Global.java revision 1322:87f7ef8273bc 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.objects;
27
28import static jdk.nashorn.internal.lookup.Lookup.MH;
29import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
30import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
31import static jdk.nashorn.internal.runtime.JSType.isString;
32import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
33
34import java.io.IOException;
35import java.io.PrintWriter;
36import java.lang.invoke.MethodHandle;
37import java.lang.invoke.MethodHandles;
38import java.lang.invoke.MethodType;
39import java.lang.invoke.SwitchPoint;
40import java.lang.reflect.Field;
41import java.util.ArrayList;
42import java.util.Arrays;
43import java.util.List;
44import java.util.Map;
45import java.util.Objects;
46import java.util.concurrent.Callable;
47import java.util.concurrent.ConcurrentHashMap;
48import javax.script.ScriptContext;
49import javax.script.ScriptEngine;
50import jdk.internal.dynalink.CallSiteDescriptor;
51import jdk.internal.dynalink.linker.GuardedInvocation;
52import jdk.internal.dynalink.linker.LinkRequest;
53import jdk.nashorn.api.scripting.ClassFilter;
54import jdk.nashorn.api.scripting.ScriptObjectMirror;
55import jdk.nashorn.internal.lookup.Lookup;
56import jdk.nashorn.internal.objects.annotations.Attribute;
57import jdk.nashorn.internal.objects.annotations.Getter;
58import jdk.nashorn.internal.objects.annotations.Property;
59import jdk.nashorn.internal.objects.annotations.ScriptClass;
60import jdk.nashorn.internal.objects.annotations.Setter;
61import jdk.nashorn.internal.runtime.Context;
62import jdk.nashorn.internal.runtime.ECMAErrors;
63import jdk.nashorn.internal.runtime.FindProperty;
64import jdk.nashorn.internal.runtime.GlobalConstants;
65import jdk.nashorn.internal.runtime.GlobalFunctions;
66import jdk.nashorn.internal.runtime.JSType;
67import jdk.nashorn.internal.runtime.NativeJavaPackage;
68import jdk.nashorn.internal.runtime.PropertyDescriptor;
69import jdk.nashorn.internal.runtime.PropertyMap;
70import jdk.nashorn.internal.runtime.Scope;
71import jdk.nashorn.internal.runtime.ScriptEnvironment;
72import jdk.nashorn.internal.runtime.ScriptFunction;
73import jdk.nashorn.internal.runtime.ScriptObject;
74import jdk.nashorn.internal.runtime.ScriptRuntime;
75import jdk.nashorn.internal.runtime.ScriptingFunctions;
76import jdk.nashorn.internal.runtime.Specialization;
77import jdk.nashorn.internal.runtime.arrays.ArrayData;
78import jdk.nashorn.internal.runtime.linker.Bootstrap;
79import jdk.nashorn.internal.runtime.linker.InvokeByName;
80import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
81import jdk.nashorn.internal.runtime.regexp.RegExpResult;
82import jdk.nashorn.internal.scripts.JD;
83import jdk.nashorn.internal.scripts.JO;
84import jdk.nashorn.tools.ShellFunctions;
85
86/**
87 * Representation of global scope.
88 */
89@ScriptClass("Global")
90public final class Global extends ScriptObject implements Scope {
91    // Placeholder value used in place of a location property (__FILE__, __DIR__, __LINE__)
92    private static final Object LOCATION_PROPERTY_PLACEHOLDER = new Object();
93    private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
94    private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
95
96    // placeholder value for lazily initialized global objects
97    private static final Object LAZY_SENTINEL = new Object();
98
99    /**
100     * Optimistic builtin names that require switchpoint invalidation
101     * upon assignment. Overly conservative, but works for now, to avoid
102     * any complicated scope checks and especially heavy weight guards
103     * like
104     *
105     * <pre>
106     *     public boolean setterGuard(final Object receiver) {
107     *         final Global          global = Global.instance();
108     *         final ScriptObject    sobj   = global.getFunctionPrototype();
109     *         final Object          apply  = sobj.get("apply");
110     *         return apply == receiver;
111     *     }
112     * </pre>
113     *
114     * Naturally, checking for builtin classes like NativeFunction is cheaper,
115     * it's when you start adding property checks for said builtins you have
116     * problems with guard speed.
117     */
118
119    /** Nashorn extension: arguments array */
120    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
121    public Object arguments;
122
123    /** ECMA 15.1.2.2 parseInt (string , radix) */
124    @Property(attributes = Attribute.NOT_ENUMERABLE)
125    public Object parseInt;
126
127    /** ECMA 15.1.2.3 parseFloat (string) */
128    @Property(attributes = Attribute.NOT_ENUMERABLE)
129    public Object parseFloat;
130
131    /** ECMA 15.1.2.4 isNaN (number) */
132    @Property(attributes = Attribute.NOT_ENUMERABLE)
133    public Object isNaN;
134
135    /** ECMA 15.1.2.5 isFinite (number) */
136    @Property(attributes = Attribute.NOT_ENUMERABLE)
137    public Object isFinite;
138
139    /** ECMA 15.1.3.3 encodeURI */
140    @Property(attributes = Attribute.NOT_ENUMERABLE)
141    public Object encodeURI;
142
143    /** ECMA 15.1.3.4 encodeURIComponent */
144    @Property(attributes = Attribute.NOT_ENUMERABLE)
145    public Object encodeURIComponent;
146
147    /** ECMA 15.1.3.1 decodeURI */
148    @Property(attributes = Attribute.NOT_ENUMERABLE)
149    public Object decodeURI;
150
151    /** ECMA 15.1.3.2 decodeURIComponent */
152    @Property(attributes = Attribute.NOT_ENUMERABLE)
153    public Object decodeURIComponent;
154
155    /** ECMA B.2.1 escape (string) */
156    @Property(attributes = Attribute.NOT_ENUMERABLE)
157    public Object escape;
158
159    /** ECMA B.2.2 unescape (string) */
160    @Property(attributes = Attribute.NOT_ENUMERABLE)
161    public Object unescape;
162
163    /** Nashorn extension: global.print */
164    @Property(attributes = Attribute.NOT_ENUMERABLE)
165    public Object print;
166
167    /** Nashorn extension: global.load */
168    @Property(attributes = Attribute.NOT_ENUMERABLE)
169    public Object load;
170
171    /** Nashorn extension: global.loadWithNewGlobal */
172    @Property(attributes = Attribute.NOT_ENUMERABLE)
173    public Object loadWithNewGlobal;
174
175    /** Nashorn extension: global.exit */
176    @Property(attributes = Attribute.NOT_ENUMERABLE)
177    public Object exit;
178
179    /** Nashorn extension: global.quit */
180    @Property(attributes = Attribute.NOT_ENUMERABLE)
181    public Object quit;
182
183    /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
184    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
185    public final double NaN = Double.NaN;
186
187    /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
188    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
189    public final double Infinity = Double.POSITIVE_INFINITY;
190
191    /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
192    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
193    public final Object undefined = UNDEFINED;
194
195    /** ECMA 15.1.2.1 eval(x) */
196    @Property(attributes = Attribute.NOT_ENUMERABLE)
197    public Object eval;
198
199    /** ECMA 15.1.4.1 Object constructor. */
200    @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
201    public volatile Object object;
202
203    /** ECMA 15.1.4.2 Function constructor. */
204    @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
205    public volatile Object function;
206
207    /** ECMA 15.1.4.3 Array constructor. */
208    @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
209    public volatile Object array;
210
211    /** ECMA 15.1.4.4 String constructor */
212    @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
213    public volatile Object string;
214
215    /** ECMA 15.1.4.5 Boolean constructor */
216    @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
217    public volatile Object _boolean;
218
219    /** ECMA 15.1.4.6 - Number constructor */
220    @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
221    public volatile Object number;
222
223    /**
224     * Getter for ECMA 15.1.4.7 Date property
225     *
226     * @param self self reference
227     * @return Date property value
228     */
229    @Getter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
230    public static Object getDate(final Object self) {
231        final Global global = Global.instanceFrom(self);
232        if (global.date == LAZY_SENTINEL) {
233            global.date = global.getBuiltinDate();
234        }
235        return global.date;
236    }
237
238    /**
239     * Setter for ECMA 15.1.4.7 Date property
240     *
241     * @param self self reference
242     * @param value value for the Date property
243     */
244    @Setter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
245    public static void setDate(final Object self, final Object value) {
246        final Global global = Global.instanceFrom(self);
247        global.date = value;
248    }
249
250    private volatile Object date = LAZY_SENTINEL;
251
252    /**
253     * Getter for ECMA 15.1.4.8 RegExp property
254     *
255     * @param self self reference
256     * @return RegExp property value
257     */
258    @Getter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
259    public static Object getRegExp(final Object self) {
260        final Global global = Global.instanceFrom(self);
261        if (global.regexp == LAZY_SENTINEL) {
262            global.regexp = global.getBuiltinRegExp();
263        }
264        return global.regexp;
265    }
266
267    /**
268     * Setter for ECMA 15.1.4.8 RegExp property
269     *
270     * @param self self reference
271     * @param value value for the RegExp property
272     */
273    @Setter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
274    public static void setRegExp(final Object self, final Object value) {
275        final Global global = Global.instanceFrom(self);
276        global.regexp = value;
277    }
278
279    private volatile Object regexp = LAZY_SENTINEL;
280
281    /**
282     * Getter for ECMA 15.12 - The JSON property
283     * @param self self reference
284     * @return the value of JSON property
285     */
286    @Getter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
287    public static Object getJSON(final Object self) {
288        final Global global = Global.instanceFrom(self);
289        if (global.json == LAZY_SENTINEL) {
290            global.json = global.getBuiltinJSON();
291        }
292        return global.json;
293    }
294
295    /**
296     * Setter for ECMA 15.12 - The JSON property
297     * @param self self reference
298     * @param value value for the JSON property
299     */
300    @Setter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
301    public static void setJSON(final Object self, final Object value) {
302        final Global global = Global.instanceFrom(self);
303        global.json = value;
304    }
305
306    private volatile Object json = LAZY_SENTINEL;
307
308    /**
309     * Getter for Nashorn extension: global.JSAdapter
310     * @param self self reference
311     * @return value of the JSAdapter property
312     */
313    @Getter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
314    public static Object getJSAdapter(final Object self) {
315        final Global global = Global.instanceFrom(self);
316        if (global.jsadapter == LAZY_SENTINEL) {
317            global.jsadapter = global.getBuiltinJSAdapter();
318        }
319        return global.jsadapter;
320    }
321
322    /**
323     * Setter for Nashorn extension: global.JSAdapter
324     * @param self self reference
325     * @param value value for the JSAdapter property
326     */
327    @Setter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
328    public static void setJSAdapter(final Object self, final Object value) {
329        final Global global = Global.instanceFrom(self);
330        global.jsadapter = value;
331    }
332
333    private volatile Object jsadapter = LAZY_SENTINEL;
334
335    /** ECMA 15.8 - The Math object */
336    @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
337    public volatile Object math;
338
339    /** Error object */
340    @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
341    public volatile Object error;
342
343    /**
344     * Getter for the EvalError property
345     * @param self self reference
346     * @return the value of EvalError property
347     */
348    @Getter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
349    public static Object getEvalError(final Object self) {
350        final Global global = Global.instanceFrom(self);
351        if (global.evalError == LAZY_SENTINEL) {
352            global.evalError = global.getBuiltinEvalError();
353        }
354        return global.evalError;
355    }
356
357    /**
358     * Setter for the EvalError property
359     * @param self self reference
360     * @param value value of the EvalError property
361     */
362    @Setter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
363    public static void setEvalError(final Object self, final Object value) {
364        final Global global = Global.instanceFrom(self);
365        global.evalError = value;
366    }
367
368    private volatile Object evalError = LAZY_SENTINEL;
369
370    /**
371     * Getter for the RangeError property.
372     * @param self self reference
373     * @return the value of RangeError property
374     */
375    @Getter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
376    public static Object getRangeError(final Object self) {
377        final Global global = Global.instanceFrom(self);
378        if (global.rangeError == LAZY_SENTINEL) {
379            global.rangeError = global.getBuiltinRangeError();
380        }
381        return global.rangeError;
382    }
383
384
385    /**
386     * Setter for the RangeError property.
