This is the mail archive of the
gdb@sources.redhat.com
mailing list for the GDB project.
Re: gdbserver and multithreaded programs
- From: Daniel Jacobowitz <drow at mvista dot com>
- To: Dan Kegel <dkegel at ixiacom dot com>
- Cc: Ankur Sheth <asheth at ixiacom dot com>,"''gdb at sources dot redhat dot com' '" <gdb at sources dot redhat dot com>
- Date: Sun, 16 Jun 2002 23:44:26 -0400
- Subject: Re: gdbserver and multithreaded programs
- References: <9A9C83C019F35D47A570460E87D5D8AB027592DF@racerx.ixiacom.com>
On Fri, Jun 14, 2002 at 11:16:11PM -0700, Dan Kegel wrote:
> Daniel Jacobowitz wrote:
> > > ppc405 - worked on single threaded program, but on multithreaded
> > > program output zillions of
> > >
> > > Ignoring packet error, continuing...
> > > Ignoring packet error, continuing...
> > > as soon as we tried to step thru main.
> > >
> > > sh4 - worked fine on single threaded program, but on
> > > multithreaded program it output the following message.
> > >
> > > Program received signal SIG32, Real-time event 32.
> >
> > The "received signal SIG32" means that thread_db did not load. Most
> > likely this means GDB did not find your libraries. On ppc405 I'd guess
> > that it found an incorrect copy of the libraries. Are you setting
> > solib-absolute-prefix correctly?
>
> No, we weren't setting it at all. Thanks for the tip; works much
> better now on ppc405. I did see a strange message
> "Program received signal SIGTRAP, Trace/breakpoint trap."
> a few times, but in general I'm able to step through a program
> that creates lots of threads on ppc405 now. Huzzah!
> (Haven't tried sh4 again yet.)
Hmm, if you can make a simple program that reproduces the SIGTRAPs I
would greatly appreciate it. I'm pretty sure I committed the right
copy; I spent a long time trying to kill those things.
> Still not trivial to build and use in a cross-compiled environment
> (what is?), but a good FAQ ought to help that.
Documentation, documentation. And some more sanity checks. I'm
working on it.
--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer