test/004-UnsafeTest/src/Main.java - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 import java.lang.reflect.Field;
 import sun.misc.Unsafe;

 public class Main {
   private static void check(int actual, int expected, String msg) {
     if (actual != expected) {
       System.out.println(msg + " : " + actual + " != " + expected);
       System.exit(1);
     }
   }

   private static void check(long actual, long expected, String msg) {
     if (actual != expected) {
       System.out.println(msg + " : " + actual + " != " + expected);
       System.exit(1);
     }
   }

   private static void check(float actual, float expected, String msg) {
     if (actual != expected) {
       System.out.println(msg + " : " + actual + " != " + expected);
       System.exit(1);
     }
   }

   private static void check(double actual, double expected, String msg) {
     if (actual != expected) {
       System.out.println(msg + " : " + actual + " != " + expected);
       System.exit(1);
     }
   }

   private static void check(Object actual, Object expected, String msg) {
     if (actual != expected) {
       System.out.println(msg + " : " + actual + " != " + expected);
       System.exit(1);
     }
   }

   private static Unsafe getUnsafe() throws NoSuchFieldException, IllegalAccessException {
     Class<?> unsafeClass = Unsafe.class;
     Field f = unsafeClass.getDeclaredField("theUnsafe");
     f.setAccessible(true);
     return (Unsafe) f.get(null);
   }

   public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
     System.loadLibrary(args[0]);
     Unsafe unsafe = getUnsafe();

     testArrayBaseOffset(unsafe);
     testArrayIndexScale(unsafe);
     testGetAndPutAndCAS(unsafe);
     testGetAndPutVolatile(unsafe);
     testCopyMemoryPrimitiveArrays(unsafe);
   }

   private static void testArrayBaseOffset(Unsafe unsafe) {
     check(unsafe.arrayBaseOffset(boolean[].class), vmArrayBaseOffset(boolean[].class),
         "Unsafe.arrayBaseOffset(boolean[])");
     check(unsafe.arrayBaseOffset(byte[].class), vmArrayBaseOffset(byte[].class),
         "Unsafe.arrayBaseOffset(byte[])");
     check(unsafe.arrayBaseOffset(char[].class), vmArrayBaseOffset(char[].class),
         "Unsafe.arrayBaseOffset(char[])");
     check(unsafe.arrayBaseOffset(double[].class), vmArrayBaseOffset(double[].class),
         "Unsafe.arrayBaseOffset(double[])");
     check(unsafe.arrayBaseOffset(float[].class), vmArrayBaseOffset(float[].class),
         "Unsafe.arrayBaseOffset(float[])");
     check(unsafe.arrayBaseOffset(int[].class), vmArrayBaseOffset(int[].class),
         "Unsafe.arrayBaseOffset(int[])");
     check(unsafe.arrayBaseOffset(long[].class), vmArrayBaseOffset(long[].class),
         "Unsafe.arrayBaseOffset(long[])");
     check(unsafe.arrayBaseOffset(Object[].class), vmArrayBaseOffset(Object[].class),
         "Unsafe.arrayBaseOffset(Object[])");
   }

   private static void testArrayIndexScale(Unsafe unsafe) {
     check(unsafe.arrayIndexScale(boolean[].class), vmArrayIndexScale(boolean[].class),
         "Unsafe.arrayIndexScale(boolean[])");
     check(unsafe.arrayIndexScale(byte[].class), vmArrayIndexScale(byte[].class),
         "Unsafe.arrayIndexScale(byte[])");
     check(unsafe.arrayIndexScale(char[].class), vmArrayIndexScale(char[].class),
         "Unsafe.arrayIndexScale(char[])");
     check(unsafe.arrayIndexScale(double[].class), vmArrayIndexScale(double[].class),
         "Unsafe.arrayIndexScale(double[])");
     check(unsafe.arrayIndexScale(float[].class), vmArrayIndexScale(float[].class),
         "Unsafe.arrayIndexScale(float[])");
     check(unsafe.arrayIndexScale(int[].class), vmArrayIndexScale(int[].class),
         "Unsafe.arrayIndexScale(int[])");
     check(unsafe.arrayIndexScale(long[].class), vmArrayIndexScale(long[].class),
         "Unsafe.arrayIndexScale(long[])");
     check(unsafe.arrayIndexScale(Object[].class), vmArrayIndexScale(Object[].class),
         "Unsafe.arrayIndexScale(Object[])");
   }

