144 lines
5.0 KiB
Java
144 lines
5.0 KiB
Java
/*
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* Copyright (c) 2018, Red Hat, Inc. 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 8211320
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* @summary Aarch64: unsafe.compareAndSetByte() and unsafe.compareAndSetShort() c2 intrinsics broken with negative expected value
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*
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* @modules java.base/jdk.internal.misc
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* @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation CASandCAEwithNegExpected
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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 CASandCAEwithNegExpected {
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public volatile int f_int = -1;
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public volatile long f_long = -1;
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public volatile byte f_byte = -1;
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public volatile short f_short = -1;
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public static Unsafe unsafe = Unsafe.getUnsafe();
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public static Field f_int_field;
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public static Field f_long_field;
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public static Field f_byte_field;
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public static Field f_short_field;
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public static long f_int_off;
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public static long f_long_off;
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public static long f_byte_off;
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public static long f_short_off;
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static {
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try {
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f_int_field = CASandCAEwithNegExpected.class.getField("f_int");
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f_long_field = CASandCAEwithNegExpected.class.getField("f_long");
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f_byte_field = CASandCAEwithNegExpected.class.getField("f_byte");
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f_short_field = CASandCAEwithNegExpected.class.getField("f_short");
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f_int_off = unsafe.objectFieldOffset(f_int_field);
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f_long_off = unsafe.objectFieldOffset(f_long_field);
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f_byte_off = unsafe.objectFieldOffset(f_byte_field);
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f_short_off = unsafe.objectFieldOffset(f_short_field);
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} catch (Exception e) {
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System.out.println("reflection failed " + e);
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e.printStackTrace();
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}
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}
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static public void main(String[] args) {
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CASandCAEwithNegExpected t = new CASandCAEwithNegExpected();
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for (int i = 0; i < 20_000; i++) {
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t.test();
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}
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}
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// check proper handling of sign extension of expected value in comparison
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void test() {
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f_int = -1;
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f_long = -1;
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f_byte = -1;
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f_short = -1;
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unsafe.compareAndSetInt(this, f_int_off, -1, 42);
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if (f_int != 42) {
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throw new RuntimeException("CAS failed");
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}
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unsafe.compareAndSetLong(this, f_long_off, -1, 42);
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if (f_long != 42) {
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throw new RuntimeException("CAS failed");
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}
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unsafe.compareAndSetByte(this, f_byte_off, (byte)-1, (byte)42);
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if (f_byte != 42) {
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throw new RuntimeException("CAS failed");
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}
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unsafe.compareAndSetShort(this, f_short_off, (short)-1, (short)42);
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if (f_short != 42) {
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throw new RuntimeException("CAS failed");
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}
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f_int = -1;
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f_long = -1;
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f_byte = -1;
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f_short = -1;
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unsafe.compareAndExchangeInt(this, f_int_off, -1, 42);
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if (f_int != 42) {
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throw new RuntimeException("CAE failed");
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}
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unsafe.compareAndExchangeLong(this, f_long_off, -1, 42);
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if (f_long != 42) {
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throw new RuntimeException("CAE failed");
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}
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unsafe.compareAndExchangeByte(this, f_byte_off, (byte)-1, (byte)42);
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if (f_byte != 42) {
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throw new RuntimeException("CAE failed");
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}
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unsafe.compareAndExchangeShort(this, f_short_off, (short)-1, (short)42);
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if (f_short != 42) {
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throw new RuntimeException("CAE failed");
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}
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f_int = -1;
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f_long = -1;
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f_byte = -1;
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f_short = -1;
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if (unsafe.weakCompareAndSetInt(this, f_int_off, -1, 42) && f_int != 42) {
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throw new RuntimeException("CAS failed");
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}
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if (unsafe.weakCompareAndSetLong(this, f_long_off, -1, 42) && f_long != 42) {
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throw new RuntimeException("CAS failed");
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}
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if (unsafe.weakCompareAndSetByte(this, f_byte_off, (byte)-1, (byte)42) && f_byte != 42) {
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throw new RuntimeException("CAS failed");
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}
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if (unsafe.weakCompareAndSetShort(this, f_short_off, (short)-1, (short)42) && f_short != 42) {
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throw new RuntimeException("CAS failed");
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}
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}
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}
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