RFR: 8286681: ShenandoahControlThread::request_gc misses the case of GCCause::_codecache_GC_threshold [v2]

[Jie Fu]

> Hi all,
> 
> Some tests fail with Shenandoah GC after JDK-8282191.
> The reason is that the assert in `ShenandoahControlThread::request_gc` misses the case of `GCCause::_codecache_GC_threshold`.
> It would be better to fix it.
> 
> Thanks.
> Best regards,
> Jie

Jie Fu has updated the pull request incrementally with one additional commit since the last revision:

  Revert the test change

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8691/files
  - new: https://git.openjdk.java.net/jdk/pull/8691/files/8f094d32..dc96246c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8691&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8691&range=00-01

  Stats: 15 lines in 1 file changed: 0 ins; 15 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8691.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8691/head:pull/8691

PR: https://git.openjdk.java.net/jdk/pull/8691