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/*
* Copyright (C) 2013-2021 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. AND ITS CONTRIBUTORS ``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 ITS 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 "DFGDesiredTransitions.h"
#if ENABLE(DFG_JIT)
#include "CodeBlock.h"
#include "DFGCommonData.h"
#include "JSCellInlines.h"
#include "SlotVisitorInlines.h"
namespace JSC { namespace DFG {
DesiredTransition::DesiredTransition(CodeBlock* codeOriginOwner, Structure* oldStructure, Structure* newStructure)
: m_codeOriginOwner(codeOriginOwner)
, m_oldStructure(oldStructure)
, m_newStructure(newStructure)
{
}
template<typename Visitor>
void DesiredTransition::visitChildren(Visitor& visitor)
{
visitor.appendUnbarriered(m_codeOriginOwner);
visitor.appendUnbarriered(m_oldStructure);
visitor.appendUnbarriered(m_newStructure);
}
template void DesiredTransition::visitChildren(AbstractSlotVisitor&);
template void DesiredTransition::visitChildren(SlotVisitor&);
DesiredTransitions::DesiredTransitions(CodeBlock* codeBlock)
: m_codeBlock(codeBlock)
{
}
DesiredTransitions::~DesiredTransitions() = default;
void DesiredTransitions::addLazily(CodeBlock* codeOriginOwner, Structure* oldStructure, Structure* newStructure)
{
m_transitions.append(DesiredTransition(codeOriginOwner, oldStructure, newStructure));
}
void DesiredTransitions::reallyAdd(VM& vm, CommonData* common)
{
FixedVector<WeakReferenceTransition> transitions(m_transitions.size());
for (unsigned i = 0; i < m_transitions.size(); i++) {
auto& desiredTransition = m_transitions[i];
transitions[i] = WeakReferenceTransition(vm, m_codeBlock, desiredTransition.m_codeOriginOwner, desiredTransition.m_oldStructure, desiredTransition.m_newStructure);
}
if (!transitions.isEmpty()) {
ConcurrentJSLocker locker(m_codeBlock->m_lock);
ASSERT(common->m_transitions.isEmpty());
common->m_transitions = WTFMove(transitions);
}
}
template<typename Visitor>
void DesiredTransitions::visitChildren(Visitor& visitor)
{
for (unsigned i = 0; i < m_transitions.size(); i++)
m_transitions[i].visitChildren(visitor);
}
template void DesiredTransitions::visitChildren(AbstractSlotVisitor&);
template void DesiredTransitions::visitChildren(SlotVisitor&);
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)
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