Global.java revision 1308:0eeaadd17fff 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.objects;
27
28import static jdk.nashorn.internal.lookup.Lookup.MH;
29import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
30import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
31import static jdk.nashorn.internal.runtime.JSType.isString;
32import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
33
34import java.io.IOException;
35import java.io.PrintWriter;
36import java.lang.invoke.MethodHandle;
37import java.lang.invoke.MethodHandles;
38import java.lang.invoke.MethodType;
39import java.lang.invoke.SwitchPoint;
40import java.lang.reflect.Field;
41import java.util.ArrayList;
42import java.util.Arrays;
43import java.util.List;
44import java.util.Map;
45import java.util.Objects;
46import java.util.concurrent.Callable;
47import java.util.concurrent.ConcurrentHashMap;
48import javax.script.ScriptContext;
49import javax.script.ScriptEngine;
50import jdk.internal.dynalink.CallSiteDescriptor;
51import jdk.internal.dynalink.linker.GuardedInvocation;
52import jdk.internal.dynalink.linker.LinkRequest;
53import jdk.nashorn.api.scripting.ClassFilter;
54import jdk.nashorn.api.scripting.ScriptObjectMirror;
55import jdk.nashorn.internal.lookup.Lookup;
56import jdk.nashorn.internal.objects.annotations.Attribute;
57import jdk.nashorn.internal.objects.annotations.Getter;
58import jdk.nashorn.internal.objects.annotations.Property;
59import jdk.nashorn.internal.objects.annotations.ScriptClass;
60import jdk.nashorn.internal.objects.annotations.Setter;
61import jdk.nashorn.internal.runtime.Context;
62import jdk.nashorn.internal.runtime.ECMAErrors;
63import jdk.nashorn.internal.runtime.FindProperty;
64import jdk.nashorn.internal.runtime.GlobalConstants;
65import jdk.nashorn.internal.runtime.GlobalFunctions;
66import jdk.nashorn.internal.runtime.JSType;
67import jdk.nashorn.internal.runtime.NativeJavaPackage;
68import jdk.nashorn.internal.runtime.PropertyDescriptor;
69import jdk.nashorn.internal.runtime.PropertyMap;
70import jdk.nashorn.internal.runtime.Scope;
71import jdk.nashorn.internal.runtime.ScriptEnvironment;
72import jdk.nashorn.internal.runtime.ScriptFunction;
73import jdk.nashorn.internal.runtime.ScriptObject;
74import jdk.nashorn.internal.runtime.ScriptRuntime;
75import jdk.nashorn.internal.runtime.ScriptingFunctions;
76import jdk.nashorn.internal.runtime.Specialization;
77import jdk.nashorn.internal.runtime.arrays.ArrayData;
78import jdk.nashorn.internal.runtime.linker.Bootstrap;
79import jdk.nashorn.internal.runtime.linker.InvokeByName;
80import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
81import jdk.nashorn.internal.runtime.regexp.RegExpResult;
82import jdk.nashorn.internal.scripts.JD;
83import jdk.nashorn.internal.scripts.JO;
84import jdk.nashorn.tools.ShellFunctions;
85
86/**
87 * Representation of global scope.
88 */
89@ScriptClass("Global")
90public final class Global extends ScriptObject implements Scope {
91    // Placeholder value used in place of a location property (__FILE__, __DIR__, __LINE__)
92    private static final Object LOCATION_PROPERTY_PLACEHOLDER = new Object();
93    private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
94    private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
95
96    // placeholder value for lazily initialized global objects
97    private static final Object LAZY_SENTINEL = new Object();
98
99    /**
100     * Optimistic builtin names that require switchpoint invalidation
101     * upon assignment. Overly conservative, but works for now, to avoid
102     * any complicated scope checks and especially heavy weight guards
103     * like
104     *
105     * <pre>
106     *     public boolean setterGuard(final Object receiver) {
107     *         final Global          global = Global.instance();
108     *         final ScriptObject    sobj   = global.getFunctionPrototype();
109     *         final Object          apply  = sobj.get("apply");
110     *         return apply == receiver;
111     *     }
112     * </pre>
113     *
114     * Naturally, checking for builtin classes like NativeFunction is cheaper,
115     * it's when you start adding property checks for said builtins you have
116     * problems with guard speed.
117     */
118
119    /** Nashorn extension: arguments array */
120    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
121    public Object arguments;
122
123    /** ECMA 15.1.2.2 parseInt (string , radix) */
124    @Property(attributes = Attribute.NOT_ENUMERABLE)
125    public Object parseInt;
126
127    /** ECMA 15.1.2.3 parseFloat (string) */
128    @Property(attributes = Attribute.NOT_ENUMERABLE)
129    public Object parseFloat;
130
131    /** ECMA 15.1.2.4 isNaN (number) */
132    @Property(attributes = Attribute.NOT_ENUMERABLE)
133    public Object isNaN;
134
135    /** ECMA 15.1.2.5 isFinite (number) */
136    @Property(attributes = Attribute.NOT_ENUMERABLE)
137    public Object isFinite;
138
139    /** ECMA 15.1.3.3 encodeURI */
140    @Property(attributes = Attribute.NOT_ENUMERABLE)
141    public Object encodeURI;
142
143    /** ECMA 15.1.3.4 encodeURIComponent */
144    @Property(attributes = Attribute.NOT_ENUMERABLE)
145    public Object encodeURIComponent;
146
147    /** ECMA 15.1.3.1 decodeURI */
148    @Property(attributes = Attribute.NOT_ENUMERABLE)
149    public Object decodeURI;
150
151    /** ECMA 15.1.3.2 decodeURIComponent */
152    @Property(attributes = Attribute.NOT_ENUMERABLE)
153    public Object decodeURIComponent;
154
155    /** ECMA B.2.1 escape (string) */
156    @Property(attributes = Attribute.NOT_ENUMERABLE)
157    public Object escape;
158
159    /** ECMA B.2.2 unescape (string) */
160    @Property(attributes = Attribute.NOT_ENUMERABLE)
161    public Object unescape;
162
163    /** Nashorn extension: global.print */
164    @Property(attributes = Attribute.NOT_ENUMERABLE)
165    public Object print;
166
167    /** Nashorn extension: global.load */
168    @Property(attributes = Attribute.NOT_ENUMERABLE)
169    public Object load;
170
171    /** Nashorn extension: global.loadWithNewGlobal */
172    @Property(attributes = Attribute.NOT_ENUMERABLE)
173    public Object loadWithNewGlobal;
174
175    /** Nashorn extension: global.exit */
176    @Property(attributes = Attribute.NOT_ENUMERABLE)
177    public Object exit;
178
179    /** Nashorn extension: global.quit */
180    @Property(attributes = Attribute.NOT_ENUMERABLE)
181    public Object quit;
182
183    /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
184    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
185    public final double NaN = Double.NaN;
186
187    /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
188    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
189    public final double Infinity = Double.POSITIVE_INFINITY;
190
191    /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
192    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
193    public final Object undefined = UNDEFINED;
194
195    /** ECMA 15.1.2.1 eval(x) */
196    @Property(attributes = Attribute.NOT_ENUMERABLE)
197    public Object eval;
198
199    /** ECMA 15.1.4.1 Object constructor. */
200    @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
201    public volatile Object object;
202
203    /** ECMA 15.1.4.2 Function constructor. */
204    @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
205    public volatile Object function;
206
207    /** ECMA 15.1.4.3 Array constructor. */
208    @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
209    public volatile Object array;
210
211    /** ECMA 15.1.4.4 String constructor */
212    @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
213    public volatile Object string;
214
215    /** ECMA 15.1.4.5 Boolean constructor */
216    @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
217    public volatile Object _boolean;
218
219    /** ECMA 15.1.4.6 - Number constructor */
220    @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
221    public volatile Object number;
222
223    /**
224     * Getter for ECMA 15.1.4.7 Date property
225     *
226     * @param self self reference
227     * @return Date property value
228     */
229    @Getter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
230    public static Object getDate(final Object self) {
231        final Global global = Global.instanceFrom(self);
232        if (global.date == LAZY_SENTINEL) {
233            global.date = global.getBuiltinDate();
234        }
235        return global.date;
236    }
237
238    /**
239     * Setter for ECMA 15.1.4.7 Date property
240     *
241     * @param self self reference
242     * @param value value for the Date property
243     */
244    @Setter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
245    public static void setDate(final Object self, final Object value) {
246        final Global global = Global.instanceFrom(self);
247        global.date = value;
248    }
249
250    private volatile Object date = LAZY_SENTINEL;
251
252    /**
253     * Getter for ECMA 15.1.4.8 RegExp property
254     *
255     * @param self self reference
256     * @return RegExp property value
257     */
258    @Getter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
259    public static Object getRegExp(final Object self) {
260        final Global global = Global.instanceFrom(self);
261        if (global.regexp == LAZY_SENTINEL) {
262            global.regexp = global.getBuiltinRegExp();
263        }
264        return global.regexp;
265    }
266
267    /**
268     * Setter for ECMA 15.1.4.8 RegExp property
269     *
270     * @param self self reference
271     * @param value value for the RegExp property
272     */
273    @Setter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
274    public static void setRegExp(final Object self, final Object value) {
275        final Global global = Global.instanceFrom(self);
276        global.regexp = value;
277    }
278
279    private volatile Object regexp = LAZY_SENTINEL;
280
281    /**
282     * Getter for ECMA 15.12 - The JSON property
283     * @param self self reference
284     * @return the value of JSON property
285     */
286    @Getter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
287    public static Object getJSON(final Object self) {
288        final Global global = Global.instanceFrom(self);
289        if (global.json == LAZY_SENTINEL) {
290            global.json = global.getBuiltinJSON();
291        }
292        return global.json;
293    }
294
295    /**
296     * Setter for ECMA 15.12 - The JSON property
297     * @param self self reference
298     * @param value value for the JSON property
299     */
300    @Setter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
301    public static void setJSON(final Object self, final Object value) {
302        final Global global = Global.instanceFrom(self);
303        global.json = value;
304    }
305
306    private volatile Object json = LAZY_SENTINEL;
307
308    /**
309     * Getter for Nashorn extension: global.JSAdapter
310     * @param self self reference
311     * @return value of the JSAdapter property
312     */
313    @Getter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
314    public static Object getJSAdapter(final Object self) {
315        final Global global = Global.instanceFrom(self);
316        if (global.jsadapter == LAZY_SENTINEL) {
317            global.jsadapter = global.getBuiltinJSAdapter();
318        }
319        return global.jsadapter;
320    }
321
322    /**
323     * Setter for Nashorn extension: global.JSAdapter
324     * @param self self reference
325     * @param value value for the JSAdapter property
326     */
327    @Setter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
328    public static void setJSAdapter(final Object self, final Object value) {
329        final Global global = Global.instanceFrom(self);
330        global.jsadapter = value;
331    }
332
333    private volatile Object jsadapter = LAZY_SENTINEL;
334
335    /** ECMA 15.8 - The Math object */
336    @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
337    public volatile Object math;
338
339    /** Error object */
340    @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
341    public volatile Object error;
342
343    /**
344     * Getter for the EvalError property
345     * @param self self reference
346     * @return the value of EvalError property
347     */
348    @Getter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
349    public static Object getEvalError(final Object self) {
350        final Global global = Global.instanceFrom(self);
351        if (global.evalError == LAZY_SENTINEL) {
352            global.evalError = global.getBuiltinEvalError();
353        }
354        return global.evalError;
355    }
356
357    /**
358     * Setter for the EvalError property
359     * @param self self reference
360     * @param value value of the EvalError property
361     */
362    @Setter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
363    public static void setEvalError(final Object self, final Object value) {
364        final Global global = Global.instanceFrom(self);
365        global.evalError = value;
366    }
367
368    private volatile Object evalError = LAZY_SENTINEL;
369
370    /**
371     * Getter for the RangeError property.
372     * @param self self reference
373     * @return the value of RangeError property
374     */
375    @Getter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
376    public static Object getRangeError(final Object self) {
377        final Global global = Global.instanceFrom(self);
378        if (global.rangeError == LAZY_SENTINEL) {
379            global.rangeError = global.getBuiltinRangeError();
380        }
381        return global.rangeError;
382    }
383
384
385    /**
386     * Setter for the RangeError property.
