[jdk11u-dev] RFR: 8221351: Crash in KlassFactory::check_shared_class_file_load_hook [v2]

[Joshua Cao]

> This fixes a crash in JDK 11.
> 
> Merge conflicts are mostly trivial. We can keep hunks from both HEAD and the backport. There is one merge conflict in licensing.

Joshua Cao has updated the pull request incrementally with one additional commit since the last revision:

  Update HelloCustom copyright year

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Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/1604/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/1604/files/6b7ae232..666c4eca

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1604&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1604&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1604.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1604/head:pull/1604

PR: https://git.openjdk.org/jdk11u-dev/pull/1604