This is the mail archive of the
mailing list for the GDB project.
Re: in ?? ()
- To: Fernando Nasser <fnasser at cygnus dot com>
- Subject: Re: in ?? ()
- From: Mathieu Dube <mathieu_dube at videotron dot ca>
- Date: Fri, 2 Feb 2001 16:00:13 -0500
- Cc: gdb at sourceware dot cygnus dot com
- Organization: Mondo-live
- References: <0102021532070A.email@example.com> <3A7B1A28.533E0215@cygnus.com>
- Reply-To: mathieu_dube at videotron dot ca
On Fri, 02 Feb 2001, you wrote:
> Mathieu Dube wrote:
> > hi,
> > When I do a backtrace in gdb when my program crashes it says:
> > #0 0x400da0a4 in ?? ()
> > #1 0x8049e55 in main (argc=3, argv=0xbffff914) at therver.c:380
> > #2 0x400579ee in ?? ()
> > How can I figure out the ?? in line #0 and #2?? Or if I cant what is
> > that suppose to tell me about the crash?
> The ?? means that you don't have symbolic information for those addresses.
> As the address range is so different, it seems that it is some library,
> probably a DLL or something. The addresses even look like cygwin1.dll
> addresses but I am just guessing.
Theres no dll!, the app Im building is a multhreaded(POSIX) network server
it uses libpthread.so and also the postgresql C API which could be the problem
since that I get less problems when I take out the authentification(using a db)
in my program
> The truth is that you did not post enough information for people to
>be able to > help you. What host is this? Is this a native debugging session
>or some sort > of cross?
>Which version of things?
gdb5.0, postgres 7.0
>What commands have you used
I attach to the pid server when it gets where it crashes
I do continue and when it crashes I do bt which outputs the lines I wrote in my
>and what output > you got back from those commands?
> And what kind of program is this? What was it doing in line 380?
> As per your previous postings (each one with a little bit of information),
> it seems that there are threads involved.
> Fernando Nasser
> Red Hat - Toronto E-Mail: firstname.lastname@example.org
> 2323 Yonge Street, Suite #300
> Toronto, Ontario M4P 2C9