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[2004-03-15 12:32 UTC] 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
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Last updated: Sat Nov 01 03:00:01 2025 UTC |
Did a complete cleanup on PHP and installed the new Version: $ rm /usr/bin/php $ rm /usr/lib/apache2/libphp5.so $ rm -rf /usr/lib/php -> CVS checkout (deleted the sourcedir before) -> newly compiled with options like above ...same error :( 'php -v' says: PHP 5.0.0RC1-dev (cli) (built: Mar 17 2004 19:51:01) Copyright (c) 1997-2004 The PHP Group Zend Engine v2.0.0-dev, Copyright (c) 1998-2004 Zend Technologies Backtrace: (gdb) run segfault_mysql_free_result.php Starting program: /usr/bin/php segfault_mysql_free_result.php 1 GO 2 OK Program received signal SIGSEGV, Segmentation fault. 0x082817bc in _zval_ptr_dtor (zval_ptr=0xbfffd37c) at /home/goliath/downloads/php/php-src/Zend/zend_execute_API.c:385 385 (*zval_ptr)->refcount--; (gdb) bt #0 0x082817bc in _zval_ptr_dtor (zval_ptr=0xbfffd37c) at /home/goliath/downloads/php/php-src/Zend/zend_execute_API.c:385 #1 0x0828c438 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/goliath/downloads/php/php-src/Zend/zend.c:1084 #2 0x08252c3f in php_execute_script (primary_file=0xbffff6d0) at /home/goliath/downloads/php/php-src/main/main.c:1628 #3 0x082b75fc in main (argc=2, argv=0xbffff754) at /home/goliath/downloads/php/php-src/sapi/cli/php_cli.c:943I think this "latest" snapshot is nothing more than a fresh CVS checkout, so I did the checkout first. ;-) Same Error: (gdb) run segfault_mysql_free_result.php Starting program: /usr/bin/php segfault_mysql_free_result.php 1 GO 2 OK Program received signal SIGSEGV, Segmentation fault. 0x08282c9c in _zval_ptr_dtor (zval_ptr=0xbfffd36c) at /home/goliath/downloads/php/php-src/Zend/zend_execute_API.c:389 389 (*zval_ptr)->refcount--; (gdb) bt #0 0x08282c9c in _zval_ptr_dtor (zval_ptr=0xbfffd36c) at /home/goliath/downloads/php/php-src/Zend/zend_execute_API.c:389 #1 0x0828dd08 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/goliath/downloads/php/php-src/Zend/zend.c:1095 #2 0x08253e0f in php_execute_script (primary_file=0xbffff6c0) at /home/goliath/downloads/php/php-src/main/main.c:1630 #3 0x082b988c in main (argc=2, argv=0xbffff744) at /home/goliath/downloads/php/php-src/sapi/cli/php_cli.c:943 After that I tried the "latest" Snapshot: The same :( (gdb) run segfault_mysql_free_result.php Starting program: /home/goliath/downloads/php/latest/php5-200404091030/sapi/cli/php /home/goliath/Work/Homepages/Projekte/molp/tests/segfault_mysql_free_result.php 1 GO 2 OK Program received signal SIGSEGV, Segmentation fault. 0x08282b9c in _zval_ptr_dtor (zval_ptr=0xbfffd2cc) at /home/goliath/downloads/php/latest/php5-200404091030/Zend/zend_execute_API.c:389 389 (*zval_ptr)->refcount--; (gdb) bt #0 0x08282b9c in _zval_ptr_dtor (zval_ptr=0xbfffd2cc) at /home/goliath/downloads/php/latest/php5-200404091030/Zend/zend_execute_API.c:389 #1 0x0828dc08 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/goliath/downloads/php/latest/php5-200404091030/Zend/zend.c:1095 #2 0x08253d1f in php_execute_script (primary_file=0xbffff620) at /home/goliath/downloads/php/latest/php5-200404091030/main/main.c:1630 #3 0x082b978c in main (argc=2, argv=0xbffff6a4) at /home/goliath/downloads/php/latest/php5-200404091030/sapi/cli/php_cli.c:943 I tried it on another Machine with actual PHP5-CVS Sources, it runs there. So the Problem must be somewhere in my System libs or something like that. I'm using: Linux 2.6.5 gcc (GCC) 3.3.2 20031218 ...for more version-numbers simply ask. (other machine uses Linux 2.4.*)