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Special Command—Unassembling code with u, ub and uf

When debugging sooner or later you will need to disassemble code to get a better understanding of that code. By disassembling the code, you get the mnemonics translated from the 0s and 1s that constitute the binary code. It is a low level view of the Read More...
Posted Thursday, November 05, 2009 9:27 PM by Roberto Farah | 2 Comments

Special Command—Using .dump/.dumpcab to Get Dumps and Symbols from Production Servers

Using WinDbg you can create a dump file from an application running, for instance, in a production server. After collecting the dump file, you can load it in another machine and debug it. However, to be more effective during your debugging session you Read More...
Posted Wednesday, September 16, 2009 12:55 AM by Roberto Farah | 3 Comments

[PowerShell Script] PowerDbg v5.2—Using PowerShell to Control WinDbg

This version has two improvements and some scripts were changed to be compatible with this new version: - Starting on version 5.2 the log used to save the command output, enabling the communication between PowerShell and WinDbg is not used anymore. Now Read More...
Posted Wednesday, April 15, 2009 6:43 AM by Roberto Farah | 3 Comments

[PowerShell Script] PowerDbg v5.1—Using PowerShell to Control WinDbg

So, here we go again. This is a minor version with a few new cmdlets. These new cmdlets are those that we use most of the time. DOWNLOAD POWERDBG Download PowerDbg POWERDBG FILES WinDbg.PSM1 ß Contains cmdlets used to communicate with WinDbg . Microsoft.PowerShell_Profile. Read More...
Posted Thursday, March 19, 2009 7:28 PM by Roberto Farah | 3 Comments

Special Command—Peeking Memory Addresses Using !address

Let’s say that you get a memory address and you want to know if it’s from the heap, the stack, or someplace else. Or yet, let’s say you have a .NET application consuming lots of memory, and you want to get a better understanding of this memory consumption. Read More...
Posted Tuesday, March 17, 2009 11:10 PM by Roberto Farah | 2 Comments

[PowerShell Script] PowerDbg v5.0—Using PowerShell to Control WinDbg

I’m very excited to present the new PowerDbg v5.0! There’s just one change, but it’s a HUGE change that makes PowerDbg extremely fast and easier to use. Let me explain: Send-PowerDbgCommand is the heart of PowerDbg . This is the cmdlet that sends information Read More...
Posted Wednesday, February 04, 2009 3:38 AM by Roberto Farah | 1 Comments

[PowerShell Script] Finding Out the Managed Objects that "Leaked"

Here in PFE most of my teammates use the same approach to identify managed objects that “leak”. The idea is to run !DumpHeap –stat once, wait several minutes to allow the “leak” to make itself evident, then run the command a second time. After that you Read More...
Posted Friday, November 14, 2008 12:02 AM by Roberto Farah | 10 Comments

[PowerShell Script] Chart and Statistics from Top 20 Objects Leaking

If you want to know the top 20 objects associated with the GC Handles that are leaking, you have manual work to do. Think about it: a) Run GCHandleLeaks and wait… it’s going to take time. b) Get the objects’ instances from the handles. c) Count and classify Read More...
Posted Friday, August 22, 2008 11:46 PM by Roberto Farah | 9 Comments
 
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