From: oliver <oliver@first.in-berlin.de>
To: Matej Kosik <5764c029b688c1c0d24a2e97cd764f@gmail.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] signal-unsafety of %!
Date: Fri, 15 Mar 2013 17:02:32 +0100 [thread overview]
Message-ID: <20130315160232.GB5664@siouxsie> (raw)
In-Reply-To: <514344C4.4070908@gmail.com>
On Fri, Mar 15, 2013 at 03:56:52PM +0000, Matej Kosik wrote:
> On 15/03/13 14:36, oliver wrote:
> > On Fri, Mar 15, 2013 at 02:30:29PM +0000, Matej Kosik wrote:
> >> Hi,
> >>
> >> When I compile the attached program
> >>
> >> (with compilers available directly from Debian's repositories)
> >>
> >> I can observe a (non-deterministic) deadlock.
> >>
> >> When I remove
> >>
> >> %!
> >>
> >> from the printf function inside the SIGALRM's handler, the deadlock never seem to occur.
> >>
> >> Obviously, interference can be easily introduced in concurrent programs; I was just surprised that even something like
> > [...]
> >
> >
> > Whats going on today?
> >
> > Use Unix.sigprocmask.
> >
> > Ciao,
> > Oliver
> >
>
> Right, printf simply isn't reentrant.
>
> (what I was observing was a program that was busy-looping, but stuck. I guess because internal shared data might have been damaged.).
Ah, yes, you used it inside the signal handler.
Have overlooked it.
Ciao,
Oliver
prev parent reply other threads:[~2013-03-15 16:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-15 14:30 Matej Kosik
2013-03-15 14:36 ` oliver
2013-03-15 15:56 ` Matej Kosik
2013-03-15 16:02 ` oliver [this message]
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