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 float
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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.JdkInternalMiscUnsafeAccessTestFloat
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* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat
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* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat
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* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat
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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 JdkInternalMiscUnsafeAccessTestFloat {
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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 = JdkInternalMiscUnsafeAccessTestFloat.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 = JdkInternalMiscUnsafeAccessTestFloat.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(float[].class);
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int ascale = UNSAFE.arrayIndexScale(float[].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 float static_v;
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float v;
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@Test
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public void testFieldInstance() {
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JdkInternalMiscUnsafeAccessTestFloat t = new JdkInternalMiscUnsafeAccessTestFloat();
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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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float[] array = new float[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.putFloat(base, offset, 1.0f);
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "set float value");
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}
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// Volatile
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{
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UNSAFE.putFloatVolatile(base, offset, 2.0f);
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float x = UNSAFE.getFloatVolatile(base, offset);
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assertEquals(x, 2.0f, "putVolatile float value");
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}
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// Lazy
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{
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UNSAFE.putFloatRelease(base, offset, 1.0f);
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float x = UNSAFE.getFloatAcquire(base, offset);
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assertEquals(x, 1.0f, "putRelease float value");
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}
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// Opaque
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{
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UNSAFE.putFloatOpaque(base, offset, 2.0f);
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float x = UNSAFE.getFloatOpaque(base, offset);
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assertEquals(x, 2.0f, "putOpaque float value");
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}
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UNSAFE.putFloat(base, offset, 1.0f);
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// Compare
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{
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boolean r = UNSAFE.compareAndSetFloat(base, offset, 1.0f, 2.0f);
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assertEquals(r, true, "success compareAndSet float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "success compareAndSet float value");
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}
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{
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boolean r = UNSAFE.compareAndSetFloat(base, offset, 1.0f, 3.0f);
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assertEquals(r, false, "failing compareAndSet float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "failing compareAndSet float value");
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}
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// Advanced compare
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{
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float r = UNSAFE.compareAndExchangeFloat(base, offset, 2.0f, 1.0f);
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assertEquals(r, 2.0f, "success compareAndExchange float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "success compareAndExchange float value");
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}
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{
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float r = UNSAFE.compareAndExchangeFloat(base, offset, 2.0f, 3.0f);
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assertEquals(r, 1.0f, "failing compareAndExchange float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "failing compareAndExchange float value");
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}
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{
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float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 2.0f);
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assertEquals(r, 1.0f, "success compareAndExchangeAcquire float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "success compareAndExchangeAcquire float value");
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}
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{
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float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 3.0f);
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assertEquals(r, 2.0f, "failing compareAndExchangeAcquire float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "failing compareAndExchangeAcquire float value");
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}
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{
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float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 1.0f);
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assertEquals(r, 2.0f, "success compareAndExchangeRelease float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "success compareAndExchangeRelease float value");
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}
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{
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float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 3.0f);
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assertEquals(r, 1.0f, "failing compareAndExchangeRelease float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "failing compareAndExchangeRelease float 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.weakCompareAndSetFloatPlain(base, offset, 1.0f, 2.0f);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetPlain float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "success weakCompareAndSetPlain float value");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetFloatPlain(base, offset, 1.0f, 3.0f);
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assertEquals(success, false, "failing weakCompareAndSetPlain float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "failing weakCompareAndSetPlain float 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.weakCompareAndSetFloatAcquire(base, offset, 2.0f, 1.0f);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetAcquire float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "success weakCompareAndSetAcquire float");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetFloatAcquire(base, offset, 2.0f, 3.0f);
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assertEquals(success, false, "failing weakCompareAndSetAcquire float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "failing weakCompareAndSetAcquire float 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.weakCompareAndSetFloatRelease(base, offset, 1.0f, 2.0f);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSetRelease float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "success weakCompareAndSetRelease float");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetFloatRelease(base, offset, 1.0f, 3.0f);
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assertEquals(success, false, "failing weakCompareAndSetRelease float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 2.0f, "failing weakCompareAndSetRelease float 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.weakCompareAndSetFloat(base, offset, 2.0f, 1.0f);
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if (!success) weakDelay();
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}
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assertEquals(success, true, "success weakCompareAndSet float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "success weakCompareAndSet float");
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}
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{
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boolean success = UNSAFE.weakCompareAndSetFloat(base, offset, 2.0f, 3.0f);
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assertEquals(success, false, "failing weakCompareAndSet float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "failing weakCompareAndSet float value");
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}
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UNSAFE.putFloat(base, offset, 2.0f);
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// Compare set and get
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{
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float o = UNSAFE.getAndSetFloat(base, offset, 1.0f);
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assertEquals(o, 2.0f, "getAndSet float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, 1.0f, "getAndSet float value");
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}
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UNSAFE.putFloat(base, offset, 1.0f);
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// get and add, add and get
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{
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float o = UNSAFE.getAndAddFloat(base, offset, 2.0f);
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assertEquals(o, 1.0f, "getAndAdd float");
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float x = UNSAFE.getFloat(base, offset);
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assertEquals(x, (float)(1.0f + 2.0f), "getAndAdd float");
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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.putFloat(address, 1.0f);
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float x = UNSAFE.getFloat(address);
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assertEquals(x, 1.0f, "set float value");
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}
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}
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}
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