This document provides instructions for debugging .NET applications using WinDbg and the SOS extension. It outlines downloading and installing WinDbg, loading required DLLs like SOS.dll, attaching WinDbg to a running process, and using commands like .load sos, !dumpheap, and !dumpobj to analyze crashes and inspect the CLR heap. Additional resources like blog posts and videos are provided to learn more techniques for advanced .NET debugging.

1. Debugging DotNet app with Windbg + SOS Winson

2. Why? Crash dump analysis CLR internal Pre-requirement: download & installing WinDbg from MSDN

4. http://msdn.microsoft.com/en-us/magazine/cc163791.aspx

5. C:\Program Files\Debugging Tools for Windows (x86) C:\Windows\Microsoft.NET\Framework\v2.0.50727 mscordacwks.dll mscorwks.dll SOS.dll

6. Sample app

7. srv*c:\symbols*http://msdl.microsoft.com/download/symbols

8. Start running target app The code has console.readkey(), so could keep in memory Using “start without debugging”

9. Using “Attach to running process” Don’t know why I can’t use “open executable…”. In my testing only “attach..” could load sos.

10. Using command “.load sos”

11. !sos.help !help funcname

12. !dumpheap

13. !dumpheap –type Program

14. !dumpobj 01359be0

15. Video http://channel9.msdn.com/blogs/egibson/msdn-simulcast-techniques-in-advanced-net-debugging-with-john-robbins-part-1-of-3

16. Links http://blogs.msdn.com/b/tess/ http://www.codeproject.com/KB/cs/net_type_internals.aspx http://blogs.msdn.com/b/dougste/archive/2008/08/08/a-big-list-of-debugging-resources.aspx http ://www.microsoft.com/download/en/details.aspx?id=21255 Psscor Managed-Code Debugging Extension for WinDbg http ://blogs.msdn.com/b/tess/archive/2010/03/01/new-commands-in-sos-for-net-4-0-part-1.aspx http://blogs.msdn.com/b/tom/