Received: (at 21424) by debbugs.gnu.org; 24 Jun 2016 09:17:45 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Jun 24 05:17:45 2016 Received: from localhost ([127.0.0.1]:53425 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1bGNFA-0003DN-SW for submit <at> debbugs.gnu.org; Fri, 24 Jun 2016 05:17:45 -0400 Received: from pb-sasl2.pobox.com ([64.147.108.67]:56069 helo=sasl.smtp.pobox.com) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <wingo@HIDDEN>) id 1bGNF8-0003DE-M1 for 21424 <at> debbugs.gnu.org; Fri, 24 Jun 2016 05:17:43 -0400 Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by pb-sasl2.pobox.com (Postfix) with ESMTP id 6908B1A155; Fri, 24 Jun 2016 05:17:41 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type:content-transfer-encoding; s=sasl; bh=rGPnH2BpzRCp kJNwiScRc8m1ya4=; b=jGPDHhONB79wmoGziwtOItxDRO7uBwst5uzMKyb7p58H HIyQU8K2HIwhKoLJ+vqYn+VuQ+IOz6rQmibLtnmipb2RR9F4p5Ng+ntI51C5jOHH VnSBOVOb3/5XWH1mDTEV/LQx05pXbFAV5DMuTb9Rdy6KX3mh3PddbHjNLIAhkeM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=from:to:cc :subject:references:date:in-reply-to:message-id:mime-version :content-type:content-transfer-encoding; q=dns; s=sasl; b=YEiIig hcP3uAuo1FjaGMiOd4z+4WP18m2XqzxGM646tfA7nihf0MFdRSTxYS5wARV65QVQ Nr0ldwd0eLJVg3cdx1X28ig34bzCkh8g1uXh8JsPHbSZOwDi8mRt40srBgWG2LAP E63NQ9+ktdttwbNmdcDqnZ5gnXN+7EDO3AIgY= Received: from pb-sasl2.nyi.icgroup.com (unknown [127.0.0.1]) by pb-sasl2.pobox.com (Postfix) with ESMTP id 61F011A154; Fri, 24 Jun 2016 05:17:41 -0400 (EDT) Received: from clucks (unknown [88.160.190.192]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pb-sasl2.pobox.com (Postfix) with ESMTPSA id 820961A152; Fri, 24 Jun 2016 05:17:40 -0400 (EDT) From: Andy Wingo <wingo@HIDDEN> To: Rob Browning <rlb@HIDDEN> Subject: Re: bug#21424: Bug#685919: guile-1.6: SIGALRM signal handler does not get called when guile blocks on I/O References: <20120826131404.6959.57720.reportbug@HIDDEN> <87vbbnv53g.fsf@HIDDEN> Date: Fri, 24 Jun 2016 11:17:33 +0200 In-Reply-To: <87vbbnv53g.fsf@HIDDEN> (Rob Browning's message of "Sun, 06 Sep 2015 12:18:43 -0500") Message-ID: <87y45veyj6.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Pobox-Relay-ID: 8040BE7C-39EC-11E6-A082-28A6F1301B6D-02397024!pb-sasl2.pobox.com X-Spam-Score: -1.4 (-) X-Debbugs-Envelope-To: 21424 Cc: 21424 <at> debbugs.gnu.org, Panu Kalliokoski <panu.kalliokoski@HIDDEN>, 685919@HIDDEN, 685919-forwarded@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.4 (-) It does seem clear that we have a bug here; evidently signals do not wake up the reader, neither with readline nor without. Andy On Sun 06 Sep 2015 19:18, Rob Browning <rlb@HIDDEN> writes: > [If possible, please preserve the -forwarded address in any replies.] > > Reference: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=3D765497 > > Panu Kalliokoski <panu.kalliokoski@HIDDEN> writes: > >> While playing with guile on my system, I discovered a weird anomaly >> which I could not reproduce on other systems running guile. If I >> install a signal handler for SIGALRM, it won't get called while guile is >> making an I/O system call. To demonstrate: >> >> [atehwa@karaihin ~/proj/psyk]$ guile >> guile> (alarm 2) >> 0 >> guile> Her=C3=A4tyskello >> [atehwa@karaihin ~/proj/psyk]$ guile >> guile> (sigaction SIGALRM (lambda (x) (display "now!") (newline))) >> (0 . 335544320) >> guile> (alarm 2) >> 0 >> guile> now a lot more than two seconds has passed, while I wrote this >> now! >> <unnamed port>: In expression now: >> <unnamed port>: Unbound variable: now >> ABORT: (unbound-variable) >> [...] >> >> As you can see, the signal handler gets called as soon as guile returns >> from read(2), already before calling (eval). >> >> I can't get to understand what causes this on my system, because another >> Debian system with exact same versions of guile-1.6, libc6 and >> libguile-ltdl-1 seems to work fine, and interrupts the read(2) call with >> the signal handler. > > This appears to still be the case with at least Debian's 2.0.11+1-10 > package, and setting the handler to something that doesn't perform IO > has the same effect (i.e. no alarm until you hit return): > > (sigaction SIGALRM (lambda (x) (exit 1))) > > Thanks
bug-guile@HIDDEN:bug#21424; Package guile.
