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.Getter; 58 import jdk.nashorn.internal.objects.annotations.Property; 59 import jdk.nashorn.internal.objects.annotations.ScriptClass; 60 import jdk.nashorn.internal.objects.annotations.Setter; 61 import jdk.nashorn.internal.runtime.Context; 62 import jdk.nashorn.internal.runtime.ECMAErrors; 63 import jdk.nashorn.internal.runtime.FindProperty; 64 import jdk.nashorn.internal.runtime.GlobalConstants; 65 import jdk.nashorn.internal.runtime.GlobalFunctions; 66 import jdk.nashorn.internal.runtime.JSType; 67 import jdk.nashorn.internal.runtime.NativeJavaPackage; 68 import jdk.nashorn.internal.runtime.PropertyDescriptor; 69 import jdk.nashorn.internal.runtime.PropertyMap; 70 import jdk.nashorn.internal.runtime.Scope; 71 import jdk.nashorn.internal.runtime.ScriptEnvironment; 72 import jdk.nashorn.internal.runtime.ScriptFunction; 73 import jdk.nashorn.internal.runtime.ScriptObject; 74 import jdk.nashorn.internal.runtime.ScriptRuntime; 75 import jdk.nashorn.internal.runtime.ScriptingFunctions; 76 import jdk.nashorn.internal.runtime.Specialization; 77 import jdk.nashorn.internal.runtime.arrays.ArrayData; 78 import jdk.nashorn.internal.runtime.linker.Bootstrap; 79 import jdk.nashorn.internal.runtime.linker.InvokeByName; 80 import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor; 81 import jdk.nashorn.internal.runtime.regexp.RegExpResult; 82 import jdk.nashorn.internal.scripts.JD; 83 import jdk.nashorn.internal.scripts.JO; 84 import jdk.nashorn.tools.ShellFunctions; 85 86 /** 87 * Representation of global scope. 88 */ 89 @ScriptClass("Global") 90 public 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(<script_from_source>); 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 @SuppressWarnings("hiding") 2248 private void init(final ScriptEngine eng) { 2249 assert Context.getGlobal() == this : "this global is not set as current"; 2250 2251 final ScriptEnvironment env = getContext().getEnv(); 2252 2253 // initialize Function and Object constructor 2254 initFunctionAndObject(); 2255 2256 // Now fix Global's own proto. 2257 this.setInitialProto(getObjectPrototype()); 2258 2259 // initialize global function properties 2260 this.eval = this.builtinEval = ScriptFunction.createBuiltin("eval", EVAL); 2261 2262 this.parseInt = ScriptFunction.createBuiltin("parseInt", GlobalFunctions.PARSEINT, 2263 new Specialization[] { 2264 new Specialization(GlobalFunctions.PARSEINT_Z), 2265 new Specialization(GlobalFunctions.PARSEINT_I), 2266 new Specialization(GlobalFunctions.PARSEINT_J), 2267 new Specialization(GlobalFunctions.PARSEINT_OI), 2268 new Specialization(GlobalFunctions.PARSEINT_O) }); 2269 this.parseFloat = ScriptFunction.createBuiltin("parseFloat", GlobalFunctions.PARSEFLOAT); 2270 this.isNaN = ScriptFunction.createBuiltin("isNaN", GlobalFunctions.IS_NAN, 2271 new Specialization[] { 2272 new Specialization(GlobalFunctions.IS_NAN_I), 2273 new Specialization(GlobalFunctions.IS_NAN_J), 2274 new Specialization(GlobalFunctions.IS_NAN_D) }); 2275 this.parseFloat = ScriptFunction.createBuiltin("parseFloat", GlobalFunctions.PARSEFLOAT); 2276 this.isNaN = ScriptFunction.createBuiltin("isNaN", GlobalFunctions.IS_NAN); 2277 this.isFinite = ScriptFunction.createBuiltin("isFinite", GlobalFunctions.IS_FINITE); 2278 this.encodeURI = ScriptFunction.createBuiltin("encodeURI", GlobalFunctions.ENCODE_URI); 2279 this.encodeURIComponent = ScriptFunction.createBuiltin("encodeURIComponent", GlobalFunctions.ENCODE_URICOMPONENT); 2280 this.decodeURI = ScriptFunction.createBuiltin("decodeURI", GlobalFunctions.DECODE_URI); 2281 this.decodeURIComponent = ScriptFunction.createBuiltin("decodeURIComponent", GlobalFunctions.DECODE_URICOMPONENT); 2282 this.escape = ScriptFunction.createBuiltin("escape", GlobalFunctions.ESCAPE); 2283 this.unescape = ScriptFunction.createBuiltin("unescape", GlobalFunctions.UNESCAPE); 2284 this.print = ScriptFunction.createBuiltin("print", env._print_no_newline ? PRINT : PRINTLN); 2285 this.load = ScriptFunction.createBuiltin("load", LOAD); 2286 this.loadWithNewGlobal = ScriptFunction.createBuiltin("loadWithNewGlobal", LOAD_WITH_NEW_GLOBAL); 2287 this.exit = ScriptFunction.createBuiltin("exit", EXIT); 2288 this.quit = ScriptFunction.createBuiltin("quit", EXIT); 2289 2290 // built-in constructors 2291 this.builtinArray = initConstructorAndSwitchPoint("Array", ScriptFunction.class); 2292 this.builtinBoolean = initConstructorAndSwitchPoint("Boolean", ScriptFunction.class); 2293 this.builtinNumber = initConstructorAndSwitchPoint("Number", ScriptFunction.class); 2294 this.builtinString = initConstructorAndSwitchPoint("String", ScriptFunction.class); 2295 this.builtinMath = initConstructorAndSwitchPoint("Math", ScriptObject.class); 2296 2297 // initialize String.prototype.length to 0 2298 // add String.prototype.length 2299 final ScriptObject stringPrototype = getStringPrototype(); 2300 stringPrototype.addOwnProperty("length", Attribute.NON_ENUMERABLE_CONSTANT, 0.0); 2301 2302 // set isArray flag on Array.prototype 2303 final ScriptObject arrayPrototype = getArrayPrototype(); 2304 arrayPrototype.setIsArray(); 2305 2306 // Error stuff 2307 initErrorObjects(); 2308 2309 // java access 2310 if (! env._no_java) { 2311 this.javaApi = LAZY_SENTINEL; 2312 this.javaImporter = LAZY_SENTINEL; 2313 initJavaAccess(); 2314 } 2315 2316 if (! env._no_typed_arrays) { 2317 this.arrayBuffer = LAZY_SENTINEL; 2318 this.dataView = LAZY_SENTINEL; 2319 this.int8Array = LAZY_SENTINEL; 2320 this.uint8Array = LAZY_SENTINEL; 2321 this.uint8ClampedArray = LAZY_SENTINEL; 2322 this.int16Array = LAZY_SENTINEL; 2323 this.uint16Array = LAZY_SENTINEL; 2324 this.int32Array = LAZY_SENTINEL; 2325 this.uint32Array = LAZY_SENTINEL; 2326 this.float32Array = LAZY_SENTINEL; 2327 this.float64Array = LAZY_SENTINEL; 2328 } 2329 2330 if (env._scripting) { 2331 initScripting(env); 2332 } 2333 2334 if (Context.DEBUG) { 2335 boolean debugOkay; 2336 final SecurityManager sm = System.getSecurityManager(); 2337 if (sm != null) { 2338 try { 2339 sm.checkPermission(new RuntimePermission(Context.NASHORN_DEBUG_MODE)); 2340 debugOkay = true; 2341 } catch (final SecurityException ignored) { 2342 // if no permission, don't initialize Debug object 2343 debugOkay = false; 2344 } 2345 2346 } else { 2347 debugOkay = true; 2348 } 2349 2350 if (debugOkay) { 2351 initDebug(); 2352 } 2353 } 2354 2355 copyBuiltins(); 2356 2357 // expose script (command line) arguments as "arguments" property of global 2358 arguments = wrapAsObject(env.getArguments().toArray()); 2359 if (env._scripting) { 2360 // synonym for "arguments" in scripting mode 2361 