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

 /*
  * Copyright (c) 2015, 2017, 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 char
  *
  * @modules java.base/jdk.internal.misc:+open
  * @run testng/othervm -Diters=100   -Xint                   compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
  * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
  * @run testng/othervm -Diters=20000 -XX:-TieredCompilation  compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
  * @run testng/othervm -Diters=20000                         compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
  */

 package compiler.unsafe;

 import org.testng.annotations.Test;

 import java.lang.reflect.Field;

 import static org.testng.Assert.*;

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

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

     static char static_v;

     char v;

     @Test
     public void testFieldInstance() {
         JdkInternalMiscUnsafeAccessTestChar t = new JdkInternalMiscUnsafeAccessTestChar();
         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() {
         char[] array = new char[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.putChar(base, offset, '\u0123');
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "set char value");
         }

         // Volatile
         {
             UNSAFE.putCharVolatile(base, offset, '\u4567');
             char x = UNSAFE.getCharVolatile(base, offset);
             assertEquals(x, '\u4567', "putVolatile char value");
         }


         // Lazy
         {
             UNSAFE.putCharRelease(base, offset, '\u0123');
             char x = UNSAFE.getCharAcquire(base, offset);
             assertEquals(x, '\u0123', "putRelease char value");
         }

         // Opaque
         {
             UNSAFE.putCharOpaque(base, offset, '\u4567');
             char x = UNSAFE.getCharOpaque(base, offset);
             assertEquals(x, '\u4567', "putOpaque char value");
         }

         // Unaligned
         {
             UNSAFE.putCharUnaligned(base, offset, '\u4567');
             char x = UNSAFE.getCharUnaligned(base, offset);
             assertEquals(x, '\u4567', "putUnaligned char value");
         }

         {
             UNSAFE.putCharUnaligned(base, offset, '\u0123', true);
             char x = UNSAFE.getCharUnaligned(base, offset, true);
             assertEquals(x, '\u0123', "putUnaligned big endian char value");
         }

         {
             UNSAFE.putCharUnaligned(base, offset, '\u4567', false);
             char x = UNSAFE.getCharUnaligned(base, offset, false);
             assertEquals(x, '\u4567', "putUnaligned little endian char value");
         }

         UNSAFE.putChar(base, offset, '\u0123');

         // Compare
         {
             boolean r = UNSAFE.compareAndSetChar(base, offset, '\u0123', '\u4567');
             assertEquals(r, true, "success compareAndSet char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u4567', "success compareAndSet char value");
         }

         {
             boolean r = UNSAFE.compareAndSetChar(base, offset, '\u0123', '\u89AB');
             assertEquals(r, false, "failing compareAndSet char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u4567', "failing compareAndSet char value");
         }

         // Advanced compare
         {
             char r = UNSAFE.compareAndExchangeChar(base, offset, '\u4567', '\u0123');
             assertEquals(r, '\u4567', "success compareAndExchange char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "success compareAndExchange char value");
         }

         {
             char r = UNSAFE.compareAndExchangeChar(base, offset, '\u4567', '\u89AB');
             assertEquals(r, '\u0123', "failing compareAndExchange char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "failing compareAndExchange char value");
         }

         {
             char r = UNSAFE.compareAndExchangeCharAcquire(base, offset, '\u0123', '\u4567');
             assertEquals(r, '\u0123', "success compareAndExchangeAcquire char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u4567', "success compareAndExchangeAcquire char value");
         }

         {
             char r = UNSAFE.compareAndExchangeCharAcquire(base, offset, '\u0123', '\u89AB');
             assertEquals(r, '\u4567', "failing compareAndExchangeAcquire char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u4567', "failing compareAndExchangeAcquire char value");
         }

         {
             char r = UNSAFE.compareAndExchangeCharRelease(base, offset, '\u4567', '\u0123');
             assertEquals(r, '\u4567', "success compareAndExchangeRelease char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "success compareAndExchangeRelease char value");
         }

