| /* |
| * Copyright (C) 1999-2002 Harri Porten (porten@kde.org) |
| * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| * Copyright (C) 2003-2019 Apple Inc. All rights reserved. |
| * Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca) |
| * Copyright (C) 2007 Maks Orlovich |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "JSGlobalObjectFunctions.h" |
| |
| #include "CallFrame.h" |
| #include "IndirectEvalExecutable.h" |
| #include "InlineCallFrame.h" |
| #include "Interpreter.h" |
| #include "IntlDateTimeFormat.h" |
| #include "JSCInlines.h" |
| #include "JSInternalPromise.h" |
| #include "JSModuleLoader.h" |
| #include "JSPromise.h" |
| #include "JSSet.h" |
| #include "Lexer.h" |
| #include "LiteralParser.h" |
| #include "ObjectConstructor.h" |
| #include "ParseInt.h" |
| #include <stdio.h> |
| #include <wtf/ASCIICType.h> |
| #include <wtf/Assertions.h> |
| #include <wtf/HexNumber.h> |
| #include <wtf/dtoa.h> |
| #include <wtf/text/StringBuilder.h> |
| |
| namespace JSC { |
| |
| const ASCIILiteral ObjectProtoCalledOnNullOrUndefinedError { "Object.prototype.__proto__ called on null or undefined"_s }; |
| |
| template<unsigned charactersCount> |
| static Bitmap<256> makeCharacterBitmap(const char (&characters)[charactersCount]) |
| { |
| static_assert(charactersCount > 0, "Since string literal is null terminated, characterCount is always larger than 0"); |
| Bitmap<256> bitmap; |
| for (unsigned i = 0; i < charactersCount - 1; ++i) |
| bitmap.set(characters[i]); |
| return bitmap; |
| } |
| |
| template<typename CharacterType> |
| static JSValue encode(JSGlobalObject* globalObject, const Bitmap<256>& doNotEscape, const CharacterType* characters, unsigned length) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| // 18.2.6.1.1 Runtime Semantics: Encode ( string, unescapedSet ) |
| // https://tc39.github.io/ecma262/#sec-encode |
| |
| auto throwException = [&scope, globalObject] { |
| return JSC::throwException(globalObject, scope, createURIError(globalObject, "String contained an illegal UTF-16 sequence."_s)); |
| }; |
| |
| StringBuilder builder(StringBuilder::OverflowHandler::RecordOverflow); |
| builder.reserveCapacity(length); |
| |
| // 4. Repeat |
| auto* end = characters + length; |
| for (auto* cursor = characters; cursor != end; ++cursor) { |
| auto character = *cursor; |
| |
| // 4-c. If C is in unescapedSet, then |
| if (character < doNotEscape.size() && doNotEscape.get(character)) { |
| // 4-c-i. Let S be a String containing only the code unit C. |
| // 4-c-ii. Let R be a new String value computed by concatenating the previous value of R and S. |
| builder.append(static_cast<LChar>(character)); |
| continue; |
| } |
| |
| // 4-d-i. If the code unit value of C is not less than 0xDC00 and not greater than 0xDFFF, throw a URIError exception. |
| if (U16_IS_TRAIL(character)) |
| return throwException(); |
| |
| // 4-d-ii. If the code unit value of C is less than 0xD800 or greater than 0xDBFF, then |
| // 4-d-ii-1. Let V be the code unit value of C. |
| UChar32 codePoint; |
| if (!U16_IS_LEAD(character)) |
| codePoint = character; |
| else { |
| // 4-d-iii. Else, |
| // 4-d-iii-1. Increase k by 1. |
| ++cursor; |
| |
| // 4-d-iii-2. If k equals strLen, throw a URIError exception. |
| if (cursor == end) |
| return throwException(); |
| |
| // 4-d-iii-3. Let kChar be the code unit value of the code unit at index k within string. |
| auto trail = *cursor; |
| |
| // 4-d-iii-4. If kChar is less than 0xDC00 or greater than 0xDFFF, throw a URIError exception. |
| if (!U16_IS_TRAIL(trail)) |
| return throwException(); |
| |
| // 4-d-iii-5. Let V be UTF16Decode(C, kChar). |
| codePoint = U16_GET_SUPPLEMENTARY(character, trail); |
| } |
| |
| // 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. |
| LChar utf8OctetsBuffer[U8_MAX_LENGTH]; |
| unsigned utf8Length = 0; |
| // We can use U8_APPEND_UNSAFE here since codePoint is either |
| // 1. non surrogate one, correct code point. |
| // 2. correct code point generated from validated lead and trail surrogates. |
| U8_APPEND_UNSAFE(utf8OctetsBuffer, utf8Length, codePoint); |
| |
| // 4-d-v. Let j be 0. |
| // 4-d-vi. Repeat, while j < L |
