312 lines
12 KiB
Java
312 lines
12 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 Object
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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.JdkInternalMiscUnsafeAccessTestObject
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* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
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* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
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* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestObject
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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 JdkInternalMiscUnsafeAccessTestObject {
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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 = JdkInternalMiscUnsafeAccessTestObject.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 = JdkInternalMiscUnsafeAccessTestObject.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(Object[].class);
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int ascale = UNSAFE.arrayIndexScale(Object[].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 Object static_v;
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Object v;
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@Test
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public void testFieldInstance() {
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JdkInternalMiscUnsafeAccessTestObject t = new JdkInternalMiscUnsafeAccessTestObject();
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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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Object[] array = new Object[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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static void testAccess(Object base, long offset) {
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// Plain
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{
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UNSAFE.putReference(base, offset, "foo");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "set Object value");
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}
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// Volatile
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{
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UNSAFE.putReferenceVolatile(base, offset, "bar");
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Object x = UNSAFE.getReferenceVolatile(base, offset);
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assertEquals(x, "bar", "putVolatile Object value");
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}
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// Lazy
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{
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UNSAFE.putReferenceRelease(base, offset, "foo");
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Object x = UNSAFE.getReferenceAcquire(base, offset);
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assertEquals(x, "foo", "putRelease Object value");
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}
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// Opaque
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{
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UNSAFE.putReferenceOpaque(base, offset, "bar");
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Object x = UNSAFE.getReferenceOpaque(base, offset);
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assertEquals(x, "bar", "putOpaque Object value");
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}
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UNSAFE.putReference(base, offset, "foo");
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// Compare
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{
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boolean r = UNSAFE.compareAndSetReference(base, offset, "foo", "bar");
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assertEquals(r, true, "success compareAndSet Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "success compareAndSet Object value");
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}
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{
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boolean r = UNSAFE.compareAndSetReference(base, offset, "foo", "baz");
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assertEquals(r, false, "failing compareAndSet Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "failing compareAndSet Object value");
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}
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// Advanced compare
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{
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Object r = UNSAFE.compareAndExchangeReference(base, offset, "bar", "foo");
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assertEquals(r, "bar", "success compareAndExchange Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "success compareAndExchange Object value");
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}
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{
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Object r = UNSAFE.compareAndExchangeReference(base, offset, "bar", "baz");
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assertEquals(r, "foo", "failing compareAndExchange Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "failing compareAndExchange Object value");
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}
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{
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Object r = UNSAFE.compareAndExchangeReferenceAcquire(base, offset, "foo", "bar");
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assertEquals(r, "foo", "success compareAndExchangeAcquire Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "success compareAndExchangeAcquire Object value");
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}
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{
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Object r = UNSAFE.compareAndExchangeReferenceAcquire(base, offset, "foo", "baz");
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assertEquals(r, "bar", "failing compareAndExchangeAcquire Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "failing compareAndExchangeAcquire Object value");
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}
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{
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Object r = UNSAFE.compareAndExchangeReferenceRelease(base, offset, "bar", "foo");
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assertEquals(r, "bar", "success compareAndExchangeRelease Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "success compareAndExchangeRelease Object value");
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}
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{
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Object r = UNSAFE.compareAndExchangeReferenceRelease(base, offset, "bar", "baz");
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assertEquals(r, "foo", "failing compareAndExchangeRelease Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "failing compareAndExchangeRelease Object 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.weakCompareAndSetReferencePlain(base, offset, "foo", "bar");
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetPlain Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "success weakCompareAndSetPlain Object value");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetReferencePlain(base, offset, "foo", "baz");
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assertEquals(success, false, "failing weakCompareAndSetPlain Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "failing weakCompareAndSetPlain Object 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.weakCompareAndSetReferenceAcquire(base, offset, "bar", "foo");
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetAcquire Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "success weakCompareAndSetAcquire Object");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetReferenceAcquire(base, offset, "bar", "baz");
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assertEquals(success, false, "failing weakCompareAndSetAcquire Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "failing weakCompareAndSetAcquire Object 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.weakCompareAndSetReferenceRelease(base, offset, "foo", "bar");
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetRelease Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "success weakCompareAndSetRelease Object");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetReferenceRelease(base, offset, "foo", "baz");
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assertEquals(success, false, "failing weakCompareAndSetRelease Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "bar", "failing weakCompareAndSetRelease Object 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.weakCompareAndSetReference(base, offset, "bar", "foo");
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSet Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "success weakCompareAndSet Object");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetReference(base, offset, "bar", "baz");
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assertEquals(success, false, "failing weakCompareAndSet Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "failing weakCompareAndSet Object value");
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}
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UNSAFE.putReference(base, offset, "bar");
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// Compare set and get
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{
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Object o = UNSAFE.getAndSetReference(base, offset, "foo");
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assertEquals(o, "bar", "getAndSet Object");
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Object x = UNSAFE.getReference(base, offset);
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assertEquals(x, "foo", "getAndSet Object value");
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}
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}
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}
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