C# CppGenerationBuffer.Indent方法代码示例

        private String GetCodeForReadyToRunHeader(ReadyToRunHeaderNode headerNode, NodeFactory factory)
        {
            CppGenerationBuffer rtrHeader = new CppGenerationBuffer();
            rtrHeader.Append(GetCodeForObjectNode(headerNode, factory));
            rtrHeader.AppendLine();
            rtrHeader.Append("void* RtRHeaderWrapper() {");
            rtrHeader.Indent();
            rtrHeader.AppendLine();
            rtrHeader.Append("static struct {");
            rtrHeader.AppendLine();
            rtrHeader.Append("unsigned char leftPadding[8];");
            rtrHeader.AppendLine();
            rtrHeader.Append("void* rtrHeader;");
            rtrHeader.AppendLine();
            rtrHeader.Append("unsigned char rightPadding[8];");
            rtrHeader.AppendLine();
            rtrHeader.Append("} rtrHeaderWrapper = {");
            rtrHeader.Indent();
            rtrHeader.AppendLine();
            rtrHeader.Append("{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },");
            rtrHeader.AppendLine();
            rtrHeader.Append("(void*)");
            rtrHeader.Append(headerNode.GetMangledName());
            rtrHeader.Append("(),");
            rtrHeader.AppendLine();
            rtrHeader.Append("{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }");
            rtrHeader.AppendLine();
            rtrHeader.Append("};");
            rtrHeader.Exdent();
            rtrHeader.AppendLine();
            rtrHeader.Append("return (void *)&rtrHeaderWrapper;");
            rtrHeader.Exdent();
            rtrHeader.AppendLine();
            rtrHeader.Append("}");
            rtrHeader.AppendLine();

            return rtrHeader.ToString();
        }

        public void OutputCode(IEnumerable<DependencyNode> nodes, MethodDesc entrypoint, NodeFactory factory)
        {
            var sb = new CppGenerationBuffer();
            BuildMethodLists(nodes);

            ExpandTypes();

            Out.WriteLine("#include \"common.h\"");
            Out.WriteLine("#include \"CppCodeGen.h\"");
            Out.WriteLine();


            _statics = new CppGenerationBuffer();
            _statics.Indent();
            _gcStatics = new CppGenerationBuffer();
            _gcStatics.Indent();
            _threadStatics = new CppGenerationBuffer();
            _threadStatics.Indent();
            _gcThreadStatics = new CppGenerationBuffer();
            _gcThreadStatics.Indent();
            var methodImplementations = new CppGenerationBuffer();

            OutputNodes(nodes, entrypoint, factory, sb, methodImplementations);
            Out.Write(sb.ToString());
            sb.Clear();

            Out.Write("struct {");
            Out.Write(_statics.ToString());
            Out.Write("} __statics;");

            Out.Write("struct {");
            Out.Write(_gcStatics.ToString());
            Out.Write("} __gcStatics;");

            Out.Write("struct {");
            Out.Write(_gcStatics.ToString());
            Out.Write("} __gcThreadStatics;");


            foreach (var externC in _externCSignatureMap)
            {
                string importName = externC.Key;
                // TODO: hacky special-case
                if (importName != "memmove" && importName != "malloc") // some methods are already declared by the CRT headers
                {
                    sb.AppendLine();
                    sb.Append(GetCppMethodDeclaration(null, false, importName, externC.Value));
                }
            }
            Out.Write(sb.ToString());
            sb.Clear();

            Out.Write(methodImplementations.ToString());
            methodImplementations.Clear();

            if (entrypoint != null)
            {
                // Stub for main method
                sb.AppendLine();
                if (_compilation.TypeSystemContext.Target.OperatingSystem == TargetOS.Windows)
                {
                    sb.Append("int wmain(int argc, wchar_t * argv[]) { ");
                }
                else
                {
                    sb.Append("int main(int argc, char * argv[]) {");
                }
                sb.Indent();

                sb.AppendLine();
                sb.Append("if (__initialize_runtime() != 0)");
                sb.Indent();
                sb.AppendLine();
                sb.Append("return -1;");
                sb.Exdent();
                sb.AppendEmptyLine();
                sb.AppendLine();
                sb.Append("ReversePInvokeFrame frame;");
                sb.AppendLine();
                sb.Append("__reverse_pinvoke(&frame);");

