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/*
* Copyright (C) 2012 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 "PolymorphicPutByIdList.h"
#if ENABLE(JIT)
#include "StructureStubInfo.h"
namespace JSC {
PutByIdAccess PutByIdAccess::fromStructureStubInfo(
StructureStubInfo& stubInfo,
MacroAssemblerCodePtr initialSlowPath)
{
PutByIdAccess result;
switch (stubInfo.accessType) {
case access_put_by_id_replace:
result.m_type = Replace;
result.m_oldStructure.copyFrom(stubInfo.u.putByIdReplace.baseObjectStructure);
result.m_stubRoutine = JITStubRoutine::createSelfManagedRoutine(initialSlowPath);
break;
case access_put_by_id_transition_direct:
case access_put_by_id_transition_normal:
result.m_type = Transition;
result.m_oldStructure.copyFrom(stubInfo.u.putByIdTransition.previousStructure);
result.m_newStructure.copyFrom(stubInfo.u.putByIdTransition.structure);
result.m_chain.copyFrom(stubInfo.u.putByIdTransition.chain);
result.m_stubRoutine = stubInfo.stubRoutine;
break;
default:
ASSERT_NOT_REACHED();
}
return result;
}
bool PutByIdAccess::visitWeak() const
{
switch (m_type) {
case Replace:
if (!Heap::isMarked(m_oldStructure.get()))
return false;
break;
case Transition:
if (!Heap::isMarked(m_oldStructure.get()))
return false;
if (!Heap::isMarked(m_newStructure.get()))
return false;
if (!Heap::isMarked(m_chain.get()))
return false;
break;
default:
ASSERT_NOT_REACHED();
return false;
}
return true;
}
PolymorphicPutByIdList::PolymorphicPutByIdList(
PutKind putKind,
StructureStubInfo& stubInfo,
MacroAssemblerCodePtr initialSlowPath)
: m_kind(putKind)
{
m_list.append(PutByIdAccess::fromStructureStubInfo(stubInfo, initialSlowPath));
}
PolymorphicPutByIdList* PolymorphicPutByIdList::from(
PutKind putKind,
StructureStubInfo& stubInfo,
MacroAssemblerCodePtr initialSlowPath)
{
if (stubInfo.accessType == access_put_by_id_list)
return stubInfo.u.putByIdList.list;
ASSERT(stubInfo.accessType == access_put_by_id_replace
|| stubInfo.accessType == access_put_by_id_transition_normal
|| stubInfo.accessType == access_put_by_id_transition_direct);
PolymorphicPutByIdList* result =
new PolymorphicPutByIdList(putKind, stubInfo, initialSlowPath);
stubInfo.initPutByIdList(result);
return result;
}
PolymorphicPutByIdList::~PolymorphicPutByIdList() { }
bool PolymorphicPutByIdList::isFull() const
{
ASSERT(size() <= POLYMORPHIC_LIST_CACHE_SIZE);
return size() == POLYMORPHIC_LIST_CACHE_SIZE;
}
bool PolymorphicPutByIdList::isAlmostFull() const
{
ASSERT(size() <= POLYMORPHIC_LIST_CACHE_SIZE);
return size() >= POLYMORPHIC_LIST_CACHE_SIZE - 1;
}
void PolymorphicPutByIdList::addAccess(const PutByIdAccess& putByIdAccess)
{
ASSERT(!isFull());
// Make sure that the resizing optimizes for space, not time.
m_list.resize(m_list.size() + 1);
m_list.last() = putByIdAccess;
}
bool PolymorphicPutByIdList::visitWeak() const
{
for (unsigned i = 0; i < size(); ++i) {
if (!at(i).visitWeak())
return false;
}
return true;
}
} // namespace JSC
#endif // ENABLE(JIT)