/* * 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 float * * @modules java.base/jdk.internal.misc * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestFloat */ package compiler.unsafe; import org.testng.annotations.Test; import java.lang.reflect.Field; import static org.testng.Assert.*; public class JdkInternalMiscUnsafeAccessTestFloat { 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 = JdkInternalMiscUnsafeAccessTestFloat.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 = JdkInternalMiscUnsafeAccessTestFloat.class.getDeclaredField("v"); V_OFFSET = UNSAFE.objectFieldOffset(vField); } catch (Exception e) { throw new RuntimeException(e); } ARRAY_OFFSET = UNSAFE.arrayBaseOffset(float[].class); int ascale = UNSAFE.arrayIndexScale(float[].class); ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); } static float static_v; float v; @Test public void testFieldInstance() { JdkInternalMiscUnsafeAccessTestFloat t = new JdkInternalMiscUnsafeAccessTestFloat(); 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() { float[] array = new float[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.putFloat(base, offset, 1.0f); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "set float value"); } // Volatile { UNSAFE.putFloatVolatile(base, offset, 2.0f); float x = UNSAFE.getFloatVolatile(base, offset); assertEquals(x, 2.0f, "putVolatile float value"); } // Lazy { UNSAFE.putFloatRelease(base, offset, 1.0f); float x = UNSAFE.getFloatAcquire(base, offset); assertEquals(x, 1.0f, "putRelease float value"); } // Opaque { UNSAFE.putFloatOpaque(base, offset, 2.0f); float x = UNSAFE.getFloatOpaque(base, offset); assertEquals(x, 2.0f, "putOpaque float value"); } UNSAFE.putFloat(base, offset, 1.0f); // Compare { boolean r = UNSAFE.compareAndSwapFloat(base, offset, 1.0f, 2.0f); assertEquals(r, true, "success compareAndSwap float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 2.0f, "success compareAndSwap float value"); } { boolean r = UNSAFE.compareAndSwapFloat(base, offset, 1.0f, 3.0f); assertEquals(r, false, "failing compareAndSwap float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 2.0f, "failing compareAndSwap float value"); } // Advanced compare { float r = UNSAFE.compareAndExchangeFloatVolatile(base, offset, 2.0f, 1.0f); assertEquals(r, 2.0f, "success compareAndExchangeVolatile float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "success compareAndExchangeVolatile float value"); } { float r = UNSAFE.compareAndExchangeFloatVolatile(base, offset, 2.0f, 3.0f); assertEquals(r, 1.0f, "failing compareAndExchangeVolatile float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "failing compareAndExchangeVolatile float value"); } { float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 2.0f); assertEquals(r, 1.0f, "success compareAndExchangeAcquire float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 2.0f, "success compareAndExchangeAcquire float value"); } { float r = UNSAFE.compareAndExchangeFloatAcquire(base, offset, 1.0f, 3.0f); assertEquals(r, 2.0f, "failing compareAndExchangeAcquire float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 2.0f, "failing compareAndExchangeAcquire float value"); } { float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 1.0f); assertEquals(r, 2.0f, "success compareAndExchangeRelease float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "success compareAndExchangeRelease float value"); } { float r = UNSAFE.compareAndExchangeFloatRelease(base, offset, 2.0f, 3.0f); assertEquals(r, 1.0f, "failing compareAndExchangeRelease float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "failing compareAndExchangeRelease float value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapFloat(base, offset, 1.0f, 2.0f); } assertEquals(success, true, "weakCompareAndSwap float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 2.0f, "weakCompareAndSwap float value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapFloatAcquire(base, offset, 2.0f, 1.0f); } assertEquals(success, true, "weakCompareAndSwapAcquire float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "weakCompareAndSwapAcquire float"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapFloatRelease(base, offset, 1.0f, 2.0f); } assertEquals(success, true, "weakCompareAndSwapRelease float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 2.0f, "weakCompareAndSwapRelease float"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapFloatVolatile(base, offset, 2.0f, 1.0f); } assertEquals(success, true, "weakCompareAndSwapVolatile float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "weakCompareAndSwapVolatile float"); } UNSAFE.putFloat(base, offset, 2.0f); // Compare set and get { float o = UNSAFE.getAndSetFloat(base, offset, 1.0f); assertEquals(o, 2.0f, "getAndSet float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, 1.0f, "getAndSet float value"); } UNSAFE.putFloat(base, offset, 1.0f); // get and add, add and get { float o = UNSAFE.getAndAddFloat(base, offset, 2.0f); assertEquals(o, 1.0f, "getAndAdd float"); float x = UNSAFE.getFloat(base, offset); assertEquals(x, (float)(1.0f + 2.0f), "getAndAdd float"); } } static void testAccess(long address) { // Plain { UNSAFE.putFloat(address, 1.0f); float x = UNSAFE.getFloat(address); assertEquals(x, 1.0f, "set float value"); } } }