Bug#567992: OpenJDK7 on Debian GNU/kFreeBSD

[Damien Raude-Morvan]

Hi Andrew,

Thanks for your feedback.

Le mardi 28 juin 2011 02:11:12, Andrew John Hughes a écrit :
> On Thu, Jun 23, 2011 at 11:27:44PM +0200, Damien Raude-Morvan wrote:
> > Hi,
> > 
> > I'm currently trying to port OpenJDK7 (ie. icedtea)
> 
> These aren't the same thing.  IcedTea wraps and expands OpenJDK7.

Yes, I know that's not the same thing, sorry for abusing of "id est" 
abbreviation. BTW, since I've CC people not used to "openjdk" ecosystem, I 
prefer to talk about openjdk than icedtea, is this a problem ?

> > My current WiP patch [2] consist mostly in :
> >  - Alter build system to consider GNU/kFreeBSD like mostly linux (ie. add
> >  many ifdef __GLIBC__)
> > 
> >  - Steal BSD network stack impl for bsd-port hg repository
> >  - Use sysctl call instead of sysinfo()
> >  - Disable build of alsa and sctp
> 
> I'd be very surprised if you don't need more of the bsd work than just the
> network stack.  What exactly have you ported across?

Right now, main backports from bsd-port branch are :
- jdk/src/solaris/native/java/net/NetworkInterface.c (small changes in structs 
from kernel)
- jdk/src/solaris/native/sun/nio/ch/FileChannelImpl.c (sendfile from kfreebsd)
- hotspot/src/os/linux/vm/attachListener_linux.cpp (LOCAL_PEERCRED instead of 
SO_PEERCRED)

> > I'm able to compile a stage1 jdk (openjdk-boot) but first invocation of
> > this
> 
> > jdk (with ZeroVM of course) just fail badly :
> Why ZeroVM?  You mention above that the port is to x86 and x86_64, both of
> which have full HotSpot ports with a JIT.

Because I thought (naively ?) that since Zero doesn't use any 
assembly/linux/gcc specific hacks it should be easier to port to GNU/kFreeBSD 
as a first step.

> > I've attached hs_err_pid96754.log and put a GDB output online [3]
> > 
> > => Did someone have a clue about this issue ? Or maybe a process to track
> > down this segv signal ?
> > 
> > PS: Please keep debian-bsd at l.d.o and 567992 at b.d.o in CC.
> 
> No but given OpenJDK7 doesn't support *BSD, I'm not too surprised this
> doesn't work, especially when you're also throwing zero into the mix.  Why
> not just build with the bsd-port?  There's an option to do that, though
> it's not really maintained as I don't know of anyone running IcedTea on
> *BSD.

Could you explain a little bit more why do you think zerovm can add 
complexity/errors to my porting work ? You think that it would be simplier to 
work on porting to Hotspot ?

Right now, building bsd-port give a lot more errors since :
- it expect a *BSD userland (whereas GNU/kFreeBSD has **GNU tools**)
- it expect a *BSD libc (various diff from **GNU glibc**)
- large part of source code is a copy/paste from linux directories (lots of 
duplicated code) so patches from icedtea are not applied...

But maybe you're right, I'll try the other way around : I'll try to adapt bsd-
port to GNU/kFreeBSD.

Cheers,
-- 
Damien
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