96 lines
4.0 KiB
Java
96 lines
4.0 KiB
Java
/*
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* Copyright (c) 2016, 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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* @test
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* @bug 8161720
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* @modules java.base/jdk.internal.misc
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* @run main/othervm -Xint UnsafeOnHeapBooleanTest 1
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* @run main/othervm -XX:-UseOnStackReplacement -XX:+TieredCompilation -XX:TieredStopAtLevel=3 -Xbatch UnsafeOnHeapBooleanTest 20000
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* @run main/othervm -XX:-UseOnStackReplacement -XX:-TieredCompilation -Xbatch UnsafeOnHeapBooleanTest 20000
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*/
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import java.lang.reflect.Field;
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import jdk.internal.misc.Unsafe;
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public class UnsafeOnHeapBooleanTest {
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static short static_v;
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static boolean bool0 = false, bool1 = false, result = false;
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static Unsafe UNSAFE = Unsafe.getUnsafe();
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public static void test() {
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try {
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// Write two bytes into the static field
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// UnsafeOnHeapBooleanTest.static_v write two values. Both
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// bytes correspond to the boolean value 'true'.
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Field staticVField = UnsafeOnHeapBooleanTest.class.getDeclaredField("static_v");
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Object base = UNSAFE.staticFieldBase(staticVField);
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long offset = UNSAFE.staticFieldOffset(staticVField);
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UNSAFE.putShort(base, offset, (short)0x0204);
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// Read two bytes from the static field
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// UnsafeOnHeapBooleanTest.static_v (as booleans).
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bool0 = UNSAFE.getBoolean(base, offset + 0);
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bool1 = UNSAFE.getBoolean(base, offset + 1);
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result = bool0 & bool1;
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} catch (NoSuchFieldException e) {
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throw new RuntimeException("### Test failure: static field UnsafeOnHeapBooleanTest.static_v was not found");
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}
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}
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public static void main(String args[]) {
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System.out.println("### Test started");
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if (args.length != 1) {
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throw new RuntimeException("### Test failure: test called with incorrect number of arguments");
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}
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try {
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for (int i = 0; i < Integer.parseInt(args[0]); i++) {
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test();
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}
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// Check if the two 'true' boolean values were normalized
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// (i.e., reduced from the range 1...255 to 1).
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if (!bool0 || !bool1 || !result) {
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System.out.println("Some of the results below are wrong");
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System.out.println("bool0 is: " + bool0);
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System.out.println("bool1 is: " + bool1);
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System.out.println("bool0 & bool1 is: " + result);
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System.out.println("===================================");
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throw new RuntimeException("### Test failed");
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} else {
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System.out.println("Test generated correct results");
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System.out.println("bool0 is: " + bool0);
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System.out.println("bool1 is: " + bool1);
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System.out.println("bool0 & bool1 is: " + result);
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System.out.println("===================================");
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}
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} catch (NumberFormatException e) {
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throw new RuntimeException("### Test failure: test called with incorrectly formatted parameter");
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}
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System.out.println("### Test passed");
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}
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}
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