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
26 package jdk.nashorn.internal.objects;
27
28 import static jdk.nashorn.internal.lookup.Lookup.MH;
29 import static jdk.nashorn.internal.runtime.ECMAErrors.referenceError;
30 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
31 import static jdk.nashorn.internal.runtime.JSType.isString;
32 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
33
34 import java.io.IOException;
35 import java.io.PrintWriter;
36 import java.lang.invoke.MethodHandle;
37 import java.lang.invoke.MethodHandles;
38 import java.lang.invoke.MethodType;
39 import java.lang.invoke.SwitchPoint;
40 import java.lang.reflect.Field;
41 import java.util.ArrayList;
42 import java.util.Arrays;
43 import java.util.List;
44 import java.util.Map;
45 import java.util.Objects;
46 import java.util.concurrent.Callable;
47 import java.util.concurrent.ConcurrentHashMap;
48 import javax.script.ScriptContext;
49 import javax.script.ScriptEngine;
50 import jdk.internal.dynalink.CallSiteDescriptor;
51 import jdk.internal.dynalink.linker.GuardedInvocation;
52 import jdk.internal.dynalink.linker.LinkRequest;
53 import jdk.nashorn.api.scripting.ClassFilter;
54 import jdk.nashorn.api.scripting.ScriptObjectMirror;
55 import jdk.nashorn.internal.lookup.Lookup;
56 import jdk.nashorn.internal.objects.annotations.Attribute;
57 import jdk.nashorn.internal.objects.annotations.Property;
58 import jdk.nashorn.internal.objects.annotations.ScriptClass;
59 import jdk.nashorn.internal.runtime.Context;
60 import jdk.nashorn.internal.runtime.ECMAErrors;
61 import jdk.nashorn.internal.runtime.GlobalConstants;
62 import jdk.nashorn.internal.runtime.GlobalFunctions;
63 import jdk.nashorn.internal.runtime.JSType;
64 import jdk.nashorn.internal.runtime.NativeJavaPackage;
65 import jdk.nashorn.internal.runtime.PropertyDescriptor;
66 import jdk.nashorn.internal.runtime.PropertyMap;
67 import jdk.nashorn.internal.runtime.Scope;
68 import jdk.nashorn.internal.runtime.ScriptEnvironment;
69 import jdk.nashorn.internal.runtime.ScriptFunction;
70 import jdk.nashorn.internal.runtime.ScriptObject;
71 import jdk.nashorn.internal.runtime.ScriptRuntime;
72 import jdk.nashorn.internal.runtime.ScriptingFunctions;
73 import jdk.nashorn.internal.runtime.Specialization;
74 import jdk.nashorn.internal.runtime.arrays.ArrayData;
75 import jdk.nashorn.internal.runtime.linker.Bootstrap;
76 import jdk.nashorn.internal.runtime.linker.InvokeByName;
77 import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor;
78 import jdk.nashorn.internal.runtime.regexp.RegExpResult;
79 import jdk.nashorn.internal.scripts.JO;
80
81 /**
82 * Representation of global scope.
83 */
84 @ScriptClass("Global")
85 public final class Global extends ScriptObject implements Scope {
86 // Placeholder value used in place of a location property (__FILE__, __DIR__, __LINE__)
87 private static final Object LOCATION_PROPERTY_PLACEHOLDER = new Object();
88 private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
89 private final InvokeByName VALUE_OF = new InvokeByName("valueOf", ScriptObject.class);
90
91 /**
92 * Optimistic builtin names that require switchpoint invalidation
93 * upon assignment. Overly conservative, but works for now, to avoid
94 * any complicated scope checks and especially heavy weight guards
95 * like
96 *
97 * <pre>
98 * public boolean setterGuard(final Object receiver) {
99 * final Global global = Global.instance();
100 * final ScriptObject sobj = global.getFunctionPrototype();
101 * final Object apply = sobj.get("apply");
102 * return apply == receiver;
103 * }
104 * </pre>
105 *
106 * Naturally, checking for builtin classes like NativeFunction is cheaper,
107 * it's when you start adding property checks for said builtins you have
108 * problems with guard speed.
109 */
110
111 /** Nashorn extension: arguments array */
112 @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_CONFIGURABLE)
113 public Object arguments;
114
115 /** ECMA 15.1.2.2 parseInt (string , radix) */
116 @Property(attributes = Attribute.NOT_ENUMERABLE)
117 public Object parseInt;
118
119 /** ECMA 15.1.2.3 parseFloat (string) */
120 @Property(attributes = Attribute.NOT_ENUMERABLE)
121 public Object parseFloat;
122
123 /** ECMA 15.1.2.4 isNaN (number) */
124 @Property(attributes = Attribute.NOT_ENUMERABLE)
125 public Object isNaN;
126
127 /** ECMA 15.1.2.5 isFinite (number) */
128 @Property(attributes = Attribute.NOT_ENUMERABLE)
129 public Object isFinite;
130
131 /** ECMA 15.1.3.3 encodeURI */
132 @Property(attributes = Attribute.NOT_ENUMERABLE)
133 public Object encodeURI;
134
135 /** ECMA 15.1.3.4 encodeURIComponent */
136 @Property(attributes = Attribute.NOT_ENUMERABLE)
137 public Object encodeURIComponent;
138
139 /** ECMA 15.1.3.1 decodeURI */
140 @Property(attributes = Attribute.NOT_ENUMERABLE)
141 public Object decodeURI;
142
143 /** ECMA 15.1.3.2 decodeURIComponent */
144 @Property(attributes = Attribute.NOT_ENUMERABLE)
145 public Object decodeURIComponent;
146
147 /** ECMA B.2.1 escape (string) */
148 @Property(attributes = Attribute.NOT_ENUMERABLE)
149 public Object escape;
150
151 /** ECMA B.2.2 unescape (string) */
152 @Property(attributes = Attribute.NOT_ENUMERABLE)
153 public Object unescape;
154
155 /** Nashorn extension: global.print */
156 @Property(attributes = Attribute.NOT_ENUMERABLE)
157 public Object print;
158
159 /** Nashorn extension: global.load */
160 @Property(attributes = Attribute.NOT_ENUMERABLE)
161 public Object load;
162
163 /** Nashorn extension: global.loadWithNewGlobal */
164 @Property(attributes = Attribute.NOT_ENUMERABLE)
165 public Object loadWithNewGlobal;
166
167 /** Nashorn extension: global.exit */
168 @Property(attributes = Attribute.NOT_ENUMERABLE)
169 public Object exit;
170
171 /** Nashorn extension: global.quit */
172 @Property(attributes = Attribute.NOT_ENUMERABLE)
173 public Object quit;
174
175 /** Value property NaN of the Global Object - ECMA 15.1.1.1 NaN */
176 @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
177 public final double NaN = Double.NaN;
178
179 /** Value property Infinity of the Global Object - ECMA 15.1.1.2 Infinity */
180 @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
181 public final double Infinity = Double.POSITIVE_INFINITY;
182
183 /** Value property Undefined of the Global Object - ECMA 15.1.1.3 Undefined */
184 @Property(attributes = Attribute.NON_ENUMERABLE_CONSTANT)
185 public final Object undefined = UNDEFINED;
186
187 /** ECMA 15.1.2.1 eval(x) */
188 @Property(attributes = Attribute.NOT_ENUMERABLE)
189 public Object eval;
190
191 /** ECMA 15.1.4.1 Object constructor. */
192 @Property(name = "Object", attributes = Attribute.NOT_ENUMERABLE)
193 public volatile Object object;
194
195 /** ECMA 15.1.4.2 Function constructor. */
196 @Property(name = "Function", attributes = Attribute.NOT_ENUMERABLE)
197 public volatile Object function;
198
199 /** ECMA 15.1.4.3 Array constructor. */
200 @Property(name = "Array", attributes = Attribute.NOT_ENUMERABLE)
201 public volatile Object array;
202
203 /** ECMA 15.1.4.4 String constructor */
204 @Property(name = "String", attributes = Attribute.NOT_ENUMERABLE)
205 public volatile Object string;
206
207 /** ECMA 15.1.4.5 Boolean constructor */
208 @Property(name = "Boolean", attributes = Attribute.NOT_ENUMERABLE)
209 public volatile Object _boolean;
210
211 /** ECMA 15.1.4.6 - Number constructor */
212 @Property(name = "Number", attributes = Attribute.NOT_ENUMERABLE)
213 public volatile Object number;
214
215 /** ECMA 15.1.4.7 Date constructor */
216 @Property(name = "Date", attributes = Attribute.NOT_ENUMERABLE)
217 public volatile Object date;
218
219 /** ECMA 15.1.4.8 RegExp constructor */
220 @Property(name = "RegExp", attributes = Attribute.NOT_ENUMERABLE)
221 public volatile Object regexp;
222
223 /** ECMA 15.12 - The JSON object */
224 @Property(name = "JSON", attributes = Attribute.NOT_ENUMERABLE)
225 public volatile Object json;
226
227 /** Nashorn extension: global.JSAdapter */
228 @Property(name = "JSAdapter", attributes = Attribute.NOT_ENUMERABLE)
229 public volatile Object jsadapter;
230
231 /** ECMA 15.8 - The Math object */
232 @Property(name = "Math", attributes = Attribute.NOT_ENUMERABLE)
233 public volatile Object math;
234
235 /** Error object */
236 @Property(name = "Error", attributes = Attribute.NOT_ENUMERABLE)
237 public volatile Object error;
238
239 /** EvalError object */
240 @Property(name = "EvalError", attributes = Attribute.NOT_ENUMERABLE)
241 public volatile Object evalError;
242
243 /** RangeError object */
244 @Property(name = "RangeError", attributes = Attribute.NOT_ENUMERABLE)
245 public volatile Object rangeError;
246
247 /** ReferenceError object */
248 @Property(name = "ReferenceError", attributes = Attribute.NOT_ENUMERABLE)
249 public volatile Object referenceError;
250
251 /** SyntaxError object */
252 @Property(name = "SyntaxError", attributes = Attribute.NOT_ENUMERABLE)
253 public volatile Object syntaxError;
254
255 /** TypeError object */
256 @Property(name = "TypeError", attributes = Attribute.NOT_ENUMERABLE)
257 public volatile Object typeError;
258
259 /** URIError object */
260 @Property(name = "URIError", attributes = Attribute.NOT_ENUMERABLE)
261 public volatile Object uriError;
262
263 /** ArrayBuffer object */
264 @Property(name = "ArrayBuffer", attributes = Attribute.NOT_ENUMERABLE)
265 public volatile Object arrayBuffer;
266
267 /** DataView object */
268 @Property(name = "DataView", attributes = Attribute.NOT_ENUMERABLE)
269 public volatile Object dataView;
270
271 /** TypedArray (int8) */
272 @Property(name = "Int8Array", attributes = Attribute.NOT_ENUMERABLE)
273 public volatile Object int8Array;
274
275 /** TypedArray (uint8) */
276 @Property(name = "Uint8Array", attributes = Attribute.NOT_ENUMERABLE)
277 public volatile Object uint8Array;
278
279 /** TypedArray (uint8) - Clamped */
280 @Property(name = "Uint8ClampedArray", attributes = Attribute.NOT_ENUMERABLE)