         {
             char r = UNSAFE.compareAndExchangeCharRelease(base, offset, '\u4567', '\u89AB');
             assertEquals(r, '\u0123', "failing compareAndExchangeRelease char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "failing compareAndExchangeRelease char value");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSetCharPlain(base, offset, '\u0123', '\u4567');
             }
             assertEquals(success, true, "weakCompareAndSetPlain char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u4567', "weakCompareAndSetPlain char value");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSetCharAcquire(base, offset, '\u4567', '\u0123');
             }
             assertEquals(success, true, "weakCompareAndSetAcquire char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "weakCompareAndSetAcquire char");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSetCharRelease(base, offset, '\u0123', '\u4567');
             }
             assertEquals(success, true, "weakCompareAndSetRelease char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u4567', "weakCompareAndSetRelease char");
         }

         {
             boolean success = false;
             for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
                 success = UNSAFE.weakCompareAndSetChar(base, offset, '\u4567', '\u0123');
             }
             assertEquals(success, true, "weakCompareAndSet char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "weakCompareAndSet char");
         }

         UNSAFE.putChar(base, offset, '\u4567');

         // Compare set and get
         {
             char o = UNSAFE.getAndSetChar(base, offset, '\u0123');
             assertEquals(o, '\u4567', "getAndSet char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, '\u0123', "getAndSet char value");
         }

         UNSAFE.putChar(base, offset, '\u0123');

         // get and add, add and get
         {
             char o = UNSAFE.getAndAddChar(base, offset, '\u4567');
             assertEquals(o, '\u0123', "getAndAdd char");
             char x = UNSAFE.getChar(base, offset);
             assertEquals(x, (char)('\u0123' + '\u4567'), "getAndAdd char");
         }
     }

     static void testAccess(long address) {
         // Plain
         {
             UNSAFE.putChar(address, '\u0123');
             char x = UNSAFE.getChar(address);
             assertEquals(x, '\u0123', "set char value");
         }
     }
 }
	/*
	* Copyright (c) 2015, 2017, 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 char
	*
	* @modules java.base/jdk.internal.misc:+open
	* @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
	* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
	* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
	* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestChar
	*/

	package compiler.unsafe;

	import org.testng.annotations.Test;

	import java.lang.reflect.Field;

	import static org.testng.Assert.*;

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

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

	static char static_v;

	char v;

	@Test
	public void testFieldInstance() {
	JdkInternalMiscUnsafeAccessTestChar t = new JdkInternalMiscUnsafeAccessTestChar();
	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() {
	char[] array = new char[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.putChar(base, offset, '\u0123');
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "set char value");
	}

	// Volatile
	{
	UNSAFE.putCharVolatile(base, offset, '\u4567');
	char x = UNSAFE.getCharVolatile(base, offset);
	assertEquals(x, '\u4567', "putVolatile char value");
	}


	// Lazy
	{
	UNSAFE.putCharRelease(base, offset, '\u0123');
	char x = UNSAFE.getCharAcquire(base, offset);
	assertEquals(x, '\u0123', "putRelease char value");
	}

	// Opaque
	{
	UNSAFE.putCharOpaque(base, offset, '\u4567');
	char x = UNSAFE.getCharOpaque(base, offset);
	assertEquals(x, '\u4567', "putOpaque char value");
	}

	// Unaligned
	{
	UNSAFE.putCharUnaligned(base, offset, '\u4567');
	char x = UNSAFE.getCharUnaligned(base, offset);
	assertEquals(x, '\u4567', "putUnaligned char value");
	}

	{
	UNSAFE.putCharUnaligned(base, offset, '\u0123', true);
	char x = UNSAFE.getCharUnaligned(base, offset, true);
	assertEquals(x, '\u0123', "putUnaligned big endian char value");
	}

