From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1311 invoked by alias); 17 Jan 2003 13:54:03 -0000 Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sources.redhat.com Received: (qmail 1297 invoked from network); 17 Jan 2003 13:54:00 -0000 Received: from unknown (HELO crack.them.org) (65.125.64.184) by sources.redhat.com with SMTP; 17 Jan 2003 13:54:00 -0000 Received: from nevyn.them.org ([66.93.61.169] ident=mail) by crack.them.org with asmtp (Exim 3.12 #1 (Debian)) id 18ZYpN-000852-00; Fri, 17 Jan 2003 09:54:42 -0600 Received: from drow by nevyn.them.org with local (Exim 3.36 #1 (Debian)) id 18ZWwZ-0005BM-00; Fri, 17 Jan 2003 08:53:59 -0500 Date: Fri, 17 Jan 2003 13:54:00 -0000 From: Daniel Jacobowitz To: Frank van Eijkelenburg Cc: Gnu Debugger mailing list Subject: Re: multithreaded remote debugging Message-ID: <20030117135359.GA19881@nevyn.them.org> Mail-Followup-To: Frank van Eijkelenburg , Gnu Debugger mailing list References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.1i X-SW-Source: 2003-01/txt/msg00301.txt.bz2 On Fri, Jan 17, 2003 at 12:29:16PM +0100, Frank van Eijkelenburg wrote: > Hi, I'm new to gdb. I try to remote debug an application: > > I have a linux machine with redhat installed (2.4.7-10), this is the host. > On the target an ARM processor is running with linux kernel 2.4.16. I > compiled gdb on the host (with target arm-linux). I also cross-compiled > gdbserver. My application (which I want to debug) is compiled with compiler > option -g. I can start the gdbserver on the target and gdb on the host and > have a connection by tcp/ip. The application is multithreaded and uses the > libpthread library. If I ignore the SIG32 signal (with "handle SIG32 nostop" > and "handle SIG32 noprint") I can run the application. However, if I try to > execute "info threads" I only get information about one thread (the main > thread??). I can put breakpoints in the main thread and step through the > code, but if I put a breakpoint in another thread, the debugger will stop, > but I cannot step through the code: > > Program received signal SIGTRAP, Trace/breakpoint trap. > 0x400ab2e4 in ?? () > (gdb) n > Cannot find bounds of current function > > What do I wrong or is it not possible to step through the code of other > threads beside the main thread? You neglected to say what version you're using. We only got support for remote thread debugging between GDB 5.2 and 5.3; if you aren't using 5.3, you should try it. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer