codeblock.h

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            if (pos != lastPos) {
                m_linkedCallerList[pos] = m_linkedCallerList[lastPos];
                m_linkedCallerList[pos]->position = pos;
            }
            m_linkedCallerList.shrink(lastPos);
        }

        StructureStubInfo& getStubInfo(void* returnAddress)
        {
            return *(binaryChop<StructureStubInfo, void*, getStructureStubInfoReturnLocation>(m_structureStubInfos.begin(), m_structureStubInfos.size(), returnAddress));
        }

        CallLinkInfo& getCallLinkInfo(void* returnAddress)
        {
            return *(binaryChop<CallLinkInfo, void*, getCallLinkInfoReturnLocation>(m_callLinkInfos.begin(), m_callLinkInfos.size(), returnAddress));
        }

        unsigned getBytecodeIndex(CallFrame* callFrame, void* nativePC)
        {
            reparseForExceptionInfoIfNecessary(callFrame);
            return binaryChop<CallReturnOffsetToBytecodeIndex, unsigned, getCallReturnOffset>(m_exceptionInfo->m_callReturnIndexVector.begin(), m_exceptionInfo->m_callReturnIndexVector.size(), m_jitCode.code.offsetOf(nativePC))->bytecodeIndex;
        }
        
        bool functionRegisterForBytecodeOffset(unsigned bytecodeOffset, int& functionRegisterIndex);
#endif

        void setIsNumericCompareFunction(bool isNumericCompareFunction) { m_isNumericCompareFunction = isNumericCompareFunction; }
        bool isNumericCompareFunction() { return m_isNumericCompareFunction; }

        Vector<Instruction>& instructions() { return m_instructions; }
#ifndef NDEBUG
        void setInstructionCount(unsigned instructionCount) { m_instructionCount = instructionCount; }
#endif

#if ENABLE(JIT)
        void setJITCode(JITCodeRef& jitCode);
        JITCode jitCode() { return m_jitCode.code; }
        ExecutablePool* executablePool() { return m_jitCode.executablePool.get(); }
#endif

        ScopeNode* ownerNode() const { return m_ownerNode; }

        void setGlobalData(JSGlobalData* globalData) { m_globalData = globalData; }

        void setThisRegister(int thisRegister) { m_thisRegister = thisRegister; }
        int thisRegister() const { return m_thisRegister; }

        void setNeedsFullScopeChain(bool needsFullScopeChain) { m_needsFullScopeChain = needsFullScopeChain; }
        bool needsFullScopeChain() const { return m_needsFullScopeChain; }
        void setUsesEval(bool usesEval) { m_usesEval = usesEval; }
        bool usesEval() const { return m_usesEval; }
        void setUsesArguments(bool usesArguments) { m_usesArguments = usesArguments; }
        bool usesArguments() const { return m_usesArguments; }

        CodeType codeType() const { return m_codeType; }

        SourceProvider* source() const { return m_source.get(); }
        unsigned sourceOffset() const { return m_sourceOffset; }

        size_t numberOfJumpTargets() const { return m_jumpTargets.size(); }
        void addJumpTarget(unsigned jumpTarget) { m_jumpTargets.append(jumpTarget); }
        unsigned jumpTarget(int index) const { return m_jumpTargets[index]; }
        unsigned lastJumpTarget() const { return m_jumpTargets.last(); }

#if !ENABLE(JIT)
        void addPropertyAccessInstruction(unsigned propertyAccessInstruction) { m_propertyAccessInstructions.append(propertyAccessInstruction); }
        void addGlobalResolveInstruction(unsigned globalResolveInstruction) { m_globalResolveInstructions.append(globalResolveInstruction); }
        bool hasGlobalResolveInstructionAtBytecodeOffset(unsigned bytecodeOffset);
#else
        size_t numberOfStructureStubInfos() const { return m_structureStubInfos.size(); }
        void addStructureStubInfo(const StructureStubInfo& stubInfo) { m_structureStubInfos.append(stubInfo); }
        StructureStubInfo& structureStubInfo(int index) { return m_structureStubInfos[index]; }

        void addGlobalResolveInfo(unsigned globalResolveInstruction) { m_globalResolveInfos.append(GlobalResolveInfo(globalResolveInstruction)); }
        GlobalResolveInfo& globalResolveInfo(int index) { return m_globalResolveInfos[index]; }
        bool hasGlobalResolveInfoAtBytecodeOffset(unsigned bytecodeOffset);

        size_t numberOfCallLinkInfos() const { return m_callLinkInfos.size(); }
        void addCallLinkInfo() { m_callLinkInfos.append(CallLinkInfo()); }
        CallLinkInfo& callLinkInfo(int index) { return m_callLinkInfos[index]; }

        void addFunctionRegisterInfo(unsigned bytecodeOffset, int functionIndex) { createRareDataIfNecessary(); m_rareData->m_functionRegisterInfos.append(FunctionRegisterInfo(bytecodeOffset, functionIndex)); }
#endif

