RFR: 8213269: convert test/hotspot/jtreg/runtime/memory/RunUnitTestsConcurrently to gtest

[Coleen Phillimore]

On Fri, 5 Feb 2021 20:35:23 GMT, Mikhailo Seledtsov <mseledtsov at openjdk.org> wrote:

> This is a preliminary review. I would like to get the initial feedback before I proceed with conversion of the remaining tests.
> 
> Here is what I did so far:
>   - created a UnitTestThread and a main test runner, based on gtests with similar needs
>   - moved the original code from HotSpot internals (so called hotspot internal tests: src/hotspot/share/memory/virtualspace.cpp)
>     to the newly created gtest while wrapping it into a TestReservedSpace class. I did not change the code of the test.
>   - removed invocations from whitebox.cpp
> 
> Testing:
>   - ran GTestWrapper on usual platforms - All PASS
>   - ensured that ReservedSpaceConcurrent is in the logs and passed
> 
> After gathering the feedback my plan is:
> Plan:
>   - move the remaining internal Memory/VirtualSpace tests into a gTest
>     - I am thinking about using separate files for each test
>   - create a common file for UnitTestThread and MultiThreadTestRunner to reuse the code

Looks good! Thank you for making this a gtest.

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Marked as reviewed by coleenp (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2436