--- old/src/java.base/share/classes/jdk/internal/access/foreign/MemoryAddressProxy.java	2019-12-09 18:35:50.159185430 +0000
+++ new/src/java.base/share/classes/jdk/internal/access/foreign/MemoryAddressProxy.java	2019-12-09 18:35:49.711174564 +0000
@@ -31,6 +31,11 @@
  * an incubating module) to be accessed from the memory access var handles.
  */
 public interface MemoryAddressProxy {
+    /**
+     * Check that memory access is within spatial and temporal bounds.
+     * @throws IllegalStateException if underlying segment has been closed already.
+     * @throws IndexOutOfBoundsException if access is out-of-bounds.
+     */
     void checkAccess(long offset, long length, boolean readOnly);
     long unsafeGetOffset();
     Object unsafeGetBase();