376 lines
14 KiB
Java
376 lines
14 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 short
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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.JdkInternalMiscUnsafeAccessTestShort
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* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
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* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
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* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
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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 JdkInternalMiscUnsafeAccessTestShort {
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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 = JdkInternalMiscUnsafeAccessTestShort.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 = JdkInternalMiscUnsafeAccessTestShort.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(short[].class);
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int ascale = UNSAFE.arrayIndexScale(short[].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 short static_v;
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short v;
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@Test
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public void testFieldInstance() {
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JdkInternalMiscUnsafeAccessTestShort t = new JdkInternalMiscUnsafeAccessTestShort();
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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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short[] array = new short[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.putShort(base, offset, (short)0x0123);
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "set short value");
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}
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// Volatile
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{
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UNSAFE.putShortVolatile(base, offset, (short)0x4567);
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short x = UNSAFE.getShortVolatile(base, offset);
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assertEquals(x, (short)0x4567, "putVolatile short value");
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}
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// Lazy
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{
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UNSAFE.putShortRelease(base, offset, (short)0x0123);
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short x = UNSAFE.getShortAcquire(base, offset);
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assertEquals(x, (short)0x0123, "putRelease short value");
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}
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// Opaque
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{
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UNSAFE.putShortOpaque(base, offset, (short)0x4567);
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short x = UNSAFE.getShortOpaque(base, offset);
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assertEquals(x, (short)0x4567, "putOpaque short value");
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}
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// Unaligned
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{
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UNSAFE.putShortUnaligned(base, offset, (short)0x4567);
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short x = UNSAFE.getShortUnaligned(base, offset);
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assertEquals(x, (short)0x4567, "putUnaligned short value");
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}
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{
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UNSAFE.putShortUnaligned(base, offset, (short)0x0123, true);
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short x = UNSAFE.getShortUnaligned(base, offset, true);
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assertEquals(x, (short)0x0123, "putUnaligned big endian short value");
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}
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{
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UNSAFE.putShortUnaligned(base, offset, (short)0x4567, false);
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short x = UNSAFE.getShortUnaligned(base, offset, false);
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assertEquals(x, (short)0x4567, "putUnaligned little endian short value");
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}
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UNSAFE.putShort(base, offset, (short)0x0123);
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// Compare
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{
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boolean r = UNSAFE.compareAndSetShort(base, offset, (short)0x0123, (short)0x4567);
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assertEquals(r, true, "success compareAndSet short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "success compareAndSet short value");
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}
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{
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boolean r = UNSAFE.compareAndSetShort(base, offset, (short)0x0123, (short)0x89AB);
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assertEquals(r, false, "failing compareAndSet short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "failing compareAndSet short value");
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}
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// Advanced compare
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{
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short r = UNSAFE.compareAndExchangeShort(base, offset, (short)0x4567, (short)0x0123);
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assertEquals(r, (short)0x4567, "success compareAndExchange short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "success compareAndExchange short value");
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}
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{
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short r = UNSAFE.compareAndExchangeShort(base, offset, (short)0x4567, (short)0x89AB);
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assertEquals(r, (short)0x0123, "failing compareAndExchange short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "failing compareAndExchange short value");
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}
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{
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short r = UNSAFE.compareAndExchangeShortAcquire(base, offset, (short)0x0123, (short)0x4567);
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assertEquals(r, (short)0x0123, "success compareAndExchangeAcquire short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "success compareAndExchangeAcquire short value");
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}
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{
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short r = UNSAFE.compareAndExchangeShortAcquire(base, offset, (short)0x0123, (short)0x89AB);
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assertEquals(r, (short)0x4567, "failing compareAndExchangeAcquire short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "failing compareAndExchangeAcquire short value");
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}
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{
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short r = UNSAFE.compareAndExchangeShortRelease(base, offset, (short)0x4567, (short)0x0123);
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assertEquals(r, (short)0x4567, "success compareAndExchangeRelease short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "success compareAndExchangeRelease short value");
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}
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{
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short r = UNSAFE.compareAndExchangeShortRelease(base, offset, (short)0x4567, (short)0x89AB);
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assertEquals(r, (short)0x0123, "failing compareAndExchangeRelease short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "failing compareAndExchangeRelease short 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.weakCompareAndSetShortPlain(base, offset, (short)0x0123, (short)0x4567);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetPlain short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "success weakCompareAndSetPlain short value");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetShortPlain(base, offset, (short)0x0123, (short)0x89AB);
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assertEquals(success, false, "failing weakCompareAndSetPlain short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "failing weakCompareAndSetPlain short 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.weakCompareAndSetShortAcquire(base, offset, (short)0x4567, (short)0x0123);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetAcquire short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "success weakCompareAndSetAcquire short");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetShortAcquire(base, offset, (short)0x4567, (short)0x89AB);
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assertEquals(success, false, "failing weakCompareAndSetAcquire short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "failing weakCompareAndSetAcquire short 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.weakCompareAndSetShortRelease(base, offset, (short)0x0123, (short)0x4567);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetRelease short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "success weakCompareAndSetRelease short");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetShortRelease(base, offset, (short)0x0123, (short)0x89AB);
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assertEquals(success, false, "failing weakCompareAndSetRelease short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x4567, "failing weakCompareAndSetRelease short 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.weakCompareAndSetShort(base, offset, (short)0x4567, (short)0x0123);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSet short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "success weakCompareAndSet short");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetShort(base, offset, (short)0x4567, (short)0x89AB);
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assertEquals(success, false, "failing weakCompareAndSet short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "failing weakCompareAndSet short value");
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}
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UNSAFE.putShort(base, offset, (short)0x4567);
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// Compare set and get
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{
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short o = UNSAFE.getAndSetShort(base, offset, (short)0x0123);
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assertEquals(o, (short)0x4567, "getAndSet short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)0x0123, "getAndSet short value");
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}
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UNSAFE.putShort(base, offset, (short)0x0123);
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// get and add, add and get
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{
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short o = UNSAFE.getAndAddShort(base, offset, (short)0x4567);
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assertEquals(o, (short)0x0123, "getAndAdd short");
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short x = UNSAFE.getShort(base, offset);
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assertEquals(x, (short)((short)0x0123 + (short)0x4567), "getAndAdd short");
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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.putShort(address, (short)0x0123);
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short x = UNSAFE.getShort(address);
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assertEquals(x, (short)0x0123, "set short value");
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}
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}
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}
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