hotspot/test/compiler/unsafe/JdkInternalMiscUnsafeAccessTestByte.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 /*
  * @test
  * @bug 8143628
  * @summary Test unsafe access for byte
  *
  * @modules java.base/jdk.internal.misc:+open
  * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
  * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
  * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
  * @run testng/othervm -Diters=20000                         compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
  */

 package compiler.unsafe;

 import org.testng.annotations.Test;

 import java.lang.reflect.Field;

 import static org.testng.Assert.*;

 public class JdkInternalMiscUnsafeAccessTestByte {
     static final int ITERS = Integer.getInteger("iters", 1);
     static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);

     static final jdk.internal.misc.Unsafe UNSAFE;

     static final long V_OFFSET;

     static final Object STATIC_V_BASE;

     static final long STATIC_V_OFFSET;

     static int ARRAY_OFFSET;

     static int ARRAY_SHIFT;

     static {
         try {
             Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
             f.setAccessible(true);
             UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);
         } catch (Exception e) {
             throw new RuntimeException("Unable to get Unsafe instance.", e);
         }

         try {
             Field staticVField = JdkInternalMiscUnsafeAccessTestByte.class.getDeclaredField("static_v");
             STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField);
             STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField);
         } catch (Exception e) {
             throw new RuntimeException(e);
         }

         try {
             Field vField = JdkInternalMiscUnsafeAccessTestByte.class.getDeclaredField("v");
             V_OFFSET = UNSAFE.objectFieldOffset(vField);
         } catch (Exception e) {
             throw new RuntimeException(e);
         }

         ARRAY_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
         int ascale = UNSAFE.arrayIndexScale(byte[].class);
         ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
     }

     static byte static_v;

     byte v;

     @Test
     public void testFieldInstance() {
         JdkInternalMiscUnsafeAccessTestByte t = new JdkInternalMiscUnsafeAccessTestByte();
         for (int c = 0; c < ITERS; c++) {
             testAccess(t, V_OFFSET);
         }
     }

     @Test
     public void testFieldStatic() {
         for (int c = 0; c < ITERS; c++) {
             testAccess(STATIC_V_BASE, STATIC_V_OFFSET);
         }
     }

     @Test
     public void testArray() {
         byte[] array = new byte[10];
         for (int c = 0; c < ITERS; c++) {
             for (int i = 0; i < array.length; i++) {
                 testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
             }
         }
     }

     @Test
     public void testArrayOffHeap() {
         int size = 10;
         long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
         try {
             for (int c = 0; c < ITERS; c++) {
                 for (int i = 0; i < size; i++) {
                     testAccess(null, (((long) i) << ARRAY_SHIFT) + address);
                 }
             }
         } finally {
             UNSAFE.freeMemory(address);
         }
     }

     @Test
     public void testArrayOffHeapDirect() {
         int size = 10;
         long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
         try {
             for (int c = 0; c < ITERS; c++) {
                 for (int i = 0; i < size; i++) {
                     testAccess((((long) i) << ARRAY_SHIFT) + address);
                 }
             }
         } finally {
             UNSAFE.freeMemory(address);
         }
     }

     static void testAccess(Object base, long offset) {
         // Plain
         {
             UNSAFE.putByte(base, offset, (byte)0x01);
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "set byte value");
         }

         // Volatile
         {
             UNSAFE.putByteVolatile(base, offset, (byte)0x23);
             byte x = UNSAFE.getByteVolatile(base, offset);
             assertEquals(x, (byte)0x23, "putVolatile byte value");
         }


         // Lazy
         {
             UNSAFE.putByteRelease(base, offset, (byte)0x01);
             byte x = UNSAFE.getByteAcquire(base, offset);
             assertEquals(x, (byte)0x01, "putRelease byte value");
         }

         // Opaque
         {
             UNSAFE.putByteOpaque(base, offset, (byte)0x23);
             byte x = UNSAFE.getByteOpaque(base, offset);
             assertEquals(x, (byte)0x23, "putOpaque byte value");
         }