387     * @param self self reference
388     * @param value value for the RangeError property
389     */
390    @Setter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
391    public static void setRangeError(final Object self, final Object value) {
392        final Global global = Global.instanceFrom(self);
393        global.rangeError = value;
394    }
395
396    private volatile Object rangeError = LAZY_SENTINEL;
397
398    /** ReferenceError object */
399    @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
400    public volatile Object referenceError;
401
402    /** SyntaxError object */
403    @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
404    public volatile Object syntaxError;
405
406    /** TypeError object */
407    @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
408    public volatile Object typeError;
409
410    /**
411     * Getter for the URIError property.
412     * @param self self reference
413     * @return the value of URIError property
414     */
415    @Getter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
416    public static Object getURIError(final Object self) {
417        final Global global = Global.instanceFrom(self);
418        if (global.uriError == LAZY_SENTINEL) {
419            global.uriError = global.getBuiltinURIError();
420        }
421        return global.uriError;
422    }
423
424    /**
425     * Setter for the URIError property.
426     * @param self self reference
427     * @param value value for the URIError property
428     */
429    @Setter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
430    public static void setURIError(final Object self, final Object value) {
431        final Global global = Global.instanceFrom(self);
432        global.uriError = value;
433    }
434
435    private volatile Object uriError = LAZY_SENTINEL;
436
437    /**
438     * Getter for the ArrayBuffer property.
439     * @param self self reference
440     * @return the value of the ArrayBuffer property
441     */
442    @Getter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
443    public static Object getArrayBuffer(final Object self) {
444        final Global global = Global.instanceFrom(self);
445        if (global.arrayBuffer == LAZY_SENTINEL) {
446            global.arrayBuffer = global.getBuiltinArrayBuffer();
447        }
448        return global.arrayBuffer;
449    }
450
451    /**
452     * Setter for the ArrayBuffer property.
453     * @param self self reference
454     * @param value value of the ArrayBuffer property
455     */
456    @Setter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
457    public static void setArrayBuffer(final Object self, final Object value) {
458        final Global global = Global.instanceFrom(self);
459        global.arrayBuffer = value;
460    }
461
462    private volatile Object arrayBuffer;
463
464    /**
465     * Getter for the DataView property.
466     * @param self self reference
467     * @return the value of the DataView property
468     */
469    @Getter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
470    public static Object getDataView(final Object self) {
471        final Global global = Global.instanceFrom(self);
472        if (global.dataView == LAZY_SENTINEL) {
473            global.dataView = global.getBuiltinDataView();
474        }
475        return global.dataView;
476    }
477
478
479    /**
480     * Setter for the DataView property.
481     * @param self self reference
482     * @param value value of the DataView property
483     */
484    @Setter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
485    public static void setDataView(final Object self, final Object value) {
486        final Global global = Global.instanceFrom(self);
487        global.dataView = value;
488    }
489
490    private volatile Object dataView;
491
492    /**
493     * Getter for the Int8Array property.
494     * @param self self reference
495     * @return the value of the Int8Array property.
496     */
497    @Getter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
498    public static Object getInt8Array(final Object self) {
499        final Global global = Global.instanceFrom(self);
500        if (global.int8Array == LAZY_SENTINEL) {
501            global.int8Array = global.getBuiltinInt8Array();
502        }
503        return global.int8Array;
504    }
505
506    /**
507     * Setter for the Int8Array property.
508     * @param self self reference
509     * @param value value of the Int8Array property
510     */
511    @Setter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
512    public static void setInt8Array(final Object self, final Object value) {
513        final Global global = Global.instanceFrom(self);
514        global.int8Array = value;
515    }
516
517    private volatile Object int8Array;
518
519    /**
520     * Getter for the Uin8Array property.
521     * @param self self reference
522     * @return the value of the Uint8Array property
523     */
524    @Getter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
525    public static Object getUint8Array(final Object self) {
526        final Global global = Global.instanceFrom(self);
527        if (global.uint8Array == LAZY_SENTINEL) {
528            global.uint8Array = global.getBuiltinUint8Array();
529        }
530        return global.uint8Array;
531    }
532
533    /**
534     * Setter for the Uin8Array property.
535     * @param self self reference
536     * @param value value of the Uin8Array property
537     */
538    @Setter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
539    public static void setUint8Array(final Object self, final Object value) {
540        final Global global = Global.instanceFrom(self);
541        global.uint8Array = value;
542    }
543
544    private volatile Object uint8Array;
545
546    /**
547     * Getter for the Uint8ClampedArray property.
548     * @param self self reference
549     * @return the value of the Uint8ClampedArray property
550     */
551    @Getter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
552    public static Object getUint8ClampedArray(final Object self) {
553        final Global global = Global.instanceFrom(self);
554        if (global.uint8ClampedArray == LAZY_SENTINEL) {
555            global.uint8ClampedArray = global.getBuiltinUint8ClampedArray();
556        }
557        return global.uint8ClampedArray;
558    }
559
560    /**
561     * Setter for the Uint8ClampedArray property.
562     * @param self self reference
563     * @param value value of the Uint8ClampedArray property
564     */
565    @Setter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
566    public static void setUint8ClampedArray(final Object self, final Object value) {
567        final Global global = Global.instanceFrom(self);
568        global.uint8ClampedArray = value;
569    }
570
571    private volatile Object uint8ClampedArray;
572
573    /**
574     * Getter for the Int16Array property.
575     * @param self self reference
576     * @return the value of the Int16Array property
577     */
578    @Getter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
579    public static Object getInt16Array(final Object self) {
580        final Global global = Global.instanceFrom(self);
581        if (global.int16Array == LAZY_SENTINEL) {
582            global.int16Array = global.getBuiltinInt16Array();
583        }
584        return global.int16Array;
585    }
586
587    /**
588     * Setter for the Int16Array property.
589     * @param self self reference
590     * @param value value of the Int16Array property
591     */
592    @Setter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
593    public static void setInt16Array(final Object self, final Object value) {
594        final Global global = Global.instanceFrom(self);
595        global.int16Array = value;
596    }
597
598    private volatile Object int16Array;
599
600    /**
601     * Getter for the Uint16Array property.
602     * @param self self reference
603     * @return the value of the Uint16Array property
604     */
605    @Getter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
606    public static Object getUint16Array(final Object self) {
607        final Global global = Global.instanceFrom(self);
608        if (global.uint16Array == LAZY_SENTINEL) {
609            global.uint16Array = global.getBuiltinUint16Array();
610        }
611        return global.uint16Array;
612    }
613
614    /**
615     * Setter for the Uint16Array property.
616     * @param self self reference
617     * @param value value of the Uint16Array property
618     */
619    @Setter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
620    public static void setUint16Array(final Object self, final Object value) {
621        final Global global = Global.instanceFrom(self);
622        global.uint16Array = value;
623    }
624
625    private volatile Object uint16Array;
626
627    /**
628     * Getter for the Int32Array property.
629     *
630     * @param self self reference
631     * @return the value of the Int32Array property
632     */
633    @Getter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
634    public static Object getInt32Array(final Object self) {
635        final Global global = Global.instanceFrom(self);
636        if (global.int32Array == LAZY_SENTINEL) {
637            global.int32Array = global.getBuiltinInt32Array();
638        }
639        return global.int32Array;
640    }
641
642
643    /**
644     * Setter for the Int32Array property.
645     *
646     * @param self self reference
647     * @param value value of the Int32Array property
648     */
649    @Setter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
650    public static void setInt32Array(final Object self, final Object value) {
651        final Global global = Global.instanceFrom(self);
652        global.int32Array = value;
653    }
654
655    private volatile Object int32Array;
656
657    /**
658     * Getter of the Uint32Array property.
659     *
660     * @param self self reference
661     * @return the value of the Uint32Array property
662     */
663    @Getter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
664    public static Object getUint32Array(final Object self) {
665        final Global global = Global.instanceFrom(self);
666        if (global.uint32Array == LAZY_SENTINEL) {
667            global.uint32Array = global.getBuiltinUint32Array();
668        }
669        return global.uint32Array;
670    }
671
672
673    /**
674     * Setter of the Uint32Array property.
675     *
676     * @param self self reference
677     * @param value value of the Uint32Array property
678     */
679    @Setter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
680    public static void setUint32Array(final Object self, final Object value) {
681        final Global global = Global.instanceFrom(self);
682        global.uint32Array = value;
683    }
684
685    private volatile Object uint32Array;
686
687    /**
688     * Getter for the Float32Array property.
689     *
690     * @param self self reference
691     * @return the value of the Float32Array property
692     */
693    @Getter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
694    public static Object getFloat32Array(final Object self) {
695        final Global global = Global.instanceFrom(self);
696        if (global.float32Array == LAZY_SENTINEL) {
697            global.float32Array = global.getBuiltinFloat32Array();
698        }
699        return global.float32Array;
700    }
701
702    /**
703     * Setter for the Float32Array property.
704     *
705     * @param self self reference
706     * @param value value of the Float32Array property
707     */
708    @Setter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
709    public static void setFloat32Array(final Object self, final Object value) {
710        final Global global = Global.instanceFrom(self);
711        global.float32Array = value;
712    }
713
714    private volatile Object float32Array;
715
716    /**
717     * Getter for the Float64Array property.
718     *
719     * @param self self reference
720     * @return the value of the Float64Array property
721     */
722    @Getter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
723    public static Object getFloat64Array(final Object self) {
724        final Global global = Global.instanceFrom(self);
725        if (global.float64Array == LAZY_SENTINEL) {
726            global.float64Array = global.getBuiltinFloat64Array();
727        }
728        return global.float64Array;
729    }
730
731    /**
732     * Setter for the Float64Array property.
733     *
734     * @param self self reference
735     * @param value value of the Float64Array property
736     */
737    @Setter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
738    public static void setFloat64Array(final Object self, final Object value) {
739        final Global global = Global.instanceFrom(self);
740        global.float64Array = value;
741    }
742
743    private volatile Object float64Array;
744
745    /** Nashorn extension: Java access - global.Packages */
746    @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
747    public volatile Object packages;
748
749    /** Nashorn extension: Java access - global.com */
750    @Property(attributes = Attribute.NOT_ENUMERABLE)
751    public volatile Object com;
752
753    /** Nashorn extension: Java access - global.edu */
754    @Property(attributes = Attribute.NOT_ENUMERABLE)
755    public volatile Object edu;
756
757    /** Nashorn extension: Java access - global.java */
758    @Property(attributes = Attribute.NOT_ENUMERABLE)
759    public volatile Object java;
760
761    /** Nashorn extension: Java access - global.javafx */
762    @Property(attributes = Attribute.NOT_ENUMERABLE)
763    public volatile Object javafx;
764
765    /** Nashorn extension: Java access - global.javax */
766    @Property(attributes = Attribute.NOT_ENUMERABLE)
767    public volatile Object javax;
768
769    /** Nashorn extension: Java access - global.org */
770    @Property(attributes = Attribute.NOT_ENUMERABLE)
771    public volatile Object org;
772
773    /**
774     * Getter for the Nashorn extension: Java access - global.javaImporter.
775     *
776     * @param self self reference
777     * @return the value of the JavaImporter property
778     */
779    @Getter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
780    public static Object getJavaImporter(final Object self) {
781        final Global global = Global.instanceFrom(self);
782        if (global.javaImporter == LAZY_SENTINEL) {
783            global.javaImporter = global.getBuiltinJavaImporter();
784        }
785        return global.javaImporter;
786    }
787
788    /**
789     * Setter for the Nashorn extension: Java access - global.javaImporter.
790     *
791     * @param self self reference
792     * @param value value of the JavaImporter property
793     */
794    @Setter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
795    public static void setJavaImporter(final Object self, final Object value) {
796        final Global global = Global.instanceFrom(self);
797        global.javaImporter = value;
798    }
799
800    private volatile Object javaImporter;
801
802    /**
803     * Getter for the Nashorn extension: global.Java property.
804     *
805     * @param self self reference
806     * @return the value of the Java property
807     */
808    @Getter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
809    public static Object getJavaApi(final Object self) {
810        final Global global = Global.instanceFrom(self);
811        if (global.javaApi == LAZY_SENTINEL) {
812            global.javaApi = global.getBuiltinJavaApi();
813        }
814        return global.javaApi;
815    }
816
817    /**
818     * Setter for the Nashorn extension: global.Java property.
