test/hotspot/jtreg/runtime/LoaderConstraints/vtableLdrConstraint/Test.java

*** 33,89 ****
   * @run main/othervm Test
   */
  
  public class Test {
  
!     static String expectedErrorMessage1 =
          "loader constraint violation for class test.Task: " +
          "when selecting overriding method test.Task.m()Ltest/Foo; " +
!         "the class loader \"<unnamed>\" (instance of PreemptingClassLoader, " +
!         "child of \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "of the selected method's type test.Task, " +
!         "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "for its super type test.J " +
          "have different Class objects for the type test.Foo used in the signature";
  
!     static String expectedErrorMessage2 =
          "loader constraint violation for class test.Task: " +
          "when selecting overriding method test.Task.m()Ltest/Foo; " +
!         "the class loader \"VtableLdrCnstrnt_Test_Loader\" (instance of PreemptingClassLoader, " +
!         "child of \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "of the selected method's type test.Task, " +
!         "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "for its super type test.J " +
          "have different Class objects for the type test.Foo used in the signature";
  
      // Test that the error message is correct when a loader constraint error is
      // detected during vtable creation.
      //
      // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
      // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
      // are different.  So, a LinkageError exception should be thrown because the
      // loader constraint check will fail.
!     public static void test(String loaderName, String expectedErrorMessage) throws Exception {
          Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
          String[] classNames = {"test.Task", "test.Foo", "test.I"};
          ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
          l.loadClass("test.Foo");
          try {
              l.loadClass("test.Task").newInstance();
              throw new RuntimeException("Expected LinkageError exception not thrown");
          } catch (LinkageError e) {
              String errorMsg = e.getMessage();
!             if (!errorMsg.equals(expectedErrorMessage)) {
!                 System.out.println("Expected: " + expectedErrorMessage + "\n" +
                                     "but got:  " + errorMsg);
                  throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
              }
              System.out.println("Passed with message: " + errorMsg);
          }
      }
  
      public static void main(String args[]) throws Exception {
!         test(null, expectedErrorMessage1);
!         test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2);
      }
  }
  
--- 33,98 ----
   * @run main/othervm Test
   */
  
  public class Test {
  
!     // Break expected error messages into 2 parts since the loader name includes its identity
!     // hash which is unique and can't be compared against.
!     static String expectedErrorMessage1_part1 =
          "loader constraint violation for class test.Task: " +
          "when selecting overriding method test.Task.m()Ltest/Foo; " +
!         "the class loader PreemptingClassLoader @";
!     static String expectedErrorMessage1_part2 =
!         " (instance of PreemptingClassLoader, " +
!         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "of the selected method's type test.Task, " +
!         "and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "for its super type test.J " +
          "have different Class objects for the type test.Foo used in the signature";
  
!     static String expectedErrorMessage2_part1 =
          "loader constraint violation for class test.Task: " +
          "when selecting overriding method test.Task.m()Ltest/Foo; " +
!         "the class loader 'VtableLdrCnstrnt_Test_Loader' @";
!     static String expectedErrorMessage2_part2 =
!         " (instance of PreemptingClassLoader, " +
!         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "of the selected method's type test.Task, " +
!         "and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
          "for its super type test.J " +
          "have different Class objects for the type test.Foo used in the signature";
  
      // Test that the error message is correct when a loader constraint error is
      // detected during vtable creation.
      //
      // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
      // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
      // are different.  So, a LinkageError exception should be thrown because the
      // loader constraint check will fail.
!     public static void test(String loaderName,
!                             String expectedErrorMessage_part1,
!                             String expectedErrorMessage_part2) throws Exception {
          Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
          String[] classNames = {"test.Task", "test.Foo", "test.I"};
          ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
          l.loadClass("test.Foo");
          try {
              l.loadClass("test.Task").newInstance();
              throw new RuntimeException("Expected LinkageError exception not thrown");
          } catch (LinkageError e) {
              String errorMsg = e.getMessage();
!             if (!errorMsg.contains(expectedErrorMessage_part1) || 
!                 !errorMsg.contains(expectedErrorMessage_part2)) {
!                 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
                                     "but got:  " + errorMsg);
                  throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
              }
              System.out.println("Passed with message: " + errorMsg);
          }
      }
  
      public static void main(String args[]) throws Exception {
!         test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2);
!         test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2);
      }
  }