test/testlibrary/whitebox/sun/hotspot/WhiteBox.java

*** 203,208 ****
--- 203,211 ----
                         .map(f -> f.apply(name))
                         .filter(x -> x != null)
                         .findAny()
                         .orElse(null);
    }
+   
+   //Safepoint Checking
+   public native void assertMatchingSafepointCalls(boolean mutexSafepointValue, boolean attemptedNoSafepointValue);
  }