From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30495 invoked by alias); 28 Aug 2008 13:55:26 -0000 Received: (qmail 30484 invoked by uid 22791); 28 Aug 2008 13:55:24 -0000 X-Spam-Check-By: sourceware.org Received: from smtp6-g19.free.fr (HELO smtp6-g19.free.fr) (212.27.42.36) by sourceware.org (qpsmtpd/0.31) with ESMTP; Thu, 28 Aug 2008 13:54:31 +0000 Received: from smtp6-g19.free.fr (localhost.localdomain [127.0.0.1]) by smtp6-g19.free.fr (Postfix) with ESMTP id 963D3196F2 for ; Thu, 28 Aug 2008 15:54:28 +0200 (CEST) Received: from debian.localnet (den59-1-88-169-45-62.fbx.proxad.net [88.169.45.62]) by smtp6-g19.free.fr (Postfix) with ESMTP id 73ECF1975F for ; Thu, 28 Aug 2008 15:54:28 +0200 (CEST) From: Laurent Carlier To: gdb@sourceware.org Subject: Re: Cannot find new threads: generic error Date: Fri, 29 Aug 2008 17:48:00 -0000 User-Agent: KMail/1.10.0 (Linux/2.6.26-1-amd64; KDE/4.1.0; x86_64; ; ) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200808281553.37056.lordheavym@gmail.com> X-IsSubscribed: yes 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 X-SW-Source: 2008-08/txt/msg00286.txt.bz2 Sorry if i break the thread, i find these mails wihile seraching about this problem. I got the same problem when running gdb with a program using dlopen() too and under debian sid (the same problem occur under the last ubuntu release) I've filled a bug report on debian bug tracking system: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=496494 So the output from gdb is: lordh@debian:~/gb2projets/TunnelSDL$ gdb gbx3 GNU gdb 6.8-debian Copyright (C) 2008 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu"... (gdb) run -p Starting program: /usr/local/bin/gbx3 -p [Thread debugging using libthread_db enabled] Error while reading shared library symbols: Cannot find new threads: generic error Cannot find new threads: generic error (gdb) bt #0 0x00007ff0873787b7 in dl_open_worker () from /lib64/ld-linux-x86-64.so.2 #1 0x00007ff087374366 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2 #2 0x00007ff0873780eb in _dl_open () from /lib64/ld-linux-x86-64.so.2 #3 0x00007ff086ee0fbb in dlopen_doit () from /lib/libdl.so.2 #4 0x00007ff087374366 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2 #5 0x00007ff086ee136c in _dlerror_run () from /lib/libdl.so.2 #6 0x00007ff086ee0f21 in dlopen@@GLIBC_2.2.5 () from /lib/libdl.so.2 #7 0x0000000000420685 in LIBRARY_load (lib=0x15dd400) at gbx_library.c:468 #8 0x0000000000441f4b in COMPONENT_load (comp=0x15dd3a0) at gbx_component.c:250 #9 0x0000000000441b22 in COMPONENT_load_all () at gbx_component.c:110 #10 0x000000000041fd5f in PROJECT_load () at gbx_project.c:456 #11 0x0000000000432d2e in init (file=0x446378 ".") at gbx.c:85 #12 0x00000000004332ef in main (argc=1, argv=0x7fff8f582968) at gbx.c:299 (gdb) >> [Thread debugging using libthread_db enabled] >> Error while reading shared library symbols: >> Cannot find new threads: generic error >> >> I'm using kernel 2.6.24 on a recent debian/unstable libc6. >> >> Where does that error come from? > >This is most often the result of either >A. mismatch between libc.so.6 and libthread_db.so.1, or >B. libpthread.so.0 being stripped. > >What does 'nm /lib/libpthread.so.0 | grep _version' say? The output is: lordh@debian:~$ nm /lib/libpthread.so.0 | grep _version 0000000000010420 r nptl_version Regards,