RFR[XS]: 8220353: [TESTBUG] TestRegisterRestoring uses SafepointALot without UnlockDiagnosticVMOptions

[Severin Gehwolf]

Hi,

Currently one test in tier1 tests fails for me: TestRegisterRestoring.
It fails because its using -XX:+SafepointALot without
-XX:+UnlockDiagnosticVMOptions. I assume SafepointALot being diagnostic
might have been a recent change. Not sure. Anyway, here is a fix:

http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8220353/01/webrev/

Bug: https://bugs.openjdk.java.net/browse/JDK-8220353

Testing: Test fails prior this fix. Passes after.

I intend to push this change under the trivial rules, OK?

Thoughts?

Thanks,
Severin