From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 26 Mar 2003 20:55:08 -0500 From: Daniel Jacobowitz To: Kalpesh Jasapara Cc: gdb@sources.redhat.com, linuxppc-dev@lists.linuxppc.org, linuxppc-embedded@lists.linuxppc.org Subject: Re: GDB server and threaded application Message-ID: <20030327015508.GA31754@nevyn.them.org> References: <20030326134141.GA32522@nevyn.them.org> <20030327000011.97424.qmail@web14607.mail.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20030327000011.97424.qmail@web14607.mail.yahoo.com> Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: No, --attach to a threaded application is _not_ currently supported. On Wed, Mar 26, 2003 at 04:00:11PM -0800, Kalpesh Jasapara wrote: > > I believe I have the solib path set correctly and all the symbols are > being loaded when I connect to the remote target. > > BTW I am able to debug core files correctly and the core files > show all the threads. Its an issue if I try to attach to a running > multithreaded process. > > gdbserver :12345 --attach , I just pick up one of the PID's of > the multithreaded process. I guess this is supported. > > --- Daniel Jacobowitz wrote: > > On Tue, Mar 25, 2003 at 09:39:01PM -0800, Vladimir > > Gurevich wrote: > > > > > > Kalpesh Jasapara wrote: > > > >I am having a problem with remote gdb debugging using gdbserver > > > >to work with multi threads. The command "info threads" shows only > > > >one thread. > > > > > > Here is a relevant excerpt from Wolfgang Denk's posting from > > > ppc-embedded: > > > > As usual, Wolfgang's answer is somewhat biased. GDB 5.3's > > multithreaded debug support is complete, and works very well once > > you have it set up. The only thing missing in the FSF tree is the > > little "[New thread 21211]" messages, which are purely cosmetic; > > I never came to an agreement about how to implement them in the > > current protocol. > > > > Neither the version originally in HHL 2.0 nor gdb 5.2.1 supported it > > however. Kalpesh said he was trying gdb 5.3, which does. > > > > I would also like to offer Wolfgang a BIG KICK IN THE HEAD. I have > > looked at the relevant path on his FTP site that you referenced > > below; despite his name as the only name on the "ChangeLog entry" in > > the README and the claim of "we spend some work", it is my work. I > > wrote just about every line of that patch. > > > > As usual proper credit would be appreciated. > > > > > >in message <20020820144703.16442.qmail@web20107.mail.yahoo.com> you wrote: > > > > > > > >>I'm trying to debug a multi-threaded application using gdbserver > > > >>on the remote/target side and I`m having some problems, the > > > >>output I got is depicted below: > > > > > > > > > > > >I'm not surprised. This is broken in most versions of GDB / > > > >gdbserver floating around. > > > > > > > > > > > >>I`m using gdbserver5.2.1 (I tried the one from HHL-2.0 > > > >>Journeyman and didn`t worked too) compiled by myself using > > > >>Mvista HHL 2.0 tools and gdb 5.2.1 on my i386. Am I doing > > > >>something wrong or remote thread debugging is not supported by > > > >>gdb? I have read something about > > > > > > > >Let's say the support is incomplete :-) > > > > > > > >>problems with multi-thread application debugging but I thought > > > >>that it may be OK at this time... Could someone explain to me > > > >>what`s happening? > > > > > > > >Check out our ELDK (see http://www.denx.de/ELDK); it contains an > > > >extended / bug fixed version of GDB / gdbserver; remote target > > > >debugging of MT applications was one of the areas where we spend > > > >some work. > > > > > > > >If you're just looking for the patches: these > > > >can be found on our FTP server; the README > > > >including description of the test procedure is at > > > >ftp://ftp.denx.de/pub/ppc/patches/README-GDB-MT-Support -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/