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 jdk.internal.misc.Unsafe;
  31 import jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider;
  32 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider;
  33 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;
  34 import jdk.vm.ci.hotspot.HotSpotVMConfigAccess;
  35 import jdk.vm.ci.meta.Constant;
  36 import jdk.vm.ci.meta.JavaConstant;
  37 import jdk.vm.ci.meta.JavaKind;
  38 import jdk.vm.ci.runtime.JVMCI;
  39 
  40 public class MemoryAccessProviderData {
  41     private static final Unsafe UNSAFE = Unsafe.getUnsafe();
  42     private static final HotSpotConstantReflectionProvider CONSTANT_REFLECTION = (HotSpotConstantReflectionProvider) JVMCI.getRuntime().getHostJVMCIBackend().getConstantReflection();
  43     private static final TestClass TEST_OBJECT = new TestClass();
  44     private static final JavaConstant TEST_CONSTANT = CONSTANT_REFLECTION.forObject(TEST_OBJECT);
  45     private static final JavaConstant TEST_CLASS_CONSTANT = CONSTANT_REFLECTION.forObject(TestClass.class);
  46 
  47     @DataProvider(name = "positiveObject")
  48     public static Object[][] getPositiveObjectJavaKind() {
  49         HotSpotJVMCIRuntimeProvider runtime = (HotSpotJVMCIRuntimeProvider) JVMCI.getRuntime();
  50         int offset = new HotSpotVMConfigAccess(runtime.getConfigStore()).getFieldOffset("Klass::_java_mirror", Integer.class, "oop");
  51         Constant wrappedKlassPointer = ((HotSpotResolvedObjectType) runtime.fromClass(TestClass.class)).klass();
  52         return new Object[][]{new Object[]{JavaKind.Object, wrappedKlassPointer, (long) offset, TEST_CLASS_CONSTANT, 0}};
  53     }
  54 
  55     @DataProvider(name = "positivePrimitive")
  56     public static Object[][] getPositivePrimitiveJavaKinds() {
  57         Field booleanField;
  58         Field byteField;
  59         Field shortField;
  60         Field intField;
  61         Field longField;
  62         Field floatField;
  63         Field doubleField;
  64         Field charField;
  65         try {
  66             booleanField = MemoryAccessProviderData.TestClass.class.getDeclaredField("booleanField");
  67             byteField = MemoryAccessProviderData.TestClass.class.getDeclaredField("byteField");
  68             shortField = MemoryAccessProviderData.TestClass.class.getDeclaredField("shortField");
  69             intField = MemoryAccessProviderData.TestClass.class.getDeclaredField("intField");
  70             longField = MemoryAccessProviderData.TestClass.class.getDeclaredField("longField");
  71             floatField = MemoryAccessProviderData.TestClass.class.getDeclaredField("floatField");
  72             doubleField = MemoryAccessProviderData.TestClass.class.getDeclaredField("doubleField");
  73             charField = MemoryAccessProviderData.TestClass.class.getDeclaredField("charField");
  74         } catch (NoSuchFieldException e) {
  75             throw new Error("TESTBUG: can't find test field " + e, e);
  76         }
  77         long booleanFieldOffset = UNSAFE.objectFieldOffset(booleanField);
  78         long byteFieldOffset = UNSAFE.objectFieldOffset(byteField);
  79         long shortFieldOffset = UNSAFE.objectFieldOffset(shortField);
  80         long intFieldOffset = UNSAFE.objectFieldOffset(intField);
  81         long longFieldOffset = UNSAFE.objectFieldOffset(longField);
  82         long floatFieldOffset = UNSAFE.objectFieldOffset(floatField);
  83         long doubleFieldOffset = UNSAFE.objectFieldOffset(doubleField);
  84         long charFieldOffset = UNSAFE.objectFieldOffset(charField);
  85         return new Object[][]{
  86                         new Object[]{JavaKind.Boolean, TEST_CONSTANT, booleanFieldOffset,
  87                                         JavaConstant.forBoolean(TEST_OBJECT.booleanField), 8},
  88                         new Object[]{JavaKind.Byte, TEST_CONSTANT, byteFieldOffset,
  89                                         JavaConstant.forByte(TEST_OBJECT.byteField), 8},
  90                         new Object[]{JavaKind.Short, TEST_CONSTANT, shortFieldOffset,
  91                                         JavaConstant.forShort(TEST_OBJECT.shortField), 16},
  92                         new Object[]{JavaKind.Int, TEST_CONSTANT, intFieldOffset,
  93                                         JavaConstant.forInt(TEST_OBJECT.intField), 32},
  94                         new Object[]{JavaKind.Long, TEST_CONSTANT, longFieldOffset,
  95                                         JavaConstant.forLong(TEST_OBJECT.longField), 64},
  96                         new Object[]{JavaKind.Float, TEST_CONSTANT, floatFieldOffset,
  97                                         JavaConstant.forFloat(TEST_OBJECT.floatField), 32},
  98                         new Object[]{JavaKind.Double, TEST_CONSTANT, doubleFieldOffset,
  99                                         JavaConstant.forDouble(TEST_OBJECT.doubleField), 64},
 100                         new Object[]{JavaKind.Char, TEST_CONSTANT, charFieldOffset,
 101                                         JavaConstant.forChar(TEST_OBJECT.charField), 16}};
 102     }
 103 
 104     @DataProvider(name = "negative")
 105     public static Object[][] getNegativeJavaKinds() {
 106         return new Object[][]{
 107                         new Object[]{JavaKind.Void, JavaConstant.NULL_POINTER},
 108                         new Object[]{JavaKind.Illegal, JavaConstant.INT_1}};
 109     }
 110 
 111     private static class TestClass {
 112         public final boolean booleanField = true;
 113         public final byte byteField = 2;
 114         public final short shortField = 3;
 115         public final int intField = 4;
 116         public final long longField = 5L;
 117         public final double doubleField = 6.0d;
 118         public final float floatField = 7.0f;
 119         public final char charField = 'a';
 120         public final String stringField = "abc";
 121     }
 122 }