#50264 [Bgs]: Possible pcre memory leak
| From: | laszlo dot janszky at gmail dot com | Date: | Sat, 28 Nov 2009 16:52:56 +0000 |
| Subject: | #50264 [Bgs]: Possible pcre memory leak | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-145164@lists.php.net to get a copy of this message | ||
ID: 50264
User updated by: laszlo dot janszky at gmail dot com
Reported By: laszlo dot janszky at gmail dot com
Status: Bogus
Bug Type: PCRE related
Operating System: Windows XP
PHP Version: 5.3.1
New Comment:
Ok.
For last, here is my backtrace memory tester. If it's not a bug, then
bye bye.
<?php
header('content-type: text/html; charset=utf-8');
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
ini_set('pcre.recursion_limit', 10000);
$kb=1024;
$Mb=1024*1024;
$max_memory_size=50*$Mb;
$pattern=
'%
{(\w+)(?:}
(.*?(?:(?0).*?)*?)
{/\1)?}
%usDx';
if (isset($_POST['test']) && $_POST['test']!='')
{
ini_set('pcre.backtrack_limit', $max_memory_size);
if (preg_match_all($pattern,$_POST['test'],$m,PREG_SET_ORDER))
{
$a=1;
$b=$max_memory_size;
while (abs($a-$b)>1)
{
$c=(int)(($a+$b)/2);
ini_set('pcre.backtrack_limit', $c);
if
(preg_match_all($pattern,$_POST['test'],$m,PREG_SET_ORDER))
{
$b=$c;
}
else
{
$a=$c;
}
}
}
?><div style="float: left; margin: 10px; "><?php
if (isset($c))
{
?>A fogyasztott memória:<br /><?php echo ($c/$kb); ?>.kb.<br
/><?php
}
else
{
?>A memória fogyasztás túllépte az engedélyezett kvótát,
vagy a minta nem illeszkedik.<br /><?php
}
?><br /><br />A tesztelt szöveg: <br /><pre><?php echo
$_POST['test']; ?></pre><?php
?></div><?php
}
?>
<div style="float: left; margin: 10px;">
<form action="<?php echo $_SERVER['PHP_SELF']; ?>"
method="post"
enctype="application/x-www-urlencoded; charset=utf-8">
<input type="submit" value="test1" style="vertical-align: top"
/>
<textarea id="test1" name="test" rows="18">
1.){display}
2.){display}
3.){display}
4.){display}
5.){display}
6.){display}
7.){display}
8.){display}
9.){display}
</textarea>
</form>
</div>
<div style="float: left; margin: 10px;">
<form action="<?php echo $_SERVER['PHP_SELF']; ?>"
method="post"
enctype="application/x-www-urlencoded; charset=utf-8">
<input type="submit" value="test2" style="vertical-align: top"
/>
<textarea id="test2" name="test" rows="18">
1.){display}
2.){display}
3.){display}
4.){display}
5.){display}
6.){display}
7.){display}
8.){display}
9.){display}
{/display}
{/display}
{/display}
{/display}
{/display}
{/display}
{/display}
{/display}
{/display}
</textarea>
</form>
</div>
Previous Comments:
------------------------------------------------------------------------
[2009-11-28 02:40:16] laszlo dot janszky at gmail dot com
"Did you test it with the command line pcre test tool?"
I did not test it.
------------------------------------------------------------------------
[2009-11-28 02:37:58] laszlo dot janszky at gmail dot com
Ahm, so you mean, this is a pcre memory handling problem, not a php
bug? Okay, then where can I report this issue?
(Sorry for the bad English, I'm just med- ...)
------------------------------------------------------------------------
[2009-11-27 23:26:10] rasmus@php.net
Did you test it with the command line pcre test tool? This is unlikely
to have anything to do with php-specific code.
------------------------------------------------------------------------
[2009-11-27 23:07:01] laszlo dot janszky at gmail dot com
OK.
If it's not a bug, then what is it?
------------------------------------------------------------------------
[2009-11-27 17:57:16] jani@php.net
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
------------------------------------------------------------------------
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the rest of the comments, please view the bug report online at
http://bugs.php.net/50264
--
Edit this bug report at http://bugs.php.net/?id=50264&edit=1