814 lines
24 KiB
C#
814 lines
24 KiB
C#
//
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// Author:
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// Jb Evain (jbevain@gmail.com)
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//
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// Copyright (c) 2008 - 2015 Jb Evain
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// Copyright (c) 2008 - 2011 Novell, Inc.
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//
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// Licensed under the MIT/X11 license.
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//
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using System;
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using System.Collections.Generic;
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using Mono.Collections.Generic;
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using SR = System.Reflection;
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using Mono.Cecil.Metadata;
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namespace Mono.Cecil {
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public interface IMetadataImporterProvider {
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IMetadataImporter GetMetadataImporter (ModuleDefinition module);
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}
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public interface IMetadataImporter {
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AssemblyNameReference ImportReference (AssemblyNameReference reference);
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TypeReference ImportReference (TypeReference type, IGenericParameterProvider context);
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FieldReference ImportReference (FieldReference field, IGenericParameterProvider context);
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MethodReference ImportReference (MethodReference method, IGenericParameterProvider context);
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}
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public interface IReflectionImporterProvider {
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IReflectionImporter GetReflectionImporter (ModuleDefinition module);
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}
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public interface IReflectionImporter {
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AssemblyNameReference ImportReference (SR.AssemblyName reference);
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TypeReference ImportReference (Type type, IGenericParameterProvider context);
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FieldReference ImportReference (SR.FieldInfo field, IGenericParameterProvider context);
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MethodReference ImportReference (SR.MethodBase method, IGenericParameterProvider context);
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}
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struct ImportGenericContext {
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Collection<IGenericParameterProvider> stack;
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public bool IsEmpty { get { return stack == null; } }
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public ImportGenericContext (IGenericParameterProvider provider)
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{
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if (provider == null)
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throw new ArgumentNullException ("provider");
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stack = null;
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Push (provider);
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}
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public void Push (IGenericParameterProvider provider)
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{
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if (stack == null)
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stack = new Collection<IGenericParameterProvider> (1) { provider };
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else
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stack.Add (provider);
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}
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public void Pop ()
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{
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stack.RemoveAt (stack.Count - 1);
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}
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public TypeReference MethodParameter (string method, int position)
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{
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for (int i = stack.Count - 1; i >= 0; i--) {
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var candidate = stack [i] as MethodReference;
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if (candidate == null)
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continue;
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if (method != NormalizeMethodName (candidate))
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continue;
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return candidate.GenericParameters [position];
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}
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throw new InvalidOperationException ();
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}
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public string NormalizeMethodName (MethodReference method)
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{
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return method.DeclaringType.GetElementType ().FullName + "." + method.Name;
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}
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public TypeReference TypeParameter (string type, int position)
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{
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for (int i = stack.Count - 1; i >= 0; i--) {
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var candidate = GenericTypeFor (stack [i]);
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if (candidate.FullName != type)
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continue;
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return candidate.GenericParameters [position];
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}
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throw new InvalidOperationException ();
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}
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static TypeReference GenericTypeFor (IGenericParameterProvider context)
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{
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var type = context as TypeReference;
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if (type != null)
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return type.GetElementType ();
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var method = context as MethodReference;
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if (method != null)
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return method.DeclaringType.GetElementType ();
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throw new InvalidOperationException ();
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}
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public static ImportGenericContext For (IGenericParameterProvider context)
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{
