1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8186092
  27  * @compile ../common/Foo.java
  28  * @compile ../common/J.java
  29  * @compile I.java
  30  * @compile ../common/C.jasm
  31  * @compile Task.java
  32  * @compile ../common/PreemptingClassLoader.java
  33  * @run main/othervm Test
  34  */
  35 
  36 public class Test {
  37 
  38     // Test that the error message is correct when a loader constraint error is
  39     // detected during itable creation.
  40     //
  41     // In this test, during itable creation for class C, method "m()LFoo;" for
  42     // C's super interface I has a different class Foo than the selected method's
  43     // type super interface J.  The selected method is not an overpass method nor
  44     // otherwise excluded from loader constraint checking.  So, a LinkageError
  45     // exception should be thrown because the loader constraint check will fail.
  46     public static void main(String... args) throws Exception {
  47         Class<?> c = Foo.class; // forces standard class loader to load Foo
  48         ClassLoader l = new PreemptingClassLoader("Task", "Foo", "C", "I");
  49         Runnable r = (Runnable) l.loadClass("Task").newInstance();
  50         try {
  51             r.run();
  52             throw new RuntimeException("Expected LinkageError exception not thrown");
  53         } catch (java.lang.LinkageError e) {
  54             if (!e.getMessage().contains(
  55                 "loader constraint violation in interface itable initialization for class C:")) {
  56                 throw new RuntimeException("Wrong LinkageError exception thrown: " + e.getMessage());
  57             }
  58         }
  59     }
  60 }