RFR: 8277503: compiler/onSpinWait/TestOnSpinWaitAArch64DefaultFlags.java failed with "OnSpinWaitInst with the expected value 'isb' not found."

[Andrew Haley]

On Tue, 23 Nov 2021 14:23:20 GMT, Evgeny Astigeevich <duke at openjdk.java.net> wrote:

> OnSpinWaitInst/OnSpinWaitInstCount are diagnostic options.
> 'XX:+PrintFlagsFinal' does not print diagnostic options in release builds which causes the test failure. 
> The fix is to use '-XX:+UnlockDiagnosticVMOptions'.
> 
> Testing: release and fastdebug builds
> - `make test TEST=hotspot/jtreg/compiler/onSpinWait/TestOnSpinWaitAArch64DefaultFlags.java`: Passed

Marked as reviewed by aph (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6521