt the context
1050     * @return true if this global belongs to the given Context
1051     */
1052    public boolean isOfContext(final Context ctxt) {
1053        return this.context == ctxt;
1054    }
1055
1056    /**
1057     * Does this global belong to a strict Context?
1058     * @return true if this global belongs to a strict Context
1059     */
1060    public boolean isStrictContext() {
1061        return context.getEnv()._strict;
1062    }
1063
1064    /**
1065     * Initialize standard builtin objects like "Object", "Array", "Function" etc.
1066     * as well as our extension builtin objects like "Java", "JSAdapter" as properties
1067     * of the global scope object.
1068     *
1069     * @param eng ScriptEngine to initialize
1070     * @param ctxt ScriptContext to initialize
1071     */
1072    public void initBuiltinObjects(final ScriptEngine eng, final ScriptContext ctxt) {
1073        if (this.builtinObject != null) {
1074            // already initialized, just return
1075            return;
1076        }
1077
1078        this.engine = eng;
1079        this.initscontext = ctxt;
1080        if (this.engine != null) {
1081            this.scontext = new ThreadLocal<>();
1082        }
1083        init(eng);
1084    }
1085
1086    /**
1087     * Wrap a Java object as corresponding script object
1088     *
1089     * @param obj object to wrap
1090     * @return    wrapped object
1091     */
1092    public Object wrapAsObject(final Object obj) {
1093        if (obj instanceof Boolean) {
1094            return new NativeBoolean((Boolean)obj, this);
1095        } else if (obj instanceof Number) {
1096            return new NativeNumber(((Number)obj).doubleValue(), this);
1097        } else if (isString(obj)) {
1098            return new NativeString((CharSequence)obj, this);
1099        } else if (obj instanceof Object[]) { // extension
1100            return new NativeArray(ArrayData.allocate((Object[])obj), this);
1101        } else if (obj instanceof double[]) { // extension
1102            return new NativeArray(ArrayData.allocate((double[])obj), this);
1103        } else if (obj instanceof long[]) {
1104            return new NativeArray(ArrayData.allocate((long[])obj), this);
1105        } else if (obj instanceof int[]) {
1106            return new NativeArray(ArrayData.allocate((int[]) obj), this);
1107        } else if (obj instanceof ArrayData) {
1108            return new NativeArray((ArrayData) obj, this);
1109        } else {
1110            // FIXME: more special cases? Map? List?
1111            return obj;
1112        }
1113    }
1114
1115    /**
1116     * Lookup helper for JS primitive types
1117     *
1118     * @param request the link request for the dynamic call site.
1119     * @param self     self reference
1120     *
1121     * @return guarded invocation
1122     */
1123    public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
1124        if (isString(self)) {
1125            return NativeString.lookupPrimitive(request, self);
1126        } else if (self instanceof Number) {
1127            return NativeNumber.lookupPrimitive(request, self);
1128        } else if (self instanceof Boolean) {
1129            return NativeBoolean.lookupPrimitive(request, self);
1130        }
1131        throw new IllegalArgumentException("Unsupported primitive: " + self);
1132    }
1133
1134    /**
1135     * Returns a method handle that creates a wrapper object for a JS primitive value.
1136     *
1137     * @param self receiver object
1138     * @return method handle to create wrapper objects for primitive receiver
1139     */
1140    public static MethodHandle getPrimitiveWrapFilter(final Object self) {
1141        if (isString(self)) {
1142            return NativeString.WRAPFILTER;
1143        } else if (self instanceof Number) {
1144            return NativeNumber.WRAPFILTER;
1145        } else if (self instanceof Boolean) {
1146            return NativeBoolean.WRAPFILTER;
1147        }
1148        throw new IllegalArgumentException("Unsupported primitive: " + self);
1149    }
1150
1151
1152    /**
1153     * Create a new empty script object
1154     *
1155     * @return the new ScriptObject
1156     */
1157    public ScriptObject newObject() {
1158        return useDualFields() ? new JD(getObjectPrototype()) : new JO(getObjectPrototype());
1159    }
1160
1161    /**
1162     * Default value of given type
1163     *
1164     * @param sobj     script object
1165     * @param typeHint type hint
1166     *
1167     * @return default value
1168     */
1169    public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
1170        // When the [[DefaultValue]] internal method of O is called with no hint,
1171        // then it behaves as if the hint were Number, unless O is a Date object
1172        // in which case it behaves as if the hint were String.
1173        Class<?> hint = typeHint;
1174        if (hint == null) {
1175            hint = Number.class;
1176        }
1177
1178        try {
1179            if (hint == String.class) {
1180
1181                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1182
1183                if (Bootstrap.isCallable(toString)) {
1184                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1185                    if (JSType.isPrimitive(value)) {
1186                        return value;
1187                    }
1188                }
1189
1190                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1191                if (Bootstrap.isCallable(valueOf)) {
1192                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1193                    if (JSType.isPrimitive(value)) {
1194                        return value;
1195                    }
1196                }
1197                throw typeError(this, "cannot.get.default.string");
1198            }
1199
1200            if (hint == Number.class) {
1201                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1202                if (Bootstrap.isCallable(valueOf)) {
1203                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1204                    if (JSType.isPrimitive(value)) {
1205                        return value;
1206                    }
1207                }
1208
1209                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1210                if (Bootstrap.isCallable(toString)) {
1211                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1212                    if (JSType.isPrimitive(value)) {
1213                        return value;
1214                    }
1215                }
1216
1217                throw typeError(this, "cannot.get.default.number");
1218            }
1219        } catch (final RuntimeException | Error e) {
1220            throw e;
1221        } catch (final Throwable t) {
1222            throw new RuntimeException(t);
1223        }
1224
1225        return UNDEFINED;
1226    }
1227
1228    /**
1229     * Is the given ScriptObject an ECMAScript Error object?
1230     *
1231     * @param sobj the object being checked
1232     * @return true if sobj is an Error object
1233     */
1234    public boolean isError(final ScriptObject sobj) {
1235        final ScriptObject errorProto = getErrorPrototype();
1236        ScriptObject proto = sobj.getProto();
1237        while (proto != null) {
1238            if (proto == errorProto) {
1239                return true;
1240            }
1241            proto = proto.getProto();
1242        }
1243        return false;
1244    }
1245
1246    /**
1247     * Create a new ECMAScript Error object.
1248     *
1249     * @param msg error message
1250     * @return newly created Error object
1251     */
1252    public ScriptObject newError(final String msg) {
1253        return new NativeError(msg, this);
1254    }
1255
1256    /**
1257     * Create a new ECMAScript EvalError object.
1258     *
1259     * @param msg error message
1260     * @return newly created EvalError object
1261     */
1262    public ScriptObject newEvalError(final String msg) {
1263        return new NativeEvalError(msg, this);
1264    }
1265
1266    /**
1267     * Create a new ECMAScript RangeError object.
1268     *
1269     * @param msg error message
1270     * @return newly created RangeError object
1271     */
1272    public ScriptObject newRangeError(final String msg) {
1273        return new NativeRangeError(msg, this);
1274    }
1275
1276    /**
1277     * Create a new ECMAScript ReferenceError object.
1278     *
1279     * @param msg error message
1280     * @return newly created ReferenceError object
1281     */
1282    public ScriptObject newReferenceError(final String msg) {
1283        return new NativeReferenceError(msg, this);
1284    }
1285
1286    /**
1287     * Create a new ECMAScript SyntaxError object.