387     * @param self self reference
388     * @param value value for the RangeError property
389     */
390    @Setter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
391    public static void setRangeError(final Object self, final Object value) {
392        final Global global = Global.instanceFrom(self);
393        global.rangeError = value;
394    }
395
396    private volatile Object rangeError = LAZY_SENTINEL;
397
398    /** ReferenceError object */
399    @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
400    public volatile Object referenceError;
401
402    /** SyntaxError object */
403    @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
404    public volatile Object syntaxError;
405
406    /** TypeError object */
407    @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
408    public volatile Object typeError;
409
410    /**
411     * Getter for the URIError property.
412     * @param self self reference
413     * @return the value of URIError property
414     */
415    @Getter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
416    public static Object getURIError(final Object self) {
417        final Global global = Global.instanceFrom(self);
418        if (global.uriError == LAZY_SENTINEL) {
419            global.uriError = global.getBuiltinURIError();
420        }
421        return global.uriError;
422    }
423
424    /**
425     * Setter for the URIError property.
426     * @param self self reference
427     * @param value value for the URIError property
428     */
429    @Setter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
430    public static void setURIError(final Object self, final Object value) {
431        final Global global = Global.instanceFrom(self);
432        global.uriError = value;
433    }
434
435    private volatile Object uriError = LAZY_SENTINEL;
436
437    /**
438     * Getter for the ArrayBuffer property.
439     * @param self self reference
440     * @return the value of the ArrayBuffer property
441     */
442    @Getter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
443    public static Object getArrayBuffer(final Object self) {
444        final Global global = Global.instanceFrom(self);
445        if (global.arrayBuffer == LAZY_SENTINEL) {
446            global.arrayBuffer = global.getBuiltinArrayBuffer();
447        }
448        return global.arrayBuffer;
449    }
450
451    /**
452     * Setter for the ArrayBuffer property.
453     * @param self self reference
454     * @param value value of the ArrayBuffer property
455     */
456    @Setter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
457    public static void setArrayBuffer(final Object self, final Object value) {
458        final Global global = Global.instanceFrom(self);
459        global.arrayBuffer = value;
460    }
461
462    private volatile Object arrayBuffer;
463
464    /**
465     * Getter for the DataView property.
466     * @param self self reference
467     * @return the value of the DataView property
468     */
469    @Getter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
470    public static Object getDataView(final Object self) {
471        final Global global = Global.instanceFrom(self);
472        if (global.dataView == LAZY_SENTINEL) {
473            global.dataView = global.getBuiltinDataView();
474        }
475        return global.dataView;
476    }
477
478
479    /**
480     * Setter for the DataView property.
481     * @param self self reference
482     * @param value value of the DataView property
483     */
484    @Setter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
485    public static void setDataView(final Object self, final Object value) {
486        final Global global = Global.instanceFrom(self);
487        global.dataView = value;
488    }
489
490    private volatile Object dataView;
491
492    /**
493     * Getter for the Int8Array property.
494     * @param self self reference
495     * @return the value of the Int8Array property.
496     */
497    @Getter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
498    public static Object getInt8Array(final Object self) {
499        final Global global = Global.instanceFrom(self);
500        if (global.int8Array == LAZY_SENTINEL) {
501            global.int8Array = global.getBuiltinInt8Array();
502        }
503        return global.int8Array;
504    }
505
506    /**
507     * Setter for the Int8Array property.
508     * @param self self reference
509     * @param value value of the Int8Array property
510     */
511    @Setter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
512    public static void setInt8Array(final Object self, final Object value) {
513        final Global global = Global.instanceFrom(self);
514        global.int8Array = value;
515    }
516
517    private volatile Object int8Array;
518
519    /**
520     * Getter for the Uin8Array property.
521     * @param self self reference
522     * @return the value of the Uint8Array property
523     */
524    @Getter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
525    public static Object getUint8Array(final Object self) {
526        final Global global = Global.instanceFrom(self);
527        if (global.uint8Array == LAZY_SENTINEL) {
528            global.uint8Array = global.getBuiltinUint8Array();
529        }
530        return global.uint8Array;
531    }
532
533    /**
534     * Setter for the Uin8Array property.
535     * @param self self reference
536     * @param value value of the Uin8Array property
537     */
538    @Setter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
539    public static void setUint8Array(final Object self, final Object value) {
540        final Global global = Global.instanceFrom(self);
541        global.uint8Array = value;
542    }
543
544    private volatile Object uint8Array;
545
546    /**
547     * Getter for the Uint8ClampedArray property.
548     * @param self self reference
549     * @return the value of the Uint8ClampedArray property
550     */
551    @Getter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
552    public static Object getUint8ClampedArray(final Object self) {
553        final Global global = Global.instanceFrom(self);
554        if (global.uint8ClampedArray == LAZY_SENTINEL) {
555            global.uint8ClampedArray = global.getBuiltinUint8ClampedArray();
556        }
557        return global.uint8ClampedArray;
558    }
559
560    /**
561     * Setter for the Uint8ClampedArray property.
562     * @param self self reference
563     * @param value value of the Uint8ClampedArray property
564     */
565    @Setter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
566    public static void setUint8ClampedArray(final Object self, final Object value) {
567        final Global global = Global.instanceFrom(self);
568        global.uint8ClampedArray = value;
569    }
570
571    private volatile Object uint8ClampedArray;
572
573    /**
574     * Getter for the Int16Array property.
575     * @param self self reference
576     * @return the value of the Int16Array property
577     */
578    @Getter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
579    public static Object getInt16Array(final Object self) {
580        final Global global = Global.instanceFrom(self);
581        if (global.int16Array == LAZY_SENTINEL) {
582            global.int16Array = global.getBuiltinInt16Array();
583        }
584        return global.int16Array;
585    }
586
587    /**
588     * Setter for the Int16Array property.
589     * @param self self reference
590     * @param value value of the Int16Array property
591     */
592    @Setter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
593    public static void setInt16Array(final Object self, final Object value) {
594        final Global global = Global.instanceFrom(self);
595        global.int16Array = value;
596    }
597
598    private volatile Object int16Array;
599
600    /**
601     * Getter for the Uint16Array property.
602     * @param self self reference
603     * @return the value of the Uint16Array property
604     */
605    @Getter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
606    public static Object getUint16Array(final Object self) {
607        final Global global = Global.instanceFrom(self);
608        if (global.uint16Array == LAZY_SENTINEL) {
609            global.uint16Array = global.getBuiltinUint16Array();
610        }
611        return global.uint16Array;
612    }
613
614    /**
615     * Setter for the Uint16Array property.
616     * @param self self reference
617     * @param value value of the Uint16Array property
618     */
619    @Setter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
620    public static void setUint16Array(final Object self, final Object value) {
621        final Global global = Global.instanceFrom(self);
622        global.uint16Array = value;
623    }
624
625    private volatile Object uint16Array;
626
627    /**
628     * Getter for the Int32Array property.
629     *
630     * @param self self reference
631     * @return the value of the Int32Array property
632     */
633    @Getter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
634    public static Object getInt32Array(final Object self) {
635        final Global global = Global.instanceFrom(self);
636        if (global.int32Array == LAZY_SENTINEL) {
637            global.int32Array = global.getBuiltinInt32Array();
638        }
639        return global.int32Array;
640    }
641
642
643    /**
644     * Setter for the Int32Array property.
645     *
646     * @param self self reference
647     * @param value value of the Int32Array property
648     */
649    @Setter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
650    public static void setInt32Array(final Object self, final Object value) {
651        final Global global = Global.instanceFrom(self);
652        global.int32Array = value;
653    }
654
655    private volatile Object int32Array;
656
657    /**
658     * Getter of the Uint32Array property.
659     *
660     * @param self self reference
661     * @return the value of the Uint32Array property
662     */
663    @Getter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
664    public static Object getUint32Array(final Object self) {
665        final Global global = Global.instanceFrom(self);
666        if (global.uint32Array == LAZY_SENTINEL) {
667            global.uint32Array = global.getBuiltinUint32Array();
668        }
669        return global.uint32Array;
670    }
671
672
673    /**
674     * Setter of the Uint32Array property.
675     *
676     * @param self self reference
677     * @param value value of the Uint32Array property
678     */
679    @Setter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
680    public static void setUint32Array(final Object self, final Object value) {
681        final Global global = Global.instanceFrom(self);
682        global.uint32Array = value;
683    }
684
685    private volatile Object uint32Array;
686
687    /**
688     * Getter for the Float32Array property.
689     *
690     * @param self self reference
691     * @return the value of the Float32Array property
692     */
693    @Getter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
694    public static Object getFloat32Array(final Object self) {
695        final Global global = Global.instanceFrom(self);
696        if (global.float32Array == LAZY_SENTINEL) {
697            global.float32Array = global.getBuiltinFloat32Array();
698        }
699        return global.float32Array;
700    }
701
702    /**
703     * Setter for the Float32Array property.
704     *
705     * @param self self reference
706     * @param value value of the Float32Array property
707     */
708    @Setter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
709    public static void setFloat32Array(final Object self, final Object value) {
710        final Global global = Global.instanceFrom(self);
711        global.float32Array = value;
712    }
713
714    private volatile Object float32Array;
715
716    /**
717     * Getter for the Float64Array property.
718     *
719     * @param self self reference
720     * @return the value of the Float64Array property
721     */
722    @Getter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
723    public static Object getFloat64Array(final Object self) {
724        final Global global = Global.instanceFrom(self);
725        if (global.float64Array == LAZY_SENTINEL) {
726            global.float64Array = global.getBuiltinFloat64Array();
727        }
728        return global.float64Array;
729    }
730
731    /**
732     * Setter for the Float64Array property.
733     *
734     * @param self self reference
735     * @param value value of the Float64Array property
736     */
737    @Setter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
738    public static void setFloat64Array(final Object self, final Object value) {
739        final Global global = Global.instanceFrom(self);
740        global.float64Array = value;
741    }
742
743    private volatile Object float64Array;
744
745    /** Nashorn extension: Java access - global.Packages */
746    @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
747    public volatile Object packages;
748
749    /** Nashorn extension: Java access - global.com */
750    @Property(attributes = Attribute.NOT_ENUMERABLE)
751    public volatile Object com;
752
753    /** Nashorn extension: Java access - global.edu */
754    @Property(attributes = Attribute.NOT_ENUMERABLE)
755    public volatile Object edu;
756
757    /** Nashorn extension: Java access - global.java */
758    @Property(attributes = Attribute.NOT_ENUMERABLE)
759    public volatile Object java;
760
761    /** Nashorn extension: Java access - global.javafx */
762    @Property(attributes = Attribute.NOT_ENUMERABLE)
763    public volatile Object javafx;
764
765    /** Nashorn extension: Java access - global.javax */
766    @Property(attributes = Attribute.NOT_ENUMERABLE)
767    public volatile Object javax;
768
769    /** Nashorn extension: Java access - global.org */
770    @Property(attributes = Attribute.NOT_ENUMERABLE)
771    public volatile Object org;
772
773    /**
774     * Getter for the Nashorn extension: Java access - global.javaImporter.
775     *
776     * @param self self reference
777     * @return the value of the JavaImporter property
778     */
779    @Getter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
780    public static Object getJavaImporter(final Object self) {
781        final Global global = Global.instanceFrom(self);
782        if (global.javaImporter == LAZY_SENTINEL) {
783            global.javaImporter = global.getBuiltinJavaImporter();
784        }
785        return global.javaImporter;
786    }
787
788    /**
789     * Setter for the Nashorn extension: Java access - global.javaImporter.
790     *
791     * @param self self reference
792     * @param value value of the JavaImporter property
793     */
794    @Setter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
795    public static void setJavaImporter(final Object self, final Object value) {
796        final Global global = Global.instanceFrom(self);
797        global.javaImporter = value;
798    }
799
800    private volatile Object javaImporter;
801
802    /**
803     * Getter for the Nashorn extension: global.Java property.
804     *
805     * @param self self reference
806     * @return the value of the Java property
807     */
808    @Getter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
809    public static Object getJavaApi(final Object self) {
810        final Global global = Global.instanceFrom(self);
811        if (global.javaApi == LAZY_SENTINEL) {
812            global.javaApi = global.getBuiltinJavaApi();
813        }
814        return global.javaApi;
815    }
816
817    /**
818     * Setter for the Nashorn extension: global.Java property.