281 public volatile Object uint8ClampedArray;
282
283 /** TypedArray (int16) */
284 @Property(name = "Int16Array", attributes = Attribute.NOT_ENUMERABLE)
285 public volatile Object int16Array;
286
287 /** TypedArray (uint16) */
288 @Property(name = "Uint16Array", attributes = Attribute.NOT_ENUMERABLE)
289 public volatile Object uint16Array;
290
291 /** TypedArray (int32) */
292 @Property(name = "Int32Array", attributes = Attribute.NOT_ENUMERABLE)
293 public volatile Object int32Array;
294
295 /** TypedArray (uint32) */
296 @Property(name = "Uint32Array", attributes = Attribute.NOT_ENUMERABLE)
297 public volatile Object uint32Array;
298
299 /** TypedArray (float32) */
300 @Property(name = "Float32Array", attributes = Attribute.NOT_ENUMERABLE)
301 public volatile Object float32Array;
302
303 /** TypedArray (float64) */
304 @Property(name = "Float64Array", attributes = Attribute.NOT_ENUMERABLE)
305 public volatile Object float64Array;
306
307 /** Nashorn extension: Java access - global.Packages */
308 @Property(name = "Packages", attributes = Attribute.NOT_ENUMERABLE)
309 public volatile Object packages;
310
311 /** Nashorn extension: Java access - global.com */
312 @Property(attributes = Attribute.NOT_ENUMERABLE)
313 public volatile Object com;
314
315 /** Nashorn extension: Java access - global.edu */
316 @Property(attributes = Attribute.NOT_ENUMERABLE)
317 public volatile Object edu;
318
319 /** Nashorn extension: Java access - global.java */
320 @Property(attributes = Attribute.NOT_ENUMERABLE)
321 public volatile Object java;
322
323 /** Nashorn extension: Java access - global.javafx */
324 @Property(attributes = Attribute.NOT_ENUMERABLE)
325 public volatile Object javafx;
326
327 /** Nashorn extension: Java access - global.javax */
328 @Property(attributes = Attribute.NOT_ENUMERABLE)
329 public volatile Object javax;
330
331 /** Nashorn extension: Java access - global.org */
332 @Property(attributes = Attribute.NOT_ENUMERABLE)
333 public volatile Object org;
334
335 /** Nashorn extension: Java access - global.javaImporter */
336 @Property(name = "JavaImporter", attributes = Attribute.NOT_ENUMERABLE)
337 public volatile Object javaImporter;
338
339 /** Nashorn extension: global.Java Object constructor. */
340 @Property(name = "Java", attributes = Attribute.NOT_ENUMERABLE)
341 public volatile Object javaApi;
342
343 /** Nashorn extension: current script's file name */
344 @Property(name = "__FILE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
345 public final Object __FILE__ = LOCATION_PROPERTY_PLACEHOLDER;
346
347 /** Nashorn extension: current script's directory */
348 @Property(name = "__DIR__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
349 public final Object __DIR__ = LOCATION_PROPERTY_PLACEHOLDER;
350
351 /** Nashorn extension: current source line number being executed */
352 @Property(name = "__LINE__", attributes = Attribute.NON_ENUMERABLE_CONSTANT)
353 public final Object __LINE__ = LOCATION_PROPERTY_PLACEHOLDER;
354
355 /** Used as Date.prototype's default value */
356 public NativeDate DEFAULT_DATE;
357
358 /** Used as RegExp.prototype's default value */
359 public NativeRegExp DEFAULT_REGEXP;
360
361 /*
362 * Built-in constructor objects: Even if user changes dynamic values of
363 * "Object", "Array" etc., we still want to keep original values of these
364 * constructors here. For example, we need to be able to create array,
365 * regexp literals even after user overwrites global "Array" or "RegExp"
366 * constructor - see also ECMA 262 spec. Annex D.
367 */
368 private ScriptFunction builtinFunction;
369 private ScriptFunction builtinObject;
370 private ScriptFunction builtinArray;
371 private ScriptFunction builtinBoolean;
372 private ScriptFunction builtinDate;
373 private ScriptObject builtinJSON;
374 private ScriptFunction builtinJSAdapter;
375 private ScriptObject builtinMath;
376 private ScriptFunction builtinNumber;
377 private ScriptFunction builtinRegExp;
378 private ScriptFunction builtinString;
379 private ScriptFunction builtinError;
380 private ScriptFunction builtinEval;
381 private ScriptFunction builtinEvalError;
382 private ScriptFunction builtinRangeError;
383 private ScriptFunction builtinReferenceError;
384 private ScriptFunction builtinSyntaxError;
385 private ScriptFunction builtinTypeError;
386 private ScriptFunction builtinURIError;
387 private ScriptObject builtinPackages;
388 private ScriptObject builtinCom;
389 private ScriptObject builtinEdu;
390 private ScriptObject builtinJava;
391 private ScriptObject builtinJavafx;
392 private ScriptObject builtinJavax;
393 private ScriptObject builtinOrg;
394 private ScriptFunction builtinJavaImporter;
395 private ScriptObject builtinJavaApi;
396 private ScriptFunction builtinArrayBuffer;
397 private ScriptFunction builtinDataView;
398 private ScriptFunction builtinInt8Array;
399 private ScriptFunction builtinUint8Array;
400 private ScriptFunction builtinUint8ClampedArray;
401 private ScriptFunction builtinInt16Array;
402 private ScriptFunction builtinUint16Array;
403 private ScriptFunction builtinInt32Array;
404 private ScriptFunction builtinUint32Array;
405 private ScriptFunction builtinFloat32Array;
406 private ScriptFunction builtinFloat64Array;
407
408 /*
409 * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
410 */
411 private ScriptFunction typeErrorThrower;
412
413 // Flag to indicate that a split method issued a return statement
414 private int splitState = -1;
415
416 // Used to store the last RegExp result to support deprecated RegExp constructor properties
417 private RegExpResult lastRegExpResult;
418
419 private static final MethodHandle EVAL = findOwnMH_S("eval", Object.class, Object.class, Object.class);
420 private static final MethodHandle NO_SUCH_PROPERTY = findOwnMH_S(NO_SUCH_PROPERTY_NAME, Object.class, Object.class, Object.class);
421 private static final MethodHandle PRINT = findOwnMH_S("print", Object.class, Object.class, Object[].class);
422 private static final MethodHandle PRINTLN = findOwnMH_S("println", Object.class, Object.class, Object[].class);
423 private static final MethodHandle LOAD = findOwnMH_S("load", Object.class, Object.class, Object.class);
424 private static final MethodHandle LOAD_WITH_NEW_GLOBAL = findOwnMH_S("loadWithNewGlobal", Object.class, Object.class, Object[].class);
425 private static final MethodHandle EXIT = findOwnMH_S("exit", Object.class, Object.class, Object.class);
426 private static final MethodHandle LEXICAL_SCOPE_FILTER = findOwnMH_S("lexicalScopeFilter", Object.class, Object.class);
427
428 // initialized by nasgen
429 private static PropertyMap $nasgenmap$;
430
431 // context to which this global belongs to
432 private final Context context;
433
434 // current ScriptContext to use - can be null.
435 private ScriptContext scontext;
436 // current ScriptEngine associated - can be null.
437 private ScriptEngine engine;
438
439 // ES6 global lexical scope.
440 private final LexicalScope lexicalScope;
441
442 // Switchpoint for non-constant global callsites in the presence of ES6 lexical scope.
443 private SwitchPoint lexicalScopeSwitchPoint;
444
445 /**
446 * Set the current script context
447 * @param scontext script context
448 */
449 public void setScriptContext(final ScriptContext scontext) {
450 this.scontext = scontext;
451 }
452
453 @Override
454 protected Context getContext() {
455 return context;
456 }
457
458 // performs initialization checks for Global constructor and returns the
459 // PropertyMap, if everything is fine.
460 private static PropertyMap checkAndGetMap(final Context context) {
461 // security check first
462 final SecurityManager sm = System.getSecurityManager();
463 if (sm != null) {
464 sm.checkPermission(new RuntimePermission(Context.NASHORN_CREATE_GLOBAL));
465 }
466
467 Objects.requireNonNull(context);
468
469 return $nasgenmap$;
470 }
471
472 /**
473 * Constructor
474 *
475 * @param context the context
476 */
477 public Global(final Context context) {
478 super(checkAndGetMap(context));
479 this.context = context;
480 this.setIsScope();
481 this.lexicalScope = context.getEnv()._es6 ? new LexicalScope(this) : null;
482 }
483
484 /**
485 * Script access to "current" Global instance
486 *
487 * @return the global singleton
488 */
489 public static Global instance() {
490 final Global global = Context.getGlobal();
491 Objects.requireNonNull(global);
492 return global;
493 }
494
495 private static Global instanceFrom(final Object self) {
496 return self instanceof Global? (Global)self : instance();
497 }
498
499 /**
500 * Check if we have a Global instance
501 * @return true if one exists
502 */
503 public static boolean hasInstance() {
504 return Context.getGlobal() != null;
505 }
506
507 /**
508 * Script access to {@link ScriptEnvironment}
509 *
510 * @return the script environment
511 */
512 static ScriptEnvironment getEnv() {
513 return instance().getContext().getEnv();
514 }
515
516 /**
517 * Script access to {@link Context}
518 *
519 * @return the context
520 */
521 static Context getThisContext() {
522 return instance().getContext();
523 }
524
525 // Runtime interface to Global
526
527 /**
528 * Is there a class filter in the current Context?
529 * @return class filter
530 */
531 public ClassFilter getClassFilter() {
532 return context.getClassFilter();
533 }
534
535 /**
536 * Is this global of the given Context?
537 * @param ctxt the context
538 * @return true if this global belongs to the given Context
539 */
540 public boolean isOfContext(final Context ctxt) {
541 return this.context == ctxt;
542 }
543
544 /**
545 * Does this global belong to a strict Context?
546 * @return true if this global belongs to a strict Context
547 */
548 public boolean isStrictContext() {
549 return context.getEnv()._strict;
550 }
551
552 /**
553 * Initialize standard builtin objects like "Object", "Array", "Function" etc.
554 * as well as our extension builtin objects like "Java", "JSAdapter" as properties
555 * of the global scope object.
