Date: Wed, 25 Jan 2006 17:58:23 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: Julian Elischer <julian@elischer.org> Cc: threads@freebsd.org Subject: Re: [Fwd: Re: Changes from 5.2.1 to 5.3 (theads / signal handling)] Message-ID: <Pine.GSO.4.43.0601251755510.1795-210000@sea.ntplx.net> In-Reply-To: <43D80123.5050503@elischer.org>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --------------050500030300040701010603 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII; FORMAT=flowed Content-ID: <Pine.GSO.4.43.0601251755512.1795@sea.ntplx.net> On Wed, 25 Jan 2006, Julian Elischer wrote: >... I have no idea what this was trying to say, but the word fork() came out. A multithreaded process that forks may only call (in the child) async-signal-safe functions before calling one of the exec() functions. -- DE --------------050500030300040701010603 Content-Type: MESSAGE/RFC822; NAME="Re: Changes from 5.2.1 to 5.3 (theads / signal handling)" Content-ID: <Pine.GSO.4.43.0601251755513.1795@sea.ntplx.net> Content-Description: Content-Disposition: INLINE; FILENAME="Re: Changes from 5.2.1 to 5.3 (theads / signal handling)" Received: from localhost.localdomain (mar92-6-82-226-38-60.fbx.proxad.net [82.226.38.60]) by idiom.com (8.12.11/8.12.11) with ESMTP id k0PKdgdO034379 for <julian@elischer.org>; Wed, 25 Jan 2006 12:39:43 -0800 (PST) (envelope-from Jose-Marcio.Martins@ensmp.fr) Received: from [127.0.0.1] (localhost. [127.0.0.1]) by joe.j-chkmail.org (sendmail X.1.0.PreAlpha1.0) with ESMTP id S000000000000024E01; Wed, 25 Jan 2006 21:39:33 +0100 Message-ID: <43D7E202.2020607@ensmp.fr> Date: Wed, 25 Jan 2006 21:39:30 +0100 From: Jose Marcio Martins da Cruz <Jose-Marcio.Martins@ensmp.fr> Reply-To: Jose-Marcio.Martins@ensmp.fr User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20050920 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Julian Elischer <julian@elischer.org> CC: freebsd-hackers@freebsd.org Subject: Re: Changes from 5.2.1 to 5.3 (theads / signal handling) References: <43D74F91.2090009@ensmp.fr> <43D7C786.1090803@elischer.org> In-Reply-To: <43D7C786.1090803@elischer.org> Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms040702080701060306070401" X-ClamAV-Status: No X-Spam-Status: No, hits=-1.6 required=5 tests=BAYES_00,RCVD_IN_SORBS_DUL, AWL X-Accessio-Status: NO, score=1.23,466590 version=6.0 count=2 X-Idiom-Reporting: If this was spam, please report it to http://www.spamcop.net This is a cryptographically signed message in MIME format. --------------ms040702080701060306070401 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Julian Elischer wrote: > Jose Marcio Martins da Cruz wrote: >=20 > a new threading library. Hmmmm. Here are my compile flags : CPPFLAGS : only some -I and -D flags CFLAGS : -D_THREAD_SAFE -pthread LDFLAGS : -lmilter -lkvm -lm -lpthread > have you tried 6.0? Yes. It presents the same behaviour. Either way, I've found it with 6.0, = and=20 tried back with previous versions till find when the change took place. > also, does the child do an exec() after forking? No. The child gets out the father loop and calls another initialisation f= unction. As It seemed to me that all father's threads are stopped in the forked pr= ocess,=20 this seemed to me not be a problem. Am I right ? The signal handler thread is launched by the following sequence of instru= ctions. sigemptyset(&set); sigaddset(&set, SIGHUP); sigaddset(&set, SIGTERM); sigaddset(&set, SIGINT); sigaddset(&set, SIGUSR1); sigaddset(&set, SIGUSR2); if ((r =3D pthread_sigmask(SIG_BLOCK, &set, NULL)) !=3D 0) { errno =3D r; LOG_SYS_ERROR("Couldn't mask signals"); } if ((r =3D pthread_create(&tid, NULL, filter_signal_handler, NULL)) !=3D= 0) LOG_SYS_ERROR("Error launching filter_signal_handler"); Thanks for your help. 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