Global.java revision 1449:d8936a4a0186 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.objects;
27
28import static jdk.nashorn.internal.lookup.Lookup.MH;
29import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
30import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
31import static jdk.nashorn.internal.runtime.JSType.isString;
32import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
33
34import java.io.IOException;
35import java.io.PrintWriter;
36import java.lang.invoke.MethodHandle;
37import java.lang.invoke.MethodHandles;
38import java.lang.invoke.MethodType;
39import java.lang.invoke.SwitchPoint;
40import java.lang.reflect.Field;
41import java.util.ArrayList;
42import java.util.Arrays;
43import java.util.List;
44import java.util.Map;
45import java.util.Objects;
46import java.util.concurrent.Callable;
47import java.util.concurrent.ConcurrentHashMap;
48import javax.script.ScriptContext;
49import javax.script.ScriptEngine;
50import jdk.internal.dynalink.CallSiteDescriptor;
51import jdk.internal.dynalink.linker.GuardedInvocation;
52import jdk.internal.dynalink.linker.LinkRequest;
53import jdk.nashorn.api.scripting.ClassFilter;
54import jdk.nashorn.api.scripting.ScriptObjectMirror;
55import jdk.nashorn.internal.lookup.Lookup;
56import jdk.nashorn.internal.objects.annotations.Attribute;
57import jdk.nashorn.internal.objects.annotations.Getter;
58import jdk.nashorn.internal.objects.annotations.Property;
59import jdk.nashorn.internal.objects.annotations.ScriptClass;
60import jdk.nashorn.internal.objects.annotations.Setter;
61import jdk.nashorn.internal.runtime.Context;
62import jdk.nashorn.internal.runtime.ECMAErrors;
63import jdk.nashorn.internal.runtime.FindProperty;
64import jdk.nashorn.internal.runtime.GlobalConstants;
65import jdk.nashorn.internal.runtime.GlobalFunctions;
66import jdk.nashorn.internal.runtime.JSType;
67import jdk.nashorn.internal.runtime.NativeJavaPackage;
68import jdk.nashorn.internal.runtime.PropertyDescriptor;
69import jdk.nashorn.internal.runtime.PropertyMap;
70import jdk.nashorn.internal.runtime.Scope;
71import jdk.nashorn.internal.runtime.ScriptEnvironment;
72import jdk.nashorn.internal.runtime.ScriptFunction;
73import jdk.nashorn.internal.runtime.ScriptObject;
74import jdk.nashorn.internal.runtime.ScriptRuntime;
75import jdk.nashorn.internal.runtime.ScriptingFunctions;
76import jdk.nashorn.internal.runtime.Specialization;
77import jdk.nashorn.internal.runtime.arrays.ArrayData;
78import jdk.nashorn.internal.runtime.linker.Bootstrap;
79import jdk.nashorn.internal.runtime.linker.InvokeByName;
80import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
81import jdk.nashorn.internal.runtime.regexp.RegExpResult;
82import jdk.nashorn.internal.scripts.JD;
83import jdk.nashorn.internal.scripts.JO;
84import jdk.nashorn.tools.ShellFunctions;
85
86/**
87 * Representation of global scope.
88 */
89@ScriptClass("Global")
90public final class Global extends Scope {
91    // This special value is used to flag a lazily initialized global property.
92    // This also serves as placeholder value used in place of a location property
93    // (__FILE__, __DIR__, __LINE__)
94    private static final Object LAZY_SENTINEL = new Object();
95
96    private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
97    private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
98
99    /**
100     * Optimistic builtin names that require switchpoint invalidation
101     * upon assignment. Overly conservative, but works for now, to avoid
102     * any complicated scope checks and especially heavy weight guards
103     * like
104     *
105     * <pre>
106     *     public boolean setterGuard(final Object receiver) {
107     *         final Global          global = Global.instance();
108     *         final ScriptObject    sobj   = global.getFunctionPrototype();
109     *         final Object          apply  = sobj.get("apply");
110     *         return apply == receiver;
111     *     }
112     * </pre>
113     *
114     * Naturally, checking for builtin classes like NativeFunction is cheaper,
115     * it's when you start adding property checks for said builtins you have
116     * problems with guard speed.
117     */
118
119    /** Nashorn extension: arguments array */
120    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
121    public Object arguments;
122
123    /** ECMA 15.1.2.2 parseInt (string , radix) */
124    @Property(attributes = Attribute.NOT_ENUMERABLE)
125    public Object parseInt;
126
127    /** ECMA 15.1.2.3 parseFloat (string) */
128    @Property(attributes = Attribute.NOT_ENUMERABLE)
129    public Object parseFloat;
130
131    /** ECMA 15.1.2.4 isNaN (number) */
132    @Property(attributes = Attribute.NOT_ENUMERABLE)
133    public Object isNaN;
134
135    /** ECMA 15.1.2.5 isFinite (number) */
136    @Property(attributes = Attribute.NOT_ENUMERABLE)
137    public Object isFinite;
138
139    /** ECMA 15.1.3.3 encodeURI */
140    @Property(attributes = Attribute.NOT_ENUMERABLE)
141    public Object encodeURI;
142
143    /** ECMA 15.1.3.4 encodeURIComponent */
144    @Property(attributes = Attribute.NOT_ENUMERABLE)
145    public Object encodeURIComponent;
146
147    /** ECMA 15.1.3.1 decodeURI */
148    @Property(attributes = Attribute.NOT_ENUMERABLE)
149    public Object decodeURI;
150
151    /** ECMA 15.1.3.2 decodeURIComponent */
152    @Property(attributes = Attribute.NOT_ENUMERABLE)
153    public Object decodeURIComponent;
154
155    /** ECMA B.2.1 escape (string) */
156    @Property(attributes = Attribute.NOT_ENUMERABLE)
157    public Object escape;
158
159    /** ECMA B.2.2 unescape (string) */
160    @Property(attributes = Attribute.NOT_ENUMERABLE)
161    public Object unescape;
162
163    /** Nashorn extension: global.print */
164    @Property(attributes = Attribute.NOT_ENUMERABLE)
165    public Object print;
166
167    /** Nashorn extension: global.load */
168    @Property(attributes = Attribute.NOT_ENUMERABLE)
169    public Object load;
170
171    /** Nashorn extension: global.loadWithNewGlobal */
172    @Property(attributes = Attribute.NOT_ENUMERABLE)
173    public Object loadWithNewGlobal;
174
175    /** Nashorn extension: global.exit */
176    @Property(attributes = Attribute.NOT_ENUMERABLE)
177    public Object exit;
178
179    /** Nashorn extension: global.quit */
180    @Property(attributes = Attribute.NOT_ENUMERABLE)
181    public Object quit;
182
183    /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
184    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
185    public static final double NaN = Double.NaN;
186
187    /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
188    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
189    public static final double Infinity = Double.POSITIVE_INFINITY;
190
191    /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
192    @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
193    public static final Object undefined = UNDEFINED;
194
195    /** ECMA 15.1.2.1 eval(x) */
196    @Property(attributes = Attribute.NOT_ENUMERABLE)
197    public Object eval;
198
199    /** ECMA 15.1.4.1 Object constructor. */
200    @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
201    public volatile Object object;
202
203    /** ECMA 15.1.4.2 Function constructor. */
204    @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
205    public volatile Object function;
206
207    /** ECMA 15.1.4.3 Array constructor. */
208    @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
209    public volatile Object array;
210
211    /** ECMA 15.1.4.4 String constructor */
212    @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
213    public volatile Object string;
214
215    /** ECMA 15.1.4.5 Boolean constructor */
216    @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
217    public volatile Object _boolean;
218
219    /** ECMA 15.1.4.6 - Number constructor */
220    @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
221    public volatile Object number;
222
223    /**
224     * Getter for ECMA 15.1.4.7 Date property
225     *
226     * @param self self reference
227     * @return Date property value
228     */
229    @Getter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
230    public static Object getDate(final Object self) {
231        final Global global = Global.instanceFrom(self);
232        if (global.date == LAZY_SENTINEL) {
233            global.date = global.getBuiltinDate();
234        }
235        return global.date;
236    }
237
238    /**
239     * Setter for ECMA 15.1.4.7 Date property
240     *
241     * @param self self reference
242     * @param value value for the Date property
243     */
244    @Setter(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
245    public static void setDate(final Object self, final Object value) {
246        final Global global = Global.instanceFrom(self);
247        global.date = value;
248    }
249
250    private volatile Object date = LAZY_SENTINEL;
251
252    /**
253     * Getter for ECMA 15.1.4.8 RegExp property
254     *
255     * @param self self reference
256     * @return RegExp property value
257     */
258    @Getter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
259    public static Object getRegExp(final Object self) {
260        final Global global = Global.instanceFrom(self);
261        if (global.regexp == LAZY_SENTINEL) {
262            global.regexp = global.getBuiltinRegExp();
263        }
264        return global.regexp;
265    }
266
267    /**
268     * Setter for ECMA 15.1.4.8 RegExp property
269     *
270     * @param self self reference
271     * @param value value for the RegExp property
272     */
273    @Setter(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
274    public static void setRegExp(final Object self, final Object value) {
275        final Global global = Global.instanceFrom(self);
276        global.regexp = value;
277    }
278
279    private volatile Object regexp = LAZY_SENTINEL;
280
281    /**
282     * Getter for ECMA 15.12 - The JSON property
283     * @param self self reference
284     * @return the value of JSON property
285     */
286    @Getter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
287    public static Object getJSON(final Object self) {
288        final Global global = Global.instanceFrom(self);
289        if (global.json == LAZY_SENTINEL) {
290            global.json = global.getBuiltinJSON();
291        }
292        return global.json;
293    }
294
295    /**
296     * Setter for ECMA 15.12 - The JSON property
297     * @param self self reference
298     * @param value value for the JSON property
299     */
300    @Setter(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
301    public static void setJSON(final Object self, final Object value) {
302        final Global global = Global.instanceFrom(self);
303        global.json = value;
304    }
305
306    private volatile Object json = LAZY_SENTINEL;
307
308    /**
309     * Getter for Nashorn extension: global.JSAdapter
310     * @param self self reference
311     * @return value of the JSAdapter property
312     */
313    @Getter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
314    public static Object getJSAdapter(final Object self) {
315        final Global global = Global.instanceFrom(self);
316        if (global.jsadapter == LAZY_SENTINEL) {
317            global.jsadapter = global.getBuiltinJSAdapter();
318        }
319        return global.jsadapter;
320    }
321
322    /**
323     * Setter for Nashorn extension: global.JSAdapter
324     * @param self self reference
325     * @param value value for the JSAdapter property
326     */
327    @Setter(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
328    public static void setJSAdapter(final Object self, final Object value) {
329        final Global global = Global.instanceFrom(self);
330        global.jsadapter = value;
331    }
332
333    private volatile Object jsadapter = LAZY_SENTINEL;
334
335    /** ECMA 15.8 - The Math object */
336    @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
337    public volatile Object math;
338
339    /** Error object */
340    @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
341    public volatile Object error;
342
343    /**
344     * Getter for the EvalError property
345     * @param self self reference
346     * @return the value of EvalError property
347     */
348    @Getter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
349    public static Object getEvalError(final Object self) {
350        final Global global = Global.instanceFrom(self);
351        if (global.evalError == LAZY_SENTINEL) {
352            global.evalError = global.getBuiltinEvalError();
353        }
354        return global.evalError;
355    }
356
357    /**
358     * Setter for the EvalError property
359     * @param self self reference
360     * @param value value of the EvalError property
361     */
362    @Setter(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
363    public static void setEvalError(final Object self, final Object value) {
364        final Global global = Global.instanceFrom(self);
365        global.evalError = value;
366    }
367
368    private volatile Object evalError = LAZY_SENTINEL;
369
370    /**
371     * Getter for the RangeError property.
