1/*
2 * Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
3 * Copyright (C) 2001 Peter Kelly (pmk@post.com)
4 * Copyright (C) 2003-2018 Apple Inc. All rights reserved.
5 * Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca)
6 * Copyright (C) 2007 Maks Orlovich
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#include "config.h"
26#include "JSGlobalObjectFunctions.h"
27
28#include "CallFrame.h"
29#include "CatchScope.h"
30#include "EvalExecutable.h"
31#include "Exception.h"
32#include "IndirectEvalExecutable.h"
33#include "Interpreter.h"
34#include "IntlDateTimeFormat.h"
35#include "IntlObject.h"
36#include "JSCInlines.h"
37#include "JSFunction.h"
38#include "JSGlobalObject.h"
39#include "JSInternalPromise.h"
40#include "JSModuleLoader.h"
41#include "JSPromise.h"
42#include "JSPromiseDeferred.h"
43#include "JSString.h"
44#include "Lexer.h"
45#include "LiteralParser.h"
46#include "Nodes.h"
47#include "ObjectConstructor.h"
48#include "JSCInlines.h"
49#include "ParseInt.h"
50#include "Parser.h"
51#include "StackVisitor.h"
52#include <stdio.h>
53#include <stdlib.h>
54#include <unicode/utf8.h>
55#include <wtf/ASCIICType.h>
56#include <wtf/Assertions.h>
57#include <wtf/HexNumber.h>
58#include <wtf/MathExtras.h>
59#include <wtf/dtoa.h>
60#include <wtf/text/StringBuilder.h>
61
62namespace JSC {
63
64const ASCIILiteral ObjectProtoCalledOnNullOrUndefinedError { "Object.prototype.__proto__ called on null or undefined"_s };
65
66template<unsigned charactersCount>
67static Bitmap<256> makeCharacterBitmap(const char (&characters)[charactersCount])
68{
69 static_assert(charactersCount > 0, "Since string literal is null terminated, characterCount is always larger than 0");
70 Bitmap<256> bitmap;
71 for (unsigned i = 0; i < charactersCount - 1; ++i)
72 bitmap.set(characters[i]);
73 return bitmap;
74}
75
76template<typename CharacterType>
77static JSValue encode(ExecState* exec, const Bitmap<256>& doNotEscape, const CharacterType* characters, unsigned length)
78{
79 VM& vm = exec->vm();
80 auto scope = DECLARE_THROW_SCOPE(vm);
81
82 // 18.2.6.1.1 Runtime Semantics: Encode ( string, unescapedSet )
83 // https://tc39.github.io/ecma262/#sec-encode
84
85 auto throwException = [&scope, exec] {
86 return JSC::throwException(exec, scope, createURIError(exec, "String contained an illegal UTF-16 sequence."_s));
87 };
88
89 StringBuilder builder(StringBuilder::OverflowHandler::RecordOverflow);
90 builder.reserveCapacity(length);
91
92 // 4. Repeat
93 auto* end = characters + length;
94 for (auto* cursor = characters; cursor != end; ++cursor) {
95 auto character = *cursor;
96
97 // 4-c. If C is in unescapedSet, then
98 if (character < doNotEscape.size() && doNotEscape.get(character)) {
99 // 4-c-i. Let S be a String containing only the code unit C.
100 // 4-c-ii. Let R be a new String value computed by concatenating the previous value of R and S.
101 builder.append(static_cast<LChar>(character));
102 continue;
103 }
104
105 // 4-d-i. If the code unit value of C is not less than 0xDC00 and not greater than 0xDFFF, throw a URIError exception.
106 if (U16_IS_TRAIL(character))
107 return throwException();
108
109 // 4-d-ii. If the code unit value of C is less than 0xD800 or greater than 0xDBFF, then
110 // 4-d-ii-1. Let V be the code unit value of C.
111 UChar32 codePoint;
112 if (!U16_IS_LEAD(character))
113 codePoint = character;
114 else {
115 // 4-d-iii. Else,
116 // 4-d-iii-1. Increase k by 1.
117 ++cursor;
118
119 // 4-d-iii-2. If k equals strLen, throw a URIError exception.
120 if (cursor == end)
121 return throwException();
122
123 // 4-d-iii-3. Let kChar be the code unit value of the code unit at index k within string.
