Fixes for the new future default

Author: vjovanov

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/hub/ClassForNameSupport.java

@@ -483,6 +483,9 @@ public static boolean isUnsafeAllocatedPreserved(Class<?> jClass) {
     }
 
     public static boolean isRegisteredClass(String className) {
+        if (!ClassNameSupport.isValidReflectionName(className)) {
+            return true;
+        }
         if (respectClassLoader()) {
             RuntimeDynamicAccessMetadata dynamicAccessMetadata = getDynamicAccessMetadataForName(className);
             if (dynamicAccessMetadata == null) {

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/hub/registry/ClassRegistries.java

@@ -197,6 +197,9 @@ private Class<?> resolve(String name, ClassLoader loader) throws ClassNotFoundEx
             arrayDimensions++;
         }
         if (arrayDimensions == name.length()) {
+            if (loader == null) {
+                return null;
+            }
             throw new ClassNotFoundException(name);
         }
         Class<?> elementalResult;
@@ -271,7 +274,7 @@ private static Class<?> getArrayClass(String name, Class<?> elementalResult, int
                 if (RuntimeClassLoading.isSupported()) {
                     RuntimeClassLoading.getOrCreateArrayHub(hub);
                 } else {
-                    if (throwMissingRegistrationErrors()) {
+                    if (throwMissingRegistrationErrors() && shouldFollowReflectionConfiguration() && !ClassForNameSupport.isRegisteredClass(name)) {
                         MissingReflectionRegistrationUtils.reportClassAccess(name);
                     }
                     return null;