                sb.AppendEmptyLine();
                sb.AppendLine();
                sb.Append("int ret = ");
                sb.Append(GetCppMethodDeclarationName(entrypoint.OwningType, GetCppMethodName(entrypoint)));
                sb.Append("(argc, (intptr_t)argv);");

                sb.AppendEmptyLine();
                sb.AppendLine();
                sb.Append("__reverse_pinvoke_return(&frame);");
                sb.AppendLine();
                sb.Append("__shutdown_runtime();");

                sb.AppendLine();
                sb.Append("return ret;");
                sb.Exdent();
                sb.AppendLine();
                sb.Append("}");
            }
            Out.Write(sb.ToString());
//.........这里部分代码省略.........

        private void OutputTypeNode(IEETypeNode typeNode, NodeFactory factory, CppGenerationBuffer forwardDefinitions, CppGenerationBuffer typeDefinitions, CppGenerationBuffer methodTable)
        {
            if (_emittedTypes == null)
            {
                _emittedTypes = new HashSet<TypeDesc>();
            }
            TypeDesc nodeType = typeNode.Type;
            if (nodeType.IsPointer || nodeType.IsByRef || _emittedTypes.Contains(nodeType))
                return;

            _emittedTypes.Add(nodeType);


            // Create Namespaces
            string mangledName = GetCppTypeName(nodeType);

            int nesting = 0;
            int current = 0;

            forwardDefinitions.AppendLine();
            for (;;)
            {
                int sep = mangledName.IndexOf("::", current);

                if (sep < 0)
                    break;

                if (sep != 0)
                {
                    // Case of a name not starting with ::
                    forwardDefinitions.Append("namespace " + mangledName.Substring(current, sep - current) + " { ");
                    typeDefinitions.Append("namespace " + mangledName.Substring(current, sep - current) + " { ");
                    typeDefinitions.Indent();
                    nesting++;
                }
                current = sep + 2;
            }

            forwardDefinitions.Append("class " + mangledName.Substring(current) + ";");

            // type definition
            typeDefinitions.Append("class " + mangledName.Substring(current));
            if (!nodeType.IsValueType)
            {
                // Don't emit inheritance if base type has not been marked for emission
                if (nodeType.BaseType != null && _emittedTypes.Contains(nodeType.BaseType))
                {
                    typeDefinitions.Append(" : public " + GetCppTypeName(nodeType.BaseType));
                }
            }
            typeDefinitions.Append(" {");
            typeDefinitions.AppendLine();
            typeDefinitions.Append("public:");
            typeDefinitions.Indent();

            // TODO: Enable once the dependencies are tracked for arrays
            // if (((DependencyNode)_compilation.NodeFactory.ConstructedTypeSymbol(t)).Marked)
            if (!nodeType.IsPointer && !nodeType.IsByRef)
            {
                typeDefinitions.AppendLine();
                typeDefinitions.Append("static MethodTable * __getMethodTable();");
            }
            if (typeNode is ConstructedEETypeNode)
            {
                OutputTypeFields(typeDefinitions, nodeType);

                IReadOnlyList<MethodDesc> virtualSlots = _compilation.NodeFactory.VTable(nodeType).Slots;

                int baseSlots = 0;
                var baseType = nodeType.BaseType;
                while (baseType != null)
                {
                    IReadOnlyList<MethodDesc> baseVirtualSlots = _compilation.NodeFactory.VTable(baseType).Slots;
                    if (baseVirtualSlots != null)
                        baseSlots += baseVirtualSlots.Count;
                    baseType = baseType.BaseType;
                }

                for (int slot = 0; slot < virtualSlots.Count; slot++)
                {
                    MethodDesc virtualMethod = virtualSlots[slot];
                    typeDefinitions.AppendLine();
                    typeDefinitions.Append(GetCodeForVirtualMethod(virtualMethod, baseSlots + slot));
                }

                if (nodeType.IsDelegate)
                {
                    typeDefinitions.AppendLine();
                    typeDefinitions.Append(GetCodeForDelegate(nodeType));
                }


                if (nodeType.HasStaticConstructor)
                {
                    _statics.AppendLine();
                    _statics.Append("bool __cctor_" + GetCppTypeName(nodeType).Replace("::", "__") + ";");
                }

                List<MethodDesc> methodList;
                if (_methodLists.TryGetValue(nodeType, out methodList))
//.........这里部分代码省略.........