819     *
820     * @param self self reference
821     * @param value value of the Java property
822     */
823    @Setter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
824    public static void setJavaApi(final Object self, final Object value) {
825        final Global global = Global.instanceFrom(self);
826        global.javaApi = value;
827    }
828
829    private volatile Object javaApi;
830
831    /** Nashorn extension: current script's file name */
832    @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
833    public final Object __FILE__ = LOCATION_PROPERTY_PLACEHOLDER;
834
835    /** Nashorn extension: current script's directory */
836    @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
837    public final Object __DIR__ = LOCATION_PROPERTY_PLACEHOLDER;
838
839    /** Nashorn extension: current source line number being executed */
840    @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
841    public final Object __LINE__ = LOCATION_PROPERTY_PLACEHOLDER;
842
843    private volatile NativeDate DEFAULT_DATE;
844
845    /** Used as Date.prototype's default value */
846    NativeDate getDefaultDate() {
847        return DEFAULT_DATE;
848    }
849
850    private volatile NativeRegExp DEFAULT_REGEXP;
851
852    /** Used as RegExp.prototype's default value */
853    NativeRegExp getDefaultRegExp() {
854        return DEFAULT_REGEXP;
855    }
856
857    /*
858     * Built-in constructor objects: Even if user changes dynamic values of
859     * "Object", "Array" etc., we still want to keep original values of these
860     * constructors here. For example, we need to be able to create array,
861     * regexp literals even after user overwrites global "Array" or "RegExp"
862     * constructor - see also ECMA 262 spec. Annex D.
863     */
864    private ScriptFunction builtinFunction;
865    private ScriptFunction builtinObject;
866    private ScriptFunction builtinArray;
867    private ScriptFunction builtinBoolean;
868    private ScriptFunction builtinDate;
869    private ScriptObject   builtinJSON;
870    private ScriptFunction builtinJSAdapter;
871    private ScriptObject   builtinMath;
872    private ScriptFunction builtinNumber;
873    private ScriptFunction builtinRegExp;
874    private ScriptFunction builtinString;
875    private ScriptFunction builtinError;
876    private ScriptFunction builtinEval;
877    private ScriptFunction builtinEvalError;
878    private ScriptFunction builtinRangeError;
879    private ScriptFunction builtinReferenceError;
880    private ScriptFunction builtinSyntaxError;
881    private ScriptFunction builtinTypeError;
882    private ScriptFunction builtinURIError;
883    private ScriptObject   builtinPackages;
884    private ScriptObject   builtinCom;
885    private ScriptObject   builtinEdu;
886    private ScriptObject   builtinJava;
887    private ScriptObject   builtinJavafx;
888    private ScriptObject   builtinJavax;
889    private ScriptObject   builtinOrg;
890    private ScriptFunction builtinJavaImporter;
891    private ScriptObject   builtinJavaApi;
892    private ScriptFunction builtinArrayBuffer;
893    private ScriptFunction builtinDataView;
894    private ScriptFunction builtinInt8Array;
895    private ScriptFunction builtinUint8Array;
896    private ScriptFunction builtinUint8ClampedArray;
897    private ScriptFunction builtinInt16Array;
898    private ScriptFunction builtinUint16Array;
899    private ScriptFunction builtinInt32Array;
900    private ScriptFunction builtinUint32Array;
901    private ScriptFunction builtinFloat32Array;
902    private ScriptFunction builtinFloat64Array;
903
904    /*
905     * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
906     */
907    private ScriptFunction typeErrorThrower;
908
909    // Flag to indicate that a split method issued a return statement
910    private int splitState = -1;
911
912    // Used to store the last RegExp result to support deprecated RegExp constructor properties
913    private RegExpResult lastRegExpResult;
914
915    private static final MethodHandle EVAL                 = findOwnMH_S("eval",                Object.class, Object.class, Object.class);
916    private static final MethodHandle NO_SUCH_PROPERTY     = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
917    private static final MethodHandle PRINT                = findOwnMH_S("print",               Object.class, Object.class, Object[].class);
918    private static final MethodHandle PRINTLN              = findOwnMH_S("println",             Object.class, Object.class, Object[].class);
919    private static final MethodHandle LOAD                 = findOwnMH_S("load",                Object.class, Object.class, Object.class);
920    private static final MethodHandle LOAD_WITH_NEW_GLOBAL = findOwnMH_S("loadWithNewGlobal",   Object.class, Object.class, Object[].class);
921    private static final MethodHandle EXIT                 = findOwnMH_S("exit",                Object.class, Object.class, Object.class);
922    private static final MethodHandle LEXICAL_SCOPE_FILTER = findOwnMH_S("lexicalScopeFilter",  Object.class, Object.class);
923
924    // initialized by nasgen
925    private static PropertyMap $nasgenmap$;
926
927    // context to which this global belongs to
928    private final Context context;
929
930    // current ScriptContext to use - can be null.
931    private ThreadLocal<ScriptContext> scontext;
932    // current ScriptEngine associated - can be null.
933    private ScriptEngine engine;
934    // initial ScriptContext - can be null
935    private volatile ScriptContext initscontext;
936
937    // ES6 global lexical scope.
938    private final LexicalScope lexicalScope;
939
940    // Switchpoint for non-constant global callsites in the presence of ES6 lexical scope.
941    private SwitchPoint lexicalScopeSwitchPoint;
942
943    /**
944     * Set the current script context
945     * @param ctxt script context
946     */
947    public void setScriptContext(final ScriptContext ctxt) {
948        assert scontext != null;
949        scontext.set(ctxt);
950    }
951
952    /**
953     * Get the current script context
954     * @return current script context
955     */
956    public ScriptContext getScriptContext() {
957        assert scontext != null;
958        return scontext.get();
959    }
960
961    private ScriptContext currentContext() {
962        final ScriptContext sc = scontext != null? scontext.get() : null;
963        return sc == null? initscontext : sc;
964    }
965
966    @Override
967    protected Context getContext() {
968        return context;
969    }
970
971    @Override
972    protected boolean useDualFields() {
973        return context.useDualFields();
974    }
975
976    // performs initialization checks for Global constructor and returns the
977    // PropertyMap, if everything is fine.
978    private static PropertyMap checkAndGetMap(final Context context) {
979        // security check first
980        final SecurityManager sm = System.getSecurityManager();
981        if (sm != null) {
982            sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
983        }
984
985        Objects.requireNonNull(context);
986
987        return $nasgenmap$;
988    }
989
990    /**
991     * Constructor
992     *
993     * @param context the context
994     */
995    public Global(final Context context) {
996        super(checkAndGetMap(context));
997        this.context = context;
998        this.setIsScope();
999        this.lexicalScope = context.getEnv()._es6 ? new LexicalScope(this) : null;
1000    }
1001
1002    /**
1003     * Script access to "current" Global instance
1004     *
1005     * @return the global singleton
1006     */
1007    public static Global instance() {
1008        final Global global = Context.getGlobal();
1009        Objects.requireNonNull(global);
1010        return global;
1011    }
1012
1013    private static Global instanceFrom(final Object self) {
1014        return self instanceof Global? (Global)self : instance();
1015    }
1016
1017    /**
1018     * Check if we have a Global instance
1019     * @return true if one exists
1020     */
1021    public static boolean hasInstance() {
1022        return Context.getGlobal() != null;
1023    }
1024
1025    /**
1026     * Script access to {@link ScriptEnvironment}
1027     *
1028     * @return the script environment
1029     */
1030    static ScriptEnvironment getEnv() {
1031        return instance().getContext().getEnv();
1032    }
1033
1034    /**
1035     * Script access to {@link Context}
1036     *
1037     * @return the context
1038     */
1039    static Context getThisContext() {
1040        return instance().getContext();
1041    }
1042
1043    // Runtime interface to Global
1044
1045    /**
1046     * Is there a class filter in the current Context?
1047     * @return class filter
1048     */
1049    public ClassFilter getClassFilter() {
1050        return context.getClassFilter();
1051    }
1052
1053    /**
1054     * Is this global of the given Context?
1055     * @param ctxt the context
1056     * @return true if this global belongs to the given Context
1057     */
1058    public boolean isOfContext(final Context ctxt) {
1059        return this.context == ctxt;
1060    }
1061
1062    /**
1063     * Does this global belong to a strict Context?
1064     * @return true if this global belongs to a strict Context
1065     */
1066    public boolean isStrictContext() {
1067        return context.getEnv()._strict;
1068    }
1069
1070    /**
1071     * Initialize standard builtin objects like "Object", "Array", "Function" etc.
1072     * as well as our extension builtin objects like "Java", "JSAdapter" as properties
1073     * of the global scope object.
1074     *
1075     * @param eng ScriptEngine to initialize
1076     * @param ctxt ScriptContext to initialize
1077     */
1078    public void initBuiltinObjects(final ScriptEngine eng, final ScriptContext ctxt) {
1079        if (this.builtinObject != null) {
1080            // already initialized, just return
1081            return;
1082        }
1083
1084        this.engine = eng;
1085        this.initscontext = ctxt;
1086        if (this.engine != null) {
1087            this.scontext = new ThreadLocal<>();
1088        }
1089        init(eng);
1090    }
1091
1092    /**
1093     * Wrap a Java object as corresponding script object
1094     *
1095     * @param obj object to wrap
1096     * @return    wrapped object
1097     */
1098    public Object wrapAsObject(final Object obj) {
1099        if (obj instanceof Boolean) {
1100            return new NativeBoolean((Boolean)obj, this);
1101        } else if (obj instanceof Number) {
1102            return new NativeNumber(((Number)obj).doubleValue(), this);
1103        } else if (isString(obj)) {
1104            return new NativeString((CharSequence)obj, this);
1105        } else if (obj instanceof Object[]) { // extension
1106            return new NativeArray(ArrayData.allocate((Object[])obj), this);
1107        } else if (obj instanceof double[]) { // extension
1108            return new NativeArray(ArrayData.allocate((double[])obj), this);
1109        } else if (obj instanceof long[]) {
1110            return new NativeArray(ArrayData.allocate((long[])obj), this);
1111        } else if (obj instanceof int[]) {
1112            return new NativeArray(ArrayData.allocate((int[]) obj), this);
1113        } else if (obj instanceof ArrayData) {
1114            return new NativeArray((ArrayData) obj, this);
1115        } else {
1116            // FIXME: more special cases? Map? List?
1117            return obj;
1118        }
1119    }
1120
1121    /**
1122     * Lookup helper for JS primitive types
1123     *
1124     * @param request the link request for the dynamic call site.
1125     * @param self     self reference
1126     *
1127     * @return guarded invocation
1128     */
1129    public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
1130        if (isString(self)) {
1131            return NativeString.lookupPrimitive(request, self);
1132        } else if (self instanceof Number) {
1133            return NativeNumber.lookupPrimitive(request, self);
1134        } else if (self instanceof Boolean) {
1135            return NativeBoolean.lookupPrimitive(request, self);
1136        }
1137        throw new IllegalArgumentException("Unsupported primitive: " + self);
1138    }
1139
1140    /**
1141     * Returns a method handle that creates a wrapper object for a JS primitive value.
1142     *
1143     * @param self receiver object
1144     * @return method handle to create wrapper objects for primitive receiver
1145     */
1146    public static MethodHandle getPrimitiveWrapFilter(final Object self) {
1147        if (isString(self)) {
1148            return NativeString.WRAPFILTER;
1149        } else if (self instanceof Number) {
1150            return NativeNumber.WRAPFILTER;
1151        } else if (self instanceof Boolean) {
1152            return NativeBoolean.WRAPFILTER;
1153        }
1154        throw new IllegalArgumentException("Unsupported primitive: " + self);
1155    }
1156
1157
1158    /**
1159     * Create a new empty script object
1160     *
1161     * @return the new ScriptObject
1162     */
1163    public ScriptObject newObject() {
1164        return useDualFields() ? new JD(getObjectPrototype()) : new JO(getObjectPrototype());
1165    }
1166
1167    /**
1168     * Default value of given type
1169     *
1170     * @param sobj     script object
1171     * @param typeHint type hint
1172     *
1173     * @return default value
1174     */
1175    public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
1176        // When the [[DefaultValue]] internal method of O is called with no hint,
1177        // then it behaves as if the hint were Number, unless O is a Date object
1178        // in which case it behaves as if the hint were String.