| for (unsigned index = 0; index < utf8Length; ++index) { |
| // 4-d-vi-1. Let jOctet be the value at index j within Octets. |
| // 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. |
| // 4-d-vi-3. Let R be a new String value computed by concatenating the previous value of R and S. |
| builder.append('%'); |
| builder.append(hex(utf8OctetsBuffer[index], 2)); |
| } |
| } |
| |
| if (UNLIKELY(builder.hasOverflowed())) |
| return throwOutOfMemoryError(globalObject, scope); |
| return jsString(vm, builder.toString()); |
| } |
| |
| static JSValue encode(JSGlobalObject* globalObject, JSValue argument, const Bitmap<256>& doNotEscape) |
| { |
| return toStringView(globalObject, argument, [&] (StringView view) { |
| if (view.is8Bit()) |
| return encode(globalObject, doNotEscape, view.characters8(), view.length()); |
| return encode(globalObject, doNotEscape, view.characters16(), view.length()); |
| }); |
| } |
| |
| template <typename CharType> |
| ALWAYS_INLINE |
| static JSValue decode(JSGlobalObject* globalObject, const CharType* characters, int length, const Bitmap<256>& doNotUnescape, bool strict) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| StringBuilder builder(StringBuilder::OverflowHandler::RecordOverflow); |
| int k = 0; |
| UChar u = 0; |
| while (k < length) { |
| const CharType* p = characters + k; |
| CharType c = *p; |
| if (c == '%') { |
| int charLen = 0; |
| if (k <= length - 3 && isASCIIHexDigit(p[1]) && isASCIIHexDigit(p[2])) { |
| const char b0 = Lexer<CharType>::convertHex(p[1], p[2]); |
| const int sequenceLen = 1 + U8_COUNT_TRAIL_BYTES(b0); |
| if (k <= length - sequenceLen * 3) { |
| charLen = sequenceLen * 3; |
| uint8_t sequence[U8_MAX_LENGTH]; |
| sequence[0] = b0; |
| for (int i = 1; i < sequenceLen; ++i) { |
| const CharType* q = p + i * 3; |
| if (q[0] == '%' && isASCIIHexDigit(q[1]) && isASCIIHexDigit(q[2])) |
| sequence[i] = Lexer<CharType>::convertHex(q[1], q[2]); |
| else { |
| charLen = 0; |
| break; |
| } |
| } |
| if (charLen != 0) { |
| UChar32 character; |
| int32_t offset = 0; |
| U8_NEXT(sequence, offset, sequenceLen, character); |
| if (character < 0) |
| charLen = 0; |
| else if (!U_IS_BMP(character)) { |
| // Convert to surrogate pair. |
| ASSERT(U_IS_SUPPLEMENTARY(character)); |
| builder.append(U16_LEAD(character)); |
| u = U16_TRAIL(character); |
| } else { |
| ASSERT(!U_IS_SURROGATE(character)); |
| u = static_cast<UChar>(character); |
| } |
| } |
| } |
| } |
| if (charLen == 0) { |
| if (strict) |
| return throwException(globalObject, scope, createURIError(globalObject, "URI error"_s)); |
| // The only case where we don't use "strict" mode is the "unescape" function. |
| // For that, it's good to support the wonky "%u" syntax for compatibility with WinIE. |
| if (k <= length - 6 && p[1] == 'u' |
| && isASCIIHexDigit(p[2]) && isASCIIHexDigit(p[3]) |
| && isASCIIHexDigit(p[4]) && isASCIIHexDigit(p[5])) { |
| charLen = 6; |
| u = Lexer<UChar>::convertUnicode(p[2], p[3], p[4], p[5]); |
| } |
| } |
| if (charLen && (u >= 128 || !doNotUnescape.get(static_cast<LChar>(u)))) { |
| builder.append(u); |
| k += charLen; |
| continue; |
| } |
| } |
| k++; |
| builder.append(c); |
| } |
| if (UNLIKELY(builder.hasOverflowed())) |
| return throwOutOfMemoryError(globalObject, scope); |
| RELEASE_AND_RETURN(scope, jsString(vm, builder.toString())); |
| } |
| |
| static JSValue decode(JSGlobalObject* globalObject, JSValue argument, const Bitmap<256>& doNotUnescape, bool strict) |
| { |
| return toStringView(globalObject, argument, [&] (StringView view) { |
| if (view.is8Bit()) |
| return decode(globalObject, view.characters8(), view.length(), doNotUnescape, strict); |
| return decode(globalObject, view.characters16(), view.length(), doNotUnescape, strict); |
| }); |
| } |
| |
| static const int SizeOfInfinity = 8; |
| |
| template <typename CharType> |
| static bool isInfinity(const CharType* data, const CharType* end) |
| { |
| return (end - data) >= SizeOfInfinity |
| && data[0] == 'I' |
| && data[1] == 'n' |
| && data[2] == 'f' |
| && data[3] == 'i' |
| && data[4] == 'n' |
| && data[5] == 'i' |
| && data[6] == 't' |
| && data[7] == 'y'; |
| } |
| |
