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/*
* 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 boolean
*
* @modules jdk.unsupported/sun.misc
* @run testng/othervm -Diters=100 -Xint compiler.unsafe.SunMiscUnsafeAccessTestBoolean
* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.SunMiscUnsafeAccessTestBoolean
* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.SunMiscUnsafeAccessTestBoolean
* @run testng/othervm -Diters=20000 compiler.unsafe.SunMiscUnsafeAccessTestBoolean
*/
package compiler.unsafe;
import org.testng.annotations.Test;
import java.lang.reflect.Field;
import static org.testng.Assert.*;
public class SunMiscUnsafeAccessTestBoolean {
static final int ITERS = Integer.getInteger("iters", 1);
static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);
static final sun.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 = sun.misc.Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
UNSAFE = (sun.misc.Unsafe) f.get(null);
} catch (Exception e) {
throw new RuntimeException("Unable to get Unsafe instance.", e);
}
try {
Field staticVField = SunMiscUnsafeAccessTestBoolean.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 = SunMiscUnsafeAccessTestBoolean.class.getDeclaredField("v");
V_OFFSET = UNSAFE.objectFieldOffset(vField);
} catch (Exception e) {
throw new RuntimeException(e);
}
ARRAY_OFFSET = UNSAFE.arrayBaseOffset(boolean[].class);
int ascale = UNSAFE.arrayIndexScale(boolean[].class);
ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
}
static boolean static_v;
boolean v;
@Test
public void testFieldInstance() {
SunMiscUnsafeAccessTestBoolean t = new SunMiscUnsafeAccessTestBoolean();
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() {
boolean[] array = new boolean[10];
for (int c = 0; c < ITERS; c++) {
for (int i = 0; i < array.length; i++) {
testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
}
}
}
static void testAccess(Object base, long offset) {
// Plain
{
UNSAFE.putBoolean(base, offset, true);
boolean x = UNSAFE.getBoolean(base, offset);
assertEquals(x, true, "set boolean value");
}
// Volatile
{
UNSAFE.putBooleanVolatile(base, offset, false);
boolean x = UNSAFE.getBooleanVolatile(base, offset);
assertEquals(x, false, "putVolatile boolean value");
}
}
}
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