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return context != null ? new ImportGenericContext (context) : default (ImportGenericContext);
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}
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}
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public class DefaultReflectionImporter : IReflectionImporter {
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readonly protected ModuleDefinition module;
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public DefaultReflectionImporter (ModuleDefinition module)
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{
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Mixin.CheckModule (module);
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this.module = module;
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}
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enum ImportGenericKind {
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Definition,
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Open,
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}
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static readonly Dictionary<Type, ElementType> type_etype_mapping = new Dictionary<Type, ElementType> (18) {
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{ typeof (void), ElementType.Void },
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{ typeof (bool), ElementType.Boolean },
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{ typeof (char), ElementType.Char },
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{ typeof (sbyte), ElementType.I1 },
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{ typeof (byte), ElementType.U1 },
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{ typeof (short), ElementType.I2 },
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{ typeof (ushort), ElementType.U2 },
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{ typeof (int), ElementType.I4 },
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{ typeof (uint), ElementType.U4 },
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{ typeof (long), ElementType.I8 },
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{ typeof (ulong), ElementType.U8 },
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{ typeof (float), ElementType.R4 },
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{ typeof (double), ElementType.R8 },
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{ typeof (string), ElementType.String },
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{ typeof (TypedReference), ElementType.TypedByRef },
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{ typeof (IntPtr), ElementType.I },
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{ typeof (UIntPtr), ElementType.U },
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{ typeof (object), ElementType.Object },
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};
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TypeReference ImportType (Type type, ImportGenericContext context)
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{
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return ImportType (type, context, ImportGenericKind.Open);
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}
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TypeReference ImportType (Type type, ImportGenericContext context, ImportGenericKind import_kind)
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{
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if (IsTypeSpecification (type) || ImportOpenGenericType (type, import_kind))
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return ImportTypeSpecification (type, context);
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var reference = new TypeReference (
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string.Empty,
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type.Name,
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module,
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ImportScope (type),
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type.IsValueType);
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reference.etype = ImportElementType (type);
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if (IsNestedType (type))
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reference.DeclaringType = ImportType (type.DeclaringType, context, import_kind);
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else
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reference.Namespace = type.Namespace ?? string.Empty;
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if (type.IsGenericType)
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ImportGenericParameters (reference, type.GetGenericArguments ());
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return reference;
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}
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protected virtual IMetadataScope ImportScope (Type type)
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{
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return ImportScope (type.Assembly);
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}
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static bool ImportOpenGenericType (Type type, ImportGenericKind import_kind)
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{
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return type.IsGenericType && type.IsGenericTypeDefinition && import_kind == ImportGenericKind.Open;
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}
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static bool ImportOpenGenericMethod (SR.MethodBase method, ImportGenericKind import_kind)
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{
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return method.IsGenericMethod && method.IsGenericMethodDefinition && import_kind == ImportGenericKind.Open;
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}
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static bool IsNestedType (Type type)
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{
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return type.IsNested;
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}
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TypeReference ImportTypeSpecification (Type type, ImportGenericContext context)
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{
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if (type.IsByRef)
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return new ByReferenceType (ImportType (type.GetElementType (), context));
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if (type.IsPointer)
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return new PointerType (ImportType (type.GetElementType (), context));
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if (type.IsArray)
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return new ArrayType (ImportType (type.GetElementType (), context), type.GetArrayRank ());
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if (type.IsGenericType)
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return ImportGenericInstance (type, context);
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if (type.IsGenericParameter)
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return ImportGenericParameter (type, context);
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throw new NotSupportedException (type.FullName);
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}
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static TypeReference ImportGenericParameter (Type type, ImportGenericContext context)
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{
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if (context.IsEmpty)
