runtime/JSGlobalData.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  *
   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 <wtf/Forward.h>
  33 #include <wtf/HashMap.h>
  34 #include <wtf/RefCounted.h>
  35 #include "Collector.h"
  36 #include "ExecutableAllocator.h"
  37 #include "SmallStrings.h"
  38 #include "JSValue.h"
  39
  40 struct OpaqueJSClass;
  41 struct OpaqueJSClassContextData;
  42
  43 namespace JSC {
  44
  45     class ArgList;
  46     class CommonIdentifiers;
  47     class Heap;
  48     class IdentifierTable;
  49     class Instruction;
  50     class Interpreter;
  51     class JSGlobalObject;
  52     class JSObject;
  53     class Lexer;
  54     class Parser;
  55     class ParserRefCounted;
  56     class ScopeNode;
  57     class Structure;
  58     class UString;
  59     struct HashTable;
  60
  61     class JSGlobalData : public RefCounted<JSGlobalData> {
  62     public:
  63         static bool sharedInstanceExists();
  64         static JSGlobalData& sharedInstance();
  65
  66         static PassRefPtr<JSGlobalData> create();
  67         static PassRefPtr<JSGlobalData> createLeaked();
  68         ~JSGlobalData();
  69
  70 #if ENABLE(JSC_MULTIPLE_THREADS)
  71         // Will start tracking threads that use the heap, which is resource-heavy.
  72         void makeUsableFromMultipleThreads() { heap.makeUsableFromMultipleThreads(); }
  73 #endif
  74
  75         const Vector<Instruction>& numericCompareFunction(ExecState*);
  76         Vector<Instruction> lazyNumericCompareFunction;
  77         bool initializingLazyNumericCompareFunction;
  78
  79         Interpreter* interpreter;
  80
  81         JSValuePtr exception;
  82 #if ENABLE(JIT)
  83         void* exceptionLocation;
  84 #endif
  85
  86         const HashTable* arrayTable;
  87         const HashTable* dateTable;
  88         const HashTable* mathTable;
  89         const HashTable* numberTable;
  90         const HashTable* regExpTable;
  91         const HashTable* regExpConstructorTable;
  92         const HashTable* stringTable;
  93
  94         RefPtr<Structure> activationStructure;
  95         RefPtr<Structure> interruptedExecutionErrorStructure;
  96         RefPtr<Structure> staticScopeStructure;
  97         RefPtr<Structure> stringStructure;
  98         RefPtr<Structure> notAnObjectErrorStubStructure;
  99         RefPtr<Structure> notAnObjectStructure;
 100 #if !USE(ALTERNATE_JSIMMEDIATE)
 101         RefPtr<Structure> numberStructure;
 102 #endif
 103
 104         IdentifierTable* identifierTable;
 105         CommonIdentifiers* propertyNames;
 106         const ArgList* 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.
 107
 108         SmallStrings smallStrings;
 109
 110         HashMap<OpaqueJSClass*, OpaqueJSClassContextData*> opaqueJSClassData;
 111
 112         HashSet<ParserRefCounted*>* newParserObjects;
 113         HashCountedSet<ParserRefCounted*>* parserObjectExtraRefCounts;
 114
 115         Lexer* lexer;
 116         Parser* parser;
 117
 118         JSGlobalObject* head;
 119         JSGlobalObject* dynamicGlobalObject;
 120
 121         bool isSharedInstance;
 122
 123         struct ClientData {
 124             virtual ~ClientData() = 0;
 125         };
 126
 127         ClientData* clientData;
 128
 129         HashSet<JSObject*> arrayVisitedElements;
 130
 131         ScopeNode* scopeNodeBeingReparsed;
 132
 133         Heap heap;
 134 #if ENABLE(ASSEMBLER)
 135         PassRefPtr<ExecutablePool> poolForSize(size_t n) { return m_executableAllocator.poolForSize(n); }
 136 #endif
 137     private:
 138         JSGlobalData(bool isShared = false);
 139 #if ENABLE(ASSEMBLER)
 140         ExecutableAllocator m_executableAllocator;
 141 #endif
 142
 143         static JSGlobalData*& sharedInstanceInternal();
 144     };
 145
 146 }
 147
 148 #endif