6e6202c14d
Reviewed-by: yadongwang, fyang, vkempik, psandoz
358 lines
13 KiB
Java
358 lines
13 KiB
Java
/*
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* Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8143628
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* @summary Test unsafe access for byte
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*
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* @modules java.base/jdk.internal.misc:+open
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* @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
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* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
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* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
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* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestByte
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*/
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package compiler.unsafe;
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import org.testng.annotations.Test;
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import java.lang.reflect.Field;
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import static org.testng.Assert.*;
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public class JdkInternalMiscUnsafeAccessTestByte {
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static final int ITERS = Integer.getInteger("iters", 1);
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// More resilience for Weak* tests. These operations may spuriously
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// fail, and so we do several attempts with delay on failure.
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// Be mindful of worst-case total time on test, which would be at
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// roughly (delay*attempts) milliseconds.
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//
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static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 100);
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static final int WEAK_DELAY_MS = Math.max(1, Integer.getInteger("weakDelay", 1));
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static final jdk.internal.misc.Unsafe UNSAFE;
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static final long V_OFFSET;
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static final Object STATIC_V_BASE;
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static final long STATIC_V_OFFSET;
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static int ARRAY_OFFSET;
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static int ARRAY_SHIFT;
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static {
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try {
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Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
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f.setAccessible(true);
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UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);
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} catch (Exception e) {
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throw new RuntimeException("Unable to get Unsafe instance.", e);
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}
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try {
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Field staticVField = JdkInternalMiscUnsafeAccessTestByte.class.getDeclaredField("static_v");
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STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField);
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STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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try {
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Field vField = JdkInternalMiscUnsafeAccessTestByte.class.getDeclaredField("v");
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V_OFFSET = UNSAFE.objectFieldOffset(vField);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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ARRAY_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
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int ascale = UNSAFE.arrayIndexScale(byte[].class);
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ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
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}
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static void weakDelay() {
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try {
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if (WEAK_DELAY_MS > 0) {
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Thread.sleep(WEAK_DELAY_MS);
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}
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} catch (InterruptedException ie) {
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// Do nothing.
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}
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}
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static byte static_v;
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byte v;
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@Test
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public void testFieldInstance() {
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JdkInternalMiscUnsafeAccessTestByte t = new JdkInternalMiscUnsafeAccessTestByte();
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for (int c = 0; c < ITERS; c++) {
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testAccess(t, V_OFFSET);
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}
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}
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@Test
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public void testFieldStatic() {
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for (int c = 0; c < ITERS; c++) {
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testAccess(STATIC_V_BASE, STATIC_V_OFFSET);
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}
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}
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@Test
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public void testArray() {
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byte[] array = new byte[10];
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for (int c = 0; c < ITERS; c++) {
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for (int i = 0; i < array.length; i++) {
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testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
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}
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}
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}
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@Test
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public void testArrayOffHeap() {
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int size = 10;
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long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
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try {
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for (int c = 0; c < ITERS; c++) {
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for (int i = 0; i < size; i++) {
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testAccess(null, (((long) i) << ARRAY_SHIFT) + address);
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}
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}
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} finally {
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UNSAFE.freeMemory(address);
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}
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}
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@Test
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public void testArrayOffHeapDirect() {
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int size = 10;
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long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
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try {
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for (int c = 0; c < ITERS; c++) {
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for (int i = 0; i < size; i++) {
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testAccess((((long) i) << ARRAY_SHIFT) + address);
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}
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}
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} finally {
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UNSAFE.freeMemory(address);
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}
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}
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static void testAccess(Object base, long offset) {
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// Plain
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{
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UNSAFE.putByte(base, offset, (byte)0x01);
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "set byte value");
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}
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// Volatile
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{
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UNSAFE.putByteVolatile(base, offset, (byte)0x23);
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byte x = UNSAFE.getByteVolatile(base, offset);
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assertEquals(x, (byte)0x23, "putVolatile byte value");
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}
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// Lazy
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{
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UNSAFE.putByteRelease(base, offset, (byte)0x01);
