git: openjdk/jdk: 8252627: Make it safe for JFR thread to read threadObj

[Erik Österlund]

Changeset: e0d5b5f7
Author:    Erik Österlund <eosterlund at openjdk.org>
Date:      2020-09-07 14:33:10 +0000
URL:       https://git.openjdk.java.net/jdk/commit/e0d5b5f7

8252627: Make it safe for JFR thread to read threadObj

Reviewed-by: dholmes, mgronlun

! src/hotspot/share/gc/z/zObjectAllocator.cpp
! src/hotspot/share/jfr/periodic/sampling/jfrThreadSampler.cpp