        private String GetCodeForObjectNode(ObjectNode node, NodeFactory factory)
        {
            // virtual slots
            var nodeData = node.GetData(factory, false);

            CppGenerationBuffer nodeCode = new CppGenerationBuffer();

            /* Create list of byte data. Used to divide contents between reloc and byte data
          * First val - isReloc
          * Second val - size of byte data if first value of tuple is false
          */

            List<NodeDataSection> nodeDataSections = new List<NodeDataSection>();
            byte[] actualData = new byte[nodeData.Data.Length];
            Relocation[] relocs = nodeData.Relocs;

            int nextRelocOffset = -1;
            int nextRelocIndex = -1;
            int lastByteIndex = 0;

            if (relocs.Length > 0)
            {
                nextRelocOffset = relocs[0].Offset;
                nextRelocIndex = 0;
            }

            int i = 0;
            int offset = 0;
            CppGenerationBuffer nodeDataDecl = new CppGenerationBuffer();

            if (node is ISymbolNode)
            {
                offset = (node as ISymbolNode).Offset;
                i = offset;
                lastByteIndex = offset;
            }
            while (i < nodeData.Data.Length)
            {
                if (i == nextRelocOffset)
                {
                    Relocation reloc = relocs[nextRelocIndex];

                    int size = _compilation.TypeSystemContext.Target.PointerSize;
                    // Make sure we've gotten the correct size for the reloc
                    System.Diagnostics.Debug.Assert(reloc.RelocType == (size == 8 ? RelocType.IMAGE_REL_BASED_DIR64 : RelocType.IMAGE_REL_BASED_HIGHLOW));

                    // Update nextRelocIndex/Offset
                    if (++nextRelocIndex < relocs.Length)
                    {
                        nextRelocOffset = relocs[nextRelocIndex].Offset;
                    }
                    nodeDataSections.Add(new NodeDataSection(NodeDataSectionType.Relocation, size));
                    i += size;
                    lastByteIndex = i;
                }
                else
                {
                    i++;
                    if (i + 1 == nextRelocOffset || i + 1 == nodeData.Data.Length)
                    {
                        nodeDataSections.Add(new NodeDataSection(NodeDataSectionType.ByteData, (i + 1) - lastByteIndex));
                    }
                }
            }
            string pointerType = node is EETypeNode ? "MethodTable * " : "void* ";
            nodeCode.Append(pointerType);
            if (node is EETypeNode)
            {
                nodeCode.Append(GetCppMethodDeclarationName((node as EETypeNode).Type, "__getMethodTable"));
            }
            else
            {
                string mangledName = ((ISymbolNode)node).GetMangledName();

                // Rename generic composition and optional fields nodes to avoid name clash with types
                bool shouldReplaceNamespaceQualifier = node is GenericCompositionNode || node is EETypeOptionalFieldsNode;
                nodeCode.Append(shouldReplaceNamespaceQualifier ? mangledName.Replace("::", "_") : mangledName);
            }
            nodeCode.Append("()");
            nodeCode.AppendLine();
            nodeCode.Append("{");
            nodeCode.Indent();
            nodeCode.AppendLine();
            nodeCode.Append("static struct {");

            nodeCode.AppendLine();
            nodeCode.Append(GetCodeForNodeStruct(nodeDataSections, node));

            nodeCode.AppendLine();
            nodeCode.Append("} mt = {");
            nodeCode.Append(GetCodeForNodeData(nodeDataSections, relocs, nodeData.Data, node, offset, factory));

            nodeCode.Append("};");
            nodeCode.AppendLine();
            nodeCode.Append("return ( ");
            nodeCode.Append(pointerType);
            nodeCode.Append(")&mt;");
            nodeCode.Exdent();
            nodeCode.AppendLine();
            nodeCode.Append("}");
//.........这里部分代码省略.........

