On Tue, Nov 17, 2009 at 05:35:06AM -0800, Greg Lewis wrote: > On Mon, Nov 16, 2009 at 10:32:56PM -0800, Greg Lewis wrote: > > The bad news is that the patches don't quite work on amd64. Its easy > > enough to fix up the atomic ones for that, but I'm getting a little > > bogged down in > > > > hotspot/src/os_cpu/bsd_zero/vm/orderAccess_bsd_zero.inline.hpp > > > > It seems like the i386 doesn't use this, but on amd64 it wants to use > > the GCC builtin __sync_synchronize() as a full memory barrier. > > Unfortunately this isn't being resolved with the FreeBSD native version > > of gcc (maybe it was added later?) so that is blocking me. I don't want > > to have to define ASM versions of this since, to me at least, that > > partly defeats the purpose of Zero. Yes, I am aware that there are > > ASM versions for arm and powerpc already defined in the file... > > > > Anyway, I'm looking for alternatives before I breakdown and write > > any assembler. Any suggestions gratefully accepted. > > D'oh. I think real problem is that my amd64 box is still running FreeBSD 6.x, > which means its using gcc 3.4.6. I bet that __sync_synchronize() wasn't > implemented until gcc 4.x and if I just upgrade it will work. > > Of course that is a pain for anyone wanting to use a non-gcc compiler.
That was indeed the case. I upgraded to 8.0-RC3 and I can build Zero on amd64 just with a few changes to the atomic implementation. I'd like to try it out on an architecture we don't yet support though, so I'll see if I can get my sparc64 box running well enough to do that. -- Greg Lewis Email : gle...@eyesbeyond.com Eyes Beyond Web : http://www.eyesbeyond.com Information Technology FreeBSD : gle...@freebsd.org
