Integrated: 8262049: [TESTBUG] Fix TestReferenceRefersTo.java for Shenandoah IU mode

[Roman Kennke]

On Fri, 19 Feb 2021 19:48:51 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> Shenandoah's IU mode allows referents to be cleared even when accessed during concurrent marking. The test TestReferenceRefersTo.java needs to be adjusted to allow for that.
> 
> Test:
>  - [x] TestReferenceRefersTo.java + Shenandoah/IU
>  - [x] TestReferenceRefersTo.java + Shenandoah/SATB
>  - [x] TestReferenceRefersTo.java + G1

This pull request has now been integrated.

Changeset: c6eae061
Author:    Roman Kennke <rkennke at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/c6eae061
Stats:     139 lines in 2 files changed: 127 ins; 7 del; 5 mod

8262049: [TESTBUG] Fix TestReferenceRefersTo.java for Shenandoah IU mode

Reviewed-by: kbarrett, zgu

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PR: https://git.openjdk.java.net/jdk/pull/2653