| // See ecma-262 6th 11.8.3 |
| template <typename CharType> |
| static double jsBinaryIntegerLiteral(const CharType*& data, const CharType* end) |
| { |
| // Binary number. |
| data += 2; |
| const CharType* firstDigitPosition = data; |
| double number = 0; |
| while (true) { |
| number = number * 2 + (*data - '0'); |
| ++data; |
| if (data == end) |
| break; |
| if (!isASCIIBinaryDigit(*data)) |
| break; |
| } |
| if (number >= mantissaOverflowLowerBound) |
| number = parseIntOverflow(firstDigitPosition, data - firstDigitPosition, 2); |
| |
| return number; |
| } |
| |
| // See ecma-262 6th 11.8.3 |
| template <typename CharType> |
| static double jsOctalIntegerLiteral(const CharType*& data, const CharType* end) |
| { |
| // Octal number. |
| data += 2; |
| const CharType* firstDigitPosition = data; |
| double number = 0; |
| while (true) { |
| number = number * 8 + (*data - '0'); |
| ++data; |
| if (data == end) |
| break; |
| if (!isASCIIOctalDigit(*data)) |
| break; |
| } |
| if (number >= mantissaOverflowLowerBound) |
| number = parseIntOverflow(firstDigitPosition, data - firstDigitPosition, 8); |
| |
| return number; |
| } |
| |
| // See ecma-262 6th 11.8.3 |
| template <typename CharType> |
| static double jsHexIntegerLiteral(const CharType*& data, const CharType* end) |
| { |
| // Hex number. |
| data += 2; |
| const CharType* firstDigitPosition = data; |
| double number = 0; |
| while (true) { |
| number = number * 16 + toASCIIHexValue(*data); |
| ++data; |
| if (data == end) |
| break; |
| if (!isASCIIHexDigit(*data)) |
| break; |
| } |
| if (number >= mantissaOverflowLowerBound) |
| number = parseIntOverflow(firstDigitPosition, data - firstDigitPosition, 16); |
| |
| return number; |
| } |
| |
| // See ecma-262 6th 11.8.3 |
| template <typename CharType> |
| static double jsStrDecimalLiteral(const CharType*& data, const CharType* end) |
| { |
| RELEASE_ASSERT(data < end); |
| |
| size_t parsedLength; |
| double number = parseDouble(data, end - data, parsedLength); |
| if (parsedLength) { |
| data += parsedLength; |
| return number; |
| } |
| |
| // Check for [+-]?Infinity |
| switch (*data) { |
| case 'I': |
| if (isInfinity(data, end)) { |
| data += SizeOfInfinity; |
| return std::numeric_limits<double>::infinity(); |
| } |
| break; |
| |
| case '+': |
| if (isInfinity(data + 1, end)) { |
| data += SizeOfInfinity + 1; |
| return std::numeric_limits<double>::infinity(); |
| } |
| break; |
| |
| case '-': |
| if (isInfinity(data + 1, end)) { |
| data += SizeOfInfinity + 1; |
| return -std::numeric_limits<double>::infinity(); |
| } |
| break; |
| } |
| |
| // Not a number. |
| return PNaN; |
| } |
| |
| template <typename CharType> |
| static double toDouble(const CharType* characters, unsigned size) |
| { |
| const CharType* endCharacters = characters + size; |
| |
| // Skip leading white space. |
| for (; characters < endCharacters; ++characters) { |
| if (!isStrWhiteSpace(*characters)) |
| break; |
| } |
| |
| // Empty string. |
| if (characters == endCharacters) |
| return 0.0; |
| |
| double number; |
| if (characters[0] == '0' && characters + 2 < endCharacters) { |
| if ((characters[1] | 0x20) == 'x' && isASCIIHexDigit(characters[2])) |
| number = jsHexIntegerLiteral(characters, endCharacters); |
| else if ((characters[1] | 0x20) == 'o' && isASCIIOctalDigit(characters[2])) |
| number = jsOctalIntegerLiteral(characters, endCharacters); |
| else if ((characters[1] | 0x20) == 'b' && isASCIIBinaryDigit(characters[2])) |
| number = jsBinaryIntegerLiteral(characters, endCharacters); |
| else |
| number = jsStrDecimalLiteral(characters, endCharacters); |
| } else |
| number = jsStrDecimalLiteral(characters, endCharacters); |
| |
| // Allow trailing white space. |
| for (; characters < endCharacters; ++characters) { |
| if (!isStrWhiteSpace(*characters)) |
| break; |
| } |
| if (characters != endCharacters) |
| return PNaN; |
| |
| return number; |
| } |
| |
| // See ecma-262 6th 11.8.3 |
| double jsToNumber(StringView s) |
| { |
| unsigned size = s.length(); |
| |
| if (size == 1) { |
| UChar c = s[0]; |
| if (isASCIIDigit(c)) |
| return c - '0'; |
| if (isStrWhiteSpace(c)) |
| return 0; |
