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Re: gdbserver multithreaded debugging problem


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
===========================================================================


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