556 *
557 * @param engine ScriptEngine to initialize
558 */
559 @SuppressWarnings("hiding")
560 public void initBuiltinObjects(final ScriptEngine engine) {
561 if (this.builtinObject != null) {
562 // already initialized, just return
563 return;
564 }
565
566 this.engine = engine;
567 init(engine);
568 }
569
570 /**
571 * Wrap a Java object as corresponding script object
572 *
573 * @param obj object to wrap
574 * @return wrapped object
575 */
576 public Object wrapAsObject(final Object obj) {
577 if (obj instanceof Boolean) {
578 return new NativeBoolean((Boolean)obj, this);
579 } else if (obj instanceof Number) {
580 return new NativeNumber(((Number)obj).doubleValue(), this);
581 } else if (isString(obj)) {
582 return new NativeString((CharSequence)obj, this);
583 } else if (obj instanceof Object[]) { // extension
584 return new NativeArray(ArrayData.allocate((Object[])obj), this);
585 } else if (obj instanceof double[]) { // extension
586 return new NativeArray(ArrayData.allocate((double[])obj), this);
587 } else if (obj instanceof long[]) {
588 return new NativeArray(ArrayData.allocate((long[])obj), this);
589 } else if (obj instanceof int[]) {
590 return new NativeArray(ArrayData.allocate((int[]) obj), this);
591 } else if (obj instanceof ArrayData) {
592 return new NativeArray((ArrayData) obj, this);
593 } else {
594 // FIXME: more special cases? Map? List?
595 return obj;
596 }
597 }
598
599 /**
600 * Lookup helper for JS primitive types
601 *
602 * @param request the link request for the dynamic call site.
603 * @param self self reference
604 *
605 * @return guarded invocation
606 */
607 public static GuardedInvocation primitiveLookup(final LinkRequest request, final Object self) {
608 if (isString(self)) {
609 return NativeString.lookupPrimitive(request, self);
610 } else if (self instanceof Number) {
611 return NativeNumber.lookupPrimitive(request, self);
612 } else if (self instanceof Boolean) {
613 return NativeBoolean.lookupPrimitive(request, self);
614 }
615 throw new IllegalArgumentException("Unsupported primitive: " + self);
616 }
617
618 /**
619 * Returns a method handle that creates a wrapper object for a JS primitive value.
620 *
621 * @param self receiver object
622 * @return method handle to create wrapper objects for primitive receiver
623 */
624 public static MethodHandle getPrimitiveWrapFilter(final Object self) {
625 if (isString(self)) {
626 return NativeString.WRAPFILTER;
627 } else if (self instanceof Number) {
628 return NativeNumber.WRAPFILTER;
629 } else if (self instanceof Boolean) {
630 return NativeBoolean.WRAPFILTER;
631 }
632 throw new IllegalArgumentException("Unsupported primitive: " + self);
633 }
634
635
636 /**
637 * Create a new empty script object
638 *
639 * @return the new ScriptObject
640 */
641 public ScriptObject newObject() {
642 return new JO(getObjectPrototype(), JO.getInitialMap());
643 }
644
645 /**
646 * Default value of given type
647 *
648 * @param sobj script object
649 * @param typeHint type hint
650 *
651 * @return default value
652 */
653 public Object getDefaultValue(final ScriptObject sobj, final Class<?> typeHint) {
654 // When the [[DefaultValue]] internal method of O is called with no hint,
655 // then it behaves as if the hint were Number, unless O is a Date object
656 // in which case it behaves as if the hint were String.
657 Class<?> hint = typeHint;
658 if (hint == null) {
659 hint = Number.class;
660 }
661
662 try {
663 if (hint == String.class) {
664
665 final Object toString = TO_STRING.getGetter().invokeExact(sobj);
666
667 if (Bootstrap.isCallable(toString)) {
668 final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
669 if (JSType.isPrimitive(value)) {
670 return value;
671 }
672 }
673
674 final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
675 if (Bootstrap.isCallable(valueOf)) {
676 final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
677 if (JSType.isPrimitive(value)) {
678 return value;
679 }
680 }
681 throw typeError(this, "cannot.get.default.string");
682 }
683
684 if (hint == Number.class) {
685 final Object valueOf = VALUE_OF.getGetter().invokeExact(sobj);
686 if (Bootstrap.isCallable(valueOf)) {
687 final Object value = VALUE_OF.getInvoker().invokeExact(valueOf, sobj);
688 if (JSType.isPrimitive(value)) {
689 return value;
690 }
691 }
692
693 final Object toString = TO_STRING.getGetter().invokeExact(sobj);
694 if (Bootstrap.isCallable(toString)) {
695 final Object value = TO_STRING.getInvoker().invokeExact(toString, sobj);
696 if (JSType.isPrimitive(value)) {
697 return value;
698 }
699 }
700
701 throw typeError(this, "cannot.get.default.number");
702 }
703 } catch (final RuntimeException | Error e) {
704 throw e;
705 } catch (final Throwable t) {
706 throw new RuntimeException(t);
707 }
708
709 return UNDEFINED;
710 }
711
712 /**
713 * Is the given ScriptObject an ECMAScript Error object?
714 *
715 * @param sobj the object being checked
716 * @return true if sobj is an Error object
717 */
718 public boolean isError(final ScriptObject sobj) {
719 final ScriptObject errorProto = getErrorPrototype();
720 ScriptObject proto = sobj.getProto();
721 while (proto != null) {
722 if (proto == errorProto) {
723 return true;
724 }
725 proto = proto.getProto();
726 }
727 return false;
728 }
729
730 /**
731 * Create a new ECMAScript Error object.
732 *
733 * @param msg error message
734 * @return newly created Error object
735 */
736 public ScriptObject newError(final String msg) {
737 return new NativeError(msg, this);
738 }
739
740 /**
741 * Create a new ECMAScript EvalError object.
742 *
743 * @param msg error message
744 * @return newly created EvalError object
745 */
746 public ScriptObject newEvalError(final String msg) {
747 return new NativeEvalError(msg, this);
748 }
749
750 /**
751 * Create a new ECMAScript RangeError object.
752 *
753 * @param msg error message
754 * @return newly created RangeError object
755 */
756 public ScriptObject newRangeError(final String msg) {
757 return new NativeRangeError(msg, this);
758 }
759
760 /**
761 * Create a new ECMAScript ReferenceError object.
762 *
763 * @param msg error message
764 * @return newly created ReferenceError object
765 */
766 public ScriptObject newReferenceError(final String msg) {
767 return new NativeReferenceError(msg, this);
768 }
769
770 /**
771 * Create a new ECMAScript SyntaxError object.
772 *
773 * @param msg error message
774 * @return newly created SyntaxError object
775 */
776 public ScriptObject newSyntaxError(final String msg) {
777 return new NativeSyntaxError(msg, this);
778 }
779
780 /**
781 * Create a new ECMAScript TypeError object.
782 *
783 * @param msg error message
784 * @return newly created TypeError object
785 */
786 public ScriptObject newTypeError(final String msg) {
787 return new NativeTypeError(msg, this);
788 }
789
790 /**
791 * Create a new ECMAScript URIError object.
792 *
793 * @param msg error message
794 * @return newly created URIError object
795 */
796 public ScriptObject newURIError(final String msg) {
797 return new NativeURIError(msg, this);
798 }
799
800 /**
801 * Create a new ECMAScript GenericDescriptor object.
802 *
803 * @param configurable is the property configurable?
804 * @param enumerable is the property enumerable?
805 * @return newly created GenericDescriptor object
806 */
807 public PropertyDescriptor newGenericDescriptor(final boolean configurable, final boolean enumerable) {
808 return new GenericPropertyDescriptor(configurable, enumerable, this);
809 }
810
811 /**
812 * Create a new ECMAScript DatePropertyDescriptor object.
813 *
814 * @param value of the data property
815 * @param configurable is the property configurable?
816 * @param enumerable is the property enumerable?
817 * @param writable is the property writable?
818 * @return newly created DataPropertyDescriptor object
819 */
820 public PropertyDescriptor newDataDescriptor(final Object value, final boolean configurable, final boolean enumerable, final boolean writable) {
821 return new DataPropertyDescriptor(configurable, enumerable, writable, value, this);
822 }
823
824 /**
825 * Create a new ECMAScript AccessorPropertyDescriptor object.
826 *
827 * @param get getter function of the user accessor property
828 * @param set setter function of the user accessor property
829 * @param configurable is the property configurable?
830 * @param enumerable is the property enumerable?
831 * @return newly created AccessorPropertyDescriptor object
832 */
833 public PropertyDescriptor newAccessorDescriptor(final Object get, final Object set, final boolean configurable, final boolean enumerable) {
834 final AccessorPropertyDescriptor desc = new AccessorPropertyDescriptor(configurable, enumerable, get == null ? UNDEFINED : get, set == null ? UNDEFINED : set, this);
835
836 if (get == null) {
837 desc.delete(PropertyDescriptor.GET, false);
838 }
839
840 if (set == null) {
841 desc.delete(PropertyDescriptor.SET, false);
842 }
843
844 return desc;
845 }
846
847 private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
848 final T obj = map.get(key);
849 if (obj != null) {
850 return obj;
851 }
852
853 try {
854 final T newObj = creator.call();
855 final T existingObj = map.putIfAbsent(key, newObj);
856 return existingObj != null ? existingObj : newObj;
857 } catch (final Exception exp) {
858 throw new RuntimeException(exp);
859 }
860 }
861
862 private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
863
864
865 /**
866 * Get cached InvokeByName object for the given key
867 * @param key key to be associated with InvokeByName object
868 * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
869 * @return InvokeByName object associated with the key.
870 */
871 public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
872 return getLazilyCreatedValue(key, creator, namedInvokers);
873 }
874
875 private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
876
877 /**
878 * Get cached dynamic method handle for the given key
879 * @param key key to be associated with dynamic method handle
880 * @param creator if method handle is absent 'creator' is called to make one (lazy init)
881 * @return dynamic method handle associated with the key.
882 */
883 public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
884 return getLazilyCreatedValue(key, creator, dynamicInvokers);
885 }
886
887 /**
888 * Hook to search missing variables in ScriptContext if available
889 * @param self used to detect if scope call or not (this function is 'strict')
890 * @param name name of the variable missing
891 * @return value of the missing variable or undefined (or TypeError for scope search)
892 */
893 public static Object __noSuchProperty__(final Object self, final Object name) {
894 final Global global = Global.instance();
895 final ScriptContext sctxt = global.scontext;
896 final String nameStr = name.toString();
897
898 if (sctxt != null) {
899 final int scope = sctxt.getAttributesScope(nameStr);
900 if (scope != -1) {
901 return ScriptObjectMirror.unwrap(sctxt.getAttribute(nameStr, scope), global);
902 }
903 }
904
905 switch (nameStr) {
906 case "context":
907 return sctxt;
908 case "engine":
909 return global.engine;
910 default:
911 break;
912 }
913
914 if (self == UNDEFINED) {
915 // scope access and so throw ReferenceError
916 throw referenceError(global, "not.defined", nameStr);
917 }
918
919 return UNDEFINED;
920 }
921
922 /**
923 * This is the eval used when 'indirect' eval call is made.
