Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 410 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/Executable.h b/Source/JavaScriptCore/runtime/Executable.h
new file mode 100644
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+++ b/Source/JavaScriptCore/runtime/Executable.h
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+/*
+ * Copyright (C) 2009, 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef Executable_h
+#define Executable_h
+
+#include "CallData.h"
+#include "JSFunction.h"
+#include "Interpreter.h"
+#include "Nodes.h"
+#include "SamplingTool.h"
+#include <wtf/PassOwnPtr.h>
+
+namespace JSC {
+
+    class CodeBlock;
+    class Debugger;
+    class EvalCodeBlock;
+    class FunctionCodeBlock;
+    class ProgramCodeBlock;
+    class ScopeChainNode;
+
+    struct ExceptionInfo;
+
+    class ExecutableBase : public RefCounted<ExecutableBase> {
+        friend class JIT;
+
+    protected:
+        static const int NUM_PARAMETERS_IS_HOST = 0;
+        static const int NUM_PARAMETERS_NOT_COMPILED = -1;
+    
+    public:
+        ExecutableBase(int numParameters)
+            : m_numParametersForCall(numParameters)
+            , m_numParametersForConstruct(numParameters)
+        {
+        }
+
+        virtual ~ExecutableBase() {}
+
+        bool isHostFunction() const
+        {
+            ASSERT((m_numParametersForCall == NUM_PARAMETERS_IS_HOST) == (m_numParametersForConstruct == NUM_PARAMETERS_IS_HOST));
+            return m_numParametersForCall == NUM_PARAMETERS_IS_HOST;
+        }
+
+    protected:
+        int m_numParametersForCall;
+        int m_numParametersForConstruct;
+
+#if ENABLE(JIT)
+    public:
+        JITCode& generatedJITCodeForCall()
+        {
+            ASSERT(m_jitCodeForCall);
+            return m_jitCodeForCall;
+        }
+
+        JITCode& generatedJITCodeForConstruct()
+        {
+            ASSERT(m_jitCodeForConstruct);
+            return m_jitCodeForConstruct;
+        }
+
+    protected:
+        JITCode m_jitCodeForCall;
+        JITCode m_jitCodeForConstruct;
+        MacroAssemblerCodePtr m_jitCodeForCallWithArityCheck;
+        MacroAssemblerCodePtr m_jitCodeForConstructWithArityCheck;
+#endif
+    };
+
+#if ENABLE(JIT)
+    class NativeExecutable : public ExecutableBase {
+        friend class JIT;
+    public:
+        static PassRefPtr<NativeExecutable> create(MacroAssemblerCodePtr callThunk, NativeFunction function, MacroAssemblerCodePtr constructThunk, NativeFunction constructor)
+        {
+            if (!callThunk)
+                return adoptRef(new NativeExecutable(JITCode(), function, JITCode(), constructor));
+            return adoptRef(new NativeExecutable(JITCode::HostFunction(callThunk), function, JITCode::HostFunction(constructThunk), constructor));
+        }
+
+        ~NativeExecutable();
+
+        NativeFunction function() { return m_function; }
+
+    private:
+        NativeExecutable(JITCode callThunk, NativeFunction function, JITCode constructThunk, NativeFunction constructor)
+            : ExecutableBase(NUM_PARAMETERS_IS_HOST)
+            , m_function(function)
+            , m_constructor(constructor)
+        {
+            m_jitCodeForCall = callThunk;
+            m_jitCodeForConstruct = constructThunk;
+            m_jitCodeForCallWithArityCheck = callThunk.addressForCall();
+            m_jitCodeForConstructWithArityCheck = constructThunk.addressForCall();
+        }
+
+        NativeFunction m_function;
+        // Probably should be a NativeConstructor, but this will currently require rewriting the JIT
+        // trampoline. It may be easier to make NativeFunction be passed 'this' as a part of the ArgList.
