blob: 0731827af2a1da9aebd57d2cc1e8b4049db15f0e [file] [log] [blame]
/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003-2018 Apple Inc. All rights reserved.
*
* 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 "JSCell.h"
#include "ArrayBufferView.h"
#include "JSCInlines.h"
#include "JSCast.h"
#include "JSFunction.h"
#include "JSString.h"
#include "JSObject.h"
#include "NumberObject.h"
#include "WebAssemblyToJSCallee.h"
#include <wtf/LockAlgorithmInlines.h>
#include <wtf/MathExtras.h>
namespace JSC {
COMPILE_ASSERT(sizeof(JSCell) == sizeof(uint64_t), jscell_is_eight_bytes);
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(JSCell);
void JSCell::destroy(JSCell* cell)
{
cell->JSCell::~JSCell();
}
void JSCell::dump(PrintStream& out) const
{
methodTable(*vm())->dumpToStream(this, out);
}
void JSCell::dumpToStream(const JSCell* cell, PrintStream& out)
{
out.printf("<%p, %s>", cell, cell->className(*cell->vm()));
}
size_t JSCell::estimatedSizeInBytes(VM& vm) const
{
return methodTable(vm)->estimatedSize(const_cast<JSCell*>(this), vm);
}
size_t JSCell::estimatedSize(JSCell* cell, VM&)
{
return cell->cellSize();
}
void JSCell::heapSnapshot(JSCell*, HeapSnapshotBuilder&)
{
}
bool JSCell::getString(ExecState* exec, String& stringValue) const
{
if (!isString())
return false;
stringValue = static_cast<const JSString*>(this)->value(exec);
return true;
}
String JSCell::getString(ExecState* exec) const
{
return isString() ? static_cast<const JSString*>(this)->value(exec) : String();
}
JSObject* JSCell::getObject()
{
return isObject() ? asObject(this) : 0;
}
const JSObject* JSCell::getObject() const
{
return isObject() ? static_cast<const JSObject*>(this) : 0;
}
CallType JSCell::getCallData(JSCell*, CallData& callData)
{
callData.js.functionExecutable = nullptr;
callData.js.scope = nullptr;
callData.native.function = nullptr;
return CallType::None;
}
ConstructType JSCell::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.js.functionExecutable = nullptr;
constructData.js.scope = nullptr;
constructData.native.function = nullptr;
return ConstructType::None;
}
bool JSCell::put(JSCell* cell, ExecState* exec, PropertyName identifier, JSValue value, PutPropertySlot& slot)
{
if (cell->isString() || cell->isSymbol() || cell->isBigInt())
return JSValue(cell).putToPrimitive(exec, identifier, value, slot);
JSObject* thisObject = cell->toObject(exec, exec->lexicalGlobalObject());
return thisObject->methodTable(exec->vm())->put(thisObject, exec, identifier, value, slot);
}
bool JSCell::putByIndex(JSCell* cell, ExecState* exec, unsigned identifier, JSValue value, bool shouldThrow)
{
if (cell->isString() || cell->isSymbol() || cell->isBigInt()) {
PutPropertySlot slot(cell, shouldThrow);
return JSValue(cell).putToPrimitive(exec, Identifier::from(exec, identifier), value, slot);
}
JSObject* thisObject = cell->toObject(exec, exec->lexicalGlobalObject());
return thisObject->methodTable(exec->vm())->putByIndex(thisObject, exec, identifier, value, shouldThrow);
}
bool JSCell::deleteProperty(JSCell* cell, ExecState* exec, PropertyName identifier)
{
JSObject* thisObject = cell->toObject(exec, exec->lexicalGlobalObject());
return thisObject->methodTable(exec->vm())->deleteProperty(thisObject, exec, identifier);
}
bool JSCell::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned identifier)
{
JSObject* thisObject = cell->toObject(exec, exec->lexicalGlobalObject());
return thisObject->methodTable(exec->vm())->deletePropertyByIndex(thisObject, exec, identifier);
}
JSValue JSCell::toThis(JSCell* cell, ExecState* exec, ECMAMode ecmaMode)
{
if (ecmaMode == StrictMode)
return cell;
return cell->toObject(exec, exec->lexicalGlobalObject());
}
JSValue JSCell::toPrimitive(ExecState* exec, PreferredPrimitiveType preferredType) const
{
if (isString())
return static_cast<const JSString*>(this)->toPrimitive(exec, preferredType);
