1/*
2 * Copyright (c) 2015, 2016, 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 8136421
27 * @requires vm.jvmci
28 * @library / /test/lib/
29 * @library ../common/patches
30 * @modules java.base/jdk.internal.misc
31 * @modules jdk.internal.vm.ci/jdk.vm.ci.hotspot
32 * @build jdk.internal.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper
33 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
34 *                   -Djvmci.Compiler=null
35 *                   compiler.jvmci.compilerToVM.GetImplementorTest
36 */
37
38package compiler.jvmci.compilerToVM;
39
40import compiler.jvmci.common.testcases.AbstractClass;
41import compiler.jvmci.common.testcases.AbstractClassExtender;
42import compiler.jvmci.common.testcases.DoNotExtendClass;
43import compiler.jvmci.common.testcases.DoNotImplementInterface;
44import compiler.jvmci.common.testcases.MultipleImplementer1;
45import compiler.jvmci.common.testcases.MultipleImplementer2;
46import compiler.jvmci.common.testcases.MultipleImplementersInterface;
47import compiler.jvmci.common.testcases.SingleImplementer;
48import compiler.jvmci.common.testcases.SingleImplementerInterface;
49import compiler.jvmci.common.testcases.SingleSubclass;
50import compiler.jvmci.common.testcases.SingleSubclassedClass;
51import jdk.test.lib.Asserts;
52import jdk.test.lib.Utils;
53import jdk.vm.ci.hotspot.CompilerToVMHelper;
54import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;
55
56import java.util.HashSet;
57import java.util.Set;
58import java.util.stream.Stream;
59
60public class GetImplementorTest {
61    public static void main(String args[]) {
62        GetImplementorTest test = new GetImplementorTest();
63        for (TestCase tcase : createTestCases()) {
64            test.runTest(tcase);
65        }
66    }
67
68    private static Set<TestCase> createTestCases() {
69        Set<TestCase> result = new HashSet<>();
70        Stream.of(
71                    SingleSubclass.class,
72                    AbstractClassExtender.class,
73                    MultipleImplementer2.class,
74                    MultipleImplementer1.class,
75                    MultipleImplementersInterface.class,
76                    DoNotImplementInterface.class,
77                    DoNotExtendClass.class,
78                    AbstractClass.class,
79                    SingleSubclassedClass.class)
80                .forEach(Utils::ensureClassIsLoaded);
81        // an interface with single class implementing it
82        result.add(new TestCase(SingleImplementerInterface.class,
83                SingleImplementer.class));
84        /* an interface with multiple implementers. According to getImplementor
85           javadoc, an itself should be returned in case of more than one
86           implementor
87         */
88        result.add(new TestCase(MultipleImplementersInterface.class,
89                MultipleImplementersInterface.class));
90        // an interface with no implementors
91        result.add(new TestCase(DoNotImplementInterface.class, null));
92        // an abstract class with extender class
93        result.add(new TestCase(AbstractClass.class, null));
94        // a simple class, which is not extended
95        result.add(new TestCase(DoNotExtendClass.class, null));
96        // a usual class, which is extended
97        result.add(new TestCase(SingleSubclassedClass.class, null));
98        return result;
99    }
100
101    private void runTest(TestCase tcase) {
102        System.out.println(tcase);
103        HotSpotResolvedObjectType resolvedIface = CompilerToVMHelper
104                .lookupTypeHelper(Utils.toJVMTypeSignature(tcase.anInterface),
105                        getClass(), /* resolve = */ true);
106        HotSpotResolvedObjectType resolvedImplementer = CompilerToVMHelper
107                .getImplementor(resolvedIface);
108        HotSpotResolvedObjectType resolvedExpected = null;
109        if (tcase.expectedImplementer != null) {
110            resolvedExpected = CompilerToVMHelper.lookupTypeHelper(Utils
111                    .toJVMTypeSignature(tcase.expectedImplementer),
112                    getClass(), /* resolve = */ true);
113        }
114        Asserts.assertEQ(resolvedImplementer, resolvedExpected,
115                "Unexpected implementer for " + tcase.anInterface.getName());
116    }
117
118    private static class TestCase {
119        public final Class<?> anInterface;
120        public final Class<?> expectedImplementer;
121
122        public TestCase(Class<?> iface, Class<?> expectedImplementer) {
123            this.anInterface = iface;
124            this.expectedImplementer = expectedImplementer;
125        }
126
127        @Override
128        public String toString() {
129            return String.format("CASE: interface=%s, expected=%s",
130                    anInterface.getName(),
131                    expectedImplementer == null
132                            ? null
133                            : expectedImplementer.getName());
134        }
135    }
136}
137