1288     *
1289     * @param msg error message
1290     * @return newly created SyntaxError object
1291     */
1292    public ScriptObject newSyntaxError(final String msg) {
1293        return new NativeSyntaxError(msg, this);
1294    }
1295
1296    /**
1297     * Create a new ECMAScript TypeError object.
1298     *
1299     * @param msg error message
1300     * @return newly created TypeError object
1301     */
1302    public ScriptObject newTypeError(final String msg) {
1303        return new NativeTypeError(msg, this);
1304    }
1305
1306    /**
1307     * Create a new ECMAScript URIError object.
1308     *
1309     * @param msg error message
1310     * @return newly created URIError object
1311     */
1312    public ScriptObject newURIError(final String msg) {
1313        return new NativeURIError(msg, this);
1314    }
1315
1316    /**
1317     * Create a new ECMAScript GenericDescriptor object.
1318     *
1319     * @param configurable is the property configurable?
1320     * @param enumerable is the property enumerable?
1321     * @return newly created GenericDescriptor object
1322     */
1323    public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
1324        return new GenericPropertyDescriptor(configurable, enumerable, this);
1325    }
1326
1327    /**
1328     * Create a new ECMAScript DatePropertyDescriptor object.
1329     *
1330     * @param value of the data property
1331     * @param configurable is the property configurable?
1332     * @param enumerable is the property enumerable?
1333     * @param writable is the property writable?
1334     * @return newly created DataPropertyDescriptor object
1335     */
1336    public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
1337        return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
1338    }
1339
1340    /**
1341     * Create a new ECMAScript AccessorPropertyDescriptor object.
1342     *
1343     * @param get getter function of the user accessor property
1344     * @param set setter function of the user accessor property
1345     * @param configurable is the property configurable?
1346     * @param enumerable is the property enumerable?
1347     * @return newly created AccessorPropertyDescriptor object
1348     */
1349    public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
1350        final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
1351
1352        if (get == null) {
1353            desc.delete(PropertyDescriptor.GET, false);
1354        }
1355
1356        if (set == null) {
1357            desc.delete(PropertyDescriptor.SET, false);
1358        }
1359
1360        return desc;
1361    }
1362
1363    private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
1364        final T obj = map.get(key);
1365        if (obj != null) {
1366            return obj;
1367        }
1368
1369        try {
1370            final T newObj = creator.call();
1371            final T existingObj = map.putIfAbsent(key, newObj);
1372            return existingObj != null ? existingObj : newObj;
1373        } catch (final Exception exp) {
1374            throw new RuntimeException(exp);
1375        }
1376    }
1377
1378    private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
1379
1380
1381    /**
1382     * Get cached InvokeByName object for the given key
1383     * @param key key to be associated with InvokeByName object
1384     * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
1385     * @return InvokeByName object associated with the key.
1386     */
1387    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
1388        return getLazilyCreatedValue(key, creator, namedInvokers);
1389    }
1390
1391    private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
1392
1393    /**
1394     * Get cached dynamic method handle for the given key
1395     * @param key key to be associated with dynamic method handle
1396     * @param creator if method handle is absent 'creator' is called to make one (lazy init)
1397     * @return dynamic method handle associated with the key.
1398     */
1399    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
1400        return getLazilyCreatedValue(key, creator, dynamicInvokers);
1401    }
1402
1403    /**
1404     * Hook to search missing variables in ScriptContext if available
1405     * @param self used to detect if scope call or not (this function is 'strict')
1406     * @param name name of the variable missing
1407     * @return value of the missing variable or undefined (or TypeError for scope search)
1408     */
1409    public static Object __noSuchProperty__(final Object self, final Object name) {
1410        final Global global = Global.instance();
1411        final ScriptContext sctxt = global.currentContext();
1412        final String nameStr = name.toString();
1413
1414        if (sctxt != null) {
1415            final int scope = sctxt.getAttributesScope(nameStr);
1416            if (scope != -1) {
1417                return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
1418            }
1419        }
1420
1421        switch (nameStr) {
1422        case "context":
1423            return sctxt;
1424        case "engine":
1425            return global.engine;
1426        default:
1427            break;
1428        }
1429
1430        if (self == UNDEFINED) {
1431            // scope access and so throw ReferenceError
1432            throw referenceError(global, "not.defined", nameStr);
1433        }
1434
1435        return UNDEFINED;
1436    }
1437
1438    /**
1439     * This is the eval used when 'indirect' eval call is made.
1440     *
1441     * var global = this;
1442     * global.eval("print('hello')");
1443     *
1444     * @param self  eval scope
1445     * @param str   eval string
1446     *
1447     * @return the result of eval
1448     */
1449    public static Object eval(final Object self, final Object str) {
1450        return directEval(self, str, Global.instanceFrom(self), UNDEFINED, false);
1451    }
1452
1453    /**
1454     * Direct eval
1455     *
1456     * @param self     The scope of eval passed as 'self'
1457     * @param str      Evaluated code
1458     * @param callThis "this" to be passed to the evaluated code
1459     * @param location location of the eval call
1460     * @param strict   is eval called from a strict mode code?
1461     *
1462     * @return the return value of the eval
1463     *
1464     * This is directly invoked from generated when eval(code) is called in user code
1465     */
1466    public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
1467        if (!isString(str)) {
1468            return str;
1469        }
1470        final Global global = Global.instanceFrom(self);
1471        final ScriptObject scope = self instanceof ScriptObject && ((ScriptObject)self).isScope() ? (ScriptObject)self : global;
1472
1473        return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
1474    }
1475
1476    /**
1477     * Global print implementation - Nashorn extension
1478     *
1479     * @param self    scope
1480     * @param objects arguments to print
1481     *
1482     * @return result of print (undefined)
1483     */
1484    public static Object print(final Object self, final Object... objects) {
1485        return Global.instanceFrom(self).printImpl(false, objects);
1486    }
1487
1488    /**
1489     * Global println implementation - Nashorn extension
1490     *
1491     * @param self    scope
1492     * @param objects arguments to print
1493     *
1494     * @return result of println (undefined)
1495     */
1496    public static Object println(final Object self, final Object... objects) {
1497        return Global.instanceFrom(self).printImpl(true, objects);
1498    }
1499
1500    /**
1501     * Global load implementation - Nashorn extension.
1502     *
1503     * <p>
1504     * load builtin loads the given script. Script source can be a URL or a File
1505     * or a script object with name and script properties. Evaluated code gets
1506     * global object "this" and uses global object as scope for evaluation.
1507     * </p>
1508     * <p>
1509     * If self is undefined or null or global, then global object is used
1510     * as scope as well as "this" for the evaluated code. If self is any other
1511     * object, then it is indirect load call. With indirect load call, the
1512     * properties of scope are available to evaluated script as variables. Also,
1513     * global scope properties are accessible. Any var, function definition in
1514     * evaluated script goes into an object that is not accessible to user scripts.
