8026394: Eclipse fails with JDK8 build 111

Summary: If the resolved interface does not itself contain "clone" or "finalize" methods, the method/interface method resolution looks to the interface's super class, java.lang.Object.  With the JDK 8 interface method accessability check requirement, since these two methods are declared within Object as protected, they must be special cased in LinkResolver::check_method_accessability() in order to avoid an IAE.
Reviewed-by: acorn, dholmes
Contributed-by: lois.foltan@oracle.com

src/share/vm/interpreter/linkResolver.cpp

 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -419,18 +418,28 @@ void LinkResolver::check_method_accessability(KlassHandle ref_klass,
 
   AccessFlags flags = sel_method->access_flags();
 
-  // Special case:  arrays always override "clone". JVMS 2.15.
+  // Special case #1:  arrays always override "clone". JVMS 2.15.
   // If the resolved klass is an array class, and the declaring class
   // is java.lang.Object and the method is "clone", set the flags
   // to public.
+  // Special case #2:  If the resolved klass is an interface, and
+  // the declaring class is java.lang.Object, and the method is
+  // "clone" or "finalize", set the flags to public. If the
+  // resolved interface does not contain "clone" or "finalize"
+  // methods, the method/interface method resolution looks to
+  // the interface's super class, java.lang.Object.  With JDK 8
+  // interface accessability check requirement, special casing
+  // this scenario is necessary to avoid an IAE.
   //
-  // We'll check for the method name first, as that's most likely
-  // to be false (so we'll short-circuit out of these tests).
-  if (sel_method->name() == vmSymbols::clone_name() &&
-      sel_klass() == SystemDictionary::Object_klass() &&
-      resolved_klass->oop_is_array()) {
+  // We'll check for each method name first and then java.lang.Object
+  // to best short-circuit out of these tests.
+  if (((sel_method->name() == vmSymbols::clone_name() &&
+        (resolved_klass->oop_is_array() || resolved_klass->is_interface())) ||
+       (sel_method->name() == vmSymbols::finalize_method_name() &&
+        resolved_klass->is_interface())) &&
+      sel_klass() == SystemDictionary::Object_klass()) {
     // We need to change "protected" to "public".
-    assert(flags.is_protected(), "clone not protected?");
+    assert(flags.is_protected(), "clone or finalize not protected?");
     jint new_flags = flags.as_int();
     new_flags = new_flags & (~JVM_ACC_PROTECTED);
     new_flags = new_flags | JVM_ACC_PUBLIC;

test/runtime/8026394/InterfaceObjectTest.java

+/*
+ * Copyright (c) 2013, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8026394
+ * @summary clone() and finalize() interface resolution should not receive IAE
+ * @run main InterfaceObjectTest
+ */
+interface IClone extends Cloneable {
+    void finalize() throws Throwable;
+    Object clone();
+}
+
+interface ICloneExtend extends IClone { }
+
+public class InterfaceObjectTest implements ICloneExtend {
+
+    public Object clone() {
+        System.out.println("In InterfaceObjectTest's clone() method\n");
+        return null;
+    }
+
+    public void finalize() throws Throwable {
+        try {
+            System.out.println("In InterfaceObjectTest's finalize() method\n");
+        } catch (Throwable t) {
+            throw new AssertionError(t);
+        }
+    }
+
+    public static void tryIt(ICloneExtend o1) {
+        try {
+            Object o2 = o1.clone();
+            o1.finalize();
+        } catch (Throwable t) {
+            if (t instanceof IllegalAccessError) {
+                System.out.println("TEST FAILS - IAE resulted\n");
+                System.exit(1);
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+        InterfaceObjectTest o1 = new InterfaceObjectTest();
+        tryIt(o1);
+        System.out.println("TEST PASSES - no IAE resulted\n");
+    }
+}