Date: Thu, 3 Sep 2015 19:02:50 +0800 From: Erich Dollansky <erichsfreebsdlist@alogt.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: FreeBSD stable <freebsd-stable@freebsd.org>, freebsd-threads@freebsd.org Subject: Re: pthread_cancel / sleep change in behaviour Message-ID: <20150903190250.26273e27@X220.alogt.com> In-Reply-To: <20150903104351.GE2072@kib.kiev.ua> References: <20150903080047.16be939e@X220.alogt.com> <20150903081947.GB2072@kib.kiev.ua> <20150903183353.2633a38b@X220.alogt.com> <20150903104351.GE2072@kib.kiev.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, On Thu, 3 Sep 2015 13:43:51 +0300 Konstantin Belousov <kostikbel@gmail.com> wrote: > On Thu, Sep 03, 2015 at 06:33:53PM +0800, Erich Dollansky wrote: > > On Thu, 3 Sep 2015 11:19:47 +0300 > > Konstantin Belousov <kostikbel@gmail.com> wrote: > > > > > On Thu, Sep 03, 2015 at 08:00:47AM +0800, Erich Dollansky wrote: > > > > > > > > Is this change of behaviour a feature or a bug? > > > > > > Provide a minimal example demonstrating the issue. > > > > while preparing the example I found the source of the problem. We > > have to block all signals for some reason. The handling for > > > > signal (SIGTHR, SIG_IGN); > > > > seems to have changed. The moment I remove above's line from the > > code, the program works. There is no difference when the programs > > runs on machines prior mid November 2014. > > > Err, this is a bug, probably both in your program (user code must not > twiddle with SIGCANCEL) and in libc. The later, I believe, was fixed I did not know of this. I simply blocked all. As it worked when I tested it those days, I forgot about it. > in the HEAD r287300, which is not yet merged back to stable/10. The > libthr has a protection disallowing user code manipulating SIGCANCEL, > but due to the bug in libc signal(3) override the libthr measures. > > Apply the r287300 to your src/ and try your unchanged program with > updated libc. But yes, SIGTHR/SIGCANCEL in the program is bug. > I am just updating another machine. It might be already tomorrow when I will come back to you. Erich
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150903190250.26273e27>