In progress: Run the tiers 1-6 to make sure there are no regression.Runtime/vthread/TestObjectAllocationSampleEvent.java The originally failed tests are expected to pass now:.New test: serviceability/jvmti/vthread/ToggleNotifyJvmtiTest.New regression test: serviceability/jvmti/vthread/ToggleNotifyJvmtiTest.New WhiteBox function WB_SetVirtualThreadsNotifyJvmtiMode(JNIEnv* env, jobject wb, jboolean enable) needed for testing of this update.New function JvmtiEnvBase::disable_virtual_threads_notify_jvmti() which is needed for testing.This function executes a VM operation counting VTMS transition bits in all JavaThread's to correctly set the static counter _VTMS_transition_count needed for VTMS transition protocol. New function JvmtiEnvBase::enable_virtual_threads_notify_jvmti() which does enabling JVMTI VTMS transition notifications in case of agent loaded into running VM.The fix is to enable virtual threads support for late binding JVMTI agents.
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