Comparing two UNICODE_STRING structs

WINDBG
1

Hi all, Is there a way to compare two UNICODE_STRING structs using WINDBG command? I want to make it into conditional breakpoint command.

Thanks!

2

There may very well be such a function, though I do not know of one.

However, you could use ‘c,’ which is basically windbg’s/kd’s version of
memcmp. You’d have to extract the length from UNICODE_STRING::Length and
use that to form the range.

Good luck,

mm
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of 007xgen@163.com
Sent: Tuesday, March 29, 2011 7:59 AM
To: Kernel Debugging Interest List
Subject: [windbg] Comparing two UNICODE_STRING structs

Hi all, Is there a way to compare two UNICODE_STRING structs using WINDBG
command? I want to make it into conditional breakpoint command.

Thanks!

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3

Is the “c” command actually scriptable as part of an expression or does it
just output to the command window what’s different?

I don’t think there’s anything built in to do unicode string compares either
though.

-scott

–
Scott Noone
Consulting Associate and Chief System Problem Analyst
OSR Open Systems Resources, Inc.
http://www.osronline.com

“Martin O’Brien” wrote in message news:xxxxx@windbg…

There may very well be such a function, though I do not know of one.

However, you could use ‘c,’ which is basically windbg’s/kd’s version of
memcmp. You’d have to extract the length from UNICODE_STRING::Length and
use that to form the range.

Good luck,

mm
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of 007xgen@163.com
Sent: Tuesday, March 29, 2011 7:59 AM
To: Kernel Debugging Interest List
Subject: [windbg] Comparing two UNICODE_STRING structs

Hi all, Is there a way to compare two UNICODE_STRING structs using WINDBG
command? I want to make it into conditional breakpoint command.

Thanks!

WINDBG is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

4

http://social.msdn.microsoft.com/Forums/en/windbg/thread/f998bf93-026d-4803-a067-49f98dbc4e03

On Tue, Mar 29, 2011 at 2:59 PM, <007xgen@163.com> wrote:

Hi all, Is there a way to compare two UNICODE_STRING structs using WINDBG
command? I want to make it into conditional breakpoint command.

Thanks!

WINDBG is sponsored by OSR

For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer