8025141: java.lang.ClassFormatError: Illegal field modifiers in class (...)
Summary: Should not generate non-public $assertionsDisabled field into interfaces
Reviewed-by: jjg, vromero
--- a/langtools/src/share/classes/com/sun/tools/javac/comp/Lower.java Tue Oct 08 15:33:28 2013 +0200
+++ b/langtools/src/share/classes/com/sun/tools/javac/comp/Lower.java Wed Oct 09 13:06:49 2013 +0200
@@ -2172,6 +2172,18 @@
* Code for enabling/disabling assertions.
*************************************************************************/
+ private ClassSymbol assertionsDisabledClassCache;
+
+ /**Used to create an auxiliary class to hold $assertionsDisabled for interfaces.
+ */
+ private ClassSymbol assertionsDisabledClass() {
+ if (assertionsDisabledClassCache != null) return assertionsDisabledClassCache;
+
+ assertionsDisabledClassCache = makeEmptyClass(STATIC | SYNTHETIC, outermostClassDef.sym).sym;
+
+ return assertionsDisabledClassCache;
+ }
+
// This code is not particularly robust if the user has
// previously declared a member named '$assertionsDisabled'.
// The same faulty idiom also appears in the translation of
@@ -2182,8 +2194,9 @@
// Outermost class may be either true class or an interface.
ClassSymbol outermostClass = outermostClassDef.sym;
- // note that this is a class, as an interface can't contain a statement.
- ClassSymbol container = currentClass;
+ //only classes can hold a non-public field, look for a usable one:
+ ClassSymbol container = !currentClass.isInterface() ? currentClass :
+ assertionsDisabledClass();
VarSymbol assertDisabledSym =
(VarSymbol)lookupSynthetic(dollarAssertionsDisabled,
@@ -2208,6 +2221,16 @@
JCVariableDecl assertDisabledDef = make.VarDef(assertDisabledSym,
notStatus);
containerDef.defs = containerDef.defs.prepend(assertDisabledDef);
+
+ if (currentClass.isInterface()) {
+ //need to load the assertions enabled/disabled state while
+ //initializing the interface:
+ JCClassDecl currentClassDef = classDef(currentClass);
+ make_at(currentClassDef.pos());
+ JCStatement dummy = make.If(make.QualIdent(assertDisabledSym), make.Skip(), null);
+ JCBlock clinit = make.Block(STATIC, List.<JCStatement>of(dummy));
+ currentClassDef.defs = currentClassDef.defs.prepend(clinit);
+ }
}
make_at(pos);
return makeUnary(NOT, make.Ident(assertDisabledSym));
@@ -3929,6 +3952,7 @@
accessConstrTags = null;
accessed = null;
enumSwitchMap.clear();
+ assertionsDisabledClassCache = null;
}
return translated.toList();
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/defaultMethods/Assertions.java Wed Oct 09 13:06:49 2013 +0200
@@ -0,0 +1,102 @@
+/*
+ * 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.
+ */
+package test;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+/*
+ * @test
+ * @bug 8025141
+ * @summary Interfaces must not contain non-public fields, ensure $assertionsDisabled
+ * is not generated into an interface
+ * @compile Assertions.java
+ * @run main/othervm -da test.Assertions
+ * @run main/othervm -ea:test.Assertions test.Assertions Inner
+ * @run main/othervm -ea:test.Outer test.Assertions Outer
+ * @run main/othervm -ea:test.Another test.Assertions Another.Inner
+ * @run main/othervm -ea:test... test.Assertions Inner Outer Another.Inner
+ */
+
+public class Assertions {
+ interface Inner {
+ default void testInner() {
+ assert false;
+ }
+ }
+
+ static class InnerImpl implements Inner {}
+
+ static class OuterImpl implements Outer {}
+
+ static class AnotherInnerImpl implements Another.Inner {}
+
+ public static void main(String... args) {
+ Set<String> shouldThrowAssert = new HashSet<String>(Arrays.asList(args));
+ try {
+ new InnerImpl().testInner();
+ if (shouldThrowAssert.contains("Inner")) {
+ throw new IllegalStateException("AssertionError expected, but not thrown.");
+ }
+ } catch (AssertionError e) {
+ if (!shouldThrowAssert.contains("Inner")) {
+ throw new IllegalStateException("AssertionError not expected, but thrown.");
+ }
+ }
+ try {
+ new OuterImpl().testOuter();
+ if (shouldThrowAssert.contains("Outer")) {
+ throw new IllegalStateException("AssertionError expected, but not thrown.");
+ }
+ } catch (AssertionError e) {
+ if (!shouldThrowAssert.contains("Outer")) {
+ throw new IllegalStateException("AssertionError not expected, but thrown.");
+ }
+ }
+ try {
+ new AnotherInnerImpl().testAnotherInner();
+ if (shouldThrowAssert.contains("Another.Inner")) {
+ throw new IllegalStateException("AssertionError expected, but not thrown.");
+ }
+ } catch (AssertionError e) {
+ if (!shouldThrowAssert.contains("Another.Inner")) {
+ throw new IllegalStateException("AssertionError not expected, but thrown.");
+ }
+ }
+ }
+}
+
+interface Outer {
+ default void testOuter() {
+ assert false;
+ }
+}
+
+@interface Another {
+ interface Inner {
+ default void testAnotherInner() {
+ assert false;
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/defaultMethods/CannotChangeAssertionsStateAfterInitialized.java Wed Oct 09 13:06:49 2013 +0200
@@ -0,0 +1,43 @@
+/*
+ * 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 8025141
+ * @summary Ensure the assertion status cannot be changed once the class is initialized
+ * @compile CannotChangeAssertionsStateAfterInitialized.java
+ * @run main/othervm -da CannotChangeAssertionsStateAfterInitialized
+ */
+
+public interface CannotChangeAssertionsStateAfterInitialized {
+ default void m() {
+ assert false;
+ }
+
+ public static void main(String[] args) {
+ ClassLoader cl = CannotChangeAssertionsStateAfterInitialized.class.getClassLoader();
+ cl.setClassAssertionStatus(CannotChangeAssertionsStateAfterInitialized.class.getName(), true);
+ new CannotChangeAssertionsStateAfterInitialized() {}.m();
+ }
+
+}