924 *
925 * var global = this;
926 * global.eval("print('hello')");
927 *
928 * @param self eval scope
929 * @param str eval string
930 *
931 * @return the result of eval
932 */
933 public static Object eval(final Object self, final Object str) {
934 return directEval(self, str, UNDEFINED, UNDEFINED, false);
935 }
936
937 /**
938 * Direct eval
939 *
940 * @param self The scope of eval passed as 'self'
941 * @param str Evaluated code
942 * @param callThis "this" to be passed to the evaluated code
943 * @param location location of the eval call
944 * @param strict is eval called a strict mode code?
945 *
946 * @return the return value of the eval
947 *
948 * This is directly invoked from generated when eval(code) is called in user code
949 */
950 public static Object directEval(final Object self, final Object str, final Object callThis, final Object location, final boolean strict) {
951 if (!isString(str)) {
952 return str;
953 }
954 final Global global = Global.instanceFrom(self);
955 final ScriptObject scope = self instanceof ScriptObject && ((ScriptObject)self).isScope() ? (ScriptObject)self : global;
956
957 return global.getContext().eval(scope, str.toString(), callThis, location, strict, true);
958 }
959
960 /**
961 * Global print implementation - Nashorn extension
962 *
963 * @param self scope
964 * @param objects arguments to print
965 *
966 * @return result of print (undefined)
967 */
968 public static Object print(final Object self, final Object... objects) {
969 return Global.instanceFrom(self).printImpl(false, objects);
970 }
971
972 /**
973 * Global println implementation - Nashorn extension
974 *
975 * @param self scope
976 * @param objects arguments to print
977 *
978 * @return result of println (undefined)
979 */
980 public static Object println(final Object self, final Object... objects) {
981 return Global.instanceFrom(self).printImpl(true, objects);
982 }
983
984 /**
985 * Global load implementation - Nashorn extension
986 *
987 * @param self scope
988 * @param source source to load
989 *
990 * @return result of load (undefined)
991 *
992 * @throws IOException if source could not be read
993 */
994 public static Object load(final Object self, final Object source) throws IOException {
995 final Global global = Global.instanceFrom(self);
996 final ScriptObject scope = self instanceof ScriptObject ? (ScriptObject)self : global;
997 return global.getContext().load(scope, source);
998 }
999
1000 /**
1001 * Global loadWithNewGlobal implementation - Nashorn extension
1002 *
1003 * @param self scope
1004 * @param args from plus (optional) arguments to be passed to the loaded script
1005 *
1006 * @return result of load (may be undefined)
1007 *
1008 * @throws IOException if source could not be read
1009 */
1010 public static Object loadWithNewGlobal(final Object self, final Object...args) throws IOException {
1011 final Global global = Global.instanceFrom(self);
1012 final int length = args.length;
1013 final boolean hasArgs = 0 < length;
1014 final Object from = hasArgs ? args[0] : UNDEFINED;
1015 final Object[] arguments = hasArgs ? Arrays.copyOfRange(args, 1, length) : args;
1016
1017 return global.getContext().loadWithNewGlobal(from, arguments);
1018 }
1019
1020 /**
1021 * Global exit and quit implementation - Nashorn extension: perform a {@code System.exit} call from the script
1022 *
1023 * @param self self reference
1024 * @param code exit code
1025 *
1026 * @return undefined (will never be reached)
1027 */
1028 public static Object exit(final Object self, final Object code) {
1029 System.exit(JSType.toInt32(code));
1030 return UNDEFINED;
1031 }
1032
1033 // builtin prototype accessors
1034
1035 /**
1036 * Get the builtin Object prototype.
1037 * @return the object prototype.
1038 */
1039 public ScriptObject getObjectPrototype() {
1040 return ScriptFunction.getPrototype(builtinObject);
1041 }
1042
1043 ScriptObject getFunctionPrototype() {
1044 return ScriptFunction.getPrototype(builtinFunction);
1045 }
1046
1047 ScriptObject getArrayPrototype() {
1048 return ScriptFunction.getPrototype(builtinArray);
1049 }
1050
1051 ScriptObject getBooleanPrototype() {
1052 return ScriptFunction.getPrototype(builtinBoolean);
1053 }
1054
1055 ScriptObject getNumberPrototype() {
1056 return ScriptFunction.getPrototype(builtinNumber);
1057 }
1058
1059 ScriptObject getDatePrototype() {
1060 return ScriptFunction.getPrototype(builtinDate);
1061 }
1062
1063 ScriptObject getRegExpPrototype() {
1064 return ScriptFunction.getPrototype(builtinRegExp);
1065 }
1066
1067 ScriptObject getStringPrototype() {
1068 return ScriptFunction.getPrototype(builtinString);
1069 }
1070
1071 ScriptObject getErrorPrototype() {
1072 return ScriptFunction.getPrototype(builtinError);
1073 }
1074
1075 ScriptObject getEvalErrorPrototype() {
1076 return ScriptFunction.getPrototype(builtinEvalError);
1077 }
1078
1079 ScriptObject getRangeErrorPrototype() {
1080 return ScriptFunction.getPrototype(builtinRangeError);
1081 }
1082
1083 ScriptObject getReferenceErrorPrototype() {
1084 return ScriptFunction.getPrototype(builtinReferenceError);
1085 }
1086
1087 ScriptObject getSyntaxErrorPrototype() {
1088 return ScriptFunction.getPrototype(builtinSyntaxError);
1089 }
1090
1091 ScriptObject getTypeErrorPrototype() {
1092 return ScriptFunction.getPrototype(builtinTypeError);
1093 }
1094
1095 ScriptObject getURIErrorPrototype() {
1096 return ScriptFunction.getPrototype(builtinURIError);
1097 }
1098
1099 ScriptObject getJavaImporterPrototype() {
1100 return ScriptFunction.getPrototype(builtinJavaImporter);
1101 }
1102
1103 ScriptObject getJSAdapterPrototype() {
1104 return ScriptFunction.getPrototype(builtinJSAdapter);
1105 }
1106
1107 ScriptObject getArrayBufferPrototype() {
1108 return ScriptFunction.getPrototype(builtinArrayBuffer);
1109 }
1110
1111 ScriptObject getDataViewPrototype() {
1112 return ScriptFunction.getPrototype(builtinDataView);
1113 }
1114
1115 ScriptObject getInt8ArrayPrototype() {
1116 return ScriptFunction.getPrototype(builtinInt8Array);
1117 }
1118
1119 ScriptObject getUint8ArrayPrototype() {
1120 return ScriptFunction.getPrototype(builtinUint8Array);
1121 }
1122
1123 ScriptObject getUint8ClampedArrayPrototype() {
1124 return ScriptFunction.getPrototype(builtinUint8ClampedArray);
1125 }
1126
1127 ScriptObject getInt16ArrayPrototype() {
1128 return ScriptFunction.getPrototype(builtinInt16Array);
1129 }
1130
1131 ScriptObject getUint16ArrayPrototype() {
1132 return ScriptFunction.getPrototype(builtinUint16Array);
1133 }
1134
1135 ScriptObject getInt32ArrayPrototype() {
1136 return ScriptFunction.getPrototype(builtinInt32Array);
1137 }
1138
1139 ScriptObject getUint32ArrayPrototype() {
1140 return ScriptFunction.getPrototype(builtinUint32Array);
1141 }
1142
1143 ScriptObject getFloat32ArrayPrototype() {
1144 return ScriptFunction.getPrototype(builtinFloat32Array);
1145 }
1146
1147 ScriptObject getFloat64ArrayPrototype() {
1148 return ScriptFunction.getPrototype(builtinFloat64Array);
1149 }
1150
1151 private ScriptFunction getBuiltinArray() {
1152 return builtinArray;
1153 }
1154
1155 ScriptFunction getTypeErrorThrower() {
1156 return typeErrorThrower;
1157 }
1158
1159 /**
1160 * Called from compiled script code to test if builtin has been overridden
1161 *
1162 * @return true if builtin array has not been overridden
1163 */
1164 public static boolean isBuiltinArray() {
1165 final Global instance = Global.instance();
1166 return instance.array == instance.getBuiltinArray();
1167 }
1168
1169 private ScriptFunction getBuiltinBoolean() {
1170 return builtinBoolean;
1171 }
1172
1173 /**
1174 * Called from compiled script code to test if builtin has been overridden
1175 *
1176 * @return true if builtin boolean has not been overridden
1177 */
1178 public static boolean isBuiltinBoolean() {
1179 final Global instance = Global.instance();
1180 return instance._boolean == instance.getBuiltinBoolean();
1181 }
1182
1183 private ScriptFunction getBuiltinDate() {
1184 return builtinDate;
1185 }
1186
1187 /**
1188 * Called from compiled script code to test if builtin has been overridden
1189 *
1190 * @return true if builtin date has not been overridden
1191 */
1192 public static boolean isBuiltinDate() {
1193 final Global instance = Global.instance();
1194 return instance.date == instance.getBuiltinDate();
1195 }
1196
1197 private ScriptFunction getBuiltinError() {
1198 return builtinError;
1199 }
1200
1201 /**
1202 * Called from compiled script code to test if builtin has been overridden
1203 *
1204 * @return true if builtin error has not been overridden
1205 */
1206 public static boolean isBuiltinError() {
1207 final Global instance = Global.instance();
1208 return instance.error == instance.getBuiltinError();
1209 }
1210
1211 private ScriptFunction getBuiltinEvalError() {
1212 return builtinEvalError;
1213 }
1214
1215 /**
1216 * Called from compiled script code to test if builtin has been overridden
1217 *
1218 * @return true if builtin eval error has not been overridden
1219 */
1220 public static boolean isBuiltinEvalError() {
1221 final Global instance = Global.instance();
1222 return instance.evalError == instance.getBuiltinEvalError();
1223 }
1224
1225 private ScriptFunction getBuiltinFunction() {
1226 return builtinFunction;
1227 }
1228
1229 /**
1230 * Called from compiled script code to test if builtin has been overridden
1231 *
1232 * @return true if builtin function has not been overridden
1233 */
1234 public static boolean isBuiltinFunction() {
1235 final Global instance = Global.instance();
1236 return instance.function == instance.getBuiltinFunction();
1237 }
1238
1239 /**
1240 * Get the switchpoint used to check property changes for Function.prototype.apply
1241 * @return the switchpoint guarding apply (same as guarding call, and everything else in function)
1242 */
1243 public static SwitchPoint getBuiltinFunctionApplySwitchPoint() {
1244 return ScriptFunction.getPrototype(Global.instance().getBuiltinFunction()).getProperty("apply").getBuiltinSwitchPoint();
1245 }
1246
1247 private static boolean isBuiltinFunctionProperty(final String name) {