   private static void testGetAndPutAndCAS(Unsafe unsafe) throws NoSuchFieldException {
     TestClass t = new TestClass();

     int intValue = 12345678;
     Field intField = TestClass.class.getDeclaredField("intVar");
     long intOffset = unsafe.objectFieldOffset(intField);
     check(unsafe.getInt(t, intOffset), 0, "Unsafe.getInt(Object, long) - initial");
     unsafe.putInt(t, intOffset, intValue);
     check(t.intVar, intValue, "Unsafe.putInt(Object, long, int)");
     check(unsafe.getInt(t, intOffset), intValue, "Unsafe.getInt(Object, long)");

     long longValue = 1234567887654321L;
     Field longField = TestClass.class.getDeclaredField("longVar");
     long longOffset = unsafe.objectFieldOffset(longField);
     check(unsafe.getLong(t, longOffset), 0, "Unsafe.getLong(Object, long) - initial");
     unsafe.putLong(t, longOffset, longValue);
     check(t.longVar, longValue, "Unsafe.putLong(Object, long, long)");
     check(unsafe.getLong(t, longOffset), longValue, "Unsafe.getLong(Object, long)");

     Object objectValue = new Object();
     Field objectField = TestClass.class.getDeclaredField("objectVar");
     long objectOffset = unsafe.objectFieldOffset(objectField);
     check(unsafe.getObject(t, objectOffset), null, "Unsafe.getObject(Object, long) - initial");
     unsafe.putObject(t, objectOffset, objectValue);
     check(t.objectVar, objectValue, "Unsafe.putObject(Object, long, Object)");
     check(unsafe.getObject(t, objectOffset), objectValue, "Unsafe.getObject(Object, long)");

     if (unsafe.compareAndSwapInt(t, intOffset, 0, 1)) {
       System.out.println("Unexpectedly succeeding compareAndSwapInt(t, intOffset, 0, 1)");
     }
     if (!unsafe.compareAndSwapInt(t, intOffset, intValue, 0)) {
       System.out.println(
           "Unexpectedly not succeeding compareAndSwapInt(t, intOffset, intValue, 0)");
     }
     if (!unsafe.compareAndSwapInt(t, intOffset, 0, 1)) {
       System.out.println("Unexpectedly not succeeding compareAndSwapInt(t, intOffset, 0, 1)");
     }
     // Exercise sun.misc.Unsafe.compareAndSwapInt using the same
     // integer (1) for the `expectedValue` and `newValue` arguments.
     if (!unsafe.compareAndSwapInt(t, intOffset, 1, 1)) {
       System.out.println("Unexpectedly not succeeding compareAndSwapInt(t, intOffset, 1, 1)");
     }

     if (unsafe.compareAndSwapLong(t, longOffset, 0, 1)) {
       System.out.println("Unexpectedly succeeding compareAndSwapLong(t, longOffset, 0, 1)");
     }
     if (!unsafe.compareAndSwapLong(t, longOffset, longValue, 0)) {
       System.out.println(
           "Unexpectedly not succeeding compareAndSwapLong(t, longOffset, longValue, 0)");
     }
     if (!unsafe.compareAndSwapLong(t, longOffset, 0, 1)) {
       System.out.println("Unexpectedly not succeeding compareAndSwapLong(t, longOffset, 0, 1)");
     }
     // Exercise sun.misc.Unsafe.compareAndSwapLong using the same
     // integer (1) for the `expectedValue` and `newValue` arguments.
     if (!unsafe.compareAndSwapLong(t, longOffset, 1, 1)) {
       System.out.println("Unexpectedly not succeeding compareAndSwapLong(t, longOffset, 1, 1)");
     }

