implement GetMethodsFromDocumentPosition and set breakpoints in all methods (lambdas, etc.) in that location

src/AddIns/Debugger/Debugger.Core/Breakpoint.cs

@@ -70,8 +70,7 @@ namespace Debugger
 		public void SetBreakpoint(Module module)
 		{
 			foreach(var symbolSource in module.Process.Debugger.SymbolSources) {
-				var seq = symbolSource.GetSequencePoint(module, this.FileName, this.Line, this.Column);
-				if (seq != null) {
+				foreach (var seq in symbolSource.GetSequencePoints(module, this.FileName, this.Line, this.Column)) {
 					ICorDebugFunction corFunction = module.CorModule.GetFunctionFromToken(seq.MethodDefToken);
 					ICorDebugFunctionBreakpoint corBreakpoint = corFunction.GetILCode().CreateBreakpoint((uint)seq.ILOffset);
 					corBreakpoint.Activate(enabled ? 1 : 0);

src/AddIns/Debugger/Debugger.Core/Interop/CorSym.cs

@@ -77,7 +77,7 @@ namespace Debugger.Interop.CorSym
         public virtual extern ISymUnmanagedMethod __GetMethodFromDocumentPosition([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedDocument document, [In] uint line, [In] uint column);
 
         [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType=MethodCodeType.Runtime)]
-        public virtual extern void __GetMethodsFromDocumentPosition([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedDocument document, [In] uint line, [In] uint column, [In] uint cMethod, out uint pcMethod, [Out] IntPtr pRetVal);
+        public virtual extern void __GetMethodsFromDocumentPosition([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedDocument document, [In] uint line, [In] uint column, [In] uint cMethod, out uint pcMethod, [Out, MarshalAs(UnmanagedType.LPArray)] ISymUnmanagedMethod[] pRetVal);
 
         [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType=MethodCodeType.Runtime)]
         public virtual extern void __GetMethodVersion([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedMethod pMethod, out int version);
@@ -332,7 +332,7 @@ namespace Debugger.Interop.CorSym
         [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType=MethodCodeType.Runtime)]
         void __GetSymbolStoreFileName([In] uint cchName, out uint pcchName, [Out] IntPtr szName);
         [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType=MethodCodeType.Runtime)]
-        void __GetMethodsFromDocumentPosition([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedDocument document, [In] uint line, [In] uint column, [In] uint cMethod, out uint pcMethod, [Out] IntPtr pRetVal);
+        void __GetMethodsFromDocumentPosition([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedDocument document, [In] uint line, [In] uint column, [In] uint cMethod, out uint pcMethod, [Out, MarshalAs(UnmanagedType.LPArray)] ISymUnmanagedMethod[] pRetVal);
         [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType=MethodCodeType.Runtime)]
         void __GetDocumentVersion([In, MarshalAs(UnmanagedType.Interface)] ISymUnmanagedDocument pDoc, out int version, out int pbCurrent);
         [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType=MethodCodeType.Runtime)]

src/AddIns/Debugger/Debugger.Core/Interop/CorSymExtensionMethods.generated.cs

@@ -67,9 +67,14 @@ namespace Debugger.Interop.CorSym
 			return returnValue;
 		}
 		
-		public static void GetMethodsFromDocumentPosition(this CorSymReader_SxSClass instance, ISymUnmanagedDocument document, uint line, uint column, uint cMethod, out uint pcMethod, IntPtr pRetVal)
+		public static ISymUnmanagedMethod[] GetMethodsFromDocumentPosition(this CorSymReader_SxSClass instance, ISymUnmanagedDocument document, uint line, uint column)
 		{
-			instance.__GetMethodsFromDocumentPosition(document, line, column, cMethod, out pcMethod, pRetVal);
+			uint count;
+			instance.__GetMethodsFromDocumentPosition(document, line, column, 0, out count, new ISymUnmanagedMethod[0]);
+			var methods = new ISymUnmanagedMethod[count];
+			instance.__GetMethodsFromDocumentPosition(document, line, column, count, out count, methods);
+			ProcessOutParameter(methods);
+			return methods;
 		}
 		
 		public static int GetMethodVersion(this CorSymReader_SxSClass instance, ISymUnmanagedMethod pMethod)
@@ -485,9 +490,14 @@ namespace Debugger.Interop.CorSym
 			instance.__GetSymbolStoreFileName(cchName, out pcchName, szName);
 		}
 		