Full text available.Rob Browning <rlb@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Received: (at 21424) by debbugs.gnu.org; 6 Sep 2015 17:49:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Sep 06 13:49:53 2015 Received: from localhost ([127.0.0.1]:50891 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZYe4e-0001io-Tf for submit <at> debbugs.gnu.org; Sun, 06 Sep 2015 13:49:53 -0400 Received: from defaultvalue.org ([70.85.129.156]:45306) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <rlb@HIDDEN>) id 1ZYe4c-0001ib-AP; Sun, 06 Sep 2015 13:49:50 -0400 Received: from trouble.defaultvalue.org (localhost [127.0.0.1]) (Authenticated sender: rlb@HIDDEN) by defaultvalue.org (Postfix) with ESMTPSA id 4C29B2014F; Sun, 6 Sep 2015 12:49:47 -0500 (CDT) Received: by trouble.defaultvalue.org (Postfix, from userid 1000) id ECD3F14E070; Sun, 6 Sep 2015 12:49:46 -0500 (CDT) From: Rob Browning <rlb@HIDDEN> To: 21424 <at> debbugs.gnu.org, 765497-forwarded@HIDDEN Subject: Re: bug#21424: Acknowledgement (Bug#685919: guile-1.6: SIGALRM signal handler does not get called when guile blocks on I/O) In-Reply-To: <handler.21424.B.14415599333771.ack <at> debbugs.gnu.org> References: <87vbbnv53g.fsf@HIDDEN> <handler.21424.B.14415599333771.ack <at> debbugs.gnu.org> User-Agent: Notmuch/0.20.1 (http://notmuchmail.org) Emacs/24.5.1 (x86_64-pc-linux-gnu) Date: Sun, 06 Sep 2015 12:49:46 -0500 Message-ID: <87egibv3np.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -1.0 (-) X-Debbugs-Envelope-To: 21424 Cc: control <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) retitle 21424 guile-2.0: SIGALRM signal handler does not get called when guile blocks on I/O thanks GNU bug Tracking System <help-debbugs@HIDDEN> writes: > Thank you for filing a new bug report with debbugs.gnu.org. Note: I used the wrong bug number (the old guile-1.6 clone) in the original forwarding. It should have been 765497, and so the Debian forwarded address would be 765497-forwarded@HIDDEN, as in the headers above. Thanks -- Rob Browning rlb @defaultvalue.org and @debian.org GPG as of 2011-07-10 E6A9 DA3C C9FD 1FF8 C676 D2C4 C0F0 39E9 ED1B 597A GPG as of 2002-11-03 14DD 432F AE39 534D B592 F9A0 25C8 D377 8C7E 73A4
bug-guile@HIDDEN:bug#21424; Package guile.