         UNSAFE.putByte(base, offset, (byte)0x01);

         // Compare
         {
             boolean r = UNSAFE.compareAndSwapByte(base, offset, (byte)0x01, (byte)0x23);
             assertEquals(r, true, "success compareAndSwap byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x23, "success compareAndSwap byte value");
         }

         {
             boolean r = UNSAFE.compareAndSwapByte(base, offset, (byte)0x01, (byte)0x45);
             assertEquals(r, false, "failing compareAndSwap byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x23, "failing compareAndSwap byte value");
         }

         // Advanced compare
         {
             byte r = UNSAFE.compareAndExchangeByteVolatile(base, offset, (byte)0x23, (byte)0x01);
             assertEquals(r, (byte)0x23, "success compareAndExchangeVolatile byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "success compareAndExchangeVolatile byte value");
         }

         {
             byte r = UNSAFE.compareAndExchangeByteVolatile(base, offset, (byte)0x23, (byte)0x45);
             assertEquals(r, (byte)0x01, "failing compareAndExchangeVolatile byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "failing compareAndExchangeVolatile byte value");
         }

         {
             byte r = UNSAFE.compareAndExchangeByteAcquire(base, offset, (byte)0x01, (byte)0x23);
             assertEquals(r, (byte)0x01, "success compareAndExchangeAcquire byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x23, "success compareAndExchangeAcquire byte value");
         }

         {
             byte r = UNSAFE.compareAndExchangeByteAcquire(base, offset, (byte)0x01, (byte)0x45);
             assertEquals(r, (byte)0x23, "failing compareAndExchangeAcquire byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x23, "failing compareAndExchangeAcquire byte value");
         }

         {
             byte r = UNSAFE.compareAndExchangeByteRelease(base, offset, (byte)0x23, (byte)0x01);
             assertEquals(r, (byte)0x23, "success compareAndExchangeRelease byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "success compareAndExchangeRelease byte value");
         }

         {
             byte r = UNSAFE.compareAndExchangeByteRelease(base, offset, (byte)0x23, (byte)0x45);
             assertEquals(r, (byte)0x01, "failing compareAndExchangeRelease byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "failing compareAndExchangeRelease byte value");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSwapByte(base, offset, (byte)0x01, (byte)0x23);
             }
             assertEquals(success, true, "weakCompareAndSwap byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x23, "weakCompareAndSwap byte value");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSwapByteAcquire(base, offset, (byte)0x23, (byte)0x01);
             }
             assertEquals(success, true, "weakCompareAndSwapAcquire byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "weakCompareAndSwapAcquire byte");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSwapByteRelease(base, offset, (byte)0x01, (byte)0x23);
             }
             assertEquals(success, true, "weakCompareAndSwapRelease byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x23, "weakCompareAndSwapRelease byte");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSwapByteVolatile(base, offset, (byte)0x23, (byte)0x01);
             }
             assertEquals(success, true, "weakCompareAndSwapVolatile byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "weakCompareAndSwapVolatile byte");
         }

         UNSAFE.putByte(base, offset, (byte)0x23);

         // Compare set and get
         {
             byte o = UNSAFE.getAndSetByte(base, offset, (byte)0x01);
             assertEquals(o, (byte)0x23, "getAndSet byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)0x01, "getAndSet byte value");
         }

         UNSAFE.putByte(base, offset, (byte)0x01);

