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[2005-05-09 10:15 UTC] 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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Last updated: Fri Oct 24 05:00:02 2025 UTC |
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?