1515     * </p>
1516     * Thus the indirect load call is equivalent to the following:
1517     * <pre>
1518     * <code>
1519     * (function (scope, source) {
1520     *    with(scope) {
1521     *        eval(&lt;script_from_source&gt;);
1522     *    }
1523     * })(self, source);
1524     * </code>
1525     * </pre>
1526     *
1527     * @param self    scope to use for the script evaluation
1528     * @param source  script source
1529     *
1530     * @return result of load (may be undefined)
1531     *
1532     * @throws IOException if source could not be read
1533     */
1534    public static Object load(final Object self, final Object source) throws IOException {
1535        final Global global = Global.instanceFrom(self);
1536        return global.getContext().load(self, source);
1537    }
1538
1539    /**
1540     * Global loadWithNewGlobal implementation - Nashorn extension.
1541     *
1542     * loadWithNewGlobal builtin loads the given script from a URL or a File
1543     * or a script object with name and script properties. Evaluated code gets
1544     * new global object "this" and uses that new global object as scope for evaluation.
1545     *
1546     * @param self self This value is ignored by this function
1547     * @param args optional arguments to be passed to the loaded script
1548     *
1549     * @return result of load (may be undefined)
1550     *
1551     * @throws IOException if source could not be read
1552     */
1553    public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
1554        final Global global = Global.instanceFrom(self);
1555        final int length = args.length;
1556        final boolean hasArgs = 0 < length;
1557        final Object from = hasArgs ? args[0] : UNDEFINED;
1558        final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
1559
1560        return global.getContext().loadWithNewGlobal(from, arguments);
1561    }
1562
1563    /**
1564     * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
1565     *
1566     * @param self  self reference
1567     * @param code  exit code
1568     *
1569     * @return undefined (will never be reached)
1570     */
1571    public static Object exit(final Object self, final Object code) {
1572        System.exit(JSType.toInt32(code));
1573        return UNDEFINED;
1574    }
1575
1576    // builtin prototype accessors
1577
1578    /**
1579     * Get the builtin Object prototype.
1580     * @return the object prototype.
1581     */
1582    public ScriptObject getObjectPrototype() {
1583        return ScriptFunction.getPrototype(builtinObject);
1584    }
1585
1586    ScriptObject getFunctionPrototype() {
1587        return ScriptFunction.getPrototype(builtinFunction);
1588    }
1589
1590    ScriptObject getArrayPrototype() {
1591        return ScriptFunction.getPrototype(builtinArray);
1592    }
1593
1594    ScriptObject getBooleanPrototype() {
1595        return ScriptFunction.getPrototype(builtinBoolean);
1596    }
1597
1598    ScriptObject getNumberPrototype() {
1599        return ScriptFunction.getPrototype(builtinNumber);
1600    }
1601
1602    ScriptObject getDatePrototype() {
1603        return ScriptFunction.getPrototype(getBuiltinDate());
1604    }
1605
1606    ScriptObject getRegExpPrototype() {
1607        return ScriptFunction.getPrototype(getBuiltinRegExp());
1608    }
1609
1610    ScriptObject getStringPrototype() {
1611        return ScriptFunction.getPrototype(builtinString);
1612    }
1613
1614    ScriptObject getErrorPrototype() {
1615        return ScriptFunction.getPrototype(builtinError);
1616    }
1617
1618    ScriptObject getEvalErrorPrototype() {
1619        return ScriptFunction.getPrototype(getBuiltinEvalError());
1620    }
1621
1622    ScriptObject getRangeErrorPrototype() {
1623        return ScriptFunction.getPrototype(getBuiltinRangeError());
1624    }
1625
1626    ScriptObject getReferenceErrorPrototype() {
1627        return ScriptFunction.getPrototype(builtinReferenceError);
1628    }
1629
1630    ScriptObject getSyntaxErrorPrototype() {
1631        return ScriptFunction.getPrototype(builtinSyntaxError);
1632    }
1633
1634    ScriptObject getTypeErrorPrototype() {
1635        return ScriptFunction.getPrototype(builtinTypeError);
1636    }
1637
1638    ScriptObject getURIErrorPrototype() {
1639        return ScriptFunction.getPrototype(getBuiltinURIError());
1640    }
1641
1642    ScriptObject getJavaImporterPrototype() {
1643        return ScriptFunction.getPrototype(getBuiltinJavaImporter());
1644    }
1645
1646    ScriptObject getJSAdapterPrototype() {
1647        return ScriptFunction.getPrototype(getBuiltinJSAdapter());
1648    }
1649
1650    private synchronized ScriptFunction getBuiltinArrayBuffer() {
1651        if (this.builtinArrayBuffer == null) {
1652            this.builtinArrayBuffer = initConstructorAndSwitchPoint("ArrayBuffer", ScriptFunction.class);
1653        }
1654        return this.builtinArrayBuffer;
1655    }
1656
1657    ScriptObject getArrayBufferPrototype() {
1658        return ScriptFunction.getPrototype(getBuiltinArrayBuffer());
1659    }
1660
1661    private synchronized ScriptFunction getBuiltinDataView() {
1662        if (this.builtinDataView == null) {
1663            this.builtinDataView = initConstructorAndSwitchPoint("DataView", ScriptFunction.class);
1664        }
1665        return this.builtinDataView;
1666    }
1667
1668    ScriptObject getDataViewPrototype() {
1669        return ScriptFunction.getPrototype(getBuiltinDataView());
1670    }
1671
1672    private synchronized ScriptFunction getBuiltinInt8Array() {
1673        if (this.builtinInt8Array == null) {
1674            this.builtinInt8Array = initConstructorAndSwitchPoint("Int8Array", ScriptFunction.class);
1675        }
1676        return this.builtinInt8Array;
1677    }
1678
1679    ScriptObject getInt8ArrayPrototype() {
1680        return ScriptFunction.getPrototype(getBuiltinInt8Array());
1681    }
1682
1683    private synchronized ScriptFunction getBuiltinUint8Array() {
1684        if (this.builtinUint8Array == null) {
1685            this.builtinUint8Array = initConstructorAndSwitchPoint("Uint8Array", ScriptFunction.class);
1686        }
1687        return this.builtinUint8Array;
1688    }
1689
1690    ScriptObject getUint8ArrayPrototype() {
1691        return ScriptFunction.getPrototype(getBuiltinUint8Array());
1692    }
1693
1694    private synchronized ScriptFunction getBuiltinUint8ClampedArray() {
1695        if (this.builtinUint8ClampedArray == null) {
1696            this.builtinUint8ClampedArray = initConstructorAndSwitchPoint("Uint8ClampedArray", ScriptFunction.class);
1697        }
1698        return this.builtinUint8ClampedArray;
1699    }
1700
1701    ScriptObject getUint8ClampedArrayPrototype() {
1702        return ScriptFunction.getPrototype(getBuiltinUint8ClampedArray());
1703    }
1704
1705    private synchronized ScriptFunction getBuiltinInt16Array() {
1706        if (this.builtinInt16Array == null) {
1707            this.builtinInt16Array = initConstructorAndSwitchPoint("Int16Array", ScriptFunction.class);
1708        }
1709        return this.builtinInt16Array;
1710    }
1711
1712    ScriptObject getInt16ArrayPrototype() {
1713        return ScriptFunction.getPrototype(getBuiltinInt16Array());
1714    }
1715
1716    private synchronized ScriptFunction getBuiltinUint16Array() {
1717        if (this.builtinUint16Array == null) {
