ID: 36884
Comment by: ndickerson at gmi-mr dot com
Reported By: guenther dot unterrainer at gknsintermetals dot com
Status: No Feedback
Bug Type: Apache related
Operating System: SLES9 SP3 x86-64
PHP Version: 4.4.2
New Comment:
I have also encountered this bug on php 4.3.10 using php xmlrpc
libraries(phpxmlrpc.sourceforge.net) and processing an array of 20,000
records using the library, which happens to create a large number of
objects.
*** glibc detected *** double free or corruption (!prev): 0x0fbf24b8
***
is followed by some
*** glibc detected *** corrupted double-linked list: 0x006f4858 ***
There are also some other errors that I have lost that occur in the
place of the double free or corruption error..
This works fine when it is not processing as many objects.
Previous Comments:
------------------------------------------------------------------------
[2006-10-05 16:53:12] egon at inf dot ufpr dot br
The above code works fine in 5.1. It crashes on PHP 4.3.4, 4.4.2 and
4.4.4 on both linux/windows.
------------------------------------------------------------------------
[2006-10-04 22:35:04] egon at inf dot ufpr dot br
By the way, I've got several types of erros, it appears to be random:
[Wed Oct 04 17:51:18 2006] [notice] child pid 12451 exit signal
Segmentation fault (11)
*** glibc detected *** free(): invalid next size (fast): 0x08202798
***
[Wed Oct 04 17:58:35 2006] [notice] child pid 12693 exit signal Aborted
(6)
77*** glibc detected *** corrupted double-linked list: 0xb7b7d358 ***
[Wed Oct 04 19:21:51 2006] [notice] child pid 12731 exit signal Aborted
(6)
------------------------------------------------------------------------
[2006-10-04 22:31:30] egon at inf dot ufpr dot br
Man, this was very difficult to track down. I spent some hours locating
to problem and trying to isolate it. To me it has nothing to do with
databases or acceletators. Apparently it has to do with a lot of
classes in an array. I'm using
PHP 4.4.2-1build1 on Ubuntu 6.06.
You need to have some high limit on php.ini's memory_limit (to me 512M
was enough). The 'magical' number 16000 on the code above can be
lowered to 3000 to crash my 1GRam machine but I had to increase it to
16000 to crash my 2GRam server.
I have a production server down now because of this, any suggestions?
Downgrading perhaps?
We will be glad to cooperate with more info.
Thanks,
<?php
class Field {
var $name,$type,$value, $length, $allownull, $description,
$long_description, $validation, $accepted_values, $default_value;
function Field($name, $type, $length, $allownull, $description,
$default=NULL,$long_description=NULL) {
$this->name=$name;
$this->type=$type;
$this->length=$length;
$this->allownull=$allownull;
$this->description=$description;
$this->long_description=$long_description;
$this->default_value=$default;
$this->validation=NULL;
$this->accepted_values=NULL;
}
}
class DBObject {
function DBObject($conn=NULL) {
$this->setupFields();
$this->conn=$conn;
$this->orderby=array();
}
function addField($name, $type, $length, $allownull,
$description, $default=NULL,$long_description=NULL) {
$this->field[$name]["obj"]=new Field($name, $type,
$length, $allownull, $description, $default,$long_description);
}
}
class SomeTable extends DBObject {
function setupFields() {
for ($i=0;$i<26;$i++)
$this->addField("field$i", "string", 11, false,
"Some field");
}
}
function crashMe() {
$x=new SomeTable(NULL);
$arr=array();
for($i=0;$i<16000;$i++) {
$m=new SomeTable(NULL);
$arr[]=$m;
}
return $arr;
}
crashMe();
echo "I've not crashed?";
?>
------------------------------------------------------------------------
[2006-09-14 17:40:07] albertof at barrahome dot org
I got the same error:
*** glibc detected *** free(): invalid pointer: 0x09586360 ***
*** glibc detected *** free(): invalid pointer: 0x099f2360 ***
*** glibc detected *** free(): invalid pointer: 0x0a0f1360 ***
[EMAIL PROTECTED] [/usr/local/apache/conf]# php -v
PHP 4.4.4 (cli) (built: Sep 14 2006 14:21:20)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies
with Zend Extension Manager v1.0.10, Copyright (c) 2003-2006, by
Zend Technologies
with Zend Optimizer v3.0.0, Copyright (c) 1998-2006, by Zend
Technologies
*** glibc detected *** corrupted double-linked list: 0x09328b90 ***
Aborted (core dumped)
[EMAIL PROTECTED] [/usr/local/apache/conf]#
I solve disabling the Zend Optimizer module.
------------------------------------------------------------------------
[2006-03-28 12:28:25] [EMAIL PROTECTED]
We need a *SHORT* but *COMPLETE* reproduce code.
If you're unable to paste it here - please make as SHORT as you can and
put it somewhere in the net.
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/36884
--
Edit this bug report at http://bugs.php.net/?id=36884&edit=1
