1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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
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 // Test that the error message is correct when a loader constraint error is
39 // detected during vtable creation.
40 //
41 // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
42 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo
43 // are different. So, a LinkageError exception should be thrown because the
44 // loader constraint check will fail.
45 public static void main(String args[]) throws Exception {
46 Class<?> c = Foo.class; // forces standard class loader to load Foo
47 ClassLoader l = new PreemptingClassLoader("Task", "Foo", "I");
48 l.loadClass("Foo");
49 try {
50 l.loadClass("Task").newInstance();
51 throw new RuntimeException("Expected LinkageError exception not thrown");
52 } catch (LinkageError e) {
53 if (!e.getMessage().contains(
54 "loader constraint violation for class Task: when selecting overriding method") ||
55 !e.getMessage().contains(
56 "for its super type J have different Class objects for the type Foo")) {
57 throw new RuntimeException("Wrong LinkageError exception thrown: " + e.getMessage());
58 }
59 }
60 }
61
62 }
63
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1 /*
2 * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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
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