Stepping in IL debugger

Debugger/Debugger.Core/Breakpoint.cs

@@ -19,9 +19,9 @@ namespace Debugger
 		int    column;
 		bool   enabled;
 
-		SourcecodeSegment originalLocation;
+		protected SourcecodeSegment originalLocation;
 		
-		List<ICorDebugFunctionBreakpoint> corBreakpoints = new List<ICorDebugFunctionBreakpoint>();
+		protected List<ICorDebugFunctionBreakpoint> corBreakpoints = new List<ICorDebugFunctionBreakpoint>();
 		
 		public event EventHandler<BreakpointEventArgs> Hit;
 		public event EventHandler<BreakpointEventArgs> Set;
@@ -29,6 +29,7 @@ namespace Debugger
 		[Debugger.Tests.Ignore]
 		public NDebugger Debugger {
 			get { return debugger; }
+			protected set { debugger = value; }
 		}
 		
 		public string FileName {
@@ -46,6 +47,7 @@ namespace Debugger
 		
 		public int Column {
 			get { return column; }
+			protected set { column = value; }
 		}
 		
 		public bool Enabled {
@@ -94,6 +96,8 @@ namespace Debugger
 			this.corBreakpoints.Add(corBreakpoint);
 		}
 		
+		public Breakpoint() { }
+		
 		public Breakpoint(NDebugger debugger, string fileName, byte[] checkSum, int line, int column, bool enabled)
 		{
 			this.debugger = debugger;
@@ -138,7 +142,7 @@ namespace Debugger
 			corBreakpoints.Clear();
 		}
 		
-		internal bool SetBreakpoint(Module module)
+		internal virtual bool SetBreakpoint(Module module)
 		{
 			if (this.fileName == null)
 				return false;
@@ -165,6 +169,41 @@ namespace Debugger
 		}
 	}
 	
+	public class ILBreakpoint : Breakpoint
+	{
+		public ILBreakpoint(NDebugger debugger, int line, uint metadataToken, int ilOffset, bool enabled)
+		{
+			this.Debugger = debugger;
+			this.Line = line;
+			this.MetadataToken = metadataToken;
+			this.ILOffset = ilOffset;
+			this.Enabled = enabled;
+		}
+		
+		public uint MetadataToken { get; private set; }
+		
+		public int ILOffset { get; private set; }
+		
+		internal override bool SetBreakpoint(Module module)
+		{
+			SourcecodeSegment segment = SourcecodeSegment.CreateForIL(module, this.Line, (int)MetadataToken, ILOffset);
+			
+			try {
+				ICorDebugFunctionBreakpoint corBreakpoint = segment.CorFunction.GetILCode().CreateBreakpoint((uint)segment.ILStart);
+				corBreakpoint.Activate(Enabled ? 1 : 0);
+				
+				corBreakpoints.Add(corBreakpoint);
+				
+				OnSet(new BreakpointEventArgs(this));
+				
+				return true;
+			}
+			catch (COMException) {
+				return false;
+			}
+		}
+	}
+	
 	[Serializable]
 	public class BreakpointEventArgs : DebuggerEventArgs
 	{

Debugger/Debugger.Core/SourcecodeSegment.cs

@@ -16,6 +16,7 @@ namespace Debugger
 		Module module;
 		
 		string filename;
+		string typename;
 		byte[] checkSum;
 		int startLine;
 		int startColumn;
@@ -35,6 +36,10 @@ namespace Debugger
 			get { return filename; }
 		}
 		
+		public string Typename {
+			get { return typename; }
+		}
+		
 		public byte[] CheckSum {
 			get { return checkSum; }
 		}
@@ -336,7 +341,27 @@ namespace Debugger
 		