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throw new InvalidOperationException ();
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if (type.DeclaringMethod != null)
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return context.MethodParameter (NormalizeMethodName (type.DeclaringMethod), type.GenericParameterPosition);
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if (type.DeclaringType != null)
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return context.TypeParameter (NormalizeTypeFullName (type.DeclaringType), type.GenericParameterPosition);
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throw new InvalidOperationException();
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}
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static string NormalizeMethodName (SR.MethodBase method)
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{
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return NormalizeTypeFullName (method.DeclaringType) + "." + method.Name;
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}
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static string NormalizeTypeFullName (Type type)
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{
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if (IsNestedType (type))
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return NormalizeTypeFullName (type.DeclaringType) + "/" + type.Name;
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return type.FullName;
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}
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TypeReference ImportGenericInstance (Type type, ImportGenericContext context)
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{
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var element_type = ImportType (type.GetGenericTypeDefinition (), context, ImportGenericKind.Definition);
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var instance = new GenericInstanceType (element_type);
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var arguments = type.GetGenericArguments ();
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var instance_arguments = instance.GenericArguments;
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context.Push (element_type);
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try {
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for (int i = 0; i < arguments.Length; i++)
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instance_arguments.Add (ImportType (arguments [i], context));
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return instance;
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} finally {
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context.Pop ();
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}
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}
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static bool IsTypeSpecification (Type type)
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{
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return type.HasElementType
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|| IsGenericInstance (type)
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|| type.IsGenericParameter;
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}
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static bool IsGenericInstance (Type type)
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{
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return type.IsGenericType && !type.IsGenericTypeDefinition;
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}
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static ElementType ImportElementType (Type type)
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{
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ElementType etype;
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if (!type_etype_mapping.TryGetValue (type, out etype))
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return ElementType.None;
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return etype;
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}
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protected AssemblyNameReference ImportScope (SR.Assembly assembly)
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{
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return ImportReference (assembly.GetName ());
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}
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public virtual AssemblyNameReference ImportReference (SR.AssemblyName name)
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{
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Mixin.CheckName (name);
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AssemblyNameReference reference;
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if (TryGetAssemblyNameReference (name, out reference))
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return reference;
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reference = new AssemblyNameReference (name.Name, name.Version)
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{
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PublicKeyToken = name.GetPublicKeyToken (),
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Culture = name.CultureInfo.Name,
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HashAlgorithm = (AssemblyHashAlgorithm) name.HashAlgorithm,
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};
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module.AssemblyReferences.Add (reference);
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return reference;
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}
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bool TryGetAssemblyNameReference (SR.AssemblyName name, out AssemblyNameReference assembly_reference)
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{
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var references = module.AssemblyReferences;
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for (int i = 0; i < references.Count; i++) {
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var reference = references [i];
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if (name.FullName != reference.FullName) // TODO compare field by field
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continue;
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assembly_reference = reference;
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return true;
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}
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assembly_reference = null;
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return false;
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}
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FieldReference ImportField (SR.FieldInfo field, ImportGenericContext context)
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{
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var declaring_type = ImportType (field.DeclaringType, context);
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if (IsGenericInstance (field.DeclaringType))
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field = ResolveFieldDefinition (field);
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context.Push (declaring_type);
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try {
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return new FieldReference {
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Name = field.Name,
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DeclaringType = declaring_type,
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FieldType = ImportType (field.FieldType, context),
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};
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} finally {
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context.Pop ();
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}
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}
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static SR.FieldInfo ResolveFieldDefinition (SR.FieldInfo field)
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{
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return field.Module.ResolveField (field.MetadataToken);
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}
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static SR.MethodBase ResolveMethodDefinition (SR.MethodBase method)
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{
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return method.Module.ResolveMethod (method.MetadataToken);
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}
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MethodReference ImportMethod (SR.MethodBase method, ImportGenericContext context, ImportGenericKind import_kind)
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{
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if (IsMethodSpecification (method) || ImportOpenGenericMethod (method, import_kind))
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return ImportMethodSpecification (method, context);
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var declaring_type = ImportType (method.DeclaringType, context);
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if (IsGenericInstance (method.DeclaringType))
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method = ResolveMethodDefinition (method);
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var reference = new MethodReference {
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Name = method.Name,
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HasThis = HasCallingConvention (method, SR.CallingConventions.HasThis),
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ExplicitThis = HasCallingConvention (method, SR.CallingConventions.ExplicitThis),
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DeclaringType = ImportType (method.DeclaringType, context, ImportGenericKind.Definition),
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};
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if (HasCallingConvention (method, SR.CallingConventions.VarArgs))
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reference.CallingConvention &= MethodCallingConvention.VarArg;
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if (method.IsGenericMethod)
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ImportGenericParameters (reference, method.GetGenericArguments ());
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context.Push (reference);
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try {
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var method_info = method as SR.MethodInfo;
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reference.ReturnType = method_info != null
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? ImportType (method_info.ReturnType, context)
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: ImportType (typeof (void), default (ImportGenericContext));
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var parameters = method.GetParameters ();
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var reference_parameters = reference.Parameters;
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for (int i = 0; i < parameters.Length; i++)
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reference_parameters.Add (
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new ParameterDefinition (ImportType (parameters [i].ParameterType, context)));
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reference.DeclaringType = declaring_type;
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return reference;
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} finally {
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context.Pop ();
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}
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}
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static void ImportGenericParameters (IGenericParameterProvider provider, Type [] arguments)
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{
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var provider_parameters = provider.GenericParameters;
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for (int i = 0; i < arguments.Length; i++)
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provider_parameters.Add (new GenericParameter (arguments [i].Name, provider));
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}
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static bool IsMethodSpecification (SR.MethodBase method)
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{
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return method.IsGenericMethod && !method.IsGenericMethodDefinition;
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}
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MethodReference ImportMethodSpecification (SR.MethodBase method, ImportGenericContext context)
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{
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var method_info = method as SR.MethodInfo;
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if (method_info == null)
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throw new InvalidOperationException ();
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var element_method = ImportMethod (method_info.GetGenericMethodDefinition (), context, ImportGenericKind.Definition);
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var instance = new GenericInstanceMethod (element_method);
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var arguments = method.GetGenericArguments ();
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var instance_arguments = instance.GenericArguments;
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context.Push (element_method);
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try {
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for (int i = 0; i < arguments.Length; i++)
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instance_arguments.Add (ImportType (arguments [i], context));
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return instance;
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} finally {
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context.Pop ();
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}
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}
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static bool HasCallingConvention (SR.MethodBase method, SR.CallingConventions conventions)
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{
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return (method.CallingConvention & conventions) != 0;
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}
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public virtual TypeReference ImportReference (Type type, IGenericParameterProvider context)
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{
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Mixin.CheckType (type);
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return ImportType (
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type,
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ImportGenericContext.For (context),
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context != null ? ImportGenericKind.Open : ImportGenericKind.Definition);
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}