372     * @param self self reference
373     * @return the value of RangeError property
374     */
375    @Getter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
376    public static Object getRangeError(final Object self) {
377        final Global global = Global.instanceFrom(self);
378        if (global.rangeError == LAZY_SENTINEL) {
379            global.rangeError = global.getBuiltinRangeError();
380        }
381        return global.rangeError;
382    }
383
384
385    /**
386     * Setter for the RangeError property.
387     * @param self self reference
388     * @param value value for the RangeError property
389     */
390    @Setter(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
391    public static void setRangeError(final Object self, final Object value) {
392        final Global global = Global.instanceFrom(self);
393        global.rangeError = value;
394    }
395
396    private volatile Object rangeError = LAZY_SENTINEL;
397
398    /** ReferenceError object */
399    @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
400    public volatile Object referenceError;
401
402    /** SyntaxError object */
403    @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
404    public volatile Object syntaxError;
405
406    /** TypeError object */
407    @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
408    public volatile Object typeError;
409
410    /**
411     * Getter for the URIError property.
412     * @param self self reference
413     * @return the value of URIError property
414     */
415    @Getter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
416    public static Object getURIError(final Object self) {
417        final Global global = Global.instanceFrom(self);
418        if (global.uriError == LAZY_SENTINEL) {
419            global.uriError = global.getBuiltinURIError();
420        }
421        return global.uriError;
422    }
423
424    /**
425     * Setter for the URIError property.
426     * @param self self reference
427     * @param value value for the URIError property
428     */
429    @Setter(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
430    public static void setURIError(final Object self, final Object value) {
431        final Global global = Global.instanceFrom(self);
432        global.uriError = value;
433    }
434
435    private volatile Object uriError = LAZY_SENTINEL;
436
437    /**
438     * Getter for the ArrayBuffer property.
439     * @param self self reference
440     * @return the value of the ArrayBuffer property
441     */
442    @Getter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
443    public static Object getArrayBuffer(final Object self) {
444        final Global global = Global.instanceFrom(self);
445        if (global.arrayBuffer == LAZY_SENTINEL) {
446            global.arrayBuffer = global.getBuiltinArrayBuffer();
447        }
448        return global.arrayBuffer;
449    }
450
451    /**
452     * Setter for the ArrayBuffer property.
453     * @param self self reference
454     * @param value value of the ArrayBuffer property
455     */
456    @Setter(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
457    public static void setArrayBuffer(final Object self, final Object value) {
458        final Global global = Global.instanceFrom(self);
459        global.arrayBuffer = value;
460    }
461
462    private volatile Object arrayBuffer;
463
464    /**
465     * Getter for the DataView property.
466     * @param self self reference
467     * @return the value of the DataView property
468     */
469    @Getter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
470    public static Object getDataView(final Object self) {
471        final Global global = Global.instanceFrom(self);
472        if (global.dataView == LAZY_SENTINEL) {
473            global.dataView = global.getBuiltinDataView();
474        }
475        return global.dataView;
476    }
477
478
479    /**
480     * Setter for the DataView property.
481     * @param self self reference
482     * @param value value of the DataView property
483     */
484    @Setter(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
485    public static void setDataView(final Object self, final Object value) {
486        final Global global = Global.instanceFrom(self);
487        global.dataView = value;
488    }
489
490    private volatile Object dataView;
491
492    /**
493     * Getter for the Int8Array property.
494     * @param self self reference
495     * @return the value of the Int8Array property.
496     */
497    @Getter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
498    public static Object getInt8Array(final Object self) {
499        final Global global = Global.instanceFrom(self);
500        if (global.int8Array == LAZY_SENTINEL) {
501            global.int8Array = global.getBuiltinInt8Array();
502        }
503        return global.int8Array;
504    }
505
506    /**
507     * Setter for the Int8Array property.
508     * @param self self reference
509     * @param value value of the Int8Array property
510     */
511    @Setter(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
512    public static void setInt8Array(final Object self, final Object value) {
513        final Global global = Global.instanceFrom(self);
514        global.int8Array = value;
515    }
516
517    private volatile Object int8Array;
518
519    /**
520     * Getter for the Uin8Array property.
521     * @param self self reference
522     * @return the value of the Uint8Array property
523     */
524    @Getter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
525    public static Object getUint8Array(final Object self) {
526        final Global global = Global.instanceFrom(self);
527        if (global.uint8Array == LAZY_SENTINEL) {
528            global.uint8Array = global.getBuiltinUint8Array();
529        }
530        return global.uint8Array;
531    }
532
533    /**
534     * Setter for the Uin8Array property.
535     * @param self self reference
536     * @param value value of the Uin8Array property
537     */
538    @Setter(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
539    public static void setUint8Array(final Object self, final Object value) {
540        final Global global = Global.instanceFrom(self);
541        global.uint8Array = value;
542    }
543
544    private volatile Object uint8Array;
545
546    /**
547     * Getter for the Uint8ClampedArray property.
548     * @param self self reference
549     * @return the value of the Uint8ClampedArray property
550     */
551    @Getter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
552    public static Object getUint8ClampedArray(final Object self) {
553        final Global global = Global.instanceFrom(self);
554        if (global.uint8ClampedArray == LAZY_SENTINEL) {
555            global.uint8ClampedArray = global.getBuiltinUint8ClampedArray();
556        }
557        return global.uint8ClampedArray;
558    }
559
560    /**
561     * Setter for the Uint8ClampedArray property.
562     * @param self self reference
563     * @param value value of the Uint8ClampedArray property
564     */
565    @Setter(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
566    public static void setUint8ClampedArray(final Object self, final Object value) {
567        final Global global = Global.instanceFrom(self);
568        global.uint8ClampedArray = value;
569    }
570
571    private volatile Object uint8ClampedArray;
572
573    /**
574     * Getter for the Int16Array property.
575     * @param self self reference
576     * @return the value of the Int16Array property
577     */
578    @Getter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
579    public static Object getInt16Array(final Object self) {
580        final Global global = Global.instanceFrom(self);
581        if (global.int16Array == LAZY_SENTINEL) {
582            global.int16Array = global.getBuiltinInt16Array();
583        }
584        return global.int16Array;
585    }
586
587    /**
588     * Setter for the Int16Array property.
589     * @param self self reference
590     * @param value value of the Int16Array property
591     */
592    @Setter(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
593    public static void setInt16Array(final Object self, final Object value) {
594        final Global global = Global.instanceFrom(self);
595        global.int16Array = value;
596    }
597
598    private volatile Object int16Array;
599
600    /**
601     * Getter for the Uint16Array property.
602     * @param self self reference
603     * @return the value of the Uint16Array property
604     */
605    @Getter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
606    public static Object getUint16Array(final Object self) {
607        final Global global = Global.instanceFrom(self);
608        if (global.uint16Array == LAZY_SENTINEL) {
609            global.uint16Array = global.getBuiltinUint16Array();
610        }
611        return global.uint16Array;
612    }
613
614    /**
615     * Setter for the Uint16Array property.
616     * @param self self reference
617     * @param value value of the Uint16Array property
618     */
619    @Setter(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
620    public static void setUint16Array(final Object self, final Object value) {
621        final Global global = Global.instanceFrom(self);
622        global.uint16Array = value;
623    }
624
625    private volatile Object uint16Array;
626
627    /**
628     * Getter for the Int32Array property.
629     *
630     * @param self self reference
631     * @return the value of the Int32Array property
632     */
633    @Getter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
634    public static Object getInt32Array(final Object self) {
635        final Global global = Global.instanceFrom(self);
636        if (global.int32Array == LAZY_SENTINEL) {
637            global.int32Array = global.getBuiltinInt32Array();
638        }
639        return global.int32Array;
640    }
641
642
643    /**
644     * Setter for the Int32Array property.
645     *
646     * @param self self reference
647     * @param value value of the Int32Array property
648     */
649    @Setter(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
650    public static void setInt32Array(final Object self, final Object value) {
651        final Global global = Global.instanceFrom(self);
652        global.int32Array = value;
653    }
654
655    private volatile Object int32Array;
656
657    /**
658     * Getter of the Uint32Array property.
659     *
660     * @param self self reference
661     * @return the value of the Uint32Array property
662     */
663    @Getter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
664    public static Object getUint32Array(final Object self) {
665        final Global global = Global.instanceFrom(self);
666        if (global.uint32Array == LAZY_SENTINEL) {
667            global.uint32Array = global.getBuiltinUint32Array();
668        }
669        return global.uint32Array;
670    }
671
672
673    /**
674     * Setter of the Uint32Array property.
675     *
676     * @param self self reference
677     * @param value value of the Uint32Array property
678     */
679    @Setter(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
680    public static void setUint32Array(final Object self, final Object value) {
681        final Global global = Global.instanceFrom(self);
682        global.uint32Array = value;
683    }
684
685    private volatile Object uint32Array;
686
687    /**
688     * Getter for the Float32Array property.
689     *
690     * @param self self reference
691     * @return the value of the Float32Array property
692     */
693    @Getter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
694    public static Object getFloat32Array(final Object self) {
695        final Global global = Global.instanceFrom(self);
696        if (global.float32Array == LAZY_SENTINEL) {
697            global.float32Array = global.getBuiltinFloat32Array();
698        }
699        return global.float32Array;
700    }
701
702    /**
703     * Setter for the Float32Array property.
704     *
705     * @param self self reference
706     * @param value value of the Float32Array property
707     */
708    @Setter(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
709    public static void setFloat32Array(final Object self, final Object value) {
710        final Global global = Global.instanceFrom(self);
711        global.float32Array = value;
712    }
713
714    private volatile Object float32Array;
715
716    /**
717     * Getter for the Float64Array property.
718     *
719     * @param self self reference
720     * @return the value of the Float64Array property
721     */
722    @Getter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
723    public static Object getFloat64Array(final Object self) {
724        final Global global = Global.instanceFrom(self);
725        if (global.float64Array == LAZY_SENTINEL) {
726            global.float64Array = global.getBuiltinFloat64Array();
727        }
728        return global.float64Array;
729    }
730
731    /**
732     * Setter for the Float64Array property.
733     *
734     * @param self self reference
735     * @param value value of the Float64Array property
736     */
737    @Setter(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
738    public static void setFloat64Array(final Object self, final Object value) {
739        final Global global = Global.instanceFrom(self);
740        global.float64Array = value;
741    }
742
743    private volatile Object float64Array;
744
745    /** Nashorn extension: Java access - global.Packages */
746    @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
747    public volatile Object packages;
748
749    /** Nashorn extension: Java access - global.com */
750    @Property(attributes = Attribute.NOT_ENUMERABLE)
751    public volatile Object com;
752
753    /** Nashorn extension: Java access - global.edu */
754    @Property(attributes = Attribute.NOT_ENUMERABLE)
755    public volatile Object edu;
756
757    /** Nashorn extension: Java access - global.java */
758    @Property(attributes = Attribute.NOT_ENUMERABLE)
759    public volatile Object java;
760
761    /** Nashorn extension: Java access - global.javafx */
762    @Property(attributes = Attribute.NOT_ENUMERABLE)
763    public volatile Object javafx;
764
765    /** Nashorn extension: Java access - global.javax */
766    @Property(attributes = Attribute.NOT_ENUMERABLE)
767    public volatile Object javax;
768
769    /** Nashorn extension: Java access - global.org */
770    @Property(attributes = Attribute.NOT_ENUMERABLE)
771    public volatile Object org;
772
773    /**
774     * Getter for the Nashorn extension: Java access - global.javaImporter.
