6472925: OutOfMemoryError fails to generate stack trace as it now ought

Summary: Print an additional message for OOM during stack trace printing
Reviewed-by: dholmes, phh, acorn, kamg, dcubed

src/share/vm/runtime/thread.cpp

@@ -1611,7 +1611,15 @@ void JavaThread::exit(bool destroy_vm, ExitType exit_type) {
                                   uncaught_exception,  // Arg 2
                                   THREAD);
         }
-        CLEAR_PENDING_EXCEPTION;
+        if (HAS_PENDING_EXCEPTION) {
+          ResourceMark rm(this);
+          jio_fprintf(defaultStream::error_stream(),
+                "\nException: %s thrown from the UncaughtExceptionHandler"
+                " in thread \"%s\"\n",
+                Klass::cast(pending_exception()->klass())->external_name(),
+                get_thread_name());
+          CLEAR_PENDING_EXCEPTION;
+        }
       }
     }