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/*
* Copyright (C) 2011-2012, 2016-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "JSProxy.h"
#include "JSGlobalObject.h"
#include "JSCInlines.h"
#include "PrototypeMapInlines.h"
namespace JSC {
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(JSProxy);
const ClassInfo JSProxy::s_info = { "JSProxy", &Base::s_info, 0, CREATE_METHOD_TABLE(JSProxy) };
void JSProxy::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
JSProxy* thisObject = jsCast<JSProxy*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.append(thisObject->m_target);
}
void JSProxy::setTarget(VM& vm, JSGlobalObject* globalObject)
{
ASSERT_ARG(globalObject, globalObject);
JSGlobalObject* previousGlobalObject = jsCast<JSGlobalObject*>(m_target.get());
m_target.set(vm, this, globalObject);
setPrototypeDirect(vm, globalObject->getPrototypeDirect());
PrototypeMap& prototypeMap = vm.prototypeMap;
if (!prototypeMap.isPrototype(this))
return;
// previousGlobalObject cannot be null because in order for this JSProxy to be used as a prototype
// of an object, we must have previously called setTarget() and associated it with a JSGlobalObject.
RELEASE_ASSERT(previousGlobalObject);
// This is slow but constant time. We think it's very rare for a proxy
// to be a prototype, and reasonably rare to retarget a proxy,
// so slow constant time is OK.
for (size_t i = 0; i <= JSFinalObject::maxInlineCapacity(); ++i)
prototypeMap.clearEmptyObjectStructureForPrototype(previousGlobalObject, this, i);
}
String JSProxy::className(const JSObject* object)
{
const JSProxy* thisObject = jsCast<const JSProxy*>(object);
return thisObject->target()->methodTable()->className(thisObject->target());
}
String JSProxy::toStringName(const JSObject* object, ExecState* exec)
{
const JSProxy* thisObject = jsCast<const JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->toStringName(thisObject->target(), exec);
}
bool JSProxy::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->getOwnPropertySlot(thisObject->target(), exec, propertyName, slot);
}
bool JSProxy::getOwnPropertySlotByIndex(JSObject* object, ExecState* exec, unsigned propertyName, PropertySlot& slot)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->getOwnPropertySlotByIndex(thisObject->target(), exec, propertyName, slot);
}
bool JSProxy::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
JSProxy* thisObject = jsCast<JSProxy*>(cell);
return thisObject->target()->methodTable(exec->vm())->put(thisObject->target(), exec, propertyName, value, slot);
}
bool JSProxy::putByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, JSValue value, bool shouldThrow)
{
JSProxy* thisObject = jsCast<JSProxy*>(cell);
return thisObject->target()->methodTable(exec->vm())->putByIndex(thisObject->target(), exec, propertyName, value, shouldThrow);
}
bool JSProxy::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName propertyName, const PropertyDescriptor& descriptor, bool shouldThrow)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->defineOwnProperty(thisObject->target(), exec, propertyName, descriptor, shouldThrow);
}
bool JSProxy::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
{
JSProxy* thisObject = jsCast<JSProxy*>(cell);
return thisObject->target()->methodTable(exec->vm())->deleteProperty(thisObject->target(), exec, propertyName);
}
bool JSProxy::preventExtensions(JSObject* object, ExecState* exec)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->preventExtensions(thisObject->target(), exec);
}
bool JSProxy::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned propertyName)
{
JSProxy* thisObject = jsCast<JSProxy*>(cell);
return thisObject->target()->methodTable(exec->vm())->deletePropertyByIndex(thisObject->target(), exec, propertyName);
}
void JSProxy::getPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
thisObject->target()->methodTable(exec->vm())->getPropertyNames(thisObject->target(), exec, propertyNames, mode);
}
uint32_t JSProxy::getEnumerableLength(ExecState* exec, JSObject* object)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->getEnumerableLength(exec, thisObject->target());
}
void JSProxy::getStructurePropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode)
{
// Skip the structure loop, since it is invalid for proxies.
}
void JSProxy::getGenericPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
// Get *all* of the property names, not just the generic ones, since we skipped the structure
// ones above.
thisObject->target()->methodTable(exec->vm())->getPropertyNames(thisObject->target(), exec, propertyNames, mode);
}
void JSProxy::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
thisObject->target()->methodTable(exec->vm())->getOwnPropertyNames(thisObject->target(), exec, propertyNames, mode);
}
bool JSProxy::setPrototype(JSObject*, ExecState* exec, JSValue, bool shouldThrowIfCantSet)
{
auto scope = DECLARE_THROW_SCOPE(exec->vm());
return typeError(exec, scope, shouldThrowIfCantSet, ASCIILiteral("Cannot set prototype of this object"));
}
JSValue JSProxy::getPrototype(JSObject* object, ExecState* exec)
{
JSProxy* thisObject = jsCast<JSProxy*>(object);
return thisObject->target()->methodTable(exec->vm())->getPrototype(thisObject->target(), exec);
}
} // namespace JSC
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