从PDB文件中检索本地变量名称
我正在尝试从IL字节码和PDB文件中检索源代码，我已经到了可以从IL生成源代码和reflection的地步我知道本地变量名的名称包含在pdb文件中。 我的问题是我怎样才能找到它？ 应该用什么库来处理pdb文件（如果有的话）或者我应该自己编写代码？ 我在哪里可以找到有关pdb文件格式的信息？ 目前在生成的源代码中我使用自动生成的局部变量值，但我想改变它，因为我相信如果您有pdb文件可以找回该信息。 我试图在谷歌上看，但我没有找到任何有用的信息。
在此先感谢您的回复;）
以下是使用System.Diagnostics.SymbolStore的类型从MethodInfo中读取局部变量名称的方法：
public class LocalVariableNameReader { Dictionary _names = new Dictionary (); public string this [int index] { get { if (!_names.ContainsKey (index)) return null; return _names [index]; } } public LocalVariableNameReader (MethodInfo m) { ISymbolReader symReader = SymUtil.GetSymbolReaderForFile (m.DeclaringType.Assembly.Location, null); ISymbolMethod met = symReader.GetMethod (new SymbolToken (m.MetadataToken)); VisitLocals (met.RootScope); } void VisitLocals (ISymbolScope iSymbolScope) { foreach (var s in iSymbolScope.GetLocals ()) _names [s.AddressField1] = s.Name; foreach (var c in iSymbolScope.GetChildren ()) VisitLocals (c); } }
SymUtil类来自此示例 。
编辑 ：以上链接已损坏。 来自谷歌缓存：
很久以前，我一直在研究如何处理pdb文件，以获得reflection根本无法提供的其他信息。 现在我难过了一个5岁的Mike Stall（ 这里 ）的post，突然间一切都变得清晰了。 我已经整理了一个小例子，它使用.net 4.0来读取方法体代码，就像编译程序集的源代码一样。 请注意，为了使其工作，您必须拥有程序集的pdb。 另外请确保为ISymWrapper添加一个引用，并且您的项目的目标是.Net 4.0框架，而不是.Net 4.0 Client。
using System; using System.Diagnostics.SymbolStore; using System.IO; using System.Reflection; using System.Runtime.InteropServices; namespace PdbTest { class Program { static void Main(string[] args) { Assembly ass = Assembly.GetExecutingAssembly(); ISymbolReader symreader = SymUtil.GetSymbolReaderForFile(ass.Location, null); MethodInfo m = ass.GetType("PdbTest.TestClass").GetMethod("GetStringRepresentation"); ISymbolMethod met = symreader.GetMethod(new SymbolToken(m.MetadataToken)); int count = met.SequencePointCount; ISymbolDocument[] docs = new ISymbolDocument[count]; int[] offsets = new int[count]; int[] lines = new int[count]; int[] columns = new int[count]; int[] endlines = new int[count]; int[] endcolumns = new int[count]; met.GetSequencePoints(offsets, docs, lines, columns, endlines, endcolumns); StreamReader reader = new StreamReader(docs[0].URL); string[] linesOfCode = reader.ReadToEnd().Split('n'); reader.Close(); Console.WriteLine("The content of method PdbTest.TestClass.GetStringRepresentation"); for (int i = lines[0]; i < endlines[count - 1] - 1; i++) { Console.WriteLine(linesOfCode[i]); } } } #region test class public enum MyEnum { Apples, Oranges } public partial class TestClass { public string GetStringRepresentation(MyEnum e) { MyEnum e2 = MyEnum.Apples; return e.ToString() + e2.ToString(); } } #endregion test class #region Get a symbol reader for the given module // Encapsulate a set of helper classes to get a symbol reader from a file. // The symbol interfaces require an unmanaged metadata interface. static class SymUtil { static class NativeMethods { [DllImport("ole32.dll")] public static extern int CoCreateInstance( [In] ref Guid rclsid, [In, MarshalAs(UnmanagedType.IUnknown)] Object pUnkOuter, [In] uint dwClsContext, [In] ref Guid riid, [Out, MarshalAs(UnmanagedType.Interface)] out Object ppv); } // Wrapper. public static ISymbolReader GetSymbolReaderForFile(string pathModule, string searchPath) { return SymUtil.GetSymbolReaderForFile( new System.Diagnostics.SymbolStore.SymBinder(), pathModule, searchPath); } // We demand Unmanaged code permissions because we're