1 /*
2 * Copyright (c) 2012, 2014, 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.replacements;
24
25 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
26 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.ARRAY_KLASS_COMPONENT_MIRROR;
27 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_ACCESS_FLAGS_LOCATION;
28 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_MODIFIER_FLAGS_LOCATION;
29 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.KLASS_SUPER_KLASS_LOCATION;
30 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayKlassComponentMirrorOffset;
31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassAccessFlagsOffset;
32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassIsArray;
33 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassModifierFlagsOffset;
34 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.klassSuperKlassOffset;
35
36 import java.lang.reflect.Modifier;
37
38 import org.graalvm.compiler.api.replacements.ClassSubstitution;
39 import org.graalvm.compiler.api.replacements.MethodSubstitution;
40 import org.graalvm.compiler.hotspot.word.KlassPointer;
41 import org.graalvm.compiler.nodes.PiNode;
42
43 // JaCoCo Exclude
44
45 /**
46 * Substitutions for {@link java.lang.Class} methods.
47 */
48 @ClassSubstitution(Class.class)
49 public class HotSpotClassSubstitutions {
50
51 @MethodSubstitution(isStatic = false)
52 public static int getModifiers(final Class<?> thisObj) {
53 KlassPointer klass = ClassGetHubNode.readClass(thisObj);
54 if (klass.isNull()) {
55 // Class for primitive type
56 return Modifier.ABSTRACT | Modifier.FINAL | Modifier.PUBLIC;
57 } else {
58 return klass.readInt(klassModifierFlagsOffset(INJECTED_VMCONFIG), KLASS_MODIFIER_FLAGS_LOCATION);
59 }
60 }
61
62 @MethodSubstitution(isStatic = false)
63 public static boolean isInterface(final Class<?> thisObj) {
64 KlassPointer klass = ClassGetHubNode.readClass(thisObj);
65 if (klass.isNull()) {
66 // Class for primitive type
67 return false;
68 } else {
69 int accessFlags = klass.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION);
70 return (accessFlags & Modifier.INTERFACE) != 0;
71 }
72 }
73
74 @MethodSubstitution(isStatic = false)
75 public static boolean isArray(final Class<?> thisObj) {
76 KlassPointer klass = ClassGetHubNode.readClass(thisObj);
77 if (klass.isNull()) {
78 // Class for primitive type
79 return false;
80 } else {
81 return klassIsArray(klass);
82 }
83 }
84
85 @MethodSubstitution(isStatic = false)
86 public static boolean isPrimitive(final Class<?> thisObj) {
87 KlassPointer klass = ClassGetHubNode.readClass(thisObj);
88 return klass.isNull();
89 }
90
91 @MethodSubstitution(isStatic = false)
92 public static Class<?> getSuperclass(final Class<?> thisObj) {
93 KlassPointer klass = ClassGetHubNode.readClass(thisObj);
94 if (!klass.isNull()) {
95 int accessFlags = klass.readInt(klassAccessFlagsOffset(INJECTED_VMCONFIG), KLASS_ACCESS_FLAGS_LOCATION);
96 if ((accessFlags & Modifier.INTERFACE) == 0) {
97 if (klassIsArray(klass)) {
98 return Object.class;
99 } else {
100 KlassPointer superKlass = klass.readKlassPointer(klassSuperKlassOffset(INJECTED_VMCONFIG), KLASS_SUPER_KLASS_LOCATION);
101 if (superKlass.isNull()) {
102 return null;
103 } else {
104 return readJavaMirror(superKlass);
105 }
106 }
107 }
108 } else {
109 // Class for primitive type
110 }
111 return null;
112 }
113
114 public static Class<?> readJavaMirror(KlassPointer klass) {
115 return PiNode.asNonNullClass(HubGetClassNode.readClass(klass));
116 }
117
118 @MethodSubstitution(isStatic = false)
119 public static Class<?> getComponentType(final Class<?> thisObj) {
120 KlassPointer klass = ClassGetHubNode.readClass(thisObj);
121 if (!klass.isNull()) {
122 if (klassIsArray(klass)) {
123 return PiNode.asNonNullClass(klass.readObject(arrayKlassComponentMirrorOffset(INJECTED_VMCONFIG), ARRAY_KLASS_COMPONENT_MIRROR));
124 }
125 } else {
126 // Class for primitive type
127 }
128 return null;
129 }
130 }