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

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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 


  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 = " attempted duplicate class definition for test.Foo. (test.Foo is in unnamed module of loader PreemptingClassLoader @";
  44     static String expectedErrorMessage1_part3 = ", parent loader 'app')";


  45 
  46     // Check that all names have external formatting ('.' and not '/' in package names).
  47     // Check for name and parent of class loader.
  48     static String expectedErrorMessage2_part1 = "loader 'DuplicateLE_Test_Loader' @";
  49     static String expectedErrorMessage2_part2 = " attempted duplicate class definition for test.Foo. (test.Foo is in unnamed module of loader 'DuplicateLE_Test_Loader' @";
  50     static String expectedErrorMessage2_part3 = ", parent loader 'app')";


  51 
  52     // Check that all names have external formatting ('.' and not '/' in package names).
  53     // Check for name and parent of class loader. Type should be mentioned as 'interface'.
  54     static String expectedErrorMessage3_part1 = "loader 'DuplicateLE_Test_Loader_IF' @";
  55     static String expectedErrorMessage3_part2 = " attempted duplicate interface definition for test.J. (test.J is in unnamed module of loader 'DuplicateLE_Test_Loader_IF' @";
  56     static String expectedErrorMessage3_part3 = ", parent loader 'app')";
  57 

  58 
  59     // Test that the error message is correct when a loader constraint error is
  60     // detected during vtable creation.
  61     //
  62     // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
  63     // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
  64     // are different.  So, a LinkageError exception should be thrown because the
  65     // loader constraint check will fail.
  66     public static void test(String loaderName,
  67                             String expectedErrorMessage_part1,
  68                             String expectedErrorMessage_part2,
  69                             String expectedErrorMessage_part3,
  70                             String testType) throws Exception {
  71         String[] classNames = {testType};
  72         ClassLoader l = new PreemptingClassLoader(loaderName, classNames, false);
  73         l.loadClass(testType);
  74         try {
  75             l.loadClass(testType).newInstance();
  76             throw new RuntimeException("Expected LinkageError exception not thrown");
  77         } catch (LinkageError e) {
  78             String errorMsg = e.getMessage();
  79             if (!errorMsg.contains(expectedErrorMessage_part1) ||
  80                 !errorMsg.contains(expectedErrorMessage_part2) ||
  81                 !errorMsg.contains(expectedErrorMessage_part3)) {
  82                 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
  83                                    "but got:  " + errorMsg);
  84                 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
  85             }
  86             System.out.println("Passed with message: " + errorMsg);
  87         }
  88     }
  89 
  90     public static void main(String args[]) throws Exception {
  91         test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2,
  92              expectedErrorMessage1_part3, "test.Foo");
  93         test("DuplicateLE_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2,
  94              expectedErrorMessage2_part3, "test.Foo");
  95         test("DuplicateLE_Test_Loader_IF", expectedErrorMessage3_part1, expectedErrorMessage3_part2,
  96              expectedErrorMessage3_part3, "test.J");
  97     }
  98 }

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