dlclose() vs fork()
Corinna Vinschen
corinna-cygwin@cygwin.com
Tue Mar 21 13:42:00 GMT 2017
On Mar 21 09:03, Alexey Sokolov wrote:
> Hello,
> If the same DLL is dlopen()ed several times, dlclose() will actually
> unload the DLL only after the same number of calls to dlclose().
>
> This works fine in cygwin, until we add fork().
>
> It looks like in the child process the counters of inherited DLLs are
> set to 1, so the first dlclose() unloads it, causing segfault for
> subsequent access to the unloaded code.
> https://github.com/znc/znc/issues/1385#issuecomment-288014319 has a
> working minimal example of this behavior.
dlopen/dlclose reference counting was broken. I applied a fix and
uploaded new dev snapshots to https://cygwin.com/snapshots/
I'm just building a 2.8.0-0.2 test release as well.
Please test.
Thanks,
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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