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

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  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
  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     static String expectedErrorMessage1 =


  39         "loader constraint violation in interface itable initialization for class test.C: " +
  40         "when selecting method test.I.m()Ltest/Foo; " +
  41         "the class loader \"<unnamed>\" (instance of PreemptingClassLoader, " +
  42         "child of \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  43         "for super interface test.I, and the class loader \"app\" " +


  44         "(instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  45         "of the selected method's type, test.J have different Class objects " +
  46         "for the type test.Foo used in the signature";
  47 
  48     static String expectedErrorMessage2 =
  49         "loader constraint violation in interface itable initialization for class test.C: " +
  50         "when selecting method test.I.m()Ltest/Foo; " +
  51         "the class loader \"ItableLdrCnstrnt_Test_Loader\" (instance of PreemptingClassLoader, " +
  52         "child of \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  53         "for super interface test.I, and the class loader \"app\" " +


  54         "(instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  55         "of the selected method's type, test.J have different Class objects " +
  56         "for the type test.Foo used in the signature";
  57 
  58     // Test that the error message is correct when a loader constraint error is
  59     // detected during itable creation.
  60     //
  61     // In this test, during itable creation for class C, method "m()LFoo;" for
  62     // C's super interface I has a different class Foo than the selected method's
  63     // type super interface J.  The selected method is not an overpass method nor
  64     // otherwise excluded from loader constraint checking.  So, a LinkageError
  65     // exception should be thrown because the loader constraint check will fail.
  66     public static void test(String loaderName, String expectedErrorMessage) throws Exception {


  67         Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
  68         String[] classNames = {"test.Task", "test.Foo", "test.C", "test.I"};
  69         ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
  70         Runnable r = (Runnable) l.loadClass("test.Task").newInstance();
  71         try {
  72             r.run();
  73             throw new RuntimeException("Expected LinkageError exception not thrown");
  74         } catch (LinkageError e) {
  75             String errorMsg = e.getMessage();
  76             if (!errorMsg.equals(expectedErrorMessage)) {
  77                 System.out.println("Expected: " + expectedErrorMessage + "\n" +

  78                                    "but got:  " + errorMsg);
  79                 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
  80             }
  81             System.out.println("Passed with message: " + errorMsg);
  82         }
  83     }
  84 
  85     public static void main(String... args) throws Exception {
  86         test(null, expectedErrorMessage1);
  87         test("ItableLdrCnstrnt_Test_Loader", expectedErrorMessage2);
  88     }
  89 }


  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
  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 2 parts since the loader name includes its identity
  39     // hash which is unique and can't be compared against.
  40     static String expectedErrorMessage1_part1 =
  41         "loader constraint violation in interface itable initialization for class test.C: " +
  42         "when selecting method test.I.m()Ltest/Foo; " +
  43         "the class loader PreemptingClassLoader @";
  44     static String expectedErrorMessage1_part2 =
  45         " (instance of PreemptingClassLoader, " +
  46         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  47         "for super interface test.I, and the class loader 'app' " +
  48         "(instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  49         "of the selected method's type, test.J have different Class objects " +
  50         "for the type test.Foo used in the signature";
  51 
  52     static String expectedErrorMessage2_part1 =
  53         "loader constraint violation in interface itable initialization for class test.C: " +
  54         "when selecting method test.I.m()Ltest/Foo; " +
  55         "the class loader 'ItableLdrCnstrnt_Test_Loader' @";
  56     static String expectedErrorMessage2_part2 =
  57         " (instance of PreemptingClassLoader, " +
  58         "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  59         "for super interface test.I, and the class loader 'app' " +
  60         "(instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
  61         "of the selected method's type, test.J have different Class objects " +
  62         "for the type test.Foo used in the signature";
  63 
  64     // Test that the error message is correct when a loader constraint error is
  65     // detected during itable creation.
  66     //
  67     // In this test, during itable creation for class C, method "m()LFoo;" for
  68     // C's super interface I has a different class Foo than the selected method's
  69     // type super interface J.  The selected method is not an overpass method nor
  70     // otherwise excluded from loader constraint checking.  So, a LinkageError
  71     // exception should be thrown because the loader constraint check will fail.
  72     public static void test(String loaderName,
  73                             String expectedErrorMessage_part1,
  74                             String expectedErrorMessage_part2) throws Exception {
  75         Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
  76         String[] classNames = {"test.Task", "test.Foo", "test.C", "test.I"};
  77         ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
  78         Runnable r = (Runnable) l.loadClass("test.Task").newInstance();
  79         try {
  80             r.run();
  81             throw new RuntimeException("Expected LinkageError exception not thrown");
  82         } catch (LinkageError e) {
  83             String errorMsg = e.getMessage();
  84             if (!errorMsg.contains(expectedErrorMessage_part1) || 
  85                 !errorMsg.contains(expectedErrorMessage_part2)) {
  86                 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
  87                                    "but got:  " + errorMsg);
  88                 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
  89             }
  90             System.out.println("Passed with message: " + errorMsg);
  91         }
  92     }
  93 
  94     public static void main(String... args) throws Exception {
  95         test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2);
  96         test("ItableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2);
  97     }
  98 }
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