1718            this.builtinUint16Array = initConstructorAndSwitchPoint("Uint16Array", ScriptFunction.class);
1719        }
1720        return this.builtinUint16Array;
1721    }
1722
1723    ScriptObject getUint16ArrayPrototype() {
1724        return ScriptFunction.getPrototype(getBuiltinUint16Array());
1725    }
1726
1727    private synchronized ScriptFunction getBuiltinInt32Array() {
1728        if (this.builtinInt32Array == null) {
1729            this.builtinInt32Array = initConstructorAndSwitchPoint("Int32Array", ScriptFunction.class);
1730        }
1731        return this.builtinInt32Array;
1732    }
1733
1734    ScriptObject getInt32ArrayPrototype() {
1735        return ScriptFunction.getPrototype(getBuiltinInt32Array());
1736    }
1737
1738    private synchronized ScriptFunction getBuiltinUint32Array() {
1739        if (this.builtinUint32Array == null) {
1740            this.builtinUint32Array = initConstructorAndSwitchPoint("Uint32Array", ScriptFunction.class);
1741        }
1742        return this.builtinUint32Array;
1743    }
1744
1745    ScriptObject getUint32ArrayPrototype() {
1746        return ScriptFunction.getPrototype(getBuiltinUint32Array());
1747    }
1748
1749    private synchronized ScriptFunction getBuiltinFloat32Array() {
1750        if (this.builtinFloat32Array == null) {
1751            this.builtinFloat32Array = initConstructorAndSwitchPoint("Float32Array", ScriptFunction.class);
1752        }
1753        return this.builtinFloat32Array;
1754    }
1755
1756    ScriptObject getFloat32ArrayPrototype() {
1757        return ScriptFunction.getPrototype(getBuiltinFloat32Array());
1758    }
1759
1760    private synchronized ScriptFunction getBuiltinFloat64Array() {
1761        if (this.builtinFloat64Array == null) {
1762            this.builtinFloat64Array = initConstructorAndSwitchPoint("Float64Array", ScriptFunction.class);
1763        }
1764        return this.builtinFloat64Array;
1765    }
1766
1767    ScriptObject getFloat64ArrayPrototype() {
1768        return ScriptFunction.getPrototype(getBuiltinFloat64Array());
1769    }
1770
1771    ScriptFunction getTypeErrorThrower() {
1772        return typeErrorThrower;
1773    }
1774
1775    private synchronized ScriptFunction getBuiltinDate() {
1776        if (this.builtinDate == null) {
1777            this.builtinDate = initConstructorAndSwitchPoint("Date", ScriptFunction.class);
1778            final ScriptObject dateProto = ScriptFunction.getPrototype(builtinDate);
1779            // initialize default date
1780            this.DEFAULT_DATE = new NativeDate(NaN, dateProto);
1781        }
1782        return this.builtinDate;
1783    }
1784
1785    private synchronized ScriptFunction getBuiltinEvalError() {
1786        if (this.builtinEvalError == null) {
1787            this.builtinEvalError = initErrorSubtype("EvalError", getErrorPrototype());
1788        }
1789        return this.builtinEvalError;
1790    }
1791
1792    private ScriptFunction getBuiltinFunction() {
1793        return builtinFunction;
1794    }
1795
1796    /**
1797     * Get the switchpoint used to check property changes for Function.prototype.apply
1798     * @return the switchpoint guarding apply (same as guarding call, and everything else in function)
1799     */
1800    public static SwitchPoint getBuiltinFunctionApplySwitchPoint() {
1801        return ScriptFunction.getPrototype(Global.instance().getBuiltinFunction()).getProperty("apply").getBuiltinSwitchPoint();
1802    }
1803
1804    private static boolean isBuiltinFunctionProperty(final String name) {
1805        final Global instance = Global.instance();
1806        final ScriptFunction builtinFunction = instance.getBuiltinFunction();
1807        if (builtinFunction == null) {
1808            return false; //conservative for compile-only mode
1809        }
1810        final boolean isBuiltinFunction = instance.function == builtinFunction;
1811        return isBuiltinFunction && ScriptFunction.getPrototype(builtinFunction).getProperty(name).isBuiltin();
1812    }
1813
1814    /**
1815     * Check if the Function.prototype.apply has not been replaced
1816     * @return true if Function.prototype.apply has been replaced
1817     */
1818    public static boolean isBuiltinFunctionPrototypeApply() {
1819        return isBuiltinFunctionProperty("apply");
1820    }
1821
1822    /**
1823     * Check if the Function.prototype.apply has not been replaced
1824     * @return true if Function.prototype.call has been replaced
1825     */
1826    public static boolean isBuiltinFunctionPrototypeCall() {
1827        return isBuiltinFunctionProperty("call");
1828    }
1829
1830    private synchronized ScriptFunction getBuiltinJSAdapter() {
1831        if (this.builtinJSAdapter == null) {
1832            this.builtinJSAdapter = initConstructorAndSwitchPoint("JSAdapter", ScriptFunction.class);
1833        }
1834        return builtinJSAdapter;
1835    }
1836
1837    private synchronized ScriptObject getBuiltinJSON() {
1838        if (this.builtinJSON == null) {
1839            this.builtinJSON = initConstructorAndSwitchPoint("JSON", ScriptObject.class);
1840        }
1841        return this.builtinJSON;
1842    }
1843
1844    private synchronized ScriptFunction getBuiltinJavaImporter() {
1845        if (this.builtinJavaImporter == null) {
1846            this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
1847        }
1848        return this.builtinJavaImporter;
1849    }
1850
1851    private synchronized ScriptObject getBuiltinJavaApi() {
1852        if (this.builtinJavaApi == null) {
1853            this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
1854        }
1855        return this.builtinJavaApi;
1856    }
1857
1858    private synchronized ScriptFunction getBuiltinRangeError() {
1859        if (this.builtinRangeError == null) {
1860            this.builtinRangeError = initErrorSubtype("RangeError", getErrorPrototype());
1861        }
1862        return builtinRangeError;
1863    }
1864
1865    private synchronized ScriptFunction getBuiltinRegExp() {
1866        if (this.builtinRegExp == null) {
1867            this.builtinRegExp = initConstructorAndSwitchPoint("RegExp", ScriptFunction.class);
1868            final ScriptObject regExpProto = ScriptFunction.getPrototype(builtinRegExp);
1869            // initialize default regexp object
1870            this.DEFAULT_REGEXP = new NativeRegExp("(?:)", "", this, regExpProto);
1871            // RegExp.prototype should behave like a RegExp object. So copy the
1872            // properties.
1873            regExpProto.addBoundProperties(DEFAULT_REGEXP);
1874        }
1875        return builtinRegExp;
1876    }
1877
1878    private synchronized ScriptFunction getBuiltinURIError() {
1879        if (this.builtinURIError == null) {
1880            this.builtinURIError = initErrorSubtype("URIError", getErrorPrototype());
1881        }
1882        return this.builtinURIError;
1883    }
1884
1885    @Override
1886    public String getClassName() {
1887        return "global";
1888    }
1889
1890    /**
1891     * Copy function used to clone NativeRegExp objects.
1892     *
1893     * @param regexp a NativeRegExp to clone
1894     *
1895     * @return copy of the given regexp object
1896     */
1897    public static Object regExpCopy(final Object regexp) {
1898        return new NativeRegExp((NativeRegExp)regexp);
1899    }
1900
1901    /**
1902     * Convert given object to NativeRegExp type.
