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

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  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8186092 8199852
  27  * @compile ../common/Foo.java
  28  *          ../common/J.java
  29  *          I.java
  30  *          ../common/C.jasm
  31  *          Task.java
  32  *          ../common/PreemptingClassLoader.java
  33  * @run main/othervm Test
  34  */
  35 
  36 public class Test {
  37 
  38     // Break expected error messages into 3 parts since the loader name includes its identity
  39     // hash which is unique and can't be compared against.
  40     static String expectedErrorMessage1_part1 = "loader constraint violation for class test.Task: when " +
  41                                                 "selecting overriding method 'test.Foo test.Task.m()' the " +
  42                                                 "class loader PreemptingClassLoader @";
  43     static String expectedErrorMessage1_part2 = " of the selected method's type test.Task, and the class " +
  44                                                 "loader 'app' for its super type test.J have different Class objects " +
  45                                                 "for the type test.Foo used in the signature (test.Task is in unnamed " +
  46                                                 "module of loader PreemptingClassLoader @";
  47     static String expectedErrorMessage1_part3 = ", parent loader 'app'; test.J is in unnamed module of loader 'app')";
  48 
  49     static String expectedErrorMessage2_part1 = "loader constraint violation for class test.Task: when " +
  50                                                 "selecting overriding method 'test.Foo test.Task.m()' the " +
  51                                                 "class loader 'VtableLdrCnstrnt_Test_Loader' @";
  52     static String expectedErrorMessage2_part2 = " of the selected method's type test.Task, and the class " +
  53                                                 "loader 'app' for its super type test.J have different Class objects " +
  54                                                 "for the type test.Foo used in the signature (test.Task is in unnamed " +
  55                                                 "module of loader 'VtableLdrCnstrnt_Test_Loader' @";
  56     static String expectedErrorMessage2_part3 = ", parent loader 'app'; test.J is in unnamed module of loader 'app')";
  57 
  58     // Test that the error message is correct when a loader constraint error is
  59     // detected during vtable creation.
  60     //
  61     // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
  62     // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
  63     // are different.  So, a LinkageError exception should be thrown because the
  64     // loader constraint check will fail.
  65     public static void test(String loaderName,
  66                             String expectedErrorMessage_part1,
  67                             String expectedErrorMessage_part2,
  68                             String expectedErrorMessage_part3) throws Exception {
  69         Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
  70         String[] classNames = {"test.Task", "test.Foo", "test.I"};




  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8186092 8199852
  27  * @compile ../common/Foo.java
  28  *          ../common/J.java
  29  *          I.java
  30  *          ../common/C.jasm
  31  *          Task.java
  32  *          ../common/PreemptingClassLoader.java
  33  * @run main/othervm Test
  34  */
  35 
  36 public class Test {
  37 
  38     // Break expected error messages into 3 parts since the loader name includes its identity
  39     // hash which is unique and can't be compared against.
  40     static String expectedErrorMessage1_part1 = "loader constraint violation for class test.Task: when " +
  41                                                 "selecting overriding method test.Task.m()Ltest/Foo; the " +
  42                                                 "class loader PreemptingClassLoader @";
  43     static String expectedErrorMessage1_part2 = " of the selected method's type test.Task, and the class " +
  44                                                 "loader 'app' for its super type test.J have different Class objects " +
  45                                                 "for the type test.Foo used in the signature (test.Task is in unnamed " +
  46                                                 "module of loader PreemptingClassLoader @";
  47     static String expectedErrorMessage1_part3 = ", parent loader 'app'; test.J is in unnamed module of loader 'app')";
  48 
  49     static String expectedErrorMessage2_part1 = "loader constraint violation for class test.Task: when " +
  50                                                 "selecting overriding method test.Task.m()Ltest/Foo; the " +
  51                                                 "class loader 'VtableLdrCnstrnt_Test_Loader' @";
  52     static String expectedErrorMessage2_part2 = " of the selected method's type test.Task, and the class " +
  53                                                 "loader 'app' for its super type test.J have different Class objects " +
  54                                                 "for the type test.Foo used in the signature (test.Task is in unnamed " +
  55                                                 "module of loader 'VtableLdrCnstrnt_Test_Loader' @";
  56     static String expectedErrorMessage2_part3 = ", parent loader 'app'; test.J is in unnamed module of loader 'app')";
  57 
  58     // Test that the error message is correct when a loader constraint error is
  59     // detected during vtable creation.
  60     //
  61     // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
  62     // overrides "J.m()LFoo;".  But, Task's class Foo and super type J's class Foo
  63     // are different.  So, a LinkageError exception should be thrown because the
  64     // loader constraint check will fail.
  65     public static void test(String loaderName,
  66                             String expectedErrorMessage_part1,
  67                             String expectedErrorMessage_part2,
  68                             String expectedErrorMessage_part3) throws Exception {
  69         Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
  70         String[] classNames = {"test.Task", "test.Foo", "test.I"};


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