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/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8003639
* @summary defaultMethod resolution and verification
* @run main DefaultMethodRegressionTests
*/
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* This set of classes/interfaces (K/I/C) is specially designed to expose a
* bug in the JVM where it did not find some overloaded methods in some
* specific situations. (fixed by hotspot changeset ffb9316fd9ed).
*/
interface K {
int bbb(Long l);
}
interface I extends K {
default void aaa() {}
default void aab() {}
default void aac() {}
default int bbb(Integer i) { return 22; }
default int bbb(Float f) { return 33; }
default int bbb(Long l) { return 44; }
default int bbb(Double d) { return 55; }
default int bbb(String s) { return 66; }
default void caa() {}
default void cab() {}
default void cac() {}
}
class C implements I {}
public class DefaultMethodRegressionTests {
public static void main(String... args) {
new DefaultMethodRegressionTests().run(args);
}
void run(String... args) {
testLostOverloadedMethod();
System.out.println("testLostOverloadedMethod: OK");
testInferenceVerifier();
System.out.println("testInferenceVerifier: OK");
}
void testLostOverloadedMethod() {
C c = new C();
assertEquals(c.bbb(new Integer(1)), 22);
assertEquals(c.bbb(new Float(1.1)), 33);
assertEquals(c.bbb(new Long(1L)), 44);
assertEquals(c.bbb(new Double(0.01)), 55);
assertEquals(c.bbb(new String("")), 66);
}
// Test to ensure that the inference verifier accepts older classfiles
// with classes that implement interfaces with defaults.
void testInferenceVerifier() {
// interface I { int m() default { return 99; } }
byte I_bytes[] = {
(byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x34,
0x00, 0x08, 0x07, 0x00, 0x06, 0x07, 0x00, 0x07,
0x01, 0x00, 0x03, 0x66, 0x6f, 0x6f, 0x01, 0x00,
0x03, 0x28, 0x29, 0x49, 0x01, 0x00, 0x04, 0x43,
0x6f, 0x64, 0x65, 0x01, 0x00, 0x01, 0x49, 0x01,
0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
0x63, 0x74, 0x06, 0x00, 0x00, 0x01, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x01,
0x00, 0x03, 0x00, 0x04, 0x00, 0x01, 0x00, 0x05,
0x00, 0x00, 0x00, 0x0f, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x03, 0x10, 0x63, (byte)0xac, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00
};
// public class C implements I {} /* -target 1.5 */
byte C_bytes[] = {
(byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe, 0x00, 0x00, 0x00, 0x31,
0x00, 0x0c, 0x0a, 0x00, 0x03, 0x00, 0x08, 0x07,
0x00, 0x09, 0x07, 0x00, 0x0a, 0x07, 0x00, 0x0b,
0x01, 0x00, 0x06, 0x3c, 0x69, 0x6e, 0x69, 0x74,
0x3e, 0x01, 0x00, 0x03, 0x28, 0x29, 0x56, 0x01,
0x00, 0x04, 0x43, 0x6f, 0x64, 0x65, 0x0c, 0x00,
0x05, 0x00, 0x06, 0x01, 0x00, 0x01, 0x43, 0x01,
0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c,
0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65,
0x63, 0x74, 0x01, 0x00, 0x01, 0x49, 0x00, 0x21,
0x00, 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x04,
0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x05,
0x00, 0x06, 0x00, 0x01, 0x00, 0x07, 0x00, 0x00,
0x00, 0x11, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00,
0x00, 0x05, 0x2a, (byte)0xb7, 0x00, 0x01, (byte)0xb1, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00
};
ClassLoader cl = new ClassLoader() {
protected Class<?> findClass(String name) {
if (name.equals("I")) {
return defineClass("I", I_bytes, 0, I_bytes.length);
} else if (name.equals("C")) {
return defineClass("C", C_bytes, 0, C_bytes.length);
} else {
return null;
}
}
};
try {
Class.forName("C", true, cl);
} catch (Exception e) {
// unmodified verifier will throw VerifyError
throw new RuntimeException(e);
}
}
void assertEquals(Object o1, Object o2) {
System.out.print("Expected: " + o1);
System.out.println(", Obtained: " + o2);
if (!o1.equals(o2)) {
throw new RuntimeException("got unexpected values");
}
}
}
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