775     *
776     * @param self self reference
777     * @return the value of the JavaImporter property
778     */
779    @Getter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
780    public static Object getJavaImporter(final Object self) {
781        final Global global = Global.instanceFrom(self);
782        if (global.javaImporter == LAZY_SENTINEL) {
783            global.javaImporter = global.getBuiltinJavaImporter();
784        }
785        return global.javaImporter;
786    }
787
788    /**
789     * Setter for the Nashorn extension: Java access - global.javaImporter.
790     *
791     * @param self self reference
792     * @param value value of the JavaImporter property
793     */
794    @Setter(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
795    public static void setJavaImporter(final Object self, final Object value) {
796        final Global global = Global.instanceFrom(self);
797        global.javaImporter = value;
798    }
799
800    private volatile Object javaImporter;
801
802    /**
803     * Getter for the Nashorn extension: global.Java property.
804     *
805     * @param self self reference
806     * @return the value of the Java property
807     */
808    @Getter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
809    public static Object getJavaApi(final Object self) {
810        final Global global = Global.instanceFrom(self);
811        if (global.javaApi == LAZY_SENTINEL) {
812            global.javaApi = global.getBuiltinJavaApi();
813        }
814        return global.javaApi;
815    }
816
817    /**
818     * Setter for the Nashorn extension: global.Java property.
819     *
820     * @param self self reference
821     * @param value value of the Java property
822     */
823    @Setter(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
824    public static void setJavaApi(final Object self, final Object value) {
825        final Global global = Global.instanceFrom(self);
826        global.javaApi = value;
827    }
828
829    private volatile Object javaApi;
830
831    /** Nashorn extension: current script's file name */
832    @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
833    public static final Object __FILE__ = LAZY_SENTINEL;
834
835    /** Nashorn extension: current script's directory */
836    @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
837    public static final Object __DIR__ = LAZY_SENTINEL;
838
839    /** Nashorn extension: current source line number being executed */
840    @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
841    public static final Object __LINE__ = LAZY_SENTINEL;
842
843    private volatile NativeDate DEFAULT_DATE;
844
845    /** Used as Date.prototype's default value */
846    NativeDate getDefaultDate() {
847        return DEFAULT_DATE;
848    }
849
850    private volatile NativeRegExp DEFAULT_REGEXP;
851
852    /** Used as RegExp.prototype's default value */
853    NativeRegExp getDefaultRegExp() {
854        return DEFAULT_REGEXP;
855    }
856
857    /*
858     * Built-in constructor objects: Even if user changes dynamic values of
859     * "Object", "Array" etc., we still want to keep original values of these
860     * constructors here. For example, we need to be able to create array,
861     * regexp literals even after user overwrites global "Array" or "RegExp"
862     * constructor - see also ECMA 262 spec. Annex D.
863     */
864    private ScriptFunction builtinFunction;
865    private ScriptFunction builtinObject;
866    private ScriptFunction builtinArray;
867    private ScriptFunction builtinBoolean;
868    private ScriptFunction builtinDate;
869    private ScriptObject   builtinJSON;
870    private ScriptFunction builtinJSAdapter;
871    private ScriptObject   builtinMath;
872    private ScriptFunction builtinNumber;
873    private ScriptFunction builtinRegExp;
874    private ScriptFunction builtinString;
875    private ScriptFunction builtinError;
876    private ScriptFunction builtinEval;
877    private ScriptFunction builtinEvalError;
878    private ScriptFunction builtinRangeError;
879    private ScriptFunction builtinReferenceError;
880    private ScriptFunction builtinSyntaxError;
881    private ScriptFunction builtinTypeError;
882    private ScriptFunction builtinURIError;
883    private ScriptObject   builtinPackages;
884    private ScriptObject   builtinCom;
885    private ScriptObject   builtinEdu;
886    private ScriptObject   builtinJava;
887    private ScriptObject   builtinJavafx;
888    private ScriptObject   builtinJavax;
889    private ScriptObject   builtinOrg;
890    private ScriptFunction builtinJavaImporter;
891    private ScriptObject   builtinJavaApi;
892    private ScriptFunction builtinArrayBuffer;
893    private ScriptFunction builtinDataView;
894    private ScriptFunction builtinInt8Array;
895    private ScriptFunction builtinUint8Array;
896    private ScriptFunction builtinUint8ClampedArray;
897    private ScriptFunction builtinInt16Array;
898    private ScriptFunction builtinUint16Array;
899    private ScriptFunction builtinInt32Array;
900    private ScriptFunction builtinUint32Array;
901    private ScriptFunction builtinFloat32Array;
902    private ScriptFunction builtinFloat64Array;
903
904    /*
905     * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
906     */
907    private ScriptFunction typeErrorThrower;
908
909    // Used to store the last RegExp result to support deprecated RegExp constructor properties
910    private RegExpResult lastRegExpResult;
911
912    private static final MethodHandle EVAL                 = findOwnMH_S("eval",                Object.class, Object.class, Object.class);
913    private static final MethodHandle NO_SUCH_PROPERTY     = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
914    private static final MethodHandle PRINT                = findOwnMH_S("print",               Object.class, Object.class, Object[].class);
915    private static final MethodHandle PRINTLN              = findOwnMH_S("println",             Object.class, Object.class, Object[].class);
916    private static final MethodHandle LOAD                 = findOwnMH_S("load",                Object.class, Object.class, Object.class);
917    private static final MethodHandle LOAD_WITH_NEW_GLOBAL = findOwnMH_S("loadWithNewGlobal",   Object.class, Object.class, Object[].class);
918    private static final MethodHandle EXIT                 = findOwnMH_S("exit",                Object.class, Object.class, Object.class);
919    private static final MethodHandle LEXICAL_SCOPE_FILTER = findOwnMH_S("lexicalScopeFilter",  Object.class, Object.class);
920
921    // initialized by nasgen
922    private static PropertyMap $nasgenmap$;
923
924    // context to which this global belongs to
925    private final Context context;
926
927    // current ScriptContext to use - can be null.
928    private ThreadLocal<ScriptContext> scontext;
929    // current ScriptEngine associated - can be null.
930    private ScriptEngine engine;
931
932    // ES6 global lexical scope.
933    private final LexicalScope lexicalScope;
934
935    // Switchpoint for non-constant global callsites in the presence of ES6 lexical scope.
936    private SwitchPoint lexicalScopeSwitchPoint;
937
938    /**
939     * Set the current script context
940     * @param ctxt script context
941     */
942    public void setScriptContext(final ScriptContext ctxt) {
943        assert scontext != null;
944        scontext.set(ctxt);
945    }
946
947    /**
948     * Get the current script context
949     * @return current script context
950     */
951    public ScriptContext getScriptContext() {
952        assert scontext != null;
953        return scontext.get();
954    }
955
956    private ScriptContext currentContext() {
957        final ScriptContext sc = scontext != null? scontext.get() : null;
958        return (sc != null)? sc : (engine != null? engine.getContext() : null);
959    }
960
961    @Override
962    protected Context getContext() {
963        return context;
964    }
965
966    @Override
967    protected boolean useDualFields() {
968        return context.useDualFields();
969    }
970
971    // performs initialization checks for Global constructor and returns the
972    // PropertyMap, if everything is fine.
973    private static PropertyMap checkAndGetMap(final Context context) {
974        // security check first
975        final SecurityManager sm = System.getSecurityManager();
976        if (sm != null) {
977            sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
978        }
979
980        Objects.requireNonNull(context);
981
982        return $nasgenmap$;
983    }
984
985    /**
986     * Constructor
987     *
988     * @param context the context
989     */
990    public Global(final Context context) {
991        super(checkAndGetMap(context));
992        this.context = context;
993        this.lexicalScope = context.getEnv()._es6 ? new LexicalScope(this) : null;
994    }
995
996    /**
997     * Script access to "current" Global instance
998     *
999     * @return the global singleton
1000     */
1001    public static Global instance() {
1002        return Objects.requireNonNull(Context.getGlobal());
1003    }
1004
1005    private static Global instanceFrom(final Object self) {
1006        return self instanceof Global? (Global)self : instance();
1007    }
1008
1009    /**
1010     * Check if we have a Global instance
1011     * @return true if one exists
1012     */
1013    public static boolean hasInstance() {
1014        return Context.getGlobal() != null;
1015    }
1016
1017    /**
1018     * Script access to {@link ScriptEnvironment}
1019     *
1020     * @return the script environment
1021     */
1022    static ScriptEnvironment getEnv() {
1023        return instance().getContext().getEnv();
1024    }
1025
1026    /**
1027     * Script access to {@link Context}
1028     *
1029     * @return the context
1030     */
1031    static Context getThisContext() {
1032        return instance().getContext();
1033    }
1034
1035    // Runtime interface to Global
1036
1037    /**
1038     * Is there a class filter in the current Context?
1039     * @return class filter
1040     */
1041    public ClassFilter getClassFilter() {
1042        return context.getClassFilter();
1043    }
1044
1045    /**
1046     * Is this global of the given Context?
1047     * @param ctxt the context
1048     * @return true if this global belongs to the given Context
1049     */
1050    public boolean isOfContext(final Context ctxt) {
1051        return this.context == ctxt;
1052    }
1053
1054    /**
1055     * Does this global belong to a strict Context?
1056     * @return true if this global belongs to a strict Context
1057     */
1058    public boolean isStrictContext() {
1059        return context.getEnv()._strict;
1060    }
1061
1062    /**
1063     * Initialize standard builtin objects like "Object", "Array", "Function" etc.
1064     * as well as our extension builtin objects like "Java", "JSAdapter" as properties
1065     * of the global scope object.
1066     *
1067     * @param eng ScriptEngine to initialize
1068     */
1069    public void initBuiltinObjects(final ScriptEngine eng) {
1070        if (this.builtinObject != null) {
1071            // already initialized, just return
1072            return;
1073        }
1074
1075        this.engine = eng;
1076        if (this.engine != null) {
1077            this.scontext = new ThreadLocal<>();
1078        }
1079        init(eng);
1080    }
1081
1082    /**
1083     * Wrap a Java object as corresponding script object
1084     *
1085     * @param obj object to wrap
1086     * @return    wrapped object
1087     */
1088    public Object wrapAsObject(final Object obj) {
1089        if (obj instanceof Boolean) {
1090            return new NativeBoolean((Boolean)obj, this);
1091        } else if (obj instanceof Number) {
1092            return new NativeNumber(((Number)obj).doubleValue(), this);
1093        } else if (isString(obj)) {
1094            return new NativeString((CharSequence)obj, this);
1095        } else if (obj instanceof Object[]) { // extension
1096            return new NativeArray(ArrayData.allocate((Object[])obj), this);
1097        } else if (obj instanceof double[]) { // extension
1098            return new NativeArray(ArrayData.allocate((double[])obj), this);
1099        } else if (obj instanceof long[]) {
1100            return new NativeArray(ArrayData.allocate((long[])obj), this);
1101        } else if (obj instanceof int[]) {
1102            return new NativeArray(ArrayData.allocate((int[]) obj), this);
1103        } else if (obj instanceof ArrayData) {
1104            return new NativeArray((ArrayData) obj, this);
1105        } else {
1106            // FIXME: more special cases? Map? List?
