/* * 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 arrayIteratorProtocolWatchpoint().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 mapIteratorProtocolWatchpoint().isStillValid(); } ALWAYS_INLINE bool JSGlobalObject::isSetPrototypeIteratorProtocolFastAndNonObservable() { return setIteratorProtocolWatchpoint().isStillValid(); } ALWAYS_INLINE bool JSGlobalObject::isStringPrototypeIteratorProtocolFastAndNonObservable() { return stringIteratorProtocolWatchpoint().isStillValid(); } ALWAYS_INLINE bool JSGlobalObject::isMapPrototypeSetFastAndNonObservable() { return mapSetWatchpoint().isStillValid(); } ALWAYS_INLINE bool JSGlobalObject::isSetPrototypeAddFastAndNonObservable() { return setAddWatchpoint().isStillValid(); } } // namespace JSC