/*
* 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 "CatchScope.h"
#include "IndirectEvalExecutable.h"
#include "Interpreter.h"
#include "IntlDateTimeFormat.h"
#include "JSCInlines.h"
#include "JSInternalPromise.h"
#include "JSModuleLoader.h"
#include "JSPromise.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>
#ifdef DARLING
#include <JSSet.h>
#endif
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), nullptr, TypeNothing, 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();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue value = callFrame->uncheckedArgument(0);
if (value.isObject() || value.isNull()) {
JSObject* object = asObject(callFrame->thisValue());
object->setPrototypeDirect(vm, value);
}
scope.assertNoException();
return { };
}
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 catchScope = DECLARE_CATCH_SCOPE(vm);
auto reject = [&](Exception* exception) {
if (UNLIKELY(isTerminatedExecutionException(vm, exception)))
return promise;
JSValue error = exception->value();
catchScope.clearException();
promise->reject(globalObject, error);
return promise;
};
auto sourceOrigin = callFrame->callerSourceOrigin(vm);
RELEASE_ASSERT(callFrame->argumentCount() == 1);
auto* specifier = callFrame->uncheckedArgument(0).toString(globalObject);
if (Exception* exception = catchScope.exception())
return JSValue::encode(reject(exception));
// 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);
if (Exception* exception = catchScope.exception())
return JSValue::encode(reject(exception));
promise->resolve(globalObject, internalPromise);
return JSValue::encode(promise);
}
JSC_DEFINE_HOST_FUNCTION(globalFuncPropertyIsEnumerable, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
RELEASE_ASSERT(callFrame->argumentCount() == 2);
JSObject* object = jsCast<JSObject*>(callFrame->uncheckedArgument(0));
auto propertyName = callFrame->uncheckedArgument(1).toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
scope.release();
PropertyDescriptor descriptor;
bool enumerable = object->getOwnPropertyDescriptor(globalObject, propertyName, descriptor) && descriptor.enumerable();
return JSValue::encode(jsBoolean(enumerable));
}
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;
};
// 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->uncheckedArgument(0));
ASSERT(target->isStructureExtensible(vm));
JSValue sourceValue = callFrame->uncheckedArgument(1);
if (sourceValue.isUndefinedOrNull())
return JSValue::encode(jsUndefined());
JSObject* source = sourceValue.toObject(globalObject);
scope.assertNoException();
JSSet* excludedSet = nullptr;
if (callFrame->argumentCount() > 2)
excludedSet = jsCast<JSSet*>(callFrame->uncheckedArgument(2));
auto isPropertyNameExcluded = [&] (JSGlobalObject* globalObject, PropertyName propertyName) -> bool {
ASSERT(!propertyName.isPrivateName());
if (!excludedSet)
return false;
JSValue propertyNameValue = identifierToJSValue(vm, Identifier::fromUid(vm, propertyName.uid()));
RETURN_IF_EXCEPTION(scope, false);
return excludedSet->has(globalObject, propertyNameValue);
};
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;
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
bool excluded = isPropertyNameExcluded(globalObject, properties[i].get());
RETURN_IF_EXCEPTION(scope, { });
if (excluded)
continue;
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) {
bool excluded = isPropertyNameExcluded(globalObject, propertyName);
RETURN_IF_EXCEPTION(scope, false);
if (excluded)
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 JSValue::encode(jsUndefined());
}
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