src/hotspot/share/runtime/thread.inline.hpp

@@ -123,10 +123,12 @@
   return _thread_state;
 #endif
 }
 
 inline void JavaThread::set_thread_state(JavaThreadState s) {
+  assert(current_or_null() == NULL || current_or_null() == this,
+         "state change should only be called by the current thread");
 #if defined(PPC64) || defined (AARCH64)
   // Use membars when accessing volatile _thread_state. See
   // Threads::create_vm() for size checks.
   OrderAccess::release_store((volatile jint*)&_thread_state, (jint)s);
 #else