RFR: 8316657: Support whitebox testing in microbenchmarks

[Magnus Ihse Bursie]

On Wed, 6 Dec 2023 15:32:14 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> The need to use whitebox-testing (wb.jar) from JMH microbenchmarks has recently arisen.

Alternatively, I could also unpack wb.jar alongside `$(JMH_CORE_JAR) $(JMH_COMMONS_MATH_JAR) $(JMH_JOPT_SIMPLE_JAR)`, and re-pack it into `benchmarks.jar`. My gut feeling was that it "polluted" benchmarks.jar unnecessarily, but then again it also creates an additional jar dependency. If the "I just want a single jar with everything" is an important driver here, then that is perhaps the way to go?

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PR Comment: https://git.openjdk.org/jdk/pull/16996#issuecomment-1847467298