Thread: RE: [HACKERS] How do I get the backend server into gdb?
The problem I need to debug won't allow me to do this. A Postgres
connection starts and then dies very quickly with a user authentication
error or database non existence error before I have a chance to attach to
the process via gdb. I need to find out why postgres will not allow my
Access97 connection to succeed. Pg_hba.conf appears to be configured
correctly (it was working and has not changed in past two months). I need
to have the new postgres session start up in debug.
-----Original Message-----From: The Hermit Hacker [SMTP:scrappy@hub.org]Sent: Wednesday, April 28, 1999 10:19
AMTo: Michael J DavisCc: pgsql-hackers@postgreSQL.orgSubject: RE: [HACKERS] How do I get the backend server
into
gdb?
You can attach to a running process using gdb... 'gdb -t <pid>' orsomething like that...its been awhile since I've used
it,sorry...
On Wed, 28 Apr 1999, Michael J Davis wrote:
> I need to debug this connection problem I am having with Access97.
My> question is how can I get the new Postgres backend that starts up
for Access> into debug (gdb)? I can get the PostMaster open in gdb.> > Thanks, Michael>
Marc G. Fournier ICQ#7615664 IRC
Nick: ScrappySystems Administrator @ hub.org primary: scrappy@hub.org secondary:
scrappy@{freebsd|postgresql}.org
There is some option that starts backends, and then sleeps waiting for a
gdb connection, or something like that.
Or you can add the sleep yourself.
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> The problem I need to debug won't allow me to do this. A Postgres
> connection starts and then dies very quickly with a user authentication
> error or database non existence error before I have a chance to attach to
> the process via gdb. I need to find out why postgres will not allow my
> Access97 connection to succeed. Pg_hba.conf appears to be configured
> correctly (it was working and has not changed in past two months). I need
> to have the new postgres session start up in debug.
>
> -----Original Message-----
> From: The Hermit Hacker [SMTP:scrappy@hub.org]
> Sent: Wednesday, April 28, 1999 10:19 AM
> To: Michael J Davis
> Cc: pgsql-hackers@postgreSQL.org
> Subject: RE: [HACKERS] How do I get the backend server into
> gdb?
>
>
> You can attach to a running process using gdb... 'gdb -t <pid>' or
> something like that...its been awhile since I've used it, sorry...
>
> On Wed, 28 Apr 1999, Michael J Davis wrote:
>
> > I need to debug this connection problem I am having with Access97.
> My
> > question is how can I get the new Postgres backend that starts up
> for Access
> > into debug (gdb)? I can get the PostMaster open in gdb.
> >
> > Thanks, Michael
> >
>
> Marc G. Fournier ICQ#7615664 IRC
> Nick: Scrappy
> Systems Administrator @ hub.org
> primary: scrappy@hub.org secondary:
> scrappy@{freebsd|postgresql}.org
>
>
>
-- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
Pennsylvania19026
Bruce Momjian wrote: > > There is some option that starts backends, and then sleeps > waiting for a > gdb connection, or something like that. > Why not just the following gdb postmaster Set one ore more breakpoints where you think the problem might be, then type 'run'. Start the client and with a bit of luck gdb will break at the breakpoint set. You may need to do this a couple of times until you have found the right area in the code. -------- Regards Theo