RFR: 8166790: Add stress test GCBasher

[Erik Joelsson]

JPRT changes look good to me.

/Erik

On 2016-09-28 17:01, Erik Helin wrote:
> Hi all,
>
> this patch adds a new GC stress test called GCBasher. GCBasher builds up
> large (well, for some definiton of large) object graphs by figuring out
> the relations between classes in the JDK. The test usually stresses the
> GC quite a lot, especially when run with a smaller heap.
>
> The changes in the top-level repository are for JPRT. JPRT will now run
> the jtreg test GCBasher instead of the old version.
>
> Enhancement:
> https://bugs.openjdk.java.net/browse/JDK-8166790
>
> Webrev:
> - hotspot: http://cr.openjdk.java.net/~ehelin/8166790/hotspot/00/
> - top: http://cr.openjdk.java.net/~ehelin/8166790/top/00/
>
> Testing:
> - Running the new jtreg test locally on Linux x86-64:
>    $ jtreg -jdk:build/fastdebug/jdk hotspot/test/gc/stress/TestGCBasher.java
>
>    (can also be run via: $ make test TEST=hotspot_fast_gc_gcbasher)
> - JPRT
>
> Thanks,
> Erik