RFR: 8058176: [mlvm] tests should not allow code cache exhaustion

[Evgeny Nikitin]

On Thu, 11 Feb 2021 13:27:52 GMT, Evgeny Nikitin <enikitin at openjdk.org> wrote:

> Another approach to the JDK-8058176 and #2440 - never allowing the tests hit CodeCache limits. The most significant consumer is the MH graph builder (the MHTransformationGen), whose consumption is now controlled. List of changes:
> 
> * Code cache size getters are added to WhiteBox;
> * MH sequences are now built with remaining Code cache size in mind (always let 2M clearance);
> * Dependencies on WhiteBox added for all affected tests;
> * The test cases in question un-problemlisted.
> 
> Testing: the whole vmTestbase/vm/mlvm/ in win-lin-mac x86.

As suggested by @iignatev, cleaned off WhiteBox changes in favour of management JMX beans, resulting in much cleaner solution.

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PR: https://git.openjdk.java.net/jdk/pull/2523