1107            return obj;
1108        }
1109    }
1110
1111    /**
1112     * Lookup helper for JS primitive types
1113     *
1114     * @param request the link request for the dynamic call site.
1115     * @param self     self reference
1116     *
1117     * @return guarded invocation
1118     */
1119    public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
1120        if (isString(self)) {
1121            return NativeString.lookupPrimitive(request, self);
1122        } else if (self instanceof Number) {
1123            return NativeNumber.lookupPrimitive(request, self);
1124        } else if (self instanceof Boolean) {
1125            return NativeBoolean.lookupPrimitive(request, self);
1126        }
1127        throw new IllegalArgumentException("Unsupported primitive: " + self);
1128    }
1129
1130    /**
1131     * Returns a method handle that creates a wrapper object for a JS primitive value.
1132     *
1133     * @param self receiver object
1134     * @return method handle to create wrapper objects for primitive receiver
1135     */
1136    public static MethodHandle getPrimitiveWrapFilter(final Object self) {
1137        if (isString(self)) {
1138            return NativeString.WRAPFILTER;
1139        } else if (self instanceof Number) {
1140            return NativeNumber.WRAPFILTER;
1141        } else if (self instanceof Boolean) {
1142            return NativeBoolean.WRAPFILTER;
1143        }
1144        throw new IllegalArgumentException("Unsupported primitive: " + self);
1145    }
1146
1147
1148    /**
1149     * Create a new empty script object
1150     *
1151     * @return the new ScriptObject
1152     */
1153    public ScriptObject newObject() {
1154        return useDualFields() ? new JD(getObjectPrototype()) : new JO(getObjectPrototype());
1155    }
1156
1157    /**
1158     * Default value of given type
1159     *
1160     * @param sobj     script object
1161     * @param typeHint type hint
1162     *
1163     * @return default value
1164     */
1165    public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
1166        // When the [[DefaultValue]] internal method of O is called with no hint,
1167        // then it behaves as if the hint were Number, unless O is a Date object
1168        // in which case it behaves as if the hint were String.
1169        Class<?> hint = typeHint;
1170        if (hint == null) {
1171            hint = Number.class;
1172        }
1173
1174        try {
1175            if (hint == String.class) {
1176
1177                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1178
1179                if (Bootstrap.isCallable(toString)) {
1180                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1181                    if (JSType.isPrimitive(value)) {
1182                        return value;
1183                    }
1184                }
1185
1186                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1187                if (Bootstrap.isCallable(valueOf)) {
1188                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1189                    if (JSType.isPrimitive(value)) {
1190                        return value;
1191                    }
1192                }
1193                throw typeError(this, "cannot.get.default.string");
1194            }
1195
1196            if (hint == Number.class) {
1197                final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
1198                if (Bootstrap.isCallable(valueOf)) {
1199                    final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
1200                    if (JSType.isPrimitive(value)) {
1201                        return value;
1202                    }
1203                }
1204
1205                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
1206                if (Bootstrap.isCallable(toString)) {
1207                    final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
1208                    if (JSType.isPrimitive(value)) {
1209                        return value;
1210                    }
1211                }
1212
1213                throw typeError(this, "cannot.get.default.number");
1214            }
1215        } catch (final RuntimeException | Error e) {
1216            throw e;
1217        } catch (final Throwable t) {
1218            throw new RuntimeException(t);
1219        }
1220
1221        return UNDEFINED;
1222    }
1223
1224    /**
1225     * Is the given ScriptObject an ECMAScript Error object?
1226     *
1227     * @param sobj the object being checked
1228     * @return true if sobj is an Error object
1229     */
1230    public boolean isError(final ScriptObject sobj) {
1231        final ScriptObject errorProto = getErrorPrototype();
1232        ScriptObject proto = sobj.getProto();
1233        while (proto != null) {
1234            if (proto == errorProto) {
1235                return true;
1236            }
1237            proto = proto.getProto();
1238        }
1239        return false;
1240    }
1241
1242    /**
1243     * Create a new ECMAScript Error object.
1244     *
1245     * @param msg error message
1246     * @return newly created Error object
1247     */
1248    public ScriptObject newError(final String msg) {
1249        return new NativeError(msg, this);
1250    }
1251
1252    /**
1253     * Create a new ECMAScript EvalError object.
1254     *
1255     * @param msg error message
1256     * @return newly created EvalError object
1257     */
1258    public ScriptObject newEvalError(final String msg) {
1259        return new NativeEvalError(msg, this);
1260    }
1261
1262    /**
1263     * Create a new ECMAScript RangeError object.
1264     *
1265     * @param msg error message
1266     * @return newly created RangeError object
1267     */
1268    public ScriptObject newRangeError(final String msg) {
1269        return new NativeRangeError(msg, this);
1270    }
1271
1272    /**
1273     * Create a new ECMAScript ReferenceError object.
1274     *
1275     * @param msg error message
1276     * @return newly created ReferenceError object
1277     */
1278    public ScriptObject newReferenceError(final String msg) {
1279        return new NativeReferenceError(msg, this);
1280    }
1281
1282    /**
1283     * Create a new ECMAScript SyntaxError object.
1284     *
1285     * @param msg error message
1286     * @return newly created SyntaxError object
1287     */
1288    public ScriptObject newSyntaxError(final String msg) {
1289        return new NativeSyntaxError(msg, this);
1290    }
1291
1292    /**
1293     * Create a new ECMAScript TypeError object.
1294     *
1295     * @param msg error message
1296     * @return newly created TypeError object
1297     */
1298    public ScriptObject newTypeError(final String msg) {
1299        return new NativeTypeError(msg, this);
1300    }
1301
1302    /**
1303     * Create a new ECMAScript URIError object.
1304     *
1305     * @param msg error message
1306     * @return newly created URIError object
1307     */
1308    public ScriptObject newURIError(final String msg) {
1309        return new NativeURIError(msg, this);
1310    }
1311
1312    /**
1313     * Create a new ECMAScript GenericDescriptor object.
1314     *
1315     * @param configurable is the property configurable?
1316     * @param enumerable is the property enumerable?
1317     * @return newly created GenericDescriptor object
1318     */
1319    public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
1320        return new GenericPropertyDescriptor(configurable, enumerable, this);
1321    }
1322
1323    /**
1324     * Create a new ECMAScript DatePropertyDescriptor object.
1325     *
1326     * @param value of the data property
1327     * @param configurable is the property configurable?
1328     * @param enumerable is the property enumerable?
1329     * @param writable is the property writable?
1330     * @return newly created DataPropertyDescriptor object
1331     */
1332    public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
1333        return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
1334    }
1335
1336    /**
1337     * Create a new ECMAScript AccessorPropertyDescriptor object.
1338     *
1339     * @param get getter function of the user accessor property
1340     * @param set setter function of the user accessor property
1341     * @param configurable is the property configurable?
1342     * @param enumerable is the property enumerable?
1343     * @return newly created AccessorPropertyDescriptor object
1344     */
1345    public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
1346        final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
1347
1348        if (get == null) {
1349            desc.delete(PropertyDescriptor.GET, false);
1350        }
1351
1352        if (set == null) {
1353            desc.delete(PropertyDescriptor.SET, false);
1354        }
1355
1356        return desc;
1357    }
1358
1359    private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
1360        final T obj = map.get(key);
1361        if (obj != null) {
1362            return obj;
1363        }
1364
1365        try {
1366            final T newObj = creator.call();
1367            final T existingObj = map.putIfAbsent(key, newObj);
1368            return existingObj != null ? existingObj : newObj;
1369        } catch (final Exception exp) {
1370            throw new RuntimeException(exp);
1371        }
1372    }
1373
1374    private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
1375
1376
1377    /**
1378     * Get cached InvokeByName object for the given key
1379     * @param key key to be associated with InvokeByName object
1380     * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
1381     * @return InvokeByName object associated with the key.
1382     */
1383    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
1384        return getLazilyCreatedValue(key, creator, namedInvokers);
1385    }
1386
1387    private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
1388
1389    /**
1390     * Get cached dynamic method handle for the given key
1391     * @param key key to be associated with dynamic method handle
1392     * @param creator if method handle is absent 'creator' is called to make one (lazy init)
1393     * @return dynamic method handle associated with the key.
1394     */
1395    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
1396        return getLazilyCreatedValue(key, creator, dynamicInvokers);
1397    }
1398
1399    /**
1400     * Hook to search missing variables in ScriptContext if available
1401     * @param self used to detect if scope call or not (this function is 'strict')
1402     * @param name name of the variable missing
1403     * @return value of the missing variable or undefined (or TypeError for scope search)
1404     */
1405    public static Object __noSuchProperty__(final Object self, final Object name) {
1406        final Global global = Global.instance();
1407        final ScriptContext sctxt = global.currentContext();
1408        final String nameStr = name.toString();
1409
1410        if (sctxt != null) {
1411            final int scope = sctxt.getAttributesScope(nameStr);
1412            if (scope != -1) {
1413                return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
1414            }
1415        }
1416
1417        switch (nameStr) {
1418        case "context":
1419            return sctxt;
1420        case "engine":
1421            return global.engine;
1422        default:
1423            break;
1424        }
1425
1426        if (self == UNDEFINED) {
1427            // scope access and so throw ReferenceError
1428            throw referenceError(global, "not.defined", nameStr);
1429        }
1430
1431        return UNDEFINED;
1432    }
1433
1434    /**
1435     * This is the eval used when 'indirect' eval call is made.
1436     *
1437     * var global = this;
1438     * global.eval("print('hello')");
1439     *
1440     * @param self  eval scope
1441     * @param str   eval string
1442     *
1443     * @return the result of eval
1444     */
1445    public static Object eval(final Object self, final Object str) {
1446        return directEval(self, str, Global.instanceFrom(self), UNDEFINED, false);
1447    }
1448
1449    /**
1450     * Direct eval
1451     *
1452     * @param self     The scope of eval passed as 'self'
1453     * @param str      Evaluated code
1454     * @param callThis "this" to be passed to the evaluated code
1455     * @param location location of the eval call
1456     * @param strict   is eval called from a strict mode code?
1457     *
1458     * @return the return value of the eval
1459     *
1460     * This is directly invoked from generated when eval(code) is called in user code
1461     */
1462    public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
1463        if (!isString(str)) {
1464            return str;
1465        }
1466        final Global global = Global.instanceFrom(self);
1467        final ScriptObject scope = self instanceof ScriptObject && ((ScriptObject)self).isScope() ? (ScriptObject)self : global;
1468
1469        return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
1470    }
1471
1472    /**
1473     * Global print implementation - Nashorn extension
1474     *
1475     * @param self    scope
1476     * @param objects arguments to print
1477     *
1478     * @return result of print (undefined)
1479     */
1480    public static Object print(final Object self, final Object... objects) {
1481        return Global.instanceFrom(self).printImpl(false, objects);
1482    }
1483
1484    /**
1485     * Global println implementation - Nashorn extension
1486     *
1487     * @param self    scope
1488     * @param objects arguments to print
1489     *
1490     * @return result of println (undefined)
1491     */
1492    public static Object println(final Object self, final Object... objects) {
1493        return Global.instanceFrom(self).printImpl(true, objects);
1494    }
1495
1496    /**
1497     * Global load implementation - Nashorn extension.
1498     *
1499     * <p>
1500     * load builtin loads the given script. Script source can be a URL or a File
1501     * or a script object with name and script properties. Evaluated code gets
1502     * global object "this" and uses global object as scope for evaluation.
