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/*
* Copyright (C) 2014 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.
*/
#include "config.h"
#include "ComplexGetStatus.h"
#include "JSCInlines.h"
namespace JSC {
ComplexGetStatus ComplexGetStatus::computeFor(
CodeBlock* profiledBlock, Structure* headStructure, StructureChain* chain,
unsigned chainCount, StringImpl* uid)
{
// FIXME: We should assert that we never see a structure that
// hasImpureGetOwnPropertySlot() but for which we don't
// newImpurePropertyFiresWatchpoints(). We're not at a point where we can do
// that, yet.
// https://bugs.webkit.org/show_bug.cgi?id=131810
if (headStructure->takesSlowPathInDFGForImpureProperty())
return takesSlowPath();
ComplexGetStatus result;
result.m_kind = Inlineable;
if (chain) {
result.m_chain = adoptRef(new IntendedStructureChain(
profiledBlock, headStructure, chain, chainCount));
if (!result.m_chain->isStillValid())
return skip();
if (headStructure->takesSlowPathInDFGForImpureProperty()
|| result.m_chain->takesSlowPathInDFGForImpureProperty())
return takesSlowPath();
JSObject* currentObject = result.m_chain->terminalPrototype();
Structure* currentStructure = result.m_chain->last();
ASSERT_UNUSED(currentObject, currentObject);
result.m_offset = currentStructure->getConcurrently(
*profiledBlock->vm(), uid, result.m_attributes);
} else {
result.m_offset = headStructure->getConcurrently(
*profiledBlock->vm(), uid, result.m_attributes);
}
if (!isValidOffset(result.m_offset))
return takesSlowPath();
return result;
}
} // namespace JSC
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