code.vuplus.com Git - vuplus_webkit/blob - Source/JavaScriptCore/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     enum AccessType {
  39         access_get_by_id_self,
  40         access_get_by_id_proto,
  41         access_get_by_id_chain,
  42         access_get_by_id_self_list,
  43         access_get_by_id_proto_list,
  44         access_put_by_id_transition,
  45         access_put_by_id_replace,
  46         access_unset,
  47         access_get_by_id_generic,
  48         access_put_by_id_generic,
  49         access_get_array_length,
  50         access_get_string_length,
  51     };
  52
  53     struct StructureStubInfo {
  54         StructureStubInfo()
  55             : accessType(access_unset)
  56             , seen(false)
  57         {
  58         }
  59
  60         void initGetByIdSelf(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure)
  61         {
  62             accessType = access_get_by_id_self;
  63
  64             u.getByIdSelf.baseObjectStructure.set(globalData, owner, baseObjectStructure);
  65         }
  66
  67         void initGetByIdProto(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, Structure* prototypeStructure)
  68         {
  69             accessType = access_get_by_id_proto;
  70
  71             u.getByIdProto.baseObjectStructure.set(globalData, owner, baseObjectStructure);
  72             u.getByIdProto.prototypeStructure.set(globalData, owner, prototypeStructure);
  73         }
  74
  75         void initGetByIdChain(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, StructureChain* chain)
  76         {
  77             accessType = access_get_by_id_chain;
  78
  79             u.getByIdChain.baseObjectStructure.set(globalData, owner, baseObjectStructure);
  80             u.getByIdChain.chain.set(globalData, owner, chain);
  81         }
  82
  83         void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
  84         {
  85             accessType = access_get_by_id_self_list;
  86
  87             u.getByIdProtoList.structureList = structureList;
  88             u.getByIdProtoList.listSize = listSize;
  89         }
  90
  91         void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
  92         {
  93             accessType = access_get_by_id_proto_list;
  94
  95             u.getByIdProtoList.structureList = structureList;
  96             u.getByIdProtoList.listSize = listSize;
  97         }
  98
  99         // PutById*
 100
 101         void initPutByIdTransition(JSGlobalData& globalData, JSCell* owner, Structure* previousStructure, Structure* structure, StructureChain* chain)
 102         {
 103             accessType = access_put_by_id_transition;
 104
 105             u.putByIdTransition.previousStructure.set(globalData, owner, previousStructure);
 106             u.putByIdTransition.structure.set(globalData, owner, structure);
 107             u.putByIdTransition.chain.set(globalData, owner, chain);
 108         }
 109
 110         void initPutByIdReplace(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure)
 111         {
 112             accessType = access_put_by_id_replace;
 113
 114             u.putByIdReplace.baseObjectStructure.set(globalData, owner, baseObjectStructure);
 115         }
 116
 117         void deref();
 118         void visitAggregate(SlotVisitor&);
 119
 120         bool seenOnce()
 121         {
 122             return seen;
 123         }
 124
 125         void setSeen()
 126         {
 127             seen = true;
 128         }
 129
 130         int8_t accessType;
 131         int8_t seen;
 132
 133 #if ENABLE(DFG_JIT)
 134         int8_t baseGPR;
 135         int8_t valueGPR;
 136         int8_t scratchGPR;
 137         int16_t deltaCallToDone;
 138         int16_t deltaCallToStructCheck;
 139         int16_t deltaCallToSlowCase;
 140 #endif
 141
 142         union {
 143             struct {
 144                 int16_t deltaCheckImmToCall;
 145                 int16_t deltaCallToLoadOrStore;
 146             } unset;
 147             struct {
 148                 WriteBarrierBase<Structure> baseObjectStructure;
 149             } getByIdSelf;
 150             struct {
 151                 WriteBarrierBase<Structure> baseObjectStructure;
 152                 WriteBarrierBase<Structure> prototypeStructure;
 153             } getByIdProto;
 154             struct {
 155                 WriteBarrierBase<Structure> baseObjectStructure;
 156                 WriteBarrierBase<StructureChain> chain;
 157             } getByIdChain;
 158             struct {
 159                 PolymorphicAccessStructureList* structureList;
 160                 int listSize;
 161             } getByIdSelfList;
 162             struct {
 163                 PolymorphicAccessStructureList* structureList;
 164                 int listSize;
 165             } getByIdProtoList;
 166             struct {
 167                 WriteBarrierBase<Structure> previousStructure;
 168                 WriteBarrierBase<Structure> structure;
 169                 WriteBarrierBase<StructureChain> chain;
 170             } putByIdTransition;
 171             struct {
 172                 WriteBarrierBase<Structure> baseObjectStructure;
 173             } putByIdReplace;
 174         } u;
 175
 176         MacroAssemblerCodeRef stubRoutine;
 177         CodeLocationCall callReturnLocation;
 178         CodeLocationLabel hotPathBegin;
 179     };
 180
 181 } // namespace JSC
 182
 183 #endif
 184
 185 #endif // StructureStubInfo_h