src/hotspot/share/runtime/handshake.cpp

rev 52283 : [mq]: 8212933
rev 52284 : 8212933: Thread-SMR: requesting a VM operation whilst holding a ThreadsListHandle can cause deadlocks
Reviewed-by: eosterlund, dcubed, sspitsyn

@@ -355,10 +355,12 @@
   return false;
 }
 
 void HandshakeState::process_by_vmthread(JavaThread* target) {
   assert(Thread::current()->is_VM_thread(), "should call from vm thread");
+  // Threads_lock must be held here, but that is assert()ed in
+  // possibly_vmthread_can_process_handshake().
 
   if (!has_operation()) {
     // JT has already cleared its handshake
     return;
   }