[8u] RFR(S) 8059036: Implement Diagnostic Commands for heap and finalizerinfo

[David Buck]

Hi!

May I please get a review of the following very simple backport of this 
serviceability improvement to JDK 8?

The two hotspot jtreg test cases needed to be modified slightly because 
of the lack of dcmd-specific test support in JDK 8's HS code base. The 
only non-test difference from the JDK 9 changeset is modifying an 
include directive (objArrayOop.inline.hpp -> objArrayOop.hpp) to 
compensate for JDK-8072911.

bug report:
https://bugs.openjdk.java.net/browse/JDK-8059036

JDK 9 changesets:
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/56a527afc34a
http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/9b17d0a2720f

JDK 9 review thread:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-May/033169.html
http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-June/033835.html

JDK 8 backport webrevs for review:
http://cr.openjdk.java.net/~dbuck/8059036.0_jdk8/

Cheers,
-Buck

[0] https://bugs.openjdk.java.net/browse/JDK-8072911