Leaking references
| From: | Wez Furlong | Date: | Wed, 28 Mar 2001 13:06:36 +0000 |
| Subject: | Leaking references | ||
| References: | 1 | Groups: | php.dev |
| Request: | Send a blank email to php-dev+get-50121@lists.php.net to get a copy of this message | ||
[I can't reach the PHP web site (100% packet loss), so I can't open a bug
report at this time]
I have found a leak in the Zend engine:
class A
{
var $t = null;
function &run(&$t)
{
$this->t = &$t;
return $this->t->run();
}
}
class C {
var $obj = null;
function &load_and_run()
{
$this->obj = & new A;
return $this->obj->run($this);
}
function &run()
{
return "";
}
}
function &load_it()
{
$t =& new C;
echo $t->load_and_run();
}
echo load_it();
Running this script yields:
zend_hash.c(291) : Freeing 0x0818E474 (37 bytes), script=leak.php
Last leak repeated 1 time
zend_hash.c(202) : Freeing 0x08193D1C (20 bytes), script=leak.php
Last leak repeated 1 time
./zend_execute.c(1848) : Freeing 0x0818E414 (48 bytes), script=leak.php
zend_API.c(208) : Actual location (location was relayed)
Last leak repeated 1 time
./zend_execute.c(1847) : Freeing 0x08193F3C (12 bytes), script=leak.php
Last leak repeated 1 time
I know the script looks odd - it's part of a complex script that dynamically
includes scripts to load classes.
You get more leaks if you add more member variables to class A.
I would guess that something (possibly the instance of class A) is not being
freed/released somewhere that it should.
--Wez.
PS: If one of you guys could put this in the bug DB under my name, I would
appreciate it.