        private String GetCodeForNodeStruct(List<NodeDataSection> nodeDataDivs, DependencyNode node)
        {
            CppGenerationBuffer nodeStructDecl = new CppGenerationBuffer();
            int relocCounter = 1;
            int i = 0;
            nodeStructDecl.Indent();

            for (i = 0; i < nodeDataDivs.Count; i++)
            {
                NodeDataSection section = nodeDataDivs[i];
                if (section.SectionType == NodeDataSectionType.Relocation)
                {
                    nodeStructDecl.Append("void* reloc");
                    nodeStructDecl.Append(relocCounter);
                    nodeStructDecl.Append(";");
                    relocCounter++;
                }
                else
                {
                    nodeStructDecl.Append("unsigned char data");
                    nodeStructDecl.Append((i + 1) - relocCounter);
                    nodeStructDecl.Append("[");
                    nodeStructDecl.Append(section.SectionSize);
                    nodeStructDecl.Append("];");
                }
                nodeStructDecl.AppendLine();
            }
            nodeStructDecl.Exdent();

            return nodeStructDecl.ToString();
        }

        public void CompileMethod(CppMethodCodeNode methodCodeNodeNeedingCode)
        {
            MethodDesc method = methodCodeNodeNeedingCode.Method;

            _compilation.Logger.Writer.WriteLine("Compiling " + method.ToString());
            if (method.HasCustomAttribute("System.Runtime", "RuntimeImportAttribute"))
            {
                CompileExternMethod(methodCodeNodeNeedingCode, ((EcmaMethod)method).GetRuntimeImportName());
                return;
            }

            if (method.IsRawPInvoke())
            {
                CompileExternMethod(methodCodeNodeNeedingCode, method.GetPInvokeMethodMetadata().Name ?? method.Name);
                return;
            }

            var methodIL = _compilation.GetMethodIL(method);
            if (methodIL == null)
                return;

            // TODO: Remove this code once CppCodegen is able to generate code for the reflection startup path.
            //       The startup path runs before any user code is executed.
            //       For now we replace the startup path with a simple "ret". Reflection won't work, but
            //       programs not using reflection will.
            if (method.Name == ".cctor")
            {
                MetadataType owningType = method.OwningType as MetadataType;
                if (owningType != null &&
                    owningType.Name == "ReflectionExecution" && owningType.Namespace == "Internal.Reflection.Execution")
                {
                    methodIL = new Internal.IL.Stubs.ILStubMethodIL(method, new byte[] { (byte)ILOpcode.ret }, Array.Empty<LocalVariableDefinition>(), null);
                }
            }

            try
            {
                // TODO: hacky special-case
                if (method.Name == "_ecvt_s")
                    throw new NotImplementedException();

                var ilImporter = new ILImporter(_compilation, this, method, methodIL);

                CompilerTypeSystemContext typeSystemContext = _compilation.TypeSystemContext;

                MethodDebugInformation debugInfo = _compilation.GetDebugInfo(methodIL);

                if (!_compilation.Options.HasOption(CppCodegenConfigProvider.NoLineNumbersString))
                {
                    IEnumerable<ILSequencePoint> sequencePoints = debugInfo.GetSequencePoints();
                    if (sequencePoints != null)
                        ilImporter.SetSequencePoints(sequencePoints);
                }

                IEnumerable<ILLocalVariable> localVariables = debugInfo.GetLocalVariables();
                if (localVariables != null)
                    ilImporter.SetLocalVariables(localVariables);

                IEnumerable<string> parameters = GetParameterNamesForMethod(method);
                if (parameters != null)
                    ilImporter.SetParameterNames(parameters);

                ilImporter.Compile(methodCodeNodeNeedingCode);
            }
            catch (Exception e)
            {
                _compilation.Logger.Writer.WriteLine(e.Message + " (" + method + ")");

                var sb = new CppGenerationBuffer();
                sb.AppendLine();
                AppendCppMethodDeclaration(sb, method, true);
                sb.AppendLine();
                sb.Append("{");
                sb.Indent();
                sb.AppendLine();
                sb.Append("throw 0xC000C000;");
                sb.Exdent();
                sb.AppendLine();
                sb.Append("}");

                methodCodeNodeNeedingCode.SetCode(sb.ToString(), Array.Empty<Object>());
            }
        }

        private String GetCodeForDelegate(TypeDesc delegateType)
        {
            var sb = new CppGenerationBuffer();

            MethodDesc method = delegateType.GetKnownMethod("Invoke", null);

