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Re: Need tips debugging a crash porting an app to cygwin caused by sth overwriting a function
On Wed, Dec 17, 2003 at 11:40:39PM +0100, Dalibor Topic wrote:
>I was thinking about defining a gdb command along the lines of
>
>define my-stepi-watch
>while (*(long *) findJarFiles == original_value)
>stepi
>end
>
>though I've never done that before, so I'm not sure if that would work ;)
It might work but I think you'd probably end up tracking the heat death
of the universe before you'd see a result. :-)
>I'm not sure about using binary search, as there might be some threading
>involved, so I assume it's safer to just check on each stepi and let the
>machine run overnight.
Ah, threading. That complicates matters a lot.
Another way to catch this is to call VirtualProtect on the regions in
question and make them read-only. Then when something trashes the
location it will die immediately.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/memory/base/virtualprotect.asp
cgf
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