/* * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 8143628 * @summary Test unsafe access for double * * @modules java.base/jdk.internal.misc:+open * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestDouble * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestDouble * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestDouble * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestDouble */ package compiler.unsafe; import org.testng.annotations.Test; import java.lang.reflect.Field; import static org.testng.Assert.*; public class JdkInternalMiscUnsafeAccessTestDouble { static final int ITERS = Integer.getInteger("iters", 1); static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10); static final jdk.internal.misc.Unsafe UNSAFE; static final long V_OFFSET; static final Object STATIC_V_BASE; static final long STATIC_V_OFFSET; static int ARRAY_OFFSET; static int ARRAY_SHIFT; static { try { Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); f.setAccessible(true); UNSAFE = (jdk.internal.misc.Unsafe) f.get(null); } catch (Exception e) { throw new RuntimeException("Unable to get Unsafe instance.", e); } try { Field staticVField = JdkInternalMiscUnsafeAccessTestDouble.class.getDeclaredField("static_v"); STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField); STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField); } catch (Exception e) { throw new RuntimeException(e); } try { Field vField = JdkInternalMiscUnsafeAccessTestDouble.class.getDeclaredField("v"); V_OFFSET = UNSAFE.objectFieldOffset(vField); } catch (Exception e) { throw new RuntimeException(e); } ARRAY_OFFSET = UNSAFE.arrayBaseOffset(double[].class); int ascale = UNSAFE.arrayIndexScale(double[].class); ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); } static double static_v; double v; @Test public void testFieldInstance() { JdkInternalMiscUnsafeAccessTestDouble t = new JdkInternalMiscUnsafeAccessTestDouble(); for (int c = 0; c < ITERS; c++) { testAccess(t, V_OFFSET); } } @Test public void testFieldStatic() { for (int c = 0; c < ITERS; c++) { testAccess(STATIC_V_BASE, STATIC_V_OFFSET); } } @Test public void testArray() { double[] array = new double[10]; for (int c = 0; c < ITERS; c++) { for (int i = 0; i < array.length; i++) { testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET); } } } @Test public void testArrayOffHeap() { int size = 10; long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); try { for (int c = 0; c < ITERS; c++) { for (int i = 0; i < size; i++) { testAccess(null, (((long) i) << ARRAY_SHIFT) + address); } } } finally { UNSAFE.freeMemory(address); } } @Test public void testArrayOffHeapDirect() { int size = 10; long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); try { for (int c = 0; c < ITERS; c++) { for (int i = 0; i < size; i++) { testAccess((((long) i) << ARRAY_SHIFT) + address); } } } finally { UNSAFE.freeMemory(address); } } static void testAccess(Object base, long offset) { // Plain { UNSAFE.putDouble(base, offset, 1.0d); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "set double value"); } // Volatile { UNSAFE.putDoubleVolatile(base, offset, 2.0d); double x = UNSAFE.getDoubleVolatile(base, offset); assertEquals(x, 2.0d, "putVolatile double value"); } // Lazy { UNSAFE.putDoubleRelease(base, offset, 1.0d); double x = UNSAFE.getDoubleAcquire(base, offset); assertEquals(x, 1.0d, "putRelease double value"); } // Opaque { UNSAFE.putDoubleOpaque(base, offset, 2.0d); double x = UNSAFE.getDoubleOpaque(base, offset); assertEquals(x, 2.0d, "putOpaque double value"); } UNSAFE.putDouble(base, offset, 1.0d); // Compare { boolean r = UNSAFE.compareAndSwapDouble(base, offset, 1.0d, 2.0d); assertEquals(r, true, "success compareAndSwap double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 2.0d, "success compareAndSwap double value"); } { boolean r = UNSAFE.compareAndSwapDouble(base, offset, 1.0d, 3.0d); assertEquals(r, false, "failing compareAndSwap double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 2.0d, "failing compareAndSwap double value"); } // Advanced compare { double r = UNSAFE.compareAndExchangeDoubleVolatile(base, offset, 2.0d, 1.0d); assertEquals(r, 2.0d, "success compareAndExchangeVolatile double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "success compareAndExchangeVolatile double value"); } { double r = UNSAFE.compareAndExchangeDoubleVolatile(base, offset, 2.0d, 3.0d); assertEquals(r, 1.0d, "failing compareAndExchangeVolatile double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "failing compareAndExchangeVolatile double value"); } { double r = UNSAFE.compareAndExchangeDoubleAcquire(base, offset, 1.0d, 2.0d); assertEquals(r, 1.0d, "success compareAndExchangeAcquire double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 2.0d, "success compareAndExchangeAcquire double value"); } { double r = UNSAFE.compareAndExchangeDoubleAcquire(base, offset, 1.0d, 3.0d); assertEquals(r, 2.0d, "failing compareAndExchangeAcquire double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 2.0d, "failing compareAndExchangeAcquire double value"); } { double r = UNSAFE.compareAndExchangeDoubleRelease(base, offset, 2.0d, 1.0d); assertEquals(r, 2.0d, "success compareAndExchangeRelease double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "success compareAndExchangeRelease double value"); } { double r = UNSAFE.compareAndExchangeDoubleRelease(base, offset, 2.0d, 3.0d); assertEquals(r, 1.0d, "failing compareAndExchangeRelease double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "failing compareAndExchangeRelease double value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapDouble(base, offset, 1.0d, 2.0d); } assertEquals(success, true, "weakCompareAndSwap double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 2.0d, "weakCompareAndSwap double value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapDoubleAcquire(base, offset, 2.0d, 1.0d); } assertEquals(success, true, "weakCompareAndSwapAcquire double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "weakCompareAndSwapAcquire double"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapDoubleRelease(base, offset, 1.0d, 2.0d); } assertEquals(success, true, "weakCompareAndSwapRelease double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 2.0d, "weakCompareAndSwapRelease double"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapDoubleVolatile(base, offset, 2.0d, 1.0d); } assertEquals(success, true, "weakCompareAndSwapVolatile double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "weakCompareAndSwapVolatile double"); } UNSAFE.putDouble(base, offset, 2.0d); // Compare set and get { double o = UNSAFE.getAndSetDouble(base, offset, 1.0d); assertEquals(o, 2.0d, "getAndSet double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, 1.0d, "getAndSet double value"); } UNSAFE.putDouble(base, offset, 1.0d); // get and add, add and get { double o = UNSAFE.getAndAddDouble(base, offset, 2.0d); assertEquals(o, 1.0d, "getAndAdd double"); double x = UNSAFE.getDouble(base, offset); assertEquals(x, (double)(1.0d + 2.0d), "getAndAdd double"); } } static void testAccess(long address) { // Plain { UNSAFE.putDouble(address, 1.0d); double x = UNSAFE.getDouble(address); assertEquals(x, 1.0d, "set double value"); } } }