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[2007-06-01 15:48 UTC] christian dot kaps at imaxx21 dot com
Description: ------------ Hi I get a segmentation fault error in My apache logs. The problem is that I can reprocude the error in our environment but i can`t locate the error in the script. I hope the backtrace helps. Actual result: -------------- Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1216653632 (LWP 13009)] zend_hash_destroy (ht=0x844562b) at /usr/src/php-5.2.3/Zend/zend_hash.c:524 524 p = p->pListNext; (gdb) bt #0 zend_hash_destroy (ht=0x844562b) at /usr/src/php-5.2.3/Zend/zend_hash.c:524 #1 0xb74bf853 in zend_object_std_dtor (object=0x8445b0c, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:45 #2 0xb74bf889 in zend_objects_free_object_storage (object=0x8445b0c, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:122 #3 0xb74c3056 in zend_objects_store_del_ref_by_handle (handle=70, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:206 #4 0xb74c30af in zend_objects_store_del_ref (zobject=0x8445758, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:168 #5 0xb74a3c39 in _zval_dtor_func (zvalue=0x8445758) at /usr/src/php-5.2.3/Zend/zend_variables.c:52 #6 0xb7497058 in _zval_ptr_dtor (zval_ptr=0x8432ef0) at /usr/src/php-5.2.3/Zend/zend_variables.h:35 #7 0xb74af266 in zend_hash_destroy (ht=0xb6c66fa4) at /usr/src/php-5.2.3/Zend/zend_hash.c:526 #8 0xb74bf853 in zend_object_std_dtor (object=0x842d3d8, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:45 #9 0xb74bf889 in zend_objects_free_object_storage (object=0x842d3d8, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:122 #10 0xb74c3056 in zend_objects_store_del_ref_by_handle (handle=65, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:206 #11 0xb74c30af in zend_objects_store_del_ref (zobject=0x8431da0, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:168 #12 0xb74a3c39 in _zval_dtor_func (zvalue=0x8431da0) at /usr/src/php-5.2.3/Zend/zend_variables.c:52 #13 0xb7497058 in _zval_ptr_dtor (zval_ptr=0xb6c3cbc0) at /usr/src/php-5.2.3/Zend/zend_variables.h:35 #14 0xb74af266 in zend_hash_destroy (ht=0xb6c3c858) at /usr/src/php-5.2.3/Zend/zend_hash.c:526 #15 0xb74bf853 in zend_object_std_dtor (object=0xb6c42178, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:45 #16 0xb74bf889 in zend_objects_free_object_storage (object=0xb6c42178, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects.c:122 #17 0xb74c2b44 in zend_objects_store_free_object_storage (objects=0x81e4d70, tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_objects_API.c:89 #18 0xb74976b8 in shutdown_executor (tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend_execute_API.c:299 #19 0xb74a4339 in zend_deactivate (tsrm_ls=0x818c650) at /usr/src/php-5.2.3/Zend/zend.c:860 #20 0xb745badc in php_request_shutdown (dummy=0x0) at /usr/src/php-5.2.3/main/main.c:1317 #21 0xb752607b in php_handler (r=0x83592f0) at /usr/src/php-5.2.3/sapi/apache2handler/sapi_apache2.c:463 #22 0x08079099 in ap_run_handler () #23 0x0807c3e1 in ap_invoke_handler () #24 0x0808947a in ap_internal_redirect () #25 0xb7782d10 in ?? () from /usr/lib/apache2/modules/mod_rewrite.so #26 0x083592e0 in ?? () #27 0x08350cc0 in ?? () #28 0x00000000 in ?? () PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Thu Oct 30 05:00:01 2025 UTC |
Sorry for my poor englisch. I think this script is the trigger for this problem. But it is not the only one. I can`t say what the other is!? <?php class Config_SimpleXML extends SimpleXMLIterator { public function xpath($query, $index = null) { $result = parent::xpath($query); if (!$result) { return array(); } elseif (is_numeric($index)) { return $result[(int) $index]; } return $result; } public function parent() { $parent = $this->xpath('parent::*', 0); return $parent; } public function removeChild(Config_SimpleXML $child) { $cnt = 0; $childXml = $child->asXml(); $this->rewind(); while ($this->valid()) { if ($childXml === $this->current()->asXml()) { if (isset($this->{$this->key()}->{$cnt})) { unset($this->{$this->key()}->{$cnt}); } else { unset($this->{$this->key()}); } break; } $cnt++; $this->next(); } $this->rewind(); } } $xml = '<config><parent><child>text</child></parent></config>'; $xml = simplexml_load_string($xml, 'Config_SimpleXML'); $element = $xml->xpath('.//child', 0); $element->parent()->removeChild($element); ?> I use this to remove a node from an xml document. When i use the dom object to remove the node, the error doesn`t occur. What I can say is that the error occurs not ever when i call the removeChild method. I have a script which has 2 calls of this method. The first call is ok the second throws this error. Whereat not the call himself is the segfault trigger, but in our environment where i can reproduce the error it is a exit statement that throws the segfault error. A downgrade to version 5.2.2. fix this issue. I can remember that in version 5.1.6 the error occurs too.