     // We do not use `null` as argument to sun.misc.Unsafe.compareAndSwapObject
     // in those tests, as this value is not affected by heap poisoning
     // (which uses address negation to poison and unpoison heap object
     // references).  This way, when heap poisoning is enabled, we can
     // better exercise its implementation within that method.
     if (unsafe.compareAndSwapObject(t, objectOffset, new Object(), new Object())) {
       System.out.println("Unexpectedly succeeding " +
           "compareAndSwapObject(t, objectOffset, new Object(), new Object())");
     }
     Object objectValue2 = new Object();
     if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue, objectValue2)) {
       System.out.println("Unexpectedly not succeeding " +
           "compareAndSwapObject(t, objectOffset, objectValue, objectValue2)");
     }
     Object objectValue3 = new Object();
     if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue2, objectValue3)) {
       System.out.println("Unexpectedly not succeeding " +
           "compareAndSwapObject(t, objectOffset, objectValue2, objectValue3)");
     }
     // Exercise sun.misc.Unsafe.compareAndSwapObject using the same
     // object (`objectValue3`) for the `expectedValue` and `newValue` arguments.
     if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue3, objectValue3)) {
       System.out.println("Unexpectedly not succeeding " +
           "compareAndSwapObject(t, objectOffset, objectValue3, objectValue3)");
     }
     // Exercise sun.misc.Unsafe.compareAndSwapObject using the same
     // object (`t`) for the `obj` and `newValue` arguments.
     if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue3, t)) {
       System.out.println(
           "Unexpectedly not succeeding compareAndSwapObject(t, objectOffset, objectValue3, t)");
     }
     // Exercise sun.misc.Unsafe.compareAndSwapObject using the same
     // object (`t`) for the `obj`, `expectedValue` and `newValue` arguments.
     if (!unsafe.compareAndSwapObject(t, objectOffset, t, t)) {
       System.out.println("Unexpectedly not succeeding compareAndSwapObject(t, objectOffset, t, t)");
     }
     // Exercise sun.misc.Unsafe.compareAndSwapObject using the same
     // object (`t`) for the `obj` and `expectedValue` arguments.
     if (!unsafe.compareAndSwapObject(t, objectOffset, t, new Object())) {
       System.out.println(
           "Unexpectedly not succeeding compareAndSwapObject(t, objectOffset, t, new Object())");
     }
   }

   private static void testGetAndPutVolatile(Unsafe unsafe) throws NoSuchFieldException {
     TestVolatileClass tv = new TestVolatileClass();

     int intValue = 12345678;
     Field volatileIntField = TestVolatileClass.class.getDeclaredField("volatileIntVar");
     long volatileIntOffset = unsafe.objectFieldOffset(volatileIntField);
     check(unsafe.getIntVolatile(tv, volatileIntOffset),
           0,
           "Unsafe.getIntVolatile(Object, long) - initial");
     unsafe.putIntVolatile(tv, volatileIntOffset, intValue);
     check(tv.volatileIntVar, intValue, "Unsafe.putIntVolatile(Object, long, int)");
     check(unsafe.getIntVolatile(tv, volatileIntOffset),
           intValue,
           "Unsafe.getIntVolatile(Object, long)");

     long longValue = 1234567887654321L;
     Field volatileLongField = TestVolatileClass.class.getDeclaredField("volatileLongVar");
     long volatileLongOffset = unsafe.objectFieldOffset(volatileLongField);
     check(unsafe.getLongVolatile(tv, volatileLongOffset),
           0,
           "Unsafe.getLongVolatile(Object, long) - initial");
     unsafe.putLongVolatile(tv, volatileLongOffset, longValue);
     check(tv.volatileLongVar, longValue, "Unsafe.putLongVolatile(Object, long, long)");
     check(unsafe.getLongVolatile(tv, volatileLongOffset),
           longValue,
           "Unsafe.getLongVolatile(Object, long)");

     Object objectValue = new Object();
     Field volatileObjectField = TestVolatileClass.class.getDeclaredField("volatileObjectVar");
     long volatileObjectOffset = unsafe.objectFieldOffset(volatileObjectField);
     check(unsafe.getObjectVolatile(tv, volatileObjectOffset),
           null,
           "Unsafe.getObjectVolatile(Object, long) - initial");
     unsafe.putObjectVolatile(tv, volatileObjectOffset, objectValue);
     check(tv.volatileObjectVar, objectValue, "Unsafe.putObjectVolatile(Object, long, Object)");
     check(unsafe.getObjectVolatile(tv, volatileObjectOffset),
           objectValue,
           "Unsafe.getObjectVolatile(Object, long)");
   }

