From:             valyala at tut dot by
Operating system: any
PHP version:      Irrelevant
PHP Bug Type:     Zend Engine 2 problem
Bug description:  PHP does not free memory, occupied by cross-referencing 
objects

Description:
------------
See reproducible code below


Reproduce code:
---------------
<?

/**
    cross-referencing memory leak.
    PHP garbage collector doesn't free memory for 
    cross-referencing objects. It could be great
    problem for daemons or services, written on PHP
*/
function memleak($size)
{
    $a = str_repeat('a', $size);
    // construct child
    $child = array(
        'data' => $a,
    );
    // construct parent
    $parent = array(
        'data' => $a,
        'child' => &$child,
    );
    // comment following line to prevent memleak
    $child['parent'] = &$parent;
}

// try to leak of 1GB memory
for ($i = 0; $i < 1000; $i++) memleak(1000000);

sleep(10);

?>

Expected result:
----------------
normal execution of script

Actual result:
--------------
PHP occupies all available memory.

-- 
Edit bug report at http://bugs.php.net/?id=32403&edit=1
-- 
Try a CVS snapshot (php4):   http://bugs.php.net/fix.php?id=32403&r=trysnapshot4
Try a CVS snapshot (php5.0): 
http://bugs.php.net/fix.php?id=32403&r=trysnapshot50
Try a CVS snapshot (php5.1): 
http://bugs.php.net/fix.php?id=32403&r=trysnapshot51
Fixed in CVS:                http://bugs.php.net/fix.php?id=32403&r=fixedcvs
Fixed in release:            http://bugs.php.net/fix.php?id=32403&r=alreadyfixed
Need backtrace:              http://bugs.php.net/fix.php?id=32403&r=needtrace
Need Reproduce Script:       http://bugs.php.net/fix.php?id=32403&r=needscript
Try newer version:           http://bugs.php.net/fix.php?id=32403&r=oldversion
Not developer issue:         http://bugs.php.net/fix.php?id=32403&r=support
Expected behavior:           http://bugs.php.net/fix.php?id=32403&r=notwrong
Not enough info:             
http://bugs.php.net/fix.php?id=32403&r=notenoughinfo
Submitted twice:             
http://bugs.php.net/fix.php?id=32403&r=submittedtwice
register_globals:            http://bugs.php.net/fix.php?id=32403&r=globals
PHP 3 support discontinued:  http://bugs.php.net/fix.php?id=32403&r=php3
Daylight Savings:            http://bugs.php.net/fix.php?id=32403&r=dst
IIS Stability:               http://bugs.php.net/fix.php?id=32403&r=isapi
Install GNU Sed:             http://bugs.php.net/fix.php?id=32403&r=gnused
Floating point limitations:  http://bugs.php.net/fix.php?id=32403&r=float
No Zend Extensions:          http://bugs.php.net/fix.php?id=32403&r=nozend
MySQL Configuration Error:   http://bugs.php.net/fix.php?id=32403&r=mysqlcfg

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