From 1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c Mon Sep 17 00:00:00 2001 From: Lorry Tar Creator Date: Tue, 27 Jun 2017 06:07:23 +0000 Subject: webkitgtk-2.16.5 --- .../JavaScriptCore/runtime/JSGlobalObjectInlines.h | 69 ++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Source/JavaScriptCore/runtime/JSGlobalObjectInlines.h (limited to 'Source/JavaScriptCore/runtime/JSGlobalObjectInlines.h') diff --git a/Source/JavaScriptCore/runtime/JSGlobalObjectInlines.h b/Source/JavaScriptCore/runtime/JSGlobalObjectInlines.h new file mode 100644 index 000000000..7e334eb2f --- /dev/null +++ b/Source/JavaScriptCore/runtime/JSGlobalObjectInlines.h @@ -0,0 +1,69 @@ +/* + * 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().isNull(); +} + +ALWAYS_INLINE bool JSGlobalObject::arrayPrototypeChainIsSane() +{ + return !hasIndexedProperties(m_arrayPrototype->indexingType()) + && m_arrayPrototype->getPrototypeDirect() == m_objectPrototype.get() + && objectPrototypeIsSane(); +} + +ALWAYS_INLINE bool JSGlobalObject::stringPrototypeChainIsSane() +{ + return !hasIndexedProperties(m_stringPrototype->indexingType()) + && m_stringPrototype->getPrototypeDirect() == m_objectPrototype.get() + && objectPrototypeIsSane(); +} + + +ALWAYS_INLINE bool JSGlobalObject::isArrayIteratorProtocolFastAndNonObservable() +{ + // 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(); +} + +} // namespace JSC -- cgit v1.2.1