C# NodeFactory.TypeGenericDictionary方法代码示例

        protected override DependencyList ComputeNonRelocationBasedDependencies(NodeFactory factory)
        {
            DefType closestDefType = _type.GetClosestDefType();

            DependencyList dependencyList = new DependencyList();
            if (_type.RuntimeInterfaces.Length > 0)
            {
                dependencyList.Add(factory.InterfaceDispatchMap(_type), "Interface dispatch map");

                // If any of the implemented interfaces have variance, calls against compatible interface methods
                // could result in interface methods of this type being used (e.g. IEnumberable<object>.GetEnumerator()
                // can dispatch to an implementation of IEnumerable<string>.GetEnumerator()).
                // For now, we will not try to optimize this and we will pretend all interface methods are necessary.
                
                foreach (var implementedInterface in _type.RuntimeInterfaces)
                {
                    if (implementedInterface.HasVariance)
                    {
                        foreach (var interfaceMethod in implementedInterface.GetAllMethods())
                        {
                            if (interfaceMethod.Signature.IsStatic)
                                continue;

                            MethodDesc implMethod = closestDefType.ResolveInterfaceMethodToVirtualMethodOnType(interfaceMethod);
                            if (implMethod != null)
                            {
                                dependencyList.Add(factory.VirtualMethodUse(interfaceMethod), "Variant interface method");
                                dependencyList.Add(factory.VirtualMethodUse(implMethod), "Variant interface method");
                            }
                        }
                    }
                }
            }

            if (_type.IsArray)
            {
                // Array EEType depends on System.Array's virtuals. Array EETypes don't point to
                // their base type (i.e. there's no reloc based dependency making this "just work").
                dependencyList.Add(factory.ConstructedTypeSymbol(_type.BaseType), "Array base type");
            }

            dependencyList.Add(factory.VTable(_type), "VTable");

            if (closestDefType.HasGenericDictionarySlot())
            {
                // Generic dictionary pointer is part of the vtable and as such it gets only laid out
                // at the final data emission phase. We need to report it as a non-relocation dependency.
                dependencyList.Add(factory.TypeGenericDictionary(closestDefType), "Type generic dictionary");
            }

            // Include the optional fields by default. We don't know if optional fields will be needed until
            // all of the interface usage has been stabilized. If we end up not needing it, the EEType node will not
            // generate any relocs to it, and the optional fields node will instruct the object writer to skip
            // emitting it.
            dependencyList.Add(_optionalFieldsNode, "Optional fields");
            
            return dependencyList;
        }

        protected override void OutputVirtualSlots(NodeFactory factory, ref ObjectDataBuilder objData, TypeDesc implType, TypeDesc declType)
        {
            declType = declType.GetClosestDefType();

            var baseType = declType.BaseType;
            if (baseType != null)
                OutputVirtualSlots(factory, ref objData, implType, baseType);

            // The generic dictionary pointer occupies the first slot of each type vtable slice
            if (declType.HasGenericDictionarySlot())
            {
                objData.EmitPointerReloc(factory.TypeGenericDictionary(declType));
            }

            // Actual vtable slots follow
            IReadOnlyList<MethodDesc> virtualSlots = factory.VTable(declType).Slots;

            for (int i = 0; i < virtualSlots.Count; i++)
            {
                MethodDesc declMethod = virtualSlots[i];
                MethodDesc implMethod = implType.GetClosestDefType().FindVirtualFunctionTargetMethodOnObjectType(declMethod);

                if (declMethod.HasInstantiation)
                {
                    // Generic virtual methods will "compile", but will fail to link. Check for it here.
                    throw new NotImplementedException("VTable for " + _type + " has generic virtual methods.");
                }

                if (!implMethod.IsAbstract)
                {
                    MethodDesc canonImplMethod = implMethod.GetCanonMethodTarget(CanonicalFormKind.Specific);
                    objData.EmitPointerReloc(factory.MethodEntrypoint(canonImplMethod, implMethod.OwningType.IsValueType));
                }
                else
                {
                    objData.EmitZeroPointer();
                }
            }
        }