addOwnProperty("$ARG", Attribute.NOT_ENUMERABLE, arguments); 2362 } 2363 2364 if (eng != null) { 2365 // default file name 2366 addOwnProperty(ScriptEngine.FILENAME, Attribute.NOT_ENUMERABLE, null); 2367 // __noSuchProperty__ hook for ScriptContext search of missing variables 2368 final ScriptFunction noSuchProp = ScriptFunction.createStrictBuiltin(NO_SUCH_PROPERTY_NAME, NO_SUCH_PROPERTY); 2369 addOwnProperty(NO_SUCH_PROPERTY_NAME, Attribute.NOT_ENUMERABLE, noSuchProp); 2370 } 2371 } 2372 2373 private void initErrorObjects() { 2374 // Error objects 2375 this.builtinError = initConstructor("Error", ScriptFunction.class); 2376 final ScriptObject errorProto = getErrorPrototype(); 2377 2378 // Nashorn specific accessors on Error.prototype - stack, lineNumber, columnNumber and fileName 2379 final ScriptFunction getStack = ScriptFunction.createBuiltin("getStack", NativeError.GET_STACK); 2380 final ScriptFunction setStack = ScriptFunction.createBuiltin("setStack", NativeError.SET_STACK); 2381 errorProto.addOwnProperty("stack", Attribute.NOT_ENUMERABLE, getStack, setStack); 2382 final ScriptFunction getLineNumber = ScriptFunction.createBuiltin("getLineNumber", NativeError.GET_LINENUMBER); 2383 final ScriptFunction setLineNumber = ScriptFunction.createBuiltin("setLineNumber", NativeError.SET_LINENUMBER); 2384 errorProto.addOwnProperty("lineNumber", Attribute.NOT_ENUMERABLE, getLineNumber, setLineNumber); 2385 final ScriptFunction getColumnNumber = ScriptFunction.createBuiltin("getColumnNumber", NativeError.GET_COLUMNNUMBER); 2386 final ScriptFunction setColumnNumber = ScriptFunction.createBuiltin("setColumnNumber", NativeError.SET_COLUMNNUMBER); 2387 errorProto.addOwnProperty("columnNumber", Attribute.NOT_ENUMERABLE, getColumnNumber, setColumnNumber); 2388 final ScriptFunction getFileName = ScriptFunction.createBuiltin("getFileName", NativeError.GET_FILENAME); 2389 final ScriptFunction setFileName = ScriptFunction.createBuiltin("setFileName", NativeError.SET_FILENAME); 2390 errorProto.addOwnProperty("fileName", Attribute.NOT_ENUMERABLE, getFileName, setFileName); 2391 2392 // ECMA 15.11.4.2 Error.prototype.name 2393 // Error.prototype.name = "Error"; 2394 errorProto.set(NativeError.NAME, "Error", 0); 2395 // ECMA 15.11.4.3 Error.prototype.message 2396 // Error.prototype.message = ""; 2397 errorProto.set(NativeError.MESSAGE, "", 0); 2398 2399 tagBuiltinProperties("Error", builtinError); 2400 2401 this.builtinReferenceError = initErrorSubtype("ReferenceError", errorProto); 2402 this.builtinSyntaxError = initErrorSubtype("SyntaxError", errorProto); 2403 this.builtinTypeError = initErrorSubtype("TypeError", errorProto); 2404 } 2405 2406 private ScriptFunction initErrorSubtype(final String name, final ScriptObject errorProto) { 2407 final ScriptFunction cons = initConstructor(name, ScriptFunction.class); 2408 final ScriptObject prototype = ScriptFunction.getPrototype(cons); 2409 prototype.set(NativeError.NAME, name, 0); 2410 prototype.set(NativeError.MESSAGE, "", 0); 2411 prototype.setInitialProto(errorProto); 2412 tagBuiltinProperties(name, cons); 2413 return cons; 2414 } 2415 2416 private void initJavaAccess() { 2417 final ScriptObject objectProto = getObjectPrototype(); 2418 this.builtinPackages = new NativeJavaPackage("", objectProto); 2419 this.builtinCom = new NativeJavaPackage("com", objectProto); 2420 