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Date: Tue, 27 May 2003 20:35:37 +0200 (CEST)
To: Michael Mauch <michael.mauch@gmx.de>
cc: internals@lists.php.net
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Message-ID: <20030527202650.K402@worf.jawa.at>
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Subject: Re: [PHP-DEV] Re: 4.3.2RC4 OCI8 crash
From: mbretter@jawa.at (Michael Bretterklieber)

On Tue, 27 May 2003, Michael Mauch wrote:

> Michael Bretterklieber wrote:
>
> > we discovered a crash using 4.3.2RC4 with oci8, here's the bt:
>
> Is your Apache linked to pthread, like it's written on
> <http://www.php.net/oci8>?
sure, and all other neat things like library-preload, etc.

we usualy start this script with the cli-php, but sometimes also from
apache.

>
> And your extension_dir .../no-debug-non-zts-20020429
> is probably the wrong one, as you are using --enable-debug.
>
we don't load any extensions dynamicaly (all exts are staticaly
compiled in) and usualy we use a non debug-build :-)

however we could workaround this, we had a function like this:

function foo()
{
    $db = new DB;
    $db->query(..)
    ..
}

this function was invoked several times, and our database-objects
connected also several times to oracle, then I declared $db static:
function foo()
{
    static $db;
    $db = new DB;
    $db->query(..)
    ..
}

et voila, the script didn't crashed anymore :-)

It looks like that the oci extension has some bugs in freeing resources,
because according to the bt, the oci module freees an already freeed
resource, if I'm right, or maybe a problem with the reference counting,
...

tomorrow I can send the output with ociinternaldebug(true)

another hint, I tried all php versions down to 4.2.1, and all versions
caused the script to crash.

bye,
--
------------------------------- ----------------------------------
Michael Bretterklieber          - http://www.bretterklieber.com
JAWA Management Software GmbH   - http://www.jawa.at
Tel: ++43-(0)316-403274-12      - GSM: ++43-(0)676-84 03 15 712
------------------------------- ----------------------------------
"...the number of UNIX installations has grown to 10, with more
expected..." - Dennis Ritchie and Ken Thompson, June 1972