--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/lambda-features/InterfaceInitializationStates.java Wed Sep 21 09:56:18 2016 -0400
@@ -0,0 +1,202 @@
+/*
+ * Copyright (c) 2016, 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 8163969
+ * @summary Test interface initialization states and when certain interfaces are initialized
+ * in the presence of initialization errors.
+ * @run main InterfaceInitializationStates
+ */
+
+import java.util.List;
+import java.util.Arrays;
+import java.util.ArrayList;
+
+public class InterfaceInitializationStates {
+
+ static List<Class<?>> cInitOrder = new ArrayList<>();
+
+ // K interface with a default method has an initialization error
+ interface K {
+ boolean v = InterfaceInitializationStates.out(K.class);
+ static final Object CONST = InterfaceInitializationStates.someMethod();
+ default int method() { return 2; }
+ }
+
+ // I is initialized when CONST is used, and doesn't trigger initialization of K,
+ // I also doesn't get an initialization error just because K has an initialization error.
+ interface I extends K {
+ boolean v = InterfaceInitializationStates.out(I.class);
+ static final Object CONST = InterfaceInitializationStates.someMethod();
+ }
+
+ // L can be fully initialized even though it extends an interface that has an
+ // initialization error
+ interface L extends K {
+ boolean v = InterfaceInitializationStates.out(L.class);
+ default void lx() {}
+ static void func() {
+ System.out.println("Calling function on interface with bad super interface.");
+ }
+ }
+
+ // Another interface needing initialization.
+ // Initialization of this interface does not occur with ClassLIM because K throws
+ // an initialization error, so the interface initialization is abandoned
+ interface M {
+ boolean v = InterfaceInitializationStates.out(M.class);
+ default void mx() {}
+ }
+
+ static class ClassLIM implements L, I, M {
+ boolean v = InterfaceInitializationStates.out(ClassLIM.class);
+ int callMethodInK() { return method(); }
+ static {
+ // Since interface initialization of K fails, this should never be called
+ System.out.println("Initializing C, but L is still good");
+ L.func();
+ }
+ }
+
+ // Finally initialize M
+ static class ClassM implements M {
+ boolean v = InterfaceInitializationStates.out(ClassM.class);
+ }
+
+ // Iunlinked is testing initialization like interface I, except interface I is linked when
+ // ClassLIM is linked.
+ // Iunlinked is not linked already when K gets an initialization error. Linking Iunlinked
+ // should succeed and not get NoClassDefFoundError because it does not depend on the
+ // initialization state of K for linking. There's bug now where it gets this error.
+ // See: https://bugs.openjdk.java.net/browse/JDK-8166203.
+ interface Iunlinked extends K {
+ boolean v = InterfaceInitializationStates.out(Iunlinked.class);
+ }
+
+ // More tests. What happens if we use K for parameters and return types?
+ // K is a symbolic reference in the constant pool and the initialization error only
+ // matters when it's used.
+ interface Iparams {
+ boolean v = InterfaceInitializationStates.out(Iparams.class);
+ K the_k = null;
+ K m(K k); // abstract
+ default K method() { return new K(){}; }
+ }
+
+ static class ClassIparams implements Iparams {
+ boolean v = InterfaceInitializationStates.out(ClassIparams.class);
+ public K m(K k) { return k; }
+ }
+
+ public static void main(java.lang.String[] unused) {
+ // The rule this tests is the last sentence of JLS 12.4.1:
+
+ // When a class is initialized, its superclasses are initialized (if they have not
+ // been previously initialized), as well as any superinterfaces (s8.1.5) that declare any
+ // default methods (s9.4.3) (if they have not been previously initialized). Initialization
+ // of an interface does not, of itself, cause initialization of any of its superinterfaces.
+
+ // Trigger initialization.
+ // Now L is fully_initialized even though K should
+ // throw an error during initialization.
+ boolean v = L.v;
+ L.func();
+
+ try {
+ ClassLIM c = new ClassLIM(); // is K initialized, with a perfectly good L in the middle
+ // was bug: this used to succeed and be able to callMethodInK().
+ throw new RuntimeException("FAIL exception not thrown for class");
+ } catch (ExceptionInInitializerError e) {
+ System.out.println("ExceptionInInitializerError thrown as expected");
+ }
+
+ // Test that K already has initialization error so gets ClassNotFoundException because
+ // initialization was attempted with ClassLIM.
+ try {
+ Class.forName("InterfaceInitializationStates$K", true, InterfaceInitializationStates.class.getClassLoader());
+ throw new RuntimeException("FAIL exception not thrown for forName(K)");
+ } catch(ClassNotFoundException e) {
+ throw new RuntimeException("ClassNotFoundException should not be thrown");
+ } catch(NoClassDefFoundError e) {
+ System.out.println("NoClassDefFoundError thrown as expected");
+ }
+
+ new ClassM();
+
+ // Initialize I, which doesn't cause K (super interface) to be initialized.
+ // Since the initialization of I does _not_ cause K to be initialized, it does
+ // not get NoClassDefFoundError because K is erroneous.
+ // But the initialization of I throws RuntimeException, so we expect
+ // ExceptionInInitializerError.
+ try {
+ Object ii = I.CONST;
+ throw new RuntimeException("FAIL exception not thrown for I's initialization");
+ } catch (ExceptionInInitializerError e) {
+ System.out.println("ExceptionInInitializerError as expected");
+ }
+
+ // Initialize Iunlinked. This should not get NoClassDefFoundError because K
+ // (its super interface) is in initialization_error state.
+ // This is a bug. It does now.
+ try {
+ boolean bb = Iunlinked.v;
+ throw new RuntimeException("FAIL exception not thrown for Iunlinked initialization");
+ } catch(NoClassDefFoundError e) {
+ System.out.println("NoClassDefFoundError thrown because of bug");
+ }
+
+ // This should be okay
+ boolean value = Iparams.v;
+ System.out.println("value is " + value);
+
+ ClassIparams p = new ClassIparams();
+ try {
+ // Now we get an error because K got an initialization_error
+ K kk = p.method();
+ throw new RuntimeException("FAIL exception not thrown for calling method for K");
+ } catch(NoClassDefFoundError e) {
+ System.out.println("NoClassDefFoundError thrown as expected");
+ }
+
+ // Check expected class initialization order
+ List<Class<?>> expectedCInitOrder = Arrays.asList(L.class, K.class, M.class, ClassM.class,
+ I.class, Iparams.class,
+ ClassIparams.class);
+ if (!cInitOrder.equals(expectedCInitOrder)) {
+ throw new RuntimeException(
+ String.format("Class initialization array %s not equal to expected array %s",
+ cInitOrder, expectedCInitOrder));
+ }
+ }
+
+ static boolean out(Class c) {
+ System.out.println("#: initializing " + c.getName());
+ cInitOrder.add(c);
+ return true;
+ }
+ static Object someMethod() {
+ throw new RuntimeException();
+ }
+}