819     *
820     * @param self self reference
821     * @param value value of the Java property
822     */
823    @Setter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
824    public static void setJavaApi(final Object self, final Object value) {
825        final Global global = Global.instanceFrom(self);
826        global.javaApi = value;
827    }
828
829    private volatile Object javaApi;
830
831    /** Nashorn extension: current script's file name */
832    @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
833    public final Object __FILE__ = LOCATION_PROPERTY_PLACEHOLDER;
834
835    /** Nashorn extension: current script's directory */
836    @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
837    public final Object __DIR__ = LOCATION_PROPERTY_PLACEHOLDER;
838
839    /** Nashorn extension: current source line number being executed */
840    @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
841    public final Object __LINE__ = LOCATION_PROPERTY_PLACEHOLDER;
842
843    private volatile NativeDate DEFAULT_DATE;
844
845    /** Used as Date.prototype's default value */
846    NativeDate getDefaultDate() {
847        return DEFAULT_DATE;
848    }
849
850    private volatile NativeRegExp DEFAULT_REGEXP;
851
852    /** Used as RegExp.prototype's default value */
853    NativeRegExp getDefaultRegExp() {
854        return DEFAULT_REGEXP;
855    }
856
857    /*
858     * Built-in constructor objects: Even if user changes dynamic values of
859     * "Object", "Array" etc., we still want to keep original values of these
860     * constructors here. For example, we need to be able to create array,
861     * regexp literals even after user overwrites global "Array" or "RegExp"
862     * constructor - see also ECMA 262 spec. Annex D.
863     */
864    private ScriptFunction builtinFunction;
865    private ScriptFunction builtinObject;
866    private ScriptFunction builtinArray;
867    private ScriptFunction builtinBoolean;
868    private ScriptFunction builtinDate;
869    private ScriptObject   builtinJSON;
870    private ScriptFunction builtinJSAdapter;
871    private ScriptObject   builtinMath;
872    private ScriptFunction builtinNumber;
873    private ScriptFunction builtinRegExp;
874    private ScriptFunction builtinString;
875    private ScriptFunction builtinError;
876    private ScriptFunction builtinEval;
877    private ScriptFunction builtinEvalError;
878    private ScriptFunction builtinRangeError;
879    private ScriptFunction builtinReferenceError;
880    private ScriptFunction builtinSyntaxError;
881    private ScriptFunction builtinTypeError;
882    private ScriptFunction builtinURIError;
883    private ScriptObject   builtinPackages;
884    private ScriptObject   builtinCom;
885    private ScriptObject   builtinEdu;
886    private ScriptObject   builtinJava;
887    private ScriptObject   builtinJavafx;
888    private ScriptObject   builtinJavax;
889    private ScriptObject   builtinOrg;
890    private ScriptFunction builtinJavaImporter;
891    private ScriptObject   builtinJavaApi;
892    private ScriptFunction builtinArrayBuffer;
893    private ScriptFunction builtinDataView;
894    private ScriptFunction builtinInt8Array;
895    private ScriptFunction builtinUint8Array;
896    private ScriptFunction builtinUint8ClampedArray;
897    private ScriptFunction builtinInt16Array;
898    private ScriptFunction builtinUint16Array;
899    private ScriptFunction builtinInt32Array;
900    private ScriptFunction builtinUint32Array;
901    private ScriptFunction builtinFloat32Array;
902    private ScriptFunction builtinFloat64Array;
903
904    /*
905     * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
906     */
907    private ScriptFunction typeErrorThrower;
908
909    // Flag to indicate that a split method issued a return statement
910    private int splitState = -1;
911
912    // Used to store the last RegExp result to support deprecated RegExp constructor properties
913    private RegExpResult lastRegExpResult;
914
915    private static final MethodHandle EVAL                 = findOwnMH_S("eval",                Object.class, Object.class, Object.class);
916    private static final MethodHandle NO_SUCH_PROPERTY     = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
917    private static final MethodHandle PRINT                = findOwnMH_S("print",               Object.class, Object.class, Object[].class);
918    private static final MethodHandle PRINTLN              = findOwnMH_S("println",             Object.class, Object.class, Object[].class);
919    private static final MethodHandle LOAD                 = findOwnMH_S("load",                Object.class, Object.class, Object.class);
920    private static final MethodHandle LOAD_WITH_NEW_GLOBAL = findOwnMH_S("loadWithNewGlobal",   Object.class, Object.class, Object[].class);
921    private static final MethodHandle EXIT                 = findOwnMH_S("exit",                Object.class, Object.class, Object.class);
922    private static final MethodHandle LEXICAL_SCOPE_FILTER = findOwnMH_S("lexicalScopeFilter",  Object.class, Object.class);
923
924    // initialized by nasgen
925    private static PropertyMap $nasgenmap$;
926
927    // context to which this global belongs to
928    private final Context context;
929
930    // current ScriptContext to use - can be null.
931    private ThreadLocal<ScriptContext> scontext;
932    // current ScriptEngine associated - can be null.
933    private ScriptEngine engine;
934    // initial ScriptContext - can be null
935    private volatile ScriptContext initscontext;
936
937    // ES6 global lexical scope.
938    private final LexicalScope lexicalScope;
939
940    // Switchpoint for non-constant global callsites in the presence of ES6 lexical scope.
941    private SwitchPoint lexicalScopeSwitchPoint;
942
943    /**
944     * Set the current script context
945     * @param ctxt script context
946     */
947    public void setScriptContext(final ScriptContext ctxt) {
948        assert scontext != null;
949        scontext.set(ctxt);
950    }
951
952    /**
953     * Get the current script context
954     * @return current script context
955     */
956    public ScriptContext getScriptContext() {
957        assert scontext != null;
958        return scontext.get();
959    }
960
961    private ScriptContext currentContext() {
962        final ScriptContext sc = scontext != null? scontext.get() : null;
963        return sc == null? initscontext : sc;
964    }
965
966    @Override
967    protected Context getContext() {
968        return context;
969    }
970
971    @Override
972    protected boolean useDualFields() {
973        return context.useDualFields();
974    }
975
976    // performs initialization checks for Global constructor and returns the
977    // PropertyMap, if everything is fine.
978    private static PropertyMap checkAndGetMap(final Context context) {
979        // security check first
980        final SecurityManager sm = System.getSecurityManager();
981        if (sm != null) {
982            sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
983        }
984
985        Objects.requireNonNull(context);
986
987        return $nasgenmap$;
988    }
989
990    /**
991     * Constructor
992     *
993     * @param context the context
994     */
995    public Global(final Context context) {
996        super(checkAndGetMap(context));
997        this.context = context;
998        this.setIsScope();
999        this.lexicalScope = context.getEnv()._es6 ? new LexicalScope(this) : null;
1000    }
1001
1002    /**
1003     * Script access to "current" Global instance
1004     *
1005     * @return the global singleton
1006     */
1007    public static Global instance() {
1008        return Objects.requireNonNull(Context.getGlobal());
1009    }
1010
1011    private static Global instanceFrom(final Object self) {
1012        return self instanceof Global? (Global)self : instance();
1013    }
1014
1015    /**
1016     * Check if we have a Global instance
1017     * @return true if one exists
1018     */
1019    public static boolean hasInstance() {
1020        return Context.getGlobal() != null;
1021    }
1022
1023    /**
1024     * Script access to {@link ScriptEnvironment}
1025     *
1026     * @return the script environment
1027     */
1028    static ScriptEnvironment getEnv() {
1029        return instance().getContext().getEnv();
1030    }
1031
1032    /**
1033     * Script access to {@link Context}
1034     *
1035     * @return the context
1036     */
1037    static Context getThisContext() {
1038        return instance().getContext();
1039    }
1040
1041    // Runtime interface to Global
1042
1043    /**
1044     * Is there a class filter in the current Context?
1045     * @return class filter
1046     */
1047    public ClassFilter getClassFilter() {
1048        return context.getClassFilter();
1049    }
1050
1051    /**
1052     * Is this global of the given Context?
1053     * @param ctxt the context
1054     * @return true if this global belongs to the given Context
1055     */
1056    public boolean isOfContext(final Context ctxt) {
1057        return this.context == ctxt;
1058    }
1059
1060    /**
1061     * Does this global belong to a strict Context?
1062     * @return true if this global belongs to a strict Context
1063     */
1064    public boolean isStrictContext() {
1065        return context.getEnv()._strict;
1066    }
1067
1068    /**
1069     * Initialize standard builtin objects like "Object", "Array", "Function" etc.
1070     * as well as our extension builtin objects like "Java", "JSAdapter" as properties
1071     * of the global scope object.
1072     *
1073     * @param eng ScriptEngine to initialize
1074     * @param ctxt ScriptContext to initialize
1075     */
1076    public void initBuiltinObjects(final ScriptEngine eng, final ScriptContext ctxt) {
1077        if (this.builtinObject != null) {
1078            // already initialized, just return
1079            return;
1080        }
1081
1082        this.engine = eng;
1083        this.initscontext = ctxt;
1084        if (this.engine != null) {
1085            this.scontext = new ThreadLocal<>();
1086        }
1087        init(eng);
1088    }
1089
1090    /**
1091     * Wrap a Java object as corresponding script object
1092     *
1093     * @param obj object to wrap
1094     * @return    wrapped object
1095     */
1096    public Object wrapAsObject(final Object obj) {
1097        if (obj instanceof Boolean) {
1098            return new NativeBoolean((Boolean)obj, this);
1099        } else if (obj instanceof Number) {
1100            return new NativeNumber(((Number)obj).doubleValue(), this);
1101        } else if (isString(obj)) {
1102            return new NativeString((CharSequence)obj, this);
1103        } else if (obj instanceof Object[]) { // extension
1104            return new NativeArray(ArrayData.allocate((Object[])obj), this);
1105        } else if (obj instanceof double[]) { // extension
1106            return new NativeArray(ArrayData.allocate((double[])obj), this);
1107        } else if (obj instanceof long[]) {
1108            return new NativeArray(ArrayData.allocate((long[])obj), this);
1109        } else if (obj instanceof int[]) {
1110            return new NativeArray(ArrayData.allocate((int[]) obj), this);
1111        } else if (obj instanceof ArrayData) {
1112            return new NativeArray((ArrayData) obj, this);
1113        } else {
1114            // FIXME: more special cases? Map? List?
1115            return obj;
1116        }
1117    }
1118
1119    /**
1120     * Lookup helper for JS primitive types
1121     *
1122     * @param request the link request for the dynamic call site.
1123     * @param self     self reference
1124     *
1125     * @return guarded invocation
1126     */
1127    public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
1128        if (isString(self)) {
1129            return NativeString.lookupPrimitive(request, self);
1130        } else if (self instanceof Number) {
1131            return NativeNumber.lookupPrimitive(request, self);
1132        } else if (self instanceof Boolean) {
1133            return NativeBoolean.lookupPrimitive(request, self);
1134        }
1135        throw new IllegalArgumentException("Unsupported primitive: " + self);
1136    }
1137
1138    /**
1139     * Returns a method handle that creates a wrapper object for a JS primitive value.
1140     *
1141     * @param self receiver object
1142     * @return method handle to create wrapper objects for primitive receiver
1143     */
1144    public static MethodHandle getPrimitiveWrapFilter(final Object self) {
1145        if (isString(self)) {
1146            return NativeString.WRAPFILTER;
1147        } else if (self instanceof Number) {
1148            return NativeNumber.WRAPFILTER;
1149        } else if (self instanceof Boolean) {
1150            return NativeBoolean.WRAPFILTER;
1151        }
1152        throw new IllegalArgumentException("Unsupported primitive: " + self);
1153    }
1154
1155
1156    /**
1157     * Create a new empty script object
1158     *
1159     * @return the new ScriptObject
1160     */
1161    public ScriptObject newObject() {
1162        return useDualFields() ? new JD(getObjectPrototype()) : new JO(getObjectPrototype());
1163    }
1164
1165    /**
1166     * Default value of given type
1167     *
1168     * @param sobj     script object
1169     * @param typeHint type hint
1170     *
1171     * @return default value
1172     */
1173    public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
1174        // When the [[DefaultValue]] internal method of O is called with no hint,
1175        // then it behaves as if the hint were Number, unless O is a Date object
1176        // in which case it behaves as if the hint were String.