 		public override string ToString()
 		{
-			return string.Format("{0}:{1},{2}-{3},{4}", Path.GetFileName(this.Filename), this.startLine, this.startColumn, this.endLine, this.endColumn);
+			return string.Format("{0}:{1},{2}-{3},{4}", 
+			                     Path.GetFileName(this.Filename ?? string.Empty), 
+			                     this.startLine, this.startColumn, this.endLine, this.endColumn);
+		}
+		
+		public static SourcecodeSegment CreateForIL(Module module, int line, int metadataToken, int iLOffset)
+		{
+			SourcecodeSegment segment = new SourcecodeSegment();
+			segment.module        = module;
+			segment.typename      = null;
+			segment.checkSum      = null;
+			segment.startLine     = line;
+			segment.startColumn   = 0;
+			segment.endLine       = line;
+			segment.endColumn     = 0;
+			segment.corFunction   = module.CorModule.GetFunctionFromToken((uint)metadataToken);
+			segment.ilStart = iLOffset;
+			segment.ilEnd   = iLOffset;
+			segment.stepRanges    = null;
+			
+			return segment;
 		}
 	}
 }

Debugger/ILSpy.Debugger/AvalonEdit/IconBarMargin.cs

@@ -27,31 +27,23 @@ using ICSharpCode.AvalonEdit.Rendering;
 using ICSharpCode.AvalonEdit.Utils;
 using ILSpy.Debugger.Bookmarks;
 using ILSpy.Debugger.Services;
+using Mono.Cecil;
 
 namespace ILSpy.Debugger.AvalonEdit
 {
 	public class IconBarMargin : AbstractMargin, IDisposable
 	{
-		static string currentTypeName;
+		static TypeDefinition currentTypeName;
 		
-		public static string CurrentTypeName {
-			get {
-				return currentTypeName; }
+		public static TypeDefinition CurrentType {
+			get { return currentTypeName; }
 			set { currentTypeName = value; }
 		}
 		
-		#region OnTextViewChanged
-		/// <inheritdoc/>
-		protected override void OnTextViewChanged(TextView oldTextView, TextView newTextView)
-		{
-			InvalidateVisual();
-		}
-		
 		public virtual void Dispose()
 		{
 			this.TextView = null; // detach from TextView (will also detach from manager)
 		}
-		#endregion
 		
 		/// <inheritdoc/>
 		protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters)
@@ -80,7 +72,7 @@ namespace ILSpy.Debugger.AvalonEdit
 				// create a dictionary line number => first bookmark
 				Dictionary<int, BookmarkBase> bookmarkDict = new Dictionary<int, BookmarkBase>();
 				foreach (var bm in BookmarkManager.Bookmarks) {
-					if (bm.TypeName != IconBarMargin.CurrentTypeName)
+					if (IconBarMargin.CurrentType == null || bm.TypeName != IconBarMargin.CurrentType.FullName)
 						continue;
 					
 					int line = bm.LineNumber;
@@ -139,7 +131,9 @@ namespace ILSpy.Debugger.AvalonEdit
 		{
 			BookmarkBase result = null;
 			foreach (BookmarkBase bm in BookmarkManager.Bookmarks) {
-				if (bm.LineNumber == line && bm.TypeName == IconBarMargin.CurrentTypeName) {
+				if (bm.LineNumber == line &&
+				    IconBarMargin.CurrentType != null &&
+				    bm.TypeName == IconBarMargin.CurrentType.FullName) {
 					if (result == null || bm.ZOrder > result.ZOrder)
 						result = bm;
 				}
@@ -225,17 +219,17 @@ namespace ILSpy.Debugger.AvalonEdit
 				IBookmark bm = GetBookmarkFromLine(line);
 				if (bm != null) {
 					bm.MouseUp(e);
-					if (!string.IsNullOrEmpty(IconBarMargin.CurrentTypeName)) {
-						DebuggerService.ToggleBreakpointAt(IconBarMargin.CurrentTypeName, line);
+					if (IconBarMargin.CurrentType != null) {
+						DebuggerService.ToggleBreakpointAt(IconBarMargin.CurrentType.FullName, line);
 					}
 					InvalidateVisual();
 					if (e.Handled)
 						return;
 				}
 				if (e.ChangedButton == MouseButton.Left && TextView != null) {
-					if (!string.IsNullOrEmpty(IconBarMargin.CurrentTypeName)) {
+					if (IconBarMargin.CurrentType != null) {
 						// no bookmark on the line: create a new breakpoint
-						DebuggerService.ToggleBreakpointAt(IconBarMargin.CurrentTypeName, line);
+						DebuggerService.ToggleBreakpointAt(IconBarMargin.CurrentType.FullName, line);
 					}
 				}
 				InvalidateVisual();

