ID: 10384
User Update by: [EMAIL PROTECTED]
Old-Status: Open
Status: Closed
Bug Type: Sockets related
Operating system: FreeBSD 4.2
PHP Version: 4.0.4pl1
Description: read() buffer memory not freed
This problem appears to be FreeBSD specific. Still exists with FreeBSD 4.3 but is
non-existent on Slackware.
Interesting side note: I had modified the code below and introduced a bug which
caused Slackware to send a 0 length message. That is this line:
write($msgsock,$send,strlen($send));
was changed to:
write($msgsock,$msgToSend,strlen($send));
and should have been:
write($msgsock,$msgToSend,strlen($msgToSend));
The variable $send was no longer defined resulting in the correct behavior under
Slackware of sending no message, however under FreeBSD the full message was sent.
Since this appears to be a bug in the libraries under FreeBSD and NOT PHP related I'm
closing the ticket.
Previous Comments:
---------------------------------------------------------------------------
[2001-05-03 13:33:45] [EMAIL PROTECTED]
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.
---------------------------------------------------------------------------
[2001-04-18 15:27:25] [EMAIL PROTECTED]
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.
---------------------------------------------------------------------------
Full Bug description available at: http://bugs.php.net/?id=10384
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