Full text available.Received: (at submit) by debbugs.gnu.org; 6 Sep 2015 17:18:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Sep 06 13:18:53 2015 Received: from localhost ([127.0.0.1]:50880 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ZYdaf-0000yl-3h for submit <at> debbugs.gnu.org; Sun, 06 Sep 2015 13:18:53 -0400 Received: from eggs.gnu.org ([208.118.235.92]:49114) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from <rlb@HIDDEN>) id 1ZYdad-0000yc-5y for submit <at> debbugs.gnu.org; Sun, 06 Sep 2015 13:18:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <rlb@HIDDEN>) id 1ZYdac-00065o-1j for submit <at> debbugs.gnu.org; Sun, 06 Sep 2015 13:18:51 -0400 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org X-Spam-Level: X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50 autolearn=disabled version=3.3.2 Received: from lists.gnu.org ([2001:4830:134:3::11]:41880) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <rlb@HIDDEN>) id 1ZYdab-00065k-VF for submit <at> debbugs.gnu.org; Sun, 06 Sep 2015 13:18:49 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59112) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from <rlb@HIDDEN>) id 1ZYdaa-00079z-KQ for bug-guile@HIDDEN; Sun, 06 Sep 2015 13:18:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from <rlb@HIDDEN>) id 1ZYdaX-00062v-0i for bug-guile@HIDDEN; Sun, 06 Sep 2015 13:18:48 -0400 Received: from defaultvalue.org ([70.85.129.156]:45972) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from <rlb@HIDDEN>) id 1ZYdaW-00062Z-Rq for bug-guile@HIDDEN; Sun, 06 Sep 2015 13:18:44 -0400 Received: from trouble.defaultvalue.org (localhost [127.0.0.1]) (Authenticated sender: rlb@HIDDEN) by defaultvalue.org (Postfix) with ESMTPSA id D8D1A2014F; Sun, 6 Sep 2015 12:18:43 -0500 (CDT) Received: by trouble.defaultvalue.org (Postfix, from userid 1000) id 6EA1514E070; Sun, 6 Sep 2015 12:18:43 -0500 (CDT) From: Rob Browning <rlb@HIDDEN> To: bug-guile@HIDDEN Subject: Re: Bug#685919: guile-1.6: SIGALRM signal handler does not get called when guile blocks on I/O In-Reply-To: <20120826131404.6959.57720.reportbug@HIDDEN> References: <20120826131404.6959.57720.reportbug@HIDDEN> User-Agent: Notmuch/0.20.1 (http://notmuchmail.org) Emacs/24.5.1 (x86_64-pc-linux-gnu) Date: Sun, 06 Sep 2015 12:18:43 -0500 Message-ID: <87vbbnv53g.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -5.0 (-----) X-Debbugs-Envelope-To: submit Cc: Panu Kalliokoski <panu.kalliokoski@HIDDEN>, 685919@HIDDEN, 685919-forwarded@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -5.0 (-----) [If possible, please preserve the -forwarded address in any replies.] Reference: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=3D765497 Panu Kalliokoski <panu.kalliokoski@HIDDEN> writes: > While playing with guile on my system, I discovered a weird anomaly > which I could not reproduce on other systems running guile. If I > install a signal handler for SIGALRM, it won't get called while guile is > making an I/O system call. To demonstrate: > > [atehwa@karaihin ~/proj/psyk]$ guile > guile> (alarm 2) > 0 > guile> Her=C3=A4tyskello > [atehwa@karaihin ~/proj/psyk]$ guile > guile> (sigaction SIGALRM (lambda (x) (display "now!") (newline))) > (0 . 335544320) > guile> (alarm 2) > 0 > guile> now a lot more than two seconds has passed, while I wrote this > now! > <unnamed port>: In expression now: > <unnamed port>: Unbound variable: now > ABORT: (unbound-variable) > [...] > > As you can see, the signal handler gets called as soon as guile returns > from read(2), already before calling (eval). > > I can't get to understand what causes this on my system, because another > Debian system with exact same versions of guile-1.6, libc6 and > libguile-ltdl-1 seems to work fine, and interrupts the read(2) call with > the signal handler. This appears to still be the case with at least Debian's 2.0.11+1-10 package, and setting the handler to something that doesn't perform IO has the same effect (i.e. no alarm until you hit return): (sigaction SIGALRM (lambda (x) (exit 1))) Thanks --=20 Rob Browning rlb @defaultvalue.org and @debian.org GPG as of 2011-07-10 E6A9 DA3C C9FD 1FF8 C676 D2C4 C0F0 39E9 ED1B 597A GPG as of 2002-11-03 14DD 432F AE39 534D B592 F9A0 25C8 D377 8C7E 73A4
Rob Browning <rlb@HIDDEN>:bug-guile@HIDDEN.
Full text available.bug-guile@HIDDEN:bug#21424; Package guile.
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