            AppendSlotTypeDef(sb, method);

            sb.AppendLine();
            sb.Append("static __slot__");
            sb.Append(GetCppMethodName(method));
            sb.Append(" __invoke__");
            sb.Append(GetCppMethodName(method));
            sb.Append("(void * pThis)");
            sb.AppendLine();
            sb.Append("{");
            sb.Indent();
            sb.AppendLine();
            sb.Append("return (__slot__");
            sb.Append(GetCppMethodName(method));
            sb.Append(")(((");
            sb.Append(GetCppSignatureTypeName(_compilation.TypeSystemContext.GetWellKnownType(WellKnownType.MulticastDelegate)));
            sb.Append(")pThis)->m_functionPointer);");
            sb.Exdent();
            sb.AppendLine();
            sb.Append("};");

            return sb.ToString();
        }

        public void CompileMethod(CppMethodCodeNode methodCodeNodeNeedingCode)
        {
            MethodDesc method = methodCodeNodeNeedingCode.Method;

            _compilation.Log.WriteLine("Compiling " + method.ToString());

            SpecialMethodKind kind = method.DetectSpecialMethodKind();

            if (kind != SpecialMethodKind.Unknown)
            {
                string specialMethodCode = CompileSpecialMethod(method, kind);

                methodCodeNodeNeedingCode.SetCode(specialMethodCode, Array.Empty<Object>());
                return;
            }

            var methodIL = _compilation.GetMethodIL(method);
            if (methodIL == null)
                return;

            try
            {
                var ilImporter = new ILImporter(_compilation, this, method, methodIL);

                CompilerTypeSystemContext typeSystemContext = _compilation.TypeSystemContext;

                if (!_compilation.Options.NoLineNumbers)
                {
                    IEnumerable<ILSequencePoint> sequencePoints = typeSystemContext.GetSequencePointsForMethod(method);
                    if (sequencePoints != null)
                        ilImporter.SetSequencePoints(sequencePoints);
                }

                IEnumerable<ILLocalVariable> localVariables = typeSystemContext.GetLocalVariableNamesForMethod(method);
                if (localVariables != null)
                    ilImporter.SetLocalVariables(localVariables);

                IEnumerable<string> parameters = typeSystemContext.GetParameterNamesForMethod(method);
                if (parameters != null)
                    ilImporter.SetParameterNames(parameters);

                ilImporter.Compile(methodCodeNodeNeedingCode);
            }
            catch (Exception e)
            {
                _compilation.Log.WriteLine(e.Message + " (" + method + ")");

                var builder = new CppGenerationBuffer();
                builder.AppendLine();
                builder.Append(GetCppMethodDeclaration(method, true));
                builder.AppendLine();
                builder.Append("{");
                builder.Indent();
                builder.AppendLine();
                builder.Append("throw 0xC000C000;");
                builder.Exdent();
                builder.AppendLine();
                builder.Append("}");

                methodCodeNodeNeedingCode.SetCode(builder.ToString(), Array.Empty<Object>());
            }
        }

        public void OutputCode(IEnumerable<DependencyNode> nodes, MethodDesc entrypoint)
        {
            BuildMethodLists(nodes);

            ExpandTypes();

            Out.WriteLine("#include \"common.h\"");
            Out.WriteLine("#include \"CppCodeGen.h\"");
            Out.WriteLine();

            Out.Write("/* Forward type definitions */");
            OutputTypes(false);
            Out.WriteLine();
            Out.WriteLine();
            Out.Write("/* Type definitions  */");
            OutputTypes(true);

            var sb = new CppGenerationBuffer();

            foreach (var externC in _externCSignatureMap)
            {
                string importName = externC.Key;
                // TODO: hacky special-case
                if (importName != "memmove" && importName != "malloc") // some methods are already declared by the CRT headers
                {
                    sb.AppendLine();
                    sb.Append(GetCppMethodDeclaration(null, false, importName, externC.Value));
                }
            }
            Out.Write(sb.ToString());
            sb.Clear();

            foreach (var t in _cppSignatureNames.Keys)
            {
                // TODO: Enable once the dependencies are tracked for arrays
                // if (((DependencyNode)_compilation.NodeFactory.ConstructedTypeSymbol(t)).Marked)
                if (!t.IsPointer && !t.IsByRef)
                {
                    sb.AppendLine();
                    sb.Append(GetCodeForType(t));
                }

                List<MethodDesc> methodList;
                if (_methodLists.TryGetValue(t, out methodList))
                {
                    foreach (var m in methodList)
                    {
                        var methodCodeNode = (CppMethodCodeNode)_compilation.NodeFactory.MethodEntrypoint(m);
                        sb.AppendLine();
                        sb.Append(methodCodeNode.CppCode);

