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/*
* Copyright (C) 2016 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. ``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
* 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.
*/
#pragma once
#include "JSGlobalObject.h"
#include "ArrayPrototype.h"
#include "ObjectPrototype.h"
namespace JSC {
ALWAYS_INLINE bool JSGlobalObject::objectPrototypeIsSane()
{
return !hasIndexedProperties(m_objectPrototype->indexingType())
&& m_objectPrototype->getPrototypeDirect(vm()).isNull();
}
ALWAYS_INLINE bool JSGlobalObject::arrayPrototypeChainIsSane()
{
return !hasIndexedProperties(m_arrayPrototype->indexingType())
&& m_arrayPrototype->getPrototypeDirect(vm()) == m_objectPrototype.get()
&& objectPrototypeIsSane();
}
ALWAYS_INLINE bool JSGlobalObject::stringPrototypeChainIsSane()
{
return !hasIndexedProperties(m_stringPrototype->indexingType())
&& m_stringPrototype->getPrototypeDirect(vm()) == m_objectPrototype.get()
&& objectPrototypeIsSane();
}
ALWAYS_INLINE bool JSGlobalObject::isArrayPrototypeIteratorProtocolFastAndNonObservable()
{
// We're fast if we don't have any indexed properties on the prototype.
// We're non-observable if the iteration protocol hasn't changed.
//
// Note: it only makes sense to call this from the main thread. If you're
// trying to prove this behavior on the compiler thread, you'll want to
// carefully set up watchpoints to have correct ordering while JS code is
// executing concurrently.
return arrayIteratorProtocolWatchpointSet().isStillValid() && !isHavingABadTime() && arrayPrototypeChainIsSane();
}
// We're non-observable if the iteration protocol hasn't changed.
//
// Note: it only makes sense to call this from the main thread. If you're
// trying to prove this behavior on the compiler thread, you'll want to
// carefully set up watchpoints to have correct ordering while JS code is
// executing concurrently.
ALWAYS_INLINE bool JSGlobalObject::isMapPrototypeIteratorProtocolFastAndNonObservable()
{
return mapIteratorProtocolWatchpointSet().isStillValid();
}
ALWAYS_INLINE bool JSGlobalObject::isSetPrototypeIteratorProtocolFastAndNonObservable()
{
return setIteratorProtocolWatchpointSet().isStillValid();
}
ALWAYS_INLINE bool JSGlobalObject::isStringPrototypeIteratorProtocolFastAndNonObservable()
{
return stringIteratorProtocolWatchpointSet().isStillValid();
}
ALWAYS_INLINE bool JSGlobalObject::isMapPrototypeSetFastAndNonObservable()
{
return mapSetWatchpointSet().isStillValid();
}
ALWAYS_INLINE bool JSGlobalObject::isSetPrototypeAddFastAndNonObservable()
{
return setAddWatchpointSet().isStillValid();
}
} // namespace JSC