hg: jdk/jdk: 8229027: Improve how JNIHandleBlock::oops_do distinguishes oops from non-oops

[erik.osterlund at oracle.com]

Changeset: 9dc92e89243a
Author:    eosterlund
Date:      2019-08-09 10:06 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/9dc92e89243a

8229027: Improve how JNIHandleBlock::oops_do distinguishes oops from non-oops
Reviewed-by: pliden, stuefe, dlong

! src/hotspot/share/runtime/jniHandles.cpp
! src/hotspot/share/runtime/jniHandles.hpp