Experimental patches for unsafe cleanup <was> Re: The s.m.Unsafe representation in hotspot and method registration
Paul Sandoz
paul.sandoz at oracle.com
Tue Mar 25 13:20:30 UTC 2014
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:
http://cr.openjdk.java.net/~psandoz/jdk9/jdk-unsafe-cleanup/webrev/jdk.patch
http://cr.openjdk.java.net/~psandoz/jdk9/hotspot-unsafe-cleanup/webrev/
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?
Paul.
More information about the core-libs-dev
mailing list