RFR: Rich assertion failure logging

[Roman Kennke]

Am 13.02.2018 um 12:32 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/rich-asserts/webrev.01/
>
> This reworks all the assorted in-line ASSERT blocks we have around Shenandoah code into the single
> facility that prints everything it knows about the oop, fwdptr, regions, matrix, etc. The triggered
> assert would print the rich message, like current Verifier does.
>
> Testing: hotspot_gc_shenandoah {fastdebug|release}, injecting failures
>
> Thanks,
> -Aleksey
>

This is nice. Go!

Roman