git: openjdk/loom: fibers: fixed deadlocks in JVMTI S/R support for cthreads and VTMT disabling mechanism

[duke]

Changeset: 1e52c8ed
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2020-10-13 05:13:42 +0000
URL:       https://git.openjdk.java.net/loom/commit/1e52c8ed

fixed deadlocks in JVMTI S/R support for cthreads and VTMT disabling mechanism

! src/hotspot/share/prims/jvmtiEnvBase.cpp
! src/hotspot/share/prims/jvmtiThreadState.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
! src/java.base/share/classes/java/lang/VirtualThread.java
! test/hotspot/jtreg/vmTestbase/nsk/jvmti/SuspendThread/suspendvthr001.java