Heap inspection not working for OpenJDK 8 + Shenandoah

[Roman Leventov]

Hi Shenandoah developers,

Is that expected that heap inspection (jmap -histo:live, inspectheap
operation) doesn't work when I use Shenandoah backport for OpenJDK 8? The
command returns immediately with response code 0, not dumping any heap
stats. When I use a different GC algorithm with the same OpenJDK build, the
heap stats are produced normally.