1179        Class<?> hint = typeHint;
1180        if (hint == null) {
1181            hint = Number.class;
1182        }
1183
1184        try {
1185            if (hint == String.class) {
1186
1187                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1188
1189                if (Bootstrap.isCallable(toString)) {
1190                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1191                    if (JSType.isPrimitive(value)) {
1192                        return value;
1193                    }
1194                }
1195
1196                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1197                if (Bootstrap.isCallable(valueOf)) {
1198                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1199                    if (JSType.isPrimitive(value)) {
1200                        return value;
1201                    }
1202                }
1203                throw typeError(this, "cannot.get.default.string");
1204            }
1205
1206            if (hint == Number.class) {
1207                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1208                if (Bootstrap.isCallable(valueOf)) {
1209                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1210                    if (JSType.isPrimitive(value)) {
1211                        return value;
1212                    }
1213                }
1214
1215                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1216                if (Bootstrap.isCallable(toString)) {
1217                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1218                    if (JSType.isPrimitive(value)) {
1219                        return value;
1220                    }
1221                }
1222
1223                throw typeError(this, "cannot.get.default.number");
1224            }
1225        } catch (final RuntimeException | Error e) {
1226            throw e;
1227        } catch (final Throwable t) {
1228            throw new RuntimeException(t);
1229        }
1230
1231        return UNDEFINED;
1232    }
1233
1234    /**
1235     * Is the given ScriptObject an ECMAScript Error object?
1236     *
1237     * @param sobj the object being checked
1238     * @return true if sobj is an Error object
1239     */
1240    public boolean isError(final ScriptObject sobj) {
1241        final ScriptObject errorProto = getErrorPrototype();
1242        ScriptObject proto = sobj.getProto();
1243        while (proto != null) {
1244            if (proto == errorProto) {
1245                return true;
1246            }
1247            proto = proto.getProto();
1248        }
1249        return false;
1250    }
1251
1252    /**
1253     * Create a new ECMAScript Error object.
1254     *
1255     * @param msg error message
1256     * @return newly created Error object
1257     */
1258    public ScriptObject newError(final String msg) {
1259        return new NativeError(msg, this);
1260    }
1261
1262    /**
1263     * Create a new ECMAScript EvalError object.
1264     *
1265     * @param msg error message
1266     * @return newly created EvalError object
1267     */
1268    public ScriptObject newEvalError(final String msg) {
1269        return new NativeEvalError(msg, this);
1270    }
1271
1272    /**
1273     * Create a new ECMAScript RangeError object.
1274     *
1275     * @param msg error message
1276     * @return newly created RangeError object
1277     */
1278    public ScriptObject newRangeError(final String msg) {
1279        return new NativeRangeError(msg, this);
1280    }
1281
1282    /**
1283     * Create a new ECMAScript ReferenceError object.
1284     *
1285     * @param msg error message
1286     * @return newly created ReferenceError object
1287     */
1288    public ScriptObject newReferenceError(final String msg) {
1289        return new NativeReferenceError(msg, this);
1290    }
1291
1292    /**
1293     * Create a new ECMAScript SyntaxError object.
1294     *
1295     * @param msg error message
1296     * @return newly created SyntaxError object
1297     */
1298    public ScriptObject newSyntaxError(final String msg) {
1299        return new NativeSyntaxError(msg, this);
1300    }
1301
1302    /**
1303     * Create a new ECMAScript TypeError object.
1304     *
1305     * @param msg error message
1306     * @return newly created TypeError object
1307     */
1308    public ScriptObject newTypeError(final String msg) {
1309        return new NativeTypeError(msg, this);
1310    }
1311
1312    /**
1313     * Create a new ECMAScript URIError object.
1314     *
1315     * @param msg error message
1316     * @return newly created URIError object
1317     */
1318    public ScriptObject newURIError(final String msg) {
1319        return new NativeURIError(msg, this);
1320    }
1321
1322    /**
1323     * Create a new ECMAScript GenericDescriptor object.
1324     *
1325     * @param configurable is the property configurable?
1326     * @param enumerable is the property enumerable?
1327     * @return newly created GenericDescriptor object
1328     */
1329    public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
1330        return new GenericPropertyDescriptor(configurable, enumerable, this);
1331    }
1332
1333    /**
1334     * Create a new ECMAScript DatePropertyDescriptor object.
1335     *
1336     * @param value of the data property
1337     * @param configurable is the property configurable?
1338     * @param enumerable is the property enumerable?
1339     * @param writable is the property writable?
1340     * @return newly created DataPropertyDescriptor object
1341     */
1342    public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
1343        return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
1344    }
1345
1346    /**
1347     * Create a new ECMAScript AccessorPropertyDescriptor object.
1348     *
1349     * @param get getter function of the user accessor property
1350     * @param set setter function of the user accessor property
1351     * @param configurable is the property configurable?
1352     * @param enumerable is the property enumerable?
1353     * @return newly created AccessorPropertyDescriptor object
1354     */
1355    public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
1356        final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
1357
1358        if (get == null) {
1359            desc.delete(PropertyDescriptor.GET, false);
1360        }
1361
1362        if (set == null) {
1363            desc.delete(PropertyDescriptor.SET, false);
1364        }
1365
1366        return desc;
1367    }
1368
1369    private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
1370        final T obj = map.get(key);
1371        if (obj != null) {
1372            return obj;
1373        }
1374
1375        try {
1376            final T newObj = creator.call();
1377            final T existingObj = map.putIfAbsent(key, newObj);
1378            return existingObj != null ? existingObj : newObj;
1379        } catch (final Exception exp) {
1380            throw new RuntimeException(exp);
1381        }
1382    }
1383
1384    private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
1385
1386
1387    /**
1388     * Get cached InvokeByName object for the given key
1389     * @param key key to be associated with InvokeByName object
1390     * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
1391     * @return InvokeByName object associated with the key.
1392     */
1393    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
1394        return getLazilyCreatedValue(key, creator, namedInvokers);
1395    }
1396
1397    private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
1398
1399    /**
1400     * Get cached dynamic method handle for the given key
1401     * @param key key to be associated with dynamic method handle
1402     * @param creator if method handle is absent 'creator' is called to make one (lazy init)
1403     * @return dynamic method handle associated with the key.
1404     */
1405    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
1406        return getLazilyCreatedValue(key, creator, dynamicInvokers);
1407    }
1408
1409    /**
1410     * Hook to search missing variables in ScriptContext if available
1411     * @param self used to detect if scope call or not (this function is 'strict')
1412     * @param name name of the variable missing
1413     * @return value of the missing variable or undefined (or TypeError for scope search)
1414     */
1415    public static Object __noSuchProperty__(final Object self, final Object name) {
1416        final Global global = Global.instance();
1417        final ScriptContext sctxt = global.currentContext();
1418        final String nameStr = name.toString();
1419
1420        if (sctxt != null) {
1421            final int scope = sctxt.getAttributesScope(nameStr);
1422            if (scope != -1) {
1423                return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
1424            }
1425        }
1426
1427        switch (nameStr) {
1428        case "context":
1429            return sctxt;
1430        case "engine":
1431            return global.engine;
1432        default:
1433            break;
1434        }
1435
1436        if (self == UNDEFINED) {
1437            // scope access and so throw ReferenceError
1438            throw referenceError(global, "not.defined", nameStr);
1439        }
1440
1441        return UNDEFINED;
1442    }
1443
1444    /**
1445     * This is the eval used when 'indirect' eval call is made.
1446     *
1447     * var global = this;
1448     * global.eval("print('hello')");
1449     *
1450     * @param self  eval scope
1451     * @param str   eval string
1452     *
1453     * @return the result of eval
1454     */
1455    public static Object eval(final Object self, final Object str) {
1456        return directEval(self, str, UNDEFINED, UNDEFINED, false);
1457    }
1458
1459    /**
1460     * Direct eval
1461     *
1462     * @param self     The scope of eval passed as 'self'
1463     * @param str      Evaluated code
1464     * @param callThis "this" to be passed to the evaluated code
1465     * @param location location of the eval call
1466     * @param strict   is eval called a strict mode code?
1467     *
1468     * @return the return value of the eval
1469     *
1470     * This is directly invoked from generated when eval(code) is called in user code
1471     */
1472    public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
1473        if (!isString(str)) {
1474            return str;
1475        }
1476        final Global global = Global.instanceFrom(self);
1477        final ScriptObject scope = self instanceof ScriptObject && ((ScriptObject)self).isScope() ? (ScriptObject)self : global;
1478
1479        return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
1480    }
1481
1482    /**
1483     * Global print implementation - Nashorn extension
1484     *
1485     * @param self    scope
1486     * @param objects arguments to print
1487     *
1488     * @return result of print (undefined)
1489     */
1490    public static Object print(final Object self, final Object... objects) {
1491        return Global.instanceFrom(self).printImpl(false, objects);
1492    }
1493
1494    /**
1495     * Global println implementation - Nashorn extension
1496     *
1497     * @param self    scope
1498     * @param objects arguments to print
1499     *
1500     * @return result of println (undefined)
1501     */
1502    public static Object println(final Object self, final Object... objects) {
1503        return Global.instanceFrom(self).printImpl(true, objects);
1504    }
1505
1506    /**
1507     * Global load implementation - Nashorn extension
1508     *
1509     * @param self    scope
1510     * @param source  source to load
1511     *
1512     * @return result of load (undefined)
1513     *
1514     * @throws IOException if source could not be read
1515     */
1516    public static Object load(final Object self, final Object source) throws IOException {
1517        final Global global = Global.instanceFrom(self);
1518        final ScriptObject scope = self instanceof ScriptObject ? (ScriptObject)self : global;
1519        return global.getContext().load(scope, source);
1520    }
1521
1522    /**
1523     * Global loadWithNewGlobal implementation - Nashorn extension
1524     *
1525     * @param self scope
1526     * @param args from plus (optional) arguments to be passed to the loaded script
1527     *
1528     * @return result of load (may be undefined)
1529     *
1530     * @throws IOException if source could not be read
1531     */
1532    public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
1533        final Global global = Global.instanceFrom(self);
1534        final int length = args.length;
1535        final boolean hasArgs = 0 < length;
1536        final Object from = hasArgs ? args[0] : UNDEFINED;
1537        final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
1538
1539        return global.getContext().loadWithNewGlobal(from, arguments);
1540    }
1541
1542    /**
1543     * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
1544     *
1545     * @param self  self reference
1546     * @param code  exit code
1547     *
1548     * @return undefined (will never be reached)
1549     */
1550    public static Object exit(final Object self, final Object code) {
1551        System.exit(JSType.toInt32(code));
1552        return UNDEFINED;
1553    }
1554
1555    // builtin prototype accessors
1556
1557    /**
1558     * Get the builtin Object prototype.
1559     * @return the object prototype.
