This is the mail archive of the
mailing list for the Cygwin project.
Re: [PATCH draft 0/6] Remove the fhandler_base_overlapped class
On 6/7/2019 3:13 PM, Ken Brown wrote:
> On 6/7/2019 2:31 PM, Achim Gratz wrote:
>> Ken Brown writes:
>>> I think I've found the problem. I was mishandling signals that arrived during a
>>> read. But after I fix that, there's still one nagging issue involving timerfd
>>> code. I'll write to the main list with details. I *think* it's a timerfd bug,
>>> but it's puzzling that I only see it when testing my new pipe implementation.
>> Anything triggering a race or deadlock will depend on so many other
>> things that it really is no surprise to see seemingly unrelated changes
>> making the bug appear or disappear. There are certainly races left in
>> Cygwin, I see them from time to time in various Perl modules, just never
>> reproducible enough to give anyone an idea of where to look.
> That makes sense.
> In the meantime, I've already discovered another problem, within an hour of
> posting my claim that everything was working fine: If I start emacs-X11 with
> cygserver running, I can't fork any subprocesses within emacs. I get
> 0 [main] emacs 2689 dofork: child 2693 - died waiting for dll loading, errno 11
> Back to the drawing board.... I've never looked at the cygserver code, but
> maybe it will turn out to be something easy.
Good news (for me): This isn't related to my pipe code. The same problem occurs
if I build the master branch. I'll bisect when I get a chance (probably
tomorrow). In the meantime, all I can say is that strace shows a
STATUS_ACCESS_VIOLATION at shm.cc:125.