if (isSymbol())
return static_cast<const Symbol*>(this)->toPrimitive(exec, preferredType);
if (isBigInt())
return static_cast<const JSBigInt*>(this)->toPrimitive(exec, preferredType);
return static_cast<const JSObject*>(this)->toPrimitive(exec, preferredType);
}
bool JSCell::getPrimitiveNumber(ExecState* exec, double& number, JSValue& value) const
{
if (isString())
return static_cast<const JSString*>(this)->getPrimitiveNumber(exec, number, value);
if (isSymbol())
return static_cast<const Symbol*>(this)->getPrimitiveNumber(exec, number, value);
if (isBigInt())
return static_cast<const JSBigInt*>(this)->getPrimitiveNumber(exec, number, value);
return static_cast<const JSObject*>(this)->getPrimitiveNumber(exec, number, value);
}
double JSCell::toNumber(ExecState* exec) const
{
if (isString())
return static_cast<const JSString*>(this)->toNumber(exec);
if (isSymbol())
return static_cast<const Symbol*>(this)->toNumber(exec);
if (isBigInt())
return static_cast<const JSBigInt*>(this)->toNumber(exec);
return static_cast<const JSObject*>(this)->toNumber(exec);
}
JSObject* JSCell::toObjectSlow(ExecState* exec, JSGlobalObject* globalObject) const
{
ASSERT(!isObject());
if (isString())
return static_cast<const JSString*>(this)->toObject(exec, globalObject);
if (isBigInt())
return static_cast<const JSBigInt*>(this)->toObject(exec, globalObject);
ASSERT(isSymbol());
return static_cast<const Symbol*>(this)->toObject(exec, globalObject);
}
void slowValidateCell(JSCell* cell)
{
ASSERT_GC_OBJECT_LOOKS_VALID(cell);
}
JSValue JSCell::defaultValue(const JSObject*, ExecState*, PreferredPrimitiveType)
{
RELEASE_ASSERT_NOT_REACHED();
return jsUndefined();
}
bool JSCell::getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&)
{
RELEASE_ASSERT_NOT_REACHED();
return false;
}
bool JSCell::getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned, PropertySlot&)
{
RELEASE_ASSERT_NOT_REACHED();
return false;
}
void JSCell::getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode)
{
RELEASE_ASSERT_NOT_REACHED();
}
void JSCell::getOwnNonIndexPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode)
{
RELEASE_ASSERT_NOT_REACHED();
}
String JSCell::className(const JSObject*, VM&)
{
RELEASE_ASSERT_NOT_REACHED();
return String();
}
String JSCell::toStringName(const JSObject*, ExecState*)
{
RELEASE_ASSERT_NOT_REACHED();
return String();
}
const char* JSCell::className(VM& vm) const
{
return classInfo(vm)->className;
}
void JSCell::getPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode)
{
RELEASE_ASSERT_NOT_REACHED();
}
bool JSCell::customHasInstance(JSObject*, ExecState*, JSValue)
{
RELEASE_ASSERT_NOT_REACHED();
return false;
}
bool JSCell::defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool)
{
RELEASE_ASSERT_NOT_REACHED();
return false;
}
uint32_t JSCell::getEnumerableLength(ExecState*, JSObject*)
{
RELEASE_ASSERT_NOT_REACHED();
return 0;
}
void JSCell::getStructurePropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode)
{
RELEASE_ASSERT_NOT_REACHED();
}
void JSCell::getGenericPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode)
{
RELEASE_ASSERT_NOT_REACHED();
}
bool JSCell::preventExtensions(JSObject*, ExecState*)
{
RELEASE_ASSERT_NOT_REACHED();
}
bool JSCell::isExtensible(JSObject*, ExecState*)
{
RELEASE_ASSERT_NOT_REACHED();
}
bool JSCell::setPrototype(JSObject*, ExecState*, JSValue, bool)
{
RELEASE_ASSERT_NOT_REACHED();
}
JSValue JSCell::getPrototype(JSObject*, ExecState*)
{
RELEASE_ASSERT_NOT_REACHED();
}
void JSCellLock::lockSlow()
{
Atomic<IndexingType>* lock = bitwise_cast<Atomic<IndexingType>*>(&m_indexingTypeAndMisc);
IndexingTypeLockAlgorithm::lockSlow(*lock);
}
void JSCellLock::unlockSlow()
{
Atomic<IndexingType>* lock = bitwise_cast<Atomic<IndexingType>*>(&m_indexingTypeAndMisc);
IndexingTypeLockAlgorithm::unlockSlow(*lock);
}
} // namespace JSC