| return PNaN; |
| } |
| |
| if (s.is8Bit()) |
| return toDouble(s.characters8(), size); |
| return toDouble(s.characters16(), size); |
| } |
| |
| static double parseFloat(StringView s) |
| { |
| unsigned size = s.length(); |
| |
| if (size == 1) { |
| UChar c = s[0]; |
| if (isASCIIDigit(c)) |
| return c - '0'; |
| return PNaN; |
| } |
| |
| if (s.is8Bit()) { |
| const LChar* data = s.characters8(); |
| const LChar* end = data + size; |
| |
| // Skip leading white space. |
| for (; data < end; ++data) { |
| if (!isStrWhiteSpace(*data)) |
| break; |
| } |
| |
| // Empty string. |
| if (data == end) |
| return PNaN; |
| |
| return jsStrDecimalLiteral(data, end); |
| } |
| |
| const UChar* data = s.characters16(); |
| const UChar* end = data + size; |
| |
| // Skip leading white space. |
| for (; data < end; ++data) { |
| if (!isStrWhiteSpace(*data)) |
| break; |
| } |
| |
| // Empty string. |
| if (data == end) |
| return PNaN; |
| |
| return jsStrDecimalLiteral(data, end); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncEval, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| JSValue x = callFrame->argument(0); |
| if (!x.isString()) |
| return JSValue::encode(x); |
| |
| if (!globalObject->evalEnabled()) { |
| throwException(globalObject, scope, createEvalError(globalObject, globalObject->evalDisabledErrorMessage())); |
| return JSValue::encode(jsUndefined()); |
| } |
| |
| String s = asString(x)->value(globalObject); |
| RETURN_IF_EXCEPTION(scope, encodedJSValue()); |
| |
| JSValue parsedObject; |
| if (s.is8Bit()) { |
| LiteralParser<LChar> preparser(globalObject, s.characters8(), s.length(), NonStrictJSON, nullptr); |
| parsedObject = preparser.tryLiteralParse(); |
| } else { |
| LiteralParser<UChar> preparser(globalObject, s.characters16(), s.length(), NonStrictJSON, nullptr); |
| parsedObject = preparser.tryLiteralParse(); |
| } |
| RETURN_IF_EXCEPTION(scope, encodedJSValue()); |
| if (parsedObject) |
| return JSValue::encode(parsedObject); |
| |
| SourceOrigin sourceOrigin = callFrame->callerSourceOrigin(vm); |
| EvalExecutable* eval = IndirectEvalExecutable::create(globalObject, makeSource(s, sourceOrigin), DerivedContextType::None, false, EvalContextType::None); |
| EXCEPTION_ASSERT(!!scope.exception() == !eval); |
| if (!eval) |
| return encodedJSValue(); |
| |
| RELEASE_AND_RETURN(scope, JSValue::encode(vm.interpreter->execute(eval, globalObject, globalObject->globalThis(), globalObject->globalScope()))); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncParseInt, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| JSValue value = callFrame->argument(0); |
| JSValue radixValue = callFrame->argument(1); |
| |
| // Optimized handling for numbers: |
| // If the argument is 0 or a number in range 10^-6 <= n < INT_MAX+1, then parseInt |
| // results in a truncation to integer. In the case of -0, this is converted to 0. |
| // |
| // This is also a truncation for values in the range INT_MAX+1 <= n < 10^21, |
| // however these values cannot be trivially truncated to int since 10^21 exceeds |
| // even the int64_t range. Negative numbers are a little trickier, the case for |
| // values in the range -10^21 < n <= -1 are similar to those for integer, but |
| // values in the range -1 < n <= -10^-6 need to truncate to -0, not 0. |
| static const double tenToTheMinus6 = 0.000001; |
| static const double intMaxPlusOne = 2147483648.0; |
| if (value.isNumber()) { |
| double n = value.asNumber(); |
| if (((n < intMaxPlusOne && n >= tenToTheMinus6) || !n) && radixValue.isUndefinedOrNull()) |
| return JSValue::encode(jsNumber(static_cast<int32_t>(n))); |
| } |
| |
| // If ToString throws, we shouldn't call ToInt32. |
| return toStringView(globalObject, value, [&] (StringView view) { |
| return JSValue::encode(jsNumber(parseInt(view, radixValue.toInt32(globalObject)))); |
| }); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncParseFloat, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| auto* jsString = callFrame->argument(0).toString(globalObject); |
| RETURN_IF_EXCEPTION(scope, { }); |
| auto viewWithString = jsString->viewWithUnderlyingString(globalObject); |
