From owner-freebsd-threads@FreeBSD.ORG Wed May 7 18:12:32 2003 Return-Path: Delivered-To: freebsd-threads@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E1DBC37B401; Wed, 7 May 2003 18:12:32 -0700 (PDT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6883943FAF; Wed, 7 May 2003 18:12:32 -0700 (PDT) (envelope-from davidxu@freebsd.org) Received: from davidw2k (davidxu@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.9/8.12.9) with SMTP id h481CUUp039650; Wed, 7 May 2003 18:12:31 -0700 (PDT) (envelope-from davidxu@freebsd.org) Message-ID: <005d01c314ff$32b737b0$f001a8c0@davidw2k> From: "David Xu" To: "Daniel Eischen" References: Date: Thu, 8 May 2003 09:14:37 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4910.0300 cc: freebsd-threads@freebsd.org Subject: Re: libpthread_init X-BeenThere: freebsd-threads@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Threading on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 May 2003 01:12:33 -0000 ----- Original Message -----=20 From: "Daniel Eischen" To: "David Xu" Cc: Sent: Thursday, May 08, 2003 9:05 AM Subject: Re: libpthread_init > On Thu, 8 May 2003, David Xu wrote: >=20 > > CCed freebsd-threads@freebsd.org > >=20 > > ----- Original Message -----=20 > > From: "Daniel Eischen" > > To: "David Xu" > > Sent: Wednesday, May 07, 2003 8:22 PM > > Subject: Re: libpthread_init > >=20 > >=20 > > > On Wed, 7 May 2003, David Xu wrote: > > >=20 > > > > Is it possible to call libpthread_init in libc at > > > > startup to initialize libpthread for static linked > > > > binary?=20 > > > > for example, use "__attribute__((constructor))" > > > > or put a weak symbol in crt1.c to let libpthread > > > > override it, and be called in libc startup routine? > > >=20 > > > I don't know. It would be nice to get rid of all the > > > calls to lipbthread_init() in libpthread. > > >=20 > >=20 > > I think there should be a weak symbol in crt1.c or somewhere > > to let static linked thread library overide it, the weak symbol = will be called > > at libc startup time to initialize thread library . I don't like = current > > thread initializing mode --- it is triggered by user application, = and the > > initializing point is not clear, where and when is it initialized? >=20 > I know. I brought this up years ago, but didn't really > know how to fix it. >=20 > > It is error-prone mode, while mono-thread has a perfect initializing = step, > > why should threaded app have a bad initializing step, and we must > > put : "if (!__isthreaded) then do something" everywhere in thread = library, >=20 > I know, I know :-) You're preaching to the choir! (I agree) >=20 > > I have already found that a simple "write(1, "hello", 5)" would = cause SEGSIGV > > when it is linked with static pthread library. FreeBSD now has two = mode apps, > > mono-threaded and mutli-threaded, I think both should have a good = initializing > > code, both are important, libc should be refined to reflect the = fact. >=20 > Yes. Have you tried it to see if it works? The other thread > libraries would also need to be updated. We should use a common > symbol like __thread_init() or __libc_thread_init() so they can > all override the same symbol. >=20 This is what I want to see, neat code. :-) I will try to see if I can work out a patch. > --=20 > Dan Eischen >=20 > _______________________________________________ > freebsd-threads@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-threads > To unsubscribe, send any mail to = "freebsd-threads-unsubscribe@freebsd.org" >=20