1248 final Global instance = Global.instance();
1249 final ScriptFunction builtinFunction = instance.getBuiltinFunction();
1250 if (builtinFunction == null) {
1251 return false; //conservative for compile-only mode
1252 }
1253 final boolean isBuiltinFunction = instance.function == builtinFunction;
1254 return isBuiltinFunction && ScriptFunction.getPrototype(builtinFunction).getProperty(name).isBuiltin();
1255 }
1256
1257 /**
1258 * Check if the Function.prototype.apply has not been replaced
1259 * @return true if Function.prototype.apply has been replaced
1260 */
1261 public static boolean isBuiltinFunctionPrototypeApply() {
1262 return isBuiltinFunctionProperty("apply");
1263 }
1264
1265 /**
1266 * Check if the Function.prototype.apply has not been replaced
1267 * @return true if Function.prototype.call has been replaced
1268 */
1269 public static boolean isBuiltinFunctionPrototypeCall() {
1270 return isBuiltinFunctionProperty("call");
1271 }
1272
1273 private ScriptFunction getBuiltinJSAdapter() {
1274 return builtinJSAdapter;
1275 }
1276
1277 /**
1278 * Called from compiled script code to test if builtin has been overridden
1279 *
1280 * @return true if builtin JSAdapter has not been overridden
1281 */
1282 public static boolean isBuiltinJSAdapter() {
1283 final Global instance = Global.instance();
1284 return instance.jsadapter == instance.getBuiltinJSAdapter();
1285 }
1286
1287 private ScriptObject getBuiltinJSON() {
1288 return builtinJSON;
1289 }
1290
1291 /**
1292 * Called from compiled script code to test if builtin has been overridden
1293 *
1294 * @return true if builtin JSON has has not been overridden
1295 */
1296 public static boolean isBuiltinJSON() {
1297 final Global instance = Global.instance();
1298 return instance.json == instance.getBuiltinJSON();
1299 }
1300
1301 private ScriptObject getBuiltinJava() {
1302 return builtinJava;
1303 }
1304
1305 /**
1306 * Called from compiled script code to test if builtin has been overridden
1307 *
1308 * @return true if builtin Java has not been overridden
1309 */
1310 public static boolean isBuiltinJava() {
1311 final Global instance = Global.instance();
1312 return instance.java == instance.getBuiltinJava();
1313 }
1314
1315 private ScriptObject getBuiltinJavax() {
1316 return builtinJavax;
1317 }
1318
1319 /**
1320 * Called from compiled script code to test if builtin has been overridden
1321 *
1322 * @return true if builtin Javax has not been overridden
1323 */
1324 public static boolean isBuiltinJavax() {
1325 final Global instance = Global.instance();
1326 return instance.javax == instance.getBuiltinJavax();
1327 }
1328
1329 private ScriptObject getBuiltinJavaImporter() {
1330 return builtinJavaImporter;
1331 }
1332
1333 /**
1334 * Called from compiled script code to test if builtin has been overridden
1335 *
1336 * @return true if builtin Java importer has not been overridden
1337 */
1338 public static boolean isBuiltinJavaImporter() {
1339 final Global instance = Global.instance();
1340 return instance.javaImporter == instance.getBuiltinJavaImporter();
1341 }
1342
1343 private ScriptObject getBuiltinMath() {
1344 return builtinMath;
1345 }
1346
1347 /**
1348 * Called from compiled script code to test if builtin has been overridden
1349 *
1350 * @return true if builtin math has not been overridden
1351 */
1352 public static boolean isBuiltinMath() {
1353 final Global instance = Global.instance();
1354 return instance.math == instance.getBuiltinMath();
1355 }
1356
1357 private ScriptFunction getBuiltinNumber() {
1358 return builtinNumber;
1359 }
1360
1361 /**
1362 * Called from compiled script code to test if builtin has been overridden
1363 *
1364 * @return true if builtin number has not been overridden
1365 */
1366 public static boolean isBuiltinNumber() {
1367 final Global instance = Global.instance();
1368 return instance.number == instance.getBuiltinNumber();
1369 }
1370
1371 private ScriptFunction getBuiltinObject() {
1372 return builtinObject;
1373 }
1374
1375 /**
1376 * Called from compiled script code to test if builtin has been overridden
1377 *
1378 * @return true if builtin object has not been overridden
1379 */
1380 public static boolean isBuiltinObject() {
1381 final Global instance = Global.instance();
1382 return instance.object == instance.getBuiltinObject();
1383 }
1384
1385 private ScriptObject getBuiltinPackages() {
1386 return builtinPackages;
1387 }
1388
1389 /**
1390 * Called from compiled script code to test if builtin has been overridden
1391 *
1392 * @return true if builtin package has not been overridden
1393 */
1394 public static boolean isBuiltinPackages() {
1395 final Global instance = Global.instance();
1396 return instance.packages == instance.getBuiltinPackages();
1397 }
1398
1399 private ScriptFunction getBuiltinRangeError() {
1400 return builtinRangeError;
1401 }
1402
1403 /**
1404 * Called from compiled script code to test if builtin has been overridden
1405 *
1406 * @return true if builtin range error has not been overridden
1407 */
1408 public static boolean isBuiltinRangeError() {
1409 final Global instance = Global.instance();
1410 return instance.rangeError == instance.getBuiltinRangeError();
1411 }
1412
1413 private ScriptFunction getBuiltinReferenceError() {
1414 return builtinReferenceError;
1415 }
1416
1417 /**
1418 * Called from compiled script code to test if builtin has been overridden
1419 *
1420 * @return true if builtin reference error has not been overridden
1421 */
1422 public static boolean isBuiltinReferenceError() {
1423 final Global instance = Global.instance();
1424 return instance.referenceError == instance.getBuiltinReferenceError();
1425 }
1426
1427 private ScriptFunction getBuiltinRegExp() {
1428 return builtinRegExp;
1429 }
1430
1431 /**
1432 * Called from compiled script code to test if builtin has been overridden
1433 *
1434 * @return true if builtin regexp has not been overridden
1435 */
1436 public static boolean isBuiltinRegExp() {
1437 final Global instance = Global.instance();
1438 return instance.regexp == instance.getBuiltinRegExp();
1439 }
1440
1441 private ScriptFunction getBuiltinString() {
1442 return builtinString;
1443 }
1444
1445 /**
1446 * Called from compiled script code to test if builtin has been overridden
1447 *
1448 * @return true if builtin Java has not been overridden
1449 */
1450 public static boolean isBuiltinString() {
1451 final Global instance = Global.instance();
1452 return instance.string == instance.getBuiltinString();
1453 }
1454
1455 private ScriptFunction getBuiltinSyntaxError() {
1456 return builtinSyntaxError;
1457 }
1458
1459 /**
1460 * Called from compiled script code to test if builtin has been overridden
1461 *
1462 * @return true if builtin syntax error has not been overridden
1463 */
1464 public static boolean isBuiltinSyntaxError() {
1465 final Global instance = Global.instance();
1466 return instance.syntaxError == instance.getBuiltinSyntaxError();
1467 }
1468
1469 private ScriptFunction getBuiltinTypeError() {
1470 return builtinTypeError;
1471 }
1472
1473 /**
1474 * Called from compiled script code to test if builtin has been overridden
1475 *
1476 * @return true if builtin type error has not been overridden
1477 */
1478 public static boolean isBuiltinTypeError() {
1479 final Global instance = Global.instance();
1480 return instance.typeError == instance.getBuiltinTypeError();
1481 }
1482
1483 private ScriptFunction getBuiltinURIError() {
1484 return builtinURIError;
1485 }
1486
1487 /**
1488 * Called from compiled script code to test if builtin has been overridden
1489 *
1490 * @return true if builtin URI error has not been overridden
1491 */
1492 public static boolean isBuiltinURIError() {
1493 final Global instance = Global.instance();
1494 return instance.uriError == instance.getBuiltinURIError();
1495 }
1496
1497 @Override
1498 public String getClassName() {
1499 return "global";
1500 }
1501
1502 /**
1503 * Copy function used to clone NativeRegExp objects.
1504 *
1505 * @param regexp a NativeRegExp to clone
1506 *
1507 * @return copy of the given regexp object
1508 */
1509 public static Object regExpCopy(final Object regexp) {
1510 return new NativeRegExp((NativeRegExp)regexp);
1511 }
1512
1513 /**
1514 * Convert given object to NativeRegExp type.
1515 *
1516 * @param obj object to be converted
1517 * @return NativeRegExp instance
1518 */
1519 public static NativeRegExp toRegExp(final Object obj) {
1520 if (obj instanceof NativeRegExp) {
1521 return (NativeRegExp)obj;
1522 }
1523 return new NativeRegExp(JSType.toString(obj));
1524 }
1525
1526 /**
1527 * ECMA 9.9 ToObject implementation
1528 *
1529 * @param obj an item for which to run ToObject
1530 * @return ToObject version of given item
1531 */
1532 public static Object toObject(final Object obj) {
1533 if (obj == null || obj == UNDEFINED) {
1534 throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
1535 }
1536
1537 if (obj instanceof ScriptObject) {
1538 return obj;
1539 }
1540
1541 return instance().wrapAsObject(obj);
1542 }
1543
1544 /**
1545 * Allocate a new object array.
1546 *
1547 * @param initial object values.
1548 * @return the new array
1549 */
1550 public static NativeArray allocate(final Object[] initial) {
1551 ArrayData arrayData = ArrayData.allocate(initial);
1552
1553 for (int index = 0; index < initial.length; index++) {
1554 final Object value = initial[index];
1555
1556 if (value == ScriptRuntime.EMPTY) {
1557 arrayData = arrayData.delete(index);
1558 }
1559 }
1560
1561 return new NativeArray(arrayData);
1562 }
1563
1564 /**
1565 * Allocate a new number array.
1566 *
1567 * @param initial number values.
1568 * @return the new array
1569 */
1570 public static NativeArray allocate(final double[] initial) {
1571 return new NativeArray(ArrayData.allocate(initial));
1572 }
1573
1574 /**
1575 * Allocate a new long array.
1576 *
1577 * @param initial number values.
1578 * @return the new array
1579 */
1580 public static NativeArray allocate(final long[] initial) {
1581 return new NativeArray(ArrayData.allocate(initial));
1582 }
1583
1584 /**
1585 * Allocate a new integer array.
1586 *
1587 * @param initial number values.