124 auto trail = *cursor;
125
126 // 4-d-iii-4. If kChar is less than 0xDC00 or greater than 0xDFFF, throw a URIError exception.
127 if (!U16_IS_TRAIL(trail))
128 return throwException();
129
130 // 4-d-iii-5. Let V be UTF16Decode(C, kChar).
131 codePoint = U16_GET_SUPPLEMENTARY(character, trail);
132 }
133
134 // 4-d-iv. Let Octets be the array of octets resulting by applying the UTF-8 transformation to V, and let L be the array size.
135 LChar utf8OctetsBuffer[U8_MAX_LENGTH];
136 unsigned utf8Length = 0;
137 // We can use U8_APPEND_UNSAFE here since codePoint is either
138 // 1. non surrogate one, correct code point.
139 // 2. correct code point generated from validated lead and trail surrogates.
140 U8_APPEND_UNSAFE(utf8OctetsBuffer, utf8Length, codePoint);
141
142 // 4-d-v. Let j be 0.
143 // 4-d-vi. Repeat, while j < L
144 for (unsigned index = 0; index < utf8Length; ++index) {
145 // 4-d-vi-1. Let jOctet be the value at index j within Octets.
146 // 4-d-vi-2. Let S be a String containing three code units "%XY" where XY are two uppercase hexadecimal digits encoding the value of jOctet.
147 // 4-d-vi-3. Let R be a new String value computed by concatenating the previous value of R and S.
148 builder.append('%');
149 appendByteAsHex(utf8OctetsBuffer[index], builder);
150 }
151 }
152
153 if (UNLIKELY(builder.hasOverflowed()))
154 return throwOutOfMemoryError(exec, scope);
155 return jsString(exec, builder.toString());
156}
157
158static JSValue encode(ExecState* exec, const Bitmap<256>& doNotEscape)
159{
160 return toStringView(exec, exec->argument(0), [&] (StringView view) {
161 if (view.is8Bit())
162 return encode(exec, doNotEscape, view.characters8(), view.length());
163 return encode(exec, doNotEscape, view.characters16(), view.length());
164 });
165}
166
167template <typename CharType>
168ALWAYS_INLINE
169static JSValue decode(ExecState* exec, const CharType* characters, int length, const Bitmap<256>& doNotUnescape, bool strict)
170{
171 VM& vm = exec->vm();
172 auto scope = DECLARE_THROW_SCOPE(vm);
173
174 StringBuilder builder(StringBuilder::OverflowHandler::RecordOverflow);
175 int k = 0;
176 UChar u = 0;
177 while (k < length) {
178 const CharType* p = characters + k;
179 CharType c = *p;
180 if (c == '%') {
181 int charLen = 0;
182 if (k <= length - 3 && isASCIIHexDigit(p[1]) && isASCIIHexDigit(p[2])) {
183 const char b0 = Lexer<CharType>::convertHex(p[1], p[2]);
184 const int sequenceLen = 1 + U8_COUNT_TRAIL_BYTES(b0);
185 if (k <= length - sequenceLen * 3) {
186 charLen = sequenceLen * 3;
187 uint8_t sequence[U8_MAX_LENGTH];
188 sequence[0] = b0;
189 for (int i = 1; i < sequenceLen; ++i) {
190 const CharType* q = p + i * 3;
191 if (q[0] == '%' && isASCIIHexDigit(q[1]) && isASCIIHexDigit(q[2]))
192 sequence[i] = Lexer<CharType>::convertHex(q[1], q[2]);
193 else {
194 charLen = 0;
195 break;
196 }
197 }
198 if (charLen != 0) {
199 UChar32 character;
200 int32_t offset = 0;
201 U8_NEXT(sequence, offset, sequenceLen, character);
202 if (character < 0)
203 charLen = 0;
204 else if (!U_IS_BMP(character)) {
205 // Convert to surrogate pair.
206 ASSERT(U_IS_SUPPLEMENTARY(character));
207 builder.append(U16_LEAD(character));
208 u = U16_TRAIL(character);
209 } else {
210 ASSERT(!U_IS_SURROGATE(character));
211 u = static_cast<UChar>(character);
212 }
213 }
214 }
215 }
216 if (charLen == 0) {
217 if (strict)
218 return throwException(exec, scope, createURIError(exec, "URI error"_s));
219 // The only case where we don't use "strict" mode is the "unescape" function.
