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:



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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