bytecode/StructureStubInfo.h

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef StructureStubInfo_h
  27 #define StructureStubInfo_h
  28
  29 #if ENABLE(JIT)
  30
  31 #include "Instruction.h"
  32 #include "MacroAssembler.h"
  33 #include "Opcode.h"
  34 #include "Structure.h"
  35
  36 namespace JSC {
  37
  38     struct StructureStubInfo {
  39         StructureStubInfo(OpcodeID opcodeID)
  40             : opcodeID(opcodeID)
  41         {
  42         }
  43
  44         void initGetByIdSelf(Structure* baseObjectStructure)
  45         {
  46             opcodeID = op_get_by_id_self;
  47
  48             u.getByIdSelf.baseObjectStructure = baseObjectStructure;
  49             baseObjectStructure->ref();
  50         }
  51
  52         void initGetByIdProto(Structure* baseObjectStructure, Structure* prototypeStructure)
  53         {
  54             opcodeID = op_get_by_id_proto;
  55
  56             u.getByIdProto.baseObjectStructure = baseObjectStructure;
  57             baseObjectStructure->ref();
  58
  59             u.getByIdProto.prototypeStructure = prototypeStructure;
  60             prototypeStructure->ref();
  61         }
  62
  63         void initGetByIdChain(Structure* baseObjectStructure, StructureChain* chain)
  64         {
  65             opcodeID = op_get_by_id_chain;
  66
  67             u.getByIdChain.baseObjectStructure = baseObjectStructure;
  68             baseObjectStructure->ref();
  69
  70             u.getByIdChain.chain = chain;
  71             chain->ref();
  72         }
  73
  74         void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
  75         {
  76             opcodeID = op_get_by_id_self_list;
  77
  78             u.getByIdProtoList.structureList = structureList;
  79             u.getByIdProtoList.listSize = listSize;
  80         }
  81
  82         void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
  83         {
  84             opcodeID = op_get_by_id_proto_list;
  85
  86             u.getByIdProtoList.structureList = structureList;
  87             u.getByIdProtoList.listSize = listSize;
  88         }
  89
  90         // PutById*
  91
  92         void initPutByIdTransition(Structure* previousStructure, Structure* structure, StructureChain* chain)
  93         {
  94             opcodeID = op_put_by_id_transition;
  95
  96             u.putByIdTransition.previousStructure = previousStructure;
  97             previousStructure->ref();
  98
  99             u.putByIdTransition.structure = structure;
 100             structure->ref();
 101
 102             u.putByIdTransition.chain = chain;
 103             chain->ref();
 104         }
 105
 106         void initPutByIdReplace(Structure* baseObjectStructure)
 107         {
 108             opcodeID = op_put_by_id_replace;
 109
 110             u.putByIdReplace.baseObjectStructure = baseObjectStructure;
 111             baseObjectStructure->ref();
 112         }
 113
 114         void deref();
 115
 116         OpcodeID opcodeID;
 117         union {
 118             struct {
 119                 Structure* baseObjectStructure;
 120             } getByIdSelf;
 121             struct {
 122                 Structure* baseObjectStructure;
 123                 Structure* prototypeStructure;
 124             } getByIdProto;
 125             struct {
 126                 Structure* baseObjectStructure;
 127                 StructureChain* chain;
 128             } getByIdChain;
 129             struct {
 130                 PolymorphicAccessStructureList* structureList;
 131                 int listSize;
 132             } getByIdSelfList;
 133             struct {
 134                 PolymorphicAccessStructureList* structureList;
 135                 int listSize;
 136             } getByIdProtoList;
 137             struct {
 138                 Structure* previousStructure;
 139                 Structure* structure;
 140                 StructureChain* chain;
 141             } putByIdTransition;
 142             struct {
 143                 Structure* baseObjectStructure;
 144             } putByIdReplace;
 145         } u;
 146
 147         CodeLocationLabel stubRoutine;
 148         CodeLocationCall callReturnLocation;
 149         CodeLocationLabel hotPathBegin;
 150     };
 151
 152 } // namespace JSC
 153
 154 #endif
 155
 156 #endif // StructureStubInfo_h