	{
	UNSAFE.putCharUnaligned(base, offset, '\u4567', false);
	char x = UNSAFE.getCharUnaligned(base, offset, false);
	assertEquals(x, '\u4567', "putUnaligned little endian char value");
	}

	UNSAFE.putChar(base, offset, '\u0123');

	// Compare
	{
	boolean r = UNSAFE.compareAndSetChar(base, offset, '\u0123', '\u4567');
	assertEquals(r, true, "success compareAndSet char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u4567', "success compareAndSet char value");
	}

	{
	boolean r = UNSAFE.compareAndSetChar(base, offset, '\u0123', '\u89AB');
	assertEquals(r, false, "failing compareAndSet char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u4567', "failing compareAndSet char value");
	}

	// Advanced compare
	{
	char r = UNSAFE.compareAndExchangeChar(base, offset, '\u4567', '\u0123');
	assertEquals(r, '\u4567', "success compareAndExchange char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "success compareAndExchange char value");
	}

	{
	char r = UNSAFE.compareAndExchangeChar(base, offset, '\u4567', '\u89AB');
	assertEquals(r, '\u0123', "failing compareAndExchange char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "failing compareAndExchange char value");
	}

	{
	char r = UNSAFE.compareAndExchangeCharAcquire(base, offset, '\u0123', '\u4567');
	assertEquals(r, '\u0123', "success compareAndExchangeAcquire char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u4567', "success compareAndExchangeAcquire char value");
	}

	{
	char r = UNSAFE.compareAndExchangeCharAcquire(base, offset, '\u0123', '\u89AB');
	assertEquals(r, '\u4567', "failing compareAndExchangeAcquire char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u4567', "failing compareAndExchangeAcquire char value");
	}

	{
	char r = UNSAFE.compareAndExchangeCharRelease(base, offset, '\u4567', '\u0123');
	assertEquals(r, '\u4567', "success compareAndExchangeRelease char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "success compareAndExchangeRelease char value");
	}

	{
	char r = UNSAFE.compareAndExchangeCharRelease(base, offset, '\u4567', '\u89AB');
	assertEquals(r, '\u0123', "failing compareAndExchangeRelease char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "failing compareAndExchangeRelease char value");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSetCharPlain(base, offset, '\u0123', '\u4567');
	}
	assertEquals(success, true, "weakCompareAndSetPlain char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u4567', "weakCompareAndSetPlain char value");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSetCharAcquire(base, offset, '\u4567', '\u0123');
	}
	assertEquals(success, true, "weakCompareAndSetAcquire char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "weakCompareAndSetAcquire char");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSetCharRelease(base, offset, '\u0123', '\u4567');
	}
	assertEquals(success, true, "weakCompareAndSetRelease char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u4567', "weakCompareAndSetRelease char");
	}

	{
	boolean success = false;
	for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
	success = UNSAFE.weakCompareAndSetChar(base, offset, '\u4567', '\u0123');
	}
	assertEquals(success, true, "weakCompareAndSet char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "weakCompareAndSet char");
	}

	UNSAFE.putChar(base, offset, '\u4567');

	// Compare set and get
	{
	char o = UNSAFE.getAndSetChar(base, offset, '\u0123');
	assertEquals(o, '\u4567', "getAndSet char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, '\u0123', "getAndSet char value");
	}

	UNSAFE.putChar(base, offset, '\u0123');

	// get and add, add and get
	{
	char o = UNSAFE.getAndAddChar(base, offset, '\u4567');
	assertEquals(o, '\u0123', "getAndAdd char");
	char x = UNSAFE.getChar(base, offset);
	assertEquals(x, (char)('\u0123' + '\u4567'), "getAndAdd char");
	}
	}

	static void testAccess(long address) {
	// Plain
	{
	UNSAFE.putChar(address, '\u0123');
	char x = UNSAFE.getChar(address);
	assertEquals(x, '\u0123', "set char value");
	}
	}
	}