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