Refactored handling of debug mapping in the decompiler: we now avoid using a side-channel for the debug info and instead return it via the ITextOutput.

ICSharpCode.Decompiler/Ast/AstBuilder.cs

@@ -49,7 +49,7 @@ namespace ICSharpCode.Decompiler.Ast
 		DoNotUsePrimitiveTypeNames = 4
 	}
 	
-	public class AstBuilder : BaseCodeMappings
+	public class AstBuilder
 	{
 		DecompilerContext context;
 		CompilationUnit astCompileUnit = new CompilationUnit();
@@ -62,10 +62,6 @@ namespace ICSharpCode.Decompiler.Ast
 				throw new ArgumentNullException("context");
 			this.context = context;
 			this.DecompileMethodBodies = true;
-			
-			this.LocalVariables = new ConcurrentDictionary<int, IEnumerable<ILVariable>>();
-			this.CodeMappings = new Dictionary<int, List<MemberMapping>>();
-			this.DecompiledMemberReferences = new Dictionary<int, MemberReference>();
 		}
 		
 		public static bool MemberIsHidden(MemberReference member, DecompilerSettings settings)
@@ -729,11 +725,7 @@ namespace ICSharpCode.Decompiler.Ast
 
 		AttributedNode CreateMethod(MethodDefinition methodDef)
 		{
-			// Create mapping - used in debugger
-			CreateCodeMappings(methodDef.MetadataToken.ToInt32(), methodDef);
-			MemberMapping methodMapping = methodDef.CreateCodeMapping(this.CodeMappings[methodDef.MetadataToken.ToInt32()]);
-			
-			MethodDeclaration astMethod = new MethodDeclaration().WithAnnotation(methodMapping);
+			MethodDeclaration astMethod = new MethodDeclaration();
 			astMethod.AddAnnotation(methodDef);
 			astMethod.ReturnType = ConvertType(methodDef.ReturnType, methodDef.MethodReturnType);
 			astMethod.Name = CleanName(methodDef.Name);
@@ -823,10 +815,6 @@ namespace ICSharpCode.Decompiler.Ast
 		
 		ConstructorDeclaration CreateConstructor(MethodDefinition methodDef)
 		{
-			// Create mapping - used in debugger
-			CreateCodeMappings(methodDef.MetadataToken.ToInt32(), methodDef);
-			MemberMapping methodMapping = methodDef.CreateCodeMapping(this.CodeMappings[methodDef.MetadataToken.ToInt32()]);
-			
 			ConstructorDeclaration astMethod = new ConstructorDeclaration();
 			astMethod.AddAnnotation(methodDef);
 			astMethod.Modifiers = ConvertModifiers(methodDef);
@@ -838,7 +826,6 @@ namespace ICSharpCode.Decompiler.Ast
 			astMethod.Parameters.AddRange(MakeParameters(methodDef));
 			astMethod.Body = CreateMethodBody(methodDef, astMethod.Parameters);
 			ConvertAttributes(astMethod, methodDef);
-			astMethod.WithAnnotation(methodMapping);
 			if (methodDef.IsStatic && methodDef.DeclaringType.IsBeforeFieldInit && !astMethod.Body.IsNull) {
 				astMethod.Body.InsertChildAfter(null, new Comment(" Note: this type is marked as 'beforefieldinit'."), AstNode.Roles.Comment);
 			}
@@ -891,10 +878,6 @@ namespace ICSharpCode.Decompiler.Ast
 			astProp.ReturnType = ConvertType(propDef.PropertyType, propDef);
 			
 			if (propDef.GetMethod != null) {
-				// Create mapping - used in debugger
-				CreateCodeMappings(propDef.GetMethod.MetadataToken.ToInt32(), propDef);
-				MemberMapping methodMapping = propDef.GetMethod.CreateCodeMapping(this.CodeMappings[propDef.GetMethod.MetadataToken.ToInt32()], propDef);
-				
 				astProp.Getter = new Accessor();
 				astProp.Getter.Body = CreateMethodBody(propDef.GetMethod);
 				astProp.Getter.AddAnnotation(propDef.GetMethod);
@@ -902,14 +885,8 @@ namespace ICSharpCode.Decompiler.Ast
 				
 				if ((getterModifiers & Modifiers.VisibilityMask) != (astProp.Modifiers & Modifiers.VisibilityMask))
 					astProp.Getter.Modifiers = getterModifiers & Modifiers.VisibilityMask;
-				
-				astProp.Getter.WithAnnotation(methodMapping);
 			}
 			if (propDef.SetMethod != null) {
-				// Create mapping - used in debugger
-				CreateCodeMappings(propDef.SetMethod.MetadataToken.ToInt32(), propDef);
-				MemberMapping methodMapping = propDef.SetMethod.CreateCodeMapping(this.CodeMappings[propDef.SetMethod.MetadataToken.ToInt32()], propDef);
-				
 				astProp.Setter = new Accessor();
 				astProp.Setter.Body = CreateMethodBody(propDef.SetMethod);
 				astProp.Setter.AddAnnotation(propDef.SetMethod);
@@ -924,8 +901,6 @@ namespace ICSharpCode.Decompiler.Ast
 				
 				if ((setterModifiers & Modifiers.VisibilityMask) != (astProp.Modifiers & Modifiers.VisibilityMask))
 					astProp.Setter.Modifiers = setterModifiers & Modifiers.VisibilityMask;
-				
-				astProp.Setter.WithAnnotation(methodMapping);
 			}
 			ConvertCustomAttributes(astProp, propDef);
 