1588 * @return the new array
1589 */
1590 public static NativeArray allocate(final int[] initial) {
1591 return new NativeArray(ArrayData.allocate(initial));
1592 }
1593
1594 /**
1595 * Allocate a new object array for arguments.
1596 *
1597 * @param arguments initial arguments passed.
1598 * @param callee reference to the function that uses arguments object
1599 * @param numParams actual number of declared parameters
1600 *
1601 * @return the new array
1602 */
1603 public static ScriptObject allocateArguments(final Object[] arguments, final Object callee, final int numParams) {
1604 return NativeArguments.allocate(arguments, (ScriptFunction)callee, numParams);
1605 }
1606
1607 /**
1608 * Called from generated to check if given function is the builtin 'eval'. If
1609 * eval is used in a script, a lot of optimizations and assumptions cannot be done.
1610 *
1611 * @param fn function object that is checked
1612 * @return true if fn is the builtin eval
1613 */
1614 public static boolean isEval(final Object fn) {
1615 return fn == Global.instance().builtinEval;
1616 }
1617
1618 /**
1619 * Called from generated to replace a location property placeholder with the actual location property value.
1620 *
1621 * @param placeholder the value tested for being a placeholder for a location property
1622 * @param locationProperty the actual value for the location property
1623 * @return locationProperty if placeholder is indeed a placeholder for a location property, the placeholder otherwise
1624 */
1625 public static Object replaceLocationPropertyPlaceholder(final Object placeholder, final Object locationProperty) {
1626 return isLocationPropertyPlaceholder(placeholder) ? locationProperty : placeholder;
1627 }
1628
1629 /**
1630 * Called from runtime internals to check if the passed value is a location property placeholder.
1631 * @param placeholder the value tested for being a placeholder for a location property
1632 * @return true if the value is a placeholder, false otherwise.
1633 */
1634 public static boolean isLocationPropertyPlaceholder(final Object placeholder) {
1635 return placeholder == LOCATION_PROPERTY_PLACEHOLDER;
1636 }
1637
1638 /**
1639 * Create a new RegExp object.
1640 *
1641 * @param expression Regular expression.
1642 * @param options Search options.
1643 *
1644 * @return New RegExp object.
1645 */
1646 public static Object newRegExp(final String expression, final String options) {
1647 if (options == null) {
1648 return new NativeRegExp(expression);
1649 }
1650 return new NativeRegExp(expression, options);
1651 }
1652
1653 /**
1654 * Get the object prototype
1655 *
1656 * @return the object prototype
1657 */
1658 public static ScriptObject objectPrototype() {
1659 return Global.instance().getObjectPrototype();
1660 }
1661
1662 /**
1663 * Create a new empty object instance.
1664 *
1665 * @return New empty object.
1666 */
1667 public static ScriptObject newEmptyInstance() {
1668 return Global.instance().newObject();
1669 }
1670
1671 /**
1672 * Check if a given object is a ScriptObject, raises an exception if this is
1673 * not the case
1674 *
1675 * @param obj and object to check
1676 * @return the script object
1677 */
1678 public static ScriptObject checkObject(final Object obj) {
1679 if (!(obj instanceof ScriptObject)) {
1680 throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
1681 }
1682 return (ScriptObject)obj;
1683 }
1684
1685 /**
1686 * ECMA 9.10 - implementation of CheckObjectCoercible, i.e. raise an exception
1687 * if this object is null or undefined.
1688 *
1689 * @param obj an object to check
1690 */
1691 public static void checkObjectCoercible(final Object obj) {
1692 if (obj == null || obj == UNDEFINED) {
1693 throw typeError("not.an.object", ScriptRuntime.safeToString(obj));
1694 }
1695 }
1696
1697 /**
1698 * Get the current split state.
1699 *
1700 * @return current split state
1701 */
1702 @Override
1703 public int getSplitState() {
1704 return splitState;
1705 }
1706
1707 /**
1708 * Set the current split state.
1709 *
1710 * @param state current split state
1711 */
1712 @Override
1713 public void setSplitState(final int state) {
1714 splitState = state;
1715 }
1716
1717 /**
1718 * Return the ES6 global scope for lexically declared bindings.
1719 * @return the ES6 lexical global scope.
1720 */
1721 public final ScriptObject getLexicalScope() {
1722 assert context.getEnv()._es6;
1723 return lexicalScope;
1724 }
1725
1726 @Override
1727 public void addBoundProperties(final ScriptObject source, final jdk.nashorn.internal.runtime.Property[] properties) {
1728 PropertyMap ownMap = getMap();
1729 LexicalScope lexicalScope = null;
1730 PropertyMap lexicalMap = null;
1731 boolean hasLexicalDefinitions = false;
1732
1733 if (context.getEnv()._es6) {
1734 lexicalScope = (LexicalScope) getLexicalScope();
1735 lexicalMap = lexicalScope.getMap();
1736
1737 for (final jdk.nashorn.internal.runtime.Property property : properties) {
1738 if (property.isLexicalBinding()) {
1739 hasLexicalDefinitions = true;
1740 }
1741 // ES6 15.1.8 steps 6. and 7.
1742 final jdk.nashorn.internal.runtime.Property globalProperty = ownMap.findProperty(property.getKey());
1743 if (globalProperty != null && !globalProperty.isConfigurable() && property.isLexicalBinding()) {
1744 throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
1745 }
1746 final jdk.nashorn.internal.runtime.Property lexicalProperty = lexicalMap.findProperty(property.getKey());
1747 if (lexicalProperty != null && !property.isConfigurable()) {
1748 throw ECMAErrors.syntaxError("redeclare.variable", property.getKey());
1749 }
1750 }
1751 }
1752
1753 for (final jdk.nashorn.internal.runtime.Property property : properties) {
1754 if (property.isLexicalBinding()) {
1755 assert lexicalScope != null;
1756 lexicalMap = lexicalScope.addBoundProperty(lexicalMap, source, property);
1757
1758 if (ownMap.findProperty(property.getKey()) != null) {
1759 // If property exists in the global object invalidate any global constant call sites.
1760 invalidateGlobalConstant(property.getKey());
1761 }
1762 } else {
1763 ownMap = addBoundProperty(ownMap, source, property);
1764 }
1765 }
1766
1767 setMap(ownMap);
1768
1769 if (hasLexicalDefinitions) {
1770 lexicalScope.setMap(lexicalMap);
1771 invalidateLexicalSwitchPoint();
1772 }
1773 }
1774
1775 @Override
1776 public GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
1777 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
1778 final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
1779
1780 if (lexicalScope != null && isScope && !NashornCallSiteDescriptor.isApplyToCall(desc)) {
1781 if (lexicalScope.hasOwnProperty(name)) {
1782 return lexicalScope.findGetMethod(desc, request, operator);
1783 }
1784 }
1785
1786 final GuardedInvocation invocation = super.findGetMethod(desc, request, operator);
1787
1788 // We want to avoid adding our generic lexical scope switchpoint to global constant invocations,
1789 // because those are invalidated per-key in the addBoundProperties method above.
1790 // We therefor check if the invocation does already have a switchpoint and the property is non-inherited,
1791 // assuming this only applies to global constants. If other non-inherited properties will
1792 // start using switchpoints some time in the future we'll have to revisit this.
1793 if (isScope && context.getEnv()._es6 && (invocation.getSwitchPoints() == null || !hasOwnProperty(name))) {
1794 return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
1795 }
1796
1797 return invocation;
1798 }
1799
1800 @Override
1801 public GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
1802 final boolean isScope = NashornCallSiteDescriptor.isScope(desc);
1803
1804 if (lexicalScope != null && isScope) {
1805 final String name = desc.getNameToken(CallSiteDescriptor.NAME_OPERAND);
1806 if (lexicalScope.hasOwnProperty(name)) {
1807 return lexicalScope.findSetMethod(desc, request);
1808 }
1809 }
1810
1811 final GuardedInvocation invocation = super.findSetMethod(desc, request);
1812
1813 if (isScope && context.getEnv()._es6) {
1814 return invocation.addSwitchPoint(getLexicalScopeSwitchPoint());
1815 }
1816
1817 return invocation;
1818 }
1819
1820 private synchronized SwitchPoint getLexicalScopeSwitchPoint() {
1821 SwitchPoint switchPoint = lexicalScopeSwitchPoint;
1822 if (switchPoint == null || switchPoint.hasBeenInvalidated()) {
1823 switchPoint = lexicalScopeSwitchPoint = new SwitchPoint();
1824 }
1825 return switchPoint;
1826 }
1827
1828 private synchronized void invalidateLexicalSwitchPoint() {
1829 if (lexicalScopeSwitchPoint != null) {
1830 context.getLogger(GlobalConstants.class).info("Invalidating non-constant globals on lexical scope update");
1831 SwitchPoint.invalidateAll(new SwitchPoint[]{ lexicalScopeSwitchPoint });
1832 }
1833 }
1834
1835
1836 @SuppressWarnings("unused")
1837 private static Object lexicalScopeFilter(final Object self) {
1838 if (self instanceof Global) {
1839 return ((Global) self).getLexicalScope();
1840 }
1841 return self;
1842 }
1843
1844 private <T extends ScriptObject> T initConstructorAndSwitchPoint(final String name, final Class<T> clazz) {
1845 final T func = initConstructor(name, clazz);
1846 tagBuiltinProperties(name, func);
1847 return func;
1848 }
1849
1850 @SuppressWarnings("hiding")
1851 private void init(final ScriptEngine engine) {
1852 assert Context.getGlobal() == this : "this global is not set as current";
1853
1854 final ScriptEnvironment env = getContext().getEnv();
1855
1856 // initialize Function and Object constructor
1857 initFunctionAndObject();
1858
1859 // Now fix Global's own proto.
