RFR: 8318586: Explicitly handle upcall stub allocation failure [v2]

[Jorn Vernee]

> Explicitly handle UpcallStub allocation failures by terminating. We currently might try to use the returned `nullptr` which would fail sooner or later. This patch just makes the termination explicit.

Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:

  call fatal without holding code cache lock

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/16311/files
  - new: https://git.openjdk.org/jdk/pull/16311/files/06a50e9e..3f2e9d88

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16311&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16311&range=00-01

  Stats: 7 lines in 1 file changed: 4 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16311.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16311/head:pull/16311

PR: https://git.openjdk.org/jdk/pull/16311