#27608 [Opn->Csd]: mysql_free_result causes segfault with invalid result and exceptionerrorhandler
by other posts by this author
Mar 16 2004 10:39PM messages near this date
#27608 [Opn->Fbk]: mysql_free_result causes segfault with invalid result and exceptionerrorhandler
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[PHP-DEV] No static method callbacks anmore?
ID: 27608
Updated by: iliaa@[...].net
Reported By: david dot danier at team23 dot de
-Status: Open
+Status: Closed
Bug Type: MySQL related
Operating System: Gentoo Linux 1.4
PHP Version: 5CVS-2004-03-15 (dev)
New Comment:
This bug has been fixed in CVS.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
No longer crashes with latest CVS.
Previous Comments:
------------------------------------------------------------------------
[2004-03-15 12:32:21] david dot danier at team23 dot de
Description:
------------
We have a class that catches the result of mysql_query (this here in
the example is minimal). In the __descruct()-method it should do an
mysql_free_result(). The errorhandler
throws an exception. Now, if we do an INSERT the
mysql_free_result()-function gives an error (it MUST give an error,
because mysql_query() gives us no valid result if we use INSERT), this
error is passed to error() whith should throw an exception. But it
creates a segmentation fault. :-(
Other exceptions thrown by the error()-function are working perfectly.
SELECT-statements are working. (like they should do)
PHP-Version:
CVS 2004-03-07
(reproduced with CVS 2004-03-15)
Configured with (taken from the PHP4-ebuild, but modified):
./configure --prefix=/usr --host=i686-pc-linux-gnu
--mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share
--sysconfdir=/etc --localstatedir=/var/lib --with-apxs2=/usr/sbin/apxs2
--with-ndbm=/usr --with-db4=/usr --with-mcrypt=/usr --with-mhash=/usr
--without-interbase --without-ming --without-swf --without-sybase
--with-gdbm=/usr --with-java=/opt/blackdown-jdk-1.4.1 --without-mcal
--without-unixODBC --without-pgsql --without-snmp
--with-xpm-dir=/usr/X11R6 --with-pdflib=/usr --with-gd
--enable-gd-native-ttf --with-png=/usr --with-png-dir=/usr
--with-jpeg=/usr --with-jpeg-dir=/usr --enable-exif --with-tiff=/usr
--with-tiff-dir=/usr --with-mysql=/usr
--with-mysql-sock=/var/run/mysqld/mysqld.sock --with-freetype-dir=/usr
--with-ttf=/usr --with-t1lib=/usr --with-gettext --with-qtdom=/usr/qt/3
--with-pspell=/usr --with-openssl=/usr --with-imap=/usr --without-ldap
--with-dom=/usr --with-dom-xslt=/usr --with-dom-exslt=/usr
--without-kerberos --with-pam --disable-memory-limit --disable-ipv6
--without-yaz --without-curl --enable-dbx --with-imap-ssl
--with-zlib=/usr --with-zlib-dir=/usr --with-sablot=/usr --enable-xslt
--with-xslt-sablot --with-xmlrpc --enable-wddx --with-xml
--enable-mbstring=all --enable-mbregex --with-bz2=/usr
--with-crack=/usr --with-cdb --enable-pcntl --enable-bcmath
--enable-calendar --enable-dbase --enable-filepro --enable-ftp
--with-mime-magic --enable-sockets --enable-sysvsem --enable-sysvshm
--enable-sysvipc --with-iconv --enable-shmop --enable-dio --enable-yp
--without-ncurses --without-readline --enable-inline-optimization
--enable-track-vars --enable-trans-sid --enable-versioning
--with-config-file-path=/etc/php/apache2-php5
php.ini:
not changed
Reproduce code:
---------------
<?php
class result
{
var $result;
public function __construct($result)
{
if (!$result)
{
die(mysql_error());
}
echo 'GO ';
$this-> result = $result;
}
public function __destruct()
{
echo 'OK ';
mysql_free_result($this-> result);
}
}
function error($errno, $errstr, $errfile, $errline)
{
throw new Exception();
}
set_error_handler('error', E_ALL);
$db = mysql_connect('localhost', 'default');
mysql_select_db('test', $db);
echo '1 '; // only to get the position the error happens
$test = new result(mysql_query('INSERT INTO blafasl SET
text="segfault!"', $db));
echo '2 ';
unset($test); // if we don't unset $test PHP gives an exception error
echo '3 ';
?>
Expected result:
----------------
Errormessage about uncought exception.....
Actual result:
--------------
(gdb) bt
#0 0x082814dc in _zval_ptr_dtor (zval_ptr=0xbfffd40c)
at /home/goliath/downloads/php/php-src/Zend/zend_execute_API.c:356
#1 0x0828c148 in zend_execute_scripts (type=8, retval=0x0,
file_count=3)
at /home/goliath/downloads/php/php-src/Zend/zend.c:1082
#2 0x08252b5f in php_execute_script (primary_file=0xbffff760)
at /home/goliath/downloads/php/php-src/main/main.c:1655
#3 0x082b728c in main (argc=2, argv=0xbffff7e4)
at /home/goliath/downloads/php/php-src/sapi/cli/php_cli.c:943
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=27608&edit=1
Thread:
david dot danier at team23 dot de
bobbyp_21 at hotmail dot com
david dot danier at team23 dot de
david dot danier at team23 dot de
david dot danier at team23 dot de
david dot danier at team23 dot de
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