Debugger/ILSpy.Debugger/Bookmarks/CurrentLineBookmark.cs

@@ -17,40 +17,19 @@ namespace ILSpy.Debugger.Bookmarks
 		static int endLine;
 		static int endColumn;
 		
-//		public static void SetPosition(IViewContent viewContent,  int makerStartLine, int makerStartColumn, int makerEndLine, int makerEndColumn)
-//		{
-//			ITextEditorProvider tecp = viewContent as ITextEditorProvider;
-//			if (tecp != null)
-//				SetPosition(tecp.TextEditor.FileName, tecp.TextEditor.Document, makerStartLine, makerStartColumn, makerEndLine, makerEndColumn);
-//			else
-//				Remove();
-//		}
-//		
-//		public static void SetPosition(FileName fileName, IDocument document, int makerStartLine, int makerStartColumn, int makerEndLine, int makerEndColumn)
-//		{
-//			Remove();
-//			
-//			startLine   = makerStartLine;
-//			startColumn = makerStartColumn;
-//			endLine     = makerEndLine;
-//			endColumn   = makerEndColumn;
-//			
-//			if (startLine < 1 || startLine > document.TotalNumberOfLines)
-//				return;
-//			if (endLine < 1 || endLine > document.TotalNumberOfLines) {
-//				endLine = startLine;
-//				endColumn = int.MaxValue;
-//			}
-//			if (startColumn < 1)
-//				startColumn = 1;
-//			
-//			IDocumentLine line = document.GetLine(startLine);
-//			if (endColumn < 1 || endColumn > line.Length)
-//				endColumn = line.Length;
-//			instance = new CurrentLineBookmark(fileName, new Location(startColumn, startLine));
-//			BookmarkManager.AddMark(instance);
-//		}
-//		
+		public static void SetPosition(string typeName, int makerStartLine, int makerStartColumn, int makerEndLine, int makerEndColumn)
+		{
+			Remove();
+			
+			startLine   = makerStartLine;
+			startColumn = makerStartColumn;
+			endLine     = makerEndLine;
+			endColumn   = makerEndColumn;
+			
+			instance = new CurrentLineBookmark(typeName, new Location(startColumn, startLine));
+			BookmarkManager.AddMark(instance);
+		}
+		
 		public static void Remove()
 		{
 			if (instance != null) {
@@ -60,9 +39,7 @@ namespace ILSpy.Debugger.Bookmarks
 		}
 		
 		public override bool CanToggle {
-			get {
-				return false;
-			}
+			get { return false; }
 		}
 		
 		public override int ZOrder {
@@ -79,7 +56,7 @@ namespace ILSpy.Debugger.Bookmarks
 		}
 		
 		public override bool CanDragDrop {
-			get { return true; }
+			get { return false; }
 		}
 		
 		public override void Drop(int lineNumber)

Debugger/ILSpy.Debugger/ILSpy.Debugger.csproj

@@ -108,6 +108,14 @@
       <Project>{3A9AE6AA-BC07-4A2F-972C-581E3AE2F195}</Project>
       <Name>NRefactory</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\ICSharpCode.Decompiler\ICSharpCode.Decompiler.csproj">
+      <Project>{984CC812-9470-4A13-AFF9-CC44068D666C}</Project>
+      <Name>ICSharpCode.Decompiler</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\..\Mono.Cecil\Mono.Cecil.csproj">
+      <Project>{D68133BD-1E63-496E-9EDE-4FBDBF77B486}</Project>
+      <Name>Mono.Cecil</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Debugger.Core\Debugger.Core.csproj">
       <Project>{1D18D788-F7EE-4585-A23B-34DC8EC63CB8}</Project>
       <Name>Debugger.Core</Name>

Debugger/ILSpy.Debugger/Services/Debugger/DebuggerService.cs

@@ -182,12 +182,9 @@ namespace ILSpy.Debugger.Services
 			CurrentLineBookmark.Remove();
 		}
 		