220 // For that, it's good to support the wonky "%u" syntax for compatibility with WinIE.
221 if (k <= length - 6 && p[1] == 'u'
222 && isASCIIHexDigit(p[2]) && isASCIIHexDigit(p[3])
223 && isASCIIHexDigit(p[4]) && isASCIIHexDigit(p[5])) {
224 charLen = 6;
225 u = Lexer<UChar>::convertUnicode(p[2], p[3], p[4], p[5]);
226 }
227 }
228 if (charLen && (u >= 128 || !doNotUnescape.get(static_cast<LChar>(u)))) {
229 builder.append(u);
230 k += charLen;
231 continue;
232 }
233 }
234 k++;
235 builder.append(c);
236 }
237 if (UNLIKELY(builder.hasOverflowed()))
238 return throwOutOfMemoryError(exec, scope);
239 RELEASE_AND_RETURN(scope, jsString(&vm, builder.toString()));
240}
241
242static JSValue decode(ExecState* exec, const Bitmap<256>& doNotUnescape, bool strict)
243{
244 return toStringView(exec, exec->argument(0), [&] (StringView view) {
245 if (view.is8Bit())
246 return decode(exec, view.characters8(), view.length(), doNotUnescape, strict);
247 return decode(exec, view.characters16(), view.length(), doNotUnescape, strict);
248 });
249}
250
251static const int SizeOfInfinity = 8;
252
253template <typename CharType>
254static bool isInfinity(const CharType* data, const CharType* end)
255{
256 return (end - data) >= SizeOfInfinity
257 && data[0] == 'I'
258 && data[1] == 'n'
259 && data[2] == 'f'
260 && data[3] == 'i'
261 && data[4] == 'n'
262 && data[5] == 'i'
263 && data[6] == 't'
264 && data[7] == 'y';
265}
266
267// See ecma-262 6th 11.8.3
268template <typename CharType>
269static double jsBinaryIntegerLiteral(const CharType*& data, const CharType* end)
270{
271 // Binary number.
272 data += 2;
273 const CharType* firstDigitPosition = data;
274 double number = 0;
275 while (true) {
276 number = number * 2 + (*data - '0');
277 ++data;
278 if (data == end)
279 break;
280 if (!isASCIIBinaryDigit(*data))
281 break;
282 }
283 if (number >= mantissaOverflowLowerBound)
284 number = parseIntOverflow(firstDigitPosition, data - firstDigitPosition, 2);
285
286 return number;
287}
288
289// See ecma-262 6th 11.8.3
290template <typename CharType>
291static double jsOctalIntegerLiteral(const CharType*& data, const CharType* end)
292{
293 // Octal number.
294 data += 2;
295 const CharType* firstDigitPosition = data;
296 double number = 0;
297 while (true) {
298 number = number * 8 + (*data - '0');
299 ++data;
300 if (data == end)
301 break;
302 if (!isASCIIOctalDigit(*data))
303 break;
304 }
305 if (number >= mantissaOverflowLowerBound)
306 number = parseIntOverflow(firstDigitPosition, data - firstDigitPosition, 8);
307
308 return number;
309}
310
311// See ecma-262 6th 11.8.3
312template <typename CharType>
313static double jsHexIntegerLiteral(const CharType*& data, const CharType* end)
314{
315 // Hex number.
316 data += 2;
317 const CharType* firstDigitPosition = data;
318 double number = 0;
319 while (true) {
320 number = number * 16 + toASCIIHexValue(*data);
321 ++data;
322 if (data == end)
323 break;
324 if (!isASCIIHexDigit(*data))
325 break;
326 }
327 if (number >= mantissaOverflowLowerBound)
328 number = parseIntOverflow(firstDigitPosition, data - firstDigitPosition, 16);
329
330 return number;
331}
332
333// See ecma-262 6th 11.8.3
334template <typename CharType>
335static double jsStrDecimalLiteral(const CharType*& data, const CharType* end)
336{
337 RELEASE_ASSERT(data < end);
338
339 size_t parsedLength;
340 double number = parseDouble(data, end - data, parsedLength);
341 if (parsedLength) {
342 data += parsedLength;
343 return number;
344 }
345
346 // Check for [+-]?Infinity
347 switch (*data) {
348 case 'I':
349 if (isInfinity(data, end)) {
350 data += SizeOfInfinity;
351 return std::numeric_limits<double>::infinity();
352 }
353 break;
354
355 case '+':
356 if (isInfinity(data + 1, end)) {
357 data += SizeOfInfinity + 1;
358 return std::numeric_limits<double>::infinity();
359 }
360 break;
361
362 case '-':
363 if (isInfinity(data + 1, end)) {
364 data += SizeOfInfinity + 1;
365 return -std::numeric_limits<double>::infinity();
366 }
367 break;
368 }
369
370 // Not a number.
