Re: exception

[Steve Quinlan <steven.quinlan@lmco.com>]

Pablo Campo wrote:
> 
> I am a programmer of ADA and I use the Alsys Active ADA envirotment
> version 5.3
> 
> I am making a proyect full of tasking and interrupts (for example I
> manage the clock interrupt) and my problem is that  my program breaks
> down in execution time and the only information  I recive is "Program
> terminated. Unhandled exception".
> Yesterday, I spent all the morning handling exceptions in all tasks and
> subprograms but the result was the same.
> �What can I do for obtain more information of the problem?
> 
> Nacho - A spanish enginier student.
I don't understand how people can use some of these implementations
which make it so hard to figure out where an exception came from unless
you are in a debugger. OCS and Aonix for example dump out the exception
and a traceback in human readable format (unit/line #) to stdout if a
program dies with an unhandled exception. That symbol table is a small
price to pay for the ability to do problem determination.  

Best I can suggest is: Does that environment come with a debugger that
you can run the application under? If you've got hanlders in all the
tasks and it's still dying, maybe it's happening at elaboration outside
the scope of the task body handlers. You'd need a debugger that is
capable of breaking on exceptions during elaboration.