git: openjdk/loom: fibers: add JVMTI Suspend/Resume support for virtual threads

[duke]

Changeset: 12ffa40f
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2020-08-04 07:50:59 +0000
URL:       https://git.openjdk.java.net/loom/commit/12ffa40f

add JVMTI Suspend/Resume support for virtual threads

! make/test/JtregNativeHotspot.gmk
! src/hotspot/share/prims/jvm.cpp
! src/hotspot/share/prims/jvmti.xml
! src/hotspot/share/prims/jvmtiEnv.cpp
! src/hotspot/share/prims/jvmtiEnvBase.cpp
! src/hotspot/share/prims/jvmtiEnvBase.hpp
! src/hotspot/share/prims/jvmtiExport.cpp
! src/hotspot/share/prims/jvmtiThreadState.cpp
! src/hotspot/share/prims/jvmtiThreadState.hpp
! src/hotspot/share/runtime/mutexLocker.cpp
! src/hotspot/share/runtime/mutexLocker.hpp
! test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadTest/libVThreadTest.c
! test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadUnsupportedTest/libVThreadUnsupportedTest.c
+ test/hotspot/jtreg/vmTestbase/nsk/jvmti/SuspendThread/suspendvthr001.java
+ test/hotspot/jtreg/vmTestbase/nsk/jvmti/SuspendThread/suspendvthr001/TestDescription.java
+ test/hotspot/jtreg/vmTestbase/nsk/jvmti/SuspendThread/suspendvthr001/libsuspendvthr001.cpp
+ test/hotspot/jtreg/vmTestbase/nsk/jvmti/SuspendThread/suspendvthr001/suspendvthr001.cpp