[8u-dev] RFA: JDK-8187577: JVM crash during gc doing concurrent marking

[Poonam Parhar]

Requesting approval of backport of the following fix to 8u-dev:

Bug: JDK-8187577: <https://bugs.openjdk.java.net/browse/JDK-8187577> JVM 
crash during gc doing concurrent marking
Webrev: http://cr.openjdk.java.net/~poonam/8187577/webrev.01/
Codereview: 
http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2018-February/021131.html
Changeset: http://hg.openjdk.java.net/jdk/hs/rev/6b510cb0f14f

The change applies cleanly to 8u.

Thanks,
Poonam