Volker v.

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Displaying dynamically allocated c arrays

Volker v. posted an article on - Dec 4, 2009, 1:54 am
I just analyzed a crash dump were I needed to investigate a dynamically allocated a array. We have a declaration: CString **ids; the allocation ids = new CString*[size]; Given a size of 8 you can dump the content of the string array with dt -a : 0:000> dv ids          Â...
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Windbg 6.11.1.402 is out

Volker v. posted an article on - Feb 20, 2009, 4:17 pm
There's no support for integrated managed debugging. Here's the link: http://www.microsoft.com/whdc/devtools/debugging/installx86.mspx#a   Highlights in Version 6.11.1.402 The following changes have been made to Debugging Tools for Windows: • Numerous bug fixes and documen...
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Another goody: uf /c /D and the peb lock

Volker v. posted an article on - Feb 13, 2009, 5:43 am
Remember my previous post? I was hunting a dead lock and found the good old 6.7.5.0 again worth keeping. But I didn't write about the dead lock cause itself. Now here it comes:   The main thread was waiting for the peb lock: 0:00> ~0 kb ChildEBP RetAddr Args to Child 0012c72...
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Keeping the Pearl

Volker v. posted an article on - Feb 12, 2009, 5:45 am
I recently get a memory dump of a hanging process. So I opened it with windbg 6.10.3.233 The main thread was looking like this: 0:00> ~0 kb ChildEBP RetAddr Args to Child 0012c72c 7c90e9c0 7c91901b 0000056c 00000000 ntdll!KiFastSystemCallRet 0012c730 7c91901b 0000056c 00000000 ...
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Article about Remote Debugging

Volker v. posted an article on - Feb 10, 2009, 2:41 am
Mark? has published a very good article about Remote Debugging on the Microsoft Advanced Windows Debugging and Troubleshooting Blog. Enjoy!
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Symbol Server Performance Improvement

Volker v. posted an article on - Dec 18, 2008, 8:50 am
Once you've fallen in love with your own symbol server you might discover bad performance the bigger the symbol store grows. We've recently moved our private symbol server onto a new server and found in the symhttp.doc the following: Normally files are placed in a symbol store with a s...
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Windbg version 6.10.3.233 is out (I'm still keeping 6.7.5.0)

Volker v. posted an article on - Nov 24, 2008, 10:23 am
As some blogs (here and here) already published there is a new version of windbg 6.10.3.233 out:   Here's the direct download link. Unfortunately there's still no inherent managed debugging support as we had with 6.7.5.0 so I'll keep this version (until the end of days?)...   UPDATE ...
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How to modify memory of a running process

Volker v. posted an article on - Oct 7, 2008, 3:05 am
Kahled asked me how to modify memory at a certain addess. So here we go... Launch notepad and type "hallo" Now attach windbg to it and search for the "hallo" string using the scan memory pattern: 0:001> s -u 0x00000000 L?0xffffffff "hallo" 00184958  0068 0061 006c 006c 006f 0000...
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Amazing helper .cmdtree

Volker v. posted an article on - Sep 17, 2008, 4:44 am
In Roberto Farah's most recent post he mentions the command .cmdtree which is available since version 6.6.7.5. The result looks amazing and makes debugging with windbg a lot more productive and it makes it much more useful for especially for newbies: I've put the text file proposed by R...
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Interview with Mario Hewardt and Daniel Pravat on Channel9

Volker v. posted an article on - Sep 11, 2008, 3:29 am
The authors of the excellent book Advanced Windows Debugging Mario Hewardt and Daniel Pravat are talking about debugging windows and the drivers to write the book on Channel9. The book is great and should be in the book shelf of every windows developer, because it describes a structured way of do...
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