   // Regression test for "copyMemory" operations hitting a DCHECK() for float/double arrays.
   private static void testCopyMemoryPrimitiveArrays(Unsafe unsafe) {
     int size = 4 * 1024;
     long memory = unsafeTestMalloc(size);

     int floatSize = 4;
     float[] inputFloats = new float[size / floatSize];
     for (int i = 0; i != inputFloats.length; ++i) {
       inputFloats[i] = ((float)i) + 0.5f;
     }
     float[] outputFloats = new float[size / floatSize];
     unsafe.copyMemoryFromPrimitiveArray(inputFloats, 0, memory, size);
     unsafe.copyMemoryToPrimitiveArray(memory, outputFloats, 0, size);
     for (int i = 0; i != inputFloats.length; ++i) {
       check(inputFloats[i], outputFloats[i], "unsafe.copyMemory/float");
     }

     int doubleSize = 8;
     double[] inputDoubles = new double[size / doubleSize];
     for (int i = 0; i != inputDoubles.length; ++i) {
       inputDoubles[i] = ((double)i) + 0.5;
     }
     double[] outputDoubles = new double[size / doubleSize];
     unsafe.copyMemoryFromPrimitiveArray(inputDoubles, 0, memory, size);
     unsafe.copyMemoryToPrimitiveArray(memory, outputDoubles, 0, size);
     for (int i = 0; i != inputDoubles.length; ++i) {
       check(inputDoubles[i], outputDoubles[i], "unsafe.copyMemory/double");
     }

     unsafeTestFree(memory);
   }

   private static class TestClass {
     public int intVar = 0;
     public long longVar = 0;
     public Object objectVar = null;
   }

   private static class TestVolatileClass {
     public volatile int volatileIntVar = 0;
     public volatile long volatileLongVar = 0;
     public volatile Object volatileObjectVar = null;
   }

   private static native int vmArrayBaseOffset(Class<?> clazz);
   private static native int vmArrayIndexScale(Class<?> clazz);
   private static native long unsafeTestMalloc(long size);
   private static native void unsafeTestFree(long memory);
 }
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	import java.lang.reflect.Field;
	import sun.misc.Unsafe;

	public class Main {
	private static void check(int actual, int expected, String msg) {
	if (actual != expected) {
	System.out.println(msg + " : " + actual + " != " + expected);
	System.exit(1);
	}
	}

	private static void check(long actual, long expected, String msg) {
	if (actual != expected) {
	System.out.println(msg + " : " + actual + " != " + expected);
	System.exit(1);
	}
	}

	private static void check(float actual, float expected, String msg) {
	if (actual != expected) {
	System.out.println(msg + " : " + actual + " != " + expected);
	System.exit(1);
	}
	}

	private static void check(double actual, double expected, String msg) {
	if (actual != expected) {
	System.out.println(msg + " : " + actual + " != " + expected);
	System.exit(1);
	}
	}

	private static void check(Object actual, Object expected, String msg) {
	if (actual != expected) {
	System.out.println(msg + " : " + actual + " != " + expected);
	System.exit(1);
	}
	}

	private static Unsafe getUnsafe() throws NoSuchFieldException, IllegalAccessException {
	Class<?> unsafeClass = Unsafe.class;
	Field f = unsafeClass.getDeclaredField("theUnsafe");
	f.setAccessible(true);
	return (Unsafe) f.get(null);
	}

	public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
	System.loadLibrary(args[0]);
	Unsafe unsafe = getUnsafe();

	testArrayBaseOffset(unsafe);
	testArrayIndexScale(unsafe);
	testGetAndPutAndCAS(unsafe);
	testGetAndPutVolatile(unsafe);
	testCopyMemoryPrimitiveArrays(unsafe);
	}

