Subj : Re: A debugger/profiler not to interfere with threads ?
To   : comp.programming.threads
From : Jason Curl
Date : Fri Aug 12 2005 11:29 am

Timothy Madden wrote:
> Jason Curl wrote:
> 
>> Timothy Madden wrote:
> 
> [...]
> 
>>>
>>> I suspect my service enters some deadlock at shutdown but in the 
>>> debugger thread dinamics is of course radicaly changed and then by 
>>> chance everythig seems to work fine.
>>>
>>> Do you know of any profiler or debugger that could monitor all 
>>> sincronization operations on my threads in such a way that the 
>>> debuged service runs at exactly the same speed and receives the same 
>>> timeslices in each thread so that I can reproduce the problem. 
>>> Perhaps on a multiprocessor that could run my service on one CPU and 
>>> the debugger/profiler on the others.
>>
>>
>>
>> One suggestion is to "print" to a console on shutdown. The site 
>> www.sysinternals.com has some interesting articles about how to do 
>> this.  And then narrow down to where the problem is there by how your 
>> program reacts.
>>
>> Alternatively, you might be able to shutdown your service, and when 
>> you think it has "hung", attach a debugger to that process and find 
>> out where.
>>
> [...]
> 
> Thank you for your response.
> 
> I did something similar, i. e. I have written in a log file all 
> syncronisation operations. Usualy this to could have also changed time 
> division betwwen threads and so could have hidden back my bug, but this 
> time I was lucky.
> 
> Finaly I found out I had an auto-reset event where I should have had a 
> manual-reset one. I still wonder how could it possibly ever have worked 
> under the debugger, 'cause it sure had.
> 
> And by the way, it happens that a service is not allowed to hang upon 
> shutdown and stay hung, Windows will terminate the host process after a 
> limited time. And this happens also if the process has a debugger 
> attached to it.

Hopefully this link might let you extend the time that it takes to 
shutdown Windows.

http://support.microsoft.com/?kbid=146092&sd=RMVP

http://www.microsoft.com/resources/documentation/Windows/2000/server/reskit/en-us/Default.asp?url=/resources/documentation/Windows/2000/server/reskit/en-us/regentry/26734.asp


> 
> "Timohty Madden"
> Romania

.