Re: GDB problem on RH AS/Clone(). Plz help.

[pras at cycloeastern dot com]

Bump ...

Can somebody please guide me with this clone() issue in gdb or am I on the wrong mailing list?


On Wed, Apr 13, 2005 at 11:18:16AM -0400, pras@cycloeastern.com wrote:
> All,
> 
> This is my first email to this list.
> 
> I work for a company in that has started using Linux for one of its projects
> that has traditionally in the past been running on all other big iron *nixes.
> 
> We just got our first build on RH Enterprise Linux AS release 3 (Taroon Update 4),
> and gdb attempts fail miserably.
> 
> Background info:
> 
> The product is written in C/C++ and is compiled with gcc 3.2.3
> The gdb version is as follows:
> GNU gdb Red Hat Linux (6.1post-1.20040607.52rh)
> 
> I am able to attach to a process and see the stack using backtrace or bt. frame command
> works and even break command works.
> 
> 
> When I try to do a 'cont', the server process which is supposed to execute continuously exists normally.
> 
> This is what I see
> 
> (gdb) cont
> Continuing.
> [New Thread -1245635664 (LWP 8226)]
> [Thread -1220756560 (LWP 7953) exited]
> 
> Program exited normally.
> (gdb)
> 
> The program is multithreaded and it fails. People at my local LUG suggested that I try to look up problems with
> clone() system call and GDB. They suggested using PTHREADS could solve the problem. We DO use pthreads and here
> is the stack(i.e. backtrace). I have set a break point on clone(). Shortly after the program just exits.
> 
> #0  0x0365e9d0 in clone () from /lib/tls/libc.so.6
> #1  0x0040a8d7 in do_clone () from /lib/tls/libpthread.so.0
> #2  0x0040a526 in create_thread () from /lib/tls/libpthread.so.0
> #3  0x00409f87 in pthread_create@@GLIBC_2.1 () from /lib/tls/libpthread.so.0
> #4  0x0040a01c in pthread_create@GLIBC_2.0 () from /lib/tls/libpthread.so.0
> #5  0x004a9f3a in VISThread::_create_thread () from /usr/BDP/lib/libvport_r.so
> #6  0x004aa0bc in VISThread::run () from /usr/BDP/lib/libvport_r.so
> #7  0x0142a588 in VISManager::cleanup () from /usr/BDP/lib/liborb_r.so
> #8  0x0142b063 in VISManager::sig_handler () from /usr/BDP/lib/liborb_r.so
> #9  0x0142b4a1 in VISThreadSignal::begin () from /usr/BDP/lib/liborb_r.so
> #10 0x004a8749 in VISThread::_start () from /usr/BDP/lib/libvport_r.so
> #11 0x00409dec in start_thread () from /lib/tls/libpthread.so.0
> #12 0x0365ea2a in clone () from /lib/tls/libc.so.6
> 
> 
> I downloaded 6.3 gdb and compiled it with no options. GDB failed again under that. Please let me know what can be done.
> 
> Do you guys know what might be going wrong ?
> 
> -- 
> ________________________________________________________________________
> Prasanna Subash            | WARNING TO ALL PERSONNEL:  Firings will
> pras@cycloeastern.com      | continue until morale improves. 
>                            | 
>                            | 
> ________________________________________________________________________

-- 
________________________________________________________________________
Prasanna Subash            | The only recomendation is "dont".   - Alan 
pras@cycloeastern.com      | Cox giving some recommendations for
                           | binary-only drivers 
                           | 
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