| RETURN_IF_EXCEPTION(scope, { }); |
| return JSValue::encode(jsNumber(parseFloat(viewWithString.view))); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncDecodeURI, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| static Bitmap<256> doNotUnescapeWhenDecodingURI = makeCharacterBitmap( |
| "#$&+,/:;=?@" |
| ); |
| |
| return JSValue::encode(decode(globalObject, callFrame->argument(0), doNotUnescapeWhenDecodingURI, true)); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncDecodeURIComponent, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| static Bitmap<256> emptyBitmap; |
| return JSValue::encode(decode(globalObject, callFrame->argument(0), emptyBitmap, true)); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncEncodeURI, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| static Bitmap<256> doNotEscapeWhenEncodingURI = makeCharacterBitmap( |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| "abcdefghijklmnopqrstuvwxyz" |
| "0123456789" |
| "!#$&'()*+,-./:;=?@_~" |
| ); |
| |
| return JSValue::encode(encode(globalObject, callFrame->argument(0), doNotEscapeWhenEncodingURI)); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncEncodeURIComponent, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| static Bitmap<256> doNotEscapeWhenEncodingURIComponent = makeCharacterBitmap( |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| "abcdefghijklmnopqrstuvwxyz" |
| "0123456789" |
| "!'()*-._~" |
| ); |
| |
| return JSValue::encode(encode(globalObject, callFrame->argument(0), doNotEscapeWhenEncodingURIComponent)); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncEscape, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| static Bitmap<256> doNotEscape = makeCharacterBitmap( |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| "abcdefghijklmnopqrstuvwxyz" |
| "0123456789" |
| "*+-./@_" |
| ); |
| |
| return JSValue::encode(toStringView(globalObject, callFrame->argument(0), [&] (StringView view) { |
| VM& vm = globalObject->vm(); |
| StringBuilder builder; |
| if (view.is8Bit()) { |
| const LChar* c = view.characters8(); |
| for (unsigned k = 0; k < view.length(); k++, c++) { |
| int u = c[0]; |
| if (doNotEscape.get(static_cast<LChar>(u))) |
| builder.append(*c); |
| else { |
| builder.append('%'); |
| builder.append(hex(u, 2)); |
| } |
| } |
| return jsString(vm, builder.toString()); |
| } |
| |
| const UChar* c = view.characters16(); |
| for (unsigned k = 0; k < view.length(); k++, c++) { |
| UChar u = c[0]; |
| if (u >= doNotEscape.size()) { |
| builder.appendLiteral("%u"); |
| builder.append(hex(static_cast<unsigned char>(u >> 8), 2)); |
| builder.append(hex(static_cast<unsigned char>(u & 0xFF), 2)); |
| } else if (doNotEscape.get(static_cast<LChar>(u))) |
| builder.append(*c); |
| else { |
| builder.append('%'); |
| builder.append(hex(static_cast<unsigned char>(u), 2)); |
| } |
| } |
| |
| return jsString(vm, builder.toString()); |
| })); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncUnescape, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| return JSValue::encode(toStringView(globalObject, callFrame->argument(0), [&] (StringView view) { |
| // We use int for k and length intentionally since we would like to evaluate |
| // the condition `k <= length -6` even if length is less than 6. |
| int k = 0; |
| int length = view.length(); |
| |
| StringBuilder builder; |
| builder.reserveCapacity(length); |
| |
| if (view.is8Bit()) { |
| const LChar* characters = view.characters8(); |
| LChar convertedLChar; |
| while (k < length) { |
| const LChar* c = characters + k; |
| if (c[0] == '%' && k <= length - 6 && c[1] == 'u') { |
| if (isASCIIHexDigit(c[2]) && isASCIIHexDigit(c[3]) && isASCIIHexDigit(c[4]) && isASCIIHexDigit(c[5])) { |
| builder.append(Lexer<UChar>::convertUnicode(c[2], c[3], c[4], c[5])); |
| k += 6; |
| continue; |
| } |
| } else if (c[0] == '%' && k <= length - 3 && isASCIIHexDigit(c[1]) && isASCIIHexDigit(c[2])) { |
| convertedLChar = LChar(Lexer<LChar>::convertHex(c[1], c[2])); |
| c = &convertedLChar; |
| k += 2; |
| } |
| builder.append(*c); |
| k++; |
| } |
| } else { |
| const UChar* characters = view.characters16(); |
| |
| while (k < length) { |