        // Exception handling support

        size_t numberOfExceptionHandlers() const { return m_rareData ? m_rareData->m_exceptionHandlers.size() : 0; }
        void addExceptionHandler(const HandlerInfo& hanler) { createRareDataIfNecessary(); return m_rareData->m_exceptionHandlers.append(hanler); }
        HandlerInfo& exceptionHandler(int index) { ASSERT(m_rareData); return m_rareData->m_exceptionHandlers[index]; }

        bool hasExceptionInfo() const { return m_exceptionInfo; }
        void clearExceptionInfo() { m_exceptionInfo.clear(); }

        void addExpressionInfo(const ExpressionRangeInfo& expressionInfo) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_expressionInfo.append(expressionInfo); }
        void addGetByIdExceptionInfo(const GetByIdExceptionInfo& info) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_getByIdExceptionInfo.append(info); }

        size_t numberOfLineInfos() const { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_lineInfo.size(); }
        void addLineInfo(const LineInfo& lineInfo) { ASSERT(m_exceptionInfo); m_exceptionInfo->m_lineInfo.append(lineInfo); }
        LineInfo& lastLineInfo() { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_lineInfo.last(); }

#if ENABLE(JIT)
        Vector<CallReturnOffsetToBytecodeIndex>& callReturnIndexVector() { ASSERT(m_exceptionInfo); return m_exceptionInfo->m_callReturnIndexVector; }
#endif

        // Constant Pool

        size_t numberOfIdentifiers() const { return m_identifiers.size(); }
        void addIdentifier(const Identifier& i) { return m_identifiers.append(i); }
        Identifier& identifier(int index) { return m_identifiers[index]; }

        size_t numberOfConstantRegisters() const { return m_constantRegisters.size(); }
        void addConstantRegister(const Register& r) { return m_constantRegisters.append(r); }
        Register& constantRegister(int index) { return m_constantRegisters[index]; }

        unsigned addFunctionExpression(FuncExprNode* n) { unsigned size = m_functionExpressions.size(); m_functionExpressions.append(n); return size; }
        FuncExprNode* functionExpression(int index) const { return m_functionExpressions[index].get(); }

        unsigned addFunction(FuncDeclNode* n) { createRareDataIfNecessary(); unsigned size = m_rareData->m_functions.size(); m_rareData->m_functions.append(n); return size; }
        FuncDeclNode* function(int index) const { ASSERT(m_rareData); return m_rareData->m_functions[index].get(); }

        bool hasFunctions() const { return m_functionExpressions.size() || (m_rareData && m_rareData->m_functions.size()); }

        unsigned addUnexpectedConstant(JSValuePtr v) { createRareDataIfNecessary(); unsigned size = m_rareData->m_unexpectedConstants.size(); m_rareData->m_unexpectedConstants.append(v); return size; }
        JSValuePtr unexpectedConstant(int index) const { ASSERT(m_rareData); return m_rareData->m_unexpectedConstants[index]; }

        unsigned addRegExp(RegExp* r) { createRareDataIfNecessary(); unsigned size = m_rareData->m_regexps.size(); m_rareData->m_regexps.append(r); return size; }
        RegExp* regexp(int index) const { ASSERT(m_rareData); return m_rareData->m_regexps[index].get(); }


        // Jump Tables

        size_t numberOfImmediateSwitchJumpTables() const { return m_rareData ? m_rareData->m_immediateSwitchJumpTables.size() : 0; }
        SimpleJumpTable& addImmediateSwitchJumpTable() { createRareDataIfNecessary(); m_rareData->m_immediateSwitchJumpTables.append(SimpleJumpTable()); return m_rareData->m_immediateSwitchJumpTables.last(); }
        SimpleJumpTable& immediateSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_immediateSwitchJumpTables[tableIndex]; }

        size_t numberOfCharacterSwitchJumpTables() const { return m_rareData ? m_rareData->m_characterSwitchJumpTables.size() : 0; }
        SimpleJumpTable& addCharacterSwitchJumpTable() { createRareDataIfNecessary(); m_rareData->m_characterSwitchJumpTables.append(SimpleJumpTable()); return m_rareData->m_characterSwitchJumpTables.last(); }
        SimpleJumpTable& characterSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_characterSwitchJumpTables[tableIndex]; }

        size_t numberOfStringSwitchJumpTables() const { return m_rareData ? m_rareData->m_stringSwitchJumpTables.size() : 0; }
        StringJumpTable& addStringSwitchJumpTable() { createRareDataIfNecessary(); m_rareData->m_stringSwitchJumpTables.append(StringJumpTable()); return m_rareData->m_stringSwitchJumpTables.last(); }
        StringJumpTable& stringSwitchJumpTable(int tableIndex) { ASSERT(m_rareData); return m_rareData->m_stringSwitchJumpTables[tableIndex]; }


