Re: gdbserver multithreaded debugging problem

[Cal Erickson <cerickson@mvista.com>]

Nik,
You are missing libthread_db.* in your LIBRAY PATH. If you had these
then you would not see the the SIG 32 messages.

Cal Erickson

nak26 wrote:

> Hi:
> 
> I am trying to use gdbserver to remotely debug a multithreaded application.
> 
> Remote host is a IA32, running MontaVista Linux 3.0 kernel v 2.4.18; gdbserver 
> from the 5.3 release tarball, patched with the PREPARE_TO_PROCEED patch, and 
> built on the remote host.
> 
> Local host is an IA32 machine, running RedHat 8.0, gdb v 5.2.1-4.
> 
> I get a "Real-time event 32"-signal as each thread is spun up, execution 
> stops, and I have to re-continue. After all the threads are created and I hit 
> a breakpoint, info thread only displays the main thread.
> 
> I don't see this problem while debugging with gdb (5.2.1) on the remote (and 
> the local) target
> .
> Is there anything I can do to solve the problem I am experiencing with 
> gdbserver?
> 
> Here's gdb's output when debugging remotely:
> --------------------------------------------
> 
> (gdb) target remote 192.168.139.14:8888
> Remote debugging using 192.168.139.14:8888
> 0x40001390 in ?? ()
> (gdb) b osevent.cxx:215
> Breakpoint 1 at 0x826dd03: file ../../common/osevent.cxx, line 215.
> (gdb) cont
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb) c
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb)
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb)
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb)
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb)
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb)
> Continuing.
> 
> Program received signal SIG32, Real-time event 32.
> 0x404b724d in ?? ()
> (gdb)
> Continuing.
> 
> Breakpoint 1, OsEventManagerClass::eventLoop() (this=0x89caf78) at 
> ../../common/osevent.cxx:215
> 215           if (pTimer) {
> (gdb) info thread
>   1 Thread 3860  OsEventManagerClass::eventLoop() (this=0x89caf78) at 
> ../../common/osevent.cxx:215
> 
> ----------------------------------------------
> 
> Thanks,
> --Nik
> 
> 
> 


-- 
===========================================================================
Cal Erickson                 MontaVista Software Inc.
Linux Consultant             1237 E. Arques Ave.
Phone (408) 328-0304         Sunnyvale CA 94085
Fax   (408) 328-9204         web http://www.mvista.com
===========================================================================