1177        Class<?> hint = typeHint;
1178        if (hint == null) {
1179            hint = Number.class;
1180        }
1181
1182        try {
1183            if (hint == String.class) {
1184
1185                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1186
1187                if (Bootstrap.isCallable(toString)) {
1188                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1189                    if (JSType.isPrimitive(value)) {
1190                        return value;
1191                    }
1192                }
1193
1194                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1195                if (Bootstrap.isCallable(valueOf)) {
1196                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1197                    if (JSType.isPrimitive(value)) {
1198                        return value;
1199                    }
1200                }
1201                throw typeError(this, "cannot.get.default.string");
1202            }
1203
1204            if (hint == Number.class) {
1205                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1206                if (Bootstrap.isCallable(valueOf)) {
1207                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1208                    if (JSType.isPrimitive(value)) {
1209                        return value;
1210                    }
1211                }
1212
1213                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1214                if (Bootstrap.isCallable(toString)) {
1215                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1216                    if (JSType.isPrimitive(value)) {
1217                        return value;
1218                    }
1219                }
1220
1221                throw typeError(this, "cannot.get.default.number");
1222            }
1223        } catch (final RuntimeException | Error e) {
1224            throw e;
1225        } catch (final Throwable t) {
1226            throw new RuntimeException(t);
1227        }
1228
1229        return UNDEFINED;
1230    }
1231
1232    /**
1233     * Is the given ScriptObject an ECMAScript Error object?
1234     *
1235     * @param sobj the object being checked
1236     * @return true if sobj is an Error object
1237     */
1238    public boolean isError(final ScriptObject sobj) {
1239        final ScriptObject errorProto = getErrorPrototype();
1240        ScriptObject proto = sobj.getProto();
1241        while (proto != null) {
1242            if (proto == errorProto) {
1243                return true;
1244            }
1245            proto = proto.getProto();
1246        }
1247        return false;
1248    }
1249
1250    /**
1251     * Create a new ECMAScript Error object.
1252     *
1253     * @param msg error message
1254     * @return newly created Error object
1255     */
1256    public ScriptObject newError(final String msg) {
1257        return new NativeError(msg, this);
1258    }
1259
1260    /**
1261     * Create a new ECMAScript EvalError object.
1262     *
1263     * @param msg error message
1264     * @return newly created EvalError object
1265     */
1266    public ScriptObject newEvalError(final String msg) {
1267        return new NativeEvalError(msg, this);
1268    }
1269
1270    /**
1271     * Create a new ECMAScript RangeError object.
1272     *
1273     * @param msg error message
1274     * @return newly created RangeError object
1275     */
1276    public ScriptObject newRangeError(final String msg) {
1277        return new NativeRangeError(msg, this);
1278    }
1279
1280    /**
1281     * Create a new ECMAScript ReferenceError object.
1282     *
1283     * @param msg error message
1284     * @return newly created ReferenceError object
1285     */
1286    public ScriptObject newReferenceError(final String msg) {
1287        return new NativeReferenceError(msg, this);
1288    }
1289
1290    /**
1291     * Create a new ECMAScript SyntaxError object.
1292     *
1293     * @param msg error message
1294     * @return newly created SyntaxError object
1295     */
1296    public ScriptObject newSyntaxError(final String msg) {
1297        return new NativeSyntaxError(msg, this);
1298    }
1299
1300    /**
1301     * Create a new ECMAScript TypeError object.
1302     *
1303     * @param msg error message
1304     * @return newly created TypeError object
1305     */
1306    public ScriptObject newTypeError(final String msg) {
1307        return new NativeTypeError(msg, this);
1308    }
1309
1310    /**
1311     * Create a new ECMAScript URIError object.
1312     *
1313     * @param msg error message
1314     * @return newly created URIError object
1315     */
1316    public ScriptObject newURIError(final String msg) {
1317        return new NativeURIError(msg, this);
1318    }
1319
1320    /**
1321     * Create a new ECMAScript GenericDescriptor object.
1322     *
1323     * @param configurable is the property configurable?
1324     * @param enumerable is the property enumerable?
1325     * @return newly created GenericDescriptor object
1326     */
1327    public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
1328        return new GenericPropertyDescriptor(configurable, enumerable, this);
1329    }
1330
1331    /**
1332     * Create a new ECMAScript DatePropertyDescriptor object.
1333     *
1334     * @param value of the data property
1335     * @param configurable is the property configurable?
1336     * @param enumerable is the property enumerable?
1337     * @param writable is the property writable?
1338     * @return newly created DataPropertyDescriptor object
1339     */
1340    public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
1341        return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
1342    }
1343
1344    /**
1345     * Create a new ECMAScript AccessorPropertyDescriptor object.
1346     *
1347     * @param get getter function of the user accessor property
1348     * @param set setter function of the user accessor property
1349     * @param configurable is the property configurable?
1350     * @param enumerable is the property enumerable?
1351     * @return newly created AccessorPropertyDescriptor object
1352     */
1353    public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
1354        final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
1355
1356        if (get == null) {
1357            desc.delete(PropertyDescriptor.GET, false);
1358        }
1359
1360        if (set == null) {
1361            desc.delete(PropertyDescriptor.SET, false);
1362        }
1363
1364        return desc;
1365    }
1366
1367    private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
1368        final T obj = map.get(key);
1369        if (obj != null) {
1370            return obj;
1371        }
1372
1373        try {
1374            final T newObj = creator.call();
1375            final T existingObj = map.putIfAbsent(key, newObj);
1376            return existingObj != null ? existingObj : newObj;
1377        } catch (final Exception exp) {
1378            throw new RuntimeException(exp);
1379        }
1380    }
1381
1382    private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
1383
1384
1385    /**
1386     * Get cached InvokeByName object for the given key
1387     * @param key key to be associated with InvokeByName object
1388     * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
1389     * @return InvokeByName object associated with the key.
1390     */
1391    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
1392        return getLazilyCreatedValue(key, creator, namedInvokers);
1393    }
1394
1395    private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
1396
1397    /**
1398     * Get cached dynamic method handle for the given key
1399     * @param key key to be associated with dynamic method handle
1400     * @param creator if method handle is absent 'creator' is called to make one (lazy init)
1401     * @return dynamic method handle associated with the key.
1402     */
1403    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
1404        return getLazilyCreatedValue(key, creator, dynamicInvokers);
1405    }
1406
1407    /**
1408     * Hook to search missing variables in ScriptContext if available
1409     * @param self used to detect if scope call or not (this function is 'strict')
1410     * @param name name of the variable missing
1411     * @return value of the missing variable or undefined (or TypeError for scope search)
1412     */
1413    public static Object __noSuchProperty__(final Object self, final Object name) {
1414        final Global global = Global.instance();
1415        final ScriptContext sctxt = global.currentContext();
1416        final String nameStr = name.toString();
1417
1418        if (sctxt != null) {
1419            final int scope = sctxt.getAttributesScope(nameStr);
1420            if (scope != -1) {
1421                return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
1422            }
1423        }
1424
1425        switch (nameStr) {
1426        case "context":
1427            return sctxt;
1428        case "engine":
1429            return global.engine;
1430        default:
1431            break;
1432        }
1433
1434        if (self == UNDEFINED) {
1435            // scope access and so throw ReferenceError
1436            throw referenceError(global, "not.defined", nameStr);
1437        }
1438
1439        return UNDEFINED;
1440    }
1441
1442    /**
1443     * This is the eval used when 'indirect' eval call is made.
1444     *
1445     * var global = this;
1446     * global.eval("print('hello')");
1447     *
1448     * @param self  eval scope
1449     * @param str   eval string
1450     *
1451     * @return the result of eval
1452     */
1453    public static Object eval(final Object self, final Object str) {
1454        return directEval(self, str, Global.instanceFrom(self), UNDEFINED, false);
1455    }
1456
1457    /**
1458     * Direct eval
1459     *
1460     * @param self     The scope of eval passed as 'self'
1461     * @param str      Evaluated code
1462     * @param callThis "this" to be passed to the evaluated code
1463     * @param location location of the eval call
1464     * @param strict   is eval called from a strict mode code?
1465     *
1466     * @return the return value of the eval
1467     *
1468     * This is directly invoked from generated when eval(code) is called in user code
1469     */
1470    public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
1471        if (!isString(str)) {
1472            return str;
1473        }
1474        final Global global = Global.instanceFrom(self);
1475        final ScriptObject scope = self instanceof ScriptObject && ((ScriptObject)self).isScope() ? (ScriptObject)self : global;
1476
1477        return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
1478    }
1479
1480    /**
1481     * Global print implementation - Nashorn extension
1482     *
1483     * @param self    scope
1484     * @param objects arguments to print
1485     *
1486     * @return result of print (undefined)
1487     */
1488    public static Object print(final Object self, final Object... objects) {
1489        return Global.instanceFrom(self).printImpl(false, objects);
1490    }
1491
1492    /**
1493     * Global println implementation - Nashorn extension
1494     *
1495     * @param self    scope
1496     * @param objects arguments to print
1497     *
1498     * @return result of println (undefined)
1499     */
1500    public static Object println(final Object self, final Object... objects) {
1501        return Global.instanceFrom(self).printImpl(true, objects);
1502    }
1503
1504    /**
1505     * Global load implementation - Nashorn extension.
1506     *
1507     * <p>
1508     * load builtin loads the given script. Script source can be a URL or a File
1509     * or a script object with name and script properties. Evaluated code gets
1510     * global object "this" and uses global object as scope for evaluation.
1511     * </p>
1512     * <p>
1513     * If self is undefined or null or global, then global object is used
1514     * as scope as well as "this" for the evaluated code. If self is any other
1515     * object, then it is indirect load call. With indirect load call, the
1516     * properties of scope are available to evaluated script as variables. Also,
1517     * global scope properties are accessible. Any var, function definition in
1518     * evaluated script goes into an object that is not accessible to user scripts.
1519     * </p>
1520     * Thus the indirect load call is equivalent to the following:
1521     * <pre>
1522     * <code>
1523     * (function (scope, source) {
1524     *    with(scope) {
1525     *        eval(&lt;script_from_source&gt;);
1526     *    }
1527     * })(self, source);
1528     * </code>
1529     * </pre>
1530     *
1531     * @param self    scope to use for the script evaluation
1532     * @param source  script source
1533     *
1534     * @return result of load (may be undefined)
1535     *
1536     * @throws IOException if source could not be read
1537     */
1538    public static Object load(final Object self, final Object source) throws IOException {
1539        final Global global = Global.instanceFrom(self);
1540        return global.getContext().load(self, source);
1541    }
1542
1543    /**
1544     * Global loadWithNewGlobal implementation - Nashorn extension.
1545     *
1546     * loadWithNewGlobal builtin loads the given script from a URL or a File
1547     * or a script object with name and script properties. Evaluated code gets
1548     * new global object "this" and uses that new global object as scope for evaluation.
1549     *
1550     * @param self self This value is ignored by this function
1551     * @param args optional arguments to be passed to the loaded script
1552     *
1553     * @return result of load (may be undefined)
1554     *
1555     * @throws IOException if source could not be read
1556     */
1557    public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
1558        final Global global = Global.instanceFrom(self);
1559        final int length = args.length;
1560        final boolean hasArgs = 0 < length;
1561        final Object from = hasArgs ? args[0] : UNDEFINED;
1562        final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
1563
1564        return global.getContext().loadWithNewGlobal(from, arguments);
1565    }
1566
1567    /**
1568     * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
1569     *
1570     * @param self  self reference
1571     * @param code  exit code
1572     *
1573     * @return undefined (will never be reached)
1574     */
1575    public static Object exit(final Object self, final Object code) {
1576        System.exit(JSType.toInt32(code));
1577        return UNDEFINED;
1578    }
1579
1580    // builtin prototype accessors
1581
1582    /**
1583     * Get the builtin Object prototype.
1584     * @return the object prototype.
