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 itable creation.
40 //
41 // In this test, during itable creation for class C, method "m()LFoo;" for
42 // C's super interface I has a different class Foo than the selected method's
43 // type super interface J. The selected method is not an overpass method nor
44 // otherwise excluded from loader constraint checking. So, a LinkageError
45 // exception should be thrown because the loader constraint check will fail.
46 public static void main(String... args) throws Exception {
47 Class<?> c = Foo.class; // forces standard class loader to load Foo
48 ClassLoader l = new PreemptingClassLoader("Task", "Foo", "C", "I");
49 Runnable r = (Runnable) l.loadClass("Task").newInstance();
50 try {
51 r.run();
52 throw new RuntimeException("Expected LinkageError exception not thrown");
53 } catch (LinkageError e) {
54 if (!e.getMessage().contains(
55 "loader constraint violation in interface itable initialization for class C:")) {
56 throw new RuntimeException("Wrong LinkageError exception thrown: " + e.getMessage());
57 }
58 }
59 }
60 }
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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 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 }
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