Date: Sun, 5 Nov 2000 20:00:04 -0800 From: Jason Evans <jasone@canonware.com> To: andrew@ugh.net.au Cc: freebsd-hackers@freebsd.org Subject: Re: gdb & threaded application Message-ID: <20001105200004.O4044@canonware.com> In-Reply-To: <Pine.BSF.4.21.0011060126430.35048-100000@starbug.ugh.net.au>; from andrew@ugh.net.au on Mon, Nov 06, 2000 at 01:33:21AM %2B1000 References: <Pine.BSF.4.21.0011060126430.35048-100000@starbug.ugh.net.au>
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On Mon, Nov 06, 2000 at 01:33:21AM +1000, andrew@ugh.net.au wrote:
> Hi,
>
> I have a program compiled with -pthread and I'm trying to use gdb to debug
> it. I run the program in one window and then try to attach to it from
> another. I have put a sleep 10 in the program so I can catch it before it
> enters the section I want to debug. This is what I get:
>
> Attaching to program: /usr/home/andrew/work/msgs2/msgs, process 10063
> Reading symbols from /usr/lib/libc_r.so.4...done.
> Reading symbols from /usr/libexec/ld-elf.so.1...done.
> 0x280b7368 in _thread_sys_poll () from /usr/lib/libc_r.so.4
^^^^^^^^^^^
For reasons that I don't entirely understand, using gdb with dynamically
linked applications usually produces very undesireable (often totally
incorrect) results on FreeBSD. I don't know that this is the problem, but
the first thing I'd do if I were you would be to link statically.
Jason
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