1560     */
1561    public ScriptObject getObjectPrototype() {
1562        return ScriptFunction.getPrototype(builtinObject);
1563    }
1564
1565    ScriptObject getFunctionPrototype() {
1566        return ScriptFunction.getPrototype(builtinFunction);
1567    }
1568
1569    ScriptObject getArrayPrototype() {
1570        return ScriptFunction.getPrototype(builtinArray);
1571    }
1572
1573    ScriptObject getBooleanPrototype() {
1574        return ScriptFunction.getPrototype(builtinBoolean);
1575    }
1576
1577    ScriptObject getNumberPrototype() {
1578        return ScriptFunction.getPrototype(builtinNumber);
1579    }
1580
1581    ScriptObject getDatePrototype() {
1582        return ScriptFunction.getPrototype(getBuiltinDate());
1583    }
1584
1585    ScriptObject getRegExpPrototype() {
1586        return ScriptFunction.getPrototype(getBuiltinRegExp());
1587    }
1588
1589    ScriptObject getStringPrototype() {
1590        return ScriptFunction.getPrototype(builtinString);
1591    }
1592
1593    ScriptObject getErrorPrototype() {
1594        return ScriptFunction.getPrototype(builtinError);
1595    }
1596
1597    ScriptObject getEvalErrorPrototype() {
1598        return ScriptFunction.getPrototype(getBuiltinEvalError());
1599    }
1600
1601    ScriptObject getRangeErrorPrototype() {
1602        return ScriptFunction.getPrototype(getBuiltinRangeError());
1603    }
1604
1605    ScriptObject getReferenceErrorPrototype() {
1606        return ScriptFunction.getPrototype(builtinReferenceError);
1607    }
1608
1609    ScriptObject getSyntaxErrorPrototype() {
1610        return ScriptFunction.getPrototype(builtinSyntaxError);
1611    }
1612
1613    ScriptObject getTypeErrorPrototype() {
1614        return ScriptFunction.getPrototype(builtinTypeError);
1615    }
1616
1617    ScriptObject getURIErrorPrototype() {
1618        return ScriptFunction.getPrototype(getBuiltinURIError());
1619    }
1620
1621    ScriptObject getJavaImporterPrototype() {
1622        return ScriptFunction.getPrototype(getBuiltinJavaImporter());
1623    }
1624
1625    ScriptObject getJSAdapterPrototype() {
1626        return ScriptFunction.getPrototype(getBuiltinJSAdapter());
1627    }
1628
1629    private synchronized ScriptFunction getBuiltinArrayBuffer() {
1630        if (this.builtinArrayBuffer == null) {
1631            this.builtinArrayBuffer = initConstructorAndSwitchPoint("ArrayBuffer", ScriptFunction.class);
1632        }
1633        return this.builtinArrayBuffer;
1634    }
1635
1636    ScriptObject getArrayBufferPrototype() {
1637        return ScriptFunction.getPrototype(getBuiltinArrayBuffer());
1638    }
1639
1640    private synchronized ScriptFunction getBuiltinDataView() {
1641        if (this.builtinDataView == null) {
1642            this.builtinDataView = initConstructorAndSwitchPoint("DataView", ScriptFunction.class);
1643        }
1644        return this.builtinDataView;
1645    }
1646
1647    ScriptObject getDataViewPrototype() {
1648        return ScriptFunction.getPrototype(getBuiltinDataView());
1649    }
1650
1651    private synchronized ScriptFunction getBuiltinInt8Array() {
1652        if (this.builtinInt8Array == null) {
1653            this.builtinInt8Array = initConstructorAndSwitchPoint("Int8Array", ScriptFunction.class);
1654        }
1655        return this.builtinInt8Array;
1656    }
1657
1658    ScriptObject getInt8ArrayPrototype() {
1659        return ScriptFunction.getPrototype(getBuiltinInt8Array());
1660    }
1661
1662    private synchronized ScriptFunction getBuiltinUint8Array() {
1663        if (this.builtinUint8Array == null) {
1664            this.builtinUint8Array = initConstructorAndSwitchPoint("Uint8Array", ScriptFunction.class);
1665        }
1666        return this.builtinUint8Array;
1667    }
1668
1669    ScriptObject getUint8ArrayPrototype() {
1670        return ScriptFunction.getPrototype(getBuiltinUint8Array());
1671    }
1672
1673    private synchronized ScriptFunction getBuiltinUint8ClampedArray() {
1674        if (this.builtinUint8ClampedArray == null) {
1675            this.builtinUint8ClampedArray = initConstructorAndSwitchPoint("Uint8ClampedArray", ScriptFunction.class);
1676        }
1677        return this.builtinUint8ClampedArray;
1678    }
1679
1680    ScriptObject getUint8ClampedArrayPrototype() {
1681        return ScriptFunction.getPrototype(getBuiltinUint8ClampedArray());
1682    }
1683
1684    private synchronized ScriptFunction getBuiltinInt16Array() {
1685        if (this.builtinInt16Array == null) {
1686            this.builtinInt16Array = initConstructorAndSwitchPoint("Int16Array", ScriptFunction.class);
1687        }
1688        return this.builtinInt16Array;
1689    }
1690
1691    ScriptObject getInt16ArrayPrototype() {
1692        return ScriptFunction.getPrototype(getBuiltinInt16Array());
1693    }
1694
1695    private synchronized ScriptFunction getBuiltinUint16Array() {
1696        if (this.builtinUint16Array == null) {
1697            this.builtinUint16Array = initConstructorAndSwitchPoint("Uint16Array", ScriptFunction.class);
1698        }
1699        return this.builtinUint16Array;
1700    }
1701
1702    ScriptObject getUint16ArrayPrototype() {
1703        return ScriptFunction.getPrototype(getBuiltinUint16Array());
1704    }
1705
1706    private synchronized ScriptFunction getBuiltinInt32Array() {
1707        if (this.builtinInt32Array == null) {
1708            this.builtinInt32Array = initConstructorAndSwitchPoint("Int32Array", ScriptFunction.class);
1709        }
1710        return this.builtinInt32Array;
1711    }
1712
1713    ScriptObject getInt32ArrayPrototype() {
1714        return ScriptFunction.getPrototype(getBuiltinInt32Array());
1715    }
1716
1717    private synchronized ScriptFunction getBuiltinUint32Array() {
1718        if (this.builtinUint32Array == null) {
1719            this.builtinUint32Array = initConstructorAndSwitchPoint("Uint32Array", ScriptFunction.class);
1720        }
1721        return this.builtinUint32Array;
1722    }
1723
1724    ScriptObject getUint32ArrayPrototype() {
1725        return ScriptFunction.getPrototype(getBuiltinUint32Array());
1726    }
1727
1728    private synchronized ScriptFunction getBuiltinFloat32Array() {
1729        if (this.builtinFloat32Array == null) {
1730            this.builtinFloat32Array = initConstructorAndSwitchPoint("Float32Array", ScriptFunction.class);
1731        }
1732        return this.builtinFloat32Array;
1733    }
1734
1735    ScriptObject getFloat32ArrayPrototype() {
1736        return ScriptFunction.getPrototype(getBuiltinFloat32Array());
1737    }
1738
1739    private synchronized ScriptFunction getBuiltinFloat64Array() {
1740        if (this.builtinFloat64Array == null) {
1741            this.builtinFloat64Array = initConstructorAndSwitchPoint("Float64Array", ScriptFunction.class);
1742        }
1743        return this.builtinFloat64Array;
1744    }
1745
1746    ScriptObject getFloat64ArrayPrototype() {
1747        return ScriptFunction.getPrototype(getBuiltinFloat64Array());
1748    }
1749
1750    private ScriptFunction getBuiltinArray() {
1751        return builtinArray;
1752    }
1753
1754    ScriptFunction getTypeErrorThrower() {
1755        return typeErrorThrower;
1756    }
1757
1758    /**
1759     * Called from compiled script code to test if builtin has been overridden
1760     *
1761     * @return true if builtin array has not been overridden
1762     */
1763    public static boolean isBuiltinArray() {
1764        final Global instance = Global.instance();
1765        return instance.array == instance.getBuiltinArray();
1766    }
1767
1768    private ScriptFunction getBuiltinBoolean() {
1769        return builtinBoolean;
1770    }
1771
1772    /**
1773     * Called from compiled script code to test if builtin has been overridden
1774     *
1775     * @return true if builtin boolean has not been overridden
1776     */
1777    public static boolean isBuiltinBoolean() {
1778        final Global instance = Global.instance();
1779        return instance._boolean == instance.getBuiltinBoolean();
1780    }
1781
1782    private synchronized ScriptFunction getBuiltinDate() {
1783        if (this.builtinDate == null) {
1784            this.builtinDate = initConstructorAndSwitchPoint("Date", ScriptFunction.class);
1785            final ScriptObject dateProto = ScriptFunction.getPrototype(builtinDate);
1786            // initialize default date
1787            this.DEFAULT_DATE = new NativeDate(NaN, dateProto);
1788        }
1789        return this.builtinDate;
1790    }
1791
1792    /**
1793     * Called from compiled script code to test if builtin has been overridden
1794     *
1795     * @return true if builtin date has not been overridden
1796     */
1797    public static boolean isBuiltinDate() {
1798        final Global instance = Global.instance();
1799        return instance.date == LAZY_SENTINEL || instance.date == instance.getBuiltinDate();
1800    }
1801
1802    private ScriptFunction getBuiltinError() {
1803        return builtinError;
1804    }
1805
1806    /**
1807     * Called from compiled script code to test if builtin has been overridden
1808     *
1809     * @return true if builtin error has not been overridden
1810     */
1811    public static boolean isBuiltinError() {
1812        final Global instance = Global.instance();
1813        return instance.error == instance.getBuiltinError();
1814    }
1815
1816    private synchronized ScriptFunction getBuiltinEvalError() {
1817        if (this.builtinEvalError == null) {
1818            this.builtinEvalError = initErrorSubtype("EvalError", getErrorPrototype());
1819        }
1820        return this.builtinEvalError;
1821    }
1822
1823    /**
1824     * Called from compiled script code to test if builtin has been overridden
1825     *
1826     * @return true if builtin eval error has not been overridden
1827     */
1828    public static boolean isBuiltinEvalError() {
1829        final Global instance = Global.instance();
1830        return instance.evalError == LAZY_SENTINEL || instance.evalError == instance.getBuiltinEvalError();
1831    }
1832
1833    private ScriptFunction getBuiltinFunction() {
1834        return builtinFunction;
1835    }
1836
1837    /**
1838     * Called from compiled script code to test if builtin has been overridden
1839     *
1840     * @return true if builtin function has not been overridden
1841     */
1842    public static boolean isBuiltinFunction() {
1843        final Global instance = Global.instance();
1844        return instance.function == instance.getBuiltinFunction();
1845    }
1846
1847    /**
1848     * Get the switchpoint used to check property changes for Function.prototype.apply
1849     * @return the switchpoint guarding apply (same as guarding call, and everything else in function)
1850     */
1851    public static SwitchPoint getBuiltinFunctionApplySwitchPoint() {
1852        return ScriptFunction.getPrototype(Global.instance().getBuiltinFunction()).getProperty("apply").getBuiltinSwitchPoint();
1853    }
1854
1855    private static boolean isBuiltinFunctionProperty(final String name) {
1856        final Global instance = Global.instance();
1857        final ScriptFunction builtinFunction = instance.getBuiltinFunction();
1858        if (builtinFunction == null) {
1859            return false; //conservative for compile-only mode
1860        }
1861        final boolean isBuiltinFunction = instance.function == builtinFunction;
1862        return isBuiltinFunction && ScriptFunction.getPrototype(builtinFunction).getProperty(name).isBuiltin();
1863    }
1864
1865    /**
1866     * Check if the Function.prototype.apply has not been replaced
1867     * @return true if Function.prototype.apply has been replaced
1868     */
1869    public static boolean isBuiltinFunctionPrototypeApply() {
1870        return isBuiltinFunctionProperty("apply");
1871    }
1872
1873    /**
1874     * Check if the Function.prototype.apply has not been replaced
1875     * @return true if Function.prototype.call has been replaced
1876     */
1877    public static boolean isBuiltinFunctionPrototypeCall() {
1878        return isBuiltinFunctionProperty("call");
1879    }
1880
1881    private synchronized ScriptFunction getBuiltinJSAdapter() {
1882        if (this.builtinJSAdapter == null) {
1883            this.builtinJSAdapter = initConstructorAndSwitchPoint("JSAdapter", ScriptFunction.class);
1884        }
1885        return builtinJSAdapter;
1886    }
1887
1888    /**
1889     * Called from compiled script code to test if builtin has been overridden
1890     *
1891     * @return true if builtin JSAdapter has not been overridden
1892     */
1893    public static boolean isBuiltinJSAdapter() {
1894        final Global instance = Global.instance();
1895        return instance.jsadapter == LAZY_SENTINEL || instance.jsadapter == instance.getBuiltinJSAdapter();
1896    }
1897
1898    private synchronized ScriptObject getBuiltinJSON() {
1899        if (this.builtinJSON == null) {
1900            this.builtinJSON = initConstructorAndSwitchPoint("JSON", ScriptObject.class);
1901        }
1902        return this.builtinJSON;
1903    }
1904
1905    /**
1906     * Called from compiled script code to test if builtin has been overridden
1907     *
1908     * @return true if builtin JSON has has not been overridden
1909     */
1910    public static boolean isBuiltinJSON() {
1911        final Global instance = Global.instance();
1912        return instance.json == LAZY_SENTINEL || instance.json == instance.getBuiltinJSON();
1913    }
1914
1915    private ScriptObject getBuiltinJava() {
1916        return builtinJava;
1917    }
1918
1919    /**
1920     * Called from compiled script code to test if builtin has been overridden
1921     *
1922     * @return true if builtin Java has not been overridden
1923     */
1924    public static boolean isBuiltinJava() {
1925        final Global instance = Global.instance();
1926        return instance.java == instance.getBuiltinJava();
1927    }
1928
1929    private ScriptObject getBuiltinJavax() {