| const UChar* c = characters + k; |
| UChar convertedUChar; |
| if (c[0] == '%' && k <= length - 6 && c[1] == 'u') { |
| if (isASCIIHexDigit(c[2]) && isASCIIHexDigit(c[3]) && isASCIIHexDigit(c[4]) && isASCIIHexDigit(c[5])) { |
| convertedUChar = Lexer<UChar>::convertUnicode(c[2], c[3], c[4], c[5]); |
| c = &convertedUChar; |
| k += 5; |
| } |
| } else if (c[0] == '%' && k <= length - 3 && isASCIIHexDigit(c[1]) && isASCIIHexDigit(c[2])) { |
| convertedUChar = UChar(Lexer<UChar>::convertHex(c[1], c[2])); |
| c = &convertedUChar; |
| k += 2; |
| } |
| k++; |
| builder.append(*c); |
| } |
| } |
| |
| return jsString(globalObject->vm(), builder.toString()); |
| })); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncThrowTypeError, (JSGlobalObject* globalObject, CallFrame*)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| return throwVMTypeError(globalObject, scope); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncThrowTypeErrorArgumentsCalleeAndCaller, (JSGlobalObject* globalObject, CallFrame*)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| return throwVMTypeError(globalObject, scope, "'arguments', 'callee', and 'caller' cannot be accessed in this context."); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncMakeTypeError, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| Structure* errorStructure = globalObject->errorStructure(ErrorType::TypeError); |
| return JSValue::encode(ErrorInstance::create(globalObject, errorStructure, callFrame->argument(0), jsUndefined(), nullptr, TypeNothing, ErrorType::TypeError, false)); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncProtoGetter, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| JSValue thisValue = callFrame->thisValue().toThis(globalObject, ECMAMode::strict()); |
| return JSValue::encode(thisValue.getPrototype(globalObject)); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncProtoSetter, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| JSValue thisValue = callFrame->thisValue().toThis(globalObject, ECMAMode::strict()); |
| if (thisValue.isUndefinedOrNull()) |
| return throwVMTypeError(globalObject, scope, ObjectProtoCalledOnNullOrUndefinedError); |
| |
| JSValue value = callFrame->argument(0); |
| |
| JSObject* thisObject = jsDynamicCast<JSObject*>(vm, thisValue); |
| |
| // Setting __proto__ of a primitive should have no effect. |
| if (!thisObject) |
| return JSValue::encode(jsUndefined()); |
| |
| // Setting __proto__ to a non-object, non-null value is silently ignored to match Mozilla. |
| if (!value.isObject() && !value.isNull()) |
| return JSValue::encode(jsUndefined()); |
| |
| scope.release(); |
| bool shouldThrowIfCantSet = true; |
| thisObject->setPrototype(vm, globalObject, value, shouldThrowIfCantSet); |
| return JSValue::encode(jsUndefined()); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncSetPrototypeDirect, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| |
| JSValue value = callFrame->uncheckedArgument(0); |
| if (value.isObject() || value.isNull()) { |
| JSObject* object = asObject(callFrame->thisValue()); |
| object->setPrototypeDirect(vm, value); |
| } |
| |
| return JSValue::encode(jsUndefined()); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncSetPrototypeDirectOrThrow, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| JSValue value = callFrame->uncheckedArgument(0); |
| if (!value.isObject() && !value.isNull()) |
| return throwVMError(globalObject, scope, createInvalidPrototypeError(globalObject, value)); |
| |
| JSObject* object = asObject(callFrame->thisValue()); |
| object->setPrototypeDirect(vm, value); |
| |
| return JSValue::encode(jsUndefined()); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncHostPromiseRejectionTracker, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| JSPromise* promise = jsCast<JSPromise*>(callFrame->argument(0)); |
| |
| // InternalPromises should not be exposed to user scripts. |
| if (jsDynamicCast<JSInternalPromise*>(vm, promise)) |
| return JSValue::encode(jsUndefined()); |
| |
| JSValue operationValue = callFrame->argument(1); |
| |
| ASSERT(operationValue.isNumber()); |
