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src/share/vm/classfile/javaClasses.cpp

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@@ -1045,11 +1045,12 @@
   }
 }
 
 // Read thread status value from threadStatus field in java.lang.Thread java class.
 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
-  assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
+  assert(Threads_lock->owned_by_self() || Thread::current()->is_Watcher_thread() ||
+         Thread::current()->is_VM_thread() ||
          JavaThread::current()->thread_state() == _thread_in_vm,
          "Java Thread is not running in vm");
   // The threadStatus is only present starting in 1.5
   if (_thread_status_offset > 0) {
     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
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