Subj : Threads terminate with no exception
To   : comp.programming.threads
From : Timothy Madden
Date : Mon Jul 11 2005 08:22 pm

Hello

I have a strange problem in my WinNT service application. I use Win2000 
SP4, Visual C++ 6.0 SP6 and WinDbg.

The problem is sometimes my threads terminate unexpectedly and wiht no 
exception. They just vanish. WinDbg stops at an 
ntdll!NtTerminateThread+0xb function without normally returning all 
functions listed in Calls stack. I told it to display notifications
if unknown exceptions occur and it displays nothing. Once I've seen a
message like this in Visual C++ debuger: 'Exception 0x0000006 (Unknonwn 
name)'.

I use catch(...) in all my thread functions and no exception is catched
I can not even reproduce the error. It seams to manifest after I signal 
an event indicating a shutdown request to all threads (they all wait on
this event any time they need to syncronise). This event gets signaled 
after an exception indicating an error or after an user request to stop
my service.

Anyone knows what could produce this behaviour and why could threads 
terminate silently and with no error ?

Thank you
"Timothy Madden"
Romania

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