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Diffstat (limited to 'Source/JavaScriptCore/bytecode/StructureStubInfo.h')
| -rw-r--r-- | Source/JavaScriptCore/bytecode/StructureStubInfo.h | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/bytecode/StructureStubInfo.h b/Source/JavaScriptCore/bytecode/StructureStubInfo.h new file mode 100644 index 000000000..830b75594 --- /dev/null +++ b/Source/JavaScriptCore/bytecode/StructureStubInfo.h @@ -0,0 +1,238 @@ +/* + * 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_normal, + access_put_by_id_transition_direct, + access_put_by_id_replace, + access_unset, + access_get_by_id_generic, + access_put_by_id_generic, + access_get_array_length, + access_get_string_length, + }; + + inline bool isGetByIdAccess(AccessType accessType) + { + switch (accessType) { + case access_get_by_id_self: + case access_get_by_id_proto: + case access_get_by_id_chain: + case access_get_by_id_self_list: + case access_get_by_id_proto_list: + case access_get_by_id_generic: + case access_get_array_length: + case access_get_string_length: + return true; + default: + return false; + } + } + + inline bool isPutByIdAccess(AccessType accessType) + { + switch (accessType) { + case access_put_by_id_transition_normal: + case access_put_by_id_transition_direct: + case access_put_by_id_replace: + case access_put_by_id_generic: + return true; + default: + return false; + } + } + + struct StructureStubInfo { + StructureStubInfo() + : accessType(access_unset) + , seen(false) + { + } + + void initGetByIdSelf(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure) + { + accessType = access_get_by_id_self; + + u.getByIdSelf.baseObjectStructure.set(globalData, owner, baseObjectStructure); + } + + void initGetByIdProto(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, Structure* prototypeStructure) + { + accessType = access_get_by_id_proto; + + u.getByIdProto.baseObjectStructure.set(globalData, owner, baseObjectStructure); + u.getByIdProto.prototypeStructure.set(globalData, owner, prototypeStructure); + } + + void initGetByIdChain(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, StructureChain* chain) + { + accessType = access_get_by_id_chain; + + u.getByIdChain.baseObjectStructure.set(globalData, owner, baseObjectStructure); + u.getByIdChain.chain.set(globalData, owner, chain); + } + + 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(JSGlobalData& globalData, JSCell* owner, Structure* previousStructure, Structure* structure, StructureChain* chain, bool isDirect) + { + if (isDirect) + accessType = access_put_by_id_transition_direct; + else + accessType = access_put_by_id_transition_normal; + + u.putByIdTransition.previousStructure.set(globalData, owner, previousStructure); + u.putByIdTransition.structure.set(globalData, owner, structure); + u.putByIdTransition.chain.set(globalData, owner, chain); + } + + void initPutByIdReplace(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure) + { + accessType = access_put_by_id_replace; + + u.putByIdReplace.baseObjectStructure.set(globalData, owner, baseObjectStructure); + } + + void reset() + { + accessType = access_unset; + + stubRoutine = MacroAssemblerCodeRef(); + } + + void deref(); + + bool visitWeakReferences(); + + bool seenOnce() + { + return seen; + } + + void setSeen() + { + seen = true; + } + + unsigned bytecodeIndex; + + int8_t accessType; + int8_t seen; + +#if ENABLE(DFG_JIT) + int8_t baseGPR; +#if USE(JSVALUE32_64) + int8_t valueTagGPR; +#endif + int8_t valueGPR; + int8_t scratchGPR; + int16_t deltaCallToDone; + int16_t deltaCallToStructCheck; + int16_t deltaCallToSlowCase; + int16_t deltaCheckImmToCall; +#if USE(JSVALUE64) + int16_t deltaCallToLoadOrStore; +#else + int16_t deltaCallToTagLoadOrStore; + int16_t deltaCallToPayloadLoadOrStore; +#endif +#endif // ENABLE(DFG_JIT) + + union { + struct { + // It would be unwise to put anything here, as it will surely be overwritten. + } unset; + struct { + WriteBarrierBase<Structure> baseObjectStructure; + } getByIdSelf; + struct { + WriteBarrierBase<Structure> baseObjectStructure; + WriteBarrierBase<Structure> prototypeStructure; + } getByIdProto; + struct { + WriteBarrierBase<Structure> baseObjectStructure; + WriteBarrierBase<StructureChain> chain; + } getByIdChain; + struct { + PolymorphicAccessStructureList* structureList; + int listSize; + } getByIdSelfList; + struct { + PolymorphicAccessStructureList* structureList; + int listSize; + } getByIdProtoList; + struct { + WriteBarrierBase<Structure> previousStructure; + WriteBarrierBase<Structure> structure; + WriteBarrierBase<StructureChain> chain; + } putByIdTransition; + struct { + WriteBarrierBase<Structure> baseObjectStructure; + } putByIdReplace; + } u; + + MacroAssemblerCodeRef stubRoutine; + CodeLocationCall callReturnLocation; + CodeLocationLabel hotPathBegin; + }; + +} // namespace JSC + +#endif + +#endif // StructureStubInfo_h |