	private static void testArrayBaseOffset(Unsafe unsafe) {
	check(unsafe.arrayBaseOffset(boolean[].class), vmArrayBaseOffset(boolean[].class),
	"Unsafe.arrayBaseOffset(boolean[])");
	check(unsafe.arrayBaseOffset(byte[].class), vmArrayBaseOffset(byte[].class),
	"Unsafe.arrayBaseOffset(byte[])");
	check(unsafe.arrayBaseOffset(char[].class), vmArrayBaseOffset(char[].class),
	"Unsafe.arrayBaseOffset(char[])");
	check(unsafe.arrayBaseOffset(double[].class), vmArrayBaseOffset(double[].class),
	"Unsafe.arrayBaseOffset(double[])");
	check(unsafe.arrayBaseOffset(float[].class), vmArrayBaseOffset(float[].class),
	"Unsafe.arrayBaseOffset(float[])");
	check(unsafe.arrayBaseOffset(int[].class), vmArrayBaseOffset(int[].class),
	"Unsafe.arrayBaseOffset(int[])");
	check(unsafe.arrayBaseOffset(long[].class), vmArrayBaseOffset(long[].class),
	"Unsafe.arrayBaseOffset(long[])");
	check(unsafe.arrayBaseOffset(Object[].class), vmArrayBaseOffset(Object[].class),
	"Unsafe.arrayBaseOffset(Object[])");
	}

	private static void testArrayIndexScale(Unsafe unsafe) {
	check(unsafe.arrayIndexScale(boolean[].class), vmArrayIndexScale(boolean[].class),
	"Unsafe.arrayIndexScale(boolean[])");
	check(unsafe.arrayIndexScale(byte[].class), vmArrayIndexScale(byte[].class),
	"Unsafe.arrayIndexScale(byte[])");
	check(unsafe.arrayIndexScale(char[].class), vmArrayIndexScale(char[].class),
	"Unsafe.arrayIndexScale(char[])");
	check(unsafe.arrayIndexScale(double[].class), vmArrayIndexScale(double[].class),
	"Unsafe.arrayIndexScale(double[])");
	check(unsafe.arrayIndexScale(float[].class), vmArrayIndexScale(float[].class),
	"Unsafe.arrayIndexScale(float[])");
	check(unsafe.arrayIndexScale(int[].class), vmArrayIndexScale(int[].class),
	"Unsafe.arrayIndexScale(int[])");
	check(unsafe.arrayIndexScale(long[].class), vmArrayIndexScale(long[].class),
	"Unsafe.arrayIndexScale(long[])");
	check(unsafe.arrayIndexScale(Object[].class), vmArrayIndexScale(Object[].class),
	"Unsafe.arrayIndexScale(Object[])");
	}

	private static void testGetAndPutAndCAS(Unsafe unsafe) throws NoSuchFieldException {
	TestClass t = new TestClass();

	int intValue = 12345678;
	Field intField = TestClass.class.getDeclaredField("intVar");
	long intOffset = unsafe.objectFieldOffset(intField);
	check(unsafe.getInt(t, intOffset), 0, "Unsafe.getInt(Object, long) - initial");
	unsafe.putInt(t, intOffset, intValue);
	check(t.intVar, intValue, "Unsafe.putInt(Object, long, int)");
	check(unsafe.getInt(t, intOffset), intValue, "Unsafe.getInt(Object, long)");

	long longValue = 1234567887654321L;
	Field longField = TestClass.class.getDeclaredField("longVar");
	long longOffset = unsafe.objectFieldOffset(longField);
	check(unsafe.getLong(t, longOffset), 0, "Unsafe.getLong(Object, long) - initial");
	unsafe.putLong(t, longOffset, longValue);
	check(t.longVar, longValue, "Unsafe.putLong(Object, long, long)");
	check(unsafe.getLong(t, longOffset), longValue, "Unsafe.getLong(Object, long)");

	Object objectValue = new Object();
	Field objectField = TestClass.class.getDeclaredField("objectVar");
	long objectOffset = unsafe.objectFieldOffset(objectField);
	check(unsafe.getObject(t, objectOffset), null, "Unsafe.getObject(Object, long) - initial");
	unsafe.putObject(t, objectOffset, objectValue);
	check(t.objectVar, objectValue, "Unsafe.putObject(Object, long, Object)");
	check(unsafe.getObject(t, objectOffset), objectValue, "Unsafe.getObject(Object, long)");