                        var alternateName = _compilation.NodeFactory.GetSymbolAlternateName(methodCodeNode);
                        if (alternateName != null)
                        {
                            sb.AppendLine();
                            sb.Append(GetCppMethodDeclaration(m, true, alternateName));
                            sb.AppendLine();
                            sb.Append("{");
                            sb.Indent();
                            sb.AppendLine();
                            if (!m.Signature.ReturnType.IsVoid)
                            {
                                sb.Append("return ");
                            }
                            sb.Append(GetCppMethodDeclarationName(m.OwningType, GetCppMethodName(m)));
                            sb.Append("(");
                            sb.Append(GetCppMethodCallParamList(m));
                            sb.Append(");");
                            sb.Exdent();
                            sb.AppendLine();
                            sb.Append("}");
                        }
                    }
                }
            }
            Out.Write(sb.ToString());
            sb.Clear();

            if (entrypoint != null)
            {
                // Stub for main method
                sb.AppendLine();
                if (_compilation.TypeSystemContext.Target.OperatingSystem == TargetOS.Windows)
                {
                    sb.Append("int wmain(int argc, wchar_t * argv[]) { ");
                }
                else
                {
                    sb.Append("int main(int argc, char * argv[]) {");
                }
                sb.Indent();

                sb.AppendLine();
                sb.Append("if (__initialize_runtime() != 0)");
                sb.Indent();
                sb.AppendLine();
                sb.Append("return -1;");
                sb.Exdent();
                sb.AppendEmptyLine();
                sb.AppendLine();
//.........这里部分代码省略.........

        private void OutputTypes(bool full)
        {
            var sb = new CppGenerationBuffer();
            if (full)
            {
                _statics = new CppGenerationBuffer();
                _statics.Indent();
                _gcStatics = new CppGenerationBuffer();
                _gcStatics.Indent();
                _threadStatics = new CppGenerationBuffer();
                _threadStatics.Indent();
                _gcThreadStatics = new CppGenerationBuffer();
                _gcThreadStatics.Indent();
            }

            _emittedTypes = new HashSet<TypeDesc>();
            foreach (var t in _cppSignatureNames.Keys)
            {
                if (t.IsByRef || t.IsPointer)
                    continue;

                // Base class types and valuetype instantance field types may be emitted out-of-order to make them 
                // appear before they are used.
                if (_emittedTypes.Contains(t))
                    continue;

                OutputType(sb, t, full);
            }
            _emittedTypes = null;

            if (full)
            {
                sb.AppendLine();
                sb.Append("struct {");
                // No need to indent or add a new line as _statics is already properly indented
                sb.Append(_statics.ToString());
                sb.AppendLine();
                sb.Append("} __statics;");

                // TODO: Register GC statics with GC
                sb.AppendLine();
                sb.Append("struct {");
                // No need to indent or add a new line as _gcStatics is already properly indented
                sb.Append(_gcStatics.ToString());
                sb.AppendLine();
                sb.Append("} __gcStatics;");

                sb.AppendLine();
                // @TODO_SDM: do for real - note: the 'extra' series are just testing the init syntax for 0-length arrays, they should be removed
                // TODO: preinitialized 0-length arrays are not supported in CLang
                sb.Append("#ifdef _MSC_VER");
                sb.AppendLine();
                sb.Append("StaticGcDesc __gcStaticsDescs = { 1, { { sizeof(__gcStatics), 0 }, { 123, 456 }, { 789, 101112 } } };");
                sb.AppendLine();
                sb.Append("#else");
                sb.AppendLine();
                sb.Append("StaticGcDesc __gcStaticsDescs;");
                sb.AppendLine();
                sb.Append("#endif");

                sb.AppendLine();
                sb.Append("SimpleModuleHeader __module = { &__gcStatics, &__gcStaticsDescs };");


                _statics = null;
                _gcStatics = null;
                _threadStatics = null;
                _gcThreadStatics = null;
            }

            Out.Write(sb.ToString());
            sb.Clear();
        }

        private string CompileSpecialMethod(MethodDesc method, SpecialMethodKind kind)
        {
            var builder = new CppGenerationBuffer();
            switch (kind)
            {
                case SpecialMethodKind.PInvoke:
                case SpecialMethodKind.RuntimeImport:
                    {
                        EcmaMethod ecmaMethod = method as EcmaMethod;