| auto operation = static_cast<JSPromiseRejectionOperation>(operationValue.toUInt32(globalObject)); |
| ASSERT(operation == JSPromiseRejectionOperation::Reject || operation == JSPromiseRejectionOperation::Handle); |
| scope.assertNoException(); |
| |
| if (globalObject->globalObjectMethodTable()->promiseRejectionTracker) |
| globalObject->globalObjectMethodTable()->promiseRejectionTracker(globalObject, promise, operation); |
| else { |
| switch (operation) { |
| case JSPromiseRejectionOperation::Reject: |
| vm.promiseRejected(promise); |
| break; |
| case JSPromiseRejectionOperation::Handle: |
| // do nothing |
| break; |
| } |
| } |
| RETURN_IF_EXCEPTION(scope, { }); |
| |
| return JSValue::encode(jsUndefined()); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncBuiltinLog, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| dataLog(callFrame->argument(0).toWTFString(globalObject), "\n"); |
| return JSValue::encode(jsUndefined()); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncBuiltinDescribe, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| return JSValue::encode(jsString(globalObject->vm(), toString(callFrame->argument(0)))); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncImportModule, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| |
| auto* promise = JSPromise::create(vm, globalObject->promiseStructure()); |
| |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| auto sourceOrigin = callFrame->callerSourceOrigin(vm); |
| RELEASE_ASSERT(callFrame->argumentCount() == 1); |
| auto* specifier = callFrame->uncheckedArgument(0).toString(globalObject); |
| RETURN_IF_EXCEPTION(scope, JSValue::encode(promise->rejectWithCaughtException(globalObject, scope))); |
| |
| // We always specify parameters as undefined. Once dynamic import() starts accepting fetching parameters, |
| // we should retrieve this from the arguments. |
| JSValue parameters = jsUndefined(); |
| auto* internalPromise = globalObject->moduleLoader()->importModule(globalObject, specifier, parameters, sourceOrigin); |
| RETURN_IF_EXCEPTION(scope, JSValue::encode(promise->rejectWithCaughtException(globalObject, scope))); |
| |
| scope.release(); |
| promise->resolve(globalObject, internalPromise); |
| return JSValue::encode(promise); |
| } |
| |
| static bool canPerformFastPropertyEnumerationForCopyDataProperties(Structure* structure) |
| { |
| if (structure->typeInfo().overridesGetOwnPropertySlot()) |
| return false; |
| if (structure->typeInfo().overridesAnyFormOfGetOwnPropertyNames()) |
| return false; |
| // FIXME: Indexed properties can be handled. |
| // https://bugs.webkit.org/show_bug.cgi?id=185358 |
| if (hasIndexedProperties(structure->indexingType())) |
| return false; |
| if (structure->hasGetterSetterProperties()) |
| return false; |
| if (structure->hasCustomGetterSetterProperties()) |
| return false; |
| if (structure->isUncacheableDictionary()) |
| return false; |
| return true; |
| }; |
| |
| static CodeBlock* getCallerCodeBlock(CallFrame* callFrame) |
| { |
| CallFrame* callerFrame = callFrame->callerFrame(); |
| CodeOrigin codeOrigin = callerFrame->codeOrigin(); |
| if (codeOrigin && codeOrigin.inlineCallFrame()) |
| return baselineCodeBlockForInlineCallFrame(codeOrigin.inlineCallFrame()); |
| return callerFrame->codeBlock(); |
| } |
| |
| // https://tc39.es/ecma262/#sec-copydataproperties |
| JSC_DEFINE_HOST_FUNCTION(globalFuncCopyDataProperties, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| JSFinalObject* target = jsCast<JSFinalObject*>(callFrame->thisValue()); |
| ASSERT(target->isStructureExtensible(vm)); |
| |
| JSValue sourceValue = callFrame->uncheckedArgument(0); |
| if (sourceValue.isUndefinedOrNull()) |
| return JSValue::encode(target); |
| |
| JSObject* source = sourceValue.toObject(globalObject); |
| scope.assertNoException(); |
| |
| UnlinkedCodeBlock* unlinkedCodeBlock = nullptr; |
| const IdentifierSet* excludedSet = nullptr; |
| Optional<IdentifierSet> newlyCreatedSet; |
| if (callFrame->argumentCount() > 1) { |
| int32_t setIndex = callFrame->uncheckedArgument(1).asUInt32AsAnyInt(); |
| CodeBlock* codeBlock = getCallerCodeBlock(callFrame); |
| ASSERT(codeBlock); |
| unlinkedCodeBlock = codeBlock->unlinkedCodeBlock(); |
