/* * 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 int * * @modules java.base/jdk.internal.misc * @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt * @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt * @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt * @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestInt */ package compiler.unsafe; import org.testng.annotations.Test; import java.lang.reflect.Field; import static org.testng.Assert.*; public class JdkInternalMiscUnsafeAccessTestInt { 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 = JdkInternalMiscUnsafeAccessTestInt.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 = JdkInternalMiscUnsafeAccessTestInt.class.getDeclaredField("v"); V_OFFSET = UNSAFE.objectFieldOffset(vField); } catch (Exception e) { throw new RuntimeException(e); } ARRAY_OFFSET = UNSAFE.arrayBaseOffset(int[].class); int ascale = UNSAFE.arrayIndexScale(int[].class); ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); } static int static_v; int v; @Test public void testFieldInstance() { JdkInternalMiscUnsafeAccessTestInt t = new JdkInternalMiscUnsafeAccessTestInt(); 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() { int[] array = new int[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.putInt(base, offset, 0x01234567); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "set int value"); } // Volatile { UNSAFE.putIntVolatile(base, offset, 0x89ABCDEF); int x = UNSAFE.getIntVolatile(base, offset); assertEquals(x, 0x89ABCDEF, "putVolatile int value"); } // Lazy { UNSAFE.putIntRelease(base, offset, 0x01234567); int x = UNSAFE.getIntAcquire(base, offset); assertEquals(x, 0x01234567, "putRelease int value"); } // Opaque { UNSAFE.putIntOpaque(base, offset, 0x89ABCDEF); int x = UNSAFE.getIntOpaque(base, offset); assertEquals(x, 0x89ABCDEF, "putOpaque int value"); } // Unaligned { UNSAFE.putIntUnaligned(base, offset, 0x89ABCDEF); int x = UNSAFE.getIntUnaligned(base, offset); assertEquals(x, 0x89ABCDEF, "putUnaligned int value"); } { UNSAFE.putIntUnaligned(base, offset, 0x01234567, true); int x = UNSAFE.getIntUnaligned(base, offset, true); assertEquals(x, 0x01234567, "putUnaligned big endian int value"); } { UNSAFE.putIntUnaligned(base, offset, 0x89ABCDEF, false); int x = UNSAFE.getIntUnaligned(base, offset, false); assertEquals(x, 0x89ABCDEF, "putUnaligned little endian int value"); } UNSAFE.putInt(base, offset, 0x01234567); // Compare { boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0x89ABCDEF); assertEquals(r, true, "success compareAndSwap int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x89ABCDEF, "success compareAndSwap int value"); } { boolean r = UNSAFE.compareAndSwapInt(base, offset, 0x01234567, 0xCAFEBABE); assertEquals(r, false, "failing compareAndSwap int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x89ABCDEF, "failing compareAndSwap int value"); } // Advanced compare { int r = UNSAFE.compareAndExchangeIntVolatile(base, offset, 0x89ABCDEF, 0x01234567); assertEquals(r, 0x89ABCDEF, "success compareAndExchangeVolatile int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "success compareAndExchangeVolatile int value"); } { int r = UNSAFE.compareAndExchangeIntVolatile(base, offset, 0x89ABCDEF, 0xCAFEBABE); assertEquals(r, 0x01234567, "failing compareAndExchangeVolatile int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "failing compareAndExchangeVolatile int value"); } { int r = UNSAFE.compareAndExchangeIntAcquire(base, offset, 0x01234567, 0x89ABCDEF); assertEquals(r, 0x01234567, "success compareAndExchangeAcquire int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x89ABCDEF, "success compareAndExchangeAcquire int value"); } { int r = UNSAFE.compareAndExchangeIntAcquire(base, offset, 0x01234567, 0xCAFEBABE); assertEquals(r, 0x89ABCDEF, "failing compareAndExchangeAcquire int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x89ABCDEF, "failing compareAndExchangeAcquire int value"); } { int r = UNSAFE.compareAndExchangeIntRelease(base, offset, 0x89ABCDEF, 0x01234567); assertEquals(r, 0x89ABCDEF, "success compareAndExchangeRelease int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "success compareAndExchangeRelease int value"); } { int r = UNSAFE.compareAndExchangeIntRelease(base, offset, 0x89ABCDEF, 0xCAFEBABE); assertEquals(r, 0x01234567, "failing compareAndExchangeRelease int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "failing compareAndExchangeRelease int value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapInt(base, offset, 0x01234567, 0x89ABCDEF); } assertEquals(success, true, "weakCompareAndSwap int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x89ABCDEF, "weakCompareAndSwap int value"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapIntAcquire(base, offset, 0x89ABCDEF, 0x01234567); } assertEquals(success, true, "weakCompareAndSwapAcquire int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "weakCompareAndSwapAcquire int"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapIntRelease(base, offset, 0x01234567, 0x89ABCDEF); } assertEquals(success, true, "weakCompareAndSwapRelease int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x89ABCDEF, "weakCompareAndSwapRelease int"); } { boolean success = false; for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { success = UNSAFE.weakCompareAndSwapIntVolatile(base, offset, 0x89ABCDEF, 0x01234567); } assertEquals(success, true, "weakCompareAndSwapVolatile int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "weakCompareAndSwapVolatile int"); } UNSAFE.putInt(base, offset, 0x89ABCDEF); // Compare set and get { int o = UNSAFE.getAndSetInt(base, offset, 0x01234567); assertEquals(o, 0x89ABCDEF, "getAndSet int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, 0x01234567, "getAndSet int value"); } UNSAFE.putInt(base, offset, 0x01234567); // get and add, add and get { int o = UNSAFE.getAndAddInt(base, offset, 0x89ABCDEF); assertEquals(o, 0x01234567, "getAndAdd int"); int x = UNSAFE.getInt(base, offset); assertEquals(x, (int)(0x01234567 + 0x89ABCDEF), "getAndAdd int"); } } static void testAccess(long address) { // Plain { UNSAFE.putInt(address, 0x01234567); int x = UNSAFE.getInt(address); assertEquals(x, 0x01234567, "set int value"); } } }