php5 segfault

[Jeremy Chadwick]

On Wed, Oct 08, 2008 at 02:51:00PM +0200, Laszlo Nagy wrote:
> uname -a:
>
> FreeBSD shopzeus.com 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #3: Mon Oct   
> 6 07:50:31 EDT 2008      
> gandalf at shopzeus.chello.hu:/usr/obj/usr/src/sys/SHOPZEUS  amd64
>
> when compiling /usr/ports/php5 I see messages like:
>
> bin/sh /usr/ports/lang/php5/work/php-5.2.6/libtool --silent  
> --preserve-dup-deps --mode=compile cc  -IZend/  
> -I/usr/ports/lang/php5/work/php-5.2.6/Zend/ -DPHP_ATOM_INC  
> -I/usr/ports/lang/php5/work/php-5.2.6/include  
> -I/usr/ports/lang/php5/work/php-5.2.6/main  
> -I/usr/ports/lang/php5/work/php-5.2.6 -I/usr/local/include/libxml2  
> -I/usr/local/include -I/usr/ports/lang/php5/work/php-5.2.6/ext/date/lib  
> -I/usr/ports/lang/php5/work/php-5.2.6/TSRM  
> -I/usr/ports/lang/php5/work/php-5.2.6/Zend    -O2 -fno-strict-aliasing  
> -pipe   -c /usr/ports/lang/php5/work/php-5.2.6/Zend/zend_API.c -o  
> Zend/zend_API.lo
>
> So it is using -O2 and -pipe. Is this something that I can disable?

If you want.  "make config" in /usr/ports/lang/php5 will give you a
menu option for DEBUG; turn it on.

I'm not sure what the compile options you're showing have *anything* to
do with the segfault you're reporting.  I don't see any backtraces or
details of the segfault.

> It might be because we are using postgresql connections. For pages without  
> pgsql connection, there is no segfault.

I've personally used PHP5 (as a CGI only, not as an Apache module)
with PostgreSQL and experienced no segfaults.

> It must be noted that the segfault happens on cleanup. E.g. all web  
> sites are working fine, except that we are getting many many segfault  
> messages in the logs all the time.

Many people have found that re-ordering the "extensions" lines in
/usr/local/etc/php/extensions.ini has solved odd segfaults.  I
personally have never seen this, nor have ever needed to adjust that
file, but it has worked for others.

Also, you cannot use a threaded Apache (e.g. threaded MPMs) with PHP
since not all extensions support threading.  Your Apache needs to be
built without threads and use a non-thread model (e.g. prefork).  I've
also had success with Apache-ITK-mpm.

Search the mailing lists for this situation, try the recommendations,
and then if nothing fixes it, provide a backtrace.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |