[master] RFR: Lilliput om world [v5]

[Coleen Phillimore]

> Added a diagnostic option UseObjectMonitorTable to maintain performance of LM_LIGHTWEIGHT locking which is now defaulted to on in mainline.
> 
> Incorporated Axel's patch to support other platforms with UseObjectMonitorTable (branch to slow path).
> 
> Tested tier 1-4 on x86.  Fails both versions of this test, but not locally:  runtime/cds/TestDefaultArchiveLoading.java.
> 
> tier1 aarch64 in progress.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Allow for hardcoding UseCompactObjectHeaders to on.

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Changes:
  - all: https://git.openjdk.org/lilliput/pull/181/files
  - new: https://git.openjdk.org/lilliput/pull/181/files/43ef424c..4f90107d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=lilliput&pr=181&range=04
 - incr: https://webrevs.openjdk.org/?repo=lilliput&pr=181&range=03-04

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/lilliput/pull/181.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/181/head:pull/181

PR: https://git.openjdk.org/lilliput/pull/181