        SymbolTable& symbolTable() { return m_symbolTable; }

        EvalCodeCache& evalCodeCache() { createRareDataIfNecessary(); return m_rareData->m_evalCodeCache; }

        void shrinkToFit();

        // FIXME: Make these remaining members private.

        int m_numCalleeRegisters;
        // NOTE: numConstants holds the number of constant registers allocated
        // by the code generator, not the number of constant registers used.
        // (Duplicate constants are uniqued during code generation, and spare
        // constant registers may be allocated.)
        int m_numConstants;
        int m_numVars;
        int m_numParameters;

    private:
#if !defined(NDEBUG) || ENABLE(OPCODE_SAMPLING)
        void dump(ExecState*, const Vector<Instruction>::const_iterator& begin, Vector<Instruction>::const_iterator&) const;
#endif

        void reparseForExceptionInfoIfNecessary(CallFrame*);

        void createRareDataIfNecessary()
        {
            if (!m_rareData)
                m_rareData.set(new RareData);
        }

        ScopeNode* m_ownerNode;
        JSGlobalData* m_globalData;

        Vector<Instruction> m_instructions;
#ifndef NDEBUG
        unsigned m_instructionCount;
#endif
#if ENABLE(JIT)
        JITCodeRef m_jitCode;
#endif

        int m_thisRegister;

        bool m_needsFullScopeChain;
        bool m_usesEval;
        bool m_usesArguments;
        bool m_isNumericCompareFunction;

        CodeType m_codeType;

        RefPtr<SourceProvider> m_source;
        unsigned m_sourceOffset;

#if !ENABLE(JIT)
        Vector<unsigned> m_propertyAccessInstructions;
        Vector<unsigned> m_globalResolveInstructions;
#else
        Vector<StructureStubInfo> m_structureStubInfos;
        Vector<GlobalResolveInfo> m_globalResolveInfos;
        Vector<CallLinkInfo> m_callLinkInfos;
        Vector<CallLinkInfo*> m_linkedCallerList;
#endif

        Vector<unsigned> m_jumpTargets;

        // Constant Pool
        Vector<Identifier> m_identifiers;
        Vector<Register> m_constantRegisters;
        Vector<RefPtr<FuncExprNode> > m_functionExpressions;

        SymbolTable m_symbolTable;

        struct ExceptionInfo {
            Vector<ExpressionRangeInfo> m_expressionInfo;
            Vector<LineInfo> m_lineInfo;
            Vector<GetByIdExceptionInfo> m_getByIdExceptionInfo;

#if ENABLE(JIT)
            Vector<CallReturnOffsetToBytecodeIndex> m_callReturnIndexVector;
#endif
        };
        OwnPtr<ExceptionInfo> m_exceptionInfo;

        struct RareData {
            Vector<HandlerInfo> m_exceptionHandlers;

            // Rare Constants
            Vector<RefPtr<FuncDeclNode> > m_functions;
            Vector<JSValuePtr> m_unexpectedConstants;
            Vector<RefPtr<RegExp> > m_regexps;

            // Jump Tables
            Vector<SimpleJumpTable> m_immediateSwitchJumpTables;
            Vector<SimpleJumpTable> m_characterSwitchJumpTables;
            Vector<StringJumpTable> m_stringSwitchJumpTables;

            EvalCodeCache m_evalCodeCache;

#if ENABLE(JIT)
            Vector<FunctionRegisterInfo> m_functionRegisterInfos;
#endif
        };
        OwnPtr<RareData> m_rareData;
    };

    // Program code is not marked by any function, so we make the global object
    // responsible for marking it.

    class ProgramCodeBlock : public CodeBlock {
    public:
        ProgramCodeBlock(ScopeNode* ownerNode, CodeType codeType, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider)
            : CodeBlock(ownerNode, codeType, sourceProvider, 0)
            , m_globalObject(globalObject)
        {
            m_globalObject->codeBlocks().add(this);
        }

        ~ProgramCodeBlock()
        {
            if (m_globalObject)
                m_globalObject->codeBlocks().remove(this);
        }

        void clearGlobalObject() { m_globalObject = 0; }

    private:
        JSGlobalObject* m_globalObject; // For program and eval nodes, the global object that marks the constant pool.
    };

    class EvalCodeBlock : public ProgramCodeBlock {
    public:
        EvalCodeBlock(ScopeNode* ownerNode, JSGlobalObject* globalObject, PassRefPtr<SourceProvider> sourceProvider, int baseScopeDepth)
            : ProgramCodeBlock(ownerNode, EvalCode, globalObject, sourceProvider)
            , m_baseScopeDepth(baseScopeDepth)
        {
        }

        int baseScopeDepth() const { return m_baseScopeDepth; }

    private:
        int m_baseScopeDepth;
    };

} // namespace JSC

#endif // CodeBlock_h