FreeTDS Development Group

["ZIGLIO, Frediano, VF-IT" <Frediano.Ziglio AT vodafone.com>]

> 
> On Mon, May 09, 2005 at 02:05:17PM +0200, ZIGLIO, Frediano, 
> VF-IT wrote:
> 
> > Are you using current CVS? Do you call dbexit while other thread are
> > processing data? Try to remove dbexit call with current 
> CVS. Where does
> 
> Of course not! That would most certainly result in a 
> disaster. The version 
> of FreeTDS I use currently is a heavily patched 0.63.
> 

Oh, I noted in your patch that in dbclose you call dblib_del_connection
after tds_free_socket, this can lead to possible problems, imagine:
- dbclose calls tds_free_socket
- another thread call dbopen, tds_alloc_socket return same pointer and
add to list with dblib_add_connection
- dbclose call dblib_del_connection with saved pointer removing a
correct connection

I wrote a small test to test current CVS. It works (attached). Sometimes
a connection fails (I think server don't accept all that connection so
faster). No leaks or memory detected on test (only small leaks removed
if connection fails, some error on pthread/glibc perhaps false errors).

freddy77

Attachment: thread.c.gz
Description: thread.c.gz