Re: Debugging Critical Section lockups

[Robert Shearman]

David D. Hagood wrote:

I may have a repeatable case of an error in locking critical sections, 
so I'd like some pointers as to how to debug this.

The case occurs with the installer for Delorme Street Atlas 5 - on my 
2GHz Athlon desktop it runs without a hitch, but on my oooooold slow 
laptop (how old is it? It's sooooo old, it used PIO for the disk!) the 
program locks up 100% of the time at startup, with 2 threads trying to 
take different critical section locks and dying. It looks like the 
standard deadlock condition: one thread tries to lock A-B-C, the other 
tries to lock A-C-B, and so they deadlock.


Unless the installer is using TryEnterCriticalSection, I would expect 
CPU utilisation to be 0% when deadlocking. Relay logs generally give the 
best clues in this kind of situation.

--
Rob Shearman