diff -r 2c33418a6d57 -r 83b611b88ac8 jdk/src/java.base/share/classes/jdk/internal/misc/JavaLangAccess.java
--- a/jdk/src/java.base/share/classes/jdk/internal/misc/JavaLangAccess.java	Thu Apr 06 17:01:03 2017 +0000
+++ b/jdk/src/java.base/share/classes/jdk/internal/misc/JavaLangAccess.java	Fri Apr 07 08:05:54 2017 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,10 +27,10 @@
 
 import java.io.IOException;
 import java.lang.annotation.Annotation;
+import java.lang.module.ModuleDescriptor;
 import java.lang.reflect.Executable;
-import java.lang.reflect.Layer;
 import java.lang.reflect.Method;
-import java.lang.reflect.Module;
+import java.net.URI;
 import java.net.URL;
 import java.security.AccessControlContext;
 import java.security.ProtectionDomain;
@@ -38,6 +38,7 @@
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Stream;
 
+import jdk.internal.module.ServicesCatalog;
 import jdk.internal.reflect.ConstantPool;
 import sun.reflect.annotation.AnnotationType;
 import sun.nio.ch.Interruptible;
@@ -140,11 +141,6 @@
     void invokeFinalize(Object o) throws Throwable;
 
     /**
-     * Returns the boot Layer
-     */
-    Layer getBootLayer();
-
-    /**
      * Returns the ConcurrentHashMap used as a storage for ClassLoaderValue(s)
      * associated with the given class loader, creating it if it doesn't already exist.
      */
@@ -185,4 +181,74 @@
      * Invalidate package access cache
      */
     void invalidatePackageAccessCache();
+
+    /**
+     * Defines a new module to the Java virtual machine. The module
+     * is defined to the given class loader.
+     *
+     * The URI is for information purposes only, it can be {@code null}.
+     */
+    Module defineModule(ClassLoader loader, ModuleDescriptor descriptor, URI uri);
+
+    /**
+     * Defines the unnamed module for the given class loader.
+     */
+    Module defineUnnamedModule(ClassLoader loader);
+
+    /**
+     * Updates the readability so that module m1 reads m2. The new read edge
+     * does not result in a strong reference to m2 (m2 can be GC'ed).
+     *
+     * This method is the same as m1.addReads(m2) but without a permission check.
+     */
+    void addReads(Module m1, Module m2);
+
+    /**
+     * Updates module m to read all unnamed modules.
+     */
+    void addReadsAllUnnamed(Module m);
+
+    /**
+     * Updates module m1 to export a package to module m2. The export does
+     * not result in a strong reference to m2 (m2 can be GC'ed).
+     */
+    void addExports(Module m1, String pkg, Module m2);
+
+    /**
+     * Updates a module m to export a package to all unnamed modules.
+     */
+    void addExportsToAllUnnamed(Module m, String pkg);
+
+    /**
+     * Updates module m1 to open a package to module m2. Opening the
+     * package does not result in a strong reference to m2 (m2 can be GC'ed).
+     */
+    void addOpens(Module m1, String pkg, Module m2);
+
+    /**
+     * Updates a module m to open a package to all unnamed modules.
+     */
+    void addOpensToAllUnnamed(Module m, String pkg);
+
+    /**
+     * Updates a module m to use a service.
+     */
+    void addUses(Module m, Class<?> service);
+
+    /**
+     * Returns the ServicesCatalog for the given Layer.
+     */
+    ServicesCatalog getServicesCatalog(ModuleLayer layer);
+
+    /**
+     * Returns an ordered stream of layers. The first element is is the
+     * given layer, the remaining elements are its parents, in DFS order.
+     */
+    Stream<ModuleLayer> layers(ModuleLayer layer);
+
+    /**
+     * Returns a stream of the layers that have modules defined to the
+     * given class loader.
+     */
+    Stream<ModuleLayer> layers(ClassLoader loader);
 }