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 */
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 static String expectedErrorMessage1 =
39 "loader constraint violation for class test.Task: when selecting overriding method test.Task.m()Ltest/Foo; " +
40 "the class loader instance of PreemptingClassLoader " +
41 "(parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) of the selected method's type test.Task, " +
42 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " +
43 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader) for its super type test.J " +
44 "have different Class objects for the type test.Foo used in the signature";
45
46 // Test that the error message is correct when a loader constraint error is
47 // detected during vtable creation.
48 //
49 // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
50 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo
51 // are different. So, a LinkageError exception should be thrown because the
52 // loader constraint check will fail.
53 public static void test1() throws Exception {
54 Class<?> c = test.Foo.class; // forces standard class loader to load Foo
55 ClassLoader l = new PreemptingClassLoader("test.Task", "test.Foo", "test.I");
56 l.loadClass("test.Foo");
57 try {
58 l.loadClass("test.Task").newInstance();
59 throw new RuntimeException("Expected LinkageError exception not thrown");
60 } catch (LinkageError e) {
61 String errorMsg = e.getMessage();
62 if (!errorMsg.equals(expectedErrorMessage1)) {
63 System.out.println("Expected: " + expectedErrorMessage1 + "\n" +
64 "but got: " + errorMsg);
65 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
66 }
67 System.out.println("Passed with message: " + errorMsg);
68 }
69 }
70
71 static String expectedErrorMessage2 =
72 "loader constraint violation for class test.Task: when selecting overriding method test.Task.m()Ltest/Foo; " +
73 "the class loader \"VtableLdrCnstrnt_Test_Loader\" (instance of PreemptingClassLoader, " +
74 "parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) of the selected method's type test.Task, " +
75 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " +
76 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader) for its super type test.J " +
77 "have different Class objects for the type test.Foo used in the signature";
78
79 // Same as test1, but ClassLoader has a name.
80 public static void test2() throws Exception {
81 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
82 String[] classNames = {"test.Task", "test.Foo", "test.I"};
83 ClassLoader l = new PreemptingClassLoader("VtableLdrCnstrnt_Test_Loader", classNames);
84 l.loadClass("test.Foo");
85 try {
86 l.loadClass("test.Task").newInstance();
87 throw new RuntimeException("Expected LinkageError exception not thrown");
88 } catch (LinkageError e) {
89 String errorMsg = e.getMessage();
90 if (!errorMsg.equals(expectedErrorMessage2)) {
91 System.out.println("Expected: " + expectedErrorMessage2 + "\n" +
92 "but got: " + errorMsg);
93 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
94 }
95 System.out.println("Passed with message: " + errorMsg);
96 }
97 }
98
99 public static void main(String args[]) throws Exception {
100 test1();
101 test2();
102 }
103 }
104
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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 */
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 static String expectedErrorMessage1 =
39 "loader constraint violation for class test.Task: when selecting overriding method test.Task.m()Ltest/Foo; " +
40 "the class loader instance of PreemptingClassLoader " +
41 "(parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) of the selected method's type test.Task, " +
42 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " +
43 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader) for its super type test.J " +
44 "have different Class objects for the type test.Foo used in the signature";
45
46 static String expectedErrorMessage2 =
47 "loader constraint violation for class test.Task: when selecting overriding method test.Task.m()Ltest/Foo; " +
48 "the class loader \"VtableLdrCnstrnt_Test_Loader\" (instance of PreemptingClassLoader, " +
49 "parent: \"app\" jdk.internal.loader.ClassLoaders$AppClassLoader) of the selected method's type test.Task, " +
50 "and the class loader \"app\" (instance of jdk.internal.loader.ClassLoaders$AppClassLoader, " +
51 "parent: \"platform\" jdk.internal.loader.ClassLoaders$PlatformClassLoader) for its super type test.J " +
52 "have different Class objects for the type test.Foo used in the signature";
53
54 // Test that the error message is correct when a loader constraint error is
55 // detected during vtable creation.
56 //
57 // In this test, during vtable creation for class Task, method "Task.m()LFoo;"
58 // overrides "J.m()LFoo;". But, Task's class Foo and super type J's class Foo
59 // are different. So, a LinkageError exception should be thrown because the
60 // loader constraint check will fail.
61 public static void test(String loaderName, String expectedErrorMessage) throws Exception {
62 Class<?> c = test.Foo.class; // Forces standard class loader to load Foo.
63 String[] classNames = {"test.Task", "test.Foo", "test.I"};
64 ClassLoader l = new PreemptingClassLoader(loaderName, classNames);
65 l.loadClass("test.Foo");
66 try {
67 l.loadClass("test.Task").newInstance();
68 throw new RuntimeException("Expected LinkageError exception not thrown");
69 } catch (LinkageError e) {
70 String errorMsg = e.getMessage();
71 if (!errorMsg.equals(expectedErrorMessage)) {
72 System.out.println("Expected: " + expectedErrorMessage + "\n" +
73 "but got: " + errorMsg);
74 throw new RuntimeException("Wrong LinkageError exception thrown: " + errorMsg);
75 }
76 System.out.println("Passed with message: " + errorMsg);
77 }
78 }
79
80 public static void main(String args[]) throws Exception {
81 test(null, expectedErrorMessage1);
82 test("VtableLdrCnstrnt_Test_Loader", expectedErrorMessage2);
83 }
84 }
85
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