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Diffstat (limited to 'Source/JavaScriptCore/bytecode/StructureStubInfo.h')
| -rw-r--r-- | Source/JavaScriptCore/bytecode/StructureStubInfo.h | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/bytecode/StructureStubInfo.h b/Source/JavaScriptCore/bytecode/StructureStubInfo.h new file mode 100644 index 0000000..8e2c489 --- /dev/null +++ b/Source/JavaScriptCore/bytecode/StructureStubInfo.h @@ -0,0 +1,185 @@ +/* + * Copyright (C) 2008 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. + */ + +#ifndef StructureStubInfo_h +#define StructureStubInfo_h + +#if ENABLE(JIT) + +#include "Instruction.h" +#include "MacroAssembler.h" +#include "Opcode.h" +#include "Structure.h" + +namespace JSC { + + enum AccessType { + access_get_by_id_self, + access_get_by_id_proto, + access_get_by_id_chain, + access_get_by_id_self_list, + access_get_by_id_proto_list, + access_put_by_id_transition, + access_put_by_id_replace, + access_get_by_id, + access_put_by_id, + access_get_by_id_generic, + access_put_by_id_generic, + access_get_array_length, + access_get_string_length, + }; + + struct StructureStubInfo { + StructureStubInfo(AccessType accessType) + : accessType(accessType) + , seen(false) + { + } + + void initGetByIdSelf(Structure* baseObjectStructure) + { + accessType = access_get_by_id_self; + + u.getByIdSelf.baseObjectStructure = baseObjectStructure; + baseObjectStructure->ref(); + } + + void initGetByIdProto(Structure* baseObjectStructure, Structure* prototypeStructure) + { + accessType = access_get_by_id_proto; + + u.getByIdProto.baseObjectStructure = baseObjectStructure; + baseObjectStructure->ref(); + + u.getByIdProto.prototypeStructure = prototypeStructure; + prototypeStructure->ref(); + } + + void initGetByIdChain(Structure* baseObjectStructure, StructureChain* chain) + { + accessType = access_get_by_id_chain; + + u.getByIdChain.baseObjectStructure = baseObjectStructure; + baseObjectStructure->ref(); + + u.getByIdChain.chain = chain; + chain->ref(); + } + + void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize) + { + accessType = access_get_by_id_self_list; + + u.getByIdProtoList.structureList = structureList; + u.getByIdProtoList.listSize = listSize; + } + + void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize) + { + accessType = access_get_by_id_proto_list; + + u.getByIdProtoList.structureList = structureList; + u.getByIdProtoList.listSize = listSize; + } + + // PutById* + + void initPutByIdTransition(Structure* previousStructure, Structure* structure, StructureChain* chain) + { + accessType = access_put_by_id_transition; + + u.putByIdTransition.previousStructure = previousStructure; + previousStructure->ref(); + + u.putByIdTransition.structure = structure; + structure->ref(); + + u.putByIdTransition.chain = chain; + chain->ref(); + } + + void initPutByIdReplace(Structure* baseObjectStructure) + { + accessType = access_put_by_id_replace; + + u.putByIdReplace.baseObjectStructure = baseObjectStructure; + baseObjectStructure->ref(); + } + + void deref(); + + bool seenOnce() + { + return seen; + } + + void setSeen() + { + seen = true; + } + + int accessType : 31; + int seen : 1; + + union { + struct { + Structure* baseObjectStructure; + } getByIdSelf; + struct { + Structure* baseObjectStructure; + Structure* prototypeStructure; + } getByIdProto; + struct { + Structure* baseObjectStructure; + StructureChain* chain; + } getByIdChain; + struct { + PolymorphicAccessStructureList* structureList; + int listSize; + } getByIdSelfList; + struct { + PolymorphicAccessStructureList* structureList; + int listSize; + } getByIdProtoList; + struct { + Structure* previousStructure; + Structure* structure; + StructureChain* chain; + } putByIdTransition; + struct { + Structure* baseObjectStructure; + } putByIdReplace; + } u; + + CodeLocationLabel stubRoutine; + CodeLocationCall callReturnLocation; + CodeLocationLabel hotPathBegin; + }; + +} // namespace JSC + +#endif + +#endif // StructureStubInfo_h |