ID: 38577 User updated by: php at diptyque dot net Reported By: php at diptyque dot net -Status: Feedback +Status: Open Bug Type: Apache related Operating System: FreeBSD 4.4 PHP Version: 4.4.4 New Comment:
I'm not trying anything. You told me to download and install the latest CVS snapshot. That's what I did but the erratic function overloading behavior is still there. Considering no drastic changes have been made since v4.4.4 either at the Apache SAPI level (mod_php4.c) or in Mbstring (mbstring.c) source code, this isn't very surprising. Regarding Xdebug, this particular extension also overrides two core functions -- namely var_dump() and set_time_limit (). Don't you think it would be interesting to know if the function overloading that Xdebug performs is sticky or not when running under the Apache 1.3 SAPI? I have the strong feeling that the original PHP function table state is not restored properly by Mbstring but I don't have the time nor the resources needed to nail down further the origin of the leak -- i.e. the overridden functions stickiness or whatever you may call it. Previous Comments: ------------------------------------------------------------------------ [2006-09-07 16:48:46] [EMAIL PROTECTED] I'm not sure I understand what you're trying to do and to say. ------------------------------------------------------------------------ [2006-09-07 16:39:49] php at diptyque dot net FYI, I do *NOT* have any Zend or Xdebug extension installed... I have downloaded Xdebug only to compare its overriding technique with the one used in Mbstring extension. =begin [diptyque] % php -m [PHP Modules] bz2 ctype curl gd imap mbstring mysql openssl overload pcre posix readline session sqlite standard tokenizer xml zlib [Zend Modules] =end BTW, I compared source files for apache SAPI (./sapi/apache/mod_php4.c) and mbstring extension (./ext/mbstring/mbstring.c) between version 4.4.4 and latest stable version and did not find anything different (!?) ------------------------------------------------------------------------ [2006-09-07 15:25:39] [EMAIL PROTECTED] Please remove all zend_extensions, including XDebug and try again. ------------------------------------------------------------------------ [2006-09-07 15:14:49] php at diptyque dot net Antony, I'm not very familiar with Zend Engine 1.3 innards but I had a look at how Xdebug is overriding both var_dump() and set_time_limit() functions in PHP_RINIT_FUNCTION(xdebug) and how it does restore the original function pointers in PHP_RSHUTDOWN_FUNCTION(xdebug). Peeking at mbstring extension source code, this looks a bit more verbose and it doesn't fiddle directly with orig->internal_function.handler (!?) to restore the original function. Instead it calls subsequently zend_hash_update() and zend_hash_del() using the info it gathered inside its mb_overload_def struct... IMHO, mbstring ini settings are properly reset (please see http://bugs.php.net/bug.php?id=25753) but not the initial PHP function table state. ------------------------------------------------------------------------ [2006-09-07 09:29:53] php at diptyque dot net Sorry but it doesn't make it. Mbstring function overloading setting is unfortunately persistent once an Apache process has served content from a vhost where this ini parameter is assigned a value distinct from zero. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/38577 -- Edit this bug report at http://bugs.php.net/?id=38577&edit=1
