#37458 [NEW]: XPath Memory Leak

From: lars dot kirchhoff at unisg dot ch Operating system: Linux PHP version: 5.1.4 PHP Bug Type: DOM XML related Bug description: XPath Memory Leak Description: ------------ If xpath->query is used in combination with namespaces in the xml document it produces a memory leak. The memory leak couldn't be identified with memory_get_usage. Only top could show us the raising memory usage. Reproduce code: --------------- #!/usr/local/apache2/bin/php <?php $xml_str = '<?xml version="1.0" encoding="UTF-8"?> <items xmlns:a="http://www.example.org/" xmlns:b="http://www.example2.org/" xmlns:c="http://www.example3.org/" > <header>Item1</header> <item>Data</item> </items> '; $xml_dom = DomDocument::loadXML( $xml_str ); $xpath = new domXPath( $xml_dom ); for( $i=0; $i< 1000000; $i++ ) { $node_list = $xpath->query( '/*' ); } ?> Expected result: ---------------- The memory usage of the above code WITHOUT the namespace definition is 1.1% (using top). Actual result: -------------- The memory usage of the above code WITH the namespace definition is starting by 1.1% and raising up to 7.4%(using top). -- Edit bug report at http://bugs.php.net/?id=37458&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=37458&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=37458&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=37458&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=37458&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=37458&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=37458&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=37458&r=needscript Try newer version: http://bugs.php.net/fix.php?id=37458&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=37458&r=support Expected behavior: http://bugs.php.net/fix.php?id=37458&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=37458&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=37458&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=37458&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37458&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=37458&r=dst IIS Stability: http://bugs.php.net/fix.php?id=37458&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=37458&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=37458&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=37458&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=37458&r=mysqlcfg