	if (unsafe.compareAndSwapInt(t, intOffset, 0, 1)) {
	System.out.println("Unexpectedly succeeding compareAndSwapInt(t, intOffset, 0, 1)");
	}
	if (!unsafe.compareAndSwapInt(t, intOffset, intValue, 0)) {
	System.out.println(
	"Unexpectedly not succeeding compareAndSwapInt(t, intOffset, intValue, 0)");
	}
	if (!unsafe.compareAndSwapInt(t, intOffset, 0, 1)) {
	System.out.println("Unexpectedly not succeeding compareAndSwapInt(t, intOffset, 0, 1)");
	}
	// Exercise sun.misc.Unsafe.compareAndSwapInt using the same
	// integer (1) for the `expectedValue` and `newValue` arguments.
	if (!unsafe.compareAndSwapInt(t, intOffset, 1, 1)) {
	System.out.println("Unexpectedly not succeeding compareAndSwapInt(t, intOffset, 1, 1)");
	}

	if (unsafe.compareAndSwapLong(t, longOffset, 0, 1)) {
	System.out.println("Unexpectedly succeeding compareAndSwapLong(t, longOffset, 0, 1)");
	}
	if (!unsafe.compareAndSwapLong(t, longOffset, longValue, 0)) {
	System.out.println(
	"Unexpectedly not succeeding compareAndSwapLong(t, longOffset, longValue, 0)");
	}
	if (!unsafe.compareAndSwapLong(t, longOffset, 0, 1)) {
	System.out.println("Unexpectedly not succeeding compareAndSwapLong(t, longOffset, 0, 1)");
	}
	// Exercise sun.misc.Unsafe.compareAndSwapLong using the same
	// integer (1) for the `expectedValue` and `newValue` arguments.
	if (!unsafe.compareAndSwapLong(t, longOffset, 1, 1)) {
	System.out.println("Unexpectedly not succeeding compareAndSwapLong(t, longOffset, 1, 1)");
	}

	// We do not use `null` as argument to sun.misc.Unsafe.compareAndSwapObject
	// in those tests, as this value is not affected by heap poisoning
	// (which uses address negation to poison and unpoison heap object
	// references). This way, when heap poisoning is enabled, we can
	// better exercise its implementation within that method.
	if (unsafe.compareAndSwapObject(t, objectOffset, new Object(), new Object())) {
	System.out.println("Unexpectedly succeeding " +
	"compareAndSwapObject(t, objectOffset, new Object(), new Object())");
	}
	Object objectValue2 = new Object();
	if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue, objectValue2)) {
	System.out.println("Unexpectedly not succeeding " +
	"compareAndSwapObject(t, objectOffset, objectValue, objectValue2)");
	}
	Object objectValue3 = new Object();
	if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue2, objectValue3)) {
	System.out.println("Unexpectedly not succeeding " +
	"compareAndSwapObject(t, objectOffset, objectValue2, objectValue3)");
	}
	// Exercise sun.misc.Unsafe.compareAndSwapObject using the same
	// object (`objectValue3`) for the `expectedValue` and `newValue` arguments.
	if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue3, objectValue3)) {
	System.out.println("Unexpectedly not succeeding " +
	"compareAndSwapObject(t, objectOffset, objectValue3, objectValue3)");
	}
	// Exercise sun.misc.Unsafe.compareAndSwapObject using the same
	// object (`t`) for the `obj` and `newValue` arguments.
	if (!unsafe.compareAndSwapObject(t, objectOffset, objectValue3, t)) {
	System.out.println(
	"Unexpectedly not succeeding compareAndSwapObject(t, objectOffset, objectValue3, t)");
	}
	// Exercise sun.misc.Unsafe.compareAndSwapObject using the same
	// object (`t`) for the `obj`, `expectedValue` and `newValue` arguments.
	if (!unsafe.compareAndSwapObject(t, objectOffset, t, t)) {
	System.out.println("Unexpectedly not succeeding compareAndSwapObject(t, objectOffset, t, t)");
	}
	// Exercise sun.misc.Unsafe.compareAndSwapObject using the same
	// object (`t`) for the `obj` and `expectedValue` arguments.
	if (!unsafe.compareAndSwapObject(t, objectOffset, t, new Object())) {
	System.out.println(
	"Unexpectedly not succeeding compareAndSwapObject(t, objectOffset, t, new Object())");
	}
	}

	private static void testGetAndPutVolatile(Unsafe unsafe) throws NoSuchFieldException {
	TestVolatileClass tv = new TestVolatileClass();