@@ -977,28 +952,16 @@ namespace ICSharpCode.Decompiler.Ast
 					astEvent.PrivateImplementationType = ConvertType(eventDef.AddMethod.Overrides.First().DeclaringType);
 				
 				if (eventDef.AddMethod != null) {
-					// Create mapping - used in debugger
-					CreateCodeMappings(eventDef.AddMethod.MetadataToken.ToInt32(), eventDef);
-					MemberMapping methodMapping = eventDef.AddMethod.CreateCodeMapping(this.CodeMappings[eventDef.AddMethod.MetadataToken.ToInt32()], eventDef);
-					
 					astEvent.AddAccessor = new Accessor {
 						Body = CreateMethodBody(eventDef.AddMethod)
 					}.WithAnnotation(eventDef.AddMethod);
 					ConvertAttributes(astEvent.AddAccessor, eventDef.AddMethod);
-					
-					astEvent.AddAccessor.WithAnnotation(methodMapping);
 				}
 				if (eventDef.RemoveMethod != null) {
-					// Create mapping - used in debugger
-					CreateCodeMappings(eventDef.RemoveMethod.MetadataToken.ToInt32(), eventDef);
-					MemberMapping methodMapping = eventDef.RemoveMethod.CreateCodeMapping(this.CodeMappings[eventDef.RemoveMethod.MetadataToken.ToInt32()], eventDef);
-					
 					astEvent.RemoveAccessor = new Accessor {
 						Body = CreateMethodBody(eventDef.RemoveMethod)
 					}.WithAnnotation(eventDef.RemoveMethod);
 					ConvertAttributes(astEvent.RemoveAccessor, eventDef.RemoveMethod);
-					
-					astEvent.RemoveAccessor.WithAnnotation(methodMapping);
 				}
 				MethodDefinition accessor = eventDef.AddMethod ?? eventDef.RemoveMethod;
 				if (accessor.IsVirtual == accessor.IsNewSlot) {
@@ -1013,15 +976,13 @@ namespace ICSharpCode.Decompiler.Ast
 		BlockStatement CreateMethodBody(MethodDefinition method, IEnumerable<ParameterDeclaration> parameters = null)
 		{
 			if (DecompileMethodBodies)
-				return AstMethodBodyBuilder.CreateMethodBody(method, context, parameters, LocalVariables);
+				return AstMethodBodyBuilder.CreateMethodBody(method, context, parameters);
 			else
 				return null;
 		}
 
 		FieldDeclaration CreateField(FieldDefinition fieldDef)
 		{
-			this.DecompiledMemberReferences.Add(fieldDef.MetadataToken.ToInt32(), fieldDef);
-			
 			FieldDeclaration astField = new FieldDeclaration();
 			astField.AddAnnotation(fieldDef);
 			VariableInitializer initializer = new VariableInitializer(CleanName(fieldDef.Name));
@@ -1673,11 +1634,5 @@ namespace ICSharpCode.Decompiler.Ast
 			                   && (condition == null || condition(m))
 			                   && TypesHierarchyHelpers.IsVisibleFromDerived(m, derived.DeclaringType));
 		}
-		
-		/// <summary>
-		/// Gets the local variables for the current decompiled type, method, etc.
-		/// <remarks>The key is the metadata token.</remarks>
-		/// </summary>
-		public ConcurrentDictionary<int, IEnumerable<ILVariable>> LocalVariables { get; private set; }
 	}
 }

ICSharpCode.Decompiler/Ast/AstMethodBodyBuilder.cs

@@ -50,16 +50,11 @@ namespace ICSharpCode.Decompiler.Ast
 		/// <param name="context">Decompilation context.</param>
 		/// <param name="parameters">Parameter declarations of the method being decompiled.
 		/// These are used to update the parameter names when the decompiler generates names for the parameters.</param>
-		/// <param name="localVariables">Local variables storage that will be filled/updated with the local variables.</param>
 		/// <returns>Block for the method body</returns>
 		public static BlockStatement CreateMethodBody(MethodDefinition methodDef,
 		                                              DecompilerContext context,
-		                                              IEnumerable<ParameterDeclaration> parameters = null,
-		                                              ConcurrentDictionary<int, IEnumerable<ILVariable>> localVariables = null)
+		                                              IEnumerable<ParameterDeclaration> parameters = null)
 		{
-			if (localVariables == null)
-				localVariables = new ConcurrentDictionary<int, IEnumerable<ILVariable>>();
-			
 			MethodDefinition oldCurrentMethod = context.CurrentMethod;
 			Debug.Assert(oldCurrentMethod == null || oldCurrentMethod == methodDef);
 			context.CurrentMethod = methodDef;
@@ -69,10 +64,10 @@ namespace ICSharpCode.Decompiler.Ast
 				builder.context = context;
 				builder.typeSystem = methodDef.Module.TypeSystem;
 				if (Debugger.IsAttached) {
-					return builder.CreateMethodBody(parameters, localVariables);
+					return builder.CreateMethodBody(parameters);
 				} else {
 					try {
-						return builder.CreateMethodBody(parameters, localVariables);
+						return builder.CreateMethodBody(parameters);
 					} catch (OperationCanceledException) {
 						throw;
 					} catch (Exception ex) {
@@ -84,13 +79,11 @@ namespace ICSharpCode.Decompiler.Ast
 			}
 		}
 		
