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From Stas Bekman <s...@stason.org>
Subject Re: [MP2] 1.999024 fails on OS X
Date Wed, 18 May 2005 06:14:07 GMT
Philippe M. Chiasson wrote:
> Stas Bekman wrote:
> 
>>Philippe M. Chiasson wrote:
>>[...]
>>
>>
>>>After a long promised investigation session, I believe I have pinned
>>>it down. It seems to have been introduced by change r160562 when the
>>>anon_cnt initialization code was moved around as a result. Didn't have
>>>enough time tonight to dig down as to _why_ this is breaking though...
>>>
>>>Not entirely sure why this breaks specifically on Darwin and all, but
>>>the following patch seems to make the problem dissapear. Does it fix
>>>the problem you are seeing too ?
>>>
>>>Index: src/modules/perl/modperl_handler.c
>>>===================================================================
>>>--- src/modules/perl/modperl_handler.c  (revision 170139)
>>>+++ src/modules/perl/modperl_handler.c  (working copy)
>>>@@ -89,9 +89,6 @@
>>>         modperl_modglobal_lookup(aTHX_ "ANONSUB");
>>>     MP_TRACE_h(MP_FUNC, "init $PL_modglobal{ANONSUB} = []");
>>>     MP_MODGLOBAL_STORE_HV(gkey);
>>>-
>>>-    /* init the counter to 0 */
>>>-    modperl_global_anon_cnt_init(p);
>>> }
>>>
>>> /* allocate and populate the anon handler sub-struct */
>>>Index: src/modules/perl/mod_perl.c
>>>===================================================================
>>>--- src/modules/perl/mod_perl.c (revision 170139)
>>>+++ src/modules/perl/mod_perl.c (working copy)
>>>@@ -532,6 +532,9 @@
>>>     modperl_global_init_server_rec(pconf, s);
>>>
>>>     modperl_tls_create_request_rec(pconf);
>>>+
>>>+    /* init the counter to 0 */
>>>+    modperl_global_anon_cnt_init(pconf);
>>> }
>>>
>>> /*
>>
>>Philippe is talking about
>>http://svn.apache.org/viewcvs.cgi?rev=160562&view=rev
>>
>>http://svn.apache.org/viewcvs.cgi/perl/modperl/trunk/src/modules/perl/mod_perl.c?rev=160562&view=diff&r1=160562&r2=160561&p1=perl/modperl/trunk/src/modules/perl/mod_perl.c&p2=/perl/modperl/trunk/src/modules/perl/mod_perl.c
>>
> 
> 
> Yup, that one.
> 
> 
>>But it can't be reverted , since it was a fix for a bug in
>>vhosts+anonsub+ithreads. I couldn't add a test reproducing the problem,
>>as it wasn't suitable for the test suite (would have affected other
>>tests). So it needs to stay that way and figured out what needs to be
>>fixed elsewhere.
>>
>>Philippe, your patch can't be applied either, since it has exactly the
>>same effect as reverting r160562, since you moved
>>modperl_global_anon_cnt_init() to modperl_init_globals() which is called
>>only for the top-level server:
> 
> 
> Yes, but I am not reverting that change, keeping it as is, hash initialization
> and all, and only moving the modperl_global_anon_cnt_init() up so it's called
> only once. I don't think initializating that anon_cnt global more than once is
> a feature (and it registers it's destruction twice, causing the segfault on OSX).

No, you are reverting it. Follow the calls trace, you've just moved the 
original case (before my change) to a different place.

> Are you saying that you need more than one distinct global anon_cnt in some
> vhost+anonsub+ithreads setup?

Yes. Otherwise an anon-sub registered at the server startup in a vhost 
+Parent doesn't work.

First it was moved from running from each vhost to just the base server:
http://marc.theaimsgroup.com/?l=apache-modperl-dev&m=110177550408046&w=2
The whole thread is here (i think it was OSX too):
http://marc.theaimsgroup.com/?l=apache-modperl-dev&m=110168848916838&w=2

but then Dominique Quatravaux has encountered another bug, which you can 
see in this thread:
http://marc.theaimsgroup.com/?t=111227919600001&r=1&w=2


-- 
__________________________________________________________________
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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