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byte x = UNSAFE.getByteAcquire(base, offset);
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assertEquals(x, (byte)0x01, "putRelease byte value");
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}
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// Opaque
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{
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UNSAFE.putByteOpaque(base, offset, (byte)0x23);
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byte x = UNSAFE.getByteOpaque(base, offset);
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assertEquals(x, (byte)0x23, "putOpaque byte value");
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}
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UNSAFE.putByte(base, offset, (byte)0x01);
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// Compare
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{
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boolean r = UNSAFE.compareAndSetByte(base, offset, (byte)0x01, (byte)0x23);
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assertEquals(r, true, "success compareAndSet byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "success compareAndSet byte value");
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}
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{
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boolean r = UNSAFE.compareAndSetByte(base, offset, (byte)0x01, (byte)0x45);
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assertEquals(r, false, "failing compareAndSet byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "failing compareAndSet byte value");
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}
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// Advanced compare
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{
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byte r = UNSAFE.compareAndExchangeByte(base, offset, (byte)0x23, (byte)0x01);
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assertEquals(r, (byte)0x23, "success compareAndExchange byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "success compareAndExchange byte value");
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}
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{
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byte r = UNSAFE.compareAndExchangeByte(base, offset, (byte)0x23, (byte)0x45);
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assertEquals(r, (byte)0x01, "failing compareAndExchange byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "failing compareAndExchange byte value");
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}
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{
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byte r = UNSAFE.compareAndExchangeByteAcquire(base, offset, (byte)0x01, (byte)0x23);
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assertEquals(r, (byte)0x01, "success compareAndExchangeAcquire byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "success compareAndExchangeAcquire byte value");
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}
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{
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byte r = UNSAFE.compareAndExchangeByteAcquire(base, offset, (byte)0x01, (byte)0x45);
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assertEquals(r, (byte)0x23, "failing compareAndExchangeAcquire byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "failing compareAndExchangeAcquire byte value");
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}
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{
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byte r = UNSAFE.compareAndExchangeByteRelease(base, offset, (byte)0x23, (byte)0x01);
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assertEquals(r, (byte)0x23, "success compareAndExchangeRelease byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "success compareAndExchangeRelease byte value");
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}
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{
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byte r = UNSAFE.compareAndExchangeByteRelease(base, offset, (byte)0x23, (byte)0x45);
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assertEquals(r, (byte)0x01, "failing compareAndExchangeRelease byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "failing compareAndExchangeRelease byte value");
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}
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{
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boolean success = false;
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for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
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success = UNSAFE.weakCompareAndSetBytePlain(base, offset, (byte)0x01, (byte)0x23);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetPlain byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "success weakCompareAndSetPlain byte value");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetBytePlain(base, offset, (byte)0x01, (byte)0x45);
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assertEquals(success, false, "failing weakCompareAndSetPlain byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "failing weakCompareAndSetPlain byte value");
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}
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{
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boolean success = false;
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for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
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success = UNSAFE.weakCompareAndSetByteAcquire(base, offset, (byte)0x23, (byte)0x01);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetAcquire byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "success weakCompareAndSetAcquire byte");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetByteAcquire(base, offset, (byte)0x23, (byte)0x45);
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assertEquals(success, false, "failing weakCompareAndSetAcquire byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "failing weakCompareAndSetAcquire byte value");
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}
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{
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boolean success = false;
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for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
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success = UNSAFE.weakCompareAndSetByteRelease(base, offset, (byte)0x01, (byte)0x23);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetRelease byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "success weakCompareAndSetRelease byte");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetByteRelease(base, offset, (byte)0x01, (byte)0x45);
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assertEquals(success, false, "failing weakCompareAndSetRelease byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x23, "failing weakCompareAndSetRelease byte value");
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}
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{
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boolean success = false;
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for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
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success = UNSAFE.weakCompareAndSetByte(base, offset, (byte)0x23, (byte)0x01);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSet byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "success weakCompareAndSet byte");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetByte(base, offset, (byte)0x23, (byte)0x45);
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assertEquals(success, false, "failing weakCompareAndSet byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "failing weakCompareAndSet byte value");
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}
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UNSAFE.putByte(base, offset, (byte)0x23);
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// Compare set and get
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{
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byte o = UNSAFE.getAndSetByte(base, offset, (byte)0x01);
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assertEquals(o, (byte)0x23, "getAndSet byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)0x01, "getAndSet byte value");
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}
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UNSAFE.putByte(base, offset, (byte)0x01);
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// get and add, add and get
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{
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byte o = UNSAFE.getAndAddByte(base, offset, (byte)0x23);
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assertEquals(o, (byte)0x01, "getAndAdd byte");
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byte x = UNSAFE.getByte(base, offset);
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assertEquals(x, (byte)((byte)0x01 + (byte)0x23), "getAndAdd byte");
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}
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}
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static void testAccess(long address) {
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// Plain
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{
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UNSAFE.putByte(address, (byte)0x01);
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byte x = UNSAFE.getByte(address);
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assertEquals(x, (byte)0x01, "set byte value");
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}
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}
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}
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