File locking of target executable

[Kris Warkentin <kewarken@qnx.com>]

I've observed (on Windows at least) that when I'm debugging an 
executable, I can't delete it.  Just having it the executable loaded in 
gdb is insufficient; it actually has to be running.  I didn't see 
anything on a casual sniff through the source but perhaps I'm missing 
some sort of lock procedure.

This comes up in the context of Eclipse: if you're debugging a project 
and try to rebuild, the make fails when it can't unlink the target app.  
It looks like under some circumstances gdb might use memory mapped 
files...could that be the culprit?

cheers,

Kris