Prev: [HACKERS] Naming of new EXCLUDE constraints
Next: non-reproducible failure of random test on HEAD
From: tomas on 13 Apr 2010 00:28
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Mon, Apr 12, 2010 at 08:31:38PM -0700, Murali M. Krishna wrote:
> Hello:
>
> I am brand new to Postgresql.
>
> I ran the following commands.
> ./configure
> gmake
> su
> gmake install
> adduser postgres
> mkdir /usr/local/pgsql/data
> chown postgres /usr/local/pgsql/data
> su - postgres
> /usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data
> /usr/local/pgsql/bin/postmaster -D /usr/local/pgsql/data >logfile 2>&1 &
> /usr/local/pgsql/bin/createdb test
> /usr/local/pgsql/bin/psql test
>
> I would like to start using gdb.
>
> What is the simplest way of doing this? I read the instructions
> on this page
>
> http://sites.google.com/a/cs.berkeley.edu/cs186-fa09/home/assignments/assignment2/pggdb
>
> , but this is what I get.
>
>
> gdb) attach 1731
> Attaching to program: /usr/local/pgsql/bin/postgres, process 1731
> ptrace: Operation not permitted.
> (gdb) break cost_seqscan
> Breakpoint 1 at 0x81cdf97: file costsize.c, line 163.
> (gdb) c
> The program is not being run.

Hm. Seems you got the right PID (gdb finds the executable after all).
Are you perhaps running under SELinux? (i just boldly assumed some
GNU/Linux). Which distribution, which kernel version (there seems to be
a bug in 2.4-ish Linux kernels which manifests itself like that, but
that's quite a while ago).

Next time, please tell us what OS is under you (although it might be fun
to watch people make wild guesses :)

Regards
- -- tomás
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFLw/LTBcgs9XrR2kYRArYMAJ9JHu/Sl5JWSAv77om9HXHIzZtrDACZAWWu
fpk1yLbio8KOcWjTEWCXrK4=
=z0qo
-----END PGP SIGNATURE-----

--
Sent via pgsql-hackers mailing list (pgsql-hackers(a)postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers

From: Tom Lane on 13 Apr 2010 03:09
"Murali M. Krishna" <murali1729(a)yahoo.com> writes:
> I would like to start using gdb.
> ...
> , but this is what I get.

> gdb) attach 1731
> Attaching to program: /usr/local/pgsql/bin/postgres, process 1731
> ptrace: Operation not permitted.

Try running gdb as the postgres user, ie, su to postgres first.
If that doesn't work, see if it works after disabling selinux
(and if so, file a bug, because selinux shouldn't prevent it).

regards, tom lane

--
Sent via pgsql-hackers mailing list (pgsql-hackers(a)postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers

 | 
Pages: 1
Prev: [HACKERS] Naming of new EXCLUDE constraints
Next: non-reproducible failure of random test on HEAD