| /* |
| * Copyright (c) 2015, 2017, 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:+open |
| * @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.compareAndSetInt(base, offset, 0x01234567, 0x89ABCDEF); |
| assertEquals(r, true, "success compareAndSet int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x89ABCDEF, "success compareAndSet int value"); |
| } |
| |
| { |
| boolean r = UNSAFE.compareAndSetInt(base, offset, 0x01234567, 0xCAFEBABE); |
| assertEquals(r, false, "failing compareAndSet int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x89ABCDEF, "failing compareAndSet int value"); |
| } |
| |
| // Advanced compare |
| { |
| int r = UNSAFE.compareAndExchangeInt(base, offset, 0x89ABCDEF, 0x01234567); |
| assertEquals(r, 0x89ABCDEF, "success compareAndExchange int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x01234567, "success compareAndExchange int value"); |
| } |
| |
| { |
| int r = UNSAFE.compareAndExchangeInt(base, offset, 0x89ABCDEF, 0xCAFEBABE); |
| assertEquals(r, 0x01234567, "failing compareAndExchange int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x01234567, "failing compareAndExchange 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.weakCompareAndSetIntPlain(base, offset, 0x01234567, 0x89ABCDEF); |
| } |
| assertEquals(success, true, "weakCompareAndSetPlain int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x89ABCDEF, "weakCompareAndSetPlain int value"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSetIntAcquire(base, offset, 0x89ABCDEF, 0x01234567); |
| } |
| assertEquals(success, true, "weakCompareAndSetAcquire int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x01234567, "weakCompareAndSetAcquire int"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSetIntRelease(base, offset, 0x01234567, 0x89ABCDEF); |
| } |
| assertEquals(success, true, "weakCompareAndSetRelease int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x89ABCDEF, "weakCompareAndSetRelease int"); |
| } |
| |
| { |
| boolean success = false; |
| for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) { |
| success = UNSAFE.weakCompareAndSetInt(base, offset, 0x89ABCDEF, 0x01234567); |
| } |
| assertEquals(success, true, "weakCompareAndSet int"); |
| int x = UNSAFE.getInt(base, offset); |
| assertEquals(x, 0x01234567, "weakCompareAndSet 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"); |
| } |
| } |
| } |