reading from the file // system and calling out to the Symbol Reader // @TODO - make this more specific. [System.Security.Permissions.SecurityPermission( System.Security.Permissions.SecurityAction.Demand, Flags = System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode)] public static ISymbolReader GetSymbolReaderForFile( System.Diagnostics.SymbolStore.SymBinder binder, string pathModule, string searchPath) { // Guids for imported metadata interfaces. Guid dispenserClassID = new Guid(0xe5cb7a31, 0x7512, 0x11d2, 0x89, 0xce, 0x00, 0x80, 0xc7, 0x92, 0xe5, 0xd8); // CLSID_CorMetaDataDispenser Guid dispenserIID = new Guid(0x809c652e, 0x7396, 0x11d2, 0x97, 0x71, 0x00, 0xa0, 0xc9, 0xb4, 0xd5, 0x0c); // IID_IMetaDataDispenser Guid importerIID = new Guid(0x7dac8207, 0xd3ae, 0x4c75, 0x9b, 0x67, 0x92, 0x80, 0x1a, 0x49, 0x7d, 0x44); // IID_IMetaDataImport // First create the Metadata dispenser. object objDispenser; NativeMethods.CoCreateInstance(ref dispenserClassID, null, 1, ref dispenserIID, out objDispenser); // Now open an Importer on the given filename. We'll end up passing this importer // straight through to the Binder. object objImporter; IMetaDataDispenser dispenser = (IMetaDataDispenser)objDispenser; dispenser.OpenScope(pathModule, 0, ref importerIID, out objImporter); IntPtr importerPtr = IntPtr.Zero; ISymbolReader reader; try { // This will manually AddRef the underlying object, so we need to // be very careful to Release it. importerPtr = Marshal.GetComInterfaceForObject(objImporter, typeof(IMetadataImport)); reader = binder.GetReader(importerPtr, pathModule, searchPath); } finally { if (importerPtr != IntPtr.Zero) { Marshal.Release(importerPtr); } } return reader; } } #region Metadata Imports // We can use reflection-only load context to use reflection to query for // metadata information rather // than painfully import the com-classic metadata interfaces. [Guid("809c652e-7396-11d2-9771-00a0c9b4d50c"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [ComVisible(true)] interface IMetaDataDispenser { // We need to be able to call OpenScope, which is the 2nd vtable slot. // Thus we need this one placeholder here to occupy the first slot.. void DefineScope_Placeholder(); //STDMETHOD(OpenScope)( // Return code. //LPCWSTR szScope, // [in] The scope to open. // DWORD dwOpenFlags, // [in] Open mode flags. // REFIID riid, // [in] The interface desired. // IUnknown **ppIUnk) PURE; // [out] Return interface on success. void OpenScope([In, MarshalAs(UnmanagedType.LPWStr)] String szScope, [In] Int32 dwOpenFlags, [In] ref Guid riid, [Out, MarshalAs(UnmanagedType.IUnknown)] out Object punk); // Don't need any other methods. } // Since we're just blindly passing this interface through managed code to the Symbinder, // we don't care about actually importing the specific methods. // This needs to be public so that we can call Marshal.GetComInterfaceForObject() on // it to get the underlying metadata pointer. [Guid("7DAC8207-D3AE-4c75-9B67-92801A497D44"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] [ComVisible(true)] [CLSCompliant(true)] public interface IMetadataImport { // Just need a single placeholder method so that it doesn't complain // about an empty interface. void Placeholder(); } #endregion #endregion Get a symbol reader for the given module }
查看Codeplex上的CCI项目。 它有一个PDBReader项目。