         // get and add, add and get
         {
             byte o = UNSAFE.getAndAddByte(base, offset, (byte)0x23);
             assertEquals(o, (byte)0x01, "getAndAdd byte");
             byte x = UNSAFE.getByte(base, offset);
             assertEquals(x, (byte)((byte)0x01 + (byte)0x23), "getAndAdd byte");
         }
     }

     static void testAccess(long address) {
         // Plain
         {
             UNSAFE.putByte(address, (byte)0x01);
             byte x = UNSAFE.getByte(address);
             assertEquals(x, (byte)0x01, "set byte value");
         }
     }
 }
	/*
	* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	* @test
	* @bug 8143628
	* @summary Test unsafe access for byte
	*
	* @modules java.base/jdk.internal.misc:+open
	* @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
	* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
	* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
	* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
	*/

	package compiler.unsafe;

	import org.testng.annotations.Test;

	import java.lang.reflect.Field;

	import static org.testng.Assert.*;

	public class JdkInternalMiscUnsafeAccessTestByte {
	static final int ITERS = Integer.getInteger("iters", 1);
	static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);

	static final jdk.internal.misc.Unsafe UNSAFE;

	static final long V_OFFSET;

	static final Object STATIC_V_BASE;

	static final long STATIC_V_OFFSET;

	static int ARRAY_OFFSET;

	static int ARRAY_SHIFT;

	static {
	try {
	Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
	f.setAccessible(true);
	UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);
	} catch (Exception e) {
	throw new RuntimeException("Unable to get Unsafe instance.", e);
	}

	try {
	Field staticVField = JdkInternalMiscUnsafeAccessTestByte.class.getDeclaredField("static_v");
	STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField);
	STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField);
	} catch (Exception e) {
	throw new RuntimeException(e);
	}

	try {
	Field vField = JdkInternalMiscUnsafeAccessTestByte.class.getDeclaredField("v");
	V_OFFSET = UNSAFE.objectFieldOffset(vField);
	} catch (Exception e) {
	throw new RuntimeException(e);
	}

	ARRAY_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
	int ascale = UNSAFE.arrayIndexScale(byte[].class);
	ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
	}

	static byte static_v;

	byte v;

	@Test
	public void testFieldInstance() {
	JdkInternalMiscUnsafeAccessTestByte t = new JdkInternalMiscUnsafeAccessTestByte();
	for (int c = 0; c < ITERS; c++) {
	testAccess(t, V_OFFSET);
	}
	}

	@Test
	public void testFieldStatic() {
	for (int c = 0; c < ITERS; c++) {
	testAccess(STATIC_V_BASE, STATIC_V_OFFSET);
	}
	}

	@Test
	public void testArray() {
	byte[] array = new byte[10];
	for (int c = 0; c < ITERS; c++) {
	for (int i = 0; i < array.length; i++) {
	testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
	}
	}
	}

	@Test
	public void testArrayOffHeap() {
	int size = 10;
	long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
	try {
	for (int c = 0; c < ITERS; c++) {
	for (int i = 0; i < size; i++) {
	testAccess(null, (((long) i) << ARRAY_SHIFT) + address);
	}
	}
	} finally {
	UNSAFE.freeMemory(address);
	}
	}

	@Test
	public void testArrayOffHeapDirect() {
	int size = 10;
	long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
	try {
	for (int c = 0; c < ITERS; c++) {
	for (int i = 0; i < size; i++) {
	testAccess((((long) i) << ARRAY_SHIFT) + address);
	}
	}
	} finally {
	UNSAFE.freeMemory(address);
	}
	}

	static void testAccess(Object base, long offset) {
	// Plain
	{
	UNSAFE.putByte(base, offset, (byte)0x01);
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "set byte value");
	}

	// Volatile
	{
	UNSAFE.putByteVolatile(base, offset, (byte)0x23);
	byte x = UNSAFE.getByteVolatile(base, offset);
	assertEquals(x, (byte)0x23, "putVolatile byte value");
	}


	// Lazy
	{
	UNSAFE.putByteRelease(base, offset, (byte)0x01);
	byte x = UNSAFE.getByteAcquire(base, offset);
	assertEquals(x, (byte)0x01, "putRelease byte value");
	}

	// Opaque
	{
	UNSAFE.putByteOpaque(base, offset, (byte)0x23);
	byte x = UNSAFE.getByteOpaque(base, offset);
	assertEquals(x, (byte)0x23, "putOpaque byte value");
	}