	int intValue = 12345678;
	Field volatileIntField = TestVolatileClass.class.getDeclaredField("volatileIntVar");
	long volatileIntOffset = unsafe.objectFieldOffset(volatileIntField);
	check(unsafe.getIntVolatile(tv, volatileIntOffset),
	0,
	"Unsafe.getIntVolatile(Object, long) - initial");
	unsafe.putIntVolatile(tv, volatileIntOffset, intValue);
	check(tv.volatileIntVar, intValue, "Unsafe.putIntVolatile(Object, long, int)");
	check(unsafe.getIntVolatile(tv, volatileIntOffset),
	intValue,
	"Unsafe.getIntVolatile(Object, long)");

	long longValue = 1234567887654321L;
	Field volatileLongField = TestVolatileClass.class.getDeclaredField("volatileLongVar");
	long volatileLongOffset = unsafe.objectFieldOffset(volatileLongField);
	check(unsafe.getLongVolatile(tv, volatileLongOffset),
	0,
	"Unsafe.getLongVolatile(Object, long) - initial");
	unsafe.putLongVolatile(tv, volatileLongOffset, longValue);
	check(tv.volatileLongVar, longValue, "Unsafe.putLongVolatile(Object, long, long)");
	check(unsafe.getLongVolatile(tv, volatileLongOffset),
	longValue,
	"Unsafe.getLongVolatile(Object, long)");

	Object objectValue = new Object();
	Field volatileObjectField = TestVolatileClass.class.getDeclaredField("volatileObjectVar");
	long volatileObjectOffset = unsafe.objectFieldOffset(volatileObjectField);
	check(unsafe.getObjectVolatile(tv, volatileObjectOffset),
	null,
	"Unsafe.getObjectVolatile(Object, long) - initial");
	unsafe.putObjectVolatile(tv, volatileObjectOffset, objectValue);
	check(tv.volatileObjectVar, objectValue, "Unsafe.putObjectVolatile(Object, long, Object)");
	check(unsafe.getObjectVolatile(tv, volatileObjectOffset),
	objectValue,
	"Unsafe.getObjectVolatile(Object, long)");
	}

	// Regression test for "copyMemory" operations hitting a DCHECK() for float/double arrays.
	private static void testCopyMemoryPrimitiveArrays(Unsafe unsafe) {
	int size = 4 * 1024;
	long memory = unsafeTestMalloc(size);

	int floatSize = 4;
	float[] inputFloats = new float[size / floatSize];
	for (int i = 0; i != inputFloats.length; ++i) {
	inputFloats[i] = ((float)i) + 0.5f;
	}
	float[] outputFloats = new float[size / floatSize];
	unsafe.copyMemoryFromPrimitiveArray(inputFloats, 0, memory, size);
	unsafe.copyMemoryToPrimitiveArray(memory, outputFloats, 0, size);
	for (int i = 0; i != inputFloats.length; ++i) {
	check(inputFloats[i], outputFloats[i], "unsafe.copyMemory/float");
	}

	int doubleSize = 8;
	double[] inputDoubles = new double[size / doubleSize];
	for (int i = 0; i != inputDoubles.length; ++i) {
	inputDoubles[i] = ((double)i) + 0.5;
	}
	double[] outputDoubles = new double[size / doubleSize];
	unsafe.copyMemoryFromPrimitiveArray(inputDoubles, 0, memory, size);
	unsafe.copyMemoryToPrimitiveArray(memory, outputDoubles, 0, size);
	for (int i = 0; i != inputDoubles.length; ++i) {
	check(inputDoubles[i], outputDoubles[i], "unsafe.copyMemory/double");
	}

	unsafeTestFree(memory);
	}

	private static class TestClass {
	public int intVar = 0;
	public long longVar = 0;
	public Object objectVar = null;
	}

	private static class TestVolatileClass {
	public volatile int volatileIntVar = 0;
	public volatile long volatileLongVar = 0;
	public volatile Object volatileObjectVar = null;
	}

	private static native int vmArrayBaseOffset(Class<?> clazz);
	private static native int vmArrayIndexScale(Class<?> clazz);
	private static native long unsafeTestMalloc(long size);
	private static native void unsafeTestFree(long memory);
	}