1930        return builtinJavax;
1931    }
1932
1933    /**
1934     * Called from compiled script code to test if builtin has been overridden
1935     *
1936     * @return true if builtin Javax has not been overridden
1937     */
1938    public static boolean isBuiltinJavax() {
1939        final Global instance = Global.instance();
1940        return instance.javax == instance.getBuiltinJavax();
1941    }
1942
1943    private synchronized ScriptFunction getBuiltinJavaImporter() {
1944        if (this.builtinJavaImporter == null) {
1945            this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
1946        }
1947        return this.builtinJavaImporter;
1948    }
1949
1950    private synchronized ScriptObject getBuiltinJavaApi() {
1951        if (this.builtinJavaApi == null) {
1952            this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
1953        }
1954        return this.builtinJavaApi;
1955    }
1956
1957    /**
1958     * Called from compiled script code to test if builtin has been overridden
1959     *
1960     * @return true if builtin Java importer has not been overridden
1961     */
1962    public static boolean isBuiltinJavaImporter() {
1963        final Global instance = Global.instance();
1964        return instance.javaImporter == LAZY_SENTINEL || instance.javaImporter == instance.getBuiltinJavaImporter();
1965    }
1966
1967    /**
1968     * Called from compiled script code to test if builtin has been overridden
1969     *
1970     * @return true if builtin math has not been overridden
1971     */
1972    public static boolean isBuiltinMath() {
1973        final Global instance = Global.instance();
1974        return instance.math == instance.builtinMath;
1975    }
1976
1977    private ScriptFunction getBuiltinNumber() {
1978        return builtinNumber;
1979    }
1980
1981    /**
1982     * Called from compiled script code to test if builtin has been overridden
1983     *
1984     * @return true if builtin number has not been overridden
1985     */
1986    public static boolean isBuiltinNumber() {
1987        final Global instance = Global.instance();
1988        return instance.number == instance.getBuiltinNumber();
1989    }
1990
1991    private ScriptFunction getBuiltinObject() {
1992        return builtinObject;
1993    }
1994
1995    /**
1996     * Called from compiled script code to test if builtin has been overridden
1997     *
1998     * @return true if builtin object has not been overridden
1999     */
2000    public static boolean isBuiltinObject() {
2001        final Global instance = Global.instance();
2002        return instance.object == instance.getBuiltinObject();
2003    }
2004
2005    private ScriptObject getBuiltinPackages() {
2006        return builtinPackages;
2007    }
2008
2009    /**
2010     * Called from compiled script code to test if builtin has been overridden
2011     *
2012     * @return true if builtin package has not been overridden
2013     */
2014    public static boolean isBuiltinPackages() {
2015        final Global instance = Global.instance();
2016        return instance.packages == instance.getBuiltinPackages();
2017    }
2018
2019    private synchronized ScriptFunction getBuiltinRangeError() {
2020        if (this.builtinRangeError == null) {
2021            this.builtinRangeError = initErrorSubtype("RangeError", getErrorPrototype());
2022        }
2023        return builtinRangeError;
2024    }
2025
2026    /**
2027     * Called from compiled script code to test if builtin has been overridden
2028     *
2029     * @return true if builtin range error has not been overridden
2030     */
2031    public static boolean isBuiltinRangeError() {
2032        final Global instance = Global.instance();
2033        return instance.rangeError == LAZY_SENTINEL || instance.rangeError == instance.getBuiltinRangeError();
2034    }
2035
2036    private synchronized ScriptFunction getBuiltinReferenceError() {
2037        return builtinReferenceError;
2038    }
2039
2040    /**
2041     * Called from compiled script code to test if builtin has been overridden
2042     *
2043     * @return true if builtin reference error has not been overridden
2044     */
2045    public static boolean isBuiltinReferenceError() {
2046        final Global instance = Global.instance();
2047        return instance.referenceError == instance.getBuiltinReferenceError();
2048    }
2049
2050    private synchronized ScriptFunction getBuiltinRegExp() {
2051        if (this.builtinRegExp == null) {
2052            this.builtinRegExp = initConstructorAndSwitchPoint("RegExp", ScriptFunction.class);
2053            final ScriptObject regExpProto = ScriptFunction.getPrototype(builtinRegExp);
2054            // initialize default regexp object
2055            this.DEFAULT_REGEXP = new NativeRegExp("(?:)", "", this, regExpProto);
2056            // RegExp.prototype should behave like a RegExp object. So copy the
2057            // properties.
2058            regExpProto.addBoundProperties(DEFAULT_REGEXP);
2059        }
2060        return builtinRegExp;
2061    }
2062
2063    /**
2064     * Called from compiled script code to test if builtin has been overridden
2065     *
2066     * @return true if builtin regexp has not been overridden
2067     */
2068    public static boolean isBuiltinRegExp() {
2069        final Global instance = Global.instance();
2070        return instance.regexp == LAZY_SENTINEL || instance.regexp == instance.getBuiltinRegExp();
2071    }
2072
2073    private ScriptFunction getBuiltinString() {
2074        return builtinString;
2075    }
2076
2077    /**
2078     * Called from compiled script code to test if builtin has been overridden
2079     *
2080     * @return true if builtin Java has not been overridden
2081     */
2082    public static boolean isBuiltinString() {
2083        final Global instance = Global.instance();
2084        return instance.string == instance.getBuiltinString();
2085    }
2086
2087    private ScriptFunction getBuiltinSyntaxError() {
2088        return builtinSyntaxError;
2089    }
2090
2091    /**
2092     * Called from compiled script code to test if builtin has been overridden
2093     *
2094     * @return true if builtin syntax error has not been overridden
2095     */
2096    public static boolean isBuiltinSyntaxError() {
2097        final Global instance = Global.instance();
2098        return instance.syntaxError == instance.getBuiltinSyntaxError();
2099    }
2100
2101    private ScriptFunction getBuiltinTypeError() {
2102        return builtinTypeError;
2103    }
2104
2105    /**
2106     * Called from compiled script code to test if builtin has been overridden
2107     *
2108     * @return true if builtin type error has not been overridden
2109     */
2110    public static boolean isBuiltinTypeError() {
2111        final Global instance = Global.instance();
2112        return instance.typeError == instance.getBuiltinTypeError();
2113    }
2114
2115    private synchronized ScriptFunction getBuiltinURIError() {
2116        if (this.builtinURIError == null) {
2117            this.builtinURIError = initErrorSubtype("URIError", getErrorPrototype());
2118        }
2119        return this.builtinURIError;
2120    }
2121
2122    /**
2123     * Called from compiled script code to test if builtin has been overridden
2124     *
2125     * @return true if builtin URI error has not been overridden
2126     */
2127    public static boolean isBuiltinURIError() {
2128        final Global instance = Global.instance();
2129        return instance.uriError == LAZY_SENTINEL || instance.uriError == instance.getBuiltinURIError();
2130    }
2131
2132    @Override
2133    public String getClassName() {
2134        return "global";
2135    }
2136
2137    /**
2138     * Copy function used to clone NativeRegExp objects.
2139     *
2140     * @param regexp a NativeRegExp to clone
2141     *
2142     * @return copy of the given regexp object
2143     */
2144    public static Object regExpCopy(final Object regexp) {
2145        return new NativeRegExp((NativeRegExp)regexp);
2146    }
2147
2148    /**
2149     * Convert given object to NativeRegExp type.
2150     *
2151     * @param obj object to be converted
2152     * @return NativeRegExp instance
2153     */
2154    public static NativeRegExp toRegExp(final Object obj) {
2155        if (obj instanceof NativeRegExp) {
2156            return (NativeRegExp)obj;
2157        }
2158        return new NativeRegExp(JSType.toString(obj));
2159    }
2160
2161    /**
2162     * ECMA 9.9 ToObject implementation
2163     *
2164     * @param obj  an item for which to run ToObject
2165     * @return ToObject version of given item
2166     */
2167    public static Object toObject(final Object obj) {
2168        if (obj == null || obj == UNDEFINED) {
2169            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2170        }
2171
2172        if (obj instanceof ScriptObject) {
2173            return obj;
2174        }
2175
2176        return instance().wrapAsObject(obj);
2177    }
2178
2179    /**
2180     * Allocate a new object array.
2181     *
2182     * @param initial object values.
2183     * @return the new array
2184     */
2185    public static NativeArray allocate(final Object[] initial) {
2186        ArrayData arrayData = ArrayData.allocate(initial);
2187
2188        for (int index = 0; index < initial.length; index++) {
2189            final Object value = initial[index];
2190
2191            if (value == ScriptRuntime.EMPTY) {
2192                arrayData = arrayData.delete(index);
2193            }
2194        }
2195
2196        return new NativeArray(arrayData);
2197    }
2198
2199    /**
2200     * Allocate a new number array.
2201     *
2202     * @param initial number values.
2203     * @return the new array
2204     */
2205    public static NativeArray allocate(final double[] initial) {
2206        return new NativeArray(ArrayData.allocate(initial));
2207    }
2208
2209    /**
2210     * Allocate a new long array.
2211     *
2212     * @param initial number values.
2213     * @return the new array
2214     */
2215    public static NativeArray allocate(final long[] initial) {
2216        return new NativeArray(ArrayData.allocate(initial));
2217    }
2218
2219    /**
2220     * Allocate a new integer array.
2221     *
2222     * @param initial number values.
2223     * @return the new array
2224     */
2225    public static NativeArray allocate(final int[] initial) {
2226        return new NativeArray(ArrayData.allocate(initial));
2227    }
2228
2229    /**
2230     * Allocate a new object array for arguments.
2231     *
2232     * @param arguments initial arguments passed.
2233     * @param callee reference to the function that uses arguments object
2234     * @param numParams actual number of declared parameters
2235     *
2236     * @return the new array
2237     */
2238    public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
2239        return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
2240    }
2241
2242    /**
2243     * Called from generated to check if given function is the builtin 'eval'. If
2244     * eval is used in a script, a lot of optimizations and assumptions cannot be done.
2245     *
2246     * @param  fn function object that is checked
2247     * @return true if fn is the builtin eval
2248     */
2249    public static boolean isEval(final Object fn) {
2250        return fn == Global.instance().builtinEval;
2251    }
2252
2253    /**
2254     * Called from generated to replace a location property placeholder with the actual location property value.
2255     *
2256     * @param  placeholder the value tested for being a placeholder for a location property
2257     * @param  locationProperty the actual value for the location property
2258     * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
2259     */
2260    public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
2261        return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
2262    }
2263
2264    /**
2265     * Called from runtime internals to check if the passed value is a location property placeholder.
2266     * @param  placeholder the value tested for being a placeholder for a location property
2267     * @return true if the value is a placeholder, false otherwise.
2268     */
2269    public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
2270        return placeholder == LOCATION_PROPERTY_PLACEHOLDER;
2271    }
2272
2273    /**
2274     * Create a new RegExp object.
2275     *
2276     * @param expression Regular expression.
2277     * @param options    Search options.
2278     *
2279     * @return New RegExp object.
2280     */
2281    public static Object newRegExp(final String expression, final String options) {
2282        if (options == null) {
2283            return new NativeRegExp(expression);
2284        }
2285        return new NativeRegExp(expression, options);
2286    }
2287
2288    /**
2289     * Get the object prototype
2290     *
2291     * @return the object prototype
2292     */
2293    public static ScriptObject objectPrototype() {
2294        return Global.instance().getObjectPrototype();
2295    }
2296
2297    /**
2298     * Create a new empty object instance.
2299     *
2300     * @return New empty object.
2301     */
2302    public static ScriptObject newEmptyInstance() {
2303        return Global.instance().newObject();
2304    }
2305
2306    /**
2307     * Check if a given object is a ScriptObject, raises an exception if this is
2308     * not the case
2309     *
2310     * @param obj and object to check
2311     * @return the script object
2312     */
2313    public static ScriptObject checkObject(final Object obj) {
2314        if (!(obj instanceof ScriptObject)) {
2315            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2316        }
2317        return (ScriptObject)obj;
2318    }
2319
2320    /**
2321     * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
2322     * if this object is null or undefined.