1903     *
1904     * @param obj object to be converted
1905     * @return NativeRegExp instance
1906     */
1907    public static NativeRegExp toRegExp(final Object obj) {
1908        if (obj instanceof NativeRegExp) {
1909            return (NativeRegExp)obj;
1910        }
1911        return new NativeRegExp(JSType.toString(obj));
1912    }
1913
1914    /**
1915     * ECMA 9.9 ToObject implementation
1916     *
1917     * @param obj  an item for which to run ToObject
1918     * @return ToObject version of given item
1919     */
1920    public static Object toObject(final Object obj) {
1921        if (obj == null || obj == UNDEFINED) {
1922            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
1923        }
1924
1925        if (obj instanceof ScriptObject) {
1926            return obj;
1927        }
1928
1929        return instance().wrapAsObject(obj);
1930    }
1931
1932    /**
1933     * Allocate a new object array.
1934     *
1935     * @param initial object values.
1936     * @return the new array
1937     */
1938    public static NativeArray allocate(final Object[] initial) {
1939        ArrayData arrayData = ArrayData.allocate(initial);
1940
1941        for (int index = 0; index < initial.length; index++) {
1942            final Object value = initial[index];
1943
1944            if (value == ScriptRuntime.EMPTY) {
1945                arrayData = arrayData.delete(index);
1946            }
1947        }
1948
1949        return new NativeArray(arrayData);
1950    }
1951
1952    /**
1953     * Allocate a new number array.
1954     *
1955     * @param initial number values.
1956     * @return the new array
1957     */
1958    public static NativeArray allocate(final double[] initial) {
1959        return new NativeArray(ArrayData.allocate(initial));
1960    }
1961
1962    /**
1963     * Allocate a new long array.
1964     *
1965     * @param initial number values.
1966     * @return the new array
1967     */
1968    public static NativeArray allocate(final long[] initial) {
1969        return new NativeArray(ArrayData.allocate(initial));
1970    }
1971
1972    /**
1973     * Allocate a new integer array.
1974     *
1975     * @param initial number values.
1976     * @return the new array
1977     */
1978    public static NativeArray allocate(final int[] initial) {
1979        return new NativeArray(ArrayData.allocate(initial));
1980    }
1981
1982    /**
1983     * Allocate a new object array for arguments.
1984     *
1985     * @param arguments initial arguments passed.
1986     * @param callee reference to the function that uses arguments object
1987     * @param numParams actual number of declared parameters
1988     *
1989     * @return the new array
1990     */
1991    public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
1992        return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
1993    }
1994
1995    /**
1996     * Called from generated to check if given function is the builtin 'eval'. If
1997     * eval is used in a script, a lot of optimizations and assumptions cannot be done.
1998     *
1999     * @param  fn function object that is checked
2000     * @return true if fn is the builtin eval
2001     */
2002    public static boolean isEval(final Object fn) {
2003        return fn == Global.instance().builtinEval;
2004    }
2005
2006    /**
2007     * Called from generated to replace a location property placeholder with the actual location property value.
2008     *
2009     * @param  placeholder the value tested for being a placeholder for a location property
2010     * @param  locationProperty the actual value for the location property
2011     * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
2012     */
2013    public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
2014        return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
2015    }
2016
2017    /**
2018     * Called from runtime internals to check if the passed value is a location property placeholder.
2019     * @param  placeholder the value tested for being a placeholder for a location property
2020     * @return true if the value is a placeholder, false otherwise.
2021     */
2022    public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
2023        return placeholder == LAZY_SENTINEL;
2024    }
2025
2026    /**
2027     * Create a new RegExp object.
2028     *
2029     * @param expression Regular expression.
2030     * @param options    Search options.
2031     *
2032     * @return New RegExp object.
2033     */
2034    public static Object newRegExp(final String expression, final String options) {
2035        if (options == null) {
2036            return new NativeRegExp(expression);
2037        }
2038        return new NativeRegExp(expression, options);
2039    }
2040
2041    /**
2042     * Get the object prototype
2043     *
2044     * @return the object prototype
2045     */
2046    public static ScriptObject objectPrototype() {
2047        return Global.instance().getObjectPrototype();
2048    }
2049
2050    /**
2051     * Create a new empty object instance.
2052     *
2053     * @return New empty object.
2054     */
2055    public static ScriptObject newEmptyInstance() {
2056        return Global.instance().newObject();
2057    }
2058
2059    /**
2060     * Check if a given object is a ScriptObject, raises an exception if this is
2061     * not the case
2062     *
2063     * @param obj and object to check
2064     * @return the script object
2065     */
2066    public static ScriptObject checkObject(final Object obj) {
2067        if (!(obj instanceof ScriptObject)) {
2068            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2069        }
2070        return (ScriptObject)obj;
2071    }
2072
2073    /**
2074     * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
2075     * if this object is null or undefined.
2076     *
2077     * @param obj an object to check
2078     */
2079    public static void checkObjectCoercible(final Object obj) {
2080        if (obj == null || obj == UNDEFINED) {
2081            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2082        }
2083    }
2084
2085    /**
2086     * Return the ES6 global scope for lexically declared bindings.
2087     * @return the ES6 lexical global scope.
2088     */
2089    public final ScriptObject getLexicalScope() {
2090        assert context.getEnv()._es6;
2091        return lexicalScope;
2092    }
2093
2094    @Override
2095    public void addBoundProperties(final ScriptObject source, final jdk.nashorn.internal.runtime.Property[] properties) {
2096        PropertyMap ownMap = getMap();
2097        LexicalScope lexScope = null;
2098        PropertyMap lexicalMap = null;
2099        boolean hasLexicalDefinitions = false;
2100
2101        if (context.getEnv()._es6) {
2102            lexScope = (LexicalScope) getLexicalScope();
2103            lexicalMap = lexScope.getMap();
2104
2105            for (final jdk.nashorn.internal.runtime.Property property : properties) {
2106                if (property.isLexicalBinding()) {
2107                    hasLexicalDefinitions = true;
2108                }
2109                // ES6 15.1.8 steps 6. and 7.
2110                final jdk.nashorn.internal.runtime.Property globalProperty = ownMap.findProperty(property.getKey());
2111                if (globalProperty != null && !globalProperty.isConfigurable() && property.isLexicalBinding()) {
2112                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2113                }
2114                final jdk.nashorn.internal.runtime.Property lexicalProperty = lexicalMap.findProperty(property.getKey());
2115                if (lexicalProperty != null && !property.isConfigurable()) {
2116                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2117                }
2118            }
2119        }
2120
2121        final boolean extensible = isExtensible();
2122        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2123            if (property.isLexicalBinding()) {
2124                assert lexScope != null;
2125                lexicalMap = lexScope.addBoundProperty(lexicalMap, source, property, true);
2126
2127                if (ownMap.findProperty(property.getKey()) != null) {
2128                    // If property exists in the global object invalidate any global constant call sites.
2129                    invalidateGlobalConstant(property.getKey());
2130                }
2131            } else {
2132                ownMap = addBoundProperty(ownMap, source, property, extensible);
2133            }
2134        }
2135
2136        setMap(ownMap);
2137
2138        if (hasLexicalDefinitions) {
2139            assert lexScope != null;
2140            lexScope.setMap(lexicalMap);
2141            invalidateLexicalSwitchPoint();
2142        }
2143    }
2144
2145    @Override
2146    public GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2147        final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2148        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2149
2150        if (lexicalScope != null && isScope && !NashornCallSiteDescriptor.isApplyToCall(desc)) {
2151            if (lexicalScope.hasOwnProperty(name)) {
2152                return lexicalScope.findGetMethod(desc, request, operator);
2153            }
2154        }
2155
2156        final GuardedInvocation invocation =  super.findGetMethod(desc, request, operator);
2157
2158        // We want to avoid adding our generic lexical scope switchpoint to global constant invocations,
2159        // because those are invalidated per-key in the addBoundProperties method above.