-		public BlockStatement CreateMethodBody(IEnumerable<ParameterDeclaration> parameters,
-		                                       ConcurrentDictionary<int, IEnumerable<ILVariable>> localVariables)
+		public BlockStatement CreateMethodBody(IEnumerable<ParameterDeclaration> parameters)
 		{
-			if (methodDef.Body == null) return null;
-			
-			if (localVariables == null)
-				throw new ArgumentException("localVariables must be instantiated");
+			if (methodDef.Body == null) {
+				return null;
+			}
 			
 			context.CancellationToken.ThrowIfCancellationRequested();
 			ILBlock ilMethod = new ILBlock();
@@ -102,10 +95,10 @@ namespace ICSharpCode.Decompiler.Ast
 			bodyGraph.Optimize(context, ilMethod);
 			context.CancellationToken.ThrowIfCancellationRequested();
 			
-			var allVariables = ilMethod.GetSelfAndChildrenRecursive<ILExpression>().Select(e => e.Operand as ILVariable)
+			var localVariables = ilMethod.GetSelfAndChildrenRecursive<ILExpression>().Select(e => e.Operand as ILVariable)
 				.Where(v => v != null && !v.IsParameter).Distinct();
 			Debug.Assert(context.CurrentMethod == methodDef);
-			NameVariables.AssignNamesToVariables(context, astBuilder.Parameters, allVariables, ilMethod);
+			NameVariables.AssignNamesToVariables(context, astBuilder.Parameters, localVariables, ilMethod);
 			
 			if (parameters != null) {
 				foreach (var pair in (from p in parameters
@@ -132,9 +125,7 @@ namespace ICSharpCode.Decompiler.Ast
 				astBlock.Statements.InsertBefore(insertionPoint, newVarDecl);
 			}
 			
-			// store the variables - used for debugger
-			int token = methodDef.MetadataToken.ToInt32();
-			localVariables.AddOrUpdate(token, allVariables, (key, oldValue) => allVariables);
+			astBlock.AddAnnotation(new MemberMapping(methodDef));
 			
 			return astBlock;
 		}

ICSharpCode.Decompiler/Ast/TextOutputFormatter.cs

@@ -19,9 +19,9 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-
 using ICSharpCode.Decompiler;
 using ICSharpCode.Decompiler.ILAst;
+using ICSharpCode.NRefactory;
 using ICSharpCode.NRefactory.CSharp;
 using Mono.Cecil;
 
@@ -198,48 +198,51 @@ namespace ICSharpCode.Decompiler.Ast
 			}
 		}
 		
+		Stack<TextLocation> startLocations = new Stack<TextLocation>();
+		MemberMapping currentMemberMapping;
+		Stack<MemberMapping> parentMemberMappings = new Stack<MemberMapping>();
+		
 		public void StartNode(AstNode node)
 		{
-			// code mappings
-			var ranges = node.Annotation<List<ILRange>>();
-			if (ranges != null && ranges.Count > 0) {
-				// find the ancestor that has method mapping as annotation
-				if (node.Parent != null)
-				{
-					var n = node.Ancestors.FirstOrDefault(a => a.Annotation<MemberMapping>() != null);
-					if (n != null) {
-						MemberMapping mapping = n.Annotation<MemberMapping>();
-
-						// add all ranges
-						foreach (var range in ranges) {
-							mapping.MemberCodeMappings.Add(new SourceCodeMapping {
-							                               	ILInstructionOffset = range,
-							                               	SourceCodeLine = output.Location.Line,
-							                               	MemberMapping = mapping
-							                               });
-						}
-					}
-				}
-			}
-			
-			// definitions of types and their members
-			Predicate<AstNode> predicate = n => n is AttributedNode;
+			nodeStack.Push(node);
+			startLocations.Push(output.Location);
 			