1585     */
1586    public ScriptObject getObjectPrototype() {
1587        return ScriptFunction.getPrototype(builtinObject);
1588    }
1589
1590    ScriptObject getFunctionPrototype() {
1591        return ScriptFunction.getPrototype(builtinFunction);
1592    }
1593
1594    ScriptObject getArrayPrototype() {
1595        return ScriptFunction.getPrototype(builtinArray);
1596    }
1597
1598    ScriptObject getBooleanPrototype() {
1599        return ScriptFunction.getPrototype(builtinBoolean);
1600    }
1601
1602    ScriptObject getNumberPrototype() {
1603        return ScriptFunction.getPrototype(builtinNumber);
1604    }
1605
1606    ScriptObject getDatePrototype() {
1607        return ScriptFunction.getPrototype(getBuiltinDate());
1608    }
1609
1610    ScriptObject getRegExpPrototype() {
1611        return ScriptFunction.getPrototype(getBuiltinRegExp());
1612    }
1613
1614    ScriptObject getStringPrototype() {
1615        return ScriptFunction.getPrototype(builtinString);
1616    }
1617
1618    ScriptObject getErrorPrototype() {
1619        return ScriptFunction.getPrototype(builtinError);
1620    }
1621
1622    ScriptObject getEvalErrorPrototype() {
1623        return ScriptFunction.getPrototype(getBuiltinEvalError());
1624    }
1625
1626    ScriptObject getRangeErrorPrototype() {
1627        return ScriptFunction.getPrototype(getBuiltinRangeError());
1628    }
1629
1630    ScriptObject getReferenceErrorPrototype() {
1631        return ScriptFunction.getPrototype(builtinReferenceError);
1632    }
1633
1634    ScriptObject getSyntaxErrorPrototype() {
1635        return ScriptFunction.getPrototype(builtinSyntaxError);
1636    }
1637
1638    ScriptObject getTypeErrorPrototype() {
1639        return ScriptFunction.getPrototype(builtinTypeError);
1640    }
1641
1642    ScriptObject getURIErrorPrototype() {
1643        return ScriptFunction.getPrototype(getBuiltinURIError());
1644    }
1645
1646    ScriptObject getJavaImporterPrototype() {
1647        return ScriptFunction.getPrototype(getBuiltinJavaImporter());
1648    }
1649
1650    ScriptObject getJSAdapterPrototype() {
1651        return ScriptFunction.getPrototype(getBuiltinJSAdapter());
1652    }
1653
1654    private synchronized ScriptFunction getBuiltinArrayBuffer() {
1655        if (this.builtinArrayBuffer == null) {
1656            this.builtinArrayBuffer = initConstructorAndSwitchPoint("ArrayBuffer", ScriptFunction.class);
1657        }
1658        return this.builtinArrayBuffer;
1659    }
1660
1661    ScriptObject getArrayBufferPrototype() {
1662        return ScriptFunction.getPrototype(getBuiltinArrayBuffer());
1663    }
1664
1665    private synchronized ScriptFunction getBuiltinDataView() {
1666        if (this.builtinDataView == null) {
1667            this.builtinDataView = initConstructorAndSwitchPoint("DataView", ScriptFunction.class);
1668        }
1669        return this.builtinDataView;
1670    }
1671
1672    ScriptObject getDataViewPrototype() {
1673        return ScriptFunction.getPrototype(getBuiltinDataView());
1674    }
1675
1676    private synchronized ScriptFunction getBuiltinInt8Array() {
1677        if (this.builtinInt8Array == null) {
1678            this.builtinInt8Array = initConstructorAndSwitchPoint("Int8Array", ScriptFunction.class);
1679        }
1680        return this.builtinInt8Array;
1681    }
1682
1683    ScriptObject getInt8ArrayPrototype() {
1684        return ScriptFunction.getPrototype(getBuiltinInt8Array());
1685    }
1686
1687    private synchronized ScriptFunction getBuiltinUint8Array() {
1688        if (this.builtinUint8Array == null) {
1689            this.builtinUint8Array = initConstructorAndSwitchPoint("Uint8Array", ScriptFunction.class);
1690        }
1691        return this.builtinUint8Array;
1692    }
1693
1694    ScriptObject getUint8ArrayPrototype() {
1695        return ScriptFunction.getPrototype(getBuiltinUint8Array());
1696    }
1697
1698    private synchronized ScriptFunction getBuiltinUint8ClampedArray() {
1699        if (this.builtinUint8ClampedArray == null) {
1700            this.builtinUint8ClampedArray = initConstructorAndSwitchPoint("Uint8ClampedArray", ScriptFunction.class);
1701        }
1702        return this.builtinUint8ClampedArray;
1703    }
1704
1705    ScriptObject getUint8ClampedArrayPrototype() {
1706        return ScriptFunction.getPrototype(getBuiltinUint8ClampedArray());
1707    }
1708
1709    private synchronized ScriptFunction getBuiltinInt16Array() {
1710        if (this.builtinInt16Array == null) {
1711            this.builtinInt16Array = initConstructorAndSwitchPoint("Int16Array", ScriptFunction.class);
1712        }
1713        return this.builtinInt16Array;
1714    }
1715
1716    ScriptObject getInt16ArrayPrototype() {
1717        return ScriptFunction.getPrototype(getBuiltinInt16Array());
1718    }
1719
1720    private synchronized ScriptFunction getBuiltinUint16Array() {
1721        if (this.builtinUint16Array == null) {
1722            this.builtinUint16Array = initConstructorAndSwitchPoint("Uint16Array", ScriptFunction.class);
1723        }
1724        return this.builtinUint16Array;
1725    }
1726
1727    ScriptObject getUint16ArrayPrototype() {
1728        return ScriptFunction.getPrototype(getBuiltinUint16Array());
1729    }
1730
1731    private synchronized ScriptFunction getBuiltinInt32Array() {
1732        if (this.builtinInt32Array == null) {
1733            this.builtinInt32Array = initConstructorAndSwitchPoint("Int32Array", ScriptFunction.class);
1734        }
1735        return this.builtinInt32Array;
1736    }
1737
1738    ScriptObject getInt32ArrayPrototype() {
1739        return ScriptFunction.getPrototype(getBuiltinInt32Array());
1740    }
1741
1742    private synchronized ScriptFunction getBuiltinUint32Array() {
1743        if (this.builtinUint32Array == null) {
1744            this.builtinUint32Array = initConstructorAndSwitchPoint("Uint32Array", ScriptFunction.class);
1745        }
1746        return this.builtinUint32Array;
1747    }
1748
1749    ScriptObject getUint32ArrayPrototype() {
1750        return ScriptFunction.getPrototype(getBuiltinUint32Array());
1751    }
1752
1753    private synchronized ScriptFunction getBuiltinFloat32Array() {
1754        if (this.builtinFloat32Array == null) {
1755            this.builtinFloat32Array = initConstructorAndSwitchPoint("Float32Array", ScriptFunction.class);
1756        }
1757        return this.builtinFloat32Array;
1758    }
1759
1760    ScriptObject getFloat32ArrayPrototype() {
1761        return ScriptFunction.getPrototype(getBuiltinFloat32Array());
1762    }
1763
1764    private synchronized ScriptFunction getBuiltinFloat64Array() {
1765        if (this.builtinFloat64Array == null) {
1766            this.builtinFloat64Array = initConstructorAndSwitchPoint("Float64Array", ScriptFunction.class);
1767        }
1768        return this.builtinFloat64Array;
1769    }
1770
1771    ScriptObject getFloat64ArrayPrototype() {
1772        return ScriptFunction.getPrototype(getBuiltinFloat64Array());
1773    }
1774
1775    private ScriptFunction getBuiltinArray() {
1776        return builtinArray;
1777    }
1778
1779    ScriptFunction getTypeErrorThrower() {
1780        return typeErrorThrower;
1781    }
1782
1783    /**
1784     * Called from compiled script code to test if builtin has been overridden
1785     *
1786     * @return true if builtin array has not been overridden
1787     */
1788    public static boolean isBuiltinArray() {
1789        final Global instance = Global.instance();
1790        return instance.array == instance.getBuiltinArray();
1791    }
1792
1793    private ScriptFunction getBuiltinBoolean() {
1794        return builtinBoolean;
1795    }
1796
1797    /**
1798     * Called from compiled script code to test if builtin has been overridden
1799     *
1800     * @return true if builtin boolean has not been overridden
1801     */
1802    public static boolean isBuiltinBoolean() {
1803        final Global instance = Global.instance();
1804        return instance._boolean == instance.getBuiltinBoolean();
1805    }
1806
1807    private synchronized ScriptFunction getBuiltinDate() {
1808        if (this.builtinDate == null) {
1809            this.builtinDate = initConstructorAndSwitchPoint("Date", ScriptFunction.class);
1810            final ScriptObject dateProto = ScriptFunction.getPrototype(builtinDate);
1811            // initialize default date
1812            this.DEFAULT_DATE = new NativeDate(NaN, dateProto);
1813        }
1814        return this.builtinDate;
1815    }
1816
1817    /**
1818     * Called from compiled script code to test if builtin has been overridden
1819     *
1820     * @return true if builtin date has not been overridden
1821     */
1822    public static boolean isBuiltinDate() {
1823        final Global instance = Global.instance();
1824        return instance.date == LAZY_SENTINEL || instance.date == instance.getBuiltinDate();
1825    }
1826
1827    private ScriptFunction getBuiltinError() {
1828        return builtinError;
1829    }
1830
1831    /**
1832     * Called from compiled script code to test if builtin has been overridden
1833     *
1834     * @return true if builtin error has not been overridden
1835     */
1836    public static boolean isBuiltinError() {
1837        final Global instance = Global.instance();
1838        return instance.error == instance.getBuiltinError();
1839    }
1840
1841    private synchronized ScriptFunction getBuiltinEvalError() {
1842        if (this.builtinEvalError == null) {
1843            this.builtinEvalError = initErrorSubtype("EvalError", getErrorPrototype());
1844        }
1845        return this.builtinEvalError;
1846    }
1847
1848    /**
1849     * Called from compiled script code to test if builtin has been overridden
1850     *
1851     * @return true if builtin eval error has not been overridden
1852     */
1853    public static boolean isBuiltinEvalError() {
1854        final Global instance = Global.instance();
1855        return instance.evalError == LAZY_SENTINEL || instance.evalError == instance.getBuiltinEvalError();
1856    }
1857
1858    private ScriptFunction getBuiltinFunction() {
1859        return builtinFunction;
1860    }
1861
1862    /**
1863     * Called from compiled script code to test if builtin has been overridden
1864     *
1865     * @return true if builtin function has not been overridden
1866     */
1867    public static boolean isBuiltinFunction() {
1868        final Global instance = Global.instance();
1869        return instance.function == instance.getBuiltinFunction();
1870    }
1871
1872    /**
1873     * Get the switchpoint used to check property changes for Function.prototype.apply
1874     * @return the switchpoint guarding apply (same as guarding call, and everything else in function)
1875     */
1876    public static SwitchPoint getBuiltinFunctionApplySwitchPoint() {
1877        return ScriptFunction.getPrototype(Global.instance().getBuiltinFunction()).getProperty("apply").getBuiltinSwitchPoint();
1878    }
1879
1880    private static boolean isBuiltinFunctionProperty(final String name) {
1881        final Global instance = Global.instance();
1882        final ScriptFunction builtinFunction = instance.getBuiltinFunction();
1883        if (builtinFunction == null) {
1884            return false; //conservative for compile-only mode
1885        }
1886        final boolean isBuiltinFunction = instance.function == builtinFunction;
1887        return isBuiltinFunction && ScriptFunction.getPrototype(builtinFunction).getProperty(name).isBuiltin();
1888    }
1889
1890    /**
1891     * Check if the Function.prototype.apply has not been replaced
1892     * @return true if Function.prototype.apply has been replaced
1893     */
1894    public static boolean isBuiltinFunctionPrototypeApply() {
1895        return isBuiltinFunctionProperty("apply");
1896    }
1897
1898    /**
1899     * Check if the Function.prototype.apply has not been replaced
1900     * @return true if Function.prototype.call has been replaced
1901     */
1902    public static boolean isBuiltinFunctionPrototypeCall() {
1903        return isBuiltinFunctionProperty("call");
1904    }
1905
1906    private synchronized ScriptFunction getBuiltinJSAdapter() {
1907        if (this.builtinJSAdapter == null) {
1908            this.builtinJSAdapter = initConstructorAndSwitchPoint("JSAdapter", ScriptFunction.class);
1909        }
1910        return builtinJSAdapter;
1911    }
1912
1913    /**
1914     * Called from compiled script code to test if builtin has been overridden
1915     *
1916     * @return true if builtin JSAdapter has not been overridden
1917     */
1918    public static boolean isBuiltinJSAdapter() {
1919        final Global instance = Global.instance();
1920        return instance.jsadapter == LAZY_SENTINEL || instance.jsadapter == instance.getBuiltinJSAdapter();
1921    }
1922
1923    private synchronized ScriptObject getBuiltinJSON() {
1924        if (this.builtinJSON == null) {
1925            this.builtinJSON = initConstructorAndSwitchPoint("JSON", ScriptObject.class);
1926        }
1927        return this.builtinJSON;
1928    }
1929
1930    /**
1931     * Called from compiled script code to test if builtin has been overridden
1932     *
1933     * @return true if builtin JSON has has not been overridden
1934     */
1935    public static boolean isBuiltinJSON() {
1936        final Global instance = Global.instance();
1937        return instance.json == LAZY_SENTINEL || instance.json == instance.getBuiltinJSON();
1938    }
1939
1940    private ScriptObject getBuiltinJava() {
1941        return builtinJava;
1942    }
1943
1944    /**