2160        // We therefor check if the invocation does already have a switchpoint and the property is non-inherited,
2161        // assuming this only applies to global constants. If other non-inherited properties will
2162        // start using switchpoints some time in the future we'll have to revisit this.
2163        if (isScope && context.getEnv()._es6 && (invocation.getSwitchPoints() == null || !hasOwnProperty(name))) {
2164            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2165        }
2166
2167        return invocation;
2168    }
2169
2170    @Override
2171    protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) {
2172        if (lexicalScope != null && start != this && start.isScope()) {
2173            final FindProperty find = lexicalScope.findProperty(key, false);
2174            if (find != null) {
2175                return find;
2176            }
2177        }
2178        return super.findProperty(key, deep, start);
2179    }
2180
2181    @Override
2182    public GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2183        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2184
2185        if (lexicalScope != null && isScope) {
2186            final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2187            if (lexicalScope.hasOwnProperty(name)) {
2188                return lexicalScope.findSetMethod(desc, request);
2189            }
2190        }
2191
2192        final GuardedInvocation invocation = super.findSetMethod(desc, request);
2193
2194        if (isScope && context.getEnv()._es6) {
2195            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2196        }
2197
2198        return invocation;
2199    }
2200
2201    /**
2202     * Adds jjs shell interactive mode builtin functions to global scope.
2203     */
2204    public void addShellBuiltins() {
2205        Object value = ScriptFunctionImpl.makeFunction("input", ShellFunctions.INPUT);
2206        addOwnProperty("input", Attribute.NOT_ENUMERABLE, value);
2207
2208        value = ScriptFunctionImpl.makeFunction("evalinput", ShellFunctions.EVALINPUT);
2209        addOwnProperty("evalinput", Attribute.NOT_ENUMERABLE, value);
2210    }
2211
2212    private synchronized SwitchPoint getLexicalScopeSwitchPoint() {
2213        SwitchPoint switchPoint = lexicalScopeSwitchPoint;
2214        if (switchPoint == null || switchPoint.hasBeenInvalidated()) {
2215            switchPoint = lexicalScopeSwitchPoint = new SwitchPoint();
2216        }
2217        return switchPoint;
2218    }
2219
2220    private synchronized void invalidateLexicalSwitchPoint() {
2221        if (lexicalScopeSwitchPoint != null) {
2222            context.getLogger(GlobalConstants.class).info("Invalidating non-constant globals on lexical scope update");
2223            SwitchPoint.invalidateAll(new SwitchPoint[]{ lexicalScopeSwitchPoint });
2224        }
2225    }
2226
2227
2228    @SuppressWarnings("unused")
2229    private static Object lexicalScopeFilter(final Object self) {
2230        if (self instanceof Global) {
2231            return ((Global) self).getLexicalScope();
2232        }
2233        return self;
2234    }
2235
2236    private <T extends ScriptObject> T initConstructorAndSwitchPoint(final String name, final Class<T> clazz) {
2237        final T func = initConstructor(name, clazz);
2238        tagBuiltinProperties(name, func);
2239        return func;
2240    }
2241
2242    private void init(final ScriptEngine eng) {
2243        assert Context.getGlobal() == this : "this global is not set as current";
2244
2245        final ScriptEnvironment env = getContext().getEnv();
2246
2247        // initialize Function and Object constructor
2248        initFunctionAndObject();
2249
2250        // Now fix Global's own proto.
2251        this.setInitialProto(getObjectPrototype());
2252
2253        // initialize global function properties
2254        this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
2255
2256        this.parseInt = ScriptFunctionImpl.makeFunction("parseInt",   GlobalFunctions.PARSEINT,
2257                    new Specialization[] {
2258                    new Specialization(GlobalFunctions.PARSEINT_Z),
2259                    new Specialization(GlobalFunctions.PARSEINT_I),
2260                    new Specialization(GlobalFunctions.PARSEINT_J),
2261                    new Specialization(GlobalFunctions.PARSEINT_OI),
2262                    new Specialization(GlobalFunctions.PARSEINT_O) });
2263        this.parseFloat = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2264        this.isNaN = ScriptFunctionImpl.makeFunction("isNaN",   GlobalFunctions.IS_NAN,
2265                   new Specialization[] {
2266                        new Specialization(GlobalFunctions.IS_NAN_I),
2267                        new Specialization(GlobalFunctions.IS_NAN_J),
2268                        new Specialization(GlobalFunctions.IS_NAN_D) });
2269        this.parseFloat         = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2270        this.isNaN              = ScriptFunctionImpl.makeFunction("isNaN",      GlobalFunctions.IS_NAN);
2271        this.isFinite           = ScriptFunctionImpl.makeFunction("isFinite",   GlobalFunctions.IS_FINITE);
2272        this.encodeURI          = ScriptFunctionImpl.makeFunction("encodeURI",  GlobalFunctions.ENCODE_URI);
2273        this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
2274        this.decodeURI          = ScriptFunctionImpl.makeFunction("decodeURI",  GlobalFunctions.DECODE_URI);
2275        this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
2276        this.escape             = ScriptFunctionImpl.makeFunction("escape",     GlobalFunctions.ESCAPE);
2277        this.unescape           = ScriptFunctionImpl.makeFunction("unescape",   GlobalFunctions.UNESCAPE);
2278        this.print              = ScriptFunctionImpl.makeFunction("print",      env._print_no_newline ? PRINT : PRINTLN);
2279        this.load               = ScriptFunctionImpl.makeFunction("load",       LOAD);
2280        this.loadWithNewGlobal  = ScriptFunctionImpl.makeFunction("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL);
2281        this.exit               = ScriptFunctionImpl.makeFunction("exit",       EXIT);
2282        this.quit               = ScriptFunctionImpl.makeFunction("quit",       EXIT);
2283
2284        // built-in constructors
2285        this.builtinArray     = initConstructorAndSwitchPoint("Array", ScriptFunction.class);
2286        this.builtinBoolean   = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class);
2287        this.builtinNumber    = initConstructorAndSwitchPoint("Number", ScriptFunction.class);
2288        this.builtinString    = initConstructorAndSwitchPoint("String", ScriptFunction.class);
2289        this.builtinMath      = initConstructorAndSwitchPoint("Math", ScriptObject.class);
2290
2291        // initialize String.prototype.length to 0
2292        // add String.prototype.length
2293        final ScriptObject stringPrototype = getStringPrototype();
2294        stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
2295
2296        // set isArray flag on Array.prototype
2297        final ScriptObject arrayPrototype = getArrayPrototype();
2298        arrayPrototype.setIsArray();
2299
2300        // Error stuff
2301        initErrorObjects();
2302
2303        // java access
2304        if (! env._no_java) {
2305            this.javaApi = LAZY_SENTINEL;
2306            this.javaImporter = LAZY_SENTINEL;
2307            initJavaAccess();
2308        }
2309
2310        if (! env._no_typed_arrays) {
2311            this.arrayBuffer       = LAZY_SENTINEL;
2312            this.dataView          = LAZY_SENTINEL;
2313            this.int8Array         = LAZY_SENTINEL;
2314            this.uint8Array        = LAZY_SENTINEL;
2315            this.uint8ClampedArray = LAZY_SENTINEL;
2316            this.int16Array        = LAZY_SENTINEL;
2317            this.uint16Array       = LAZY_SENTINEL;
2318            this.int32Array        = LAZY_SENTINEL;
2319            this.uint32Array       = LAZY_SENTINEL;
2320            this.float32Array      = LAZY_SENTINEL;
2321            this.float64Array      = LAZY_SENTINEL;
2322        }
2323
2324        if (env._scripting) {
2325            initScripting(env);
2326        }
2327
2328        if (Context.DEBUG) {
2329            boolean debugOkay;
2330            final SecurityManager sm = System.getSecurityManager();
2331            if (sm != null) {
2332                try {
2333                    sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
2334                    debugOkay = true;
2335                } catch (final SecurityException ignored) {
