runtime/JSGlobalData.h

   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 "ExecutableAllocator.h"
  34 #include "JITStubs.h"
  35 #include "JSValue.h"
  36 #include "SmallStrings.h"
  37 #include "TimeoutChecker.h"
  38 #include <wtf/Forward.h>
  39 #include <wtf/HashMap.h>
  40 #include <wtf/RefCounted.h>
  41
  42 struct OpaqueJSClass;
  43 struct OpaqueJSClassContextData;
  44
  45 namespace JSC {
  46
  47     class CommonIdentifiers;
  48     class FunctionBodyNode;
  49     class IdentifierTable;
  50     class Instruction;
  51     class Interpreter;
  52     class JSGlobalObject;
  53     class JSObject;
  54     class Lexer;
  55     class Parser;
  56     class ScopeNode;
  57     class Stringifier;
  58     class Structure;
  59     class UString;
  60
  61     struct HashTable;
  62     struct VPtrSet;
  63
  64     class JSGlobalData : public RefCounted<JSGlobalData> {
  65     public:
  66         struct ClientData {
  67             virtual ~ClientData() = 0;
  68         };
  69
  70         static bool sharedInstanceExists();
  71         static JSGlobalData& sharedInstance();
  72
  73         static PassRefPtr<JSGlobalData> create(bool isShared = false);
  74         static PassRefPtr<JSGlobalData> createLeaked();
  75         ~JSGlobalData();
  76
  77 #if ENABLE(JSC_MULTIPLE_THREADS)
  78         // Will start tracking threads that use the heap, which is resource-heavy.
  79         void makeUsableFromMultipleThreads() { heap.makeUsableFromMultipleThreads(); }
  80 #endif
  81
  82         bool isSharedInstance;
  83         ClientData* clientData;
  84
  85         const HashTable* arrayTable;
  86         const HashTable* dateTable;
  87         const HashTable* jsonTable;
  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(JSVALUE32)
 101         RefPtr<Structure> numberStructure;
 102 #endif
 103
 104         void* jsArrayVPtr;
 105         void* jsByteArrayVPtr;
 106         void* jsStringVPtr;
 107         void* jsFunctionVPtr;
 108
 109         IdentifierTable* identifierTable;
 110         CommonIdentifiers* propertyNames;
 111         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.
 112         SmallStrings smallStrings;
 113
 114 #if ENABLE(ASSEMBLER)
 115         ExecutableAllocator executableAllocator;
 116 #endif
 117
 118         Lexer* lexer;
 119         Parser* parser;
 120         Interpreter* interpreter;
 121 #if ENABLE(JIT)
 122         JITThunks jitStubs;
 123 #endif
 124         TimeoutChecker timeoutChecker;
 125         Heap heap;
 126
 127         JSValue exception;
 128 #if ENABLE(JIT)
 129         ReturnAddressPtr exceptionLocation;
 130 #endif
 131
 132         const Vector<Instruction>& numericCompareFunction(ExecState*);
 133         Vector<Instruction> lazyNumericCompareFunction;
 134         bool initializingLazyNumericCompareFunction;
 135
 136         HashMap<OpaqueJSClass*, OpaqueJSClassContextData*> opaqueJSClassData;
 137
 138         JSGlobalObject* head;
 139         JSGlobalObject* dynamicGlobalObject;
 140
 141         HashSet<JSObject*> arrayVisitedElements;
 142
 143         ScopeNode* scopeNodeBeingReparsed;
 144         Stringifier* firstStringifierToMark;
 145
 146     private:
 147         JSGlobalData(bool isShared, const VPtrSet&);
 148         static JSGlobalData*& sharedInstanceInternal();
 149         void createNativeThunk();
 150     };
 151
 152 } // namespace JSC
 153
 154 #endif // JSGlobalData_h