FreeTDS Development Group

[Raymond R Rankins <rrr03 AT health.state.ny.us>]

Did some more digging into this today.

The problem appears to be related to the error handler defined in
handlers.c.
It reaches the code where it prints out the "DB-LIBRARY error:\n\t%s\n"
message string and the core dumps at some point after that.

Once I commented out the "dberrhandle(err_handler);" line in fisql.c so it
doesn't invoke the error handler defined in handlers.c, the segmentation
fault/core dump stopped occurring when an error is raised.

Now to figure out what it is about the error handler that's causing the
core dump.

-Ray

===============================================
Ray Rankins
rrr03 AT health.state.ny.us
(518) 474-1094




From:   Raymond R Rankins <rrr03 AT health.state.ny.us>
To:     FreeTDS Development Group <freetds AT lists.ibiblio.org>
Date:   05/11/2011 06:09 PM
Subject:        Re: [freetds] Segmentation Fault in error handler
Sent by:        freetds-bounces AT lists.ibiblio.org




Attached is the tdsdump file.

-Ray

(See attached file: freetds.log)



From:            Igor Korot <ikorot01 AT gmail.com>
To:              FreeTDS Development Group <freetds AT lists.ibiblio.org>
Date:            05/11/2011 05:44 PM
Subject:                 Re: [freetds] Segmentation Fault in error handler
Sent by:                 freetds-bounces AT lists.ibiblio.org



Hi,
Could you try to produce the TDSDUMP or run under gdb to see the backtrace?

Thank you.

On Wed, May 11, 2011 at 1:24 PM, Raymond R Rankins
<rrr03 AT health.state.ny.us> wrote:
>
> Sorry, forgot to mention, I'm running TDS version .91RC2
>
> Sybase TDS protocol version 5.0
> SQL Server TDS protocol version 8.0
>
> -Ray
>
>
>
>
> From:   Raymond R Rankins <rrr03 AT health.state.ny.us>
> To:     FreeTDS Development Group <freetds AT lists.ibiblio.org>
> Date:   05/11/2011 04:12 PM
> Subject:        [freetds] Segmentation Fault in error handler
> Sent by:        freetds-bounces AT lists.ibiblio.org
>
>
>
> I'm testing out fisql to run some queries and when there's an error with
> severity > 10 which invokes the error handler, it's causing a
segmentation
> fault and dumping the core.
> This is happening if I connect to SQL Server or to Sybase.
>
> Below are examples of what's happening:
>
> Error raised in SQL Server
> ----------------------------------------------
> Msg 2812, Level 16, State 62:
> Server 'CHPLUSSQL01', Line 1:
> Could not find stored procedure 'sp_modifystats'.
> DB-LIBRARY error:
>        General SQL Server error: Check messages from the SQL Server
> Segmentation Fault - core dumped
>
>
> Error raised in Sybase
> ----------------------------------------------
> Msg 2812, Level 16, State 5:
> Server 'CHPDEV', Line 1:
> Stored procedure 'sp_modstats' not found. Specify owner.objectname or use
> sp_help to check whether the object exists (sp_help may produce lots of
> output).
>
> DB-LIBRARY error:
>        General SQL Server error: Check messages from the SQL Server
> Segmentation Fault - core dumped
>
>
> My guess is this may be an issue with the default error handler in dblib?
>
> -Ray
>
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[attachment "graycol.gif" deleted by Raymond R
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