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public virtual FieldReference ImportReference (SR.FieldInfo field, IGenericParameterProvider context)
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{
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Mixin.CheckField (field);
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return ImportField (field, ImportGenericContext.For (context));
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}
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public virtual MethodReference ImportReference (SR.MethodBase method, IGenericParameterProvider context)
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{
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Mixin.CheckMethod (method);
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return ImportMethod (method,
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ImportGenericContext.For (context),
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context != null ? ImportGenericKind.Open : ImportGenericKind.Definition);
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}
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}
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public class DefaultMetadataImporter : IMetadataImporter {
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readonly protected ModuleDefinition module;
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public DefaultMetadataImporter (ModuleDefinition module)
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{
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Mixin.CheckModule (module);
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this.module = module;
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}
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internal virtual TypeReference ImportType (TypeReference type, ImportGenericContext context)
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{
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if (type.IsTypeSpecification ())
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return ImportTypeSpecification (type, context);
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var reference = new TypeReference (
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type.Namespace,
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type.Name,
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module,
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ImportScope (type),
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type.IsValueType);
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MetadataSystem.TryProcessPrimitiveTypeReference (reference);
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if (type.IsNested)
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reference.DeclaringType = ImportType (type.DeclaringType, context);
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if (type.HasGenericParameters)
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ImportGenericParameters (reference, type);
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return reference;
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}
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protected virtual IMetadataScope ImportScope (TypeReference type)
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{
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return ImportScope (type.Scope);
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}
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protected IMetadataScope ImportScope (IMetadataScope scope)
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{
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switch (scope.MetadataScopeType) {
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case MetadataScopeType.AssemblyNameReference:
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return ImportReference ((AssemblyNameReference) scope);
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case MetadataScopeType.ModuleDefinition:
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if (scope == module) return scope;
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return ImportReference (((ModuleDefinition) scope).Assembly.Name);
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case MetadataScopeType.ModuleReference:
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throw new NotImplementedException ();
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}
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throw new NotSupportedException ();
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}
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public virtual AssemblyNameReference ImportReference (AssemblyNameReference name)
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{
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Mixin.CheckName (name);
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AssemblyNameReference reference;
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if (module.TryGetAssemblyNameReference (name, out reference))
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return reference;
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reference = new AssemblyNameReference (name.Name, name.Version) {
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Culture = name.Culture,
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HashAlgorithm = name.HashAlgorithm,
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IsRetargetable = name.IsRetargetable,
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IsWindowsRuntime = name.IsWindowsRuntime,
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};
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var pk_token = !name.PublicKeyToken.IsNullOrEmpty ()
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? new byte [name.PublicKeyToken.Length]
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: Empty<byte>.Array;
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if (pk_token.Length > 0)
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Buffer.BlockCopy (name.PublicKeyToken, 0, pk_token, 0, pk_token.Length);
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reference.PublicKeyToken = pk_token;
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module.AssemblyReferences.Add (reference);
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return reference;
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}
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static void ImportGenericParameters (IGenericParameterProvider imported, IGenericParameterProvider original)
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{
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var parameters = original.GenericParameters;
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var imported_parameters = imported.GenericParameters;
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for (int i = 0; i < parameters.Count; i++)
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imported_parameters.Add (new GenericParameter (parameters [i].Name, imported));
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}
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TypeReference ImportTypeSpecification (TypeReference type, ImportGenericContext context)
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{
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switch (type.etype) {
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case ElementType.SzArray:
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var vector = (ArrayType) type;
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return new ArrayType (ImportType (vector.ElementType, context));
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case ElementType.Ptr:
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var pointer = (PointerType) type;
