#43199 [Com]: Many segmentation faults

 ID:               43199
 Comment by:       jfrisby at adknowledge dot com
 Reported By:      eugene dot pikalov at gmail dot com
 Status:           No Feedback
 Bug Type:         PDO related
 Operating System: Linux  Fedora  2.6.22.5-76.fc7
 PHP Version:      5.2.4
 New Comment:

Follow-up: Changing the DSN in the sample code to "sqlite::memory:" per

Johannes' suggestion -- and removing the actual query since the table 
doesn't exist -- produces the same behavior.

We will attempt to test 5.2.6, and if it occurs there, 5.3.0.


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

[2008-08-15 21:17:24] jfrisby at adknowledge dot com

We're seeing an almost identical stack trace from a php commandline 
program.  Basically, if we connect to a DB using PDO_mysql, we get an 
exit code of 1 after all our code has successfully executed without 
error -- but only if we use persistent connections.

This is on PHP 5.2.4 under Ubuntu Hardy.

Per suggestions on #php.pecl, will try SQLite driver, and if possible,

5.3.

---snip---

<?php
error_reporting(E_ALL|E_STRICT);
 
 
try {
$obj = new PDO("mysql:host=localhost;dbname=ls_dev_jfrisby","root",""
   ,array(PDO::ATTR_PERSISTENT => true));
$stmt = $obj->prepare("select count(1) cnt from channel_map_bids");
$stmt->execute();
var_dump($stmt->fetchAll());
 
$obj = null;
} catch (Exception $e) {
   print "exception: " . (string)$e . "\n";
}
 
exit(0);
 
?>

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

[2007-11-13 01:00:01] php-bugs at lists dot php dot net

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".

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

[2007-11-09 08:38:05] serban dot ghita at verasys dot com

i can confirm this on slackware after upgrading.
Linux www 2.6.21.5-smp #1 SMP Sat Nov 3 15:51:44 Local time zone must
be set--see zic m i686 Intel(R) Xeon(R) CPU E5335  @ 2.00GHz
GenuineIntel GNU/Linux

i was running httpd-2.2.6 with PHP 5.2.4

i tried compiling both apache and php with less options, nothing
worked.

temporary workaround: installed httpd-2.0.58 + PHP 5.2.4 and everithing
worked. i cannot generate a backtrace at the moment because i'm on a
production server

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

[2007-11-05 23:46:17] [email protected]

Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32

Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.



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

[2007-11-05 14:17:41] eugene dot pikalov at gmail dot com

Description:
------------
On 5.2.3 everything allright, after update i have many segfaults in
httpd logs. Apache/2.2.4

Reproduce code:
---------------
[Fri Nov 02 17:30:01 2007] [notice] child pid 30265 exit signal
Segmentation fault (11)
[Fri Nov 02 17:32:21 2007] [notice] child pid 30840 exit signal
Segmentation fault (11)
[Fri Nov 02 17:35:17 2007] [notice] child pid 31093 exit signal
Segmentation fault (11)
[Fri Nov 02 17:39:06 2007] [notice] child pid 551 exit signal
Segmentation fault (11)
[Fri Nov 02 17:39:58 2007] [notice] child pid 419 exit signal
Segmentation fault (11)
[Fri Nov 02 17:43:56 2007] [notice] child pid 2439 exit signal
Segmentation fault (11)
*** glibc detected *** /usr/sbin/httpd: munmap_chunk(): invalid
pointer: 0x80e90b60 ***
======= Backtrace: =========
/lib/libc.so.6(cfree+0x1bb)[0x42255b]
/etc/httpd/modules/libphp5.so(zend_hash_destroy+0x4e)[0xcc607e]
/etc/httpd/modules/libphp5.so[0xb42227]
/etc/httpd/modules/libphp5.so(php_pdo_pdbh_dtor+0x15)[0xb422e5]
/etc/httpd/modules/libphp5.so(plist_entry_destructor+0x82)[0xcc8822]
/etc/httpd/modules/libphp5.so[0xcc5d68]
/etc/httpd/modules/libphp5.so(zend_hash_graceful_reverse_destroy+0x18)[0xcc5fa8]
/etc/httpd/modules/libphp5.so(zend_shutdown+0x12)[0xcbc892]
/etc/httpd/modules/libphp5.so(php_module_shutdown+0x2f)[0xc7ba6f]
/etc/httpd/modules/libphp5.so(php_module_shutdown_wrapper+0xb)[0xc7bb1b]
/etc/httpd/modules/libphp5.so[0xd344e3]
/usr/lib/libapr-1.so.0[0x385d1d]
/usr/lib/libapr-1.so.0(apr_pool_destroy+0x3d)[0x38648d]
/usr/sbin/httpd[0x800386c5]
/usr/sbin/httpd[0x80038c30]
/usr/sbin/httpd[0x80038e41]
/usr/sbin/httpd(ap_mpm_run+0x913)[0x80039843]
/usr/sbin/httpd(main+0x8b7)[0x80010217]
/lib/libc.so.6(__libc_start_main+0xe0)[0x3ccf70]
/usr/sbin/httpd[0x8000f2f1]
======= Memory map: ========
[Fri Nov 02 17:46:00 2007] [notice] child pid 2773 exit signal Aborted
(6)
[Fri Nov 02 17:50:37 2007] [notice] child pid 4359 exit signal
Segmentation fault (11)
[Fri Nov 02 17:53:55 2007] [notice] child pid 5519 exit signal
Segmentation fault (11)
[Fri Nov 02 17:54:38 2007] [notice] child pid 5622 exit signal
Segmentation fault (11)
[Fri Nov 02 17:55:51 2007] [notice] child pid 4738 exit signal
Segmentation fault (11)
[Fri Nov 02 17:57:45 2007] [notice] child pid 6674 exit signal
Segmentation fault (11)




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


-- 
Edit this bug report at http://bugs.php.net/?id=43199&edit=1