Bug #69549 [Ana->Csd]: Memory leak with opcache.optimization_level=0xFFFFFFFF

Edit report at https://bugs.php.net/bug.php?id=69549&edit=1 ID: 69549 Updated by: dmitry@php.net Reported by: naoki-kawamukai at cybozu dot co dot jp Summary: Memory leak with opcache.optimization_level=0xFFFFFFFF -Status: Analyzed +Status: Closed Type: Bug Package: opcache Operating System: Debian 7.8 PHP Version: 5.5Git-2015-04-30 (Git) Assigned To: dmitry Block user comment: N Private report: N New Comment: Automatic comment on behalf of dmitry@zend.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=8026001943109dea3f908b8dd0720a0de9781af6 Log: Fixed bug #69549 (Memory leak with opcache.optimization_level=0xFFFFFFFF) Previous Comments: ------------------------------------------------------------------------ [2015-04-30 17:06:18] laruence@php.net A quick fix is attached(which could show where the problem is): https://gist.github.com/laruence/153a3ad7ea739507c025 ------------------------------------------------------------------------ [2015-04-30 12:08:49] laruence@php.net instead of fix optimization in cfg .. maybe we should insert some ZEND_FREE, considering following test script, the FETCH_OBJ_R should not be optimized away: <?php class A { public function __get($name) { echo "__get: $name"; return "$name"; } } $a = new A; if ($a->true && false) { echo "bad"; } thanks ------------------------------------------------------------------------ [2015-04-30 03:01:59] laruence@php.net side affects by block pass optimization.. ------------------------------------------------------------------------ [2015-04-30 02:05:26] naoki-kawamukai at cybozu dot co dot jp Description: ------------ This leaks occurs on PHP 5.5(Git-2015-04-30), PHP 5.6(Git-2015-04-30). But it does not occur on PHP 7.0(Git-2015-04-30) My opcache configuration: vagrant@php7dev:~$ php -i | grep opcache opcache.blacklist_filename => no value => no value opcache.consistency_checks => 0 => 0 opcache.dups_fix => Off => Off opcache.enable => On => On opcache.enable_cli => Off => Off opcache.enable_file_override => Off => Off opcache.error_log => no value => no value opcache.fast_shutdown => 1 => 1 opcache.file_update_protection => 2 => 2 opcache.force_restart_timeout => 180 => 180 opcache.inherited_hack => On => On opcache.interned_strings_buffer => 8 => 8 opcache.load_comments => 1 => 1 opcache.log_verbosity_level => 1 => 1 opcache.max_accelerated_files => 10000 => 10000 opcache.max_file_size => 0 => 0 opcache.max_wasted_percentage => 5 => 5 opcache.memory_consumption => 256 => 256 opcache.optimization_level => 0xFFFFFFFF => 0xFFFFFFFF opcache.preferred_memory_model => no value => no value opcache.protect_memory => 0 => 0 opcache.restrict_api => no value => no value opcache.revalidate_freq => 2 => 2 opcache.revalidate_path => Off => Off opcache.save_comments => 1 => 1 opcache.use_cwd => On => On opcache.validate_timestamps => On => On Test script: --------------- <?php $a = array(true); if($a[0] && false) { echo 'test'; } ?> Expected result: ---------------- Nothing happen. Actual result: -------------- Memory leaks. vagrant@php7dev:~$ php -d opcache.enable_cli=1 -d opcache.optimization_level=0xFFFFFFFF leak.php [Thu Apr 30 01:42:30 2015] Script: '/home/vagrant/leak.php' /home/vagrant/php-src/Zend/zend_vm_execute.h(6257) : Freeing 0x7F6A57B167E0 (32 bytes), script=/home/vagrant/leak.php === Total 1 memory leaks detected === When disabling opcache optimization, memory does not leak. vagrant@php7dev:~$ php -d opcache.enable_cli=1 -d opcache.optimization_level=0 leak.php ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=69549&edit=1