[aarch64-port-dev ] git: openjdk/aarch64-port: master: 8264123: add ThreadsList.is_valid() support

[Daniel D.Daugherty]

Changeset: 9b2232bc
Author:    Daniel D. Daugherty <dcubed at openjdk.org>
Date:      2021-04-03 19:03:04 +0000
URL:       https://git.openjdk.java.net/aarch64-port/commit/9b2232bc

8264123: add ThreadsList.is_valid() support

Reviewed-by: dholmes, eosterlund, rehn

! src/hotspot/share/runtime/thread.hpp
! src/hotspot/share/runtime/thread.inline.hpp
! src/hotspot/share/runtime/threadSMR.cpp
! src/hotspot/share/runtime/threadSMR.hpp