-			if (predicate(node)) {
-				var n = node as AttributedNode;
-				int attributesCount = 0;
-				if (n != null)
-					attributesCount = n.Attributes.Count;
-				node.AddAnnotation(new TextOutputLocation { Line = output.Location.Line + attributesCount, Column = output.Location.Column});
+			MemberMapping mapping = node.Annotation<MemberMapping>();
+			if (mapping != null) {
+				parentMemberMappings.Push(currentMemberMapping);
+				currentMemberMapping = mapping;
 			}
-			
-			nodeStack.Push(node);
 		}
 		
 		public void EndNode(AstNode node)
 		{
 			if (nodeStack.Pop() != node)
 				throw new InvalidOperationException();
+			
+			var startLocation = startLocations.Pop();
+			
+			// code mappings
+			if (currentMemberMapping != null) {
+				var ranges = node.Annotation<List<ILRange>>();
+				if (ranges != null && ranges.Count > 0) {
+					// add all ranges
+					foreach (var range in ranges) {
+						currentMemberMapping.MemberCodeMappings.Add(
+							new SourceCodeMapping {
+								ILInstructionOffset = range,
+								StartLocation = startLocation,
+								EndLocation = output.Location,
+								MemberMapping = currentMemberMapping
+							});
+					}
+				}
+			}
+			
+			
+			if (node.Annotation<MemberMapping>() != null) {
+				output.AddDebuggerMemberMapping(currentMemberMapping);
+				currentMemberMapping = parentMemberMappings.Pop();
+			}
 		}
 	}
 }

ICSharpCode.Decompiler/CodeMappings.cs

@@ -20,15 +20,16 @@ using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
-
 using ICSharpCode.Decompiler.Ast;
 using ICSharpCode.Decompiler.Disassembler;
 using ICSharpCode.Decompiler.ILAst;
+using ICSharpCode.NRefactory;
 using ICSharpCode.NRefactory.CSharp;
 using Mono.Cecil;
 
 namespace ICSharpCode.Decompiler
 {
+	[Obsolete]
 	public enum DecompiledLanguages
 	{
 		IL,
@@ -36,57 +37,36 @@ namespace ICSharpCode.Decompiler
 	}
 	
 	/// <summary>
-	/// Base class for decompliler classes : AstBuilder & ReflectionDisassembler.
+	/// Maps the source code to IL.
 	/// </summary>
-	public abstract class BaseCodeMappings
+	public sealed class SourceCodeMapping
 	{
-		/// <summary>
-		/// Gets the code mappings.
-		/// <remarks>Key is the metadata token.</remarks>
-		/// </summary>
-		public Dictionary<int, List<MemberMapping>> CodeMappings { get; protected set; }
+		[Obsolete("Use StartLocation instead - there might be multiple statements per line (e.g. for loops)")]
+		public int SourceCodeLine {
+			get {
+				return this.StartLocation.Line;
+			}
+		}
 		
 		/// <summary>
-		/// Gets the MembeReference that is decompiled (a MethodDefinition, PropertyDefinition etc.)
-		/// <remarks>Key is the metadata token.</remarks>
+		/// Gets or sets the start location of the instruction.
 		/// </summary>
-		public Dictionary<int, MemberReference> DecompiledMemberReferences { get; protected set; }
+		public TextLocation StartLocation { get; set; }
 		
 		/// <summary>
-		/// Create data in the CodeMappings and DecompiledMemberReferences.
-		/// </summary>
-		/// <param name="token">Token of the current method.</param>
-		/// <param name="member">Current member (MethodDefinition, PropertyDefinition, EventDefinition).</param>
-		/// <remarks>The token is used in CodeMappings; member (and its token) is used in DecompiledMemberReferences.</remarks>
-		protected virtual void CreateCodeMappings(int token, MemberReference member)
-		{
-			this.CodeMappings.Add(token, new List<MemberMapping>());
-			
-			int t = member.MetadataToken.ToInt32();
-			if (!this.DecompiledMemberReferences.ContainsKey(t))
-				this.DecompiledMemberReferences.Add(t, member);
-		}
-	}
-	
-	/// <summary>
-	/// Maps the source code to IL.
-	/// </summary>
-	public sealed class SourceCodeMapping
-	{
-		/// <summary>
-		/// Gets or sets the source code line number in the output.
+		/// Gets or sets the end location of the instruction.
 		/// </summary>
-		public int SourceCodeLine { get; internal set; }
+		public TextLocation EndLocation { get; set; }
 		
 		/// <summary>
 		/// Gets or sets IL Range offset for the source code line. E.g.: 13-19 &lt;-&gt; 135.
 		/// </summary>
-		public ILRange ILInstructionOffset { get; internal set; }
+		public ILRange ILInstructionOffset { get; set; }
 		
 		/// <summary>
 		/// Gets or sets the member mapping this source code mapping belongs to.
 		/// </summary>
-		public MemberMapping MemberMapping { get; internal set; }
+		public MemberMapping MemberMapping { get; set; }
 		
 		/// <summary>
 		/// Retrieves the array that contains the IL range and the missing gaps between ranges.
@@ -129,6 +109,18 @@ namespace ICSharpCode.Decompiler
 	{
 		IEnumerable<ILRange> invertedList;
 		
