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 #include "Instruction.h"
  30 #include "Opcode.h"
  31 #include "Structure.h"
  32
  33 namespace JSC {
  34
  35 #if ENABLE(JIT)
  36     struct StructureStubInfo {
  37         StructureStubInfo(OpcodeID opcodeID)
  38             : opcodeID(opcodeID)
  39             , stubRoutine(0)
  40             , callReturnLocation(0)
  41             , hotPathBegin(0)
  42         {
  43         }
  44
  45         void initGetByIdSelf(Structure* baseObjectStructure)
  46         {
  47             opcodeID = op_get_by_id_self;
  48
  49             u.getByIdSelf.baseObjectStructure = baseObjectStructure;
  50             baseObjectStructure->ref();
  51         }
  52
  53         void initGetByIdProto(Structure* baseObjectStructure, Structure* prototypeStructure)
  54         {
  55             opcodeID = op_get_by_id_proto;
  56
  57             u.getByIdProto.baseObjectStructure = baseObjectStructure;
  58             baseObjectStructure->ref();
  59
  60             u.getByIdProto.prototypeStructure = prototypeStructure;
  61             prototypeStructure->ref();
  62         }
  63
  64         void initGetByIdChain(Structure* baseObjectStructure, StructureChain* chain)
  65         {
  66             opcodeID = op_get_by_id_chain;
  67
  68             u.getByIdChain.baseObjectStructure = baseObjectStructure;
  69             baseObjectStructure->ref();
  70
  71             u.getByIdChain.chain = chain;
  72             chain->ref();
  73         }
  74
  75         void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
  76         {
  77             opcodeID = op_get_by_id_self_list;
  78
  79             u.getByIdProtoList.structureList = structureList;
  80             u.getByIdProtoList.listSize = listSize;
  81         }
  82
  83         void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
  84         {
  85             opcodeID = op_get_by_id_proto_list;
  86
  87             u.getByIdProtoList.structureList = structureList;
  88             u.getByIdProtoList.listSize = listSize;
  89         }
  90
  91         // PutById*
  92
  93         void initPutByIdTransition(Structure* previousStructure, Structure* structure, StructureChain* chain)
  94         {
  95             opcodeID = op_put_by_id_transition;
  96
  97             u.putByIdTransition.previousStructure = previousStructure;
  98             previousStructure->ref();
  99
 100             u.putByIdTransition.structure = structure;
 101             structure->ref();
 102
 103             u.putByIdTransition.chain = chain;
 104             chain->ref();
 105         }
 106
 107         void initPutByIdReplace(Structure* baseObjectStructure)
 108         {
 109             opcodeID = op_put_by_id_replace;
 110
 111             u.putByIdReplace.baseObjectStructure = baseObjectStructure;
 112             baseObjectStructure->ref();
 113         }
 114
 115         void deref();
 116
 117         OpcodeID opcodeID;
 118         union {
 119             struct {
 120                 Structure* baseObjectStructure;
 121             } getByIdSelf;
 122             struct {
 123                 Structure* baseObjectStructure;
 124                 Structure* prototypeStructure;
 125             } getByIdProto;
 126             struct {
 127                 Structure* baseObjectStructure;
 128                 StructureChain* chain;
 129             } getByIdChain;
 130             struct {
 131                 PolymorphicAccessStructureList* structureList;
 132                 int listSize;
 133             } getByIdSelfList;
 134             struct {
 135                 PolymorphicAccessStructureList* structureList;
 136                 int listSize;
 137             } getByIdProtoList;
 138             struct {
 139                 Structure* previousStructure;
 140                 Structure* structure;
 141                 StructureChain* chain;
 142             } putByIdTransition;
 143             struct {
 144                 Structure* baseObjectStructure;
 145             } putByIdReplace;
 146         } u;
 147
 148         void* stubRoutine;
 149         void* callReturnLocation;
 150         void* hotPathBegin;
 151     };
 152 #endif
 153
 154 } // namespace JSC
 155
 156 #endif // StructureStubInfo_h