RFR: 6983726: Reimplement MethodHandleProxies.asInterfaceInstance [v23]

[Chen Liang]

> As John Rose has pointed out in this issue, the current j.l.r.Proxy based implementation of MethodHandleProxies.asInterface has a few issues:
> 1. Exposes too much information via Proxy supertype (and WrapperInstance interface)
> 2. Does not allow future expansion to support SAM[^1] abstract classes
> 3. Slow (in fact, very slow)
> 
> This patch addresses all 3 problems:
> 1. It updates the WrapperInstance methods to take an `Empty` to avoid method clashes
> 2. This patch obtains already generated classes from a ClassValue by the requested interface type; the ClassValue can later be updated to compute implementation generation for abstract classes as well.
> 3. This patch's faster than old implementation in general.
> 
> Benchmark for revision 17:
> 
> Benchmark                                                          Mode  Cnt      Score       Error  Units
> MethodHandleProxiesAsIFInstance.baselineAllocCompute               avgt   15      1.503 ±     0.021  ns/op
> MethodHandleProxiesAsIFInstance.baselineCompute                    avgt   15      0.269 ±     0.005  ns/op
> MethodHandleProxiesAsIFInstance.testCall                           avgt   15      1.806 ±     0.018  ns/op
> MethodHandleProxiesAsIFInstance.testCreate                         avgt   15     17.332 ±     0.210  ns/op
> MethodHandleProxiesAsIFInstance.testCreateCall                     avgt   15     19.296 ±     1.371  ns/op
> MethodHandleProxiesAsIFInstanceCall.callDoable                     avgt    5      0.419 ±     0.004  ns/op
> MethodHandleProxiesAsIFInstanceCall.callHandle                     avgt    5      0.421 ±     0.004  ns/op
> MethodHandleProxiesAsIFInstanceCall.callInterfaceInstance          avgt    5      1.731 ±     0.018  ns/op
> MethodHandleProxiesAsIFInstanceCall.callLambda                     avgt    5      0.418 ±     0.003  ns/op
> MethodHandleProxiesAsIFInstanceCall.constantDoable                 avgt    5      0.263 ±     0.003  ns/op
> MethodHandleProxiesAsIFInstanceCall.constantHandle                 avgt    5      0.262 ±     0.002  ns/op
> MethodHandleProxiesAsIFInstanceCall.constantInterfaceInstance      avgt    5      0.262 ±     0.002  ns/op
> MethodHandleProxiesAsIFInstanceCall.constantLambda                 avgt    5      0.267 ±     0.019  ns/op
> MethodHandleProxiesAsIFInstanceCall.direct                         avgt    5      0.266 ±     0.013  ns/op
> MethodHandleProxiesAsIFInstanceCreate.createCallInterfaceInstance  avgt    5     18.057 ±     0.182  ns/op
> MethodHandleProxiesAsIFInstanceCreate.createCallL...

Chen Liang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 50 commits:

 - Clean up impl comment, reorganize tests; weak ref broken
 - Merge branch 'master' into explore/mhp-iface
 - Fix broken null behaviors
 - Merge branch 'master' into explore/mhp-iface
 - Merge branch 'mh-proxies' of https://github.com/mlchung/jdk into explore/mhp-iface
 - store a WeakReference holder in the class value
 - Merge branch 'master' into explore/mhp-iface
 - stage
   
   Signed-off-by: liach <liach at users.noreply.github.com>
 - Review comments
 - Code cleanup, thanks mandy!
 - ... and 40 more: https://git.openjdk.org/jdk/compare/4b1403d0...3d67ed06

-------------

Changes: https://git.openjdk.org/jdk/pull/13197/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13197&range=22
  Stats: 1749 lines in 16 files changed: 1349 ins; 311 del; 89 mod
  Patch: https://git.openjdk.org/jdk/pull/13197.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13197/head:pull/13197

PR: https://git.openjdk.org/jdk/pull/13197