[8u] RFA 8187629: NMT: Memory miscounting in compiler (C2)

[Zhengyu Gu]

I would like to request a backport of this bug:

Bug: https://bugs.openjdk.java.net/browse/JDK-8187629
Changeset: http://hg.openjdk.java.net/jdk10/master/rev/5390057a4489
Original code review: 
http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-September/028343.html

Backport code review: 
http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-November/029339.html

Thanks,

-Zhengyu