1945     * Called from compiled script code to test if builtin has been overridden
1946     *
1947     * @return true if builtin Java has not been overridden
1948     */
1949    public static boolean isBuiltinJava() {
1950        final Global instance = Global.instance();
1951        return instance.java == instance.getBuiltinJava();
1952    }
1953
1954    private ScriptObject getBuiltinJavax() {
1955        return builtinJavax;
1956    }
1957
1958    /**
1959     * Called from compiled script code to test if builtin has been overridden
1960     *
1961     * @return true if builtin Javax has not been overridden
1962     */
1963    public static boolean isBuiltinJavax() {
1964        final Global instance = Global.instance();
1965        return instance.javax == instance.getBuiltinJavax();
1966    }
1967
1968    private synchronized ScriptFunction getBuiltinJavaImporter() {
1969        if (this.builtinJavaImporter == null) {
1970            this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
1971        }
1972        return this.builtinJavaImporter;
1973    }
1974
1975    private synchronized ScriptObject getBuiltinJavaApi() {
1976        if (this.builtinJavaApi == null) {
1977            this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
1978        }
1979        return this.builtinJavaApi;
1980    }
1981
1982    /**
1983     * Called from compiled script code to test if builtin has been overridden
1984     *
1985     * @return true if builtin Java importer has not been overridden
1986     */
1987    public static boolean isBuiltinJavaImporter() {
1988        final Global instance = Global.instance();
1989        return instance.javaImporter == LAZY_SENTINEL || instance.javaImporter == instance.getBuiltinJavaImporter();
1990    }
1991
1992    /**
1993     * Called from compiled script code to test if builtin has been overridden
1994     *
1995     * @return true if builtin math has not been overridden
1996     */
1997    public static boolean isBuiltinMath() {
1998        final Global instance = Global.instance();
1999        return instance.math == instance.builtinMath;
2000    }
2001
2002    private ScriptFunction getBuiltinNumber() {
2003        return builtinNumber;
2004    }
2005
2006    /**
2007     * Called from compiled script code to test if builtin has been overridden
2008     *
2009     * @return true if builtin number has not been overridden
2010     */
2011    public static boolean isBuiltinNumber() {
2012        final Global instance = Global.instance();
2013        return instance.number == instance.getBuiltinNumber();
2014    }
2015
2016    private ScriptFunction getBuiltinObject() {
2017        return builtinObject;
2018    }
2019
2020    /**
2021     * Called from compiled script code to test if builtin has been overridden
2022     *
2023     * @return true if builtin object has not been overridden
2024     */
2025    public static boolean isBuiltinObject() {
2026        final Global instance = Global.instance();
2027        return instance.object == instance.getBuiltinObject();
2028    }
2029
2030    private ScriptObject getBuiltinPackages() {
2031        return builtinPackages;
2032    }
2033
2034    /**
2035     * Called from compiled script code to test if builtin has been overridden
2036     *
2037     * @return true if builtin package has not been overridden
2038     */
2039    public static boolean isBuiltinPackages() {
2040        final Global instance = Global.instance();
2041        return instance.packages == instance.getBuiltinPackages();
2042    }
2043
2044    private synchronized ScriptFunction getBuiltinRangeError() {
2045        if (this.builtinRangeError == null) {
2046            this.builtinRangeError = initErrorSubtype("RangeError", getErrorPrototype());
2047        }
2048        return builtinRangeError;
2049    }
2050
2051    /**
2052     * Called from compiled script code to test if builtin has been overridden
2053     *
2054     * @return true if builtin range error has not been overridden
2055     */
2056    public static boolean isBuiltinRangeError() {
2057        final Global instance = Global.instance();
2058        return instance.rangeError == LAZY_SENTINEL || instance.rangeError == instance.getBuiltinRangeError();
2059    }
2060
2061    private synchronized ScriptFunction getBuiltinReferenceError() {
2062        return builtinReferenceError;
2063    }
2064
2065    /**
2066     * Called from compiled script code to test if builtin has been overridden
2067     *
2068     * @return true if builtin reference error has not been overridden
2069     */
2070    public static boolean isBuiltinReferenceError() {
2071        final Global instance = Global.instance();
2072        return instance.referenceError == instance.getBuiltinReferenceError();
2073    }
2074
2075    private synchronized ScriptFunction getBuiltinRegExp() {
2076        if (this.builtinRegExp == null) {
2077            this.builtinRegExp = initConstructorAndSwitchPoint("RegExp", ScriptFunction.class);
2078            final ScriptObject regExpProto = ScriptFunction.getPrototype(builtinRegExp);
2079            // initialize default regexp object
2080            this.DEFAULT_REGEXP = new NativeRegExp("(?:)", "", this, regExpProto);
2081            // RegExp.prototype should behave like a RegExp object. So copy the
2082            // properties.
2083            regExpProto.addBoundProperties(DEFAULT_REGEXP);
2084        }
2085        return builtinRegExp;
2086    }
2087
2088    /**
2089     * Called from compiled script code to test if builtin has been overridden
2090     *
2091     * @return true if builtin regexp has not been overridden
2092     */
2093    public static boolean isBuiltinRegExp() {
2094        final Global instance = Global.instance();
2095        return instance.regexp == LAZY_SENTINEL || instance.regexp == instance.getBuiltinRegExp();
2096    }
2097
2098    private ScriptFunction getBuiltinString() {
2099        return builtinString;
2100    }
2101
2102    /**
2103     * Called from compiled script code to test if builtin has been overridden
2104     *
2105     * @return true if builtin Java has not been overridden
2106     */
2107    public static boolean isBuiltinString() {
2108        final Global instance = Global.instance();
2109        return instance.string == instance.getBuiltinString();
2110    }
2111
2112    private ScriptFunction getBuiltinSyntaxError() {
2113        return builtinSyntaxError;
2114    }
2115
2116    /**
2117     * Called from compiled script code to test if builtin has been overridden
2118     *
2119     * @return true if builtin syntax error has not been overridden
2120     */
2121    public static boolean isBuiltinSyntaxError() {
2122        final Global instance = Global.instance();
2123        return instance.syntaxError == instance.getBuiltinSyntaxError();
2124    }
2125
2126    private ScriptFunction getBuiltinTypeError() {
2127        return builtinTypeError;
2128    }
2129
2130    /**
2131     * Called from compiled script code to test if builtin has been overridden
2132     *
2133     * @return true if builtin type error has not been overridden
2134     */
2135    public static boolean isBuiltinTypeError() {
2136        final Global instance = Global.instance();
2137        return instance.typeError == instance.getBuiltinTypeError();
2138    }
2139
2140    private synchronized ScriptFunction getBuiltinURIError() {
2141        if (this.builtinURIError == null) {
2142            this.builtinURIError = initErrorSubtype("URIError", getErrorPrototype());
2143        }
2144        return this.builtinURIError;
2145    }
2146
2147    /**
2148     * Called from compiled script code to test if builtin has been overridden
2149     *
2150     * @return true if builtin URI error has not been overridden
2151     */
2152    public static boolean isBuiltinURIError() {
2153        final Global instance = Global.instance();
2154        return instance.uriError == LAZY_SENTINEL || instance.uriError == instance.getBuiltinURIError();
2155    }
2156
2157    @Override
2158    public String getClassName() {
2159        return "global";
2160    }
2161
2162    /**
2163     * Copy function used to clone NativeRegExp objects.
2164     *
2165     * @param regexp a NativeRegExp to clone
2166     *
2167     * @return copy of the given regexp object
2168     */
2169    public static Object regExpCopy(final Object regexp) {
2170        return new NativeRegExp((NativeRegExp)regexp);
2171    }
2172
2173    /**
2174     * Convert given object to NativeRegExp type.
2175     *
2176     * @param obj object to be converted
2177     * @return NativeRegExp instance
2178     */
2179    public static NativeRegExp toRegExp(final Object obj) {
2180        if (obj instanceof NativeRegExp) {
2181            return (NativeRegExp)obj;
2182        }
2183        return new NativeRegExp(JSType.toString(obj));
2184    }
2185
2186    /**
2187     * ECMA 9.9 ToObject implementation
2188     *
2189     * @param obj  an item for which to run ToObject
2190     * @return ToObject version of given item
2191     */
2192    public static Object toObject(final Object obj) {
2193        if (obj == null || obj == UNDEFINED) {
2194            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2195        }
2196
2197        if (obj instanceof ScriptObject) {
2198            return obj;
2199        }
2200
2201        return instance().wrapAsObject(obj);
2202    }
2203
2204    /**
2205     * Allocate a new object array.
2206     *
2207     * @param initial object values.
2208     * @return the new array
2209     */
2210    public static NativeArray allocate(final Object[] initial) {
2211        ArrayData arrayData = ArrayData.allocate(initial);
2212
2213        for (int index = 0; index < initial.length; index++) {
2214            final Object value = initial[index];
2215
2216            if (value == ScriptRuntime.EMPTY) {
2217                arrayData = arrayData.delete(index);
2218            }
2219        }
2220
2221        return new NativeArray(arrayData);
2222    }
2223
2224    /**
2225     * Allocate a new number array.
2226     *
2227     * @param initial number values.
2228     * @return the new array
2229     */
2230    public static NativeArray allocate(final double[] initial) {
2231        return new NativeArray(ArrayData.allocate(initial));
2232    }
2233
2234    /**
2235     * Allocate a new long array.
2236     *
2237     * @param initial number values.
2238     * @return the new array
2239     */
2240    public static NativeArray allocate(final long[] initial) {
2241        return new NativeArray(ArrayData.allocate(initial));
2242    }
2243
2244    /**
2245     * Allocate a new integer array.
2246     *
2247     * @param initial number values.
2248     * @return the new array
2249     */
2250    public static NativeArray allocate(final int[] initial) {
2251        return new NativeArray(ArrayData.allocate(initial));
2252    }
2253
2254    /**
2255     * Allocate a new object array for arguments.
2256     *
2257     * @param arguments initial arguments passed.
2258     * @param callee reference to the function that uses arguments object
2259     * @param numParams actual number of declared parameters
2260     *
2261     * @return the new array
2262     */
2263    public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
2264        return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
2265    }
2266
2267    /**
2268     * Called from generated to check if given function is the builtin 'eval'. If
2269     * eval is used in a script, a lot of optimizations and assumptions cannot be done.
2270     *
2271     * @param  fn function object that is checked
2272     * @return true if fn is the builtin eval
2273     */
2274    public static boolean isEval(final Object fn) {
2275        return fn == Global.instance().builtinEval;
2276    }
2277
2278    /**
2279     * Called from generated to replace a location property placeholder with the actual location property value.
2280     *
2281     * @param  placeholder the value tested for being a placeholder for a location property
2282     * @param  locationProperty the actual value for the location property
2283     * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
2284     */
2285    public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
2286        return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
2287    }
2288
2289    /**
2290     * Called from runtime internals to check if the passed value is a location property placeholder.
2291     * @param  placeholder the value tested for being a placeholder for a location property
2292     * @return true if the value is a placeholder, false otherwise.
2293     */
2294    public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
2295        return placeholder == LOCATION_PROPERTY_PLACEHOLDER;
2296    }
2297
2298    /**
2299     * Create a new RegExp object.
2300     *
2301     * @param expression Regular expression.
2302     * @param options    Search options.
2303     *
2304     * @return New RegExp object.
2305     */
2306    public static Object newRegExp(final String expression, final String options) {
2307        if (options == null) {
2308            return new NativeRegExp(expression);
2309        }
2310        return new NativeRegExp(expression, options);
2311    }
2312
2313    /**
2314     * Get the object prototype
2315     *
2316     * @return the object prototype
2317     */
2318    public static ScriptObject objectPrototype() {
2319        return Global.instance().getObjectPrototype();
2320    }
2321
2322    /**
2323     * Create a new empty object instance.
2324     *
2325     * @return New empty object.
