/* * 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 long * @modules java.base/jdk.internal.misc * @run testng/othervm -Diters=100 -Xint JdkInternalMiscUnsafeAccessTestLong * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 JdkInternalMiscUnsafeAccessTestLong * @run testng/othervm -Diters=20000 -XX:-TieredCompilation JdkInternalMiscUnsafeAccessTestLong * @run testng/othervm -Diters=20000 JdkInternalMiscUnsafeAccessTestLong */ import org.testng.annotations.Test; import java.lang.reflect.Field; import static org.testng.Assert.*; public class JdkInternalMiscUnsafeAccessTestLong { 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 = JdkInternalMiscUnsafeAccessTestLong.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 = JdkInternalMiscUnsafeAccessTestLong.class.getDeclaredField("v"); V_OFFSET = UNSAFE.objectFieldOffset(vField); } catch (Exception e) { throw new RuntimeException(e); } ARRAY_OFFSET = UNSAFE.arrayBaseOffset(long[].class); int ascale = UNSAFE.arrayIndexScale(long[].class); ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); } static long static_v; long v; @Test public void testFieldInstance() { JdkInternalMiscUnsafeAccessTestLong t = new JdkInternalMiscUnsafeAccessTestLong(); 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() { long[] array = new long[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.putLong(base, offset, 0x0123456789ABCDEFL); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "set long value"); } // Volatile { UNSAFE.putLongVolatile(base, offset, 0xCAFEBABECAFEBABEL); long x = UNSAFE.getLongVolatile(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "putVolatile long value"); } // Lazy { UNSAFE.putLongRelease(base, offset, 0x0123456789ABCDEFL); long x = UNSAFE.getLongAcquire(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "putRelease long value"); } // Opaque { UNSAFE.putLongOpaque(base, offset, 0xCAFEBABECAFEBABEL); long x = UNSAFE.getLongOpaque(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "putOpaque long value"); } // Unaligned { UNSAFE.putLongUnaligned(base, offset, 0xCAFEBABECAFEBABEL); long x = UNSAFE.getLongUnaligned(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "putUnaligned long value"); } { UNSAFE.putLongUnaligned(base, offset, 0x0123456789ABCDEFL, true); long x = UNSAFE.getLongUnaligned(base, offset, true); assertEquals(x, 0x0123456789ABCDEFL, "putUnaligned big endian long value"); } { UNSAFE.putLongUnaligned(base, offset, 0xCAFEBABECAFEBABEL, false); long x = UNSAFE.getLongUnaligned(base, offset, false); assertEquals(x, 0xCAFEBABECAFEBABEL, "putUnaligned little endian long value"); } UNSAFE.putLong(base, offset, 0x0123456789ABCDEFL); // Compare { boolean r = UNSAFE.compareAndSwapLong(base, offset, 0x0123456789ABCDEFL, 0xCAFEBABECAFEBABEL); assertEquals(r, true, "success compareAndSwap long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "success compareAndSwap long value"); } { boolean r = UNSAFE.compareAndSwapLong(base, offset, 0x0123456789ABCDEFL, 0xDEADBEEFDEADBEEFL); assertEquals(r, false, "failing compareAndSwap long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "failing compareAndSwap long value"); } // Advanced compare { long r = UNSAFE.compareAndExchangeLongVolatile(base, offset, 0xCAFEBABECAFEBABEL, 0x0123456789ABCDEFL); assertEquals(r, 0xCAFEBABECAFEBABEL, "success compareAndExchangeVolatile long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "success compareAndExchangeVolatile long value"); } { long r = UNSAFE.compareAndExchangeLongVolatile(base, offset, 0xCAFEBABECAFEBABEL, 0xDEADBEEFDEADBEEFL); assertEquals(r, 0x0123456789ABCDEFL, "failing compareAndExchangeVolatile long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "failing compareAndExchangeVolatile long value"); } { long r = UNSAFE.compareAndExchangeLongAcquire(base, offset, 0x0123456789ABCDEFL, 0xCAFEBABECAFEBABEL); assertEquals(r, 0x0123456789ABCDEFL, "success compareAndExchangeAcquire long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "success compareAndExchangeAcquire long value"); } { long r = UNSAFE.compareAndExchangeLongAcquire(base, offset, 0x0123456789ABCDEFL, 0xDEADBEEFDEADBEEFL); assertEquals(r, 0xCAFEBABECAFEBABEL, "failing compareAndExchangeAcquire long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "failing compareAndExchangeAcquire long value"); } { long r = UNSAFE.compareAndExchangeLongRelease(base, offset, 0xCAFEBABECAFEBABEL, 0x0123456789ABCDEFL); assertEquals(r, 0xCAFEBABECAFEBABEL, "success compareAndExchangeRelease long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "success compareAndExchangeRelease long value"); } { long r = UNSAFE.compareAndExchangeLongRelease(base, offset, 0xCAFEBABECAFEBABEL, 0xDEADBEEFDEADBEEFL); assertEquals(r, 0x0123456789ABCDEFL, "failing compareAndExchangeRelease long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "failing compareAndExchangeRelease long value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapLong(base, offset, 0x0123456789ABCDEFL, 0xCAFEBABECAFEBABEL); } assertEquals(success, true, "weakCompareAndSwap long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "weakCompareAndSwap long value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapLongAcquire(base, offset, 0xCAFEBABECAFEBABEL, 0x0123456789ABCDEFL); } assertEquals(success, true, "weakCompareAndSwapAcquire long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "weakCompareAndSwapAcquire long"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapLongRelease(base, offset, 0x0123456789ABCDEFL, 0xCAFEBABECAFEBABEL); } assertEquals(success, true, "weakCompareAndSwapRelease long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0xCAFEBABECAFEBABEL, "weakCompareAndSwapRelease long"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapLongVolatile(base, offset, 0xCAFEBABECAFEBABEL, 0x0123456789ABCDEFL); } assertEquals(success, true, "weakCompareAndSwapVolatile long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "weakCompareAndSwapVolatile long"); } UNSAFE.putLong(base, offset, 0xCAFEBABECAFEBABEL); // Compare set and get { long o = UNSAFE.getAndSetLong(base, offset, 0x0123456789ABCDEFL); assertEquals(o, 0xCAFEBABECAFEBABEL, "getAndSet long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, 0x0123456789ABCDEFL, "getAndSet long value"); } UNSAFE.putLong(base, offset, 0x0123456789ABCDEFL); // get and add, add and get { long o = UNSAFE.getAndAddLong(base, offset, 0xCAFEBABECAFEBABEL); assertEquals(o, 0x0123456789ABCDEFL, "getAndAdd long"); long x = UNSAFE.getLong(base, offset); assertEquals(x, (long)(0x0123456789ABCDEFL + 0xCAFEBABECAFEBABEL), "getAndAdd long"); } } static void testAccess(long address) { // Plain { UNSAFE.putLong(address, 0x0123456789ABCDEFL); long x = UNSAFE.getLong(address); assertEquals(x, 0x0123456789ABCDEFL, "set long value"); } } }