this.builtinEdu = new NativeJavaPackage("edu", objectProto); 2421 this.builtinJava = new NativeJavaPackage("java", objectProto); 2422 this.builtinJavafx = new NativeJavaPackage("javafx", objectProto); 2423 this.builtinJavax = new NativeJavaPackage("javax", objectProto); 2424 this.builtinOrg = new NativeJavaPackage("org", objectProto); 2425 } 2426 2427 private void initScripting(final ScriptEnvironment scriptEnv) { 2428 ScriptObject value; 2429 value = ScriptFunction.createBuiltin("readLine", ScriptingFunctions.READLINE); 2430 addOwnProperty("readLine", Attribute.NOT_ENUMERABLE, value); 2431 2432 value = ScriptFunction.createBuiltin("readFully", ScriptingFunctions.READFULLY); 2433 addOwnProperty("readFully", Attribute.NOT_ENUMERABLE, value); 2434 2435 final String execName = ScriptingFunctions.EXEC_NAME; 2436 value = ScriptFunction.createBuiltin(execName, ScriptingFunctions.EXEC); 2437 value.addOwnProperty(ScriptingFunctions.THROW_ON_ERROR_NAME, Attribute.NOT_ENUMERABLE, false); 2438 2439 addOwnProperty(execName, Attribute.NOT_ENUMERABLE, value); 2440 2441 // Nashorn extension: global.echo (scripting-mode-only) 2442 // alias for "print" 2443 value = (ScriptObject)get("print"); 2444 addOwnProperty("echo", Attribute.NOT_ENUMERABLE, value); 2445 2446 // Nashorn extension: global.$OPTIONS (scripting-mode-only) 2447 final ScriptObject options = newObject(); 2448 copyOptions(options, scriptEnv); 2449 addOwnProperty("$OPTIONS", Attribute.NOT_ENUMERABLE, options); 2450 2451 // Nashorn extension: global.$ENV (scripting-mode-only) 2452 if (System.getSecurityManager() == null) { 2453 // do not fill $ENV if we have a security manager around 2454 // Retrieve current state of ENV variables. 2455 final ScriptObject env = newObject(); 2456 env.putAll(System.getenv(), scriptEnv._strict); 2457 2458 // Some platforms, e.g., Windows, do not define the PWD environment 2459 // variable, so that the $ENV.PWD property needs to be explicitly 2460 // set. 2461 if (!env.containsKey(ScriptingFunctions.PWD_NAME)) { 2462 env.put(ScriptingFunctions.PWD_NAME, System.getProperty("user.dir"), scriptEnv._strict); 2463 } 2464 2465 addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, env); 2466 } else { 2467 addOwnProperty(ScriptingFunctions.ENV_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED); 2468 } 2469 2470 // add other special properties for exec support 2471 addOwnProperty(ScriptingFunctions.OUT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED); 2472 addOwnProperty(ScriptingFunctions.ERR_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED); 2473 addOwnProperty(ScriptingFunctions.EXIT_NAME, Attribute.NOT_ENUMERABLE, UNDEFINED); 2474 } 2475 2476 private static void copyOptions(final ScriptObject options, final ScriptEnvironment scriptEnv) { 2477 for (final Field f : scriptEnv.getClass().getFields()) { 2478 try { 2479 options.set(f.getName(), f.get(scriptEnv), 0); 2480 } catch (final IllegalArgumentException | IllegalAccessException exp) { 2481 throw new RuntimeException(exp); 2482 } 2483 } 2484 } 2485 2486 private void copyBuiltins() { 2487 this.array = this.builtinArray; 2488 this._boolean = this.builtinBoolean; 2489 this.error = this.builtinError; 2490 this.function = this.builtinFunction; 2491 this.com = this.builtinCom; 2492 this.edu = this.builtinEdu; 2493 this.java = this.builtinJava; 2494 this.javafx = this.builtinJavafx; 2495 this.javax = this.builtinJavax; 2496 this.org = this.builtinOrg; 2497 this.math = this.builtinMath; 2498 this.number = this.builtinNumber; 2499 this.object = this.builtinObject; 2500 this.packages = this.builtinPackages; 2501 this.referenceError = this.builtinReferenceError; 2502 this.string = this.builtinString; 2503 this.syntaxError = this.builtinSyntaxError; 2504 this.typeError = this.builtinTypeError; 2505 } 2506 2507 private void initDebug() { 2508 this.addOwnProperty("Debug", Attribute.NOT_ENUMERABLE, initConstructor("Debug", ScriptObject.class)); 2509 } 2510 2511 private Object printImpl(final boolean newLine, final Object... objects) { 2512 final ScriptContext sc = currentContext(); 2513 @SuppressWarnings("resource") 2514 final PrintWriter out = sc != null? new PrintWriter(sc.getWriter()) : getContext().getEnv().getOut(); 2515 final StringBuilder sb = new StringBuilder(); 2516 2517 for (final Object obj : objects) { 2518 if (sb.length() != 0) { 2519 sb.append(' '); 2520 } 2521 2522 sb.append(JSType.toString(obj)); 2523 } 2524 2525 // Print all at once to ensure thread friendly result. 2526 if (newLine) { 2527 out.println(sb.toString()); 2528 } else { 2529 out.print(sb.toString()); 2530 } 2531 2532 out.flush(); 2533 2534 return UNDEFINED; 2535 } 2536 2537 private <T extends ScriptObject> T initConstructor(final String name, final Class<T> clazz) { 2538 try { 2539 // Assuming class name pattern for built-in JS constructors. 2540 final StringBuilder sb = new StringBuilder("jdk.nashorn.internal.objects."); 2541 2542 sb.append("Native"); 2543 sb.append(name); 2544 sb.append("$Constructor"); 2545 2546 final Class<?> funcClass = Class.forName(sb.toString()); 2547 final T res = clazz.cast(funcClass.newInstance()); 2548 2549 if (res instanceof ScriptFunction) { 2550 // All global constructor prototypes are not-writable, 2551 // not-enumerable and not-configurable. 2552 final ScriptFunction func = (ScriptFunction)res; 2553 func.modifyOwnProperty(func.getProperty("prototype"), Attribute.NON_ENUMERABLE_CONSTANT); 2554 } 2555 2556 if (res.getProto() == null) { 2557 res.setInitialProto(getObjectPrototype()); 2558 } 2559 2560 res.setIsBuiltin(); 2561 2562 return res; 2563 } catch (final ClassNotFoundException | InstantiationException | IllegalAccessException e) { 2564 throw new RuntimeException(e); 2565 } 2566 } 2567 2568 private List<jdk.nashorn.internal.runtime.Property> extractBuiltinProperties(final String name, final ScriptObject func) { 2569 final List<jdk.nashorn.internal.runtime.Property> list = new ArrayList<>(); 2570 2571 list.addAll(Arrays.asList(func.getMap().getProperties())); 2572 2573 if (func instanceof ScriptFunction) { 2574 final ScriptObject proto = ScriptFunction.getPrototype((ScriptFunction)func); 2575 if (proto != null) { 2576 list.addAll(Arrays.asList(proto.getMap().getProperties())); 2577 } 2578 } 2579 2580 final jdk.nashorn.internal.runtime.Property prop = getProperty(name); 2581 if (prop != null) { 2582 list.add(prop); 2583 } 2584 2585 return list; 2586 } 2587 2588 /** 2589 * Given a builtin object, traverse its properties recursively and associate them with a name that 2590 * will be a key to their invalidation switchpoint. 