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 // 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"};
71 ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
72 l.loadClass("test.Foo");
73 try {
74 l.loadClass("test.Task").newInstance();
75 throw new RuntimeException("Expected LinkageError exception not thrown");
76 } catch (LinkageError e) {
77 String errorMsg = e.getMessage();
78 if (!errorMsg.contains(expectedErrorMessage_part1) ||
79 !errorMsg.contains(expectedErrorMessage_part2) ||
80 !errorMsg.contains(expectedErrorMessage_part3)) {
81 System.out.println("Expected: " + expectedErrorMessage_part1 + "<id>" + expectedErrorMessage_part2 + "\n" +
82 "but got: " + errorMsg);
83 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
84 }
85 System.out.println("Passed with message: " + errorMsg);
86 }
87 }
88
89 public static void main(String args[]) throws Exception {
90 test(null, expectedErrorMessage1_part1,
91 expectedErrorMessage1_part2, expectedErrorMessage1_part3);
92 test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2_part1,
93 expectedErrorMessage2_part2, expectedErrorMessage2_part3);
94 }
95 }