Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / AuthoringOM / Compiler / PDBReader.cs / 1305376 / PDBReader.cs
namespace System.Workflow.ComponentModel.Compiler { using System; using System.Runtime.InteropServices; internal sealed class PDBReader : IDisposable { #region Data Members private const string IMetaDataImportGuid = "7DAC8207-D3AE-4c75-9B67-92801A497D44"; private ISymUnmanagedReader symReader; #endregion #region Constructor and Dispose public PDBReader(string assemblyPath) { object metaDataImport = null; IMetaDataDispenser dispenser = null; try { Guid metaDataImportIID = new Guid(IMetaDataImportGuid); dispenser = (IMetaDataDispenser)(new MetaDataDispenser()); dispenser.OpenScope(assemblyPath, 0, ref metaDataImportIID, out metaDataImport); this.symReader = (ISymUnmanagedReader)(new CorSymReader_SxS()); this.symReader.Initialize(metaDataImport, assemblyPath, null, null); } finally { // Release COM objects so that files don't remain locked. if (metaDataImport != null) Marshal.ReleaseComObject(metaDataImport); if (dispenser != null) Marshal.ReleaseComObject(dispenser); } } ~PDBReader() { Dispose(); } void IDisposable.Dispose() { Dispose(); GC.SuppressFinalize(this); } private void Dispose() { if (this.symReader != null) { Marshal.ReleaseComObject(this.symReader); this.symReader = null; } } #endregion #region Public methods public void GetSourceLocationForOffset(uint methodDef, uint offset, out string fileLocation, out uint line, out uint column) { fileLocation = null; line = 0; column = 0; ISymUnmanagedMethod symMethod = null; ISymUnmanagedDocument[] documents = null; uint sequencePointCount = 0; try { symMethod = this.symReader.GetMethod(methodDef); sequencePointCount = symMethod.GetSequencePointCount(); documents = new ISymUnmanagedDocument[sequencePointCount]; uint[] offsets = new uint[sequencePointCount]; uint[] lines = new uint[sequencePointCount]; uint[] columns = new uint[sequencePointCount]; uint[] endLines = new uint[sequencePointCount]; uint[] endColumns = new uint[sequencePointCount]; symMethod.GetSequencePoints(sequencePointCount, out sequencePointCount, offsets, documents, lines, columns, endLines, endColumns); uint index = 1; for(; indexoffset) break; } index = index - 1; // Work Around: AkashS - The SymReader returns bad line-column data for unconditional branch // instructions. The line number is whacky and the column number is 0. Need to verify why this is so. // We just look for a good sequence point data, it should be close enough in the source code. while (columns[index] == 0 && index > 0) index--; while (index < sequencePointCount && columns[index] == 0) index++; // What more can we do? if (index >= sequencePointCount || columns[index] == 0) index = 0; // End Work around line = lines[index]; column = columns[index]; ISymUnmanagedDocument document = documents[index ]; uint urlLength = 261; string url = new string('\0', (int) urlLength); document.GetURL(urlLength, out urlLength, url); fileLocation = url.Substring(0, (int) urlLength - 1); } finally { // Release COM objects so that files don't remain locked. for (uint i = 0; i < sequencePointCount; i++) if (documents[i] != null) Marshal.ReleaseComObject(documents[i]); if (symMethod != null) Marshal.ReleaseComObject(symMethod); } } #endregion } #region Interop declarations // // Note: // These interop declaration are sufficient for our purposes of reading the symbol information from // the PDB. They are not complete otherwise! // [ComImport, Guid("0A3976C5-4529-4ef8-B0B0-42EED37082CD")] internal class CorSymReader_SxS { } [ ComImport, CoClass(typeof(CorSymReader_SxS)), InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("B4CE6286-2A6B-3712-A3B7-1EE1DAD467B5") ] internal interface ISymUnmanagedReader { // NYI. void GetDocument(); void GetDocuments(); void GetUserEntryPoint(); ISymUnmanagedMethod GetMethod(uint methodDef); // NYI. void GetMethodByVersion(); void GetVariables(); void GetGlobalVariables(); void GetMethodFromDocumentPosition(); void GetSymAttribute(); void GetNamespaces(); // Incomplete - We don't use the Stream void Initialize([In, MarshalAs(UnmanagedType.IUnknown)] object metaDataImport, [In, MarshalAs(UnmanagedType.LPWStr)] string pdbPath, [In, MarshalAs(UnmanagedType.LPWStr)] string searchPath, [In, MarshalAs(UnmanagedType.IUnknown)] object stream); // NYI. void UpdateSymbolStore(); void ReplaceSymbolStore(); void GetSymbolStoreFileName(); void GetMethodsFromDocumentPosition(); void GetDocumentVersion(); void GetMethodVersion(); } [ ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("B62B923C-B500-3158-A543-24F307A8B7E1") ] internal interface ISymUnmanagedMethod { uint GetToken(); uint GetSequencePointCount(); // Incomplete - Don't need to define ISymUnmanagedScope. object GetRootScope(); // Incomplete - Don't need to define ISymUnmanagedScope. object GetScopeFromOffset(uint offset); uint GetOffset([In, MarshalAs(UnmanagedType.IUnknown)] ISymUnmanagedDocument document, uint line, uint column); void GetRanges([In, MarshalAs(UnmanagedType.IUnknown)] ISymUnmanagedDocument document, uint line, uint column, uint rangeCount, [Out] out uint actualRangeCount, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] ranges); // NYI. void GetParameters(); // NYI. void GetNamespace(); void GetSourceStartEnd([In, Out, MarshalAs(UnmanagedType.LPArray)] ISymUnmanagedDocument[] documents, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] lines, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] columns, [Out, MarshalAs(UnmanagedType.Bool)] out bool positionsDefined); void GetSequencePoints(uint pointsCount, [Out] out uint actualPointsCount, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] offsets, [In, Out, MarshalAs(UnmanagedType.LPArray)] ISymUnmanagedDocument[] documents, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] lines, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] columns, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] endLines, [In, Out, MarshalAs(UnmanagedType.LPArray)] uint[] endColumns); } [ ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("40DE4037-7C81-3E1E-B022-AE1ABFF2CA08") ] internal interface ISymUnmanagedDocument { void GetURL(uint urlLength, [Out] out uint actualUrlLength, [In, Out, MarshalAs(UnmanagedType.LPWStr)] string url); // The rest are NYI. void GetDocumentType(); void GetLanguage(); void GetLanguageVendor(); void GetCheckSumAlgorithmId(); void GetCheckSum(); void FindClosestLine(); void HasEmbeddedSource(); void GetSourceLength(); void GetSourceRange(); } [ ComImport, Guid("E5CB7A31-7512-11d2-89CE-0080C792E5D8") ] internal class MetaDataDispenser { } [ ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), CoClass(typeof(MetaDataDispenser)), Guid("809C652E-7396-11d2-9771-00A0C9B4D50C") ] internal interface IMetaDataDispenser { // NYI void DefineScope(); // Incomplete - I don't really need to define IMetaDataImport. void OpenScope([In, MarshalAs(UnmanagedType.LPWStr)] string scope, uint flags, [In] ref Guid riid, [Out, MarshalAs(UnmanagedType.IUnknown)] out object unknown); // NYI void OpenScopeOnMemory(); } #endregion } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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