Subj : A debugger/profiler not to interfere with threads ?
To   : comp.programming.threads
From : Timothy Madden
Date : Wed Aug 10 2005 06:16 pm

Hy

I have a thread syncronization problem in my application (a WinNT 
service, I have Win2000 5.00.2159 SP4, Visual C++ 6.0 SP6).

The problem is at shutdown application hangs until Windows service 
control manager terminates it (I guess).

With the service executable under the debugger (WinDbg 6.5.0003.7) every 
thing works just fine and the service shuts down nice and clean.

I have some complicated thread syncronisation sequences in my code. I 
have written a buffer to support read access, write access, memory 
allocation and memory deallocation all on different threads. I did in in 
the hope to make it a little more responsive and fast, although I don't 
know if I succeded.

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.

Thank you
"Timothy Madden"
Romania

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