+		internal MemberMapping()
+		{
+		}
+		
+		public MemberMapping(MethodDefinition method)
+		{
+			this.MetadataToken = method.MetadataToken.ToInt32();
+			this.MemberCodeMappings = new List<SourceCodeMapping>();
+			this.MemberReference = method;
+			this.CodeSize = method.Body.CodeSize;
+		}
+		
 		/// <summary>
 		/// Gets or sets the type of the mapping.
 		/// </summary>
@@ -245,7 +237,7 @@ namespace ICSharpCode.Decompiler
 		public static SourceCodeMapping GetInstructionByTokenAndOffset(
 			this List<MemberMapping> codeMappings,
 			int token,
-			int ilOffset, 
+			int ilOffset,
 			out bool isMatch)
 		{
 			isMatch = false;
@@ -317,30 +309,4 @@ namespace ICSharpCode.Decompiler
 			return true;
 		}
 	}
-	
-	/// <summary>
-	/// Decompilation data. Can be used by other applications to store the decompilation data.
-	/// </summary>
-	public class DecompileInformation
-	{
-		/// <summary>
-		/// Gets ot sets the code mappings
-		/// </summary>
-		public Dictionary<int, List<MemberMapping>> CodeMappings { get; set; }
-		
-		/// <summary>
-		/// Gets or sets the local variables.
-		/// </summary>
-		public ConcurrentDictionary<int, IEnumerable<ILVariable>> LocalVariables { get; set; }
-		
-		/// <summary>
-		/// Gets the list of MembeReferences that are decompiled (TypeDefinitions, MethodDefinitions, etc)
-		/// </summary>
-		public Dictionary<int, MemberReference> DecompiledMemberReferences { get; set; }
-		
-		/// <summary>
-		/// Gets (or internal sets) the AST nodes.
-		/// </summary>
-		public IEnumerable<AstNode> AstNodes { get; set; }
-	}
 }

ICSharpCode.Decompiler/Disassembler/MethodBodyDisassembler.cs

@@ -85,13 +85,15 @@ namespace ICSharpCode.Decompiler.Disassembler
 				WriteStructureBody(new ILStructure(body), branchTargets, ref inst, methodMapping, method.Body.CodeSize);
 			} else {
 				foreach (var inst in method.Body.Instructions) {
+					var startLocation = output.Location;
 					inst.WriteTo(output);
 					
 					if (methodMapping != null) {
 						// add IL code mappings - used in debugger
 						methodMapping.MemberCodeMappings.Add(
 							new SourceCodeMapping() {
-								SourceCodeLine = output.Location.Line,
+								StartLocation = output.Location,
+								EndLocation = output.Location,
 								ILInstructionOffset = new ILRange { From = inst.Offset, To = inst.Next == null ? method.Body.CodeSize : inst.Next.Offset },
 								MemberMapping = methodMapping
 							});
@@ -188,13 +190,15 @@ namespace ICSharpCode.Decompiler.Disassembler
 					if (!isFirstInstructionInStructure && (prevInstructionWasBranch || branchTargets.Contains(offset))) {
 						output.WriteLine(); // put an empty line after branches, and in front of branch targets
 					}
+					var startLocation = output.Location;
 					inst.WriteTo(output);
 					
 					// add IL code mappings - used in debugger
 					if (currentMethodMapping != null) {
 						currentMethodMapping.MemberCodeMappings.Add(
 							new SourceCodeMapping() {
-								SourceCodeLine = output.Location.Line,
+								StartLocation = startLocation,
+								EndLocation = output.Location,
 								ILInstructionOffset = new ILRange { From = inst.Offset, To = inst.Next == null ? codeSize : inst.Next.Offset },
 								MemberMapping = currentMethodMapping
 							});

ICSharpCode.Decompiler/Disassembler/ReflectionDisassembler.cs

@@ -30,7 +30,7 @@ namespace ICSharpCode.Decompiler.Disassembler
 	/// <summary>
 	/// Disassembles type and member definitions.
 	/// </summary>
-	public sealed class ReflectionDisassembler : BaseCodeMappings
+	public sealed class ReflectionDisassembler
 	{
 		ITextOutput output;
 		CancellationToken cancellationToken;
@@ -45,9 +45,6 @@ namespace ICSharpCode.Decompiler.Disassembler
 			this.output = output;
 			this.cancellationToken = cancellationToken;
 			this.methodBodyDisassembler = new MethodBodyDisassembler(output, detectControlStructure, cancellationToken);
-			
-			this.CodeMappings = new Dictionary<int, List<MemberMapping>>();
-			this.DecompiledMemberReferences = new Dictionary<int, MemberReference>();
 		}
 		
 		#region Disassemble Method
@@ -220,9 +217,9 @@ namespace ICSharpCode.Decompiler.Disassembler
 			
 			if (method.HasBody) {
 				// create IL code mappings - used in debugger
-				CreateCodeMappings(method.MetadataToken.ToInt32(), currentMember);
-				MemberMapping methodMapping = method.CreateCodeMapping(this.CodeMappings[method.MetadataToken.ToInt32()], currentMember);
+				MemberMapping methodMapping = new MemberMapping(method);
 				methodBodyDisassembler.Disassemble(method.Body, methodMapping);
+				output.AddDebuggerMemberMapping(methodMapping);
 			}
 			