1860 this.setInitialProto(getObjectPrototype());
1861
1862 // initialize global function properties
1863 this.eval = this.builtinEval = ScriptFunctionImpl.makeFunction("eval", EVAL);
1864
1865 this.parseInt = ScriptFunctionImpl.makeFunction("parseInt", GlobalFunctions.PARSEINT,
1866 new Specialization[] {
1867 new Specialization(GlobalFunctions.PARSEINT_Z),
1868 new Specialization(GlobalFunctions.PARSEINT_I),
1869 new Specialization(GlobalFunctions.PARSEINT_J),
1870 new Specialization(GlobalFunctions.PARSEINT_OI),
1871 new Specialization(GlobalFunctions.PARSEINT_O) });
1872 this.parseFloat = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
1873 this.isNaN = ScriptFunctionImpl.makeFunction("isNaN", GlobalFunctions.IS_NAN,
1874 new Specialization[] {
1875 new Specialization(GlobalFunctions.IS_NAN_I),
1876 new Specialization(GlobalFunctions.IS_NAN_J),
1877 new Specialization(GlobalFunctions.IS_NAN_D) });
1878 this.parseFloat = ScriptFunctionImpl.makeFunction("parseFloat", GlobalFunctions.PARSEFLOAT);
1879 this.isNaN = ScriptFunctionImpl.makeFunction("isNaN", GlobalFunctions.IS_NAN);
1880 this.isFinite = ScriptFunctionImpl.makeFunction("isFinite", GlobalFunctions.IS_FINITE);
1881 this.encodeURI = ScriptFunctionImpl.makeFunction("encodeURI", GlobalFunctions.ENCODE_URI);
1882 this.encodeURIComponent = ScriptFunctionImpl.makeFunction("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT);
1883 this.decodeURI = ScriptFunctionImpl.makeFunction("decodeURI", GlobalFunctions.DECODE_URI);
1884 this.decodeURIComponent = ScriptFunctionImpl.makeFunction("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT);
1885 this.escape = ScriptFunctionImpl.makeFunction("escape", GlobalFunctions.ESCAPE);
1886 this.unescape = ScriptFunctionImpl.makeFunction("unescape", GlobalFunctions.UNESCAPE);
1887 this.print = ScriptFunctionImpl.makeFunction("print", env._print_no_newline ? PRINT : PRINTLN);
1888 this.load = ScriptFunctionImpl.makeFunction("load", LOAD);
1889 this.loadWithNewGlobal = ScriptFunctionImpl.makeFunction("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL);
1890 this.exit = ScriptFunctionImpl.makeFunction("exit", EXIT);
1891 this.quit = ScriptFunctionImpl.makeFunction("quit", EXIT);
1892
1893 // built-in constructors
1894 this.builtinArray = initConstructorAndSwitchPoint("Array", ScriptFunction.class);
1895 this.builtinBoolean = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class);
1896 this.builtinDate = initConstructorAndSwitchPoint("Date", ScriptFunction.class);
1897 this.builtinJSON = initConstructorAndSwitchPoint("JSON", ScriptObject.class);
1898 this.builtinJSAdapter = initConstructorAndSwitchPoint("JSAdapter", ScriptFunction.class);
1899 this.builtinMath = initConstructorAndSwitchPoint("Math", ScriptObject.class);
1900 this.builtinNumber = initConstructorAndSwitchPoint("Number", ScriptFunction.class);
1901 this.builtinRegExp = initConstructorAndSwitchPoint("RegExp", ScriptFunction.class);
1902 this.builtinString = initConstructorAndSwitchPoint("String", ScriptFunction.class);
1903
1904 // initialize String.prototype.length to 0
1905 // add String.prototype.length
1906 final ScriptObject stringPrototype = getStringPrototype();
1907 stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0);
1908
1909 // set isArray flag on Array.prototype
1910 final ScriptObject arrayPrototype = getArrayPrototype();
1911 arrayPrototype.setIsArray();
1912
1913 this.DEFAULT_DATE = new NativeDate(Double.NaN, this);
1914
1915 // initialize default regexp object
1916 this.DEFAULT_REGEXP = new NativeRegExp("(?:)", this);
1917
1918 // RegExp.prototype should behave like a RegExp object. So copy the
1919 // properties.
1920 final ScriptObject regExpProto = getRegExpPrototype();
1921 regExpProto.addBoundProperties(DEFAULT_REGEXP);
1922
1923 // Error stuff
1924 initErrorObjects();
1925
1926 // java access
1927 if (! env._no_java) {
1928 initJavaAccess();
1929 }
1930
1931 if (! env._no_typed_arrays) {
1932 initTypedArray();
1933 }
1934
1935 if (env._scripting) {
1936 initScripting(env);
1937 }
1938
1939 if (Context.DEBUG) {
1940 boolean debugOkay;
1941 final SecurityManager sm = System.getSecurityManager();
1942 if (sm != null) {
1943 try {
1944 sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE));
1945 debugOkay = true;
1946 } catch (final SecurityException ignored) {
1947 // if no permission, don't initialize Debug object
1948 debugOkay = false;
1949 }
1950
1951 } else {
1952 debugOkay = true;
1953 }
1954
1955 if (debugOkay) {
1956 initDebug();
1957 }
1958 }
1959
1960 copyBuiltins();
1961
1962 // expose script (command line) arguments as "arguments" property of global
1963 arguments = wrapAsObject(env.getArguments().toArray());
1964 if (env._scripting) {
1965 // synonym for "arguments" in scripting mode
1966 addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments);
1967 }
1968
1969 if (engine != null) {
1970 // default file name
1971 addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null);
1972 // __noSuchProperty__ hook for ScriptContext search of missing variables
1973 final ScriptFunction noSuchProp = ScriptFunctionImpl.makeStrictFunction(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY);
1974 addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp);
1975 }
1976 }
1977
1978 private void initErrorObjects() {
1979 // Error objects
1980 this.builtinError = initConstructor("Error", ScriptFunction.class);
1981 final ScriptObject errorProto = getErrorPrototype();
1982
1983 // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName
1984 final ScriptFunction getStack = ScriptFunctionImpl.makeFunction("getStack", NativeError.GET_STACK);
1985 final ScriptFunction setStack = ScriptFunctionImpl.makeFunction("setStack", NativeError.SET_STACK);
1986 errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack);
1987 final ScriptFunction getLineNumber = ScriptFunctionImpl.makeFunction("getLineNumber", NativeError.GET_LINENUMBER);
1988 final ScriptFunction setLineNumber = ScriptFunctionImpl.makeFunction("setLineNumber", NativeError.SET_LINENUMBER);
1989 errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber);
1990 final ScriptFunction getColumnNumber = ScriptFunctionImpl.makeFunction("getColumnNumber", NativeError.GET_COLUMNNUMBER);
1991 final ScriptFunction setColumnNumber = ScriptFunctionImpl.makeFunction("setColumnNumber", NativeError.SET_COLUMNNUMBER);
1992 errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber);
1993 final ScriptFunction getFileName = ScriptFunctionImpl.makeFunction("getFileName", NativeError.GET_FILENAME);
1994 final ScriptFunction setFileName = ScriptFunctionImpl.makeFunction("setFileName", NativeError.SET_FILENAME);
1995 errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName);
1996
1997 // ECMA 15.11.4.2 Error.prototype.name
1998 // Error.prototype.name = "Error";
1999 errorProto.set(NativeError.NAME, "Error", 0);
2000 // ECMA 15.11.4.3 Error.prototype.message
2001 // Error.prototype.message = "";
2002 errorProto.set(NativeError.MESSAGE, "", 0);
2003
2004 tagBuiltinProperties("Error", builtinError);
2005
2006 this.builtinEvalError = initErrorSubtype("EvalError", errorProto);
2007 this.builtinRangeError = initErrorSubtype("RangeError", errorProto);
2008 this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto);
2009 this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto);
2010 this.builtinTypeError = initErrorSubtype("TypeError", errorProto);
2011 this.builtinURIError = initErrorSubtype("URIError", errorProto);
2012 }
2013
2014 private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) {
2015 final ScriptFunction cons = initConstructor(name, ScriptFunction.class);
2016 final ScriptObject prototype = ScriptFunction.getPrototype(cons);
2017 prototype.set(NativeError.NAME, name, 0);
2018 prototype.set(NativeError.MESSAGE, "", 0);
2019 prototype.setInitialProto(errorProto);
2020 tagBuiltinProperties(name, cons);
2021 return cons;
2022 }
2023
2024 private void initJavaAccess() {
2025 final ScriptObject objectProto = getObjectPrototype();
2026 this.builtinPackages = new NativeJavaPackage("", objectProto);
2027 this.builtinCom = new NativeJavaPackage("com", objectProto);
2028 this.builtinEdu = new NativeJavaPackage("edu", objectProto);
2029 this.builtinJava = new NativeJavaPackage("java", objectProto);
2030 this.builtinJavafx = new NativeJavaPackage("javafx", objectProto);
2031 this.builtinJavax = new NativeJavaPackage("javax", objectProto);
2032 this.builtinOrg = new NativeJavaPackage("org", objectProto);
2033 this.builtinJavaImporter = initConstructor("JavaImporter", ScriptFunction.class);
2034 this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
2035 }
2036
2037 private void initScripting(final ScriptEnvironment scriptEnv) {
2038 Object value;
2039 value = ScriptFunctionImpl.makeFunction("readLine", ScriptingFunctions.READLINE);
2040 addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value);
2041
2042 value = ScriptFunctionImpl.makeFunction("readFully", ScriptingFunctions.READFULLY);
2043 addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value);
2044
2045 final String execName = ScriptingFunctions.EXEC_NAME;
2046 value = ScriptFunctionImpl.makeFunction(execName, ScriptingFunctions.EXEC);
2047 addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value);
2048
2049 // Nashorn extension: global.echo (scripting-mode-only)
2050 // alias for "print"
2051 value = get("print");
2052 addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value);
2053
2054 // Nashorn extension: global.$OPTIONS (scripting-mode-only)
2055 final ScriptObject options = newObject();
2056 copyOptions(options, scriptEnv);
2057 addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options);
2058
2059 // Nashorn extension: global.$ENV (scripting-mode-only)
2060 if (System.getSecurityManager() == null) {
2061 // do not fill $ENV if we have a security manager around
2062 // Retrieve current state of ENV variables.
