From:
Operating system: Windows Server 2008 R2 x64
PHP version: 5.3.3
Package: *General Issues
Bug Type: Bug
Bug description:GC does not collect before PHP issue "Allowed memory size
exhausted"
Description:
------------
GC does not collect cycles before PHP issue "Allowed memory size
exhausted",
therefore it is possible for a script to get this error even if GC is
enabled and
there is enough memory to reuse.
To get error the script just has to fill all the remaining memory after
last GC
and before next, fill no matter how: with garbage or normal info.
It is obvious for me, that calling GC before issuing error is a must have,
as a
last possibility to continue normal execution.
Test script:
---------------
<?php
set_time_limit(0);
error_reporting(PHP_INT_MAX);
ini_set("memory_limit", "2M");
echo memory_get_peak_usage(true), "\r\n";
$o1 = new StdClass();
$o2 = new StdClass();
$o1->v1 = $o2;
$o1->v2 = $o1;
$o1->v = str_repeat("a", 1024 * 1024);
unset($o1, $o2);
echo memory_get_peak_usage(true), "\r\n";
$o1 = new StdClass();
$o2 = new StdClass();
$o1->v1 = $o2;
$o1->v2 = $o1;
$o1->v = str_repeat("a", 1024 * 1024);
unset($o1, $o2);
echo memory_get_peak_usage(true), "\r\n";
Expected result:
----------------
I expect to see the same result as if I run
<?php
...
echo memory_get_peak_usage(true), "\r\n";
$o1 = new StdClass();
$o2 = new StdClass();
$o1->v1 = $o2;
$o1->v2 = $o1;
gc_collect_cycles();
$o1->v = str_repeat("a", 1024 * 1024);
unset($o1, $o2);
echo memory_get_peak_usage(true), "\r\n";
Actual result:
--------------
PHP Fatal error: Allowed memory size of * bytes exhausted (tried to
allocate *
bytes)
--
Edit bug report at http://bugs.php.net/bug.php?id=53031&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53031&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53031&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53031&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53031&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53031&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53031&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53031&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53031&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53031&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53031&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53031&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53031&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53031&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53031&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53031&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53031&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53031&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53031&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53031&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53031&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53031&r=mysqlcfg
