test/hotspot/jtreg/runtime/exceptionMsgs/NoClassDefFoundError/NoClassDefFoundErrorTest.java

rev 50339 : 8203824: Chain exception from initialization in later NoClassDefFoundErrors.

*** 1,7 ****
  /*
!  * Copyright (c) 2017, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2017, 2018, 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.
*** 19,51 ****
   * 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 8056900
   * @summary Verifies message returned with NoClassDefFoundError exception.
   * @library /test/lib
   * @modules java.base/jdk.internal.misc
   *          java.compiler
!  * @run main/native NoClassDefFoundMsg
   */
  
  import jdk.test.lib.compiler.InMemoryJavaCompiler;
  import jdk.internal.misc.Unsafe;
  
! public class NoClassDefFoundMsg {
  
      static native void callDefineClass(String className);
      static native void callFindClass(String className);
      static {
          System.loadLibrary("NoClassDefFoundMsg");
      }
  
! 
!     public static void main(String args[]) throws Exception {
          Unsafe unsafe = Unsafe.getUnsafe();
  
          byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
  
          // Create a class name of length 65536.
--- 19,52 ----
   * 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 8056900
   * @summary Verifies message returned with NoClassDefFoundError exception.
   * @library /test/lib
   * @modules java.base/jdk.internal.misc
   *          java.compiler
!  * @run main/native NoClassDefFoundErrorTest
   */
  
+ import jdk.test.lib.Asserts;
  import jdk.test.lib.compiler.InMemoryJavaCompiler;
  import jdk.internal.misc.Unsafe;
  
! public class NoClassDefFoundErrorTest {
  
      static native void callDefineClass(String className);
      static native void callFindClass(String className);
      static {
          System.loadLibrary("NoClassDefFoundMsg");
      }
  
!     // Test illegal class names. Too long or null.
!     static void test_classNames() throws Exception {
          Unsafe unsafe = Unsafe.getUnsafe();
  
          byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");
  
          // Create a class name of length 65536.
*** 92,97 ****
--- 93,151 ----
              if (!e.getMessage().contains("No class name given")) {
                  throw new RuntimeException("Wrong NoClassDefFoundError: " + e.getMessage());
              }
          }
      }
+ 
+     private static class ClassWithFailedInitializer {
+         public static final int i = (new Object[1])[0].hashCode();
+     }
+ 
+     // If static initialization of a class failed, later access to it
+     // throws a NoClassDefFoundError. This error chains the exeption
+     // thrown in the previous initialization. This test assures this is
+     // working properly.
+     static void test_chainStaticInitializerException() throws Exception {
+         Object[] o = new Object[1024];
+         System.gc();
+ 
+         try {
+             if (ClassWithFailedInitializer.i == 0) {
+                 throw new RuntimeException("Class initialization succeeded but is designed to fail.");
+             }
+             throw new Exception("Expected exception was not thrown.");
+         }
+         catch (ExceptionInInitializerError e) {
+             Asserts.assertNE(e.getCause(), null, "Expecting cause in ExceptionInInitializerError.");
+             Asserts.assertEQ(e.getCause().getClass(), NullPointerException.class, "sanity");
+         }
+ 
+         // Make sure the VM kept the stored exception alive.
+         o = null;
+         System.gc();
+         o = new Object[16384];
+         o = new Object[16384];
+         o = new Object[16384];
+         o = new Object[16384];
+         System.gc();
+ 
+         try {
+             if (ClassWithFailedInitializer.i == 0) {
+                 throw new RuntimeException("Class initialization succeeded but is designed to fail.");
+             }
+             throw new Exception("Expected exception was not thrown.");
+         } catch (NoClassDefFoundError e) {
+             e.printStackTrace();
+             Asserts.assertNE(o, null, "sanity");
+             Asserts.assertNE(e.getCause(), null, "Expecting chained exception");
+             Asserts.assertEQ(e.getCause().getClass(), ExceptionInInitializerError.class,
+                              "Wrong exception chained: " + e.getCause());
+             System.identityHashCode(e.getCause());
+             System.identityHashCode(e);
+         }
+     }
+ 
+     public static void main(String args[]) throws Exception {
+         test_classNames();
+         test_chainStaticInitializerException();
+     }
  }