#26475 [Opn->Bgs]: Memory leaking with sockets

From: Date: Mon, 01 Dec 2003 07:13:05 +0000
Subject: #26475 [Opn->Bgs]: Memory leaking with sockets
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-51420@lists.php.net to get a copy of this message 
 ID:               26475
 Updated by:       sniper@php.net
 Reported By:      ipa at beta dot lt
-Status:           Open
+Status:           Bogus
 Bug Type:         Sockets related
 Operating System: Linux/FreeBSD
 PHP Version:      4.3.4
 New Comment:

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php

This is by design. Memory used by resources is freed in the request
shutdown.



Previous Comments:
------------------------------------------------------------------------

[2003-11-30 15:56:55] ipa at beta dot lt

Description:
------------
Sockets' socket_read() left 8 bytes in memory.

Example configure:
'./configure' '--enable-versioning' '--enable-memory-limit'
'--with-layout=GNU' '--with-zlib-dir=/usr' '--disable-all'
'--with-regex=php' '--disable-cli' '--enable-ctype'
'--with-dom=/usr/local' '--with-gd' '--enable-gd-native-ttf'
'--enable-gd-jis-conv' '--with-freetype-dir=/usr/local'
'--with-jpeg-dir=/usr/local' '--with-png-dir=/usr/local'
'--with-xpm-dir=/usr/local' '--with-mysql=/usr/local'
'--enable-overload' '--with-pcre-regex=yes' '--enable-posix'
'--enable-session' '--enable-sockets' '--enable-tokenizer'
'--with-expat-dir=/usr/local' '--enable-xml' '--with-zlib=yes'
'--with-apxs2=/usr/local/sbin/apxs' '--with-imap=/usr/local'
'--with-imap-ssl=/usr/local' '--prefix=/usr/local'
'i386-portbld-freebsd4.8'

but reproducable on linux too.



Reproduce code:
---------------
function foo(){
	$socket = socket_create (AF_INET, SOCK_STREAM, 0); 
	$result = socket_connect ($socket, gethostbyname ('www.example.com'),
80); 
	$in = "HEAD / HTTP/1.0\r\n\r\n";
	
	socket_write ($socket, $in, strlen ($in)); 
	while ($out = socket_read ($socket, 2048)) { /* .. */ }
	
	socket_close ($socket);
}

foo();
echo memory_get_usage() . "<br>";
foo();
echo memory_get_usage() . "<br>";
foo();
echo memory_get_usage() . "<br>";


Expected result:
----------------
xxxxx bytes.
xxxxx bytes.
xxxxx bytes.

Actual result:
--------------
xxxxx bytes.
xxxxx + 8 bytes.
xxxxx + 16 bytes.
...
xxxxx + (n * 8) bytes.


------------------------------------------------------------------------


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