	UNSAFE.putByte(base, offset, (byte)0x01);

	// Compare
	{
	boolean r = UNSAFE.compareAndSwapByte(base, offset, (byte)0x01, (byte)0x23);
	assertEquals(r, true, "success compareAndSwap byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x23, "success compareAndSwap byte value");
	}

	{
	boolean r = UNSAFE.compareAndSwapByte(base, offset, (byte)0x01, (byte)0x45);
	assertEquals(r, false, "failing compareAndSwap byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x23, "failing compareAndSwap byte value");
	}

	// Advanced compare
	{
	byte r = UNSAFE.compareAndExchangeByteVolatile(base, offset, (byte)0x23, (byte)0x01);
	assertEquals(r, (byte)0x23, "success compareAndExchangeVolatile byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "success compareAndExchangeVolatile byte value");
	}

	{
	byte r = UNSAFE.compareAndExchangeByteVolatile(base, offset, (byte)0x23, (byte)0x45);
	assertEquals(r, (byte)0x01, "failing compareAndExchangeVolatile byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "failing compareAndExchangeVolatile byte value");
	}

	{
	byte r = UNSAFE.compareAndExchangeByteAcquire(base, offset, (byte)0x01, (byte)0x23);
	assertEquals(r, (byte)0x01, "success compareAndExchangeAcquire byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x23, "success compareAndExchangeAcquire byte value");
	}

	{
	byte r = UNSAFE.compareAndExchangeByteAcquire(base, offset, (byte)0x01, (byte)0x45);
	assertEquals(r, (byte)0x23, "failing compareAndExchangeAcquire byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x23, "failing compareAndExchangeAcquire byte value");
	}

	{
	byte r = UNSAFE.compareAndExchangeByteRelease(base, offset, (byte)0x23, (byte)0x01);
	assertEquals(r, (byte)0x23, "success compareAndExchangeRelease byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "success compareAndExchangeRelease byte value");
	}

	{
	byte r = UNSAFE.compareAndExchangeByteRelease(base, offset, (byte)0x23, (byte)0x45);
	assertEquals(r, (byte)0x01, "failing compareAndExchangeRelease byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "failing compareAndExchangeRelease byte value");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSwapByte(base, offset, (byte)0x01, (byte)0x23);
	}
	assertEquals(success, true, "weakCompareAndSwap byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x23, "weakCompareAndSwap byte value");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSwapByteAcquire(base, offset, (byte)0x23, (byte)0x01);
	}
	assertEquals(success, true, "weakCompareAndSwapAcquire byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "weakCompareAndSwapAcquire byte");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSwapByteRelease(base, offset, (byte)0x01, (byte)0x23);
	}
	assertEquals(success, true, "weakCompareAndSwapRelease byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x23, "weakCompareAndSwapRelease byte");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSwapByteVolatile(base, offset, (byte)0x23, (byte)0x01);
	}
	assertEquals(success, true, "weakCompareAndSwapVolatile byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "weakCompareAndSwapVolatile byte");
	}

	UNSAFE.putByte(base, offset, (byte)0x23);

	// Compare set and get
	{
	byte o = UNSAFE.getAndSetByte(base, offset, (byte)0x01);
	assertEquals(o, (byte)0x23, "getAndSet byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)0x01, "getAndSet byte value");
	}

	UNSAFE.putByte(base, offset, (byte)0x01);

	// get and add, add and get
	{
	byte o = UNSAFE.getAndAddByte(base, offset, (byte)0x23);
	assertEquals(o, (byte)0x01, "getAndAdd byte");
	byte x = UNSAFE.getByte(base, offset);
	assertEquals(x, (byte)((byte)0x01 + (byte)0x23), "getAndAdd byte");
	}
	}

	static void testAccess(long address) {
	// Plain
	{
	UNSAFE.putByte(address, (byte)0x01);
	byte x = UNSAFE.getByte(address);
	assertEquals(x, (byte)0x01, "set byte value");
	}
	}
	}