2323     *
2324     * @param obj an object to check
2325     */
2326    public static void checkObjectCoercible(final Object obj) {
2327        if (obj == null || obj == UNDEFINED) {
2328            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2329        }
2330    }
2331
2332    /**
2333     * Get the current split state.
2334     *
2335     * @return current split state
2336     */
2337    @Override
2338    public int getSplitState() {
2339        return splitState;
2340    }
2341
2342    /**
2343     * Set the current split state.
2344     *
2345     * @param state current split state
2346     */
2347    @Override
2348    public void setSplitState(final int state) {
2349        splitState = state;
2350    }
2351
2352    /**
2353     * Return the ES6 global scope for lexically declared bindings.
2354     * @return the ES6 lexical global scope.
2355     */
2356    public final ScriptObject getLexicalScope() {
2357        assert context.getEnv()._es6;
2358        return lexicalScope;
2359    }
2360
2361    @Override
2362    public void addBoundProperties(final ScriptObject source, final jdk.nashorn.internal.runtime.Property[] properties) {
2363        PropertyMap ownMap = getMap();
2364        LexicalScope lexScope = null;
2365        PropertyMap lexicalMap = null;
2366        boolean hasLexicalDefinitions = false;
2367
2368        if (context.getEnv()._es6) {
2369            lexScope = (LexicalScope) getLexicalScope();
2370            lexicalMap = lexScope.getMap();
2371
2372            for (final jdk.nashorn.internal.runtime.Property property : properties) {
2373                if (property.isLexicalBinding()) {
2374                    hasLexicalDefinitions = true;
2375                }
2376                // ES6 15.1.8 steps 6. and 7.
2377                final jdk.nashorn.internal.runtime.Property globalProperty = ownMap.findProperty(property.getKey());
2378                if (globalProperty != null && !globalProperty.isConfigurable() && property.isLexicalBinding()) {
2379                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2380                }
2381                final jdk.nashorn.internal.runtime.Property lexicalProperty = lexicalMap.findProperty(property.getKey());
2382                if (lexicalProperty != null && !property.isConfigurable()) {
2383                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2384                }
2385            }
2386        }
2387
2388        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2389            if (property.isLexicalBinding()) {
2390                assert lexScope != null;
2391                lexicalMap = lexScope.addBoundProperty(lexicalMap, source, property);
2392
2393                if (ownMap.findProperty(property.getKey()) != null) {
2394                    // If property exists in the global object invalidate any global constant call sites.
2395                    invalidateGlobalConstant(property.getKey());
2396                }
2397            } else {
2398                ownMap = addBoundProperty(ownMap, source, property);
2399            }
2400        }
2401
2402        setMap(ownMap);
2403
2404        if (hasLexicalDefinitions) {
2405            assert lexScope != null;
2406            lexScope.setMap(lexicalMap);
2407            invalidateLexicalSwitchPoint();
2408        }
2409    }
2410
2411    @Override
2412    public GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2413        final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2414        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2415
2416        if (lexicalScope != null && isScope && !NashornCallSiteDescriptor.isApplyToCall(desc)) {
2417            if (lexicalScope.hasOwnProperty(name)) {
2418                return lexicalScope.findGetMethod(desc, request, operator);
2419            }
2420        }
2421
2422        final GuardedInvocation invocation =  super.findGetMethod(desc, request, operator);
2423
2424        // We want to avoid adding our generic lexical scope switchpoint to global constant invocations,
2425        // because those are invalidated per-key in the addBoundProperties method above.
2426        // We therefor check if the invocation does already have a switchpoint and the property is non-inherited,
2427        // assuming this only applies to global constants. If other non-inherited properties will
2428        // start using switchpoints some time in the future we'll have to revisit this.
2429        if (isScope && context.getEnv()._es6 && (invocation.getSwitchPoints() == null || !hasOwnProperty(name))) {
2430            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2431        }
2432
2433        return invocation;
2434    }
2435
2436    @Override
2437    protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) {
2438        if (lexicalScope != null && start != this && start.isScope()) {
2439            final FindProperty find = lexicalScope.findProperty(key, false);
2440            if (find != null) {
2441                return find;
2442            }
2443        }
2444        return super.findProperty(key, deep, start);
2445    }
2446
2447    @Override
2448    public GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2449        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2450
2451        if (lexicalScope != null && isScope) {
2452            final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2453            if (lexicalScope.hasOwnProperty(name)) {
2454                return lexicalScope.findSetMethod(desc, request);
2455            }
2456        }
2457
2458        final GuardedInvocation invocation = super.findSetMethod(desc, request);
2459
2460        if (isScope && context.getEnv()._es6) {
2461            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2462        }
2463
2464        return invocation;
2465    }
2466
2467    /**
2468     * Adds jjs shell interactive mode builtin functions to global scope.
2469     */
2470    public void addShellBuiltins() {
2471        Object value = ScriptFunctionImpl.makeFunction("input", ShellFunctions.INPUT);
2472        addOwnProperty("input", Attribute.NOT_ENUMERABLE, value);
2473
2474        value = ScriptFunctionImpl.makeFunction("evalinput", ShellFunctions.EVALINPUT);
2475        addOwnProperty("evalinput", Attribute.NOT_ENUMERABLE, value);
2476    }
2477
2478    private synchronized SwitchPoint getLexicalScopeSwitchPoint() {
2479        SwitchPoint switchPoint = lexicalScopeSwitchPoint;
2480        if (switchPoint == null || switchPoint.hasBeenInvalidated()) {
2481            switchPoint = lexicalScopeSwitchPoint = new SwitchPoint();
2482        }
2483        return switchPoint;
2484    }
2485
2486    private synchronized void invalidateLexicalSwitchPoint() {
2487        if (lexicalScopeSwitchPoint != null) {
2488            context.getLogger(GlobalConstants.class).info("Invalidating non-constant globals on lexical scope update");
2489            SwitchPoint.invalidateAll(new SwitchPoint[]{ lexicalScopeSwitchPoint });
2490        }
2491    }
2492
2493
2494    @SuppressWarnings("unused")
2495    private static Object lexicalScopeFilter(final Object self) {
2496        if (self instanceof Global) {
2497            return ((Global) self).getLexicalScope();
2498        }
2499        return self;
2500    }
2501
2502    private <T extends ScriptObject> T initConstructorAndSwitchPoint(final String name, final Class<T> clazz) {
2503        final T func = initConstructor(name, clazz);
2504        tagBuiltinProperties(name, func);
2505        return func;
2506    }
2507
2508    private void init(final ScriptEngine eng) {
2509        assert Context.getGlobal() == this : "this global is not set as current";
2510
2511        final ScriptEnvironment env = getContext().getEnv();
2512
2513        // initialize Function and Object constructor
2514        initFunctionAndObject();
2515
2516        // Now fix Global's own proto.
2517        this.setInitialProto(getObjectPrototype());
2518
2519        // initialize global function properties
2520        this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
2521
2522        this.parseInt = ScriptFunctionImpl.makeFunction("parseInt",   GlobalFunctions.PARSEINT,
2523                    new Specialization[] {
2524                    new Specialization(GlobalFunctions.PARSEINT_Z),
2525                    new Specialization(GlobalFunctions.PARSEINT_I),
2526                    new Specialization(GlobalFunctions.PARSEINT_J),
2527                    new Specialization(GlobalFunctions.PARSEINT_OI),
2528                    new Specialization(GlobalFunctions.PARSEINT_O) });
2529        this.parseFloat = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2530        this.isNaN = ScriptFunctionImpl.makeFunction("isNaN",   GlobalFunctions.IS_NAN,
2531                   new Specialization[] {
2532                        new Specialization(GlobalFunctions.IS_NAN_I),
2533                        new Specialization(GlobalFunctions.IS_NAN_J),
2534                        new Specialization(GlobalFunctions.IS_NAN_D) });
2535        this.parseFloat         = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2536        this.isNaN              = ScriptFunctionImpl.makeFunction("isNaN",      GlobalFunctions.IS_NAN);
2537        this.isFinite           = ScriptFunctionImpl.makeFunction("isFinite",   GlobalFunctions.IS_FINITE);
2538        this.encodeURI          = ScriptFunctionImpl.makeFunction("encodeURI",  GlobalFunctions.ENCODE_URI);
2539        this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
2540        this.decodeURI          = ScriptFunctionImpl.makeFunction("decodeURI",  GlobalFunctions.DECODE_URI);
2541        this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
2542        this.escape             = ScriptFunctionImpl.makeFunction("escape",     GlobalFunctions.ESCAPE);
2543        this.unescape           = ScriptFunctionImpl.makeFunction("unescape",   GlobalFunctions.UNESCAPE);
2544        this.print              = ScriptFunctionImpl.makeFunction("print",      env._print_no_newline ? PRINT : PRINTLN);
2545        this.load               = ScriptFunctionImpl.makeFunction("load",       LOAD);
2546        this.loadWithNewGlobal  = ScriptFunctionImpl.makeFunction("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL);
2547        this.exit               = ScriptFunctionImpl.makeFunction("exit",       EXIT);
2548        this.quit               = ScriptFunctionImpl.makeFunction("quit",       EXIT);
2549
2550        // built-in constructors
2551        this.builtinArray     = initConstructorAndSwitchPoint("Array", ScriptFunction.class);
2552        this.builtinBoolean   = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class);
2553        this.builtinNumber    = initConstructorAndSwitchPoint("Number", ScriptFunction.class);
2554        this.builtinString    = initConstructorAndSwitchPoint("String", ScriptFunction.class);
2555        this.builtinMath      = initConstructorAndSwitchPoint("Math", ScriptObject.class);
2556
2557        // initialize String.prototype.length to 0
2558        // add String.prototype.length
2559        final ScriptObject stringPrototype = getStringPrototype();
2560        stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
2561
2562        // set isArray flag on Array.prototype
2563        final ScriptObject arrayPrototype = getArrayPrototype();
2564        arrayPrototype.setIsArray();
2565
2566        // Error stuff
2567        initErrorObjects();
2568
2569        // java access
2570        if (! env._no_java) {
2571            this.javaApi = LAZY_SENTINEL;
2572            this.javaImporter = LAZY_SENTINEL;
2573            initJavaAccess();
2574        }
2575
2576        if (! env._no_typed_arrays) {
2577            this.arrayBuffer       = LAZY_SENTINEL;
2578            this.dataView          = LAZY_SENTINEL;
2579            this.int8Array         = LAZY_SENTINEL;
2580            this.uint8Array        = LAZY_SENTINEL;
2581            this.uint8ClampedArray = LAZY_SENTINEL;
2582            this.int16Array        = LAZY_SENTINEL;
2583            this.uint16Array       = LAZY_SENTINEL;
2584            this.int32Array        = LAZY_SENTINEL;
2585            this.uint32Array       = LAZY_SENTINEL;
2586            this.float32Array      = LAZY_SENTINEL;
2587            this.float64Array      = LAZY_SENTINEL;
2588        }
2589
2590        if (env._scripting) {
2591            initScripting(env);
2592        }
2593
2594        if (Context.DEBUG) {
2595            boolean debugOkay;
2596            final SecurityManager sm = System.getSecurityManager();
2597            if (sm != null) {
2598                try {
2599                    sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
2600                    debugOkay = true;
2601                } catch (final SecurityException ignored) {
2602                    // if no permission, don't initialize Debug object
2603                    debugOkay = false;
2604                }
2605
2606            } else {
2607                debugOkay = true;
2608            }
2609
2610            if (debugOkay) {
2611                initDebug();
2612            }
2613        }
2614
2615        copyBuiltins();
2616
2617        // expose script (command line) arguments as "arguments" property of global
2618        arguments = wrapAsObject(env.getArguments().toArray());
2619        if (env._scripting) {
2620            // synonym for "arguments" in scripting mode
2621            addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
2622        }
2623
2624        if (eng != null) {
2625            // default file name
2626            addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
2627            // __noSuchProperty__ hook for ScriptContext search of missing variables
2628            final ScriptFunction noSuchProp = ScriptFunctionImpl.makeStrictFunction(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
2629            addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
2630        }
2631    }
2632
2633    private void initErrorObjects() {
2634        // Error objects
2635        this.builtinError = initConstructor("Error", ScriptFunction.class);
2636        final ScriptObject errorProto = getErrorPrototype();
2637
2638        // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
2639        final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
2640        final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
2641        errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
2642        final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
2643        final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
2644        errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
2645        final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
2646        final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
2647        errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
2648        final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
2649        final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
2650        errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
2651
2652        // ECMA 15.11.4.2 Error.prototype.name
2653        // Error.prototype.name = "Error";
2654        errorProto.set(NativeError.NAME, "Error", 0);
2655        // ECMA 15.11.4.3 Error.prototype.message
2656        // Error.prototype.message = "";
2657        errorProto.set(NativeError.MESSAGE, "", 0);
2658
2659        tagBuiltinProperties("Error", builtinError);
2660
2661        this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
2662        this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
2663        this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
2664    }
2665
2666    private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
2667        final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
2668        final ScriptObject prototype = ScriptFunction.getPrototype(cons);
2669        prototype.set(NativeError.NAME, name, 0);
2670        prototype.set(NativeError.MESSAGE, "", 0);
2671        prototype.setInitialProto(errorProto);
2672        tagBuiltinProperties(name, cons);
2673        return cons;
2674    }
2675
2676    private void initJavaAccess() {
2677        final ScriptObject objectProto = getObjectPrototype();
2678        this.builtinPackages = new NativeJavaPackage("", objectProto);
2679        this.builtinCom = new NativeJavaPackage("com", objectProto);
2680        this.builtinEdu = new NativeJavaPackage("edu", objectProto);
2681        this.builtinJava = new NativeJavaPackage("java", objectProto);
2682        this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
2683        this.builtinJavax = new NativeJavaPackage("javax", objectProto);
2684        this.builtinOrg = new NativeJavaPackage("org", objectProto);
2685    }
2686
2687    private void initScripting(final ScriptEnvironment scriptEnv) {
2688        Object value;
2689        value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
2690        addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
2691
2692        value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
2693        addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
2694
2695        final String execName = ScriptingFunctions.EXEC_NAME;
2696        value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
2697        addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
2698
2699        // Nashorn extension: global.echo (scripting-mode-only)
2700        // alias for "print"
2701        value = get("print");
2702        addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
2703
2704        // Nashorn extension: global.$OPTIONS (scripting-mode-only)
2705        final ScriptObject options = newObject();
2706        copyOptions(options, scriptEnv);
2707        addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
2708
2709        // Nashorn extension: global.$ENV (scripting-mode-only)
2710        if (System.getSecurityManager() == null) {
2711            // do not fill $ENV if we have a security manager around
2712            // Retrieve current state of ENV variables.