                        string importName = kind == SpecialMethodKind.PInvoke ?
                            method.GetPInvokeMethodMetadata().Name : ecmaMethod.GetAttributeStringValue("System.Runtime", "RuntimeImportAttribute");

                        if (importName == null)
                            importName = method.Name;

                        MethodSignature methodSignature = method.Signature;
                        bool slotCastRequired = false;

                        MethodSignature externCSignature;
                        if (_externCSignatureMap.TryGetValue(importName, out externCSignature))
                        {
                            slotCastRequired = !externCSignature.Equals(method.Signature);
                        }
                        else
                        {
                            _externCSignatureMap.Add(importName, methodSignature);
                            externCSignature = methodSignature;
                        }

                        builder.AppendLine();
                        builder.Append(GetCppMethodDeclaration(method, true));
                        builder.AppendLine();
                        builder.Append("{");
                        builder.Indent();

                        if (slotCastRequired)
                        {
                            AppendSlotTypeDef(builder, method);
                        }

                        builder.AppendLine();
                        if (!method.Signature.ReturnType.IsVoid)
                        {
                            builder.Append("return ");
                        }

                        if (slotCastRequired)
                            builder.Append("((__slot__" + GetCppMethodName(method) + ")");
                        builder.Append("::");
                        builder.Append(importName);
                        if (slotCastRequired)
                            builder.Append(")");

                        builder.Append("(");
                        builder.Append(GetCppMethodCallParamList(method));
                        builder.Append(");");
                        builder.Exdent();
                        builder.AppendLine();
                        builder.Append("}");

                        return builder.ToString();
                    }

                default:
                    builder.AppendLine();
                    builder.Append(GetCppMethodDeclaration(method, true));
                    builder.AppendLine();
                    builder.Append("{");
                    builder.Indent();
                    builder.AppendLine();
                    builder.Append("throw 0xC000C000;");
                    builder.Exdent();
                    builder.AppendLine();
                    builder.Append("}");

                    return builder.ToString();
            }
        }

        private void OutputMainMethodStub(MethodDesc entrypoint)
        {
            var sb = new CppGenerationBuffer();

            sb.AppendLine();
            if (_compilation.TypeSystemContext.Target.OperatingSystem == TargetOS.Windows)
            {
                sb.Append("int wmain(int argc, wchar_t * argv[]) { ");
            }
            else
            {
                sb.Append("int main(int argc, char * argv[]) {");
            }
            sb.Indent();

            sb.AppendLine();
            sb.Append("if (__initialize_runtime() != 0)");
            sb.Indent();
            sb.AppendLine();
            sb.Append("return -1;");
            sb.Exdent();
            sb.AppendEmptyLine();
            sb.AppendLine();
            sb.Append("ReversePInvokeFrame frame;");
            sb.AppendLine();
            sb.Append("__reverse_pinvoke(&frame);");

            sb.AppendEmptyLine();
            sb.AppendLine();
            sb.Append("::System_Private_CoreLib::Internal::Runtime::CompilerHelpers::StartupCodeHelpers::InitializeModules((intptr_t)RtRHeaderWrapper(), 2);");
            sb.AppendLine();
            sb.Append("int ret = ");
            sb.Append(GetCppMethodDeclarationName(entrypoint.OwningType, GetCppMethodName(entrypoint)));
            sb.Append("(argc, (intptr_t)argv);");

            sb.AppendEmptyLine();
            sb.AppendLine();
            sb.Append("__reverse_pinvoke_return(&frame);");
            sb.AppendLine();
            sb.Append("__shutdown_runtime();");

            sb.AppendLine();
            sb.Append("return ret;");
            sb.Exdent();
            sb.AppendLine();
            sb.Append("}");

            Out.Write(sb.ToString());
        }

        public void OutputCode(IEnumerable<DependencyNode> nodes, NodeFactory factory)
        {
            BuildMethodLists(nodes);

            Out.WriteLine("#include \"common.h\"");
            Out.WriteLine("#include \"CppCodeGen.h\"");
            Out.WriteLine();

            _statics = new CppGenerationBuffer();
            _statics.Indent();
            _gcStatics = new CppGenerationBuffer();
            _gcStatics.Indent();
            _threadStatics = new CppGenerationBuffer();
            _threadStatics.Indent();
            _gcThreadStatics = new CppGenerationBuffer();
            _gcThreadStatics.Indent();

