RFR: 8317318: Serial: Change GenCollectedHeap to SerialHeap in whitebox [v2]

Sat Sep 30 17:27:42 UTC 2023

> Use more precise type for Serial GC. I also added a ` ShouldNotReachHere()` there, because using serial-heap when serial-gc is not used seems problematic.

Albert Mingkun Yang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  s1-prims

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Changes: https://git.openjdk.org/jdk/pull/15988/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15988&range=01
  Stats: 11 lines in 1 file changed: 8 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15988.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15988/head:pull/15988

PR: https://git.openjdk.org/jdk/pull/15988