Merge 'wip/next' into dev

Change-Id: Iff9ee5e23bb326c4371ec8ed81d56f2f05d680e9

1 files changed, 190 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.h b/Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.h
new file mode 100644
index 000000000..8a614db21
--- /dev/null
+++ b/Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.h
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2012-2015 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 UnlinkedFunctionExecutable_h
+#define UnlinkedFunctionExecutable_h
+
+#include "BytecodeConventions.h"
+#include "CodeSpecializationKind.h"
+#include "CodeType.h"
+#include "ConstructAbility.h"
+#include "ExecutableInfo.h"
+#include "ExpressionRangeInfo.h"
+#include "HandlerInfo.h"
+#include "Identifier.h"
+#include "JSCell.h"
+#include "JSString.h"
+#include "ParserModes.h"
+#include "RegExp.h"
+#include "SpecialPointer.h"
+#include "VariableEnvironment.h"
+#include "VirtualRegister.h"
+#include <wtf/RefCountedArray.h>
+#include <wtf/Vector.h>
+
+namespace JSC {
+
+class FunctionMetadataNode;
+class FunctionExecutable;
+class ParserError;
+class SourceCode;
+class SourceProvider;
+class UnlinkedFunctionCodeBlock;
+
+enum UnlinkedFunctionKind {
+    UnlinkedNormalFunction,
+    UnlinkedBuiltinFunction,
+};
+
+class UnlinkedFunctionExecutable final : public JSCell {
+public:
+    friend class CodeCache;
+    friend class VM;
+
+    typedef JSCell Base;
+    static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
+
+    static UnlinkedFunctionExecutable* create(VM* vm, const SourceCode& source, FunctionMetadataNode* node, UnlinkedFunctionKind unlinkedFunctionKind, ConstructAbility constructAbility, VariableEnvironment& parentScopeTDZVariables, DerivedContextType derivedContextType, RefPtr<SourceProvider>&& sourceOverride = nullptr)
+    {
+        UnlinkedFunctionExecutable* instance = new (NotNull, allocateCell<UnlinkedFunctionExecutable>(vm->heap))
+            UnlinkedFunctionExecutable(vm, vm->unlinkedFunctionExecutableStructure.get(), source, WTFMove(sourceOverride), node, unlinkedFunctionKind, constructAbility, parentScopeTDZVariables, derivedContextType);
+        instance->finishCreation(*vm);
+        return instance;
+    }
+
+    const Identifier& name() const { return m_name; }
+    const Identifier& inferredName() const { return m_inferredName; }
+    JSString* nameValue() const { return m_nameValue.get(); }
+    void setNameValue(VM& vm, JSString* nameValue) { m_nameValue.set(vm, this, nameValue); }
+    unsigned parameterCount() const { return m_parameterCount; };
+    SourceParseMode parseMode() const { return static_cast<SourceParseMode>(m_sourceParseMode); };
+    bool isInStrictContext() const { return m_isInStrictContext; }
+    FunctionMode functionMode() const { return static_cast<FunctionMode>(m_functionMode); }
+    ConstructorKind constructorKind() const { return static_cast<ConstructorKind>(m_constructorKind); }
+    SuperBinding superBinding() const { return static_cast<SuperBinding>(m_superBinding); }
+
+    unsigned unlinkedFunctionNameStart() const { return m_unlinkedFunctionNameStart; }
+    unsigned unlinkedBodyStartColumn() const { return m_unlinkedBodyStartColumn; }
+    unsigned unlinkedBodyEndColumn() const { return m_unlinkedBodyEndColumn; }
+    unsigned startOffset() const { return m_startOffset; }
+    unsigned sourceLength() { return m_sourceLength; }
+    unsigned parametersStartOffset() const { return m_parametersStartOffset; }
+    unsigned typeProfilingStartOffset() const { return m_typeProfilingStartOffset; }
