1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
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   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
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  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
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  23 
  24 /**
  25  * @test
  26  * @bug 8199852
  27  * @summary Test exception messages of LinkageError. A class loader loads
  28  *          twice the same class. Should trigger exception in
  29  *          SystemDictionary::check_constraints().
  30  * @compile ../common/Foo.java
  31  * @compile ../common/J.java
  32  *          ../common/PreemptingClassLoader.java
  33  * @run main/othervm Test
  34  */
  35 
  36 public class Test {
  37 
  38     // Check that all names have external formatting ('.' and not '/' in package names).
  39     // Check for parent of class loader.
  40     // Break each expectedErrorMessage into 2 parts due to the class loader name containing
  41     // the unique @<id> identity hash which cannot be compared against.
  42     static String expectedErrorMessage1_part1 = "loader PreemptingClassLoader @";
  43     static String expectedErrorMessage1_part2 =
  44         " (instance of PreemptingClassLoader, " +
  45         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  46         "attempted duplicate class definition for test.Foo.";
  47 
  48     // Check that all names have external formatting ('.' and not '/' in package names).
  49     // Check for name and parent of class loader.
  50     static String expectedErrorMessage2_part1 = "loader 'DuplicateLE_Test_Loader' @";
  51     static String expectedErrorMessage2_part2 =
  52         " (instance of PreemptingClassLoader, " +
  53         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  54         "attempted duplicate class definition for test.Foo.";
  55 
  56     // Check that all names have external formatting ('.' and not '/' in package names).
  57     // Check for name and parent of class loader. Type should be mentioned as 'interface'.
  58     static String expectedErrorMessage3_part1 = "loader 'DuplicateLE_Test_Loader_IF' @";
  59     static String expectedErrorMessage3_part2 =
  60         " (instance of PreemptingClassLoader, " +
  61         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  62         "attempted duplicate interface definition for test.J.";
  63 
  64     // Test that the error message is correct when a loader constraint error is
  65     // detected during vtable creation.
  66     //
  67     // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
  68     // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
  69     // are different.  So, a LinkageError exception should be thrown because the
  70     // loader constraint check will fail.
  71     public static void test(String loaderName, String expectedErrorMessage_part1,
  72                             String expectedErrorMessage_part2, String testType) throws Exception {
  73         String[] classNames = {testType};
  74         ClassLoader l = new PreemptingClassLoader(loaderName, classNames, false);
  75         l.loadClass(testType);
  76         try {
  77             l.loadClass(testType).newInstance();
  78             throw new RuntimeException("Expected LinkageError exception not thrown");
  79         } catch (LinkageError e) {
  80             String errorMsg = e.getMessage();
  81             if (!errorMsg.contains(expectedErrorMessage_part1) ||
  82                 !errorMsg.contains(expectedErrorMessage_part2)) {
  83                 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
  84                                    "but got:  " + errorMsg);
  85                 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
  86             }
  87             System.out.println("Passed with message: " + errorMsg);
  88         }
  89     }
  90 
  91     public static void main(String args[]) throws Exception {
  92         test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2, "test.Foo");
  93         test("DuplicateLE_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2, "test.Foo");
  94         test("DuplicateLE_Test_Loader_IF", expectedErrorMessage3_part1, expectedErrorMessage3_part2, "test.J");
  95     }
  96 }
  97