From: bugs dot php dot net at ss dot chernousov dot net Operating system: Any PHP version: 5.5.1 Package: Scripting Engine problem Bug Type: Bug Bug description:Memleak:Circular references on callbacks can't be resolved by Garbage Collector
Description: ------------ GC fails to resolve the circular reference if object A retains a reference to a callback in object B and object B retains a reference to object A. Both objects leak. Native PHP stuff like SPL iterators with callbacks and Stream callbacks are also vulnerable to this problem. This does not apply to userland PHP objects (i.e. objects of classes that were defined in PHP scripts by a user). I provided a test script with a number of tests, including SPL iterators with callbacks, Stream callbacks, as well as 3rd-party extensions like pecl-event, pecl-ev, pecl-libevent, pecl-eio. Test script: --------------- https://gist.github.com/5lava/53aa2e53c7f8c658f045 Expected result: ---------------- ==== NULL ==== ==== GC ==== Obj::__destruct ==== THE END ==== or ==== NULL ==== Obj::__destruct ==== GC ==== ==== THE END ==== Actual result: -------------- ==== NULL ==== ==== GC ==== ==== THE END ==== Obj::__destruct -- Edit bug report at https://bugs.php.net/bug.php?id=65387&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=65387&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=65387&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=65387&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=65387&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=65387&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=65387&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=65387&r=needscript Try newer version: https://bugs.php.net/fix.php?id=65387&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=65387&r=support Expected behavior: https://bugs.php.net/fix.php?id=65387&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=65387&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=65387&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=65387&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65387&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=65387&r=dst IIS Stability: https://bugs.php.net/fix.php?id=65387&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=65387&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=65387&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=65387&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=65387&r=mysqlcfg