1503     * </p>
1504     * <p>
1505     * If self is undefined or null or global, then global object is used
1506     * as scope as well as "this" for the evaluated code. If self is any other
1507     * object, then it is indirect load call. With indirect load call, the
1508     * properties of scope are available to evaluated script as variables. Also,
1509     * global scope properties are accessible. Any var, function definition in
1510     * evaluated script goes into an object that is not accessible to user scripts.
1511     * </p>
1512     * Thus the indirect load call is equivalent to the following:
1513     * <pre>
1514     * <code>
1515     * (function (scope, source) {
1516     *    with(scope) {
1517     *        eval(&lt;script_from_source&gt;);
1518     *    }
1519     * })(self, source);
1520     * </code>
1521     * </pre>
1522     *
1523     * @param self    scope to use for the script evaluation
1524     * @param source  script source
1525     *
1526     * @return result of load (may be undefined)
1527     *
1528     * @throws IOException if source could not be read
1529     */
1530    public static Object load(final Object self, final Object source) throws IOException {
1531        final Global global = Global.instanceFrom(self);
1532        return global.getContext().load(self, source);
1533    }
1534
1535    /**
1536     * Global loadWithNewGlobal implementation - Nashorn extension.
1537     *
1538     * loadWithNewGlobal builtin loads the given script from a URL or a File
1539     * or a script object with name and script properties. Evaluated code gets
1540     * new global object "this" and uses that new global object as scope for evaluation.
1541     *
1542     * @param self self This value is ignored by this function
1543     * @param args optional arguments to be passed to the loaded script
1544     *
1545     * @return result of load (may be undefined)
1546     *
1547     * @throws IOException if source could not be read
1548     */
1549    public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
1550        final Global global = Global.instanceFrom(self);
1551        final int length = args.length;
1552        final boolean hasArgs = 0 < length;
1553        final Object from = hasArgs ? args[0] : UNDEFINED;
1554        final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
1555
1556        return global.getContext().loadWithNewGlobal(from, arguments);
1557    }
1558
1559    /**
1560     * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
1561     *
1562     * @param self  self reference
1563     * @param code  exit code
1564     *
1565     * @return undefined (will never be reached)
1566     */
1567    public static Object exit(final Object self, final Object code) {
1568        System.exit(JSType.toInt32(code));
1569        return UNDEFINED;
1570    }
1571
1572    // builtin prototype accessors
1573
1574    /**
1575     * Get the builtin Object prototype.
1576     * @return the object prototype.
1577     */
1578    public ScriptObject getObjectPrototype() {
1579        return ScriptFunction.getPrototype(builtinObject);
1580    }
1581
1582    /**
1583     * Get the builtin Function prototype.
1584     * @return the Function.prototype.
1585     */
1586    public ScriptObject getFunctionPrototype() {
1587        return ScriptFunction.getPrototype(builtinFunction);
1588    }
1589
1590    ScriptObject getArrayPrototype() {
1591        return ScriptFunction.getPrototype(builtinArray);
1592    }
1593
1594    ScriptObject getBooleanPrototype() {
1595        return ScriptFunction.getPrototype(builtinBoolean);
1596    }
1597
1598    ScriptObject getNumberPrototype() {
1599        return ScriptFunction.getPrototype(builtinNumber);
1600    }
1601
1602    ScriptObject getDatePrototype() {
1603        return ScriptFunction.getPrototype(getBuiltinDate());
1604    }
1605
1606    ScriptObject getRegExpPrototype() {
1607        return ScriptFunction.getPrototype(getBuiltinRegExp());
1608    }
1609
1610    ScriptObject getStringPrototype() {
1611        return ScriptFunction.getPrototype(builtinString);
1612    }
1613
1614    ScriptObject getErrorPrototype() {
1615        return ScriptFunction.getPrototype(builtinError);
1616    }
1617
1618    ScriptObject getEvalErrorPrototype() {
1619        return ScriptFunction.getPrototype(getBuiltinEvalError());
1620    }
1621
1622    ScriptObject getRangeErrorPrototype() {
1623        return ScriptFunction.getPrototype(getBuiltinRangeError());
1624    }
1625
1626    ScriptObject getReferenceErrorPrototype() {
1627        return ScriptFunction.getPrototype(builtinReferenceError);
1628    }
1629
1630    ScriptObject getSyntaxErrorPrototype() {
1631        return ScriptFunction.getPrototype(builtinSyntaxError);
1632    }
1633
1634    ScriptObject getTypeErrorPrototype() {
1635        return ScriptFunction.getPrototype(builtinTypeError);
1636    }
1637
1638    ScriptObject getURIErrorPrototype() {
1639        return ScriptFunction.getPrototype(getBuiltinURIError());
1640    }
1641
1642    ScriptObject getJavaImporterPrototype() {
1643        return ScriptFunction.getPrototype(getBuiltinJavaImporter());
1644    }
1645
1646    ScriptObject getJSAdapterPrototype() {
1647        return ScriptFunction.getPrototype(getBuiltinJSAdapter());
1648    }
1649
1650    private synchronized ScriptFunction getBuiltinArrayBuffer() {
1651        if (this.builtinArrayBuffer == null) {
1652            this.builtinArrayBuffer = initConstructorAndSwitchPoint("ArrayBuffer", ScriptFunction.class);
1653        }
1654        return this.builtinArrayBuffer;
1655    }
1656
1657    ScriptObject getArrayBufferPrototype() {
1658        return ScriptFunction.getPrototype(getBuiltinArrayBuffer());
1659    }
1660
1661    private synchronized ScriptFunction getBuiltinDataView() {
1662        if (this.builtinDataView == null) {
1663            this.builtinDataView = initConstructorAndSwitchPoint("DataView", ScriptFunction.class);
1664        }
1665        return this.builtinDataView;
1666    }
1667
1668    ScriptObject getDataViewPrototype() {
1669        return ScriptFunction.getPrototype(getBuiltinDataView());
1670    }
1671
1672    private synchronized ScriptFunction getBuiltinInt8Array() {
1673        if (this.builtinInt8Array == null) {
1674            this.builtinInt8Array = initConstructorAndSwitchPoint("Int8Array", ScriptFunction.class);
1675        }
1676        return this.builtinInt8Array;
1677    }
1678
1679    ScriptObject getInt8ArrayPrototype() {
1680        return ScriptFunction.getPrototype(getBuiltinInt8Array());
1681    }
1682
1683    private synchronized ScriptFunction getBuiltinUint8Array() {
1684        if (this.builtinUint8Array == null) {
1685            this.builtinUint8Array = initConstructorAndSwitchPoint("Uint8Array", ScriptFunction.class);
1686        }
1687        return this.builtinUint8Array;
1688    }
1689
1690    ScriptObject getUint8ArrayPrototype() {
1691        return ScriptFunction.getPrototype(getBuiltinUint8Array());
1692    }
1693
1694    private synchronized ScriptFunction getBuiltinUint8ClampedArray() {
1695        if (this.builtinUint8ClampedArray == null) {
1696            this.builtinUint8ClampedArray = initConstructorAndSwitchPoint("Uint8ClampedArray", ScriptFunction.class);
1697        }
1698        return this.builtinUint8ClampedArray;
1699    }
1700
1701    ScriptObject getUint8ClampedArrayPrototype() {
1702        return ScriptFunction.getPrototype(getBuiltinUint8ClampedArray());
1703    }
1704
1705    private synchronized ScriptFunction getBuiltinInt16Array() {
1706        if (this.builtinInt16Array == null) {
1707            this.builtinInt16Array = initConstructorAndSwitchPoint("Int16Array", ScriptFunction.class);
1708        }
1709        return this.builtinInt16Array;
1710    }
1711
1712    ScriptObject getInt16ArrayPrototype() {
1713        return ScriptFunction.getPrototype(getBuiltinInt16Array());
1714    }
1715
1716    private synchronized ScriptFunction getBuiltinUint16Array() {
1717        if (this.builtinUint16Array == null) {
1718            this.builtinUint16Array = initConstructorAndSwitchPoint("Uint16Array", ScriptFunction.class);
1719        }
1720        return this.builtinUint16Array;
1721    }
1722
1723    ScriptObject getUint16ArrayPrototype() {
1724        return ScriptFunction.getPrototype(getBuiltinUint16Array());
1725    }
1726
1727    private synchronized ScriptFunction getBuiltinInt32Array() {
1728        if (this.builtinInt32Array == null) {
1729            this.builtinInt32Array = initConstructorAndSwitchPoint("Int32Array", ScriptFunction.class);
1730        }
1731        return this.builtinInt32Array;
1732    }
1733
1734    ScriptObject getInt32ArrayPrototype() {
1735        return ScriptFunction.getPrototype(getBuiltinInt32Array());
1736    }
1737
1738    private synchronized ScriptFunction getBuiltinUint32Array() {
1739        if (this.builtinUint32Array == null) {
1740            this.builtinUint32Array = initConstructorAndSwitchPoint("Uint32Array", ScriptFunction.class);
1741        }
1742        return this.builtinUint32Array;
1743    }
1744
1745    ScriptObject getUint32ArrayPrototype() {
1746        return ScriptFunction.getPrototype(getBuiltinUint32Array());
1747    }
1748
1749    private synchronized ScriptFunction getBuiltinFloat32Array() {
1750        if (this.builtinFloat32Array == null) {
1751            this.builtinFloat32Array = initConstructorAndSwitchPoint("Float32Array", ScriptFunction.class);
1752        }
1753        return this.builtinFloat32Array;
1754    }
1755
1756    ScriptObject getFloat32ArrayPrototype() {
1757        return ScriptFunction.getPrototype(getBuiltinFloat32Array());
1758    }
1759
1760    private synchronized ScriptFunction getBuiltinFloat64Array() {
1761        if (this.builtinFloat64Array == null) {
1762            this.builtinFloat64Array = initConstructorAndSwitchPoint("Float64Array", ScriptFunction.class);
1763        }
1764        return this.builtinFloat64Array;
1765    }
1766
1767    ScriptObject getFloat64ArrayPrototype() {
1768        return ScriptFunction.getPrototype(getBuiltinFloat64Array());
1769    }
1770
1771    /**
1772     * Return the function that throws TypeError unconditionally. Used as "poison" methods for certain Function properties.
