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/*
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* Copyright (C) 2008 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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#ifndef StructureStubInfo_h
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#define StructureStubInfo_h
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#if ENABLE(JIT)
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#include "Instruction.h"
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#include "MacroAssembler.h"
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#include "Opcode.h"
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#include "Structure.h"
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namespace JSC {
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enum AccessType {
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access_get_by_id_self,
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access_get_by_id_proto,
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access_get_by_id_chain,
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access_get_by_id_self_list,
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access_get_by_id_proto_list,
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access_put_by_id_transition,
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access_put_by_id_replace,
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access_get_by_id,
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access_put_by_id,
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access_get_by_id_generic,
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access_put_by_id_generic,
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access_get_array_length,
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access_get_string_length,
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};
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struct StructureStubInfo {
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StructureStubInfo(AccessType accessType)
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: accessType(accessType)
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, seen(false)
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{
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}
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void initGetByIdSelf(Structure* baseObjectStructure)
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{
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accessType = access_get_by_id_self;
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u.getByIdSelf.baseObjectStructure = baseObjectStructure;
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baseObjectStructure->ref();
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}
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void initGetByIdProto(Structure* baseObjectStructure, Structure* prototypeStructure)
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{
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accessType = access_get_by_id_proto;
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u.getByIdProto.baseObjectStructure = baseObjectStructure;
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baseObjectStructure->ref();
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u.getByIdProto.prototypeStructure = prototypeStructure;
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prototypeStructure->ref();
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}
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void initGetByIdChain(Structure* baseObjectStructure, StructureChain* chain)
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{
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accessType = access_get_by_id_chain;
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u.getByIdChain.baseObjectStructure = baseObjectStructure;
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baseObjectStructure->ref();
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u.getByIdChain.chain = chain;
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chain->ref();
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}
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void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
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{
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accessType = access_get_by_id_self_list;
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u.getByIdProtoList.structureList = structureList;
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u.getByIdProtoList.listSize = listSize;
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}
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void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
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{
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accessType = access_get_by_id_proto_list;
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u.getByIdProtoList.structureList = structureList;
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u.getByIdProtoList.listSize = listSize;
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}
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// PutById*
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void initPutByIdTransition(Structure* previousStructure, Structure* structure, StructureChain* chain)
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{
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accessType = access_put_by_id_transition;
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u.putByIdTransition.previousStructure = previousStructure;
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previousStructure->ref();
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u.putByIdTransition.structure = structure;
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structure->ref();
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u.putByIdTransition.chain = chain;
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chain->ref();
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}
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void initPutByIdReplace(Structure* baseObjectStructure)
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{
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accessType = access_put_by_id_replace;
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u.putByIdReplace.baseObjectStructure = baseObjectStructure;
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baseObjectStructure->ref();
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}
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void deref();
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bool seenOnce()
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{
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return seen;
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}
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void setSeen()
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{
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seen = true;
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}
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int accessType : 31;
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int seen : 1;
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union {
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struct {
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Structure* baseObjectStructure;
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} getByIdSelf;
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struct {
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Structure* baseObjectStructure;
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Structure* prototypeStructure;
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} getByIdProto;
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struct {
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Structure* baseObjectStructure;
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StructureChain* chain;
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} getByIdChain;
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struct {
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PolymorphicAccessStructureList* structureList;
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int listSize;
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} getByIdSelfList;
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struct {
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PolymorphicAccessStructureList* structureList;
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int listSize;
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} getByIdProtoList;
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struct {
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Structure* previousStructure;
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Structure* structure;
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StructureChain* chain;
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} putByIdTransition;
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struct {
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Structure* baseObjectStructure;
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} putByIdReplace;
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} u;
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CodeLocationLabel stubRoutine;
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CodeLocationCall callReturnLocation;
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CodeLocationLabel hotPathBegin;
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};
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} // namespace JSC
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#endif
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#endif // StructureStubInfo_h
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