Eric Blake wrote:
Actually, you are. The ONLY way to make renaming in-use .dlls work is
to make fork() aware of the rename. The way fork() works is that it
must reload the same .dll as the parent process had loaded, and it
currently does this BY NAME. In other words, changing the name of an
in-use dll will break the child process, even if you then install
another dll at that location, because the new
dll will have a different layout in memory, and will not reload
cleanly. For your scheme to work, you must teach fork() how to track
these renames, and load the original .dll by its new name, and not the
upgraded dll that now lives at the original name.
This part peaks my curiosity. Now I'm not a kernel guy however as you
state fork currently knows which dlls to load for the child by name.
While that makes sense on the outside what if it knew which dlls to load
by number - by open file descriptor number that is? I mean wouldn't that
be a clean way to change fork() to allow it to load the proper, in this
case, old dlls?
Another question, how is this not a problem for Unix's fork()? Does
Unix's fork also do this by name? Or does it use another mechanism?
(I'm not saying that Cygwin's fork == Unix's fork - indeed perhaps there
are deep technical reasons why using a file descriptor approach is
infeasible in Cygwin under Windows).
--
Andrew DeFaria <http://defaria.com>
A friend of mine is into Voodoo Acupuncture. You don't have to go.
You'll just be walking down the street, and...........ooooohhhhhh,
that's much better...
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