From: Daniel Jacobowitz <drow@false.org>
To: Arvid Brodin <arvid.brodin@enea.com>
Cc: gdb@sourceware.org
Subject: Re: Problem debugging multi-threaded application
Date: Mon, 21 Jan 2008 18:35:00 -0000 [thread overview]
Message-ID: <20080121183517.GA28048@caradoc.them.org> (raw)
In-Reply-To: <4794E3DD.2030909@enea.com>
On Mon, Jan 21, 2008 at 07:26:37PM +0100, Arvid Brodin wrote:
> If I invoke gdb under strace, i.e. 'strace -f -o strace-out.txt gdb
> <my-program>'
Don't do that :-) strace and gdb both use the ptrace interface; if
you tell strace to follow children with -f, then it will win and
gdb will not be able to debug the program it started.
> The problem exists on these platforms:
Since the problem exists on older platforms and not on newer ones, it
may be a bug in the Linux kernel or glibc which has since been fixed.
GDB is very sensitive to such bugs.
> I have no idea if this is a bug in gdb, if we do something bad in
> our program, if it is a bug in nptl, or ...
It sounds sort of like a problem with job control and terminal groups,
but I'm not sure I have enough to guess... can you run it and use the
gdb "attach" command?
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2008-01-21 18:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-21 18:27 Arvid Brodin
2008-01-21 18:35 ` Daniel Jacobowitz [this message]
2008-01-22 11:56 ` Arvid Brodin
2008-01-29 15:36 ` Arvid Brodin
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