-		public static void JumpToCurrentLine(string SourceFullFilename, int StartLine, int StartColumn, int EndLine, int EndColumn)
+		public static void JumpToCurrentLine(string typeName, int startLine, int startColumn, int endLine, int endColumn)
 		{
-//			IViewContent viewContent = FileService.OpenFile(SourceFullFilename);
-//			if (viewContent is ITextEditorProvider)
-//				((ITextEditorProvider)viewContent).TextEditor.JumpTo(StartLine, StartColumn);
-//			CurrentLineBookmark.SetPosition(viewContent, StartLine, StartColumn, EndLine, EndColumn);
+			CurrentLineBookmark.SetPosition(typeName, startLine, startColumn, endLine, endColumn);
 		}
 		
 		#region Tool tips

Debugger/ILSpy.Debugger/Services/Debugger/WindowsDebugger.cs

@@ -9,12 +9,14 @@ using System.Windows.Media;
 
 using Debugger;
 using Debugger.Interop.CorPublish;
+using ICSharpCode.Decompiler.Disassembler;
 using ICSharpCode.NRefactory;
 using ICSharpCode.NRefactory.Ast;
 using ICSharpCode.NRefactory.Visitors;
 using ILSpy.Debugger.Bookmarks;
 using ILSpy.Debugger.Models.TreeModel;
 using ILSpy.Debugger.Services.Debugger;
+using Mono.Cecil.Cil;
 using CorDbg = Debugger;
 using Process = Debugger.Process;
 
@@ -486,7 +488,13 @@ namespace ILSpy.Debugger.Services
 		
 		void AddBreakpoint(BreakpointBookmark bookmark)
 		{
-			Breakpoint breakpoint = debugger.Breakpoints.Add(bookmark.TypeName, null, bookmark.LineNumber, 0, bookmark.IsEnabled);
+			uint token;
+			ILCodeMapping map = CodeMappings.GetInstructionByTypeAndLine(bookmark.TypeName, bookmark.LineNumber, out token);
+			
+			if (map != null) {
+				Breakpoint breakpoint = new ILBreakpoint(debugger, bookmark.LineNumber, token, map.ILInstruction.Offset , bookmark.IsEnabled);
+				debugger.Breakpoints.Add(breakpoint);
+				
 //			Action setBookmarkColor = delegate {
 //				if (debugger.Processes.Count == 0) {
 //					bookmark.IsHealthy = true;
@@ -574,6 +582,7 @@ namespace ILSpy.Debugger.Services
 				breakpoint.Hit += bp_debugger_BreakpointHit;
 				BookmarkManager.Removed += bp_bookmarkManager_Removed;
 			}
+		}
 		
 		bool Evaluate(string code, string language)
 		{
@@ -711,10 +720,15 @@ namespace ILSpy.Debugger.Services
 		public void JumpToCurrentLine()
 		{
 			DebuggerService.RemoveCurrentLineMarker();
-			if (debuggedProcess != null) {
-				SourcecodeSegment nextStatement = debuggedProcess.NextStatement;
-				if (nextStatement != null) {
-					DebuggerService.JumpToCurrentLine(nextStatement.Filename, nextStatement.StartLine, nextStatement.StartColumn, nextStatement.EndLine, nextStatement.EndColumn);
+			
+			if (debuggedProcess != null && debuggedProcess.SelectedStackFrame != null) {
+				uint token = (uint)debuggedProcess.SelectedStackFrame.MethodInfo.MetadataToken;
+				int ilOffset = debuggedProcess.SelectedStackFrame.IP;
+				int line;
+				string typeName;
+				CodeMappings.GetSourceCodeFromMetadataTokenAndOffset(token, ilOffset, out typeName, out line);
+				if (typeName != null) {
+					DebuggerService.JumpToCurrentLine(typeName, line, 0, line, 0);
 				}
 			}
 		}

Debugger/ILSpy.Debugger/UI/AttachToProcessWindow.xaml

@@ -16,6 +16,7 @@
 				Height="0.17*" />
 		</Grid.RowDefinitions>
 		<ListView
+			MouseDoubleClick="RunningProcesses_MouseDoubleClick"
 			x:Name="RunningProcesses">
 			<ListView.View>
 				<GridView>

Debugger/ILSpy.Debugger/UI/AttachToProcessWindow.xaml.cs

@@ -85,12 +85,7 @@ namespace ILSpy.Debugger.UI
 			RunningProcesses.ItemsSource = list;
 		}
 		
