Mercurial > hg > truffle
view test/compiler/regalloc/C1ObjectSpillInLogicOp.java @ 18708:ed8477e2561c
Reenable LocationMarker.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Tue, 16 Dec 2014 21:48:16 +0100 |
parents | ad45ebfba060 |
children |
line wrap: on
line source
/* * Copyright (c) 2013, 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 8027751 * @summary C1 crashes generating G1 post-barrier in Unsafe.getAndSetObject() intrinsic because of the new value spill * @run main/othervm -XX:+UseG1GC C1ObjectSpillInLogicOp * * G1 barriers use logical operators (xor) on T_OBJECT mixed with T_LONG or T_INT. * The current implementation of logical operations on x86 in C1 doesn't allow for long operands to be on stack. * There is a special code in the register allocator that forces long arguments in registers on x86. However T_OBJECT * can be spilled just fine, and in that case the xor emission will fail. */ import java.util.concurrent.atomic.*; public class C1ObjectSpillInLogicOp { public static void main(String[] args) { AtomicReferenceArray<Integer> x = new AtomicReferenceArray(128); Integer y = new Integer(0); for (int i = 0; i < 50000; i++) { x.getAndSet(i % x.length(), y); } } }