[8u-dev] 8141420: Compiler runtime entries don't hold Klass* from being GCed

[Vladimir Ivanov]

Hello,

Please, approve a backport of the fix to jdk8u-dev.

https://bugs.openjdk.java.net/browse/JDK-8141420
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/3497071a8c93
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2016-March/021891.html

The patch applies cleanly (except jvmciRuntime.cpp which is present only 
in 9).

Thanks!

Best regards,
Vladimir Ivanov