-		void OnLoaded(object sender, RoutedEventArgs e)
-		{
-			RefreshProcessList();
-		}
-		
-		void AttachButton_Click(object sender, RoutedEventArgs e)
+		void Attach()
 		{
 			if (this.RunningProcesses.SelectedItem == null)
 				return;
@@ -101,6 +96,16 @@ namespace ILSpy.Debugger.UI
 			this.DialogResult = true;
 		}
 		
+		void OnLoaded(object sender, RoutedEventArgs e)
+		{
+			RefreshProcessList();
+		}
+		
+		void AttachButton_Click(object sender, RoutedEventArgs e)
+		{
+			Attach();
+		}
+		
 		void CancelButton_Click(object sender, RoutedEventArgs e)
 		{
 			this.Close();
@@ -110,5 +115,10 @@ namespace ILSpy.Debugger.UI
 		{
 			RefreshProcessList();
 		}
+		
+		void RunningProcesses_MouseDoubleClick(object sender, System.Windows.Input.MouseButtonEventArgs e)
+		{
+			Attach();
+		}
 	}
 }

ICSharpCode.Decompiler/Disassembler/CodeMappings.cs

@@ -17,7 +17,7 @@ namespace ICSharpCode.Decompiler.Disassembler
 	{
 		public string TypeName { get; set; }
 		
-		public int MetadataToken { get; set; }
+		public uint MetadataToken { get; set; }
 		
 		public List<ILCodeMapping> MethodCodeMappings { get; set; }
 		
@@ -63,4 +63,62 @@ namespace ICSharpCode.Decompiler.Disassembler
 			return -1;
 		}
 	}
+	
+	public static class CodeMappings
+	{
+		static Dictionary<string, List<MethodMapping>> ilCodeMappings = new Dictionary<string, List<MethodMapping>>();
+		
+		/// <summary>
+		/// Stores the source codes mappings: IL &lt;-&gt; editor lines
+		/// </summary>
+		public static Dictionary<string, List<MethodMapping>> ILSourceCodeMappings {
+			get { return ilCodeMappings; }
+			set { ilCodeMappings = value; }
+		}
+		
+		public static ILCodeMapping GetInstructionByTypeAndLine(string typeName, int lineNumber, out uint metadataToken)
+		{
+			if (!ilCodeMappings.ContainsKey(typeName)) {
+				metadataToken = 0;
+				return null;
+			}
+			
+			if (lineNumber <= 0) {
+				metadataToken = 0;
+				return null;
+			}
+			
+			var methodMappings = ilCodeMappings[typeName];
+			foreach (var maping in methodMappings) {
+				var ilMap = maping.MethodCodeMappings.Find(m => m.SourceCodeLine == lineNumber);
+				if (ilMap != null) {
+					metadataToken = maping.MetadataToken;
+					return ilMap;
+				}
+			}
+			
+			metadataToken = 0;
+			return null;
+		}
+		
+		public static void GetSourceCodeFromMetadataTokenAndOffset(uint token, int ilOffset, out string typeName, out int line)
+		{
+			typeName = null;
+			line = 0;
+			
+			foreach (var typename in ilCodeMappings.Keys) {
+				var mapping = ilCodeMappings[typename].Find(m => m.MetadataToken == token);
+				if (mapping == null)
+					continue;
+				
+				var ilCodeMapping = mapping.MethodCodeMappings.Find(cm => cm.ILInstruction.Offset == ilOffset);
+				if (ilCodeMapping == null)
+					continue;
+				
+				typeName = typename;
+				line = ilCodeMapping.SourceCodeLine;
+				break;
+			}
+		}
+	}
 }