1773     *
1774     * @return the TypeError throwing function
1775     */
1776    public ScriptFunction getTypeErrorThrower() {
1777        return typeErrorThrower;
1778    }
1779
1780    private synchronized ScriptFunction getBuiltinDate() {
1781        if (this.builtinDate == null) {
1782            this.builtinDate = initConstructorAndSwitchPoint("Date", ScriptFunction.class);
1783            final ScriptObject dateProto = ScriptFunction.getPrototype(builtinDate);
1784            // initialize default date
1785            this.DEFAULT_DATE = new NativeDate(NaN, dateProto);
1786        }
1787        return this.builtinDate;
1788    }
1789
1790    private synchronized ScriptFunction getBuiltinEvalError() {
1791        if (this.builtinEvalError == null) {
1792            this.builtinEvalError = initErrorSubtype("EvalError", getErrorPrototype());
1793        }
1794        return this.builtinEvalError;
1795    }
1796
1797    private ScriptFunction getBuiltinFunction() {
1798        return builtinFunction;
1799    }
1800
1801    /**
1802     * Get the switchpoint used to check property changes for Function.prototype.apply
1803     * @return the switchpoint guarding apply (same as guarding call, and everything else in function)
1804     */
1805    public static SwitchPoint getBuiltinFunctionApplySwitchPoint() {
1806        return ScriptFunction.getPrototype(Global.instance().getBuiltinFunction()).getProperty("apply").getBuiltinSwitchPoint();
1807    }
1808
1809    private static boolean isBuiltinFunctionProperty(final String name) {
1810        final Global instance = Global.instance();
1811        final ScriptFunction builtinFunction = instance.getBuiltinFunction();
1812        if (builtinFunction == null) {
1813            return false; //conservative for compile-only mode
1814        }
1815        final boolean isBuiltinFunction = instance.function == builtinFunction;
1816        return isBuiltinFunction && ScriptFunction.getPrototype(builtinFunction).getProperty(name).isBuiltin();
1817    }
1818
1819    /**
1820     * Check if the Function.prototype.apply has not been replaced
1821     * @return true if Function.prototype.apply has been replaced
1822     */
1823    public static boolean isBuiltinFunctionPrototypeApply() {
1824        return isBuiltinFunctionProperty("apply");
1825    }
1826
1827    /**
1828     * Check if the Function.prototype.apply has not been replaced
1829     * @return true if Function.prototype.call has been replaced
1830     */
1831    public static boolean isBuiltinFunctionPrototypeCall() {
1832        return isBuiltinFunctionProperty("call");
1833    }
1834
1835    private synchronized ScriptFunction getBuiltinJSAdapter() {
1836        if (this.builtinJSAdapter == null) {
1837            this.builtinJSAdapter = initConstructorAndSwitchPoint("JSAdapter", ScriptFunction.class);
1838        }
1839        return builtinJSAdapter;
1840    }
1841
1842    private synchronized ScriptObject getBuiltinJSON() {
1843        if (this.builtinJSON == null) {
1844            this.builtinJSON = initConstructorAndSwitchPoint("JSON", ScriptObject.class);
1845        }
1846        return this.builtinJSON;
1847    }
1848
1849    private synchronized ScriptFunction getBuiltinJavaImporter() {
1850        if (this.builtinJavaImporter == null) {
1851            this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
1852        }
1853        return this.builtinJavaImporter;
1854    }
1855
1856    private synchronized ScriptObject getBuiltinJavaApi() {
1857        if (this.builtinJavaApi == null) {
1858            this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
1859        }
1860        return this.builtinJavaApi;
1861    }
1862
1863    private synchronized ScriptFunction getBuiltinRangeError() {
1864        if (this.builtinRangeError == null) {
1865            this.builtinRangeError = initErrorSubtype("RangeError", getErrorPrototype());
1866        }
1867        return builtinRangeError;
1868    }
1869
1870    private synchronized ScriptFunction getBuiltinRegExp() {
1871        if (this.builtinRegExp == null) {
1872            this.builtinRegExp = initConstructorAndSwitchPoint("RegExp", ScriptFunction.class);
1873            final ScriptObject regExpProto = ScriptFunction.getPrototype(builtinRegExp);
1874            // initialize default regexp object
1875            this.DEFAULT_REGEXP = new NativeRegExp("(?:)", "", this, regExpProto);
1876            // RegExp.prototype should behave like a RegExp object. So copy the
1877            // properties.
1878            regExpProto.addBoundProperties(DEFAULT_REGEXP);
1879        }
1880        return builtinRegExp;
1881    }
1882
1883    private synchronized ScriptFunction getBuiltinURIError() {
1884        if (this.builtinURIError == null) {
1885            this.builtinURIError = initErrorSubtype("URIError", getErrorPrototype());
1886        }
1887        return this.builtinURIError;
1888    }
1889
1890    @Override
1891    public String getClassName() {
1892        return "global";
1893    }
1894
1895    /**
1896     * Copy function used to clone NativeRegExp objects.
1897     *
1898     * @param regexp a NativeRegExp to clone
1899     *
1900     * @return copy of the given regexp object
1901     */
1902    public static Object regExpCopy(final Object regexp) {
1903        return new NativeRegExp((NativeRegExp)regexp);
1904    }
1905
1906    /**
1907     * Convert given object to NativeRegExp type.
1908     *
1909     * @param obj object to be converted
1910     * @return NativeRegExp instance
1911     */
1912    public static NativeRegExp toRegExp(final Object obj) {
1913        if (obj instanceof NativeRegExp) {
1914            return (NativeRegExp)obj;
1915        }
1916        return new NativeRegExp(JSType.toString(obj));
1917    }
1918
1919    /**
1920     * ECMA 9.9 ToObject implementation
1921     *
1922     * @param obj  an item for which to run ToObject
1923     * @return ToObject version of given item
1924     */
1925    public static Object toObject(final Object obj) {
1926        if (obj == null || obj == UNDEFINED) {
1927            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
1928        }
1929
1930        if (obj instanceof ScriptObject) {
1931            return obj;
1932        }
1933
1934        return instance().wrapAsObject(obj);
1935    }
1936
1937    /**
1938     * Allocate a new object array.
1939     *
1940     * @param initial object values.
1941     * @return the new array
1942     */
1943    public static NativeArray allocate(final Object[] initial) {
1944        ArrayData arrayData = ArrayData.allocate(initial);
1945
1946        for (int index = 0; index < initial.length; index++) {
1947            final Object value = initial[index];
1948
1949            if (value == ScriptRuntime.EMPTY) {
1950                arrayData = arrayData.delete(index);
1951            }
1952        }
1953
1954        return new NativeArray(arrayData);
1955    }
1956
1957    /**
1958     * Allocate a new number array.
1959     *
1960     * @param initial number values.
1961     * @return the new array
1962     */
1963    public static NativeArray allocate(final double[] initial) {
1964        return new NativeArray(ArrayData.allocate(initial));
1965    }
1966
1967    /**
1968     * Allocate a new long array.
1969     *
1970     * @param initial number values.
1971     * @return the new array
1972     */
1973    public static NativeArray allocate(final long[] initial) {
1974        return new NativeArray(ArrayData.allocate(initial));
1975    }
1976
1977    /**
1978     * Allocate a new integer array.
1979     *
1980     * @param initial number values.
1981     * @return the new array
1982     */
1983    public static NativeArray allocate(final int[] initial) {
1984        return new NativeArray(ArrayData.allocate(initial));
1985    }
1986
1987    /**
1988     * Allocate a new object array for arguments.
1989     *
1990     * @param arguments initial arguments passed.
1991     * @param callee reference to the function that uses arguments object
1992     * @param numParams actual number of declared parameters
1993     *
1994     * @return the new array
1995     */
1996    public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
1997        return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
1998    }
1999
2000    /**
2001     * Called from generated to check if given function is the builtin 'eval'. If
2002     * eval is used in a script, a lot of optimizations and assumptions cannot be done.
2003     *
2004     * @param  fn function object that is checked
2005     * @return true if fn is the builtin eval
2006     */
2007    public static boolean isEval(final Object fn) {
2008        return fn == Global.instance().builtinEval;
2009    }
2010
2011    /**
2012     * Called from generated to replace a location property placeholder with the actual location property value.
2013     *
2014     * @param  placeholder the value tested for being a placeholder for a location property
2015     * @param  locationProperty the actual value for the location property
2016     * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
2017     */
2018    public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
2019        return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
2020    }
2021
2022    /**
2023     * Called from runtime internals to check if the passed value is a location property placeholder.
2024     * @param  placeholder the value tested for being a placeholder for a location property
2025     * @return true if the value is a placeholder, false otherwise.
2026     */
2027    public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
2028        return placeholder == LAZY_SENTINEL;
2029    }
2030
2031    /**
2032     * Create a new RegExp object.
2033     *
2034     * @param expression Regular expression.
2035     * @param options    Search options.
2036     *
2037     * @return New RegExp object.
2038     */
2039    public static Object newRegExp(final String expression, final String options) {
2040        if (options == null) {
2041            return new NativeRegExp(expression);
2042        }
2043        return new NativeRegExp(expression, options);
2044    }
2045
2046    /**
2047     * Get the object prototype
2048     *
2049     * @return the object prototype
2050     */
2051    public static ScriptObject objectPrototype() {
2052        return Global.instance().getObjectPrototype();
2053    }
2054
2055    /**
2056     * Create a new empty object instance.
2057     *
2058     * @return New empty object.
2059     */
2060    public static ScriptObject newEmptyInstance() {
2061        return Global.instance().newObject();
2062    }
2063
2064    /**
2065     * Check if a given object is a ScriptObject, raises an exception if this is
2066     * not the case
2067     *
2068     * @param obj and object to check
2069     * @return the script object
2070     */
2071    public static ScriptObject checkObject(final Object obj) {
2072        if (!(obj instanceof ScriptObject)) {
2073            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2074        }
2075        return (ScriptObject)obj;
2076    }
2077
2078    /**
2079     * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
2080     * if this object is null or undefined.
2081     *
2082     * @param obj an object to check
2083     */
2084    public static void checkObjectCoercible(final Object obj) {
2085        if (obj == null || obj == UNDEFINED) {
2086            throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
2087        }
2088    }
2089
2090    /**
2091     * Return the ES6 global scope for lexically declared bindings.
2092     * @return the ES6 lexical global scope.
2093     */
2094    public final ScriptObject getLexicalScope() {
2095        assert context.getEnv()._es6;
2096        return lexicalScope;
2097    }
2098
2099    @Override
2100    public void addBoundProperties(final ScriptObject source, final jdk.nashorn.internal.runtime.Property[] properties) {
2101        PropertyMap ownMap = getMap();
2102        LexicalScope lexScope = null;
2103        PropertyMap lexicalMap = null;
2104        boolean hasLexicalDefinitions = false;
2105
2106        if (context.getEnv()._es6) {
2107            lexScope = (LexicalScope) getLexicalScope();
2108            lexicalMap = lexScope.getMap();
2109
2110            for (final jdk.nashorn.internal.runtime.Property property : properties) {
2111                if (property.isLexicalBinding()) {
2112                    hasLexicalDefinitions = true;
2113                }
2114                // ES6 15.1.8 steps 6. and 7.
2115                final jdk.nashorn.internal.runtime.Property globalProperty = ownMap.findProperty(property.getKey());
2116                if (globalProperty != null && !globalProperty.isConfigurable() && property.isLexicalBinding()) {
2117                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2118                }
2119                final jdk.nashorn.internal.runtime.Property lexicalProperty = lexicalMap.findProperty(property.getKey());
2120                if (lexicalProperty != null && !property.isConfigurable()) {
2121                    throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
2122                }
2123            }
2124        }
2125
2126        final boolean extensible = isExtensible();
2127        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2128            if (property.isLexicalBinding()) {
2129                assert lexScope != null;
2130                lexicalMap = lexScope.addBoundProperty(lexicalMap, source, property, true);
2131
2132                if (ownMap.findProperty(property.getKey()) != null) {
2133                    // If property exists in the global object invalidate any global constant call sites.
2134                    invalidateGlobalConstant(property.getKey());
2135                }
2136            } else {
2137                ownMap = addBoundProperty(ownMap, source, property, extensible);
2138            }
2139        }
2140
2141        setMap(ownMap);
2142
2143        if (hasLexicalDefinitions) {
2144            assert lexScope != null;
2145            lexScope.setMap(lexicalMap);
2146            invalidateLexicalSwitchPoint();
2147        }
2148    }
2149
2150    @Override
2151    public GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2152        final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2153        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2154
2155        if (lexicalScope != null && isScope && !NashornCallSiteDescriptor.isApplyToCall(desc)) {
2156            if (lexicalScope.hasOwnProperty(name)) {
2157                return lexicalScope.findGetMethod(desc, request, operator);
2158            }
2159        }
2160
2161        final GuardedInvocation invocation =  super.findGetMethod(desc, request, operator);
2162
2163        // We want to avoid adding our generic lexical scope switchpoint to global constant invocations,
2164        // because those are invalidated per-key in the addBoundProperties method above.