 			CloseBlock("end of method " + DisassemblerHelpers.Escape(method.DeclaringType.Name) + "::" + DisassemblerHelpers.Escape(method.Name));
@@ -676,9 +673,6 @@ namespace ICSharpCode.Decompiler.Disassembler
 		
 		public void DisassembleField(FieldDefinition field)
 		{
-			// create mappings for decompiled fields only
-			this.DecompiledMemberReferences.Add(field.MetadataToken.ToInt32(), field);
-			
 			output.WriteDefinition(".field ", field);
 			WriteEnum(field.Attributes & FieldAttributes.FieldAccessMask, fieldVisibility);
 			const FieldAttributes hasXAttributes = FieldAttributes.HasDefault | FieldAttributes.HasFieldMarshal | FieldAttributes.HasFieldRVA;

ICSharpCode.Decompiler/ITextOutput.cs

@@ -18,12 +18,13 @@
 
 using System;
 using System.IO;
+using ICSharpCode.NRefactory;
 
 namespace ICSharpCode.Decompiler
 {
 	public interface ITextOutput
 	{
-		TextOutputLocation Location { get; }
+		TextLocation Location { get; }
 		
 		void Indent();
 		void Unindent();
@@ -33,16 +34,12 @@ namespace ICSharpCode.Decompiler
 		void WriteDefinition(string text, object definition);
 		void WriteReference(string text, object reference, bool isLocal = false);
 		
+		void AddDebuggerMemberMapping(MemberMapping memberMapping);
+		
 		void MarkFoldStart(string collapsedText = "...", bool defaultCollapsed = false);
 		void MarkFoldEnd();
 	}
 	
-	public sealed class TextOutputLocation
-	{
-		public int Line { get; set; }
-		public int Column { get; set; }
-	}
-	
 	public static class TextOutputExtensions
 	{
 		public static void Write(this ITextOutput output, string format, params object[] args)

ICSharpCode.Decompiler/PlainTextOutput.cs

@@ -18,17 +18,18 @@
 
 using System;
 using System.IO;
+using ICSharpCode.NRefactory;
 
 namespace ICSharpCode.Decompiler
 {
 	public sealed class PlainTextOutput : ITextOutput
 	{
-		const int TAB_SIZE = 4;
-		
 		readonly TextWriter writer;
 		int indent;
 		bool needsIndent;
-		TextOutputLocation location = new TextOutputLocation { Line = 1, Column = 1};
+		
+		int line = 1;
+		int column = 1;
 		
 		public PlainTextOutput(TextWriter writer)
 		{
@@ -42,8 +43,10 @@ namespace ICSharpCode.Decompiler
 			this.writer = new StringWriter();
 		}
 		
-		public TextOutputLocation Location { 
-			get { return location; }
+		public TextLocation Location {
+			get {
+				return new TextLocation(line, column + (needsIndent ? indent : 0));
+			}
 		}
 		
 		public override string ToString()
@@ -67,8 +70,8 @@ namespace ICSharpCode.Decompiler
 				needsIndent = false;
 				for (int i = 0; i < indent; i++) {
 					writer.Write('\t');
-					location.Column += TAB_SIZE - 1;
 				}
+				column += indent;
 			}
 		}
 		
@@ -76,22 +79,22 @@ namespace ICSharpCode.Decompiler
 		{
 			WriteIndent();
 			writer.Write(ch);
-			location.Column++;
+			column++;
 		}
 		
 		public void Write(string text)
 		{
 			WriteIndent();
 			writer.Write(text);
-			location.Column += text.Length;
+			column += text.Length;
 		}
 		
 		public void WriteLine()
 		{
-			location.Line++;
 			writer.WriteLine();
 			needsIndent = true;
-			location.Column = TAB_SIZE * indent;
+			line++;
+			column = 1;
 		}
 		
 		public void WriteDefinition(string text, object definition)
@@ -111,5 +114,9 @@ namespace ICSharpCode.Decompiler
 		void ITextOutput.MarkFoldEnd()
 		{
 		}
+		
+		void ITextOutput.AddDebuggerMemberMapping(MemberMapping memberMapping)
+		{
+		}
 	}
 }

ILSpy/Bookmarks/MemberBookmark.cs

@@ -92,9 +92,9 @@ namespace ICSharpCode.ILSpy.Bookmarks
 		
 		public int LineNumber {
 			get {
-				var t = node.Annotation<TextOutputLocation>();
-				if (t != null)
-					return t.Line;
+				//var t = node.Annotation<TextOutputLocation>();
+				//if (t != null)
+				//	return t.Line;
 				return 0;
 			}
 		}

ILSpy/Languages/CSharpLanguage.cs

@@ -100,7 +100,6 @@ namespace ICSharpCode.ILSpy
 				codeDomBuilder.AddMethod(method);
 				RunTransformsAndGenerateCode(codeDomBuilder, output, options);
 			}
-			NotifyDecompilationFinished(codeDomBuilder);
 		}
 		
 		class SelectCtorTransform : IAstTransform
@@ -145,7 +144,6 @@ namespace ICSharpCode.ILSpy
 			AstBuilder codeDomBuilder = CreateAstBuilder(options, currentType: property.DeclaringType, isSingleMember: true);
 			codeDomBuilder.AddProperty(property);
 			RunTransformsAndGenerateCode(codeDomBuilder, output, options);
-			NotifyDecompilationFinished(codeDomBuilder);
 		}
 
 		public override void DecompileField(FieldDefinition field, ITextOutput output, DecompilationOptions options)
@@ -159,7 +157,6 @@ namespace ICSharpCode.ILSpy
 				AddFieldsAndCtors(codeDomBuilder, field.DeclaringType, field.IsStatic);
 			}
 			RunTransformsAndGenerateCode(codeDomBuilder, output, options, new SelectFieldTransform(field));
-			NotifyDecompilationFinished(codeDomBuilder);
 		}
 		