ICSharpCode.Decompiler/Disassembler/MethodBodyDisassembler.cs

@@ -49,11 +49,11 @@ namespace ICSharpCode.Decompiler.Disassembler
 		{
 			// create mappings
 			MethodMapping currentMethodMapping = null;
-			if (ReflectionDisassembler.ILSourceCodeMappings.ContainsKey(body.Method.DeclaringType.FullName)) {
-				var mapping = ReflectionDisassembler.ILSourceCodeMappings[body.Method.DeclaringType.FullName];
-				if (mapping.Find(map => map.MetadataToken == body.Method.MetadataToken.ToInt32()) == null) {
+			if (CodeMappings.ILSourceCodeMappings.ContainsKey(body.Method.DeclaringType.FullName)) {
+				var mapping = CodeMappings.ILSourceCodeMappings[body.Method.DeclaringType.FullName];
+				if (mapping.Find(map => (int)map.MetadataToken == body.Method.MetadataToken.ToInt32()) == null) {
 					currentMethodMapping = new MethodMapping() {
-						MetadataToken = body.Method.MetadataToken.ToInt32(),
+						MetadataToken = (uint)body.Method.MetadataToken.ToInt32(),
 						TypeName = body.Method.DeclaringType.FullName,
 						MethodCodeMappings = new List<ILCodeMapping>()
 					};

ICSharpCode.Decompiler/Disassembler/ReflectionDisassembler.cs

@@ -36,16 +36,6 @@ namespace ICSharpCode.Decompiler.Disassembler
 		bool isInType; // whether we are currently disassembling a whole type (-> defaultCollapsed for foldings)
 		MethodBodyDisassembler methodBodyDisassembler;
 		
-		static Dictionary<string, List<MethodMapping>> ilCodeMappings = new Dictionary<string, List<MethodMapping>>();
-		
-		/// <summary>
-		/// Stores the source codes mappings: IL &lt;-&gt; editor lines
-		/// </summary>
-		public static Dictionary<string, List<MethodMapping>> ILSourceCodeMappings {
-			get { return ilCodeMappings; }
-			set { ilCodeMappings = value; }
-		}
-		
 		public ReflectionDisassembler(ITextOutput output, bool detectControlStructure, CancellationToken cancellationToken)
 		{
 			if (output == null)
@@ -112,8 +102,8 @@ namespace ICSharpCode.Decompiler.Disassembler
 		void DisassembleMethodInternal(MethodDefinition method)
 		{
 			// create mappings for types that were not disassebled
-			if (!ilCodeMappings.ContainsKey(method.DeclaringType.FullName)) {
-				ilCodeMappings.Add(method.DeclaringType.FullName, new List<MethodMapping>());
+			if (!CodeMappings.ILSourceCodeMappings.ContainsKey(method.DeclaringType.FullName)) {
+				CodeMappings.ILSourceCodeMappings.Add(method.DeclaringType.FullName, new List<MethodMapping>());
 			}
 			
 			//    .method public hidebysig  specialname

ILSpy/Commands/RoutedUICommands.cs

@@ -27,10 +27,22 @@ namespace ICSharpCode.ILSpy.Commands
 		{
 			AttachToProcess = new RoutedUICommand("Attach to running process...", "AttachToProcess", typeof(RoutedUICommands));
 			DetachFromProcess = new RoutedUICommand("Detach from process...", "DetachFromProcess", typeof(RoutedUICommands));
+			ContinueDebugging = new RoutedUICommand("Continue debugging", "ContinueDebugging", typeof(RoutedUICommands));
+			StepInto = new RoutedUICommand("Step into", "StepInto", typeof(RoutedUICommands));
+			StepOver = new RoutedUICommand("Step over", "StepOver", typeof(RoutedUICommands));
+			StepOut = new RoutedUICommand("Step out", "StepOut", typeof(RoutedUICommands));
 		}
 		
 		public static RoutedUICommand AttachToProcess { get; private set; }
 		
 		public static RoutedUICommand DetachFromProcess { get; private set; }
+		
+		public static RoutedUICommand ContinueDebugging { get; private set; }
+		
+		public static RoutedUICommand StepInto { get; private set; }
+		
+		public static RoutedUICommand StepOver { get; private set; }
+		
+		public static RoutedUICommand StepOut { get; private set; }
 	}
 }

ILSpy/ILSpy.csproj

@@ -115,6 +115,10 @@
     <Resource Include="Images\Delete.png" />
     <Resource Include="Images\bug.png" />
     <None Include="app.config" />
+    <Resource Include="Images\ContinueDebugging.png" />
+    <Resource Include="Images\StepInto.png" />
+    <Resource Include="Images\StepOut.png" />
+    <Resource Include="Images\StepOver.png" />
     <None Include="Properties\AssemblyInfo.template.cs" />
     <Compile Include="Properties\WPFAssemblyInfo.cs" />
     <Compile Include="MainWindow.xaml.cs">