2063 final ScriptObject env = newObject();
2064 env.putAll(System.getenv(), scriptEnv._strict);
2065 addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env);
2066 } else {
2067 addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2068 }
2069
2070 // add other special properties for exec support
2071 addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2072 addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2073 addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED);
2074 }
2075
2076 private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) {
2077 for (final Field f : scriptEnv.getClass().getFields()) {
2078 try {
2079 options.set(f.getName(), f.get(scriptEnv), 0);
2080 } catch (final IllegalArgumentException | IllegalAccessException exp) {
2081 throw new RuntimeException(exp);
2082 }
2083 }
2084 }
2085
2086 private void initTypedArray() {
2087 this.builtinArrayBuffer = initConstructorAndSwitchPoint("ArrayBuffer", ScriptFunction.class);
2088 this.builtinDataView = initConstructorAndSwitchPoint("DataView", ScriptFunction.class);
2089 this.builtinInt8Array = initConstructorAndSwitchPoint("Int8Array", ScriptFunction.class);
2090 this.builtinUint8Array = initConstructorAndSwitchPoint("Uint8Array", ScriptFunction.class);
2091 this.builtinUint8ClampedArray = initConstructorAndSwitchPoint("Uint8ClampedArray", ScriptFunction.class);
2092 this.builtinInt16Array = initConstructorAndSwitchPoint("Int16Array", ScriptFunction.class);
2093 this.builtinUint16Array = initConstructorAndSwitchPoint("Uint16Array", ScriptFunction.class);
2094 this.builtinInt32Array = initConstructorAndSwitchPoint("Int32Array", ScriptFunction.class);
2095 this.builtinUint32Array = initConstructorAndSwitchPoint("Uint32Array", ScriptFunction.class);
2096 this.builtinFloat32Array = initConstructorAndSwitchPoint("Float32Array", ScriptFunction.class);
2097 this.builtinFloat64Array = initConstructorAndSwitchPoint("Float64Array", ScriptFunction.class);
2098
2099 }
2100
2101 private void copyBuiltins() {
2102 this.array = this.builtinArray;
2103 this._boolean = this.builtinBoolean;
2104 this.date = this.builtinDate;
2105 this.error = this.builtinError;
2106 this.evalError = this.builtinEvalError;
2107 this.function = this.builtinFunction;
2108 this.jsadapter = this.builtinJSAdapter;
2109 this.json = this.builtinJSON;
2110 this.com = this.builtinCom;
2111 this.edu = this.builtinEdu;
2112 this.java = this.builtinJava;
2113 this.javafx = this.builtinJavafx;
2114 this.javax = this.builtinJavax;
2115 this.org = this.builtinOrg;
2116 this.javaImporter = this.builtinJavaImporter;
2117 this.javaApi = this.builtinJavaApi;
2118 this.math = this.builtinMath;
2119 this.number = this.builtinNumber;
2120 this.object = this.builtinObject;
2121 this.packages = this.builtinPackages;
2122 this.rangeError = this.builtinRangeError;
2123 this.referenceError = this.builtinReferenceError;
2124 this.regexp = this.builtinRegExp;
2125 this.string = this.builtinString;
2126 this.syntaxError = this.builtinSyntaxError;
2127 this.typeError = this.builtinTypeError;
2128 this.uriError = this.builtinURIError;
2129 this.arrayBuffer = this.builtinArrayBuffer;
2130 this.dataView = this.builtinDataView;
2131 this.int8Array = this.builtinInt8Array;
2132 this.uint8Array = this.builtinUint8Array;
2133 this.uint8ClampedArray = this.builtinUint8ClampedArray;
2134 this.int16Array = this.builtinInt16Array;
2135 this.uint16Array = this.builtinUint16Array;
2136 this.int32Array = this.builtinInt32Array;
2137 this.uint32Array = this.builtinUint32Array;
2138 this.float32Array = this.builtinFloat32Array;
2139 this.float64Array = this.builtinFloat64Array;
2140 }
2141
2142 private void initDebug() {
2143 this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class));
2144 }
2145
2146 private Object printImpl(final boolean newLine, final Object... objects) {
2147 @SuppressWarnings("resource")
2148 final PrintWriter out = scontext != null? new PrintWriter(scontext.getWriter()) : getContext().getEnv().getOut();
2149 final StringBuilder sb = new StringBuilder();
2150
2151 for (final Object obj : objects) {
2152 if (sb.length() != 0) {
2153 sb.append(' ');
2154 }
2155
2156 sb.append(JSType.toString(obj));
2157 }
2158
2159 // Print all at once to ensure thread friendly result.
2160 if (newLine) {
2161 out.println(sb.toString());
2162 } else {
2163 out.print(sb.toString());
2164 }
2165
2166 out.flush();
2167
2168 return UNDEFINED;
2169 }
2170
2171 private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) {
2172 try {
2173 // Assuming class name pattern for built-in JS constructors.
2174 final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects.");
2175
2176 sb.append("Native");
2177 sb.append(name);
2178 sb.append("$Constructor");
2179
2180 final Class<?> funcClass = Class.forName(sb.toString());
2181 final T res = clazz.cast(funcClass.newInstance());
2182
2183 if (res instanceof ScriptFunction) {
2184 // All global constructor prototypes are not-writable,
2185 // not-enumerable and not-configurable.
2186 final ScriptFunction func = (ScriptFunction)res;
2187 func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT);
2188 }
2189
2190 if (res.getProto() == null) {
2191 res.setInitialProto(getObjectPrototype());
2192 }
2193
2194 res.setIsBuiltin();
2195
2196 return res;
2197 } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) {
2198 throw new RuntimeException(e);
2199 }
2200 }
2201
2202 private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) {
2203 final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>();
2204
2205 list.addAll(Arrays.asList(func.getMap().getProperties()));
2206
2207 if (func instanceof ScriptFunction) {
2208 final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func);
2209 if (proto != null) {
2210 list.addAll(Arrays.asList(proto.getMap().getProperties()));
2211 }
2212 }
2213
2214 final jdk.nashorn.internal.runtime.Property prop = getProperty(name);
2215 if (prop != null) {
2216 list.add(prop);
2217 }
2218
2219 return list;
2220 }
2221
2222 /**
2223 * Given a builtin object, traverse its properties recursively and associate them with a name that
2224 * will be a key to their invalidation switchpoint.
2225 * @param name name for key
2226 * @param func builtin script object
2227 */
2228 private void tagBuiltinProperties(final String name, final ScriptObject func) {
2229 SwitchPoint sp = context.getBuiltinSwitchPoint(name);
2230 if (sp == null) {
2231 sp = context.newBuiltinSwitchPoint(name);
2232 }
2233
2234 //get all builtin properties in this builtin object and register switchpoints keyed on the propery name,
2235 //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc
2236 for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) {
2237 prop.setBuiltinSwitchPoint(sp);
2238 }
2239 }
2240
2241 // Function and Object constructors are inter-dependent. Also,
2242 // Function.prototype
2243 // functions are not properly initialized. We fix the references here.
2244 // NOTE: be careful if you want to re-order the operations here. You may
2245 // have
2246 // to play with object references carefully!!
2247 private void initFunctionAndObject() {
2248 // First-n-foremost is Function
2249
2250 this.builtinFunction = initConstructor("Function", ScriptFunction.class);
2251
2252 // create global anonymous function
2253 final ScriptFunction anon = ScriptFunctionImpl.newAnonymousFunction();
2254 // need to copy over members of Function.prototype to anon function
2255 anon.addBoundProperties(getFunctionPrototype());
2256
2257 // Function.prototype === Object.getPrototypeOf(Function) ===
2258 // <anon-function>
2259 builtinFunction.setInitialProto(anon);
2260 builtinFunction.setPrototype(anon);
2261 anon.set("constructor", builtinFunction, 0);
2262 anon.deleteOwnProperty(anon.getMap().findProperty("prototype"));
2263
2264 // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3
2265 this.typeErrorThrower = new ScriptFunctionImpl("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER, null, null, 0);
2266 typeErrorThrower.setPrototype(UNDEFINED);
2267 // Non-constructor built-in functions do not have "prototype" property
2268 typeErrorThrower.deleteOwnProperty(typeErrorThrower.getMap().findProperty("prototype"));
2269 typeErrorThrower.preventExtensions();
2270
2271 // now initialize Object
2272 this.builtinObject = initConstructor("Object", ScriptFunction.class);
2273 final ScriptObject ObjectPrototype = getObjectPrototype();
2274 // Object.getPrototypeOf(Function.prototype) === Object.prototype
2275 anon.setInitialProto(ObjectPrototype);
2276
2277 // ES6 draft compliant __proto__ property of Object.prototype
2278 // accessors on Object.prototype for "__proto__"
2279 final ScriptFunction getProto = ScriptFunctionImpl.makeFunction("getProto", NativeObject.GET__PROTO__);
2280 final ScriptFunction setProto = ScriptFunctionImpl.makeFunction("setProto", NativeObject.SET__PROTO__);
2281 ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto);
2282
2283 // Function valued properties of Function.prototype were not properly
2284 // initialized. Because, these were created before global.function and
2285 // global.object were not initialized.
2286 jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties();
2287 for (final jdk.nashorn.internal.runtime.Property property : properties) {
2288 final Object key = property.getKey();
2289 final Object value = builtinFunction.get(key);
2290
2291 if (value instanceof ScriptFunction && value != anon) {
2292 final ScriptFunction func = (ScriptFunction)value;
2293 func.setInitialProto(getFunctionPrototype());
2294 final ScriptObject prototype = ScriptFunction.getPrototype(func);
2295 if (prototype != null) {
2296 prototype.setInitialProto(ObjectPrototype);
2297 }
2298 }
2299 }
2300
2301 // For function valued properties of Object and Object.prototype, make
2302 // sure prototype's proto chain ends with Object.prototype
2303 for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) {
2304 final Object key = property.getKey();
2305 final Object value = builtinObject.get(key);
2306
2307 if (value instanceof ScriptFunction) {
2308 final ScriptFunction func = (ScriptFunction)value;
2309 final ScriptObject prototype = ScriptFunction.getPrototype(func);
2310 if (prototype != null) {
2311 prototype.setInitialProto(ObjectPrototype);
2312 }
2313 }
2314 }
2315
2316 properties = getObjectPrototype().getMap().getProperties();
2317
2318 for (final jdk.nashorn.internal.runtime.Property property : properties) {
2319 final Object key = property.getKey();
2320 if (key.equals("constructor")) {
2321 continue;
2322 }
2323
2324 final Object value = ObjectPrototype.get(key);
2325 if (value instanceof ScriptFunction) {
2326 final ScriptFunction func = (ScriptFunction)value;
2327 final ScriptObject prototype = ScriptFunction.getPrototype(func);
2328 if (prototype != null) {
2329 prototype.setInitialProto(ObjectPrototype);
2330 }
2331 }
2332 }
2333
2334 tagBuiltinProperties("Object", builtinObject);
2335 tagBuiltinProperties("Function", builtinFunction);
2336 tagBuiltinProperties("Function", anon);
2337 }
2338
2339 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) {
2340 return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types));
2341 }
2342
2343 RegExpResult getLastRegExpResult() {
2344 return lastRegExpResult;
2345 }
2346
2347 void setLastRegExpResult(final RegExpResult regExpResult) {
2348 this.lastRegExpResult = regExpResult;
2349 }
2350
2351 @Override
2352 protected boolean isGlobal() {
2353 return true;
2354 }
2355
2356 /**
2357 * A class representing the ES6 global lexical scope.
2358 */
2359 private static class LexicalScope extends ScriptObject {
2360
2361 LexicalScope(final ScriptObject proto) {
2362 super(proto, PropertyMap.newMap());
2363 }
2364
2365 @Override
2366 protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) {
2367 return filterInvocation(super.findGetMethod(desc, request, operator));
2368 }
2369
2370 @Override
2371 protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) {
2372 return filterInvocation(super.findSetMethod(desc, request));
2373 }
2374
2375 @Override
2376 protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property) {
2377 // We override this method just to make it callable by Global
2378 return super.addBoundProperty(propMap, source, property);
2379 }
2380
2381 private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) {
2382 final MethodType type = invocation.getInvocation().type();
2383 return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER);
2384 }
2385 }
2386
2387 }