wine users - Oct 2004 - Debugging advice

Hi folks,

I am trying to debug a scientific / engineering application called SRIM
(www.srim.org, particularly the batch-mode version of SRIM 2003 called
"SRModule").  This is my first experience with a debugger like
winedbg, so
I am still learning how best to use it.

My question for now is: given a known breakpoint, and a value to watch (in
this case $ecx), is there an easy way to find the last instruction before
the breakpoint that changed this value?  The only way I know of to do this
so far is to set an earlier breakpoint and spend a whole lot of time stepping
through instructions.

Depending on how the debugging goes, I'll probably ask some more specific
questions about the exceptions I'm seeing.  The first problem was pretty
straightforward, and is successfully fixed, so that's an encouraging
start!

Thanks,
Walter

On Sat, 16 Oct 2004 15:25:23 -0700 (PDT), you wrote:
> Hi folks,
> 
> I am trying to debug a scientific / engineering application called SRIM
> (www.srim.org, particularly the batch-mode version of SRIM 2003 called
> "SRModule").  This is my first experience with a debugger like
winedbg, so
> I am still learning how best to use it.
> 
> My question for now is: given a known breakpoint, and a value to watch (in
> this case $ecx), is there an easy way to find the last instruction before
> the breakpoint that changed this value?  The only way I know of to do this
> so far is to set an earlier breakpoint and spend a whole lot of time
stepping
> through instructions.
Not that I know of. You can disassemble the code before the breakpoint,
but if the code include jumps it takes a lot of interpretations. 

(you are talking about stepping through the applications code I assume.
Wines code is easier because you have the source)
> 
> Depending on how the debugging goes, I'll probably ask some more
specific
> questions about the exceptions I'm seeing.  The first problem was
pretty
> straightforward, and is successfully fixed, so that's an encouraging
> start!
I think you should ask these questions on the developer list.

Rein. 
-- 
Rein Klazes
rklazes@xs4all.nl