+        NativeFunction m_constructor;
+    };
+#endif
+
+    class VPtrHackExecutable : public ExecutableBase {
+    public:
+        VPtrHackExecutable()
+            : ExecutableBase(NUM_PARAMETERS_IS_HOST)
+        {
+        }
+
+        ~VPtrHackExecutable();
+    };
+
+    class ScriptExecutable : public ExecutableBase {
+    public:
+        ScriptExecutable(JSGlobalData* globalData, const SourceCode& source, bool isInStrictContext)
+            : ExecutableBase(NUM_PARAMETERS_NOT_COMPILED)
+            , m_source(source)
+            , m_features(isInStrictContext ? StrictModeFeature : 0)
+        {
+#if ENABLE(CODEBLOCK_SAMPLING)
+            relaxAdoptionRequirement();
+            if (SamplingTool* sampler = globalData->interpreter->sampler())
+                sampler->notifyOfScope(this);
+#else
+            UNUSED_PARAM(globalData);
+#endif
+        }
+
+        ScriptExecutable(ExecState* exec, const SourceCode& source, bool isInStrictContext)
+            : ExecutableBase(NUM_PARAMETERS_NOT_COMPILED)
+            , m_source(source)
+            , m_features(isInStrictContext ? StrictModeFeature : 0)
+        {
+#if ENABLE(CODEBLOCK_SAMPLING)
+            relaxAdoptionRequirement();
+            if (SamplingTool* sampler = exec->globalData().interpreter->sampler())
+                sampler->notifyOfScope(this);
+#else
+            UNUSED_PARAM(exec);
+#endif
+        }
+
+        const SourceCode& source() { return m_source; }
+        intptr_t sourceID() const { return m_source.provider()->asID(); }
+        const UString& sourceURL() const { return m_source.provider()->url(); }
+        int lineNo() const { return m_firstLine; }
+        int lastLine() const { return m_lastLine; }
+
+        bool usesEval() const { return m_features & EvalFeature; }
+        bool usesArguments() const { return m_features & ArgumentsFeature; }
+        bool needsActivation() const { return m_hasCapturedVariables || m_features & (EvalFeature | WithFeature | CatchFeature); }
+        bool isStrictMode() const { return m_features & StrictModeFeature; }
+
+    protected:
+        void recordParse(CodeFeatures features, bool hasCapturedVariables, int firstLine, int lastLine)
+        {
+            m_features = features;
+            m_hasCapturedVariables = hasCapturedVariables;
+            m_firstLine = firstLine;
+            m_lastLine = lastLine;
+        }
+
+        SourceCode m_source;
+        CodeFeatures m_features;
+        bool m_hasCapturedVariables;
+        int m_firstLine;
+        int m_lastLine;
+    };
+
+    class EvalExecutable : public ScriptExecutable {
+    public:
+
+        ~EvalExecutable();
+
+        JSObject* compile(ExecState* exec, ScopeChainNode* scopeChainNode)
+        {
+            JSObject* error = 0;
+            if (!m_evalCodeBlock)
+                error = compileInternal(exec, scopeChainNode);
+            ASSERT(!error == !!m_evalCodeBlock);
+            return error;
+        }
+
+        EvalCodeBlock& generatedBytecode()
+        {
+            ASSERT(m_evalCodeBlock);
+            return *m_evalCodeBlock;
+        }
+
+        static PassRefPtr<EvalExecutable> create(ExecState* exec, const SourceCode& source, bool isInStrictContext) { return adoptRef(new EvalExecutable(exec, source, isInStrictContext)); }
+
+#if ENABLE(JIT)
+        JITCode& generatedJITCode()
+        {
+            return generatedJITCodeForCall();
+        }
+#endif
+
+    private:
+        EvalExecutable(ExecState*, const SourceCode&, bool);
+
+        JSObject* compileInternal(ExecState*, ScopeChainNode*);
+
+        OwnPtr<EvalCodeBlock> m_evalCodeBlock;
+    };
+
+    class ProgramExecutable : public ScriptExecutable {
+    public:
+        static PassRefPtr<ProgramExecutable> create(ExecState* exec, const SourceCode& source)
+        {
+            return adoptRef(new ProgramExecutable(exec, source));
+        }
+
+        ~ProgramExecutable();
+
+        JSObject* compile(ExecState* exec, ScopeChainNode* scopeChainNode)
+        {
+            JSObject* error = 0;
+            if (!m_programCodeBlock)
+                error = compileInternal(exec, scopeChainNode);
+            ASSERT(!error == !!m_programCodeBlock);
+            return error;
+        }
+
+        ProgramCodeBlock& generatedBytecode()
+        {
+            ASSERT(m_programCodeBlock);
+            return *m_programCodeBlock;
+        }
+
+        JSObject* checkSyntax(ExecState*);
+
+#if ENABLE(JIT)
+        JITCode& generatedJITCode()
+        {
+            return generatedJITCodeForCall();
+        }
+#endif
+
+    private:
+        ProgramExecutable(ExecState*, const SourceCode&);
+
+        JSObject* compileInternal(ExecState*, ScopeChainNode*);
+
+        OwnPtr<ProgramCodeBlock> m_programCodeBlock;
+    };
+
+    class FunctionExecutable : public ScriptExecutable {
+        friend class JIT;
+    public:
+        static PassRefPtr<FunctionExecutable> create(ExecState* exec, const Identifier& name, const SourceCode& source, bool forceUsesArguments, FunctionParameters* parameters, bool isInStrictContext, int firstLine, int lastLine)
+        {
+            return adoptRef(new FunctionExecutable(exec, name, source, forceUsesArguments, parameters, isInStrictContext, firstLine, lastLine));
+        }
+
+        static PassRefPtr<FunctionExecutable> create(JSGlobalData* globalData, const Identifier& name, const SourceCode& source, bool forceUsesArguments, FunctionParameters* parameters, bool isInStrictContext, int firstLine, int lastLine)
+        {
+            return adoptRef(new FunctionExecutable(globalData, name, source, forceUsesArguments, parameters, isInStrictContext, firstLine, lastLine));
+        }
+
+        ~FunctionExecutable();
+
+        JSFunction* make(ExecState* exec, ScopeChainNode* scopeChain)
+        {
+            return new (exec) JSFunction(exec, this, scopeChain);
+        }
+        
+        // Returns either call or construct bytecode. This can be appropriate
+        // for answering questions that that don't vary between call and construct --
+        // for example, argumentsRegister().
