1 /*
2 * Copyright (c) 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 package jdk.vm.ci.hotspot.test;
25
26 import java.lang.reflect.Field;
27
28 import org.testng.annotations.DataProvider;
29
30 import sun.hotspot.WhiteBox;
31 import jdk.internal.misc.Unsafe;
32 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
33 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider;
34 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;
35 import jdk.vm.ci.hotspot.HotSpotVMConfigAccess;
36 import jdk.vm.ci.meta.Constant;
37 import jdk.vm.ci.meta.JavaConstant;
38 import jdk.vm.ci.meta.JavaKind;
39 import jdk.vm.ci.runtime.JVMCI;
40 import java.util.List;
41 import java.util.ArrayList;
42 import java.util.Map;
43 import java.util.HashMap;
44
45 public class MemoryAccessProviderData {
46 private static final Unsafe UNSAFE = Unsafe.getUnsafe();
47 private static final HotSpotConstantReflectionProvider CONSTANT_REFLECTION = (HotSpotConstantReflectionProvider) JVMCI.getRuntime().getHostJVMCIBackend().getConstantReflection();
48 private static final TestClass TEST_OBJECT = new TestClass();
49 private static final JavaConstant TEST_CONSTANT = CONSTANT_REFLECTION.forObject(TEST_OBJECT);
50 private static final JavaConstant TEST_CLASS_CONSTANT = CONSTANT_REFLECTION.forObject(TestClass.class);
51 private static KindData[] PRIMITIVE_KIND_DATA = {
52 new KindData(JavaKind.Boolean, TEST_OBJECT),
53 new KindData(JavaKind.Byte, TEST_OBJECT),
54 new KindData(JavaKind.Char, TEST_OBJECT),
55 new KindData(JavaKind.Short, TEST_OBJECT),
56 new KindData(JavaKind.Int, TEST_OBJECT),
57 new KindData(JavaKind.Float, TEST_OBJECT),
58 new KindData(JavaKind.Long, TEST_OBJECT),
59 new KindData(JavaKind.Double, TEST_OBJECT)
60 };
61 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
62
63
64 @DataProvider(name = "positiveObject")
65 public static Object[][] getPositiveObjectJavaKind() {
66 HotSpotJVMCIRuntimeProvider runtime = (HotSpotJVMCIRuntimeProvider) JVMCI.getRuntime();
67 int offset = new HotSpotVMConfigAccess(runtime.getConfigStore()).getFieldOffset("Klass::_java_mirror", Integer.class, "OopHandle");
68 Constant wrappedKlassPointer = ((HotSpotResolvedObjectType) runtime.fromClass(TestClass.class)).klass();
69 // this doesn't work. what is this?
70 return new Object[][]{new Object[]{JavaKind.Object, wrappedKlassPointer, (long) offset, TEST_CLASS_CONSTANT, 0}};
71 }
72
73 @DataProvider(name = "positivePrimitive")
74 public static Object[][] getPositivePrimitiveJavaKinds() {
75 List<Object[]> result = new ArrayList<>();
76 for (KindData k : PRIMITIVE_KIND_DATA) {
77 result.add(new Object[] {k.kind, TEST_CONSTANT, k.instanceFieldOffset, k.instanceFieldValue, Math.max(8, k.kind.getBitCount())});
78 result.add(new Object[] {k.kind, TEST_CLASS_CONSTANT, k.staticFieldOffset, k.staticFieldValue, Math.max(8, k.kind.getBitCount())});
79 }
80 return result.toArray(new Object[result.size()][]);
81 }
82
83 @DataProvider(name = "outOfBoundsInstanceFields")
84 public static Object[][] getOutOfBoundsStaticFieldReads() {
85 long instanceSize = WHITE_BOX.getObjectSize(TEST_OBJECT);
86 List<Object[]> result = new ArrayList<>();
87 for (KindData k : PRIMITIVE_KIND_DATA) {
88 long lastValidOffset = instanceSize - (k.kind.getByteCount());
89 result.add(new Object[] {k.kind, TEST_CONSTANT, lastValidOffset, false});
90 result.add(new Object[] {k.kind, TEST_CONSTANT, (long) -1, true});
91 result.add(new Object[] {k.kind, TEST_CONSTANT, lastValidOffset + 1, true});
92 result.add(new Object[] {k.kind, TEST_CONSTANT, lastValidOffset + 100, true});
93 }
94 return result.toArray(new Object[result.size()][]);
95 }
96
97 @DataProvider(name = "outOfBoundsStaticFields")
98 public static Object[][] getOutOfBoundsInstanceFieldReads() {
99 long staticsSize = WHITE_BOX.getObjectSize(TEST_OBJECT.getClass());
100 List<Object[]> result = new ArrayList<>();
101 for (KindData k : PRIMITIVE_KIND_DATA) {
102 long lastValidOffset = staticsSize - (k.kind.getByteCount());
103 result.add(new Object[] {k.kind, TEST_CLASS_CONSTANT, lastValidOffset, false});
104 result.add(new Object[] {k.kind, TEST_CLASS_CONSTANT, (long) -1, true});
105 result.add(new Object[] {k.kind, TEST_CLASS_CONSTANT, lastValidOffset + 1, true});
106 result.add(new Object[] {k.kind, TEST_CLASS_CONSTANT, lastValidOffset + 100, true});
107 }
108 return result.toArray(new Object[result.size()][]);
109 }
110
111 @DataProvider(name = "negative")
112 public static Object[][] getNegativeJavaKinds() {
113 return new Object[][]{
114 new Object[]{JavaKind.Void, JavaConstant.NULL_POINTER},
115 new Object[]{JavaKind.Illegal, JavaConstant.INT_1}};
116 }
117
118
119 private static class TestClass {
120 public final boolean booleanField = true;
121 public final byte byteField = 2;
122 public final short shortField = 3;
123 public final int intField = 4;
124 public final long longField = 5L;
125 public final double doubleField = 6.0d;
126 public final float floatField = 7.0f;
127 public final char charField = 'a';
128 public final String objectField = "abc";
129
130 public static final boolean booleanStaticField = true;
131 public static final byte byteStaticField = 2;
132 public static final short shortStaticField = 3;
133 public static final int intStaticField = 4;
134 public static final long longStaticField = 5L;
135 public static final double doubleStaticField = 6.0d;
136 public static final float floatStaticField = 7.0f;
137 public static final char charStaticField = 'a';
138 public static final String objectStaticField = "abc";
139 }
140
141
142 static class KindData {
143 final JavaKind kind;
144 final Field instanceField;
145 final Field staticField;
146 final long instanceFieldOffset;
147 final long staticFieldOffset;
148 final JavaConstant instanceFieldValue;
149 final JavaConstant staticFieldValue;
150 KindData(JavaKind kind, Object testObject) {
151 this.kind = kind;
152 try {
153 Class<?> c = testObject.getClass();
154 instanceField = c.getDeclaredField(kind.getJavaName() + "Field");
155 staticField = c.getDeclaredField(kind.getJavaName() + "StaticField");
156 instanceField.setAccessible(true);
157 staticField.setAccessible(true);
158 instanceFieldOffset = UNSAFE.objectFieldOffset(instanceField);
159 staticFieldOffset = UNSAFE.staticFieldOffset(staticField);
160 instanceFieldValue = JavaConstant.forBoxedPrimitive(instanceField.get(testObject));
161 staticFieldValue = JavaConstant.forBoxedPrimitive(staticField.get(null));
162 } catch (Exception e) {
163 throw new Error("TESTBUG for kind " + kind, e);
164 }
165 }
166 }
167 }