371 return PNaN;
372}
373
374template <typename CharType>
375static double toDouble(const CharType* characters, unsigned size)
376{
377 const CharType* endCharacters = characters + size;
378
379 // Skip leading white space.
380 for (; characters < endCharacters; ++characters) {
381 if (!isStrWhiteSpace(*characters))
382 break;
383 }
384
385 // Empty string.
386 if (characters == endCharacters)
387 return 0.0;
388
389 double number;
390 if (characters[0] == '0' && characters + 2 < endCharacters) {
391 if ((characters[1] | 0x20) == 'x' && isASCIIHexDigit(characters[2]))
392 number = jsHexIntegerLiteral(characters, endCharacters);
393 else if ((characters[1] | 0x20) == 'o' && isASCIIOctalDigit(characters[2]))
394 number = jsOctalIntegerLiteral(characters, endCharacters);
395 else if ((characters[1] | 0x20) == 'b' && isASCIIBinaryDigit(characters[2]))
396 number = jsBinaryIntegerLiteral(characters, endCharacters);
397 else
398 number = jsStrDecimalLiteral(characters, endCharacters);
399 } else
400 number = jsStrDecimalLiteral(characters, endCharacters);
401
402 // Allow trailing white space.
403 for (; characters < endCharacters; ++characters) {
404 if (!isStrWhiteSpace(*characters))
405 break;
406 }
407 if (characters != endCharacters)
408 return PNaN;
409
410 return number;
411}
412
413// See ecma-262 6th 11.8.3
414double jsToNumber(StringView s)
415{
416 unsigned size = s.length();
417
418 if (size == 1) {
419 UChar c = s[0];
420 if (isASCIIDigit(c))
421 return c - '0';
422 if (isStrWhiteSpace(c))
423 return 0;
424 return PNaN;
425 }
426
427 if (s.is8Bit())
428 return toDouble(s.characters8(), size);
429 return toDouble(s.characters16(), size);
430}
431
432static double parseFloat(StringView s)
433{
434 unsigned size = s.length();
435
436 if (size == 1) {
437 UChar c = s[0];
438 if (isASCIIDigit(c))
439 return c - '0';
440 return PNaN;
441 }
442
443 if (s.is8Bit()) {
444 const LChar* data = s.characters8();
445 const LChar* end = data + size;
446
447 // Skip leading white space.
448 for (; data < end; ++data) {
449 if (!isStrWhiteSpace(*data))
450 break;
451 }
452
453 // Empty string.
454 if (data == end)
455 return PNaN;
456
457 return jsStrDecimalLiteral(data, end);
458 }
459
460 const UChar* data = s.characters16();
461 const UChar* end = data + size;
462
463 // Skip leading white space.
464 for (; data < end; ++data) {
465 if (!isStrWhiteSpace(*data))
466 break;
467 }
468
469 // Empty string.
