ID: 32981
User updated by: phpbug at swift-web dot com
Reported By: phpbug at swift-web dot com
Status: Open
Bug Type: Reproducible crash
Operating System: Gentoo 2.6.11
PHP Version: 5.0.5-dev
New Comment:
The script I run that crashes is a class I called ss_debug and it has a
dump method that will use the Reflection methods to output into a easy
to read table information about a class.
I remembered the ss_debug class has methods with static values so I set
it to report/parse itself and it ran, but only if I did it at the end of
a script that ran normally (If I tried dumping the output at the
beginning of a script or just an empty script like entered as an
example earlier, it crashed).
This confused me why it ran at the end and not at the beginning. I
tried adding a new method to this class that simple was:
function jason() {
static $me = true;
}
now it crashed all the time (whether I ran it on it's own or after a
page that normally worked).
Pulled a few hairs out and then it dawned on me to override the default
setting in that class before I dumped it and now it works.
So what I have narrowed it down to consistently is if I have static
variables that are still in their default setting of boolean true or
false then it causes a seg fault. If I override the default setting
before dumping (running the reflection class/methods) then it works.
Did I explain this clear enough?
Previous Comments:
------------------------------------------------------------------------
[2005-05-10 04:01:09] phpbug at swift-web dot com
Couldn't get a core file (even though compiled with --enable-debug) so
I ran httpd -X under gdb
cut 'n paste bt results here:
#0 0xb7cca595 in memcpy () from /lib/libc.so.6
#1 0xb7a90f71 in zif_vprintf () from
/usr/lib/apache2/modules/libphp5.so
#2 0x0822ee7b in ?? ()
#3 0x00000000 in ?? ()
#4 0x00000005 in ?? ()
#5 0xb7b2411e in zend_make_printable_zval () from
/usr/lib/apache2/modules/libphp5.so
#6 0xbffed060 in ?? ()
#7 0xb7b99b20 in php_tiff_bytes_per_format () from
/usr/lib/apache2/modules/libphp5.so
#8 0x00000103 in ?? ()
#9 0xb7b0ea04 in _emalloc () from /usr/lib/apache2/modules/libphp5.so
#10 0xbffec64c in ?? ()
#11 0xbffec648 in ?? ()
#12 0x00000052 in ?? ()
#13 0xb7a903c0 in zif_vprintf () from
/usr/lib/apache2/modules/libphp5.so
#14 0xbffec644 in ?? ()
#15 0xbffec648 in ?? ()
#16 0xbffec64c in ?? ()
#17 0x00000000 in ?? ()
#18 0x00000000 in ?? ()
#19 0x00000000 in ?? ()
#20 0x00000020 in ?? ()
#21 0x00000001 in ?? ()
#22 0x00000004 in ?? ()
#23 0x00000000 in ?? ()
#24 0x00000000 in ?? ()
#25 0x00000000 in ?? ()
#26 0x00000000 in ?? ()
#27 0x00000000 in ?? ()
#28 0x00000000 in ?? ()
#29 0x00000000 in ?? ()
#30 0x00000000 in ?? ()
#31 0x00000000 in ?? ()
#32 0x20000000 in ?? ()
#33 0x081e9cbc in ?? ()
#34 0x00000000 in ?? ()
#35 0x00000007 in ?? ()
#36 0x00000000 in ?? ()
#37 0x00000000 in ?? ()
#38 0x00000001 in ?? ()
#39 0x00000007 in ?? ()
#40 0x00000000 in ?? ()
#41 0x08220dc4 in ?? ()
#42 0x08220324 in ?? ()
#43 0x0822ed04 in ?? ()
#44 0x00000177 in ?? ()
#45 0x000001e0 in ?? ()
#46 0x00000001 in ?? ()
#47 0x00000000 in ?? ()
(line 47 repeats the same until 450)
#451 0xbffecca8 in ?? ()
#452 0x081f2d64 in ?? ()
#453 0x00000000 in ?? ()
(line 453 repeats the same until 596)
#597 0x73000000 in ?? ()
#598 0xb7d572a0 in ?? () from /lib/libc.so.6
#599 0x00000000 in ?? ()
#600 0x00000000 in ?? ()
#601 0x00000000 in ?? ()
#602 0x00000000 in ?? ()
#603 0x00000000 in ?? ()
#604 0x081ff8cc in ?? ()
#605 0x00000000 in ?? ()
#606 0x00000005 in ?? ()
#607 0x19999999 in ?? ()
#608 0x00000000 in ?? ()
#609 0xb7d6eff4 in ?? () from /lib/libc.so.6
#610 0x081ff8cc in ?? ()
#611 0x00000006 in ?? ()
#612 0xbffecf48 in ?? ()
#613 0xb7c8fefa in __strtol_internal () from /lib/libc.so.6
#614 0x00000004 in ?? ()
------------------------------------------------------------------------
[2005-05-10 00:52:01] [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
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.
I can't reproduce it - neither with 5_0-dev nor 5.1-dev
------------------------------------------------------------------------
[2005-05-09 22:19:07] phpbug at swift-web dot com
Tried with the latest stable 5.0 (from the link you sent) and the page
still crashes with seg fault error.
The version reported in phpinfo is 5.0.5-dev from that install.
------------------------------------------------------------------------
[2005-05-09 11:36:40] [EMAIL PROTECTED]
Please try using this CVS snapshot:
http://snaps.php.net/php5-STABLE-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php5.0-win32-latest.zip
Seems to work fine fore me with latest CVS HEAD (5.1-dev) but do try
and see if it's fixed in the 5.0 too.
------------------------------------------------------------------------
[2005-05-09 10:15:43] phpbug at swift-web dot com
Description:
------------
Discovered if I am using ReflectionMethod::getStaticVariables() on a
method that has a static variable that is set to boolean true or false
then php crashes (Apache 2 exists with following error)
[notice] child pid 28346 exit signal Segmentation fault (11)
I tried with php version 5.0.3 initially but upgraded to 5.0.4 and
problem still exists.
Reproduce code:
---------------
class demo_class {
static function myDemo($toggle) {
static $enabled = true;
// do whatever
}
}
$class = new ReflectionClass('demo_class');
foreach ($class->getMethods() as $method) {
$arr_static_vars[] = $method->getStaticVariables();
}
echo "done";
// (normally would output $arr_static_var but just put above
// line for simplicity in this example)
Expected result:
----------------
See a screen with just the word 'done' on it
Actual result:
--------------
Page loading stops immediately (and keeps last page shown displayed.
Apache logs show:
[notice] child pid 28346 exit signal Segmentation fault (11)
(pid of course varies)
If I change the third line in my sample code to:
static $enabled = 1;
(or string) the page does not crash and things display properly
I haven't tested this to see if it also crashes showing static
variables for the entire class (as opposed to the one in the method)
but if they inherit the same code I guess it would also crash but again
I haven't confirmed that.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=32981&edit=1
