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 for class test.Task: " +
40 "when selecting overriding method test.Task.m()Ltest/Foo; " +
41 "the class loader \"<unnamed>\" (instance of PreemptingClassLoader, " +
42 "child of \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
43 "of the selected method's type test.Task, " +
44 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
45 "for its super type test.J " +
46 "have different Class objects for the type test.Foo used in the signature";
47
48 static String expectedErrorMessage2 =
49 "loader constraint violation for class test.Task: " +
50 "when selecting overriding method test.Task.m()Ltest/Foo; " +
51 "the class loader \"VtableLdrCnstrnt_Test_Loader\" (instance of PreemptingClassLoader, " +
52 "child of \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) " +
53 "of the selected method's type test.Task, " +
54 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
55 "for its super type test.J " +
56 "have different Class objects 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 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, String expectedErrorMessage) throws Exception {
66 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
67 String[] classNames = {"test.Task", "test.Foo", "test.I"};
68 ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
69 l.loadClass("test.Foo");
70 try {
71 l.loadClass("test.Task").newInstance();
72 throw new RuntimeException("Expected LinkageError exception not thrown");
73 } catch (LinkageError e) {
74 String errorMsg = e.getMessage();
75 if (!errorMsg.equals(expectedErrorMessage)) {
76 System.out.println("Expected: " + expectedErrorMessage + "\n" +
77 "but got: " + errorMsg);
78 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
79 }
80 System.out.println("Passed with message: " + errorMsg);
81 }
82 }
83
84 public static void main(String args[]) throws Exception {
85 test(null, expectedErrorMessage1);
86 test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2);
87 }
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 for class test.Task: " +
42 "when selecting overriding method test.Task.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$AppClassLoader) " +
47 "of the selected method's type test.Task, " +
48 "and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
49 "for its super type test.J " +
50 "have different Class objects for the type test.Foo used in the signature";
51
52 static String expectedErrorMessage2_part1 =
53 "loader constraint violation for class test.Task: " +
54 "when selecting overriding method test.Task.m()Ltest/Foo; " +
55 "the class loader 'VtableLdrCnstrnt_Test_Loader' @";
56 static String expectedErrorMessage2_part2 =
57 " (instance of PreemptingClassLoader, " +
58 "child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) " +
59 "of the selected method's type test.Task, " +
60 "and the class loader 'app' (instance of jdk.internal.loader.ClassLoaders$AppClassLoader) " +
61 "for its super type test.J " +
62 "have different Class objects 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 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,
72 String expectedErrorMessage_part1,
73 String expectedErrorMessage_part2) throws Exception {
74 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
75 String[] classNames = {"test.Task", "test.Foo", "test.I"};
76 ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
77 l.loadClass("test.Foo");
78 try {
79 l.loadClass("test.Task").newInstance();
80 throw new RuntimeException("Expected LinkageError exception not thrown");
81 } catch (LinkageError e) {
82 String errorMsg = e.getMessage();
83 if (!errorMsg.contains(expectedErrorMessage_part1) ||
84 !errorMsg.contains(expectedErrorMessage_part2)) {
85 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
86 "but got: " + errorMsg);
87 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
88 }
89 System.out.println("Passed with message: " + errorMsg);
90 }
91 }
92
93 public static void main(String args[]) throws Exception {
94 test(null, expectedErrorMessage1_part1, expectedErrorMessage1_part2);
95 test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1, expectedErrorMessage2_part2);
96 }
97 }
98
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