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_get_by_id, |
47 | access_put_by_id, |
48 | access_get_by_id_generic, |
49 | access_put_by_id_generic, |
50 | access_get_array_length, |
51 | access_get_string_length, |
52 | }; |
53 | |
54 | struct StructureStubInfo { |
55 | StructureStubInfo(AccessType accessType) |
56 | : accessType(accessType) |
57 | , seen(false) |
58 | { |
59 | } |
60 | |
61 | void initGetByIdSelf(Structure* baseObjectStructure) |
62 | { |
63 | accessType = access_get_by_id_self; |
64 | |
65 | u.getByIdSelf.baseObjectStructure = baseObjectStructure; |
66 | baseObjectStructure->ref(); |
67 | } |
68 | |
69 | void initGetByIdProto(Structure* baseObjectStructure, Structure* prototypeStructure) |
70 | { |
71 | accessType = access_get_by_id_proto; |
72 | |
73 | u.getByIdProto.baseObjectStructure = baseObjectStructure; |
74 | baseObjectStructure->ref(); |
75 | |
76 | u.getByIdProto.prototypeStructure = prototypeStructure; |
77 | prototypeStructure->ref(); |
78 | } |
79 | |
80 | void initGetByIdChain(Structure* baseObjectStructure, StructureChain* chain) |
81 | { |
82 | accessType = access_get_by_id_chain; |
83 | |
84 | u.getByIdChain.baseObjectStructure = baseObjectStructure; |
85 | baseObjectStructure->ref(); |
86 | |
87 | u.getByIdChain.chain = chain; |
88 | chain->ref(); |
89 | } |
90 | |
91 | void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize) |
92 | { |
93 | accessType = access_get_by_id_self_list; |
94 | |
95 | u.getByIdProtoList.structureList = structureList; |
96 | u.getByIdProtoList.listSize = listSize; |
97 | } |
98 | |
99 | void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize) |
100 | { |
101 | accessType = access_get_by_id_proto_list; |
102 | |
103 | u.getByIdProtoList.structureList = structureList; |
104 | u.getByIdProtoList.listSize = listSize; |
105 | } |
106 | |
107 | // PutById* |
108 | |
109 | void initPutByIdTransition(Structure* previousStructure, Structure* structure, StructureChain* chain) |
110 | { |
111 | accessType = access_put_by_id_transition; |
112 | |
113 | u.putByIdTransition.previousStructure = previousStructure; |
114 | previousStructure->ref(); |
115 | |
116 | u.putByIdTransition.structure = structure; |
117 | structure->ref(); |
118 | |
119 | u.putByIdTransition.chain = chain; |
120 | chain->ref(); |
121 | } |
122 | |
123 | void initPutByIdReplace(Structure* baseObjectStructure) |
124 | { |
125 | accessType = access_put_by_id_replace; |
126 | |
127 | u.putByIdReplace.baseObjectStructure = baseObjectStructure; |
128 | baseObjectStructure->ref(); |
129 | } |
130 | |
131 | void deref(); |
132 | |
133 | bool seenOnce() |
134 | { |
135 | return seen; |
136 | } |
137 | |
138 | void setSeen() |
139 | { |
140 | seen = true; |
141 | } |
142 | |
143 | int accessType : 31; |
144 | int seen : 1; |
145 | |
146 | union { |
147 | struct { |
148 | Structure* baseObjectStructure; |
149 | } getByIdSelf; |
150 | struct { |
151 | Structure* baseObjectStructure; |
152 | Structure* prototypeStructure; |
153 | } getByIdProto; |
154 | struct { |
155 | Structure* baseObjectStructure; |
156 | 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 | Structure* previousStructure; |
168 | Structure* structure; |
169 | StructureChain* chain; |
170 | } putByIdTransition; |
171 | struct { |
172 | Structure* baseObjectStructure; |
173 | } putByIdReplace; |
174 | } u; |
175 | |
176 | CodeLocationLabel stubRoutine; |
177 | CodeLocationCall callReturnLocation; |
178 | CodeLocationLabel hotPathBegin; |
179 | }; |
180 | |
181 | } // namespace JSC |
182 | |
183 | #endif |
184 | |
185 | #endif // StructureStubInfo_h |
186 | |