-		public static void GetMethodsFromDocumentPosition(this ISymUnmanagedReader instance, ISymUnmanagedDocument document, uint line, uint column, uint cMethod, out uint pcMethod, IntPtr pRetVal)
+		public static ISymUnmanagedMethod[] GetMethodsFromDocumentPosition(this ISymUnmanagedReader instance, ISymUnmanagedDocument document, uint line, uint column)
 		{
-			instance.__GetMethodsFromDocumentPosition(document, line, column, cMethod, out pcMethod, pRetVal);
+			uint count;
+			instance.__GetMethodsFromDocumentPosition(document, line, column, 0, out count, new ISymUnmanagedMethod[0]);
+			var methods = new ISymUnmanagedMethod[count];
+			instance.__GetMethodsFromDocumentPosition(document, line, column, count, out count, methods);
+			ProcessOutParameter(methods);
+			return methods;
 		}
 		
 		public static void GetDocumentVersion(this ISymUnmanagedReader instance, ISymUnmanagedDocument pDoc, out int version, out int pbCurrent)

src/AddIns/Debugger/Debugger.Core/PdbSymbolSource.cs

@@ -72,9 +72,9 @@ namespace Debugger
 		/// <summary> Find sequence point by IL offset </summary>
 		SequencePoint GetSequencePoint(IMethod method, int iloffset);
 		
-		/// <summary> Find sequence point by source code location </summary>
+		/// <summary> Find sequence points by source code location. Might find multiple methods at one location (lambda expressions, etc.) </summary>
 		/// <remarks> Only source files corresponding to the given module are searched </remarks>
-		SequencePoint GetSequencePoint(Module module, string filename, int line, int column);
+		IEnumerable<SequencePoint> GetSequencePoints(Module module, string filename, int line, int column);
 		
 		/// <summary> Get IL ranges that should be always stepped over by the debugger </summary>
 		/// <remarks> This is used for compiler generated code </remarks>
@@ -190,14 +190,14 @@ namespace Debugger
 			return sequencePoint;
 		}
 		
-		public SequencePoint GetSequencePoint(Module module, string filename, int line, int column)
+		public IEnumerable<SequencePoint> GetSequencePoints(Module module, string filename, int line, int column)
 		{
 			// Do not use ISymUnmanagedReader.GetDocument!  It is broken if two files have the same name
 			// Do not use ISymUnmanagedMethod.GetOffset!  It sometimes returns negative offset
 			
 			ISymUnmanagedReader symReader = module.SymReader;
 			if (symReader == null)
-				return null; // No symbols
+				yield break; // No symbols
 			
 			// Find ISymUnmanagedDocument which excactly matches the filename.
 			var symDoc = module.SymDocuments.FirstOrDefault(d => string.Equals(filename, d.GetURL(), StringComparison.OrdinalIgnoreCase));
@@ -205,26 +205,31 @@ namespace Debugger
 			// Find the file even if the symbol is relative or if the file was moved
 			var symDocs = module.SymDocuments.Where(d => string.Equals(Path.GetFileName(filename), Path.GetFileName(d.GetURL()), StringComparison.OrdinalIgnoreCase));
 			symDoc = symDoc ?? symDocs.FirstOrDefault(d => string.Equals(GetSourceCodePath(module.Process, d.GetURL()), filename, StringComparison.OrdinalIgnoreCase));
-			if (symDoc == null) return null; // Document not found
+			if (symDoc == null) yield break; // Document not found
 			
-			ISymUnmanagedMethod symMethod;
+			ISymUnmanagedMethod symMethod2;
+			ISymUnmanagedMethod[] symMethods;
 			try {
 				uint validLine = symDoc.FindClosestLine((uint)line);
-				symMethod = symReader.GetMethodFromDocumentPosition(symDoc, (uint)validLine, (uint)column);
+				symMethods = symReader.GetMethodsFromDocumentPosition(symDoc, validLine, (uint)column);
+				symMethod2 = symReader.GetMethodFromDocumentPosition(symDoc, (uint)validLine, (uint)column);
 			} catch {
-				return null; //Not found
+				yield break; //Not found
 			}
 			