+    unsigned typeProfilingEndOffset() const { return m_typeProfilingEndOffset; }
+    void setInvalidTypeProfilingOffsets();
+
+    UnlinkedFunctionCodeBlock* unlinkedCodeBlockFor(
+        VM&, const SourceCode&, CodeSpecializationKind, DebuggerMode, ProfilerMode, 
+        ParserError&, SourceParseMode);
+
+    static UnlinkedFunctionExecutable* fromGlobalCode(
+        const Identifier&, ExecState&, const SourceCode&, JSObject*& exception, 
+        int overrideLineNumber);
+
+    JS_EXPORT_PRIVATE FunctionExecutable* link(VM&, const SourceCode&, int overrideLineNumber = -1);
+
+    void clearCode()
+    {
+        m_unlinkedCodeBlockForCall.clear();
+        m_unlinkedCodeBlockForConstruct.clear();
+    }
+
+    void recordParse(CodeFeatures features, bool hasCapturedVariables)
+    {
+        m_features = features;
+        m_hasCapturedVariables = hasCapturedVariables;
+    }
+
+    CodeFeatures features() const { return m_features; }
+    bool hasCapturedVariables() const { return m_hasCapturedVariables; }
+
+    static const bool needsDestruction = true;
+    static void destroy(JSCell*);
+
+    bool isBuiltinFunction() const { return m_isBuiltinFunction; }
+    ConstructAbility constructAbility() const { return static_cast<ConstructAbility>(m_constructAbility); }
+    bool isClassConstructorFunction() const { return constructorKind() != ConstructorKind::None; }
+    const VariableEnvironment* parentScopeTDZVariables() const { return &m_parentScopeTDZVariables; }
+    
+    bool isArrowFunction() const { return parseMode() == SourceParseMode::ArrowFunctionMode; }
+
+    JSC::DerivedContextType derivedContextType() const {return static_cast<JSC::DerivedContextType>(m_derivedContextType); }
+    
+private:
+    UnlinkedFunctionExecutable(VM*, Structure*, const SourceCode&, RefPtr<SourceProvider>&& sourceOverride, FunctionMetadataNode*, UnlinkedFunctionKind, ConstructAbility, VariableEnvironment&,  JSC::DerivedContextType);
+
+    unsigned m_firstLineOffset;
+    unsigned m_lineCount;
+    unsigned m_unlinkedFunctionNameStart;
+    unsigned m_unlinkedBodyStartColumn;
+    unsigned m_unlinkedBodyEndColumn;
+    unsigned m_startOffset;
+    unsigned m_sourceLength;
+    unsigned m_parametersStartOffset;
+    unsigned m_typeProfilingStartOffset;
+    unsigned m_typeProfilingEndOffset;
+    unsigned m_parameterCount;
+    CodeFeatures m_features;
+    unsigned m_isInStrictContext : 1;
+    unsigned m_hasCapturedVariables : 1;
+    unsigned m_isBuiltinFunction : 1;
+    unsigned m_constructAbility: 1;
+    unsigned m_constructorKind : 2;
+    unsigned m_functionMode : 1; // FunctionMode
+    unsigned m_superBinding : 1;
+    unsigned m_derivedContextType: 2;
+    unsigned m_sourceParseMode : 4; // SourceParseMode
+
+    WriteBarrier<UnlinkedFunctionCodeBlock> m_unlinkedCodeBlockForCall;
+    WriteBarrier<UnlinkedFunctionCodeBlock> m_unlinkedCodeBlockForConstruct;
+
+    Identifier m_name;
+    Identifier m_inferredName;
+    WriteBarrier<JSString> m_nameValue;
+    RefPtr<SourceProvider> m_sourceOverride;
+
+    VariableEnvironment m_parentScopeTDZVariables;
+
+protected:
+    void finishCreation(VM& vm)
+    {
+        Base::finishCreation(vm);
+        m_nameValue.set(vm, this, jsString(&vm, name().string()));
+    }
+
+    static void visitChildren(JSCell*, SlotVisitor&);
+
+public:
+    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
+    {
+        return Structure::create(vm, globalObject, proto, TypeInfo(UnlinkedFunctionExecutableType, StructureFlags), info());
+    }
+
+    DECLARE_EXPORT_INFO;
+};
+
+} // namespace JSC
+
+#endif // UnlinkedFunctionExecutable_h