            OutputNodes(nodes, factory);

            Out.Write("struct {");
            Out.Write(_statics.ToString());
            Out.Write("} __statics;");

            Out.Write("struct {");
            Out.Write(_gcStatics.ToString());
            Out.Write("} __gcStatics;");

            Out.Write("struct {");
            Out.Write(_gcStatics.ToString());
            Out.Write("} __gcThreadStatics;");

            OutputExternCSignatures();

            foreach (var node in nodes)
            {
                if (node is CppMethodCodeNode)
                    OutputMethodNode(node as CppMethodCodeNode);
            }

            // Try to locate the entrypoint method
            MethodDesc entrypoint = null;
            foreach (var alias in factory.NodeAliases)
                if (alias.Value == MainMethodRootProvider.ManagedEntryPointMethodName)
                    entrypoint = ((IMethodNode)alias.Key).Method;

            if (entrypoint != null)
            {
                OutputMainMethodStub(entrypoint);
            }

            Out.Dispose();
        }

        private String GetCodeForNodeData(List<NodeDataSection> nodeDataSections, Relocation[] relocs, byte[] byteData, DependencyNode node, int offset)
        {
            CppGenerationBuffer nodeDataDecl = new CppGenerationBuffer();
            int relocCounter = 0;
            int divisionStartIndex = offset;
            nodeDataDecl.Indent();
            nodeDataDecl.AppendLine();

            for (int i = 0; i < nodeDataSections.Count; i++)
            {
                nodeDataDecl.Indent();

                if (nodeDataSections[i].SectionType == NodeDataSectionType.Relocation)
                {
                    Relocation reloc = relocs[relocCounter];
                    if (reloc.Target is CppMethodCodeNode)
                    {
                        var method = reloc.Target as CppMethodCodeNode;

                        nodeDataDecl.Append("(void*)&");
                        nodeDataDecl.Append(GetCppMethodDeclarationName(method.Method.OwningType, GetCppMethodName(method.Method)));
                        nodeDataDecl.Append(",");
                    }
                    else if (reloc.Target is EETypeNode && node is EETypeNode && _emittedTypes.Contains((reloc.Target as EETypeNode).Type))
                    {
                        nodeDataDecl.Append(GetCppMethodDeclarationName((reloc.Target as EETypeNode).Type, "__getMethodTable"));
                        nodeDataDecl.Append("(),");
                    }
                    else
                    {
                        // TODO Add support for other relocs
                        nodeDataDecl.Append("NULL,");
                    }
                    relocCounter++;
                }
                else
                {
                    AppendFormattedByteArray(nodeDataDecl, byteData, divisionStartIndex, divisionStartIndex + nodeDataSections[i].SectionSize);
                    nodeDataDecl.Append(",");
                }
                divisionStartIndex += nodeDataSections[i].SectionSize;
                nodeDataDecl.AppendLine();
                nodeDataDecl.Exdent();
            }
            return nodeDataDecl.ToString();
        }

        public void OutputCode(IEnumerable<DependencyNode> nodes, NodeFactory factory)
        {
            BuildMethodLists(nodes);

            Out.WriteLine("#include \"common.h\"");
            Out.WriteLine("#include \"CppCodeGen.h\"");
            Out.WriteLine();

            _statics = new CppGenerationBuffer();
            _statics.Indent();
            _gcStatics = new CppGenerationBuffer();
            _gcStatics.Indent();
            _threadStatics = new CppGenerationBuffer();
            _threadStatics.Indent();
            _gcThreadStatics = new CppGenerationBuffer();
            _gcThreadStatics.Indent();

            OutputNodes(nodes, factory);

            Out.Write("struct {");
            Out.Write(_statics.ToString());
            Out.Write("} __statics;");

            Out.Write("struct {");
            Out.Write(_gcStatics.ToString());
            Out.Write("} __gcStatics;");

            Out.Write("struct {");
            Out.Write(_gcStatics.ToString());
            Out.Write("} __gcThreadStatics;");

            OutputExternCSignatures();

            foreach (var node in nodes)
            {
                if (node is CppMethodCodeNode)
                    OutputMethodNode(node as CppMethodCodeNode);
            }

            Out.Dispose();
        }