This is the mail archive of the
gdb@sources.redhat.com
mailing list for the GDB project.
RE: gdbserver and multithreaded programs
- From: Dan Kegel <dkegel at ixiacom dot com>
- To: 'Daniel Jacobowitz ' <drow at mvista dot com>, Ankur Sheth <asheth at ixiacom dot com>
- Cc: "''gdb at sources dot redhat dot com' '" <gdb at sources dot redhat dot com>, Dan Kegel <dkegel at ixiacom dot com>
- Date: Fri, 14 Jun 2002 23:16:11 -0700
- Subject: RE: gdbserver and multithreaded programs
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.)
Still not trivial to build and use in a cross-compiled environment
(what is?), but a good FAQ ought to help that.
Thanks for the fast help!
- Dan