Bug #53454 [Csd->Bgs]: Memory leak when using non-static class member as static one or inversely
Edit report at http://bugs.php.net/bug.php?id=53454&edit=1
ID: 53454
Updated by: cataphract@php.net
Reported by: hritter at e-onsoftware dot com
Summary: Memory leak when using non-static class member as
static one or inversely
-Status: Closed
+Status: Bogus
Type: Bug
Package: Performance problem
Operating System: Linux gentoo
PHP Version: 5.2.14
Block user comment: N
Private report: N
Previous Comments:
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[2010-12-02 19:55:18] hritter at e-onsoftware dot com
I am really confused, the leak was due to the PHP debugger I
implemented. (No leak when test the bug without this debugger)
------------------------------------------------------------------------
[2010-12-02 19:36:50] hritter at e-onsoftware dot com
Description:
------------
I had some memory overflow errors. I logged the memory usage step by
step and then I see a difference of 50Mo between two logs.
In the method called between this two logs, I used a static class
attribute as a non-static one (with $this). The modification on the
attribute took effect but triggered an "Interoperability or
Compatibility Notice".
I fixed this error and I had a gain of 50 Mo!!
I have the same bug with a non-static method used as a static method
(with self::). I had a gain of 90Mo because this method was really far
away in the code.
It is a pretty harsh punishment for a compatibility error ;-)
Test script:
---------------
class LeakTester
{
private static $nTest = 0;
public function Test()
{
$this->nTest++;
echo $this->nTest."<br/>\n";
}
}
// ---> Test
$oTest = new LeakTester();
$oTest->Test();
echo memory_get_usage()."<br/>\n"; // (1)
$oTest->Test();
echo memory_get_usage()."<br/>\n"; // (2) > (1)
Expected result:
----------------
(2) should be equal to (1)
Actual result:
--------------
(2) is really greater than (1)
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=53454&edit=1
Thread (3 messages)