1 /* 2 * Copyright (c) 2013, 2015, 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 package org.graalvm.compiler.hotspot.test; 24 25 import static java.lang.reflect.Modifier.FINAL; 26 import static java.lang.reflect.Modifier.PRIVATE; 27 import static java.lang.reflect.Modifier.PROTECTED; 28 import static java.lang.reflect.Modifier.PUBLIC; 29 import static java.lang.reflect.Modifier.STATIC; 30 import static java.lang.reflect.Modifier.TRANSIENT; 31 import static java.lang.reflect.Modifier.VOLATILE; 32 33 import java.lang.reflect.Field; 34 import java.lang.reflect.InvocationTargetException; 35 import java.lang.reflect.Method; 36 37 import org.junit.Assert; 38 import org.junit.Test; 39 40 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; 41 42 import jdk.vm.ci.hotspot.HotSpotResolvedJavaField; 43 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; 44 import jdk.vm.ci.meta.JavaType; 45 import jdk.vm.ci.meta.ResolvedJavaField; 46 47 /** 48 * Tests {@link HotSpotResolvedJavaField} functionality. 49 */ 50 public class HotSpotResolvedJavaFieldTest extends HotSpotGraalCompilerTest { 51 52 private static final Class<?>[] classesWithInternalFields = {Class.class, ClassLoader.class}; 53 54 private static final Method createFieldMethod; 55 56 static { 57 Method ret = null; 58 try { 59 Class<?> typeImpl = Class.forName("jdk.vm.ci.hotspot.HotSpotResolvedObjectTypeImpl"); 60 ret = typeImpl.getDeclaredMethod("createField", String.class, JavaType.class, long.class, int.class); 61 ret.setAccessible(true); 62 } catch (ClassNotFoundException | NoSuchMethodException | SecurityException e) { 63 e.printStackTrace(); 64 } 65 66 createFieldMethod = ret; 67 } 68 69 /** 70 * Same as {@code HotSpotModifiers.jvmFieldModifiers()} but works when using a JVMCI version 71 * prior to the introduction of that method. 72 */ 73 private int jvmFieldModifiers() { 74 GraalHotSpotVMConfig config = runtime().getVMConfig(); 75 int accEnum = config.getConstant("JVM_ACC_ENUM", Integer.class, 0x4000); 76 int accSynthetic = config.getConstant("JVM_ACC_SYNTHETIC", Integer.class, 0x1000); 77 return PUBLIC | PRIVATE | PROTECTED | STATIC | FINAL | VOLATILE | TRANSIENT | accEnum | accSynthetic; 78 } 79 80 /** 81 * Tests that {@link HotSpotResolvedJavaField#getModifiers()} only includes the modifiers 82 * returned by {@link Field#getModifiers()}. Namely, it must not include 83 * {@code HotSpotResolvedJavaField#FIELD_INTERNAL_FLAG}. 84 */ 85 @Test 86 public void testModifiersForInternal() { 87 for (Class<?> c : classesWithInternalFields) { 88 HotSpotResolvedObjectType type = HotSpotResolvedObjectType.fromObjectClass(c); 89 for (ResolvedJavaField field : type.getInstanceFields(false)) { 90 if (field.isInternal()) { 91 Assert.assertEquals(0, ~jvmFieldModifiers() & field.getModifiers()); 92 } 93 } 94 } 95 } 96 97 /** 98 * Tests that {@code HotSpotResolvedObjectType#createField(String, JavaType, long, int)} always 99 * returns the same object for an internal field. 100 * 101 * @throws InvocationTargetException 102 * @throws IllegalArgumentException 103 * @throws IllegalAccessException 104 */ 105 @Test 106 public void testCachingForInternalFields() throws IllegalAccessException, IllegalArgumentException, InvocationTargetException { 107 Assert.assertTrue("HotSpotResolvedObjectTypeImpl.createField method not found", createFieldMethod != null); 108 for (Class<?> c : classesWithInternalFields) { 109 HotSpotResolvedObjectType type = HotSpotResolvedObjectType.fromObjectClass(c); 110 for (ResolvedJavaField field : type.getInstanceFields(false)) { 111 if (field.isInternal()) { 112 HotSpotResolvedJavaField expected = (HotSpotResolvedJavaField) field; 113 ResolvedJavaField actual = (ResolvedJavaField) createFieldMethod.invoke(type, expected.getName(), expected.getType(), expected.offset(), expected.getModifiers()); 114 Assert.assertEquals(expected, actual); 115 } 116 } 117 } 118 } 119 120 @Test 121 public void testIsInObject() { 122 for (Field f : String.class.getDeclaredFields()) { 123 HotSpotResolvedJavaField rf = (HotSpotResolvedJavaField) getMetaAccess().lookupJavaField(f); 124 Assert.assertEquals(rf.toString(), rf.isInObject("a string"), !rf.isStatic()); 125 } 126 } 127 }