ID: 29549 Updated by: [EMAIL PROTECTED] Reported By: r dot korving at xit dot nl -Status: Open +Status: Feedback Bug Type: SimpleXML related Operating System: debian linux 2.4.26 kernel PHP Version: 5.0.0 New Comment:
Please try using this CVS snapshot: http://snaps.php.net/php5-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.0-win32-latest.zip Previous Comments: ------------------------------------------------------------------------ [2004-08-13 20:21:51] [EMAIL PROTECTED] looks like an engine bug. when it parsers the arguments for a function and tries to do its auto string conversion magic, the zval gets hosed since it uses the zval as both the read and write object for the cast_object call in zend_parse_arg_impl. simple script: <?php $xml = new SimpleXMLElement("<test/>"); str_split($xml); // any function requiring string paremeter var_dump($xml); // $xml is foobar at this point ?> ------------------------------------------------------------------------ [2004-08-13 12:34:33] [EMAIL PROTECTED] I don't know, if it's an Engine or a SimpleXML problem, but here's the backtrace to it #0 _efree (ptr=0xffffffff) at /opt/cvs/php5.0/Zend/zend_alloc.c:263 #1 0x001452f4 in _zval_ptr_dtor (zval_ptr=0xffffffef) at /opt/cvs/php5.0/Zend/zend_execute_API.c:391 #2 0x001452f4 in _zval_ptr_dtor (zval_ptr=0x1982538) at /opt/cvs/php5.0/Zend/zend_execute_API.c:391 #3 0x001728a0 in zend_do_fcall_common_helper (execute_data=0xbfffeb70, opline=0x2009f7c, op_array=0x19868e0) at /opt/cvs/php5.0/Zend/zend_execute.h:124 #4 0x0016effc in execute (op_array=0x19868e0) at /opt/cvs/php5.0/Zend/zend_execute.c:1400 #5 0x0015103c in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /opt/cvs/php5.0/Zend/zend.c:1061 #6 0x00119914 in php_execute_script (primary_file=0xbffff5b0) at /opt/cvs/php5.0/main/main.c:1627 #7 0x0017c548 in main (argc=2, argv=0xbffffaf4) at /opt/cvs/php5.0/sapi/cli/php_cli.c:943 ------------------------------------------------------------------------ [2004-08-06 15:24:06] r dot korving at xit dot nl Description: ------------ When I use the output of $xmlobject->xpath() in a preg_match("/whatever pattern/", $xpathoutput) it makes memory usage explode or the whole script segfaults. The problem can be manually solved by typecasting the $xpathoutput to a string, but nonetheless, a segfault should never ever be desired behaviour. In fact, in one case I actually saw PHP tried to allocate over 1 gigabyte of memory. Reproduce code: --------------- #!/usr/bin/php5 <? $xml = simplexml_load_file("test.xml"); $val = $xml->xpath("/rootelem/testelems"); for ($i=0; $i < 20; $i++) { if (preg_match("/abc/", $val[0])) echo "Y"; else echo "N"; } ?> test.xml: <rootelem> <testelems>this is one</testelems> <testelems>this is another one !</testelems> </rootelem> Expected result: ---------------- NNNNNNNNNNNNNNNNNNNN Actual result: -------------- NSegmentation fault ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=29549&edit=1