470 if (data == end)
471 return PNaN;
472
473 return jsStrDecimalLiteral(data, end);
474}
475
476EncodedJSValue JSC_HOST_CALL globalFuncEval(ExecState* exec)
477{
478 VM& vm = exec->vm();
479 auto scope = DECLARE_THROW_SCOPE(vm);
480
481 JSValue x = exec->argument(0);
482 if (!x.isString())
483 return JSValue::encode(x);
484
485 JSGlobalObject* globalObject = exec->lexicalGlobalObject();
486 if (!globalObject->evalEnabled()) {
487 throwException(exec, scope, createEvalError(exec, globalObject->evalDisabledErrorMessage()));
488 return JSValue::encode(jsUndefined());
489 }
490
491 String s = asString(x)->value(exec);
492 RETURN_IF_EXCEPTION(scope, encodedJSValue());
493
494 JSValue parsedObject;
495 if (s.is8Bit()) {
496 LiteralParser<LChar> preparser(exec, s.characters8(), s.length(), NonStrictJSON);
497 parsedObject = preparser.tryLiteralParse();
498 } else {
499 LiteralParser<UChar> preparser(exec, s.characters16(), s.length(), NonStrictJSON);
500 parsedObject = preparser.tryLiteralParse();
501 }
502 RETURN_IF_EXCEPTION(scope, encodedJSValue());
503 if (parsedObject)
504 return JSValue::encode(parsedObject);
505
506 SourceOrigin sourceOrigin = exec->callerSourceOrigin();
507 JSGlobalObject* calleeGlobalObject = exec->jsCallee()->globalObject(vm);
508 EvalExecutable* eval = IndirectEvalExecutable::create(exec, makeSource(s, sourceOrigin), false, DerivedContextType::None, false, EvalContextType::None);
509 EXCEPTION_ASSERT(!!scope.exception() == !eval);
510 if (!eval)
511 return encodedJSValue();
512
513 RELEASE_AND_RETURN(scope, JSValue::encode(vm.interpreter->execute(eval, exec, calleeGlobalObject->globalThis(), calleeGlobalObject->globalScope())));
514}
515
516EncodedJSValue JSC_HOST_CALL globalFuncParseInt(ExecState* exec)
517{
518 JSValue value = exec->argument(0);
519 JSValue radixValue = exec->argument(1);
520
521 // Optimized handling for numbers:
522 // If the argument is 0 or a number in range 10^-6 <= n < INT_MAX+1, then parseInt
523 // results in a truncation to integer. In the case of -0, this is converted to 0.
524 //
525 // This is also a truncation for values in the range INT_MAX+1 <= n < 10^21,
526 // however these values cannot be trivially truncated to int since 10^21 exceeds
527 // even the int64_t range. Negative numbers are a little trickier, the case for
528 // values in the range -10^21 < n <= -1 are similar to those for integer, but
529 // values in the range -1 < n <= -10^-6 need to truncate to -0, not 0.
530 static const double tenToTheMinus6 = 0.000001;
531 static const double intMaxPlusOne = 2147483648.0;
532 if (value.isNumber()) {
533 double n = value.asNumber();
534 if (((n < intMaxPlusOne && n >= tenToTheMinus6) || !n) && radixValue.isUndefinedOrNull())
535 return JSValue::encode(jsNumber(static_cast<int32_t>(n)));
536 }
537
538 // If ToString throws, we shouldn't call ToInt32.
539 return toStringView(exec, value, [&] (StringView view) {
540 return JSValue::encode(jsNumber(parseInt(view, radixValue.toInt32(exec))));
541 });
542}
543
544EncodedJSValue JSC_HOST_CALL globalFuncParseFloat(ExecState* exec)
545{
546 auto viewWithString = exec->argument(0).toString(exec)->viewWithUnderlyingString(exec);
547 return JSValue::encode(jsNumber(parseFloat(viewWithString.view)));
548}
549
550EncodedJSValue JSC_HOST_CALL globalFuncDecodeURI(ExecState* exec)
551{
552 static Bitmap<256> doNotUnescapeWhenDecodingURI = makeCharacterBitmap(
553 "#$&+,/:;=?@"
554 );
555
556 return JSValue::encode(decode(exec, doNotUnescapeWhenDecodingURI, true));
557}
558
559EncodedJSValue JSC_HOST_CALL globalFuncDecodeURIComponent(ExecState* exec)
560{
561 static Bitmap<256> emptyBitmap;
