Bug #60509 [Csd->Fbk]: pcntl_signal doesn't decrease ref-count of old handler when setting SIG_DFL

Edit report at https://bugs.php.net/bug.php?id=60509&edit=1 ID: 60509 Updated by: jpauli@php.net Reported by: mplomer at gmx dot de Summary: pcntl_signal doesn't decrease ref-count of old handler when setting SIG_DFL -Status: Closed +Status: Feedback Type: Bug Package: PCNTL related Operating System: Debian Squeeze PHP Version: 5.3.8 Block user comment: N Private report: N New Comment: Please try using this snapshot: http://snaps.php.net/php5.5-latest.tar.gz For Windows: http://windows.php.net/snapshots/ Previous Comments: ------------------------------------------------------------------------ [2014-11-29 13:53:17] jpauli@php.net Automatic comment on behalf of jpauli Revision: http://git.php.net/?p=php-src.git;a=commit;h=19b5bc8ce22b1476eb084a8b64c137bb8b17d674 Log: Fix #60509, pcntl_signal doesn't decrease ref-count of old handler ------------------------------------------------------------------------ [2014-11-29 13:52:50] jpauli@php.net Automatic comment on behalf of jpauli Revision: http://git.php.net/?p=php-src.git;a=commit;h=19b5bc8ce22b1476eb084a8b64c137bb8b17d674 Log: Fix #60509, pcntl_signal doesn't decrease ref-count of old handler ------------------------------------------------------------------------ [2014-11-29 13:52:24] jpauli@php.net Automatic comment on behalf of jpauli Revision: http://git.php.net/?p=php-src.git;a=commit;h=19b5bc8ce22b1476eb084a8b64c137bb8b17d674 Log: Fix #60509, pcntl_signal doesn't decrease ref-count of old handler ------------------------------------------------------------------------ [2011-12-13 09:30:35] mplomer at gmx dot de Description: ------------ When overwriting an old signal handler (that references "$this" for example) with SIG_DFL, the reference counter on $this is not decreased, so when unsetting the object, it cannot be freed. My current workaround: When overwriting the signal handler with an empty function before ("function() {}"), the ref-count is correctly decreased (WTF?!), and the instance is immediately freed, when unsetting the object. Test script: --------------- class Test { public function __construct() { pcntl_signal(SIGUSR1, array($this, 'signalHandler'), false); //pcntl_signal(SIGUSR1, function() {}); // destruct works correctly when commenting in pcntl_signal(SIGUSR1, SIG_DFL); } public function signalHandler() { } public function __destruct() { echo '__destruct' . PHP_EOL; } } $test = new Test(); echo 'unsetting' . PHP_EOL; unset($test); echo 'end' . PHP_EOL; Expected result: ---------------- unsetting __destruct end Actual result: -------------- unsetting end __destruct ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=60509&edit=1