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From Stas Bekman <s...@stason.org>
Subject Re: segfault on global disable of mod_perl
Date Wed, 07 Jul 2004 19:04:00 GMT
Stas Bekman wrote:
> Phil Pennock wrote:
> 
>> -------------8<---------- Start Bug Report ------------8<----------
>> 1. Problem Description:
>>
>> If "PerlOptions -Enable" is set in global context in Apache config,
>> mod_perl segfaults.
>>
>> I was experimenting, because of the support for cloned Perl instances
>> for differing vhosts, to see if the Perl handling could be enabled in 
>> only
>> the vhosts which explicitly required it, by disabling in global context
>> and explicit enabling.  Apparently not.  An error message and "don't be
>> stupid, and here's why it's stupid" is perhaps preferable to a 
>> segfault of
>> Apache.
>>
>> Config to replicate, using Apache2 setup:
>>
>>  LoadModule perl_module libexec/apache2/mod_perl.so
>>  <IfModule mod_perl.c>
>>    PerlModule Apache2
>>    PerlOptions -Enable
>>  </IfModule>
>>
>> This using the relevant ports installed under FreeBSD, with whatever
>> test framework that invokes.  Removing "PerlOptions -Enable" avoids
>> the problem.
> 
> 
> Thank you, Phil, for the proper bug report. It was easy to reproduce the 
> problem.
> 
> For now, I think to just add an assert when one tries to do that on the 
> top level. This is because we do many things on the top level. It's 
> possible that will be able to still disable mod_perl for the top-level, 
> but may try to look at that later.

Actually it was pretty easy to add a real fix, if you try the current 
cvs you should be able to say:

PerlOptions -Enable
Listen 0.0.0.0:8533
<VirtualHost _default_:8533>
     PerlOptions +Enable
     <Location /foo>
         SetHandler modperl
         PerlResponseHandler foo
     </Location>
</VirtualHost>

none of the handlers will be executed at the top level, but perl will be 
available. Of course I did very basic testing, so it's possible that you 
will spot some other issues with it. Let us know whether the current cvs 
works for you.

-- 
__________________________________________________________________
Stas Bekman            JAm_pH ------> Just Another mod_perl Hacker
http://stason.org/     mod_perl Guide ---> http://perl.apache.org
mailto:stas@stason.org http://use.perl.org http://apacheweek.com
http://modperlbook.org http://apache.org   http://ticketmaster.com

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