001/*
002 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.test;
024
025import java.lang.reflect.*;
026
027import jdk.internal.jvmci.hotspot.*;
028import jdk.internal.jvmci.meta.*;
029
030import org.junit.*;
031
032/**
033 * Tests {@link HotSpotResolvedJavaField} functionality.
034 */
035public class HotSpotResolvedJavaFieldTest extends HotSpotGraalCompilerTest {
036
037    private static final Class<?>[] classesWithInternalFields = {Class.class, ClassLoader.class};
038
039    /**
040     * Tests that {@link HotSpotResolvedJavaField#getModifiers()} only includes the modifiers
041     * returned by {@link Field#getModifiers()}. Namely, it must not include
042     * {@code HotSpotResolvedJavaField#FIELD_INTERNAL_FLAG}.
043     */
044    @Test
045    public void testModifiersForInternal() {
046        for (Class<?> c : classesWithInternalFields) {
047            HotSpotResolvedObjectType type = HotSpotResolvedObjectTypeImpl.fromObjectClass(c);
048            for (ResolvedJavaField field : type.getInstanceFields(false)) {
049                if (field.isInternal()) {
050                    Assert.assertEquals(0, ~ModifiersProvider.jvmFieldModifiers() & field.getModifiers());
051                }
052            }
053        }
054    }
055
056    /**
057     * Tests that {@link HotSpotResolvedObjectTypeImpl#createField(String, JavaType, long, int)}
058     * always returns the same object for an internal field.
059     */
060    @Test
061    public void testCachingForInternalFields() {
062        for (Class<?> c : classesWithInternalFields) {
063            HotSpotResolvedObjectType type = HotSpotResolvedObjectTypeImpl.fromObjectClass(c);
064            for (ResolvedJavaField field : type.getInstanceFields(false)) {
065                if (field.isInternal()) {
066                    HotSpotResolvedJavaField expected = (HotSpotResolvedJavaField) field;
067                    ResolvedJavaField actual = type.createField(expected.getName(), expected.getType(), expected.offset(), expected.getModifiers());
068                    Assert.assertEquals(expected, actual);
069                }
070            }
071        }
072    }
073
074    @Test
075    public void testIsInObject() {
076        for (Field f : String.class.getDeclaredFields()) {
077            HotSpotResolvedJavaField rf = (HotSpotResolvedJavaField) getMetaAccess().lookupJavaField(f);
078            Assert.assertEquals(rf.toString(), rf.isInObject("a string"), !rf.isStatic());
079        }
080    }
081}