php5 segfault
Jeremy Chadwick
koitsu at FreeBSD.org
Thu Oct 9 12:05:43 UTC 2008
On Thu, Oct 09, 2008 at 01:15:59PM +0200, Laszlo Nagy wrote:
>
>> I thought you said you changed the order and it didn't work? *confused*
>>
> I said no success so far. There are more than 20 modules and there is no
> description about what the good order should be. I had to keep trying...
>> If so: it should be obvious why it hasn't been fixed. It doesn't appear
>> to affect everyone -- for example, we have never seen this problem in
>> the 4-5 years we've been using PHP on FreeBSD -- and the solution
>> doesn't really make much sense anyway. It smells of a missing symbol
>> problem (e.g. libxx.so wants a symbol named "hello_bob", but the symbol
>> is available in libyy.so, which has to be loaded first; however, ld.so
>> and dlopen(3) have explicit handling for this scenario (see RTLD_NOW vs.
>> RTLD_LAZY), so I'm at a loss).
>>
> Maybe you are right. But I would think that a missing symbol problem
> should throw an error message telling "missing symbol" instead of making
> a segfault.
That all depends on the C code. If you'd like to dig around in it and
investigate/debug it to find out what the true nature of the problem is,
that would be beneficial, since AFAIK no one has done that yet. It's
all speculative.
>> That said, if you feel this is a humongous issue, I highly recommend you
>> mail the PHP port maintainer and express your concerns, or open a PR
>>
> We had the same problem on our previous server. I'm going to install
> another box today and test it. If the problem comes out again, I'm going
> to write a PR.
And I would also recommend filing a bug report with the PHP folks. This
may be something that's a PHP problem and not a FreeBSD problem. It may
"not be a Linux problem" because for all we know the Linux RPMs and
Portage stuff in CentOS/Gentoo could have workarounds in place.
--
| 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 |
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