2326     */
2327    public static ScriptObject newEmptyInstance() {
2328        return Global.instance().newObject();
2329    }
2330
2331    /**
2332     * Check if a given object is a ScriptObject, raises an exception if this is
2333     * not the case
2334     *
2335     * @param obj and object to check
2336     * @return the script object
2337     */
2338    public static ScriptObject checkObject(final Object obj) {
2339        if (!(obj instanceof ScriptObject)) {
2340            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2341        }
2342        return (ScriptObject)obj;
2343    }
2344
2345    /**
2346     * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
2347     * if this object is null or undefined.
2348     *
2349     * @param obj an object to check
2350     */
2351    public static void checkObjectCoercible(final Object obj) {
2352        if (obj == null || obj == UNDEFINED) {
2353            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2354        }
2355    }
2356
2357    /**
2358     * Get the current split state.
2359     *
2360     * @return current split state
2361     */
2362    @Override
2363    public int getSplitState() {
2364        return splitState;
2365    }
2366
2367    /**
2368     * Set the current split state.
2369     *
2370     * @param state current split state
2371     */
2372    @Override
2373    public void setSplitState(final int state) {
2374        splitState = state;
2375    }
2376
2377    /**
2378     * Return the ES6 global scope for lexically declared bindings.
2379     * @return the ES6 lexical global scope.
2380     */
2381    public final ScriptObject getLexicalScope() {
2382        assert context.getEnv()._es6;
2383        return lexicalScope;
2384    }
2385
2386    @Override
2387    public void addBoundProperties(final ScriptObject source, final jdk.nashorn.internal.runtime.Property[] properties) {
2388        PropertyMap ownMap = getMap();
2389        LexicalScope lexScope = null;
2390        PropertyMap lexicalMap = null;
2391        boolean hasLexicalDefinitions = false;
2392
2393        if (context.getEnv()._es6) {
2394            lexScope = (LexicalScope) getLexicalScope();
2395            lexicalMap = lexScope.getMap();
2396
2397            for (final jdk.nashorn.internal.runtime.Property property : properties) {
2398                if (property.isLexicalBinding()) {
2399                    hasLexicalDefinitions = true;
2400                }
2401                // ES6 15.1.8 steps 6. and 7.
2402                final jdk.nashorn.internal.runtime.Property globalProperty = ownMap.findProperty(property.getKey());
2403                if (globalProperty != null && !globalProperty.isConfigurable() && property.isLexicalBinding()) {
2404                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2405                }
2406                final jdk.nashorn.internal.runtime.Property lexicalProperty = lexicalMap.findProperty(property.getKey());
2407                if (lexicalProperty != null && !property.isConfigurable()) {
2408                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2409                }
2410            }
2411        }
2412
2413        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2414            if (property.isLexicalBinding()) {
2415                assert lexScope != null;
2416                lexicalMap = lexScope.addBoundProperty(lexicalMap, source, property);
2417
2418                if (ownMap.findProperty(property.getKey()) != null) {
2419                    // If property exists in the global object invalidate any global constant call sites.
2420                    invalidateGlobalConstant(property.getKey());
2421                }
2422            } else {
2423                ownMap = addBoundProperty(ownMap, source, property);
2424            }
2425        }
2426
2427        setMap(ownMap);
2428
2429        if (hasLexicalDefinitions) {
2430            assert lexScope != null;
2431            lexScope.setMap(lexicalMap);
2432            invalidateLexicalSwitchPoint();
2433        }
2434    }
2435
2436    @Override
2437    public GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2438        final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2439        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2440
2441        if (lexicalScope != null && isScope && !NashornCallSiteDescriptor.isApplyToCall(desc)) {
2442            if (lexicalScope.hasOwnProperty(name)) {
2443                return lexicalScope.findGetMethod(desc, request, operator);
2444            }
2445        }
2446
2447        final GuardedInvocation invocation =  super.findGetMethod(desc, request, operator);
2448
2449        // We want to avoid adding our generic lexical scope switchpoint to global constant invocations,
2450        // because those are invalidated per-key in the addBoundProperties method above.
2451        // We therefor check if the invocation does already have a switchpoint and the property is non-inherited,
2452        // assuming this only applies to global constants. If other non-inherited properties will
2453        // start using switchpoints some time in the future we'll have to revisit this.
2454        if (isScope && context.getEnv()._es6 && (invocation.getSwitchPoints() == null || !hasOwnProperty(name))) {
2455            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2456        }
2457
2458        return invocation;
2459    }
2460
2461    @Override
2462    protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) {
2463        if (lexicalScope != null && start != this && start.isScope()) {
2464            final FindProperty find = lexicalScope.findProperty(key, false);
2465            if (find != null) {
2466                return find;
2467            }
2468        }
2469        return super.findProperty(key, deep, start);
2470    }
2471
2472    @Override
2473    public GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2474        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2475
2476        if (lexicalScope != null && isScope) {
2477            final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2478            if (lexicalScope.hasOwnProperty(name)) {
2479                return lexicalScope.findSetMethod(desc, request);
2480            }
2481        }
2482
2483        final GuardedInvocation invocation = super.findSetMethod(desc, request);
2484
2485        if (isScope && context.getEnv()._es6) {
2486            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2487        }
2488
2489        return invocation;
2490    }
2491
2492    /**
2493     * Adds jjs shell interactive mode builtin functions to global scope.
2494     */
2495    public void addShellBuiltins() {
2496        Object value = ScriptFunctionImpl.makeFunction("input", ShellFunctions.INPUT);
2497        addOwnProperty("input", Attribute.NOT_ENUMERABLE, value);
2498
2499        value = ScriptFunctionImpl.makeFunction("evalinput", ShellFunctions.EVALINPUT);
2500        addOwnProperty("evalinput", Attribute.NOT_ENUMERABLE, value);
2501    }
2502
2503    private synchronized SwitchPoint getLexicalScopeSwitchPoint() {
2504        SwitchPoint switchPoint = lexicalScopeSwitchPoint;
2505        if (switchPoint == null || switchPoint.hasBeenInvalidated()) {
2506            switchPoint = lexicalScopeSwitchPoint = new SwitchPoint();
2507        }
2508        return switchPoint;
2509    }
2510
2511    private synchronized void invalidateLexicalSwitchPoint() {
2512        if (lexicalScopeSwitchPoint != null) {
2513            context.getLogger(GlobalConstants.class).info("Invalidating non-constant globals on lexical scope update");
2514            SwitchPoint.invalidateAll(new SwitchPoint[]{ lexicalScopeSwitchPoint });
2515        }
2516    }
2517
2518
2519    @SuppressWarnings("unused")
2520    private static Object lexicalScopeFilter(final Object self) {
2521        if (self instanceof Global) {
2522            return ((Global) self).getLexicalScope();
2523        }
2524        return self;
2525    }
2526
2527    private <T extends ScriptObject> T initConstructorAndSwitchPoint(final String name, final Class<T> clazz) {
2528        final T func = initConstructor(name, clazz);
2529        tagBuiltinProperties(name, func);
2530        return func;
2531    }
2532
2533    private void init(final ScriptEngine eng) {
2534        assert Context.getGlobal() == this : "this global is not set as current";
2535
2536        final ScriptEnvironment env = getContext().getEnv();
2537
2538        // initialize Function and Object constructor
2539        initFunctionAndObject();
2540
2541        // Now fix Global's own proto.
2542        this.setInitialProto(getObjectPrototype());
2543
2544        // initialize global function properties
2545        this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
2546
2547        this.parseInt = ScriptFunctionImpl.makeFunction("parseInt",   GlobalFunctions.PARSEINT,
2548                    new Specialization[] {
2549                    new Specialization(GlobalFunctions.PARSEINT_Z),
2550                    new Specialization(GlobalFunctions.PARSEINT_I),
2551                    new Specialization(GlobalFunctions.PARSEINT_J),
2552                    new Specialization(GlobalFunctions.PARSEINT_OI),
2553                    new Specialization(GlobalFunctions.PARSEINT_O) });
2554        this.parseFloat = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2555        this.isNaN = ScriptFunctionImpl.makeFunction("isNaN",   GlobalFunctions.IS_NAN,
2556                   new Specialization[] {
2557                        new Specialization(GlobalFunctions.IS_NAN_I),
2558                        new Specialization(GlobalFunctions.IS_NAN_J),
2559                        new Specialization(GlobalFunctions.IS_NAN_D) });
2560        this.parseFloat         = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
2561        this.isNaN              = ScriptFunctionImpl.makeFunction("isNaN",      GlobalFunctions.IS_NAN);
2562        this.isFinite           = ScriptFunctionImpl.makeFunction("isFinite",   GlobalFunctions.IS_FINITE);
2563        this.encodeURI          = ScriptFunctionImpl.makeFunction("encodeURI",  GlobalFunctions.ENCODE_URI);
2564        this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
2565        this.decodeURI          = ScriptFunctionImpl.makeFunction("decodeURI",  GlobalFunctions.DECODE_URI);
2566        this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
2567        this.escape             = ScriptFunctionImpl.makeFunction("escape",     GlobalFunctions.ESCAPE);
2568        this.unescape           = ScriptFunctionImpl.makeFunction("unescape",   GlobalFunctions.UNESCAPE);
2569        this.print              = ScriptFunctionImpl.makeFunction("print",      env._print_no_newline ? PRINT : PRINTLN);
2570        this.load               = ScriptFunctionImpl.makeFunction("load",       LOAD);
2571        this.loadWithNewGlobal  = ScriptFunctionImpl.makeFunction("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL);
2572        this.exit               = ScriptFunctionImpl.makeFunction("exit",       EXIT);
2573        this.quit               = ScriptFunctionImpl.makeFunction("quit",       EXIT);
2574
2575        // built-in constructors
2576        this.builtinArray     = initConstructorAndSwitchPoint("Array", ScriptFunction.class);
2577        this.builtinBoolean   = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class);
2578        this.builtinNumber    = initConstructorAndSwitchPoint("Number", ScriptFunction.class);
2579        this.builtinString    = initConstructorAndSwitchPoint("String", ScriptFunction.class);
2580        this.builtinMath      = initConstructorAndSwitchPoint("Math", ScriptObject.class);
2581
2582        // initialize String.prototype.length to 0
2583        // add String.prototype.length
2584        final ScriptObject stringPrototype = getStringPrototype();
2585        stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
2586
2587        // set isArray flag on Array.prototype
2588        final ScriptObject arrayPrototype = getArrayPrototype();
2589        arrayPrototype.setIsArray();
2590
2591        // Error stuff
2592        initErrorObjects();
2593
2594        // java access
2595        if (! env._no_java) {
2596            this.javaApi = LAZY_SENTINEL;
2597            this.javaImporter = LAZY_SENTINEL;
2598            initJavaAccess();
2599        }
2600
2601        if (! env._no_typed_arrays) {
2602            this.arrayBuffer       = LAZY_SENTINEL;
2603            this.dataView          = LAZY_SENTINEL;
2604            this.int8Array         = LAZY_SENTINEL;
2605            this.uint8Array        = LAZY_SENTINEL;
2606            this.uint8ClampedArray = LAZY_SENTINEL;
2607            this.int16Array        = LAZY_SENTINEL;
2608            this.uint16Array       = LAZY_SENTINEL;
2609            this.int32Array        = LAZY_SENTINEL;
2610            this.uint32Array       = LAZY_SENTINEL;
2611            this.float32Array      = LAZY_SENTINEL;
2612            this.float64Array      = LAZY_SENTINEL;
2613        }
2614
2615        if (env._scripting) {
2616            initScripting(env);
2617        }
2618
2619        if (Context.DEBUG) {
2620            boolean debugOkay;
2621            final SecurityManager sm = System.getSecurityManager();
2622            if (sm != null) {
2623                try {
2624                    sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
2625                    debugOkay = true;
2626                } catch (final SecurityException ignored) {
2627                    // if no permission, don't initialize Debug object
2628                    debugOkay = false;
2629                }
2630
2631            } else {
2632                debugOkay = true;
2633            }
2634
2635            if (debugOkay) {
2636                initDebug();
2637            }
2638        }
2639
2640        copyBuiltins();
2641
2642        // expose script (command line) arguments as "arguments" property of global
2643        arguments = wrapAsObject(env.getArguments().toArray());
2644        if (env._scripting) {
2645            // synonym for "arguments" in scripting mode
2646            addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
2647        }
2648
2649        if (eng != null) {
2650            // default file name
2651            addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
2652            // __noSuchProperty__ hook for ScriptContext search of missing variables
2653            final ScriptFunction noSuchProp = ScriptFunctionImpl.makeStrictFunction(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
2654            addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
2655        }
2656    }
2657
2658    private void initErrorObjects() {
2659        // Error objects
2660        this.builtinError = initConstructor("Error", ScriptFunction.class);
2661        final ScriptObject errorProto = getErrorPrototype();
2662
2663        // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
2664        final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
2665        final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
2666        errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
2667        final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
2668        final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
2669        errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
2670        final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
2671        final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
2672        errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
2673        final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
2674        final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
2675        errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
2676
2677        // ECMA 15.11.4.2 Error.prototype.name
2678        // Error.prototype.name = "Error";
2679        errorProto.set(NativeError.NAME, "Error", 0);
2680        // ECMA 15.11.4.3 Error.prototype.message
2681        // Error.prototype.message = "";
2682        errorProto.set(NativeError.MESSAGE, "", 0);
2683
2684        tagBuiltinProperties("Error", builtinError);
2685
2686        this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
2687        this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
2688        this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
2689    }
2690
2691    private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
2692        final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
2693        final ScriptObject prototype = ScriptFunction.getPrototype(cons);
2694        prototype.set(NativeError.NAME, name, 0);
2695        prototype.set(NativeError.MESSAGE, "", 0);
2696        prototype.setInitialProto(errorProto);
2697        tagBuiltinProperties(name, cons);
2698        return cons;
2699    }
2700
2701    private void initJavaAccess() {
2702        final ScriptObject objectProto = getObjectPrototype();
2703        this.builtinPackages = new NativeJavaPackage("", objectProto);
2704        this.builtinCom = new NativeJavaPackage("com", objectProto);
2705        this.builtinEdu = new NativeJavaPackage("edu", objectProto);
2706        this.builtinJava = new NativeJavaPackage("java", objectProto);
2707        this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
2708        this.builtinJavax = new NativeJavaPackage("javax", objectProto);
2709        this.builtinOrg = new NativeJavaPackage("org", objectProto);
2710    }
2711
2712    private void initScripting(final ScriptEnvironment scriptEnv) {
2713        Object value;
2714        value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
2715        addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
2716
2717        value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
2718        addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
2719
2720        final String execName = ScriptingFunctions.EXEC_NAME;
2721        value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
2722        addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
2723
2724        // Nashorn extension: global.echo (scripting-mode-only)
2725        // alias for "print"
2726        value = get("print");
2727        addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
2728
2729        // Nashorn extension: global.$OPTIONS (scripting-mode-only)
2730        final ScriptObject options = newObject();
2731        copyOptions(options, scriptEnv);
2732        addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
2733
2734        // Nashorn extension: global.$ENV (scripting-mode-only)
2735        if (System.getSecurityManager() == null) {
2736            // do not fill $ENV if we have a security manager around
2737            // Retrieve current state of ENV variables.
