mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
/*
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* Copyright (C) 2016 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "JSGlobalObject.h"
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#include "ArrayPrototype.h"
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#include "ObjectPrototype.h"
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namespace JSC {
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ALWAYS_INLINE bool JSGlobalObject::objectPrototypeIsSane()
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{
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return !hasIndexedProperties(m_objectPrototype->indexingType())
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&& m_objectPrototype->getPrototypeDirect().isNull();
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}
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ALWAYS_INLINE bool JSGlobalObject::arrayPrototypeChainIsSane()
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{
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return !hasIndexedProperties(m_arrayPrototype->indexingType())
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&& m_arrayPrototype->getPrototypeDirect() == m_objectPrototype.get()
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&& objectPrototypeIsSane();
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}
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ALWAYS_INLINE bool JSGlobalObject::stringPrototypeChainIsSane()
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{
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return !hasIndexedProperties(m_stringPrototype->indexingType())
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&& m_stringPrototype->getPrototypeDirect() == m_objectPrototype.get()
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&& objectPrototypeIsSane();
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}
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ALWAYS_INLINE bool JSGlobalObject::isArrayPrototypeIteratorProtocolFastAndNonObservable()
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{
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// We're fast if we don't have any indexed properties on the prototype.
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// We're non-observable if the iteration protocol hasn't changed.
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//
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// Note: it only makes sense to call this from the main thread. If you're
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// trying to prove this behavior on the compiler thread, you'll want to
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// carefully set up watchpoints to have correct ordering while JS code is
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// executing concurrently.
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return arrayIteratorProtocolWatchpoint().isStillValid() && !isHavingABadTime() && arrayPrototypeChainIsSane();
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}
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// We're non-observable if the iteration protocol hasn't changed.
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//
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// Note: it only makes sense to call this from the main thread. If you're
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// trying to prove this behavior on the compiler thread, you'll want to
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// carefully set up watchpoints to have correct ordering while JS code is
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// executing concurrently.
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ALWAYS_INLINE bool JSGlobalObject::isMapPrototypeIteratorProtocolFastAndNonObservable()
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{
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return mapIteratorProtocolWatchpoint().isStillValid();
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}
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ALWAYS_INLINE bool JSGlobalObject::isSetPrototypeIteratorProtocolFastAndNonObservable()
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{
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return setIteratorProtocolWatchpoint().isStillValid();
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}
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ALWAYS_INLINE bool JSGlobalObject::isStringPrototypeIteratorProtocolFastAndNonObservable()
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{
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return stringIteratorProtocolWatchpoint().isStillValid();
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}
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ALWAYS_INLINE bool JSGlobalObject::isMapPrototypeSetFastAndNonObservable()
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{
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return mapSetWatchpoint().isStillValid();
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}
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ALWAYS_INLINE bool JSGlobalObject::isSetPrototypeAddFastAndNonObservable()
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{
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return setAddWatchpoint().isStillValid();
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}
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} // namespace JSC
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