ILSpy/MainWindow.xaml

@@ -27,6 +27,18 @@
 		<CommandBinding
 			Command="routedCommands:RoutedUICommands.DetachFromProcess"
 			Executed="DetachFromProcessExecuted" />
+		<CommandBinding
+			Command="routedCommands:RoutedUICommands.ContinueDebugging"
+			Executed="ContinueDebuggingExecuted" />
+		<CommandBinding
+			Command="routedCommands:RoutedUICommands.StepInto"
+			Executed="StepIntoExecuted" />
+		<CommandBinding
+			Command="routedCommands:RoutedUICommands.StepOver"
+			Executed="StepOverExecuted" />
+		<CommandBinding
+			Command="routedCommands:RoutedUICommands.StepOut"
+			Executed="StepOutExecuted" />
 		<CommandBinding
 			Command="Open"
 			Executed="OpenCommandExecuted" />
@@ -71,7 +83,29 @@
 						<Image Width="16" Height="16" Source="Images/bug.png" />
 					</MenuItem.Icon>
 				</MenuItem>
-				<MenuItem x:Name="DetachMenuItem" IsEnabled="False" Header="Detach from running application" Command="routedCommands:RoutedUICommands.DetachFromProcess"/>
+				<MenuItem x:Name="ContinueDebuggingMenuItem" IsEnabled="False" Header="Continue debugging" InputGestureText="F5" Command="routedCommands:RoutedUICommands.ContinueDebugging">
+					<MenuItem.Icon>
+						<Image Width="16" Height="16" Source="Images/ContinueDebugging.png" />
+					</MenuItem.Icon>
+				</MenuItem>
+				<MenuItem x:Name="StepIntoMenuItem" IsEnabled="False" Header="Step into" InputGestureText="F11" Command="routedCommands:RoutedUICommands.StepInto">
+					<MenuItem.Icon>
+						<Image Width="16" Height="16" Source="Images/StepInto.png" />
+					</MenuItem.Icon>
+				</MenuItem>
+				<MenuItem x:Name="StepOverMenuItem" IsEnabled="False" Header="Step over" InputGestureText="F10" Command="routedCommands:RoutedUICommands.StepOver">
+					<MenuItem.Icon>
+						<Image Width="16" Height="16" Source="Images/StepOver.png" />
+					</MenuItem.Icon>
+				</MenuItem>
+				<MenuItem x:Name="StepOutMenuItem" IsEnabled="False" Header="Step out" Command="routedCommands:RoutedUICommands.StepOut">
+					<MenuItem.Icon>
+						<Image Width="16" Height="16" Source="Images/StepOut.png" />
+					</MenuItem.Icon>
+				</MenuItem>
+				<MenuItem x:Name="DetachMenuItem" IsEnabled="False"
+				          Header="Detach from running application" 
+				          Command="routedCommands:RoutedUICommands.DetachFromProcess"/>
 			</MenuItem>
 			<MenuItem Header="_Help">
 				<MenuItem Header="_About" Click="AboutClick" />

ILSpy/MainWindow.xaml.cs

@@ -322,6 +322,8 @@ namespace ICSharpCode.ILSpy
 				treeView.ScrollIntoView(lastNode);
 		}
 		
+		#region Debugger commands
+		
 		void RefreshCommandExecuted(object sender, ExecutedRoutedEventArgs e)
 		{
 			e.Handled = true;
@@ -332,22 +334,83 @@ namespace ICSharpCode.ILSpy
 		
 		void AttachToProcessExecuted(object sender, ExecutedRoutedEventArgs e)
 		{
+			if (!AttachToProcessWindow.Debugger.IsDebugging) {
 				var window = new AttachToProcessWindow();
 				window.Owner = this;
 				if (window.ShowDialog() == true)
 				{
 					AttachMenuItem.IsEnabled = AttachButton.IsEnabled = false;
+					ContinueDebuggingMenuItem.IsEnabled =
+						StepIntoMenuItem.IsEnabled =
+						StepOverMenuItem.IsEnabled =
+						StepOutMenuItem.IsEnabled =
 						DetachMenuItem.IsEnabled = true;
 				}
 			}
+		}
 		
 		void DetachFromProcessExecuted(object sender, ExecutedRoutedEventArgs e)
 		{
+			if (AttachToProcessWindow.Debugger.IsDebugging){
 				AttachToProcessWindow.Debugger.Detach();
 				
