src/jdk.compiler/share/classes/com/sun/tools/javac/util/JDK9Wrappers.java

*** 250,255 ****
--- 250,291 ----
                      throw new Abort(ex);
                  }
              }
          }
      }
+ 
+ 
+     /**
+      * Helper class for new method in jdk.internal.misc.VM.
+      */
+     public static final class VMHelper {
+         public static final String VM_CLASSNAME = "jdk.internal.misc.VM";
+ 
+         @SuppressWarnings("unchecked")
+         public static String[] getRuntimeArguments() {
+             try {
+                 init();
+                 Object result = getRuntimeArgumentsMethod.invoke(null);
+                 return (String[])result;
+             } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException
+                     | SecurityException ex) {
+                 throw new Abort(ex);
+             }
+         }
+ 
+         // -----------------------------------------------------------------------------------------
+ 
+         private static Class<?> vmClass = null;
+         private static Method getRuntimeArgumentsMethod = null;
+ 
+         private static void init() {
+             if (vmClass == null) {
+                 try {
+                     vmClass = Class.forName(VM_CLASSNAME, false, null);
+                     getRuntimeArgumentsMethod = vmClass.getDeclaredMethod("getRuntimeArguments");
+                 } catch (ClassNotFoundException | NoSuchMethodException | SecurityException ex) {
+                     throw new Abort(ex);
+                 }
+             }
+         }
+     }
  }