562 return JSValue::encode(decode(exec, emptyBitmap, true));
563}
564
565EncodedJSValue JSC_HOST_CALL globalFuncEncodeURI(ExecState* exec)
566{
567 static Bitmap<256> doNotEscapeWhenEncodingURI = makeCharacterBitmap(
568 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
569 "abcdefghijklmnopqrstuvwxyz"
570 "0123456789"
571 "!#$&'()*+,-./:;=?@_~"
572 );
573
574 return JSValue::encode(encode(exec, doNotEscapeWhenEncodingURI));
575}
576
577EncodedJSValue JSC_HOST_CALL globalFuncEncodeURIComponent(ExecState* exec)
578{
579 static Bitmap<256> doNotEscapeWhenEncodingURIComponent = makeCharacterBitmap(
580 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
581 "abcdefghijklmnopqrstuvwxyz"
582 "0123456789"
583 "!'()*-._~"
584 );
585
586 return JSValue::encode(encode(exec, doNotEscapeWhenEncodingURIComponent));
587}
588
589EncodedJSValue JSC_HOST_CALL globalFuncEscape(ExecState* exec)
590{
591 static Bitmap<256> doNotEscape = makeCharacterBitmap(
592 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
593 "abcdefghijklmnopqrstuvwxyz"
594 "0123456789"
595 "*+-./@_"
596 );
597
598 return JSValue::encode(toStringView(exec, exec->argument(0), [&] (StringView view) {
599 StringBuilder builder;
600 if (view.is8Bit()) {
601 const LChar* c = view.characters8();
602 for (unsigned k = 0; k < view.length(); k++, c++) {
603 int u = c[0];
604 if (doNotEscape.get(static_cast<LChar>(u)))
605 builder.append(*c);
606 else {
607 builder.append('%');
608 appendByteAsHex(u, builder);
609 }
610 }
611 return jsString(exec, builder.toString());
612 }
613
614 const UChar* c = view.characters16();
615 for (unsigned k = 0; k < view.length(); k++, c++) {
616 UChar u = c[0];
617 if (u >= doNotEscape.size()) {
618 builder.appendLiteral("%u");
619 appendByteAsHex(u >> 8, builder);
620 appendByteAsHex(u & 0xFF, builder);
621 } else if (doNotEscape.get(static_cast<LChar>(u)))
622 builder.append(*c);
623 else {
624 builder.append('%');
625 appendByteAsHex(u, builder);
626 }
627 }
628
629 return jsString(exec, builder.toString());
630 }));
631}
632
633EncodedJSValue JSC_HOST_CALL globalFuncUnescape(ExecState* exec)
634{
635 return JSValue::encode(toStringView(exec, exec->argument(0), [&] (StringView view) {
636 // We use int for k and length intentionally since we would like to evaluate
637 // the condition `k <= length -6` even if length is less than 6.
638 int k = 0;
639 int length = view.length();
640
641 StringBuilder builder;
642 builder.reserveCapacity(length);
643
644 if (view.is8Bit()) {
645 const LChar* characters = view.characters8();
646 LChar convertedLChar;
647 while (k < length) {
648 const LChar* c = characters + k;
649 if (c[0] == '%' && k <= length - 6 && c[1] == 'u') {
650 if (isASCIIHexDigit(c[2]) && isASCIIHexDigit(c[3]) && isASCIIHexDigit(c[4]) && isASCIIHexDigit(c[5])) {
651 builder.append(Lexer<UChar>::convertUnicode(c[2], c[3], c[4], c[5]));
652 k += 6;
653 continue;
654 }
655 } else if (c[0] == '%' && k <= length - 3 && isASCIIHexDigit(c[1]) && isASCIIHexDigit(c[2])) {
656 convertedLChar = LChar(Lexer<LChar>::convertHex(c[1], c[2]));
657 c = &convertedLChar;
658 k += 2;
659 }
660 builder.append(*c);
661 k++;
662 }
663 } else {
664 const UChar* characters = view.characters16();
665
666 while (k < length) {
667 const UChar* c = characters + k;
668 UChar convertedUChar;
669 if (c[0] == '%' && k <= length - 6 && c[1] == 'u') {
670 if (isASCIIHexDigit(c[2]) && isASCIIHexDigit(c[3]) && isASCIIHexDigit(c[4]) && isASCIIHexDigit(c[5])) {
671 convertedUChar = Lexer<UChar>::convertUnicode(c[2], c[3], c[4], c[5]);
672 c = &convertedUChar;
673 k += 5;
674 }
675 } else if (c[0] == '%' && k <= length - 3 && isASCIIHexDigit(c[1]) && isASCIIHexDigit(c[2])) {