2165        // We therefore check if the invocation does already have a switchpoint and the property is non-inherited,
2166        // assuming this only applies to global constants. If other non-inherited properties will
2167        // start using switchpoints some time in the future we'll have to revisit this.
2168        if (isScope && context.getEnv()._es6 && (invocation.getSwitchPoints() == null || !hasOwnProperty(name))) {
2169            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2170        }
2171
2172        return invocation;
2173    }
2174
2175    @Override
2176    protected FindProperty findProperty(final String key, final boolean deep, final ScriptObject start) {
2177        if (lexicalScope != null && start != this && start.isScope()) {
2178            final FindProperty find = lexicalScope.findProperty(key, false);
2179            if (find != null) {
2180                return find;
2181            }
2182        }
2183        return super.findProperty(key, deep, start);
2184    }
2185
2186    @Override
2187    public GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2188        final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
2189
2190        if (lexicalScope != null && isScope) {
2191            final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
2192            if (lexicalScope.hasOwnProperty(name)) {
2193                return lexicalScope.findSetMethod(desc, request);
2194            }
2195        }
2196
2197        final GuardedInvocation invocation = super.findSetMethod(desc, request);
2198
2199        if (isScope && context.getEnv()._es6) {
2200            return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
2201        }
2202
2203        return invocation;
2204    }
2205
2206    /**
2207     * Adds jjs shell interactive mode builtin functions to global scope.
2208     */
2209    public void addShellBuiltins() {
2210        Object value = ScriptFunction.createBuiltin("input", ShellFunctions.INPUT);
2211        addOwnProperty("input", Attribute.NOT_ENUMERABLE, value);
2212
2213        value = ScriptFunction.createBuiltin("evalinput", ShellFunctions.EVALINPUT);
2214        addOwnProperty("evalinput", Attribute.NOT_ENUMERABLE, value);
2215    }
2216
2217    private synchronized SwitchPoint getLexicalScopeSwitchPoint() {
2218        SwitchPoint switchPoint = lexicalScopeSwitchPoint;
2219        if (switchPoint == null || switchPoint.hasBeenInvalidated()) {
2220            switchPoint = lexicalScopeSwitchPoint = new SwitchPoint();
2221        }
2222        return switchPoint;
2223    }
2224
2225    private synchronized void invalidateLexicalSwitchPoint() {
2226        if (lexicalScopeSwitchPoint != null) {
2227            context.getLogger(GlobalConstants.class).info("Invalidating non-constant globals on lexical scope update");
2228            SwitchPoint.invalidateAll(new SwitchPoint[]{ lexicalScopeSwitchPoint });
2229        }
2230    }
2231
2232
2233    @SuppressWarnings("unused")
2234    private static Object lexicalScopeFilter(final Object self) {
2235        if (self instanceof Global) {
2236            return ((Global) self).getLexicalScope();
2237        }
2238        return self;
2239    }
2240
2241    private <T extends ScriptObject> T initConstructorAndSwitchPoint(final String name, final Class<T> clazz) {
2242        final T func = initConstructor(name, clazz);
2243        tagBuiltinProperties(name, func);
2244        return func;
2245    }
2246
2247    private void init(final ScriptEngine eng) {
2248        assert Context.getGlobal() == this : "this global is not set as current";
2249
2250        final ScriptEnvironment env = getContext().getEnv();
2251
2252        // initialize Function and Object constructor
2253        initFunctionAndObject();
2254
2255        // Now fix Global's own proto.
2256        this.setInitialProto(getObjectPrototype());
2257
2258        // initialize global function properties
2259        this.eval = this.builtinEval = ScriptFunction.createBuiltin("eval", EVAL);
2260
2261        this.parseInt = ScriptFunction.createBuiltin("parseInt",   GlobalFunctions.PARSEINT,
2262                    new Specialization[] {
2263                    new Specialization(GlobalFunctions.PARSEINT_Z),
2264                    new Specialization(GlobalFunctions.PARSEINT_I),
2265                    new Specialization(GlobalFunctions.PARSEINT_J),
2266                    new Specialization(GlobalFunctions.PARSEINT_OI),
2267                    new Specialization(GlobalFunctions.PARSEINT_O) });
2268        this.parseFloat = ScriptFunction.createBuiltin("parseFloat", GlobalFunctions.PARSEFLOAT);
2269        this.isNaN = ScriptFunction.createBuiltin("isNaN",   GlobalFunctions.IS_NAN,
2270                   new Specialization[] {
2271                        new Specialization(GlobalFunctions.IS_NAN_I),
2272                        new Specialization(GlobalFunctions.IS_NAN_J),
2273                        new Specialization(GlobalFunctions.IS_NAN_D) });
2274        this.parseFloat         = ScriptFunction.createBuiltin("parseFloat", GlobalFunctions.PARSEFLOAT);
2275        this.isNaN              = ScriptFunction.createBuiltin("isNaN",      GlobalFunctions.IS_NAN);
2276        this.isFinite           = ScriptFunction.createBuiltin("isFinite",   GlobalFunctions.IS_FINITE);
2277        this.encodeURI          = ScriptFunction.createBuiltin("encodeURI",  GlobalFunctions.ENCODE_URI);
2278        this.encodeURIComponent = ScriptFunction.createBuiltin("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
2279        this.decodeURI          = ScriptFunction.createBuiltin("decodeURI",  GlobalFunctions.DECODE_URI);
2280        this.decodeURIComponent = ScriptFunction.createBuiltin("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
2281        this.escape             = ScriptFunction.createBuiltin("escape",     GlobalFunctions.ESCAPE);
2282        this.unescape           = ScriptFunction.createBuiltin("unescape",   GlobalFunctions.UNESCAPE);
2283        this.print              = ScriptFunction.createBuiltin("print",      env._print_no_newline ? PRINT : PRINTLN);
2284        this.load               = ScriptFunction.createBuiltin("load",       LOAD);
2285        this.loadWithNewGlobal  = ScriptFunction.createBuiltin("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL);
2286        this.exit               = ScriptFunction.createBuiltin("exit",       EXIT);
2287        this.quit               = ScriptFunction.createBuiltin("quit",       EXIT);
2288
2289        // built-in constructors
2290        this.builtinArray     = initConstructorAndSwitchPoint("Array", ScriptFunction.class);
2291        this.builtinBoolean   = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class);
2292        this.builtinNumber    = initConstructorAndSwitchPoint("Number", ScriptFunction.class);
2293        this.builtinString    = initConstructorAndSwitchPoint("String", ScriptFunction.class);
2294        this.builtinMath      = initConstructorAndSwitchPoint("Math", ScriptObject.class);
2295
2296        // initialize String.prototype.length to 0
2297        // add String.prototype.length
2298        final ScriptObject stringPrototype = getStringPrototype();
2299        stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
2300
2301        // set isArray flag on Array.prototype
2302        final ScriptObject arrayPrototype = getArrayPrototype();
2303        arrayPrototype.setIsArray();
2304
2305        // Error stuff
2306        initErrorObjects();
2307
2308        // java access
2309        if (! env._no_java) {
2310            this.javaApi = LAZY_SENTINEL;
2311            this.javaImporter = LAZY_SENTINEL;
2312            initJavaAccess();
2313        }
2314
2315        if (! env._no_typed_arrays) {
2316            this.arrayBuffer       = LAZY_SENTINEL;
2317            this.dataView          = LAZY_SENTINEL;
2318            this.int8Array         = LAZY_SENTINEL;
2319            this.uint8Array        = LAZY_SENTINEL;
2320            this.uint8ClampedArray = LAZY_SENTINEL;
2321            this.int16Array        = LAZY_SENTINEL;
2322            this.uint16Array       = LAZY_SENTINEL;
2323            this.int32Array        = LAZY_SENTINEL;
2324            this.uint32Array       = LAZY_SENTINEL;
2325            this.float32Array      = LAZY_SENTINEL;
2326            this.float64Array      = LAZY_SENTINEL;
2327        }
2328
2329        if (env._scripting) {
2330            initScripting(env);
2331        }
2332
2333        if (Context.DEBUG) {
2334            boolean debugOkay;
2335            final SecurityManager sm = System.getSecurityManager();
2336            if (sm != null) {
2337                try {
2338                    sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
2339                    debugOkay = true;
2340                } catch (final SecurityException ignored) {
2341                    // if no permission, don't initialize Debug object
2342                    debugOkay = false;
2343                }
2344
2345            } else {
2346                debugOkay = true;
2347            }
2348
2349            if (debugOkay) {
2350                initDebug();
2351            }
2352        }
2353
2354        copyBuiltins();
2355
2356        // expose script (command line) arguments as "arguments" property of global
2357        arguments = wrapAsObject(env.getArguments().toArray());
2358        if (env._scripting) {
2359            // synonym for "arguments" in scripting mode
2360            addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
2361        }
2362
2363        if (eng != null) {
2364            // default file name
2365            addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
2366            // __noSuchProperty__ hook for ScriptContext search of missing variables
2367            final ScriptFunction noSuchProp = ScriptFunction.createStrictBuiltin(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
2368            addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
2369        }
2370    }
2371
2372    private void initErrorObjects() {
2373        // Error objects
2374        this.builtinError = initConstructor("Error", ScriptFunction.class);
2375        final ScriptObject errorProto = getErrorPrototype();
2376
2377        // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
2378        final ScriptFunction getStack = ScriptFunction.createBuiltin("getStack", NativeError.GET_STACK);
2379        final ScriptFunction setStack = ScriptFunction.createBuiltin("setStack", NativeError.SET_STACK);
2380        errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
2381        final ScriptFunction getLineNumber = ScriptFunction.createBuiltin("getLineNumber", NativeError.GET_LINENUMBER);
2382        final ScriptFunction setLineNumber = ScriptFunction.createBuiltin("setLineNumber", NativeError.SET_LINENUMBER);
2383        errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
2384        final ScriptFunction getColumnNumber = ScriptFunction.createBuiltin("getColumnNumber", NativeError.GET_COLUMNNUMBER);
2385        final ScriptFunction setColumnNumber = ScriptFunction.createBuiltin("setColumnNumber", NativeError.SET_COLUMNNUMBER);
2386        errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
2387        final ScriptFunction getFileName = ScriptFunction.createBuiltin("getFileName", NativeError.GET_FILENAME);
2388        final ScriptFunction setFileName = ScriptFunction.createBuiltin("setFileName", NativeError.SET_FILENAME);
2389        errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
2390
2391        // ECMA 15.11.4.2 Error.prototype.name
2392        // Error.prototype.name = "Error";
2393        errorProto.set(NativeError.NAME, "Error", 0);
2394        // ECMA 15.11.4.3 Error.prototype.message
2395        // Error.prototype.message = "";
2396        errorProto.set(NativeError.MESSAGE, "", 0);
2397
2398        tagBuiltinProperties("Error", builtinError);
2399
2400        this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
2401        this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
2402        this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
2403    }
2404
2405    private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
2406        final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
2407        final ScriptObject prototype = ScriptFunction.getPrototype(cons);
2408        prototype.set(NativeError.NAME, name, 0);
2409        prototype.set(NativeError.MESSAGE, "", 0);
2410        prototype.setInitialProto(errorProto);
2411        tagBuiltinProperties(name, cons);
2412        return cons;
2413    }
2414
2415    private void initJavaAccess() {
2416        final ScriptObject objectProto = getObjectPrototype();
2417        this.builtinPackages = new NativeJavaPackage("", objectProto);
2418        this.builtinCom = new NativeJavaPackage("com", objectProto);
2419        this.builtinEdu = new NativeJavaPackage("edu", objectProto);
2420        this.builtinJava = new NativeJavaPackage("java", objectProto);
2421        this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
2422        this.builtinJavax = new NativeJavaPackage("javax", objectProto);
2423        this.builtinOrg = new NativeJavaPackage("org", objectProto);
2424    }
2425
2426    private void initScripting(final ScriptEnvironment scriptEnv) {
2427        ScriptObject value;
2428        value = ScriptFunction.createBuiltin("readLine", ScriptingFunctions.READLINE);
2429        addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
2430
2431        value = ScriptFunction.createBuiltin("readFully", ScriptingFunctions.READFULLY);
2432        addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
2433
2434        final String execName = ScriptingFunctions.EXEC_NAME;
2435        value = ScriptFunction.createBuiltin(execName, ScriptingFunctions.EXEC);
2436        value.addOwnProperty(ScriptingFunctions.THROW_ON_ERROR_NAME, Attribute.NOT_ENUMERABLE, false);
2437
2438        addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
2439
2440        // Nashorn extension: global.echo (scripting-mode-only)
2441        // alias for "print"
2442        value = (ScriptObject)get("print");
2443        addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
2444
2445        // Nashorn extension: global.$OPTIONS (scripting-mode-only)
2446        final ScriptObject options = newObject();
2447        copyOptions(options, scriptEnv);
2448        addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
2449
2450        // Nashorn extension: global.$ENV (scripting-mode-only)
2451        if (System.getSecurityManager() == null) {
2452            // do not fill $ENV if we have a security manager around
2453            // Retrieve current state of ENV variables.
