--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/InvocationTests/invokevirtual/Checker.java	Wed Jun 26 09:06:32 2019 -0400
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2009, 2019, 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.
+ *
+ */
+
+package invokevirtual;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+
+public class Checker extends shared.Checker {
+    public Checker(Class staticTargetClass, Class dynamicTargetClass) {
+        super(staticTargetClass, dynamicTargetClass);
+    }
+
+    public String check (Class callerClass) {
+        Method m;
+        try {
+            // May cause java.lang.VerifyError
+            m = getOverriddenMethod();
+        } catch (Throwable e) {
+            return e.getClass().getName();
+        }
+
+        // Check method accessibility (it's a static property, according to JLS #6.6: Access Control)
+        if (m != null) {
+            Method staticTargetMethod = getDeclaredMethod(staticTargetClass);
+
+            if (checkAccess(staticTargetMethod, callerClass)) {
+                // Can't invoke abstract method
+                if ( Modifier.isAbstract(m.getModifiers())) {
+                    return "java.lang.AbstractMethodError";
+                }
+
+                return String.format("%s.%s"
+                        , m.getDeclaringClass().getSimpleName()
+                        , methodName
+                        );
+            } else {
+                // if method isn't accessible, IllegalAccessError is thrown
+                return "java.lang.IllegalAccessError";
+            }
+        } else {
+            // if method == null, NoSuchMethodError is thrown
+            return "java.lang.NoSuchMethodError";
+        }
+    }
+
+    public Method getOverriddenMethod() {
+        return getOverriddenMethod(staticTargetClass, dynamicTargetClass);
+    }
+
+    public Method getOverriddenMethod(Class staticTarget, Class dynamicTarget) {
+        // Assertion #1. C is a subclass of A
+        if (!staticTarget.isAssignableFrom(dynamicTarget)) {
+            return null;
+        }
+
+        Method staticTargetMethod = getDeclaredMethod(staticTarget);
+        Method dynamicTargetMethod = getDeclaredMethod(dynamicTarget);
+
+        if (staticTarget.equals(dynamicTarget)) {
+            return staticTargetMethod;
+        }
+
+        // TODO: ? need to find out the right behavior
+        if (staticTargetMethod == null) {
+            return null;
+        }
+
+        // Dynamic target doesn't have desired method, so check it's superclass
+        if (dynamicTargetMethod == null) {
+            return getOverriddenMethod(staticTarget, dynamicTarget.getSuperclass());
+        } else {
+            // Private method can't override anything
+            if (Modifier.isPrivate(dynamicTargetMethod.getModifiers())) {
+                return getOverriddenMethod(staticTarget, dynamicTarget.getSuperclass());
+            }
+        }
+
+        // TODO: abstract methods
+
+        //Assertion #3.a: A.m2 is PUB || PROT || (PP && PKG(A) == PKG(C))
+        int staticTargetModifiers = staticTargetMethod.getModifiers();
+        {
+            boolean isPublic = Modifier.isPublic(staticTargetModifiers);
+            boolean isProtected = Modifier.isProtected(staticTargetModifiers);
+            boolean isPrivate = Modifier.isPrivate(staticTargetModifiers) ;
+            String staticTargetPkg = getClassPackageName(staticTarget);
+            String dynamicTargetPkg = getClassPackageName(dynamicTarget);
+
+            if ( isPublic || isProtected
+                 || ( !isPublic && !isProtected && !isPrivate
+                      && staticTargetPkg.equals(dynamicTargetPkg)
+                    ))
+            {
+                return dynamicTargetMethod;
+            }
+        }
+        // OR
+        //Assertion #3.b: exists m3: C.m1 != B.m3, A.m2 != B.m3, B.m3 overrides A.m2, C.m1 overrides B.m3
+        Class ancestor = dynamicTarget.getSuperclass();
+        while (ancestor != staticTarget) {
+            Method OverriddenM2 = getOverriddenMethod(staticTarget, ancestor);
+            Method m3 = getDeclaredMethod(ancestor);
+            Method m1 = getOverriddenMethod(ancestor, dynamicTarget);
+
+            if (m1 != null && m3 != null) {
+                if (m1.equals(dynamicTargetMethod) && m3.equals(OverriddenM2)) {
+                    return dynamicTargetMethod;
+                }
+            } else {
+                if (m1 == null && dynamicTargetMethod == null
+                    && m3 == null && OverriddenM2 == null)
+                {
+                    return null;
+                }
+            }
+
+            ancestor = ancestor.getSuperclass();
+        }
+
+        return getOverriddenMethod(staticTarget, dynamicTarget.getSuperclass());
+    }
+}