2738            final ScriptObject env = newObject();
2739            env.putAll(System.getenv(), scriptEnv._strict);
2740
2741            // Some platforms, e.g., Windows, do not define the PWD environment
2742            // variable, so that the $ENV.PWD property needs to be explicitly
2743            // set.
2744            if (!env.containsKey(ScriptingFunctions.PWD_NAME)) {
2745                env.put(ScriptingFunctions.PWD_NAME, System.getProperty("user.dir"), scriptEnv._strict);
2746            }
2747
2748            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
2749        } else {
2750            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2751        }
2752
2753        // add other special properties for exec support
2754        addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2755        addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2756        addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2757    }
2758
2759    private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
2760        for (final Field f : scriptEnv.getClass().getFields()) {
2761            try {
2762                options.set(f.getName(), f.get(scriptEnv), 0);
2763            } catch (final IllegalArgumentException | IllegalAccessException exp) {
2764                throw new RuntimeException(exp);
2765            }
2766        }
2767    }
2768
2769    private void copyBuiltins() {
2770        this.array             = this.builtinArray;
2771        this._boolean          = this.builtinBoolean;
2772        this.error             = this.builtinError;
2773        this.function          = this.builtinFunction;
2774        this.com               = this.builtinCom;
2775        this.edu               = this.builtinEdu;
2776        this.java              = this.builtinJava;
2777        this.javafx            = this.builtinJavafx;
2778        this.javax             = this.builtinJavax;
2779        this.org               = this.builtinOrg;
2780        this.math              = this.builtinMath;
2781        this.number            = this.builtinNumber;
2782        this.object            = this.builtinObject;
2783        this.packages          = this.builtinPackages;
2784        this.referenceError    = this.builtinReferenceError;
2785        this.string            = this.builtinString;
2786        this.syntaxError       = this.builtinSyntaxError;
2787        this.typeError         = this.builtinTypeError;
2788    }
2789
2790    private void initDebug() {
2791        this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
2792    }
2793
2794    private Object printImpl(final boolean newLine, final Object... objects) {
2795        final ScriptContext sc = currentContext();
2796        @SuppressWarnings("resource")
2797        final PrintWriter out = sc != null? new PrintWriter(sc.getWriter()) : getContext().getEnv().getOut();
2798        final StringBuilder sb = new StringBuilder();
2799
2800        for (final Object obj : objects) {
2801            if (sb.length() != 0) {
2802                sb.append(' ');
2803            }
2804
2805            sb.append(JSType.toString(obj));
2806        }
2807
2808        // Print all at once to ensure thread friendly result.
2809        if (newLine) {
2810            out.println(sb.toString());
2811        } else {
2812            out.print(sb.toString());
2813        }
2814
2815        out.flush();
2816
2817        return UNDEFINED;
2818    }
2819
2820    private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
2821        try {
2822            // Assuming class name pattern for built-in JS constructors.
2823            final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
2824
2825            sb.append("Native");
2826            sb.append(name);
2827            sb.append("$Constructor");
2828
2829            final Class<?> funcClass = Class.forName(sb.toString());
2830            final T res = clazz.cast(funcClass.newInstance());
2831
2832            if (res instanceof ScriptFunction) {
2833                // All global constructor prototypes are not-writable,
2834                // not-enumerable and not-configurable.
2835                final ScriptFunction func = (ScriptFunction)res;
2836                func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
2837            }
2838
2839            if (res.getProto() == null) {
2840                res.setInitialProto(getObjectPrototype());
2841            }
2842
2843            res.setIsBuiltin();
2844
2845            return res;
2846        } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
2847            throw new RuntimeException(e);
2848        }
2849    }
2850
2851    private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) {
2852        final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>();
2853
2854        list.addAll(Arrays.asList(func.getMap().getProperties()));
2855
2856        if (func instanceof ScriptFunction) {
2857            final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func);
2858            if (proto != null) {
2859                list.addAll(Arrays.asList(proto.getMap().getProperties()));
2860            }
2861        }
2862
2863        final jdk.nashorn.internal.runtime.Property prop = getProperty(name);
2864        if (prop != null) {
2865            list.add(prop);
2866        }
2867
2868        return list;
2869    }
2870
2871    /**
2872     * Given a builtin object, traverse its properties recursively and associate them with a name that
2873     * will be a key to their invalidation switchpoint.
2874     * @param name name for key
2875     * @param func builtin script object
2876     */
2877    private void tagBuiltinProperties(final String name, final ScriptObject func) {
2878        SwitchPoint sp = context.getBuiltinSwitchPoint(name);
2879        if (sp == null) {
2880            sp = context.newBuiltinSwitchPoint(name);
2881        }
2882
2883        //get all builtin properties in this builtin object and register switchpoints keyed on the propery name,
2884        //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc
2885        for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) {
2886            prop.setBuiltinSwitchPoint(sp);
2887        }
2888    }
2889
2890    // Function and Object constructors are inter-dependent. Also,
2891    // Function.prototype
2892    // functions are not properly initialized. We fix the references here.
2893    // NOTE: be careful if you want to re-order the operations here. You may
2894    // have
2895    // to play with object references carefully!!
2896    private void initFunctionAndObject() {
2897        // First-n-foremost is Function
2898
2899        this.builtinFunction = initConstructor("Function", ScriptFunction.class);
2900
2901        // create global anonymous function
2902        final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
2903        // need to copy over members of Function.prototype to anon function
2904        anon.addBoundProperties(getFunctionPrototype());
2905
2906        // Function.prototype === Object.getPrototypeOf(Function) ===
2907        // <anon-function>
2908        builtinFunction.setInitialProto(anon);
2909        builtinFunction.setPrototype(anon);
2910        anon.set("constructor", builtinFunction, 0);
2911        anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
2912
2913        // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
2914        this.typeErrorThrower = new ScriptFunctionImpl("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER, null, null, 0);
2915        typeErrorThrower.setPrototype(UNDEFINED);
2916        // Non-constructor built-in functions do not have "prototype" property
2917        typeErrorThrower.deleteOwnProperty(typeErrorThrower.getMap().findProperty("prototype"));
2918        typeErrorThrower.preventExtensions();
2919
2920        // now initialize Object
2921        this.builtinObject = initConstructor("Object", ScriptFunction.class);
2922        final ScriptObject ObjectPrototype = getObjectPrototype();
2923        // Object.getPrototypeOf(Function.prototype) === Object.prototype
2924        anon.setInitialProto(ObjectPrototype);
2925
2926        // ES6 draft compliant __proto__ property of Object.prototype
2927        // accessors on Object.prototype for "__proto__"
2928        final ScriptFunction getProto = ScriptFunctionImpl.makeFunction("getProto", NativeObject.GET__PROTO__);
2929        final ScriptFunction setProto = ScriptFunctionImpl.makeFunction("setProto", NativeObject.SET__PROTO__);
2930        ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
2931
2932        // Function valued properties of Function.prototype were not properly
2933        // initialized. Because, these were created before global.function and
2934        // global.object were not initialized.
2935        jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
2936        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2937            final Object key = property.getKey();
2938            final Object value = builtinFunction.get(key);
2939
2940            if (value instanceof ScriptFunction && value != anon) {
2941                final ScriptFunction func = (ScriptFunction)value;
2942                func.setInitialProto(getFunctionPrototype());
2943                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2944                if (prototype != null) {
2945                    prototype.setInitialProto(ObjectPrototype);
2946                }
2947            }
2948        }
2949
2950        // For function valued properties of Object and Object.prototype, make
2951        // sure prototype's proto chain ends with Object.prototype
2952        for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
2953            final Object key = property.getKey();
2954            final Object value = builtinObject.get(key);
2955
2956            if (value instanceof ScriptFunction) {
2957                final ScriptFunction func = (ScriptFunction)value;
2958                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2959                if (prototype != null) {
2960                    prototype.setInitialProto(ObjectPrototype);
2961                }
2962            }
2963        }
2964
2965        properties = getObjectPrototype().getMap().getProperties();
2966
2967        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2968            final Object key   = property.getKey();
2969            if (key.equals("constructor")) {
2970                continue;
2971            }
2972
2973            final Object value = ObjectPrototype.get(key);
2974            if (value instanceof ScriptFunction) {
2975                final ScriptFunction func = (ScriptFunction)value;
2976                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2977                if (prototype != null) {
2978                    prototype.setInitialProto(ObjectPrototype);
2979                }
2980            }
2981        }
2982
2983        tagBuiltinProperties("Object", builtinObject);
2984        tagBuiltinProperties("Function", builtinFunction);
2985        tagBuiltinProperties("Function", anon);
2986    }
2987
2988    private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
2989        return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
2990    }
2991
2992    RegExpResult getLastRegExpResult() {
2993        return lastRegExpResult;
2994    }
2995
2996    void setLastRegExpResult(final RegExpResult regExpResult) {
2997        this.lastRegExpResult = regExpResult;
2998    }
2999
3000    @Override
3001    protected boolean isGlobal() {
3002        return true;
3003    }
3004
3005    /**
3006     * A class representing the ES6 global lexical scope.
3007     */
3008    private static class LexicalScope extends ScriptObject {
3009
3010        LexicalScope(final Global global) {
3011            super(global, PropertyMap.newMap());
3012        }
3013
3014        @Override
3015        protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
3016            return filterInvocation(super.findGetMethod(desc, request, operator));
3017        }
3018
3019        @Override
3020        protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
3021            return filterInvocation(super.findSetMethod(desc, request));
3022        }
3023
3024        @Override
3025        protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property) {
3026            // We override this method just to make it callable by Global
3027            return super.addBoundProperty(propMap, source, property);
3028        }
3029
3030        private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) {
3031            final MethodType type = invocation.getInvocation().type();
3032            return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER);
3033        }
3034    }
3035
3036}
3037