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From "Weldon Washburn" <weldon...@gmail.com>
Subject Re: [DRLVM] (JIRA 1580) write barrier implementation for JET
Date Tue, 26 Sep 2006 16:51:21 GMT
It would probably be best if a JIT person committed this patch.  Maybe
Stephan Mishura?

If its not committed soon, bug me and I will do it.


On 9/26/06, Xiao-Feng Li <xiaofeng.li@gmail.com> wrote:
>
> Hi, the patch attached in JIRA 1580 (submitted by YuNan) is a write
> barrier implementation for JET that GCv5 is going to use (it doesn't
> impact anything else). It would be great if some commiter can help to
> review and commit it. Thanks. -xiaofeng
>
> http://issues.apache.org/jira/browse/HARMONY-1580?page=all
>
> The patch is against revision revision 442796.
>
> Repeat the desciption of the patch:
> "Attached patch is an implementation of write barrier for JET compiler
> of DRLVM. The patch lets JET to call "gc_requires_barriers()" of GC to
> determine if it needs to insert the write barrier code into the jitted
> code, so it doesn't impact current DRLVM/GC at all. It calls
> gc_heap_slot_write_ref( ) of GC module, which takes three parameters.
> The signature is "void gc_heap_slot_write_ref (Managed_Object_Handle
> p_obj_holding_ref,Managed_Object_Handle *p_slot, Managed_Object_Handle
> p_target)".
>
> The patch is based on revision 442796. We hope it can be committed to
> Harmony soon because GCv5 will be depending on it. We don't use
> existing getaddress__gc_write_barrier_fastcall () in DRLVM because it
> only remembers object rather than the slot, and the name is not
> descriptive. But we may use it later. Thanks."
>
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-- 
Weldon Washburn
Intel Middleware Products Division

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