[wdmaudiodev] Re: Debugging an APO

  • From: "Leonard Shoell" <lshoell@xxxxxxxxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Sat, 7 Jun 2008 07:33:01 -0600

For debugging APOs and property page extensions I prefer to use Visual
Studio 2005. WinDbg also works, but I like the debugger is VS2005. Here are
a few hints:


1.       Run audiosrv in its own container by doing the following from a
command line and rebooting:

sc config audiosrv type= own

2.       In VS 2005 set the symbol file location (Tools | Settings |
Debugging | Symbols)

3.       Start debugging by attaching to AudioDG. (In the "Attach to
Process" dialog, check two checkboxes at the bottom "Show processes from all
users" and "Show process in all sessions".




From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Tim Roberts
Sent: Friday, June 06, 2008 5:45 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Debugging an APO


Tim Roberts wrote: 

I'm just digging in to the creation of a GFX APO, and I'm looking for a few
debugging tips.

I don't seem to see my OutputDebugString output in dbgview when my DLL is
loaded into the audio engine service.  I do see the messages when it gets
loaded by Control Panel, but that's not the interesting case.

How can I insert a new version while I'm debugging?  Even if I disable the
Windows Audio and Windows Audio Endpoint Builder services and disable my
HDAUDIO device, my APO DLL remains loaded in one of the service host
processes, and I can't copy a new version into place while it is loaded.

Any debug hints from folks who have been in the trenches would be

Well, for what it's worth, I can get the debug messages if I attach a
debugger to the audiodg.exe process itself.  I still don't understand why
the messages don't appear in dbgview.

And the issue about not being able to update the DLL seems to have been a
transient thing.  As long as I stop the two services, I can replace the DLL
just fine.

Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.

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