676 convertedUChar = UChar(Lexer<UChar>::convertHex(c[1], c[2]));
677 c = &convertedUChar;
678 k += 2;
679 }
680 k++;
681 builder.append(*c);
682 }
683 }
684
685 return jsString(exec, builder.toString());
686 }));
687}
688
689EncodedJSValue JSC_HOST_CALL globalFuncThrowTypeError(ExecState* exec)
690{
691 VM& vm = exec->vm();
692 auto scope = DECLARE_THROW_SCOPE(vm);
693 return throwVMTypeError(exec, scope);
694}
695
696EncodedJSValue JSC_HOST_CALL globalFuncThrowTypeErrorArgumentsCalleeAndCaller(ExecState* exec)
697{
698 VM& vm = exec->vm();
699 auto scope = DECLARE_THROW_SCOPE(vm);
700 return throwVMTypeError(exec, scope, "'arguments', 'callee', and 'caller' cannot be accessed in this context.");
701}
702
703EncodedJSValue JSC_HOST_CALL globalFuncMakeTypeError(ExecState* exec)
704{
705 JSGlobalObject* globalObject = exec->lexicalGlobalObject();
706 Structure* errorStructure = globalObject->errorStructure(ErrorType::TypeError);
707 return JSValue::encode(ErrorInstance::create(exec, errorStructure, exec->argument(0), nullptr, TypeNothing, false));
708}
709
710EncodedJSValue JSC_HOST_CALL globalFuncProtoGetter(ExecState* exec)
711{
712 VM& vm = exec->vm();
713 auto scope = DECLARE_THROW_SCOPE(vm);
714
715 JSValue thisValue = exec->thisValue().toThis(exec, StrictMode);
716 if (thisValue.isUndefinedOrNull())
717 return throwVMError(exec, scope, createNotAnObjectError(exec, thisValue));
718
719 JSObject* thisObject = jsDynamicCast<JSObject*>(vm, thisValue);
720 if (!thisObject) {
721 JSObject* prototype = thisValue.synthesizePrototype(exec);
722 EXCEPTION_ASSERT(!!scope.exception() == !prototype);
723 if (UNLIKELY(!prototype))
724 return JSValue::encode(JSValue());
725 return JSValue::encode(prototype);
726 }
727
728 RELEASE_AND_RETURN(scope, JSValue::encode(thisObject->getPrototype(vm, exec)));
729}
730
731EncodedJSValue JSC_HOST_CALL globalFuncProtoSetter(ExecState* exec)
732{
733 VM& vm = exec->vm();
734 auto scope = DECLARE_THROW_SCOPE(vm);
735
736 JSValue thisValue = exec->thisValue().toThis(exec, StrictMode);
737 if (thisValue.isUndefinedOrNull())
738 return throwVMTypeError(exec, scope, ObjectProtoCalledOnNullOrUndefinedError);
739
740 JSValue value = exec->argument(0);
741
742 JSObject* thisObject = jsDynamicCast<JSObject*>(vm, thisValue);
743
744 // Setting __proto__ of a primitive should have no effect.
745 if (!thisObject)
746 return JSValue::encode(jsUndefined());
747
748 // Setting __proto__ to a non-object, non-null value is silently ignored to match Mozilla.
749 if (!value.isObject() && !value.isNull())
750 return JSValue::encode(jsUndefined());
751
752 scope.release();
753 bool shouldThrowIfCantSet = true;
754 thisObject->setPrototype(vm, exec, value, shouldThrowIfCantSet);
755 return JSValue::encode(jsUndefined());
756}
757
758EncodedJSValue JSC_HOST_CALL globalFuncHostPromiseRejectionTracker(ExecState* exec)
759{
760 JSGlobalObject* globalObject = exec->lexicalGlobalObject();
761 VM& vm = globalObject->vm();
762 auto scope = DECLARE_THROW_SCOPE(vm);
763
764 if (!globalObject->globalObjectMethodTable()->promiseRejectionTracker)
765 return JSValue::encode(jsUndefined());
766
767 JSPromise* promise = jsCast<JSPromise*>(exec->argument(0));
768 JSValue operationValue = exec->argument(1);
769
770 ASSERT(operationValue.isNumber());
771 auto operation = static_cast<JSPromiseRejectionOperation>(operationValue.toUInt32(exec));
772 ASSERT(operation == JSPromiseRejectionOperation::Reject || operation == JSPromiseRejectionOperation::Handle);
773 scope.assertNoException();
774
775 globalObject->globalObjectMethodTable()->promiseRejectionTracker(globalObject, exec, promise, operation);
