From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12785 invoked by alias); 23 Sep 2014 08:03:52 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 12773 invoked by uid 89); 23 Sep 2014 08:03:51 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-wg0-f42.google.com Received: from mail-wg0-f42.google.com (HELO mail-wg0-f42.google.com) (74.125.82.42) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-SHA encrypted) ESMTPS; Tue, 23 Sep 2014 08:03:49 +0000 Received: by mail-wg0-f42.google.com with SMTP id a1so3865584wgh.25 for ; Tue, 23 Sep 2014 01:03:46 -0700 (PDT) X-Received: by 10.194.121.232 with SMTP id ln8mr5826966wjb.65.1411459425980; Tue, 23 Sep 2014 01:03:45 -0700 (PDT) Received: from [192.168.42.170] (44-236.197-178.cust.bluewin.ch. [178.197.236.44]) by mx.google.com with ESMTPSA id a19sm1345054wic.1.2014.09.23.01.03.44 for (version=SSLv3 cipher=RC4-SHA bits=128/128); Tue, 23 Sep 2014 01:03:45 -0700 (PDT) Message-ID: <1411459391.19301.0.camel@Device-03036C> Subject: Re: non meaningful output with pthread From: =?ISO-8859-1?Q?Jo=EBl_Kr=E4hemann?= To: gdb@sourceware.org Date: Tue, 23 Sep 2014 08:03:00 -0000 In-Reply-To: <1411454486.3642.7.camel@Device-03036C> References: <1411454486.3642.7.camel@Device-03036C> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-IsSubscribed: yes X-SW-Source: 2014-09/txt/msg00076.txt.bz2 Am Dienstag, den 23.09.2014, 08:41 +0200 schrieb Joël Krähemann: > Hi, I'm doing a sequencer and since I'm doing optical feedbacks I > experience bad crashes. The engine becomes unreliable and gdb gives > useless output. > > I'm doing everything in view of thread safety from atomic operations to > mutices, syncing ... > > please take a look at http://ags.sf.net > > > [New Thread 0x7fffb8db1700 (LWP 917)] > [New Thread 0x7fffb85b0700 (LWP 918)] > ** Message: short write, write 88 frames > [New Thread 0x7fffb7daf700 (LWP 919)] > ** Message: short write, write 240 frames > [New Thread 0x7fffb75ae700 (LWP 920)] > ** Message: short write, write 120 frames > [New Thread 0x7fffb6dad700 (LWP 921)] > ** Message: short write, write 521 frames > [New Thread 0x7fffb65ac700 (LWP 922)] > ** Message: short write, write 279 frames > [New Thread 0x7fffb5dab700 (LWP 923)] > [New Thread 0x7fffb55aa700 (LWP 924)] > ** Message: short write, write 176 frames > [New Thread 0x7fffb4da9700 (LWP 925)] > ** Message: short write, write 160 frames > [New Thread 0x7fffb45a8700 (LWP 926)] > ** Message: short write, write 240 frames > [Thread 0x7fffe3776700 (LWP 883) exited] > ** Message: short write, write 400 frames > [Thread 0x7fffb95b2700 (LWP 916) exited] > [New Thread 0x7fffb3da7700 (LWP 927)] > ** Message: short write, write 120 frames > [Thread 0x7fffe0770700 (LWP 889) exited] > ** Message: short write, write 80 frames > ** Message: short write, write 160 frames > [Thread 0x7fffb5dab700 (LWP 923) exited] > [Thread 0x7fffb6dad700 (LWP 921) exited] > ** Message: short write, write 80 frames > ** Message: short write, write 80 frames > > ... > > Couldn't get registers: Kein passender Prozess gefunden. > (gdb) bt > #0 0x00007ffff3a42cef in start_thread (arg=) at > pthread_create.c:349 > #1 0x00007ffff378ce6d in clone () > at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 > #2 0x0000000000000000 in ?? () > > The bad crashes were probably caused by non atomic get where it had should been atomic.