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 */
27 * @compile ../common/Foo.java
28 * I.java
29 * ../common/J.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 LinkageError exceptions are not thrown during itable creation,
39 // for loader constraint errors, if the target method is an overpass method.
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 J. But, the selected method is an overpass method (that throws an
44 // ICCE). So, no LinkageError exception should be thrown because the loader
45 // constraint check that would cause the LinkageError should not be done.
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(); // Cause an ICCE because both I and J define m()LFoo;
52 throw new RuntimeException("Expected ICCE exception not thrown");
53 } catch (IncompatibleClassChangeError e) {
54 if (!e.getMessage().contains("Conflicting default methods: I.m J.m")) {
55 throw new RuntimeException("Wrong ICCE exception thrown: " + e.getMessage());
56 }
57 }
58 }
59 }
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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 */
27 * @compile ../common/Foo.java
28 * I.java
29 * ../common/J.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 LinkageError exceptions are not thrown during itable creation,
39 // for loader constraint errors, if the target method is an overpass method.
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 J. But, the selected method is an overpass method (that throws an
44 // ICCE). So, no LinkageError exception should be thrown because the loader
45 // constraint check that would cause the LinkageError should not be done.
46 public static void main(String... args) throws Exception {
47 Class<?> c = test.Foo.class; // forces standard class loader to load Foo
48 ClassLoader l = new PreemptingClassLoader("test.Task", "test.Foo", "test.C", "test.I");
49 Runnable r = (Runnable) l.loadClass("test.Task").newInstance();
50 try {
51 r.run(); // Cause an ICCE because both I and J define m()LFoo;
52 throw new RuntimeException("Expected ICCE exception not thrown");
53 } catch (IncompatibleClassChangeError e) {
54 if (!e.getMessage().contains("Conflicting default methods: test/I.m test/J.m")) {
55 throw new RuntimeException("Wrong ICCE exception thrown: " + e.getMessage());
56 }
57 }
58 }
59 }
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