author | shade |
Wed, 15 Jun 2016 11:21:36 +0300 | |
changeset 39419 | cc993a4ab581 |
parent 38234 | 06263a71233c |
child 40059 | c2304140ed64 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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/* |
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* @test |
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* @bug 8143628 |
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* @summary Test unsafe access for short |
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* @modules jdk.unsupported/sun.misc |
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* @run testng/othervm -Diters=100 -Xint SunMiscUnsafeAccessTestShort |
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* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 SunMiscUnsafeAccessTestShort |
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* @run testng/othervm -Diters=20000 -XX:-TieredCompilation SunMiscUnsafeAccessTestShort |
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* @run testng/othervm -Diters=20000 SunMiscUnsafeAccessTestShort |
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*/ |
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import org.testng.annotations.Test; |
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import java.lang.reflect.Field; |
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import static org.testng.Assert.*; |
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public class SunMiscUnsafeAccessTestShort { |
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static final int ITERS = Integer.getInteger("iters", 1); |
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static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10); |
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static final sun.misc.Unsafe UNSAFE; |
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static final long V_OFFSET; |
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|
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static final Object STATIC_V_BASE; |
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|
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static final long STATIC_V_OFFSET; |
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|
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static int ARRAY_OFFSET; |
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|
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static int ARRAY_SHIFT; |
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|
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static { |
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try { |
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Field f = sun.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
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f.setAccessible(true); |
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UNSAFE = (sun.misc.Unsafe) f.get(null); |
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} catch (Exception e) { |
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throw new RuntimeException("Unable to get Unsafe instance.", e); |
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} |
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|
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try { |
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Field staticVField = SunMiscUnsafeAccessTestShort.class.getDeclaredField("static_v"); |
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STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField); |
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STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField); |
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} catch (Exception e) { |
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throw new RuntimeException(e); |
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} |
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|
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try { |
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Field vField = SunMiscUnsafeAccessTestShort.class.getDeclaredField("v"); |
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V_OFFSET = UNSAFE.objectFieldOffset(vField); |
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} catch (Exception e) { |
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throw new RuntimeException(e); |
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} |
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|
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ARRAY_OFFSET = UNSAFE.arrayBaseOffset(short[].class); |
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int ascale = UNSAFE.arrayIndexScale(short[].class); |
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ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale); |
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} |
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|
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static short static_v; |
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|
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short v; |
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|
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@Test |
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public void testFieldInstance() { |
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SunMiscUnsafeAccessTestShort t = new SunMiscUnsafeAccessTestShort(); |
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for (int c = 0; c < ITERS; c++) { |
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testAccess(t, V_OFFSET); |
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} |
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} |
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|
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@Test |
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public void testFieldStatic() { |
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for (int c = 0; c < ITERS; c++) { |
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testAccess(STATIC_V_BASE, STATIC_V_OFFSET); |
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} |
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} |
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|
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105 |
@Test |
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106 |
public void testArray() { |
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short[] array = new short[10]; |
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for (int c = 0; c < ITERS; c++) { |
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for (int i = 0; i < array.length; i++) { |
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testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET); |
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} |
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112 |
} |
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} |
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114 |
|
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115 |
@Test |
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public void testArrayOffHeap() { |
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int size = 10; |
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long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); |
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try { |
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for (int c = 0; c < ITERS; c++) { |
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for (int i = 0; i < size; i++) { |
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testAccess(null, (((long) i) << ARRAY_SHIFT) + address); |
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} |
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} |
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} finally { |
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UNSAFE.freeMemory(address); |
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} |
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} |
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|
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@Test |
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public void testArrayOffHeapDirect() { |
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int size = 10; |
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long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT); |
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try { |
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for (int c = 0; c < ITERS; c++) { |
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for (int i = 0; i < size; i++) { |
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testAccess((((long) i) << ARRAY_SHIFT) + address); |
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} |
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139 |
} |
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140 |
} finally { |
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UNSAFE.freeMemory(address); |
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} |
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} |
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|
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static void testAccess(Object base, long offset) { |
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// Plain |
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{ |
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UNSAFE.putShort(base, offset, (short)0x0123); |
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short x = UNSAFE.getShort(base, offset); |
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assertEquals(x, (short)0x0123, "set short value"); |
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} |
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|
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// Volatile |
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{ |
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UNSAFE.putShortVolatile(base, offset, (short)0x4567); |
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short x = UNSAFE.getShortVolatile(base, offset); |
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assertEquals(x, (short)0x4567, "putVolatile short value"); |
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} |
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|
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160 |
|
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161 |
|
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|
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163 |
|
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164 |
} |
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165 |
|
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static void testAccess(long address) { |
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// Plain |
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168 |
{ |
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UNSAFE.putShort(address, (short)0x0123); |
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short x = UNSAFE.getShort(address); |
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assertEquals(x, (short)0x0123, "set short value"); |
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} |
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173 |
} |
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174 |
} |
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175 |