[lworld] RFR: 8281116: [lworld] Adding Preload attribute support [v2]

[Frederic Parain]

> Please review this changeset adding support for the Preload attribute.
> It includes a logging feature to track and diagnose those optimistic class loading.
> 
> Tested with Mach5 tier1.
> 
> Thank you,
> 
> Fred

Frederic Parain has updated the pull request incrementally with one additional commit since the last revision:

  Fixes to address Harold's comments

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

Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/623/files
  - new: https://git.openjdk.java.net/valhalla/pull/623/files/cb0dd95a..a3ccb572

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=623&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=623&range=00-01

  Stats: 25 lines in 6 files changed: 7 ins; 11 del; 7 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/623.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/623/head:pull/623

PR: https://git.openjdk.java.net/valhalla/pull/623