1 | /* |
2 | * Copyright (C) 2008, 2009 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 | * |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef JSGlobalData_h |
30 | #define JSGlobalData_h |
31 | |
32 | #include "Collector.h" |
33 | #include "DateInstanceCache.h" |
34 | #include "ExecutableAllocator.h" |
35 | #include "JITStubs.h" |
36 | #include "JSValue.h" |
37 | #include "MarkStack.h" |
38 | #include "NumericStrings.h" |
39 | #include "SmallStrings.h" |
40 | #include "TimeoutChecker.h" |
41 | #include "WeakRandom.h" |
42 | #include <wtf/DateMath.h> |
43 | #include <wtf/Forward.h> |
44 | #include <wtf/HashMap.h> |
45 | #include <wtf/RefCounted.h> |
46 | |
47 | struct OpaqueJSClass; |
48 | struct OpaqueJSClassContextData; |
49 | |
50 | namespace JSC { |
51 | |
52 | class CodeBlock; |
53 | class CommonIdentifiers; |
54 | class IdentifierTable; |
55 | class Interpreter; |
56 | class JSGlobalObject; |
57 | class JSObject; |
58 | class Lexer; |
59 | class Parser; |
60 | class Stringifier; |
61 | class Structure; |
62 | class UString; |
63 | |
64 | struct HashTable; |
65 | struct Instruction; |
66 | |
67 | struct LocalTimeOffsetCache { |
68 | LocalTimeOffsetCache() |
69 | : start(0.0) |
70 | , end(-1.0) |
71 | , increment(0.0) |
72 | { |
73 | } |
74 | |
75 | void reset() |
76 | { |
77 | offset = LocalTimeOffset(); |
78 | start = 0.0; |
79 | end = -1.0; |
80 | increment = 0.0; |
81 | } |
82 | |
83 | LocalTimeOffset offset; |
84 | double start; |
85 | double end; |
86 | double increment; |
87 | }; |
88 | |
89 | class JSGlobalData : public RefCounted<JSGlobalData> { |
90 | public: |
91 | struct ClientData { |
92 | virtual ~ClientData() = 0; |
93 | #ifdef QT_BUILD_SCRIPT_LIB |
94 | virtual void mark(MarkStack&) {} |
95 | virtual void uncaughtException(ExecState*, unsigned bytecodeOffset, JSValue) = 0; |
96 | #endif |
97 | }; |
98 | |
99 | static bool sharedInstanceExists(); |
100 | static JSGlobalData& sharedInstance(); |
101 | |
102 | static PassRefPtr<JSGlobalData> create(); |
103 | static PassRefPtr<JSGlobalData> createLeaked(); |
104 | static PassRefPtr<JSGlobalData> createNonDefault(); |
105 | ~JSGlobalData(); |
106 | |
107 | #if ENABLE(JSC_MULTIPLE_THREADS) |
108 | // Will start tracking threads that use the heap, which is resource-heavy. |
109 | void makeUsableFromMultipleThreads() { heap.makeUsableFromMultipleThreads(); } |
110 | #endif |
111 | |
112 | bool isSharedInstance; |
113 | ClientData* clientData; |
114 | |
115 | const HashTable* arrayTable; |
116 | const HashTable* dateTable; |
117 | const HashTable* jsonTable; |
118 | const HashTable* mathTable; |
119 | const HashTable* numberTable; |
120 | const HashTable* regExpTable; |
121 | const HashTable* regExpConstructorTable; |
122 | const HashTable* stringTable; |
123 | |
124 | RefPtr<Structure> activationStructure; |
125 | RefPtr<Structure> interruptedExecutionErrorStructure; |
126 | RefPtr<Structure> staticScopeStructure; |
127 | RefPtr<Structure> stringStructure; |
128 | RefPtr<Structure> notAnObjectErrorStubStructure; |
129 | RefPtr<Structure> notAnObjectStructure; |
130 | RefPtr<Structure> propertyNameIteratorStructure; |
131 | RefPtr<Structure> getterSetterStructure; |
132 | RefPtr<Structure> apiWrapperStructure; |
133 | RefPtr<Structure> dummyMarkableCellStructure; |
134 | |
135 | #if USE(JSVALUE32) |
136 | RefPtr<Structure> numberStructure; |
137 | #endif |
138 | |
139 | static void storeVPtrs(); |
140 | static JS_EXPORTDATA void* jsArrayVPtr; |
141 | static JS_EXPORTDATA void* jsByteArrayVPtr; |
142 | static JS_EXPORTDATA void* jsStringVPtr; |
143 | static JS_EXPORTDATA void* jsFunctionVPtr; |
144 | |
145 | IdentifierTable* identifierTable; |
146 | CommonIdentifiers* propertyNames; |
147 | const MarkedArgumentBuffer* emptyList; // Lists are supposed to be allocated on the stack to have their elements properly marked, which is not the case here - but this list has nothing to mark. |
148 | SmallStrings smallStrings; |
149 | NumericStrings numericStrings; |
150 | DateInstanceCache dateInstanceCache; |
151 | |
152 | #if ENABLE(ASSEMBLER) |
153 | ExecutableAllocator executableAllocator; |
154 | #endif |
155 | |
156 | Lexer* lexer; |
157 | Parser* parser; |
158 | Interpreter* interpreter; |
159 | #if ENABLE(JIT) |
160 | JITThunks jitStubs; |
161 | #endif |
162 | TimeoutChecker* timeoutChecker; |
163 | Heap heap; |
164 | |
165 | JSValue exception; |
166 | #if ENABLE(JIT) |
167 | ReturnAddressPtr exceptionLocation; |
168 | #endif |
169 | |
170 | const Vector<Instruction>& numericCompareFunction(ExecState*); |
171 | Vector<Instruction> lazyNumericCompareFunction; |
172 | bool initializingLazyNumericCompareFunction; |
173 | |
174 | HashMap<OpaqueJSClass*, OpaqueJSClassContextData*> opaqueJSClassData; |
175 | |
176 | JSGlobalObject* head; |
177 | JSGlobalObject* dynamicGlobalObject; |
178 | |
179 | HashSet<JSObject*> arrayVisitedElements; |
180 | |
181 | CodeBlock* functionCodeBlockBeingReparsed; |
182 | Stringifier* firstStringifierToMark; |
183 | |
184 | MarkStack markStack; |
185 | |
186 | LocalTimeOffsetCache localTimeOffsetCache; |
187 | |
188 | UString cachedDateString; |
189 | double cachedDateStringValue; |
190 | |
191 | #ifndef NDEBUG |
192 | bool mainThreadOnly; |
193 | #endif |
194 | |
195 | void resetDateCache(); |
196 | |
197 | void startSampling(); |
198 | void stopSampling(); |
199 | void dumpSampleData(ExecState* exec); |
200 | private: |
201 | JSGlobalData(bool isShared); |
202 | static JSGlobalData*& sharedInstanceInternal(); |
203 | void createNativeThunk(); |
204 | }; |
205 | |
206 | } // namespace JSC |
207 | |
208 | #endif // JSGlobalData_h |
209 | |