| excludedSet = &unlinkedCodeBlock->constantIdentifierSets()[setIndex]; |
| if (callFrame->argumentCount() > 2) { |
| newlyCreatedSet.emplace(*excludedSet); |
| for (unsigned index = 2; index < callFrame->argumentCount(); ++index) { |
| // This isn't observable since ObjectPatternNode::bindValue() also performs ToPropertyKey. |
| auto propertyName = callFrame->uncheckedArgument(index).toPropertyKey(globalObject); |
| RETURN_IF_EXCEPTION(scope, { }); |
| newlyCreatedSet->add(propertyName.impl()); |
| } |
| excludedSet = &newlyCreatedSet.value(); |
| } |
| } |
| |
| auto isPropertyNameExcluded = [&] (PropertyName propertyName) -> bool { |
| ASSERT(!propertyName.isPrivateName()); |
| if (!excludedSet) |
| return false; |
| return excludedSet->contains(propertyName.uid()); |
| }; |
| |
| if (!source->staticPropertiesReified(vm)) { |
| source->reifyAllStaticProperties(globalObject); |
| RETURN_IF_EXCEPTION(scope, { }); |
| } |
| |
| if (canPerformFastPropertyEnumerationForCopyDataProperties(source->structure(vm))) { |
| Vector<RefPtr<UniquedStringImpl>, 8> properties; |
| MarkedArgumentBuffer values; |
| |
| // FIXME: It doesn't seem like we should have to do this in two phases, but |
| // we're running into crashes where it appears that source is transitioning |
| // under us, and even ends up in a state where it has a null butterfly. My |
| // leading hypothesis here is that we fire some value replacement watchpoint |
| // that ends up transitioning the structure underneath us. |
| // https://bugs.webkit.org/show_bug.cgi?id=187837 |
| |
| source->structure(vm)->forEachProperty(vm, [&] (const PropertyMapEntry& entry) -> bool { |
| PropertyName propertyName(entry.key); |
| if (propertyName.isPrivateName()) |
| return true; |
| |
| if (entry.attributes & PropertyAttribute::DontEnum) |
| return true; |
| |
| if (isPropertyNameExcluded(propertyName)) |
| return true; |
| |
| properties.append(entry.key); |
| values.appendWithCrashOnOverflow(source->getDirect(entry.offset)); |
| return true; |
| }); |
| |
| RETURN_IF_EXCEPTION(scope, { }); |
| |
| for (size_t i = 0; i < properties.size(); ++i) { |
| // FIXME: We could put properties in a batching manner to accelerate CopyDataProperties more. |
| // https://bugs.webkit.org/show_bug.cgi?id=185358 |
| target->putDirect(vm, properties[i].get(), values.at(i)); |
| } |
| } else { |
| PropertyNameArray propertyNames(vm, PropertyNameMode::StringsAndSymbols, PrivateSymbolMode::Exclude); |
| source->methodTable(vm)->getOwnPropertyNames(source, globalObject, propertyNames, DontEnumPropertiesMode::Include); |
| RETURN_IF_EXCEPTION(scope, { }); |
| |
| for (const auto& propertyName : propertyNames) { |
| if (isPropertyNameExcluded(propertyName)) |
| continue; |
| |
| PropertySlot slot(source, PropertySlot::InternalMethodType::GetOwnProperty); |
| bool hasProperty = source->methodTable(vm)->getOwnPropertySlot(source, globalObject, propertyName, slot); |
| RETURN_IF_EXCEPTION(scope, { }); |
| if (!hasProperty) |
| continue; |
| if (slot.attributes() & PropertyAttribute::DontEnum) |
| continue; |
| |
| JSValue value; |
| if (LIKELY(!slot.isTaintedByOpaqueObject())) |
| value = slot.getValue(globalObject, propertyName); |
| else |
| value = source->get(globalObject, propertyName); |
| RETURN_IF_EXCEPTION(scope, { }); |
| |
| target->putDirectMayBeIndex(globalObject, propertyName, value); |
| RETURN_IF_EXCEPTION(scope, { }); |
| } |
| } |
| |
| ensureStillAliveHere(unlinkedCodeBlock); |
| return JSValue::encode(target); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(globalFuncDateTimeFormat, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| IntlDateTimeFormat* dateTimeFormat = IntlDateTimeFormat::create(vm, globalObject->dateTimeFormatStructure()); |
| dateTimeFormat->initializeDateTimeFormat(globalObject, callFrame->argument(0), callFrame->argument(1)); |
| RETURN_IF_EXCEPTION(scope, encodedJSValue()); |
| double value = callFrame->argument(2).toNumber(globalObject); |
| RETURN_IF_EXCEPTION(scope, encodedJSValue()); |
| RELEASE_AND_RETURN(scope, JSValue::encode(dateTimeFormat->format(globalObject, value))); |
| } |
| |
| } // namespace JSC |