-			var corFunction = module.CorModule.GetFunctionFromToken(symMethod.GetToken());
-			int codesize = (int)corFunction.GetILCode().GetSize();
-			var seqPoints = symMethod.GetSequencePoints(codesize).Where(s => s.StartLine != 0xFEEFEE);
-			SequencePoint seqPoint = null;
-			if (column != 0) {
-				seqPoint = seqPoints.FirstOrDefault(s => (s.StartLine < line || (s.StartLine == line && s.StartColumn <= column)) &&
-				                                    (line < s.EndLine || (line == s.EndLine && column <= s.EndColumn)));
+			foreach (ISymUnmanagedMethod symMethod in symMethods) {
+				var corFunction = module.CorModule.GetFunctionFromToken(symMethod.GetToken());
+				int codesize = (int)corFunction.GetILCode().GetSize();
+				var seqPoints = symMethod.GetSequencePoints(codesize).Where(s => s.StartLine != 0xFEEFEE);
+				SequencePoint seqPoint = null;
+				if (column != 0) {
+					seqPoint = seqPoints.FirstOrDefault(s => (s.StartLine < line || (s.StartLine == line && s.StartColumn <= column)) &&
+					                                    (line < s.EndLine || (line == s.EndLine && column <= s.EndColumn)));
+				}
+				seqPoint = seqPoint ?? seqPoints.FirstOrDefault(s => line <= s.StartLine);
+				if (seqPoint != null)
+					yield return seqPoint;
 			}
-			seqPoint = seqPoint ?? seqPoints.FirstOrDefault(s => line <= s.StartLine);
-			return seqPoint;
 		}
 		
 		public IEnumerable<ILRange> GetIgnoredILRanges(IMethod method)

src/AddIns/Debugger/Debugger.Core/Process.cs

@@ -436,8 +436,7 @@ namespace Debugger
 			foreach(var symbolSource in this.Debugger.SymbolSources) {
 				foreach(Module module in this.Modules) {
 					// Note the we might get multiple matches
-					SequencePoint seq = symbolSource.GetSequencePoint(module, fileName, line, column);
-					if (seq != null) {
+					foreach (SequencePoint seq in symbolSource.GetSequencePoints(module, fileName, line, column)) {
 						ICorDebugFunction corFunction = module.CorModule.GetFunctionFromToken(seq.MethodDefToken);
 						ICorDebugFunctionBreakpoint corBreakpoint = corFunction.GetILCode().CreateBreakpoint((uint)seq.ILOffset);
 						corBreakpoint.Activate(1);

src/AddIns/Debugger/Debugger.Core/StackFrame.cs

@@ -198,21 +198,22 @@ namespace Debugger
 			this.Process.AssertPaused();
 			
 			foreach(var symbolSource in this.Process.Debugger.SymbolSources) {
-				var seq = symbolSource.GetSequencePoint(this.Module, filename, line, column);
-				if (seq != null && seq.MethodDefToken == this.MethodInfo.GetMetadataToken()) {
-					try {
-						if (dryRun) {
-							CorILFrame.CanSetIP((uint)seq.ILOffset);
-						} else {
-							CorILFrame.SetIP((uint)seq.ILOffset);
-							// Invalidates all frames and chains for the current thread
-							this.Process.NotifyResumed(DebuggeeStateAction.Keep);
-							this.Process.NotifyPaused();
+				foreach (var seq in symbolSource.GetSequencePoints(this.Module, filename, line, column)) {
+					if (seq.MethodDefToken == this.MethodInfo.GetMetadataToken()) {
+						try {
+							if (dryRun) {
+								CorILFrame.CanSetIP((uint)seq.ILOffset);
+							} else {
+								CorILFrame.SetIP((uint)seq.ILOffset);
+								// Invalidates all frames and chains for the current thread
+								this.Process.NotifyResumed(DebuggeeStateAction.Keep);
+								this.Process.NotifyPaused();
+							}
+						} catch {
+							return false;
 						}
-					} catch {
-						return false;
+						return true;
 					}
-					return true;
 				}
 			}
 			return false;

src/AddIns/DisplayBindings/ILSpyAddIn/ILSpySymbolSource.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
@@ -57,13 +58,13 @@ namespace ICSharpCode.ILSpyAddIn
 			return null;
 		}
 		
-		public Debugger.SequencePoint GetSequencePoint(Module module, string filename, int line, int column)
+		public IEnumerable<Debugger.SequencePoint> GetSequencePoints(Module module, string filename, int line, int column)
 		{
 			var content = DecompiledViewContent.Get(new FileName(filename));
 			if (content == null)
-				return null;
+				yield break;
 			if (!FileUtility.IsEqualFileName(module.FullPath, content.AssemblyFile))
-				return null;
+				yield break;
 			
 			TextLocation loc = new TextLocation(line, column);
 			foreach(var symbols in content.DebugSymbols.Values.Where(s => s.StartLocation <= loc && loc <= s.EndLocation)) {
@@ -73,9 +74,8 @@ namespace ICSharpCode.ILSpyAddIn
 				if (seq == null)
 					seq = symbols.SequencePoints.FirstOrDefault(p => line <= p.StartLocation.Line);
 				if (seq != null)
-					return seq.ToDebugger(symbols, content.VirtualFileName);
+					yield return seq.ToDebugger(symbols, content.VirtualFileName);
 			}
-			return null;
 		}
 		
 		public IEnumerable<ILRange> GetIgnoredILRanges(IMethod method)