776 RETURN_IF_EXCEPTION(scope, { });
777
778 return JSValue::encode(jsUndefined());
779}
780
781EncodedJSValue JSC_HOST_CALL globalFuncBuiltinLog(ExecState* exec)
782{
783 dataLog(exec->argument(0).toWTFString(exec), "\n");
784 return JSValue::encode(jsUndefined());
785}
786
787EncodedJSValue JSC_HOST_CALL globalFuncBuiltinDescribe(ExecState* exec)
788{
789 return JSValue::encode(jsString(exec, toString(exec->argument(0))));
790}
791
792EncodedJSValue JSC_HOST_CALL globalFuncImportModule(ExecState* exec)
793{
794 VM& vm = exec->vm();
795 auto throwScope = DECLARE_THROW_SCOPE(vm);
796
797 auto* globalObject = exec->lexicalGlobalObject();
798
799 auto* promise = JSPromiseDeferred::tryCreate(exec, globalObject);
800 RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
801
802 auto catchScope = DECLARE_CATCH_SCOPE(vm);
803 auto reject = [&] (JSValue rejectionReason) {
804 catchScope.clearException();
805 promise->reject(exec, rejectionReason);
806 catchScope.clearException();
807 return JSValue::encode(promise->promise());
808 };
809
810 auto sourceOrigin = exec->callerSourceOrigin();
811 RELEASE_ASSERT(exec->argumentCount() == 1);
812 auto* specifier = exec->uncheckedArgument(0).toString(exec);
813 if (Exception* exception = catchScope.exception())
814 return reject(exception->value());
815
816 // We always specify parameters as undefined. Once dynamic import() starts accepting fetching parameters,
817 // we should retrieve this from the arguments.
818 JSValue parameters = jsUndefined();
819 auto* internalPromise = globalObject->moduleLoader()->importModule(exec, specifier, parameters, sourceOrigin);
820 if (Exception* exception = catchScope.exception())
821 return reject(exception->value());
822 promise->resolve(exec, internalPromise);
823
824 catchScope.clearException();
825 return JSValue::encode(promise->promise());
826}
827
828EncodedJSValue JSC_HOST_CALL globalFuncPropertyIsEnumerable(ExecState* exec)
829{
830 VM& vm = exec->vm();
831 auto scope = DECLARE_THROW_SCOPE(vm);
832
833 RELEASE_ASSERT(exec->argumentCount() == 2);
834 JSObject* object = jsCast<JSObject*>(exec->uncheckedArgument(0));
835 auto propertyName = exec->uncheckedArgument(1).toPropertyKey(exec);
836 RETURN_IF_EXCEPTION(scope, encodedJSValue());
837
838 scope.release();
839 PropertyDescriptor descriptor;
840 bool enumerable = object->getOwnPropertyDescriptor(exec, propertyName, descriptor) && descriptor.enumerable();
841 return JSValue::encode(jsBoolean(enumerable));
842}
843
844EncodedJSValue JSC_HOST_CALL globalFuncOwnKeys(ExecState* exec)
845{
846 VM& vm = exec->vm();
847 auto scope = DECLARE_THROW_SCOPE(vm);
848 JSObject* object = exec->argument(0).toObject(exec);
849 RETURN_IF_EXCEPTION(scope, encodedJSValue());
850 RELEASE_AND_RETURN(scope, JSValue::encode(ownPropertyKeys(exec, object, PropertyNameMode::StringsAndSymbols, DontEnumPropertiesMode::Include)));
851}
852
853#if ENABLE(INTL)
854EncodedJSValue JSC_HOST_CALL globalFuncDateTimeFormat(ExecState* exec)
855{
856 VM& vm = exec->vm();
857 auto scope = DECLARE_THROW_SCOPE(vm);
858
859 JSGlobalObject* globalObject = exec->lexicalGlobalObject();
860 IntlDateTimeFormat* dateTimeFormat = IntlDateTimeFormat::create(vm, globalObject->dateTimeFormatStructure());
861 dateTimeFormat->initializeDateTimeFormat(*exec, exec->argument(0), exec->argument(1));
862 RETURN_IF_EXCEPTION(scope, encodedJSValue());
863 double value = exec->argument(2).toNumber(exec);
864 RETURN_IF_EXCEPTION(scope, encodedJSValue());
865 RELEASE_AND_RETURN(scope, JSValue::encode(dateTimeFormat->format(*exec, value)));
866}
867#endif
868
869} // namespace JSC
870