#42317 [Fbk]: The JVM cores in at _zval_ptr_dtor()

ID: 42317 Updated by: jani@php.net Reported By: jfclere at gmail dot com Status: Feedback Bug Type: Reproducible crash Operating System: RHEL 5 + JRockit PHP Version: 5.2.3 New Comment: Also, you should provide any patches against the latest sources: http://snaps.php.net/php5.2-latest.tar.gz Please try the snapshot first (without any patches!). Previous Comments: ------------------------------------------------------------------------ [2007-08-16 22:35:55] jani@php.net I'm more interested on what platform and configuration you need this "fix" since it's not proper fix. ------------------------------------------------------------------------ [2007-08-16 14:29:25] jfclere at gmail dot com If *zval_ptr is NULL the actual code in php-5.2.3/Zend/zend_execute_API.c will core on some platforms This is fixed by applying the following patch: +++ --- php-5.2.3/Zend/zend_execute_API.c 2007-08-16 08:12:59.927931000 -0400 +++ php-5.2.3/Zend/zend_execute_API.c 2007-08-16 10:12:26.919010000 -0400 @@ -406,6 +406,8 @@ ZEND_API void _zval_ptr_dtor(zval **zval_ptr ZEND_FILE_LINE_DC) { + if (*zval_ptr == NULL) + return; #if DEBUG_ZEND>=2 printf("Reducing refcount for %x (%x): %d->%d\n", *zval_ptr, zval_ptr, (*zval_ptr)->refcount, (*zval_ptr)->refcount-1); #endif +++ ------------------------------------------------------------------------ [2007-08-16 12:02:42] jfclere at gmail dot com Description: ------------ When accessing to a php page via our php servlet on IA64 with JRockit 1.5.x we get a core. Reproduce code: --------------- That is an embbedded php in a JVM. Any php code causes the problem. Expected result: ---------------- A page to be displayed. Actual result: -------------- +++ Thread Stack Trace: at _zval_ptr_dtor(zend_execute_API.c:412)@0x4a520e80 at zend_do_fcall_common_helper_SPEC(zend_execute.h:155)@0x4a59f1a0 at execute(zend_vm_execute.h:92)@0x4a59e4d0 at zend_do_fcall_common_helper_SPEC(zend_vm_execute.h:234)@0x4a59ec80 at execute(zend_vm_execute.h:92)@0x4a59e4d0 at zend_execute_scripts(zend.c:1135)@0x4a54d560 at php_execute_script(main.c:1794)@0x4a4984a0 at Java_org_jboss_web_php_Handler_php()@0x45372770 +++ The problem is fixed by adding in _zval_ptr_dtor: +++ if (*zval_ptr == NULL) return; +++ ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=42317&edit=1