2336                    // if no permission, don't initialize Debug object
2337                    debugOkay = false;
2338                }
2339
2340            } else {
2341                debugOkay = true;
2342            }
2343
2344            if (debugOkay) {
2345                initDebug();
2346            }
2347        }
2348
2349        copyBuiltins();
2350
2351        // expose script (command line) arguments as "arguments" property of global
2352        arguments = wrapAsObject(env.getArguments().toArray());
2353        if (env._scripting) {
2354            // synonym for "arguments" in scripting mode
2355            addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
2356        }
2357
2358        if (eng != null) {
2359            // default file name
2360            addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
2361            // __noSuchProperty__ hook for ScriptContext search of missing variables
2362            final ScriptFunction noSuchProp = ScriptFunctionImpl.makeStrictFunction(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
2363            addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
2364        }
2365    }
2366
2367    private void initErrorObjects() {
2368        // Error objects
2369        this.builtinError = initConstructor("Error", ScriptFunction.class);
2370        final ScriptObject errorProto = getErrorPrototype();
2371
2372        // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
2373        final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
2374        final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
2375        errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
2376        final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
2377        final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
2378        errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
2379        final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
2380        final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
2381        errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
2382        final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
2383        final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
2384        errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
2385
2386        // ECMA 15.11.4.2 Error.prototype.name
2387        // Error.prototype.name = "Error";
2388        errorProto.set(NativeError.NAME, "Error", 0);
2389        // ECMA 15.11.4.3 Error.prototype.message
2390        // Error.prototype.message = "";
2391        errorProto.set(NativeError.MESSAGE, "", 0);
2392
2393        tagBuiltinProperties("Error", builtinError);
2394
2395        this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
2396        this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
2397        this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
2398    }
2399
2400    private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
2401        final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
2402        final ScriptObject prototype = ScriptFunction.getPrototype(cons);
2403        prototype.set(NativeError.NAME, name, 0);
2404        prototype.set(NativeError.MESSAGE, "", 0);
2405        prototype.setInitialProto(errorProto);
2406        tagBuiltinProperties(name, cons);
2407        return cons;
2408    }
2409
2410    private void initJavaAccess() {
2411        final ScriptObject objectProto = getObjectPrototype();
2412        this.builtinPackages = new NativeJavaPackage("", objectProto);
2413        this.builtinCom = new NativeJavaPackage("com", objectProto);
2414        this.builtinEdu = new NativeJavaPackage("edu", objectProto);
2415        this.builtinJava = new NativeJavaPackage("java", objectProto);
2416        this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
2417        this.builtinJavax = new NativeJavaPackage("javax", objectProto);
2418        this.builtinOrg = new NativeJavaPackage("org", objectProto);
2419    }
2420
2421    private void initScripting(final ScriptEnvironment scriptEnv) {
2422        ScriptObject value;
2423        value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
2424        addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
2425
2426        value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
2427        addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
2428
2429        final String execName = ScriptingFunctions.EXEC_NAME;
2430        value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
2431        value.addOwnProperty(ScriptingFunctions.THROW_ON_ERROR_NAME, Attribute.NOT_ENUMERABLE, false);
2432
2433        addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
2434
2435        // Nashorn extension: global.echo (scripting-mode-only)
2436        // alias for "print"
2437        value = (ScriptObject)get("print");
2438        addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
2439
2440        // Nashorn extension: global.$OPTIONS (scripting-mode-only)
2441        final ScriptObject options = newObject();
2442        copyOptions(options, scriptEnv);
2443        addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
2444
2445        // Nashorn extension: global.$ENV (scripting-mode-only)
2446        if (System.getSecurityManager() == null) {
2447            // do not fill $ENV if we have a security manager around
2448            // Retrieve current state of ENV variables.
2449            final ScriptObject env = newObject();
2450            env.putAll(System.getenv(), scriptEnv._strict);
2451
2452            // Some platforms, e.g., Windows, do not define the PWD environment
2453            // variable, so that the $ENV.PWD property needs to be explicitly
2454            // set.
2455            if (!env.containsKey(ScriptingFunctions.PWD_NAME)) {
2456                env.put(ScriptingFunctions.PWD_NAME, System.getProperty("user.dir"), scriptEnv._strict);
2457            }
2458
2459            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
2460        } else {
2461            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2462        }
2463
2464        // add other special properties for exec support
2465        addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2466        addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2467        addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2468    }
2469
2470    private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
2471        for (final Field f : scriptEnv.getClass().getFields()) {
2472            try {
2473                options.set(f.getName(), f.get(scriptEnv), 0);
2474            } catch (final IllegalArgumentException | IllegalAccessException exp) {
2475                throw new RuntimeException(exp);
2476            }
2477        }
2478    }
2479
2480    private void copyBuiltins() {
2481        this.array             = this.builtinArray;
2482        this._boolean          = this.builtinBoolean;
2483        this.error             = this.builtinError;
2484        this.function          = this.builtinFunction;
2485        this.com               = this.builtinCom;
2486        this.edu               = this.builtinEdu;
2487        this.java              = this.builtinJava;
2488        this.javafx            = this.builtinJavafx;
2489        this.javax             = this.builtinJavax;
2490        this.org               = this.builtinOrg;
2491        this.math              = this.builtinMath;
2492        this.number            = this.builtinNumber;
2493        this.object            = this.builtinObject;
2494        this.packages          = this.builtinPackages;
2495        this.referenceError    = this.builtinReferenceError;
2496        this.string            = this.builtinString;
2497        this.syntaxError       = this.builtinSyntaxError;
2498        this.typeError         = this.builtinTypeError;
2499    }
2500
2501    private void initDebug() {
2502        this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
2503    }
2504
2505    private Object printImpl(final boolean newLine, final Object... objects) {
2506        final ScriptContext sc = currentContext();
2507        @SuppressWarnings("resource")
2508        final PrintWriter out = sc != null? new PrintWriter(sc.getWriter()) : getContext().getEnv().getOut();
2509        final StringBuilder sb = new StringBuilder();
2510
2511        for (final Object obj : objects) {
2512            if (sb.length() != 0) {
2513                sb.append(' ');
2514            }
2515
2516            sb.append(JSType.toString(obj));
2517        }
2518
2519        // Print all at once to ensure thread friendly result.
