2017-08-12 16:48:01 +00:00
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/*
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* Copyright (C) 2014, 2015 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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#include "config.h"
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#include "ComplexGetStatus.h"
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2022-10-23 02:55:20 +00:00
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#include "StructureInlines.h"
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2017-08-12 16:48:01 +00:00
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namespace JSC {
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ComplexGetStatus ComplexGetStatus::computeFor(
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Structure* headStructure, const ObjectPropertyConditionSet& conditionSet, UniquedStringImpl* uid)
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{
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// FIXME: We should assert that we never see a structure that
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// getOwnPropertySlotIsImpure() but for which we don't
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// newImpurePropertyFiresWatchpoints(). We're not at a point where we can do
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// that, yet.
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// https://bugs.webkit.org/show_bug.cgi?id=131810
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ASSERT(conditionSet.isValid());
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if (headStructure->takesSlowPathInDFGForImpureProperty())
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return takesSlowPath();
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ComplexGetStatus result;
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result.m_kind = Inlineable;
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if (!conditionSet.isEmpty()) {
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result.m_conditionSet = conditionSet;
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if (!result.m_conditionSet.structuresEnsureValidity())
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return skip();
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unsigned numberOfSlotBases =
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result.m_conditionSet.numberOfConditionsWithKind(PropertyCondition::Presence);
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RELEASE_ASSERT(numberOfSlotBases <= 1);
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if (!numberOfSlotBases) {
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ASSERT(result.m_offset == invalidOffset);
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return result;
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}
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ObjectPropertyCondition base = result.m_conditionSet.slotBaseCondition();
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ASSERT(base.kind() == PropertyCondition::Presence);
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result.m_offset = base.offset();
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} else
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result.m_offset = headStructure->getConcurrently(uid);
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if (!isValidOffset(result.m_offset))
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return takesSlowPath();
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return result;
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}
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} // namespace JSC
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