 				AttachMenuItem.IsEnabled = AttachButton.IsEnabled = true;
+				ContinueDebuggingMenuItem.IsEnabled =
+					StepIntoMenuItem.IsEnabled =
+					StepOverMenuItem.IsEnabled =
+					StepOutMenuItem.IsEnabled =
 					DetachMenuItem.IsEnabled = false;
 			}
+		}
+		
+		void ContinueDebuggingExecuted(object sender, ExecutedRoutedEventArgs e)
+		{
+			if (AttachToProcessWindow.Debugger.IsDebugging)
+				AttachToProcessWindow.Debugger.Continue();
+		}
+		
+		void StepIntoExecuted(object sender, ExecutedRoutedEventArgs e)
+		{
+			if (AttachToProcessWindow.Debugger.IsDebugging)
+				AttachToProcessWindow.Debugger.StepInto();
+		}
+		
+		void StepOverExecuted(object sender, ExecutedRoutedEventArgs e)
+		{
+			if (AttachToProcessWindow.Debugger.IsDebugging)
+				AttachToProcessWindow.Debugger.StepOver();
+		}
+		
+		void StepOutExecuted(object sender, ExecutedRoutedEventArgs e)
+		{
+			if (AttachToProcessWindow.Debugger.IsDebugging)
+				AttachToProcessWindow.Debugger.StepOut();
+		}
+		
+		protected override void OnKeyUp(KeyEventArgs e)
+		{
+			switch (e.Key) {
+				case Key.F5:
+					ContinueDebuggingExecuted(null, null);
+					e.Handled = true;
+					break;
+				case Key.System:
+					StepOverExecuted(null, null);
+					e.Handled = true;
+					break;
+				case Key.F11:
+					StepIntoExecuted(null, null);
+					e.Handled = true;
+					break;
+				default:
+					// do nothing
+					break;
+			}
+			
+			base.OnKeyUp(e);
+		}
+		
+		#endregion
 		
 		void ExitClick(object sender, RoutedEventArgs e)
 		{

ILSpy/TextView/DecompilerTextView.cs

@@ -80,6 +80,16 @@ namespace ICSharpCode.ILSpy.TextView
 			// add margin
 			iconMargin = new IconBarMargin();
 			textEditor.TextArea.LeftMargins.Add(iconMargin);
+			textEditor.TextArea.TextView.VisualLinesChanged += (s, e) => iconMargin.InvalidateVisual();
+			BookmarkManager.Added += BookmarkManager_Added;
+			BookmarkManager.Removed += (s, e) => iconMargin.InvalidateVisual();
+		}
+
+		void BookmarkManager_Added(object sender, BookmarkEventArgs e)
+		{
+			if (e.Bookmark is CurrentLineBookmark) {
+				iconMargin.InvalidateVisual();
+			}
 		}
 		#endregion
 		
@@ -196,7 +206,7 @@ namespace ICSharpCode.ILSpy.TextView
 		/// </summary>
 		public void Decompile(ILSpy.Language language, IEnumerable<ILSpyTreeNodeBase> treeNodes, DecompilationOptions options)
 		{
-			IconBarMargin.CurrentTypeName = string.Empty;
+			IconBarMargin.CurrentType = null;
 			// Some actions like loading an assembly list cause several selection changes in the tree view,
 			// and each of those will start a decompilation action.
 			bool isDecompilationScheduled = this.nextDecompilationRun != null;

ILSpy/TreeNodes/TypeTreeNode.cs

@@ -122,7 +122,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		
 		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
 		{
-			IconBarMargin.CurrentTypeName = type.FullName;
+			IconBarMargin.CurrentType = type;
 			language.DecompileType(type, output, options);
 		}