 		/// <summary>
@@ -203,7 +200,6 @@ namespace ICSharpCode.ILSpy
 			AstBuilder codeDomBuilder = CreateAstBuilder(options, currentType: ev.DeclaringType, isSingleMember: true);
 			codeDomBuilder.AddEvent(ev);
 			RunTransformsAndGenerateCode(codeDomBuilder, output, options);
-			NotifyDecompilationFinished(codeDomBuilder);
 		}
 
 		public override void DecompileType(TypeDefinition type, ITextOutput output, DecompilationOptions options)
@@ -211,7 +207,6 @@ namespace ICSharpCode.ILSpy
 			AstBuilder codeDomBuilder = CreateAstBuilder(options, currentType: type);
 			codeDomBuilder.AddType(type);
 			RunTransformsAndGenerateCode(codeDomBuilder, output, options);
-			NotifyDecompilationFinished(codeDomBuilder);
 		}
 		
 		void RunTransformsAndGenerateCode(AstBuilder astBuilder, ITextOutput output, DecompilationOptions options, IAstTransform additionalTransform = null)
@@ -283,7 +278,6 @@ namespace ICSharpCode.ILSpy
 					codeDomBuilder.GenerateCode(output);
 				}
 			}
-			OnDecompilationFinished(null);
 		}
 
 		#region WriteProjectFile

ILSpy/Languages/ILLanguage.cs

@@ -52,14 +52,12 @@ namespace ICSharpCode.ILSpy
 		{
 			var dis = new ReflectionDisassembler(output, detectControlStructure, options.CancellationToken);
 			dis.DisassembleMethod(method);
-			NotifyDecompilationFinished(dis);
 		}
 		
 		public override void DecompileField(FieldDefinition field, ITextOutput output, DecompilationOptions options)
 		{
 			var dis = new ReflectionDisassembler(output, detectControlStructure, options.CancellationToken);
 			dis.DisassembleField(field);
-			NotifyDecompilationFinished(dis);
 		}
 		
 		public override void DecompileProperty(PropertyDefinition property, ITextOutput output, DecompilationOptions options)
@@ -78,7 +76,6 @@ namespace ICSharpCode.ILSpy
 				output.WriteLine();
 				rd.DisassembleMethod(m);
 			}
-			NotifyDecompilationFinished(rd);
 		}
 		
 		public override void DecompileEvent(EventDefinition ev, ITextOutput output, DecompilationOptions options)
@@ -97,20 +94,17 @@ namespace ICSharpCode.ILSpy
 				output.WriteLine();
 				rd.DisassembleMethod(m);
 			}
-			NotifyDecompilationFinished(rd);
 		}
 		
 		public override void DecompileType(TypeDefinition type, ITextOutput output, DecompilationOptions options)
 		{
 			var dis = new ReflectionDisassembler(output, detectControlStructure, options.CancellationToken);
 			dis.DisassembleType(type);
-			NotifyDecompilationFinished(dis);
 		}
 		
 		public override void DecompileNamespace(string nameSpace, IEnumerable<TypeDefinition> types, ITextOutput output, DecompilationOptions options)
 		{
 			new ReflectionDisassembler(output, detectControlStructure, options.CancellationToken).DisassembleNamespace(nameSpace, types);
-			OnDecompilationFinished(null);
 		}
 		
 		public override void DecompileAssembly(LoadedAssembly assembly, ITextOutput output, DecompilationOptions options)
@@ -129,7 +123,6 @@ namespace ICSharpCode.ILSpy
 				output.WriteLine();
 				rd.WriteModuleContents(assembly.AssemblyDefinition.MainModule);
 			}
-			OnDecompilationFinished(null);
 		}
 		
 		public override string TypeToString(TypeReference t, bool includeNamespace, ICustomAttributeProvider attributeProvider)

ILSpy/Languages/Language.cs

@@ -19,14 +19,10 @@
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
-using System.Linq;
 
 using ICSharpCode.Decompiler;
-using ICSharpCode.Decompiler.Ast;
-using ICSharpCode.Decompiler.Disassembler;
 using ICSharpCode.Decompiler.ILAst;
 using ICSharpCode.NRefactory.CSharp;
-using ICSharpCode.NRefactory.Utils;
 using Mono.Cecil;
 
 namespace ICSharpCode.ILSpy
@@ -34,6 +30,7 @@ namespace ICSharpCode.ILSpy
 	/// <summary>
 	/// Decompilation event arguments.
 	/// </summary>
+	[Obsolete]
 	public sealed class DecompileEventArgs : EventArgs
 	{
 		/// <summary>
@@ -65,7 +62,8 @@ namespace ICSharpCode.ILSpy
 		/// <summary>
 		/// Decompile finished event.
 		/// </summary>
-		public event EventHandler<DecompileEventArgs> DecompileFinished;
+		[Obsolete]
+		public event EventHandler<DecompileEventArgs> DecompileFinished { add {} remove {} }
 		