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return new PointerType (ImportType (pointer.ElementType, context));
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case ElementType.ByRef:
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var byref = (ByReferenceType) type;
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return new ByReferenceType (ImportType (byref.ElementType, context));
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case ElementType.Pinned:
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var pinned = (PinnedType) type;
|
|
return new PinnedType (ImportType (pinned.ElementType, context));
|
|
case ElementType.Sentinel:
|
|
var sentinel = (SentinelType) type;
|
|
return new SentinelType (ImportType (sentinel.ElementType, context));
|
|
case ElementType.FnPtr:
|
|
var fnptr = (FunctionPointerType) type;
|
|
var imported_fnptr = new FunctionPointerType () {
|
|
HasThis = fnptr.HasThis,
|
|
ExplicitThis = fnptr.ExplicitThis,
|
|
CallingConvention = fnptr.CallingConvention,
|
|
ReturnType = ImportType (fnptr.ReturnType, context),
|
|
};
|
|
|
|
if (!fnptr.HasParameters)
|
|
return imported_fnptr;
|
|
|
|
for (int i = 0; i < fnptr.Parameters.Count; i++)
|
|
imported_fnptr.Parameters.Add (new ParameterDefinition (
|
|
ImportType (fnptr.Parameters [i].ParameterType, context)));
|
|
|
|
return imported_fnptr;
|
|
case ElementType.CModOpt:
|
|
var modopt = (OptionalModifierType) type;
|
|
return new OptionalModifierType (
|
|
ImportType (modopt.ModifierType, context),
|
|
ImportType (modopt.ElementType, context));
|
|
case ElementType.CModReqD:
|
|
var modreq = (RequiredModifierType) type;
|
|
return new RequiredModifierType (
|
|
ImportType (modreq.ModifierType, context),
|
|
ImportType (modreq.ElementType, context));
|
|
case ElementType.Array:
|
|
var array = (ArrayType) type;
|
|
var imported_array = new ArrayType (ImportType (array.ElementType, context));
|
|
if (array.IsVector)
|
|
return imported_array;
|
|
|
|
var dimensions = array.Dimensions;
|
|
var imported_dimensions = imported_array.Dimensions;
|
|
|
|
imported_dimensions.Clear ();
|
|
|
|
for (int i = 0; i < dimensions.Count; i++) {
|
|
var dimension = dimensions [i];
|
|
|
|
imported_dimensions.Add (new ArrayDimension (dimension.LowerBound, dimension.UpperBound));
|
|
}
|
|
|
|
return imported_array;
|
|
case ElementType.GenericInst:
|
|
var instance = (GenericInstanceType) type;
|
|
var element_type = ImportType (instance.ElementType, context);
|
|
var imported_instance = new GenericInstanceType (element_type);
|
|
|
|
var arguments = instance.GenericArguments;
|
|
var imported_arguments = imported_instance.GenericArguments;
|
|
|
|
for (int i = 0; i < arguments.Count; i++)
|
|
imported_arguments.Add (ImportType (arguments [i], context));
|
|
|
|
return imported_instance;
|
|
case ElementType.Var:
|
|
var var_parameter = (GenericParameter) type;
|
|
if (var_parameter.DeclaringType == null)
|
|
throw new InvalidOperationException ();
|
|
return context.TypeParameter (var_parameter.DeclaringType.FullName, var_parameter.Position);
|
|
case ElementType.MVar:
|
|
var mvar_parameter = (GenericParameter) type;
|
|
if (mvar_parameter.DeclaringMethod == null)
|
|
throw new InvalidOperationException ();
|
|
return context.MethodParameter (context.NormalizeMethodName (mvar_parameter.DeclaringMethod), mvar_parameter.Position);
|
|
}
|
|
|
|
throw new NotSupportedException (type.etype.ToString ());
|
|
}
|
|
|
|
FieldReference ImportField (FieldReference field, ImportGenericContext context)
|
|
{
|
|
var declaring_type = ImportType (field.DeclaringType, context);
|
|
|
|
context.Push (declaring_type);
|
|
try {
|
|
return new FieldReference {
|
|
Name = field.Name,
|
|
DeclaringType = declaring_type,
|
|
FieldType = ImportType (field.FieldType, context),
|
|
};
|
|
} finally {
|
|
context.Pop ();
|
|
}
|
|
}
|
|
|
|
MethodReference ImportMethod (MethodReference method, ImportGenericContext context)
|
|
{
|
|
if (method.IsGenericInstance)
|
|
return ImportMethodSpecification (method, context);
|
|
|
|
var declaring_type = ImportType (method.DeclaringType, context);
|
|
|
|
var reference = new MethodReference {
|
|
Name = method.Name,
|
|
HasThis = method.HasThis,
|
|
ExplicitThis = method.ExplicitThis,
|
|
DeclaringType = declaring_type,
|
|
CallingConvention = method.CallingConvention,
|
|
};
|
|
|
|
if (method.HasGenericParameters)
|
|
ImportGenericParameters (reference, method);
|
|
|
|
context.Push (reference);
|
|
try {
|
|
reference.ReturnType = ImportType (method.ReturnType, context);
|
|
|
|
if (!method.HasParameters)
|
|
return reference;
|
|
|
|
var parameters = method.Parameters;
|
|
var reference_parameters = reference.parameters = new ParameterDefinitionCollection (reference, parameters.Count);
|
|
for (int i = 0; i < parameters.Count; i++)
|
|
reference_parameters.Add (
|
|
new ParameterDefinition (ImportType (parameters [i].ParameterType, context)));
|
|
|
|
return reference;
|
|
} finally {
|
|
context.Pop();
|
|
}
|
|
}
|
|
|
|
MethodSpecification ImportMethodSpecification (MethodReference method, ImportGenericContext context)
|
|
{
|
|
if (!method.IsGenericInstance)
|
|
throw new NotSupportedException ();
|
|
|
|
var instance = (GenericInstanceMethod) method;
|
|
var element_method = ImportMethod (instance.ElementMethod, context);
|
|
var imported_instance = new GenericInstanceMethod (element_method);
|
|
|
|
var arguments = instance.GenericArguments;
|
|
var imported_arguments = imported_instance.GenericArguments;
|
|
|
|
for (int i = 0; i < arguments.Count; i++)
|
|
imported_arguments.Add (ImportType (arguments [i], context));
|
|
|
|
return imported_instance;
|
|
}
|
|
|
|
public virtual TypeReference ImportReference (TypeReference type, IGenericParameterProvider context)
|
|
{
|
|
Mixin.CheckType (type);
|
|
return ImportType (type, ImportGenericContext.For (context));
|
|
}
|
|
|
|
public virtual FieldReference ImportReference (FieldReference field, IGenericParameterProvider context)
|
|
{
|
|
Mixin.CheckField (field);
|
|
return ImportField (field, ImportGenericContext.For (context));
|
|
}
|
|
|
|
public virtual MethodReference ImportReference (MethodReference method, IGenericParameterProvider context)
|
|
{
|
|
Mixin.CheckMethod (method);
|
|
return ImportMethod (method, ImportGenericContext.For (context));
|
|
}
|
|
}
|
|
|
|
static partial class Mixin {
|
|
|
|
public static void CheckModule (ModuleDefinition module)
|
|
{
|
|
if (module == null)
|
|
throw new ArgumentNullException (Argument.module.ToString ());
|
|
}
|
|
|
|
public static bool TryGetAssemblyNameReference (this ModuleDefinition module, AssemblyNameReference name_reference, out AssemblyNameReference assembly_reference)
|
|
{
|
|
var references = module.AssemblyReferences;
|
|
|
|
for (int i = 0; i < references.Count; i++) {
|
|
var reference = references [i];
|
|
if (!Equals (name_reference, reference))
|
|
continue;
|
|
|
|
assembly_reference = reference;
|
|
return true;
|
|
}
|
|
|
|
assembly_reference = null;
|
|
return false;
|
|
}
|
|
|
|
static bool Equals (byte [] a, byte [] b)
|
|
{
|
|
if (ReferenceEquals (a, b))
|
|
return true;
|
|
if (a == null)
|
|
return false;
|
|
if (a.Length != b.Length)
|
|
return false;
|
|
for (int i = 0; i < a.Length; i++)
|
|
if (a [i] != b [i])
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static bool Equals<T> (T a, T b) where T : class, IEquatable<T>
|
|
{
|
|
if (ReferenceEquals (a, b))
|
|
return true;
|
|
if (a == null)
|
|
return false;
|
|
return a.Equals (b);
|
|
}
|
|
|
|
static bool Equals (AssemblyNameReference a, AssemblyNameReference b)
|
|
{
|
|
if (ReferenceEquals (a, b))
|
|
return true;
|
|
if (a.Name != b.Name)
|
|
return false;
|
|
if (!Equals (a.Version, b.Version))
|
|
return false;
|
|
if (a.Culture != b.Culture)
|
|
return false;
|
|
if (!Equals (a.PublicKeyToken, b.PublicKeyToken))
|
|
return false;
|
|
return true;
|
|
}
|
|
}
|
|
}
|