--- /dev/null 2016-08-26 11:23:41.521213300 +0200 +++ new/test/compiler/unsafe/UnsafeOnHeapBooleanTest.java 2016-08-26 15:43:19.783278598 +0200 @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2016, 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 8161720 + * @modules java.base/jdk.internal.misc + * @run main/othervm -Xint UnsafeOnHeapBooleanTest 1 + * @run main/othervm -XX:-UseOnStackReplacement -XX:+TieredCompilation -XX:TieredStopAtLevel=3 -Xbatch UnsafeOnHeapBooleanTest 20000 + * @run main/othervm -XX:-UseOnStackReplacement -XX:-TieredCompilation -Xbatch UnsafeOnHeapBooleanTest 20000 + */ + +import java.lang.reflect.Field; +import jdk.internal.misc.Unsafe; + +public class UnsafeOnHeapBooleanTest { + static short static_v; + static boolean bool0 = false, bool1 = false, result = false; + static Unsafe UNSAFE = Unsafe.getUnsafe(); + + public static void test() { + try { + // Write two bytes into the static field + // UnsafeOnHeapBooleanTest.static_v write two values. Both + // bytes correspond to the boolean value 'true'. + Field staticVField = UnsafeOnHeapBooleanTest.class.getDeclaredField("static_v"); + Object base = UNSAFE.staticFieldBase(staticVField); + long offset = UNSAFE.staticFieldOffset(staticVField); + UNSAFE.putShort(base, offset, (short)0x0204); + + // Read two bytes from the static field + // UnsafeOnHeapBooleanTest.static_v (as booleans). + bool0 = UNSAFE.getBoolean(base, offset + 0); + bool1 = UNSAFE.getBoolean(base, offset + 1); + result = bool0 & bool1; + } catch (NoSuchFieldException e) { + throw new RuntimeException("### Test failure: static field UnsafeOnHeapBooleanTest.static_v was not found"); + } + } + + public static void main(String args[]) { + System.out.println("### Test started"); + + if (args.length != 1) { + throw new RuntimeException("### Test failure: test called with incorrect number of arguments"); + } + + try { + for (int i = 0; i < Integer.parseInt(args[0]); i++) { + test(); + } + + // Check if the two 'true' boolean values were normalized + // (i.e., reduced from the range 1...255 to 1). + if (!bool0 || !bool1 || !result) { + System.out.println("Some of the results below are wrong"); + System.out.println("bool0 is: " + bool0); + System.out.println("bool1 is: " + bool1); + System.out.println("bool0 & bool1 is: " + result); + System.out.println("==================================="); + throw new RuntimeException("### Test failed"); + } else { + System.out.println("Test generated correct results"); + System.out.println("bool0 is: " + bool0); + System.out.println("bool1 is: " + bool1); + System.out.println("bool0 & bool1 is: " + result); + System.out.println("==================================="); + } + } catch (NumberFormatException e) { + throw new RuntimeException("### Test failure: test called with incorrectly formatted parameter"); + } + + System.out.println("### Test passed"); + } +}