2520        if (newLine) {
2521            out.println(sb.toString());
2522        } else {
2523            out.print(sb.toString());
2524        }
2525
2526        out.flush();
2527
2528        return UNDEFINED;
2529    }
2530
2531    private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
2532        try {
2533            // Assuming class name pattern for built-in JS constructors.
2534            final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
2535
2536            sb.append("Native");
2537            sb.append(name);
2538            sb.append("$Constructor");
2539
2540            final Class<?> funcClass = Class.forName(sb.toString());
2541            final T res = clazz.cast(funcClass.newInstance());
2542
2543            if (res instanceof ScriptFunction) {
2544                // All global constructor prototypes are not-writable,
2545                // not-enumerable and not-configurable.
2546                final ScriptFunction func = (ScriptFunction)res;
2547                func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
2548            }
2549
2550            if (res.getProto() == null) {
2551                res.setInitialProto(getObjectPrototype());
2552            }
2553
2554            res.setIsBuiltin();
2555
2556            return res;
2557        } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
2558            throw new RuntimeException(e);
2559        }
2560    }
2561
2562    private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) {
2563        final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>();
2564
2565        list.addAll(Arrays.asList(func.getMap().getProperties()));
2566
2567        if (func instanceof ScriptFunction) {
2568            final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func);
2569            if (proto != null) {
2570                list.addAll(Arrays.asList(proto.getMap().getProperties()));
2571            }
2572        }
2573
2574        final jdk.nashorn.internal.runtime.Property prop = getProperty(name);
2575        if (prop != null) {
2576            list.add(prop);
2577        }
2578
2579        return list;
2580    }
2581
2582    /**
2583     * Given a builtin object, traverse its properties recursively and associate them with a name that
2584     * will be a key to their invalidation switchpoint.
2585     * @param name name for key
2586     * @param func builtin script object
2587     */
2588    private void tagBuiltinProperties(final String name, final ScriptObject func) {
2589        SwitchPoint sp = context.getBuiltinSwitchPoint(name);
2590        if (sp == null) {
2591            sp = context.newBuiltinSwitchPoint(name);
2592        }
2593
2594        //get all builtin properties in this builtin object and register switchpoints keyed on the propery name,
2595        //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc
2596        for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) {
2597            prop.setBuiltinSwitchPoint(sp);
2598        }
2599    }
2600
2601    // Function and Object constructors are inter-dependent. Also,
2602    // Function.prototype
2603    // functions are not properly initialized. We fix the references here.
2604    // NOTE: be careful if you want to re-order the operations here. You may
2605    // have
2606    // to play with object references carefully!!
2607    private void initFunctionAndObject() {
2608        // First-n-foremost is Function
2609
2610        this.builtinFunction = initConstructor("Function", ScriptFunction.class);
2611
2612        // create global anonymous function
2613        final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
2614        // need to copy over members of Function.prototype to anon function
2615        anon.addBoundProperties(getFunctionPrototype());
2616
2617        // Function.prototype === Object.getPrototypeOf(Function) ===
2618        // <anon-function>
2619        builtinFunction.setInitialProto(anon);
2620        builtinFunction.setPrototype(anon);
2621        anon.set("constructor", builtinFunction, 0);
2622        anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
2623
2624        // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
2625        this.typeErrorThrower = new ScriptFunctionImpl("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER, null, null, 0);
2626        typeErrorThrower.setPrototype(UNDEFINED);
2627        // Non-constructor built-in functions do not have "prototype" property
2628        typeErrorThrower.deleteOwnProperty(typeErrorThrower.getMap().findProperty("prototype"));
2629        typeErrorThrower.preventExtensions();
2630
2631        // now initialize Object
2632        this.builtinObject = initConstructor("Object", ScriptFunction.class);
2633        final ScriptObject ObjectPrototype = getObjectPrototype();
2634        // Object.getPrototypeOf(Function.prototype) === Object.prototype
2635        anon.setInitialProto(ObjectPrototype);
2636
2637        // ES6 draft compliant __proto__ property of Object.prototype
2638        // accessors on Object.prototype for "__proto__"
2639        final ScriptFunction getProto = ScriptFunctionImpl.makeFunction("getProto", NativeObject.GET__PROTO__);
2640        final ScriptFunction setProto = ScriptFunctionImpl.makeFunction("setProto", NativeObject.SET__PROTO__);
2641        ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
2642
2643        // Function valued properties of Function.prototype were not properly
2644        // initialized. Because, these were created before global.function and
2645        // global.object were not initialized.
2646        jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
2647        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2648            final Object key = property.getKey();
2649            final Object value = builtinFunction.get(key);
2650
2651            if (value instanceof ScriptFunction && value != anon) {
2652                final ScriptFunction func = (ScriptFunction)value;
2653                func.setInitialProto(getFunctionPrototype());
2654                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2655                if (prototype != null) {
2656                    prototype.setInitialProto(ObjectPrototype);
2657                }
2658            }
2659        }
2660
2661        // For function valued properties of Object and Object.prototype, make
2662        // sure prototype's proto chain ends with Object.prototype
2663        for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
2664            final Object key = property.getKey();
2665            final Object value = builtinObject.get(key);
2666
2667            if (value instanceof ScriptFunction) {
2668                final ScriptFunction func = (ScriptFunction)value;
2669                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2670                if (prototype != null) {
2671                    prototype.setInitialProto(ObjectPrototype);
2672                }
2673            }
2674        }
2675
2676        properties = getObjectPrototype().getMap().getProperties();
2677
2678        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2679            final Object key   = property.getKey();
2680            if (key.equals("constructor")) {
2681                continue;
2682            }
2683
2684            final Object value = ObjectPrototype.get(key);
2685            if (value instanceof ScriptFunction) {
2686                final ScriptFunction func = (ScriptFunction)value;
2687                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2688                if (prototype != null) {
2689                    prototype.setInitialProto(ObjectPrototype);
2690                }
2691            }
2692        }
2693
2694        tagBuiltinProperties("Object", builtinObject);
2695        tagBuiltinProperties("Function", builtinFunction);
2696        tagBuiltinProperties("Function", anon);
2697    }
2698
2699    private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
2700        return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
2701    }
2702
2703    RegExpResult getLastRegExpResult() {
2704        return lastRegExpResult;
2705    }
2706
2707    void setLastRegExpResult(final RegExpResult regExpResult) {
2708        this.lastRegExpResult = regExpResult;
2709    }
2710
2711    @Override
2712    protected boolean isGlobal() {
2713        return true;
2714    }
2715
2716    /**
2717     * A class representing the ES6 global lexical scope.
2718     */
2719    private static class LexicalScope extends ScriptObject {
2720
2721        LexicalScope(final Global global) {
2722            super(global, PropertyMap.newMap());
2723        }
2724
2725        @Override
2726        protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2727            return filterInvocation(super.findGetMethod(desc, request, operator));
2728        }
2729
2730        @Override
2731        protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2732            return filterInvocation(super.findSetMethod(desc, request));
2733        }
2734
2735        @Override
2736        protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property, final boolean extensible) {
2737            // We override this method just to make it callable by Global
2738            return super.addBoundProperty(propMap, source, property, extensible);
2739        }
2740
2741        private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) {
2742            final MethodType type = invocation.getInvocation().type();
2743            return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER);
2744        }
2745    }
2746
2747}
2748