2591 * @param name name for key 2592 * @param func builtin script object 2593 */ 2594 private void tagBuiltinProperties(final String name, final ScriptObject func) { 2595 SwitchPoint sp = context.getBuiltinSwitchPoint(name); 2596 if (sp == null) { 2597 sp = context.newBuiltinSwitchPoint(name); 2598 } 2599 2600 //get all builtin properties in this builtin object and register switchpoints keyed on the propery name, 2601 //one overwrite destroys all for now, e.g. Function.prototype.apply = 17; also destroys Function.prototype.call etc 2602 for (final jdk.nashorn.internal.runtime.Property prop : extractBuiltinProperties(name, func)) { 2603 prop.setBuiltinSwitchPoint(sp); 2604 } 2605 } 2606 2607 // Function and Object constructors are inter-dependent. Also, 2608 // Function.prototype 2609 // functions are not properly initialized. We fix the references here. 2610 // NOTE: be careful if you want to re-order the operations here. You may 2611 // have 2612 // to play with object references carefully!! 2613 private void initFunctionAndObject() { 2614 // First-n-foremost is Function 2615 2616 this.builtinFunction = initConstructor("Function", ScriptFunction.class); 2617 2618 // create global anonymous function 2619 final ScriptFunction anon = ScriptFunction.createAnonymous(); 2620 // need to copy over members of Function.prototype to anon function 2621 anon.addBoundProperties(getFunctionPrototype()); 2622 2623 // Function.prototype === Object.getPrototypeOf(Function) === 2624 // <anon-function> 2625 builtinFunction.setInitialProto(anon); 2626 builtinFunction.setPrototype(anon); 2627 anon.set("constructor", builtinFunction, 0); 2628 anon.deleteOwnProperty(anon.getMap().findProperty("prototype")); 2629 2630 // use "getter" so that [[ThrowTypeError]] function's arity is 0 - as specified in step 10 of section 13.2.3 2631 this.typeErrorThrower = ScriptFunction.createBuiltin("TypeErrorThrower", Lookup.TYPE_ERROR_THROWER_GETTER); 2632 typeErrorThrower.preventExtensions(); 2633 2634 // now initialize Object 2635 this.builtinObject = initConstructor("Object", ScriptFunction.class); 2636 final ScriptObject ObjectPrototype = getObjectPrototype(); 2637 // Object.getPrototypeOf(Function.prototype) === Object.prototype 2638 anon.setInitialProto(ObjectPrototype); 2639 2640 // ES6 draft compliant __proto__ property of Object.prototype 2641 // accessors on Object.prototype for "__proto__" 2642 final ScriptFunction getProto = ScriptFunction.createBuiltin("getProto", NativeObject.GET__PROTO__); 2643 final ScriptFunction setProto = ScriptFunction.createBuiltin("setProto", NativeObject.SET__PROTO__); 2644 ObjectPrototype.addOwnProperty("__proto__", Attribute.NOT_ENUMERABLE, getProto, setProto); 2645 2646 // Function valued properties of Function.prototype were not properly 2647 // initialized. Because, these were created before global.function and 2648 // global.object were not initialized. 