2713            final ScriptObject env = newObject();
2714            env.putAll(System.getenv(), scriptEnv._strict);
2715
2716            // Some platforms, e.g., Windows, do not define the PWD environment
2717            // variable, so that the $ENV.PWD property needs to be explicitly
2718            // set.
2719            if (!env.containsKey(ScriptingFunctions.PWD_NAME)) {
2720                env.put(ScriptingFunctions.PWD_NAME, System.getProperty("user.dir"), scriptEnv._strict);
2721            }
2722
2723            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
2724        } else {
2725            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2726        }
2727
2728        // add other special properties for exec support
2729        addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2730        addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2731        addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2732    }
2733
2734    private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
2735        for (final Field f : scriptEnv.getClass().getFields()) {
2736            try {
2737                options.set(f.getName(), f.get(scriptEnv), 0);
2738            } catch (final IllegalArgumentException | IllegalAccessException exp) {
2739                throw new RuntimeException(exp);
2740            }
2741        }
2742    }
2743
2744    private void copyBuiltins() {
2745        this.array             = this.builtinArray;
2746        this._boolean          = this.builtinBoolean;
2747        this.error             = this.builtinError;
2748        this.function          = this.builtinFunction;
2749        this.com               = this.builtinCom;
2750        this.edu               = this.builtinEdu;
2751        this.java              = this.builtinJava;
2752        this.javafx            = this.builtinJavafx;
2753        this.javax             = this.builtinJavax;
2754        this.org               = this.builtinOrg;
2755        this.math              = this.builtinMath;
2756        this.number            = this.builtinNumber;
2757        this.object            = this.builtinObject;
2758        this.packages          = this.builtinPackages;
2759        this.referenceError    = this.builtinReferenceError;
2760        this.string            = this.builtinString;
2761        this.syntaxError       = this.builtinSyntaxError;
2762        this.typeError         = this.builtinTypeError;
2763    }
2764
2765    private void initDebug() {
2766        this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
2767    }
2768
2769    private Object printImpl(final boolean newLine, final Object... objects) {
2770        final ScriptContext sc = currentContext();
2771        @SuppressWarnings("resource")
2772        final PrintWriter out = sc != null? new PrintWriter(sc.getWriter()) : getContext().getEnv().getOut();
2773        final StringBuilder sb = new StringBuilder();
2774
2775        for (final Object obj : objects) {
2776            if (sb.length() != 0) {
2777                sb.append(' ');
2778            }
2779
2780            sb.append(JSType.toString(obj));
2781        }
2782
2783        // Print all at once to ensure thread friendly result.
2784        if (newLine) {
2785            out.println(sb.toString());
2786        } else {
2787            out.print(sb.toString());
2788        }
2789
2790        out.flush();
2791
2792        return UNDEFINED;
2793    }
2794
2795    private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
2796        try {
2797            // Assuming class name pattern for built-in JS constructors.
2798            final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
2799
2800            sb.append("Native");
2801            sb.append(name);
2802            sb.append("$Constructor");
2803
2804            final Class<?> funcClass = Class.forName(sb.toString());
2805            final T res = clazz.cast(funcClass.newInstance());
2806
2807            if (res instanceof ScriptFunction) {
2808                // All global constructor prototypes are not-writable,
2809                // not-enumerable and not-configurable.
2810                final ScriptFunction func = (ScriptFunction)res;
2811                func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
2812            }
2813
2814            if (res.getProto() == null) {
2815                res.setInitialProto(getObjectPrototype());
2816            }
2817
2818            res.setIsBuiltin();
2819
2820            return res;
2821        } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
2822            throw new RuntimeException(e);
2823        }
2824    }
2825
2826    private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) {
2827        final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>();
2828
2829        list.addAll(Arrays.asList(func.getMap().getProperties()));
2830
2831        if (func instanceof ScriptFunction) {
2832            final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func);
2833            if (proto != null) {
2834                list.addAll(Arrays.asList(proto.getMap().getProperties()));
2835            }
2836        }
2837
2838        final jdk.nashorn.internal.runtime.Property prop = getProperty(name);
2839        if (prop != null) {
2840            list.add(prop);
2841        }
2842
2843        return list;
2844    }
2845
2846    /**
2847     * Given a builtin object, traverse its properties recursively and associate them with a name that
2848     * will be a key to their invalidation switchpoint.
2849     * @param name name for key
2850     * @param func builtin script object
2851     */
2852    private void tagBuiltinProperties(final String name, final ScriptObject func) {
2853        SwitchPoint sp = context.getBuiltinSwitchPoint(name);
2854        if (sp == null) {
2855            sp = context.newBuiltinSwitchPoint(name);
2856        }
2857
2858        //get all builtin properties in this builtin object and register switchpoints keyed on the propery name,
2859        //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc
2860        for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) {
2861            prop.setBuiltinSwitchPoint(sp);
2862        }
2863    }
2864
2865    // Function and Object constructors are inter-dependent. Also,
2866    // Function.prototype
2867    // functions are not properly initialized. We fix the references here.
2868    // NOTE: be careful if you want to re-order the operations here. You may
2869    // have
2870    // to play with object references carefully!!
2871    private void initFunctionAndObject() {
2872        // First-n-foremost is Function
2873
2874        this.builtinFunction = initConstructor("Function", ScriptFunction.class);
2875
2876        // create global anonymous function
2877        final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
2878        // need to copy over members of Function.prototype to anon function
2879        anon.addBoundProperties(getFunctionPrototype());
2880
2881        // Function.prototype === Object.getPrototypeOf(Function) ===
2882        // <anon-function>
2883        builtinFunction.setInitialProto(anon);
2884        builtinFunction.setPrototype(anon);
2885        anon.set("constructor", builtinFunction, 0);
2886        anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
2887
2888        // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
2889        this.typeErrorThrower = new ScriptFunctionImpl("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER, null, null, 0);
2890        typeErrorThrower.setPrototype(UNDEFINED);
2891        // Non-constructor built-in functions do not have "prototype" property
2892        typeErrorThrower.deleteOwnProperty(typeErrorThrower.getMap().findProperty("prototype"));
2893        typeErrorThrower.preventExtensions();
2894
2895        // now initialize Object
2896        this.builtinObject = initConstructor("Object", ScriptFunction.class);
2897        final ScriptObject ObjectPrototype = getObjectPrototype();
2898        // Object.getPrototypeOf(Function.prototype) === Object.prototype
2899        anon.setInitialProto(ObjectPrototype);
2900
2901        // ES6 draft compliant __proto__ property of Object.prototype
2902        // accessors on Object.prototype for "__proto__"
2903        final ScriptFunction getProto = ScriptFunctionImpl.makeFunction("getProto", NativeObject.GET__PROTO__);
2904        final ScriptFunction setProto = ScriptFunctionImpl.makeFunction("setProto", NativeObject.SET__PROTO__);
2905        ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
2906
2907        // Function valued properties of Function.prototype were not properly
2908        // initialized. Because, these were created before global.function and
2909        // global.object were not initialized.
2910        jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
2911        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2912            final Object key = property.getKey();
2913            final Object value = builtinFunction.get(key);
2914
2915            if (value instanceof ScriptFunction && value != anon) {
2916                final ScriptFunction func = (ScriptFunction)value;
2917                func.setInitialProto(getFunctionPrototype());
2918                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2919                if (prototype != null) {
2920                    prototype.setInitialProto(ObjectPrototype);
2921                }
2922            }
2923        }
2924
2925        // For function valued properties of Object and Object.prototype, make
2926        // sure prototype's proto chain ends with Object.prototype
2927        for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
2928            final Object key = property.getKey();
2929            final Object value = builtinObject.get(key);
2930
2931            if (value instanceof ScriptFunction) {
2932                final ScriptFunction func = (ScriptFunction)value;
2933                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2934                if (prototype != null) {
2935                    prototype.setInitialProto(ObjectPrototype);
2936                }
2937            }
2938        }
2939
2940        properties = getObjectPrototype().getMap().getProperties();
2941
2942        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2943            final Object key   = property.getKey();
2944            if (key.equals("constructor")) {
2945                continue;
2946            }
2947
2948            final Object value = ObjectPrototype.get(key);
2949            if (value instanceof ScriptFunction) {
2950                final ScriptFunction func = (ScriptFunction)value;
2951                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2952                if (prototype != null) {
2953                    prototype.setInitialProto(ObjectPrototype);
2954                }
2955            }
2956        }
2957
2958        tagBuiltinProperties("Object", builtinObject);
2959        tagBuiltinProperties("Function", builtinFunction);
2960        tagBuiltinProperties("Function", anon);
2961    }
2962
2963    private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
2964        return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
2965    }
2966
2967    RegExpResult getLastRegExpResult() {
2968        return lastRegExpResult;
2969    }
2970
2971    void setLastRegExpResult(final RegExpResult regExpResult) {
2972        this.lastRegExpResult = regExpResult;
2973    }
2974
2975    @Override
2976    protected boolean isGlobal() {
2977        return true;
2978    }
2979
2980    /**
2981     * A class representing the ES6 global lexical scope.
2982     */
2983    private static class LexicalScope extends ScriptObject {
2984
2985        LexicalScope(final Global global) {
2986            super(global, PropertyMap.newMap());
2987        }
2988
2989        @Override
2990        protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2991            return filterInvocation(super.findGetMethod(desc, request, operator));
2992        }
2993
2994        @Override
2995        protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2996            return filterInvocation(super.findSetMethod(desc, request));
2997        }
2998
2999        @Override
3000        protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property) {
3001            // We override this method just to make it callable by Global
3002            return super.addBoundProperty(propMap, source, property);
3003        }
3004
3005        private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) {
3006            final MethodType type = invocation.getInvocation().type();
3007            return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER);
3008        }
3009    }
3010
3011}
3012