[jdk8u-dev] RFR 8187629: NMT: Memory miscounting in compiler (C2)

[Zhengyu Gu]

Please review this 8u backport. The only conflict is copyright year in 
resourceArea.hpp, after fixing file paths.


Bug: https://bugs.openjdk.java.net/browse/JDK-8187629

Original changeset: http://hg.openjdk.java.net/jdk10/master/rev/5390057a4489

Webrev: http://cr.openjdk.java.net/~zgu/8187629/webrev.8u/

Thanks,

-Zhengyu