PHP 4.0 Bug #10384 Updated: read() buffer memory not freed
| From: | rod at 23net dot net | Date: | Thu, 03 May 2001 17:33:46 +0000 |
| Subject: | PHP 4.0 Bug #10384 Updated: read() buffer memory not freed | ||
| Groups: | php.dev | ||
| Request: | Send a blank email to php-dev+get-53667@lists.php.net to get a copy of this message | ||
ID: 10384
User Update by: rod@23net.net
Status: Open
Bug Type: Sockets related
Description: read() buffer memory not freed
Problem still exists in 4.0.5
The script originally uses ~2MB resident. After connections are accepted it begins using memory in
chunks specified in the read() function until it reaches ~6-6.5MB (varies with each run), at which
time it continues to run without allocating more memory.
Previous Comments:
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[2001-04-18 15:27:25] rod@23net.net
Using the following code:
<?
/* Allow the script to hang around waiting for connections. */
set_time_limit (0);
##### Connect to DB
mysql_connect('localhost','chatscript','jen481');
##### Open log file
$fp=fopen('chat_log','a');
$outMsgHeader="HTTP/1.1 200 OKrnDate: ";
$outMsgAfterDate=" GMTrnServer: PHPrnConnection: closernTransfer-Encoding:
chunkedrnContent-Type: text/htmlrnrn";
$outMsgFooter="rnrn";
$sock=open_listen_sock(1089);
if ($sock<0)
{
echo "socket() failed: reason: " . strerror ($sock) . "n";
exit;
}
if (($ret = listen ($sock, 5)) < 0)
{
echo "listen() failed: reason: " . strerror ($ret) . "n";
shutdown($sock,2);
exit;
}
do
{
if (($msgsock = accept_connect($sock)) < 0)
{
echo "accept_connect() failed: reason: " . strerror ($msgsock) . "n";
shutdown($sock,2);
exit;
}
$ret=read($msgsock,$buf,2048);
$isPost=strpos($buf,'POST');
if ($isPost===false)
{
$isGet=strpos($buf,'GET');
if ($isGET===false)
{
write($msgsock,' HTTP/1.1 405rn',13);
}
else
{
$startQS=strpos($buf,'?')+1;
$endQS=strpos($buf,' ',$startQS);
$lenQS=$endQS-$startQS;
$QS=substr($buf,$startQS,$lenQS);
}
}
else
{
do
{
$ret=read($msgsock,$buf,2048);
if (substr($buf,0,15)=="Content-length:")
{
$conLen=substr($buf,16);
}
} while ($buf != "n");
// through with headers, now get actual content
$ret=read($msgsock,$buf,$conLen);
// $buf now contains the query string
$QS=$buf;
}
$msgToSend=urlencode(procMsg($QS));
$msgLen=dechex(strlen($msgToSend));
$sendDate=gmdate('D, d M Y H:i:s');
$send=$outMsgHeader.$sendDate.$msgLen."rn".$msgToSend.$outMsgFooter;
write($msgsock,$send,strlen($send));
$log=$sendDate."t".$QS."t".$msgToSend."n";
fwrite($fp,$log);
close ($msgsock);
} while (true);
?>
(The function procMsg() is not relevent as for bug testing is set to return 'test')
Running this script causes memory to be consumed and not released with each connection. I've
narrowed the problem down to the read() function as I can affect the rate of memory consumption by
modifying the length argument. Evidently the buffer is not freed.
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Full Bug description available at: http://bugs.php.net/?id=10384