2649 jdk.nashorn.internal.runtime.Property[] properties = getFunctionPrototype().getMap().getProperties(); 2650 for (final jdk.nashorn.internal.runtime.Property property : properties) { 2651 final Object key = property.getKey(); 2652 final Object value = builtinFunction.get(key); 2653 2654 if (value instanceof ScriptFunction && value != anon) { 2655 final ScriptFunction func = (ScriptFunction)value; 2656 func.setInitialProto(getFunctionPrototype()); 2657 final ScriptObject prototype = ScriptFunction.getPrototype(func); 2658 if (prototype != null) { 2659 prototype.setInitialProto(ObjectPrototype); 2660 } 2661 } 2662 } 2663 2664 // For function valued properties of Object and Object.prototype, make 2665 // sure prototype's proto chain ends with Object.prototype 2666 for (final jdk.nashorn.internal.runtime.Property property : builtinObject.getMap().getProperties()) { 2667 final Object key = property.getKey(); 2668 final Object value = builtinObject.get(key); 2669 2670 if (value instanceof ScriptFunction) { 2671 final ScriptFunction func = (ScriptFunction)value; 2672 final ScriptObject prototype = ScriptFunction.getPrototype(func); 2673 if (prototype != null) { 2674 prototype.setInitialProto(ObjectPrototype); 2675 } 2676 } 2677 } 2678 2679 properties = getObjectPrototype().getMap().getProperties(); 2680 2681 for (final jdk.nashorn.internal.runtime.Property property : properties) { 2682 final Object key = property.getKey(); 2683 if (key.equals("constructor")) { 2684 continue; 2685 } 2686 2687 final Object value = ObjectPrototype.get(key); 2688 if (value instanceof ScriptFunction) { 2689 final ScriptFunction func = (ScriptFunction)value; 2690 final ScriptObject prototype = ScriptFunction.getPrototype(func); 2691 if (prototype != null) { 2692 prototype.setInitialProto(ObjectPrototype); 2693 } 2694 } 2695 } 2696 2697 tagBuiltinProperties("Object", builtinObject); 2698 tagBuiltinProperties("Function", builtinFunction); 2699 tagBuiltinProperties("Function", anon); 2700 } 2701 2702 private static MethodHandle findOwnMH_S(final String name, final Class<?> rtype, final Class<?>... types) { 2703 return MH.findStatic(MethodHandles.lookup(), Global.class, name, MH.type(rtype, types)); 2704 } 2705 2706 RegExpResult getLastRegExpResult() { 2707 return lastRegExpResult; 2708 } 2709 2710 void setLastRegExpResult(final RegExpResult regExpResult) { 2711 this.lastRegExpResult = regExpResult; 2712 } 2713 2714 @Override 2715 protected boolean isGlobal() { 2716 return true; 2717 } 2718 2719 /** 2720 * A class representing the ES6 global lexical scope. 2721 */ 2722 private static class LexicalScope extends ScriptObject { 2723 2724 LexicalScope(final Global global) { 2725 super(global, PropertyMap.newMap()); 2726 } 2727 2728 @Override 2729 protected GuardedInvocation findGetMethod(final CallSiteDescriptor desc, final LinkRequest request, final String operator) { 2730 return filterInvocation(super.findGetMethod(desc, request, operator)); 2731 } 2732 2733 @Override 2734 protected GuardedInvocation findSetMethod(final CallSiteDescriptor desc, final LinkRequest request) { 2735 return filterInvocation(super.findSetMethod(desc, request)); 2736 } 2737 2738 @Override 2739 protected PropertyMap addBoundProperty(final PropertyMap propMap, final ScriptObject source, final jdk.nashorn.internal.runtime.Property property, final boolean extensible) { 2740 // We override this method just to make it callable by Global 2741 return super.addBoundProperty(propMap, source, property, extensible); 2742 } 2743 2744 private static GuardedInvocation filterInvocation(final GuardedInvocation invocation) { 2745 final MethodType type = invocation.getInvocation().type(); 2746 return invocation.asType(type.changeParameterType(0, Object.class)).filterArguments(0, LEXICAL_SCOPE_FILTER); 2747 } 2748 } 2749 2750 }