src/jdk.unsupported/share/classes/sun/misc/Unsafe.java

rev 58565 : 8238358: Implementation of JEP 371: Hidden Classes
Reviewed-by: duke
Contributed-by: mandy.chung@oracle.com, lois.foltan@oracle.com, david.holmes@oracle.com, harold.seigel@oracle.com, serguei.spitsyn@oracle.com, alex.buckley@oracle.com, jamsheed.c.m@oracle.com
rev 58567 : [mq]: rename-isHidden

@@ -28,10 +28,11 @@
 import jdk.internal.vm.annotation.ForceInline;
 import jdk.internal.misc.VM;
 import jdk.internal.reflect.CallerSensitive;
 import jdk.internal.reflect.Reflection;
 
+import java.lang.invoke.MethodHandles;
 import java.lang.reflect.Field;
 import java.util.Set;
 
 
 /**

@@ -634,10 +635,16 @@
      * must preserve all bits of static field offsets.
      * @see #getInt(Object, long)
      */
     @ForceInline
     public long objectFieldOffset(Field f) {
+        if (f == null) {
+            throw new NullPointerException();
+        }
+        if (f.getDeclaringClass().isHidden()) {
+            throw new UnsupportedOperationException("can't get field offset on a hidden class: " + f);
+        }
         return theInternalUnsafe.objectFieldOffset(f);
     }
 
     /**
      * Reports the location of a given static field, in conjunction with {@link

@@ -656,10 +663,16 @@
      * this method reports its result as a long value.
      * @see #getInt(Object, long)
      */
     @ForceInline
     public long staticFieldOffset(Field f) {
+        if (f == null) {
+            throw new NullPointerException();
+        }
+        if (f.getDeclaringClass().isHidden()) {
+            throw new UnsupportedOperationException("can't get field offset on a hidden class: " + f);
+        }
         return theInternalUnsafe.staticFieldOffset(f);
     }
 
     /**
      * Reports the location of a given static field, in conjunction with {@link

@@ -671,10 +684,16 @@
      * not be used in any way except as argument to the get and put routines in
      * this class.
      */
     @ForceInline
     public Object staticFieldBase(Field f) {
+        if (f == null) {
+            throw new NullPointerException();
+        }
+        if (f.getDeclaringClass().isHidden()) {
+            throw new UnsupportedOperationException("can't get base address on a hidden class: " + f);
+        }
         return theInternalUnsafe.staticFieldBase(f);
     }
 
     /**
      * Detects if the given class may need to be initialized. This is often

@@ -818,15 +837,20 @@
      * <li>Utf8: a string (must have suitable syntax if used as signature or name)
      * <li>Class: any java.lang.Class object
      * <li>String: any object (not just a java.lang.String)
      * <li>InterfaceMethodRef: (NYI) a method handle to invoke on that call site's arguments
      * </ul>
+     *
+     * @deprecated Use the {@link java.lang.invoke.MethodHandles.Lookup#defineHiddenClass(byte[], boolean, MethodHandles.Lookup.ClassOption...)}
+     * method.
+     *
      * @param hostClass context for linkage, access control, protection domain, and class loader
      * @param data      bytes of a class file
      * @param cpPatches where non-null entries exist, they replace corresponding CP entries in data
      */
     @ForceInline
+    @Deprecated(since = "15", forRemoval = false)
     public Class<?> defineAnonymousClass(Class<?> hostClass, byte[] data, Object[] cpPatches) {
         return theInternalUnsafe.defineAnonymousClass(hostClass, data, cpPatches);
     }
 
     /**