test/lib/sun/hotspot/WhiteBox.java

@@ -375,10 +375,11 @@
   public native long allocateMetaspace(ClassLoader classLoader, long size);
   public native void freeMetaspace(ClassLoader classLoader, long addr, long size);
   public native long incMetaspaceCapacityUntilGC(long increment);
   public native long metaspaceCapacityUntilGC();
   public native boolean metaspaceShouldConcurrentCollect();
+  public native long metaspaceReserveAlignment();
 
   // Don't use these methods directly
   // Use sun.hotspot.gc.GC class instead.
   public native int currentGC();
   public native int allSupportedGC();