+        FunctionCodeBlock& generatedBytecode()
+        {
+            if (m_codeBlockForCall)
+                return *m_codeBlockForCall;
+            ASSERT(m_codeBlockForConstruct);
+            return *m_codeBlockForConstruct;
+        }
+
+        JSObject* compileForCall(ExecState* exec, ScopeChainNode* scopeChainNode)
+        {
+            JSObject* error = 0;
+            if (!m_codeBlockForCall)
+                error = compileForCallInternal(exec, scopeChainNode);
+            ASSERT(!error == !!m_codeBlockForCall);
+            return error;
+        }
+
+        bool isGeneratedForCall() const
+        {
+            return m_codeBlockForCall;
+        }
+
+        FunctionCodeBlock& generatedBytecodeForCall()
+        {
+            ASSERT(m_codeBlockForCall);
+            return *m_codeBlockForCall;
+        }
+
+        JSObject* compileForConstruct(ExecState* exec, ScopeChainNode* scopeChainNode)
+        {
+            JSObject* error = 0;
+            if (!m_codeBlockForConstruct)
+                error = compileForConstructInternal(exec, scopeChainNode);
+            ASSERT(!error == !!m_codeBlockForConstruct);
+            return error;
+        }
+
+        bool isGeneratedForConstruct() const
+        {
+            return m_codeBlockForConstruct;
+        }
+
+        FunctionCodeBlock& generatedBytecodeForConstruct()
+        {
+            ASSERT(m_codeBlockForConstruct);
+            return *m_codeBlockForConstruct;
+        }
+
+        const Identifier& name() { return m_name; }
+        size_t parameterCount() const { return m_parameters->size(); }
+        unsigned capturedVariableCount() const { return m_numCapturedVariables; }
+        UString paramString() const;
+        SharedSymbolTable* symbolTable() const { return m_symbolTable; }
+
+        void discardCode();
+        void markAggregate(MarkStack&);
+        static PassRefPtr<FunctionExecutable> fromGlobalCode(const Identifier&, ExecState*, Debugger*, const SourceCode&, JSObject** exception);
+
+    private:
+        FunctionExecutable(JSGlobalData*, const Identifier& name, const SourceCode&, bool forceUsesArguments, FunctionParameters*, bool, int firstLine, int lastLine);
+        FunctionExecutable(ExecState*, const Identifier& name, const SourceCode&, bool forceUsesArguments, FunctionParameters*, bool, int firstLine, int lastLine);
+
+        JSObject* compileForCallInternal(ExecState*, ScopeChainNode*);
+        JSObject* compileForConstructInternal(ExecState*, ScopeChainNode*);
+
+        unsigned m_numCapturedVariables : 31;
+        bool m_forceUsesArguments : 1;
+
+        RefPtr<FunctionParameters> m_parameters;
+        OwnPtr<FunctionCodeBlock> m_codeBlockForCall;
+        OwnPtr<FunctionCodeBlock> m_codeBlockForConstruct;
+        Identifier m_name;
+        SharedSymbolTable* m_symbolTable;
+
+#if ENABLE(JIT)
+    public:
+        MacroAssemblerCodePtr generatedJITCodeForCallWithArityCheck()
+        {
+            ASSERT(m_jitCodeForCall);
+            ASSERT(m_jitCodeForCallWithArityCheck);
+            return m_jitCodeForCallWithArityCheck;
+        }
+
+        MacroAssemblerCodePtr generatedJITCodeForConstructWithArityCheck()
+        {
+            ASSERT(m_jitCodeForConstruct);
+            ASSERT(m_jitCodeForConstructWithArityCheck);
+            return m_jitCodeForConstructWithArityCheck;
+        }
+#endif
+    };
+
+    inline FunctionExecutable* JSFunction::jsExecutable() const
+    {
+        ASSERT(!isHostFunctionNonInline());
+        return static_cast<FunctionExecutable*>(m_executable.get());
+    }
+
+    inline bool JSFunction::isHostFunction() const
+    {
+        ASSERT(m_executable);
+        return m_executable->isHostFunction();
+    }
+
+#if ENABLE(JIT)
+    inline NativeFunction JSFunction::nativeFunction()
+    {
+        ASSERT(isHostFunction());
+        return static_cast<NativeExecutable*>(m_executable.get())->function();
+    }
+#endif
+}
+
+#endif