Experimental patches for unsafe cleanup <was> Re: The s.m.Unsafe representation in hotspot and method registration
staffan.larsen at oracle.com
Tue Mar 25 13:37:55 UTC 2014
(Adding hotspot-runtime-dev since some changes are in hotspot code).
On 25 mar 2014, at 14:20, Paul Sandoz <paul.sandoz at oracle.com> wrote:
> On Mar 25, 2014, at 9:34 AM, Paul Sandoz <Paul.Sandoz at oracle.com> wrote:
>> On Mar 24, 2014, at 7:49 PM, Staffan Larsen <staffan.larsen at oracle.com> wrote:
>>> We have abandoned the HSX model. From JDK 8 one version of Hotspot will be tied to one version of the JDK. This looks like old code that has not been cleaned up.
>> Thanks, yes, looks like we can clean this up and also remove the deprecated methods at the same time.
> Here are some preliminary webrevs to clean up unsafe and also remove all old, deprecated and monitor-related methods:
> Passes all tests i have thrown at it locally.
> There is some additional clean up that could be done to remove prefetch read/write intrinsics hooked up to older versions of Unsafe:
> do_intrinsic(_prefetchRead, sun_misc_Unsafe, prefetchRead_name, prefetch_signature, F_RN) \
> do_name( prefetchRead_name, "prefetchRead") \
> do_intrinsic(_prefetchWrite, sun_misc_Unsafe, prefetchWrite_name, prefetch_signature, F_RN) \
> do_name( prefetchWrite_name, "prefetchWrite") \
> do_intrinsic(_prefetchReadStatic, sun_misc_Unsafe, prefetchReadStatic_name, prefetch_signature, F_SN) \
> do_name( prefetchReadStatic_name, "prefetchReadStatic") \
> do_intrinsic(_prefetchWriteStatic, sun_misc_Unsafe, prefetchWriteStatic_name, prefetch_signature, F_SN) \
> do_name( prefetchWriteStatic_name, "prefetchWriteStatic") \
> That will also require updates in various other files. I presume these prefetch methods are never used throughout the runtime?
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