 		/// <summary>
 		/// Gets the name of the language (as shown in the UI)
@@ -121,7 +119,6 @@ namespace ICSharpCode.ILSpy
 		public virtual void DecompileNamespace(string nameSpace, IEnumerable<TypeDefinition> types, ITextOutput output, DecompilationOptions options)
 		{
 			WriteCommentLine(output, nameSpace);
-			OnDecompilationFinished(null);
 		}
 
 		public virtual void DecompileAssembly(LoadedAssembly assembly, ITextOutput output, DecompilationOptions options)
@@ -197,39 +194,5 @@ namespace ICSharpCode.ILSpy
 		{
 			return member;
 		}
-		
-		protected virtual void OnDecompilationFinished(DecompileEventArgs e)
-		{
-			if (DecompileFinished != null) {
-				DecompileFinished(this, e);
-			}
-		}
-		
-		protected void NotifyDecompilationFinished(BaseCodeMappings b)
-		{
-			if (b is AstBuilder) {
-				var builder = b as AstBuilder;
-				
-				var nodes = TreeTraversal
-					.PreOrder((AstNode)builder.CompilationUnit, n => n.Children)
-					.Where(n => n is AttributedNode && n.Annotation<TextOutputLocation>() != null);
-				
-				OnDecompilationFinished(new DecompileEventArgs {
-				                        	CodeMappings = builder.CodeMappings,
-				                        	LocalVariables = builder.LocalVariables,
-				                        	DecompiledMemberReferences = builder.DecompiledMemberReferences,
-				                        	AstNodes = nodes
-				                        });
-			}
-			
-			if (b is ReflectionDisassembler) {
-				var dis = b as ReflectionDisassembler;
-				OnDecompilationFinished(new DecompileEventArgs {
-				                        	CodeMappings = dis.CodeMappings,
-				                        	DecompiledMemberReferences = dis.DecompiledMemberReferences,
-				                        	AstNodes = null // TODO: how can I find the nodes with line numbers from dis?
-				                        });
-			}
-		}
 	}
 }

ILSpy/TextView/AvalonEditTextOutput.cs

@@ -67,8 +67,8 @@ namespace ICSharpCode.ILSpy.TextView
 	/// </summary>
 	public sealed class AvalonEditTextOutput : ISmartTextOutput
 	{
-		TextOutputLocation location = new TextOutputLocation { Line = 1, Column = 1 };
 		int lastLineStart = 0;
+		int lineNumber = 1;
 		readonly StringBuilder b = new StringBuilder();
 		
 		/// <summary>Current indentation level</summary>
@@ -92,6 +92,8 @@ namespace ICSharpCode.ILSpy.TextView
 		/// <summary>Embedded UIElements, see <see cref="UIElementGenerator"/>.</summary>
 		internal readonly List<KeyValuePair<int, Lazy<UIElement>>> UIElements = new List<KeyValuePair<int, Lazy<UIElement>>>();
 		
+		List<MemberMapping> memberMappings = new List<MemberMapping>();
+		
 		public AvalonEditTextOutput()
 		{
 		}
@@ -119,13 +121,16 @@ namespace ICSharpCode.ILSpy.TextView
 			get { return b.Length; }
 		}
 		
-		public TextOutputLocation Location {
-			get {
-				location.Column = b.Length - lastLineStart + 1;
-				return location;
+		public ICSharpCode.NRefactory.TextLocation Location {
+			get { 
+				return new ICSharpCode.NRefactory.TextLocation(lineNumber, b.Length - lastLineStart + 1 + (needsIndent ? indent : 0));
 			}
 		}
 		
+		public IList<MemberMapping> MemberMappings {
+			get { return memberMappings; }
+		}
+		
 		#region Text Document
 		TextDocument textDocument;
 		
@@ -197,7 +202,7 @@ namespace ICSharpCode.ILSpy.TextView
 			b.AppendLine();
 			needsIndent = true;
 			lastLineStart = b.Length;
-			location.Line++;
+			lineNumber++;
 			if (this.TextLength > LengthLimit) {
 				throw new OutputLengthExceededException();
 			}
@@ -248,5 +253,10 @@ namespace ICSharpCode.ILSpy.TextView
 				this.UIElements.Add(new KeyValuePair<int, Lazy<UIElement>>(this.TextLength, new Lazy<UIElement>(element)));
 			}
 		}
+		
+		public void AddDebuggerMemberMapping(MemberMapping memberMapping)
+		{
+			memberMappings.Add(memberMapping);
+		}
 	}
 }

ILSpy/VB/VBLanguage.cs

@@ -125,7 +125,6 @@ namespace ICSharpCode.ILSpy.VB
 					RunTransformsAndGenerateCode(codeDomBuilder, output, options, assembly.AssemblyDefinition.MainModule);
 				}
 			}
-			OnDecompilationFinished(null);
 		}
 		
 		static readonly string[] projectImports = new[] {