2454            final ScriptObject env = newObject();
2455            env.putAll(System.getenv(), scriptEnv._strict);
2456
2457            // Some platforms, e.g., Windows, do not define the PWD environment
2458            // variable, so that the $ENV.PWD property needs to be explicitly
2459            // set.
2460            if (!env.containsKey(ScriptingFunctions.PWD_NAME)) {
2461                env.put(ScriptingFunctions.PWD_NAME, System.getProperty("user.dir"), scriptEnv._strict);
2462            }
2463
2464            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
2465        } else {
2466            addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2467        }
2468
2469        // add other special properties for exec support
2470        addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2471        addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2472        addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2473    }
2474
2475    private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
2476        for (final Field f : scriptEnv.getClass().getFields()) {
2477            try {
2478                options.set(f.getName(), f.get(scriptEnv), 0);
2479            } catch (final IllegalArgumentException | IllegalAccessException exp) {
2480                throw new RuntimeException(exp);
2481            }
2482        }
2483    }
2484
2485    private void copyBuiltins() {
2486        this.array             = this.builtinArray;
2487        this._boolean          = this.builtinBoolean;
2488        this.error             = this.builtinError;
2489        this.function          = this.builtinFunction;
2490        this.com               = this.builtinCom;
2491        this.edu               = this.builtinEdu;
2492        this.java              = this.builtinJava;
2493        this.javafx            = this.builtinJavafx;
2494        this.javax             = this.builtinJavax;
2495        this.org               = this.builtinOrg;
2496        this.math              = this.builtinMath;
2497        this.number            = this.builtinNumber;
2498        this.object            = this.builtinObject;
2499        this.packages          = this.builtinPackages;
2500        this.referenceError    = this.builtinReferenceError;
2501        this.string            = this.builtinString;
2502        this.syntaxError       = this.builtinSyntaxError;
2503        this.typeError         = this.builtinTypeError;
2504    }
2505
2506    private void initDebug() {
2507        this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
2508    }
2509
2510    private Object printImpl(final boolean newLine, final Object... objects) {
2511        final ScriptContext sc = currentContext();
2512        @SuppressWarnings("resource")
2513        final PrintWriter out = sc != null? new PrintWriter(sc.getWriter()) : getContext().getEnv().getOut();
2514        final StringBuilder sb = new StringBuilder();
2515
2516        for (final Object obj : objects) {
2517            if (sb.length() != 0) {
2518                sb.append(' ');
2519            }
2520
2521            sb.append(JSType.toString(obj));
2522        }
2523
2524        // Print all at once to ensure thread friendly result.
2525        if (newLine) {
2526            out.println(sb.toString());
2527        } else {
2528            out.print(sb.toString());
2529        }
2530
2531        out.flush();
2532
2533        return UNDEFINED;
2534    }
2535
2536    private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
2537        try {
2538            // Assuming class name pattern for built-in JS constructors.
2539            final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
2540
2541            sb.append("Native");
2542            sb.append(name);
2543            sb.append("$Constructor");
2544
2545            final Class<?> funcClass = Class.forName(sb.toString());
2546            final T res = clazz.cast(funcClass.newInstance());
2547
2548            if (res instanceof ScriptFunction) {
2549                // All global constructor prototypes are not-writable,
2550                // not-enumerable and not-configurable.
2551                final ScriptFunction func = (ScriptFunction)res;
2552                func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
2553            }
2554
2555            if (res.getProto() == null) {
2556                res.setInitialProto(getObjectPrototype());
2557            }
2558
2559            res.setIsBuiltin();
2560
2561            return res;
2562        } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
2563            throw new RuntimeException(e);
2564        }
2565    }
2566
2567    private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) {
2568        final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>();
2569
2570        list.addAll(Arrays.asList(func.getMap().getProperties()));
2571
2572        if (func instanceof ScriptFunction) {
2573            final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func);
2574            if (proto != null) {
2575                list.addAll(Arrays.asList(proto.getMap().getProperties()));
2576            }
2577        }
2578
2579        final jdk.nashorn.internal.runtime.Property prop = getProperty(name);
2580        if (prop != null) {
2581            list.add(prop);
2582        }
2583
2584        return list;
2585    }
2586
2587    /**
2588     * Given a builtin object, traverse its properties recursively and associate them with a name that
2589     * will be a key to their invalidation switchpoint.
2590     * @param name name for key
2591     * @param func builtin script object
2592     */
2593    private void tagBuiltinProperties(final String name, final ScriptObject func) {
2594        SwitchPoint sp = context.getBuiltinSwitchPoint(name);
2595        if (sp == null) {
2596            sp = context.newBuiltinSwitchPoint(name);
2597        }
2598
2599        //get all builtin properties in this builtin object and register switchpoints keyed on the propery name,
2600        //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc
2601        for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) {
2602            prop.setBuiltinSwitchPoint(sp);
2603        }
2604    }
2605
2606    // Function and Object constructors are inter-dependent. Also,
2607    // Function.prototype
2608    // functions are not properly initialized. We fix the references here.
2609    // NOTE: be careful if you want to re-order the operations here. You may
2610    // have
2611    // to play with object references carefully!!
2612    private void initFunctionAndObject() {
2613        // First-n-foremost is Function
2614
2615        this.builtinFunction = initConstructor("Function", ScriptFunction.class);
2616
2617        // create global anonymous function
2618        final ScriptFunction anon = ScriptFunction.createAnonymous();
2619        // need to copy over members of Function.prototype to anon function
2620        anon.addBoundProperties(getFunctionPrototype());
2621
2622        // Function.prototype === Object.getPrototypeOf(Function) ===
2623        // <anon-function>
2624        builtinFunction.setInitialProto(anon);
2625        builtinFunction.setPrototype(anon);
2626        anon.set("constructor", builtinFunction, 0);
2627        anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
2628
2629        // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
2630        this.typeErrorThrower = ScriptFunction.createBuiltin("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER);
2631        typeErrorThrower.preventExtensions();
2632
2633        // now initialize Object
2634        this.builtinObject = initConstructor("Object", ScriptFunction.class);
2635        final ScriptObject ObjectPrototype = getObjectPrototype();
2636        // Object.getPrototypeOf(Function.prototype) === Object.prototype
2637        anon.setInitialProto(ObjectPrototype);
2638
2639        // ES6 draft compliant __proto__ property of Object.prototype
2640        // accessors on Object.prototype for "__proto__"
2641        final ScriptFunction getProto = ScriptFunction.createBuiltin("getProto", NativeObject.GET__PROTO__);
2642        final ScriptFunction setProto = ScriptFunction.createBuiltin("setProto", NativeObject.SET__PROTO__);
2643        ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
2644
2645        // Function valued properties of Function.prototype were not properly
2646        // initialized. Because, these were created before global.function and
2647        // global.object were not initialized.
2648        jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
2649        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2650            final Object key = property.getKey();
2651            final Object value = builtinFunction.get(key);
2652
2653            if (value instanceof ScriptFunction && value != anon) {
2654                final ScriptFunction func = (ScriptFunction)value;
2655                func.setInitialProto(getFunctionPrototype());
2656                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2657                if (prototype != null) {
2658                    prototype.setInitialProto(ObjectPrototype);
2659                }
2660            }
2661        }
2662
2663        // For function valued properties of Object and Object.prototype, make
2664        // sure prototype's proto chain ends with Object.prototype
2665        for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
2666            final Object key = property.getKey();
2667            final Object value = builtinObject.get(key);
2668
2669            if (value instanceof ScriptFunction) {
2670                final ScriptFunction func = (ScriptFunction)value;
2671                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2672                if (prototype != null) {
2673                    prototype.setInitialProto(ObjectPrototype);
2674                }
2675            }
2676        }
2677
2678        properties = getObjectPrototype().getMap().getProperties();
2679
2680        for (final jdk.nashorn.internal.runtime.Property property : properties) {
2681            final Object key   = property.getKey();
2682            if (key.equals("constructor")) {
2683                continue;
2684            }
2685
2686            final Object value = ObjectPrototype.get(key);
2687            if (value instanceof ScriptFunction) {
2688                final ScriptFunction func = (ScriptFunction)value;
2689                final ScriptObject prototype = ScriptFunction.getPrototype(func);
2690                if (prototype != null) {
2691                    prototype.setInitialProto(ObjectPrototype);
2692                }
2693            }
2694        }
2695
2696        tagBuiltinProperties("Object", builtinObject);
2697        tagBuiltinProperties("Function", builtinFunction);
2698        tagBuiltinProperties("Function", anon);
2699    }
2700
2701    private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
2702        return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
2703    }
2704
2705    RegExpResult getLastRegExpResult() {
2706        return lastRegExpResult;
2707    }
2708
2709    void setLastRegExpResult(final RegExpResult regExpResult) {
2710        this.lastRegExpResult = regExpResult;
2711    }
2712
2713    @Override
2714    protected boolean isGlobal() {
2715        return true;
2716    }
2717
2718    /**
2719     * A class representing the ES6 global lexical scope.
2720     */
2721    private static class LexicalScope extends ScriptObject {
2722
2723        LexicalScope(final Global global) {
2724            super(global, PropertyMap.newMap());
2725        }
2726
2727        @Override
2728        protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2729            return filterInvocation(super.findGetMethod(desc, request, operator));
2730        }
2731
2732        @Override
2733        protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2734            return filterInvocation(super.findSetMethod(desc, request));
2735        }
2736
2737        @Override
2738        protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property, final boolean extensible) {
2739            // We override this method just to make it callable by Global
2740            return super.addBoundProperty(propMap, source, property, extensible);
2741        }
2742
2743        private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) {
2744            final MethodType type = invocation.getInvocation().type();
2745            return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER);
2746        }
2747    }
2748
2749}
2750