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test/compiler/7009231/Test7009231.java@aed8bf036ce2 (annotated)

test/compiler/7009231/Test7009231.java

Fri, 02 Dec 2011 15:11:40 -0800

author

jcoomes

date

Fri, 02 Dec 2011 15:11:40 -0800

changeset 3301

aed8bf036ce2

parent 0

f90c822e73f8

permissions

-rw-r--r--

Added tag hs23-b07 for changeset 6de8c9ba5907

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	/**
aoqi@0	26	* @test
aoqi@0	27	* @bug 7009231
aoqi@0	28	* @summary C1: Incorrect CAS code for longs on SPARC 32bit
aoqi@0	29	*
aoqi@0	30	* @run main/othervm -Xbatch Test7009231
aoqi@0	31	*
aoqi@0	32	*/
aoqi@0	33
aoqi@0	34	import java.util.Random;
aoqi@0	35	import java.util.concurrent.atomic.AtomicLong;
aoqi@0	36
aoqi@0	37
aoqi@0	38	public class Test7009231 {
aoqi@0	39	public static void main(String[] args) throws InterruptedException {
aoqi@0	40	doTest(8);
aoqi@0	41	}
aoqi@0	42
aoqi@0	43	private static void doTest(int nThreads) throws InterruptedException {
aoqi@0	44	Thread[] aThreads = new Thread[nThreads];
aoqi@0	45	final AtomicLong atl = new AtomicLong();
aoqi@0	46
aoqi@0	47	for (int i = 0; i < nThreads; i++) {
aoqi@0	48	aThreads[i] = new RunnerThread(atl, 1L << (8 * i));
aoqi@0	49	}
aoqi@0	50
aoqi@0	51	for (int i = 0; i < nThreads; i++) {
aoqi@0	52	aThreads[i].start();
aoqi@0	53	}
aoqi@0	54
aoqi@0	55	for (int i = 0; i < nThreads; i++) {
aoqi@0	56	aThreads[i].join();
aoqi@0	57	}
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	public static class RunnerThread extends Thread {
aoqi@0	61	public RunnerThread(AtomicLong atomic, long lMask) {
aoqi@0	62	m_lMask = lMask;
aoqi@0	63	m_atomic = atomic;
aoqi@0	64	}
aoqi@0	65
aoqi@0	66	public void run() {
aoqi@0	67	AtomicLong atomic = m_atomic;
aoqi@0	68	long lMask = m_lMask;
aoqi@0	69	for (int i = 0; i < 100000; i++) {
aoqi@0	70	setBit(atomic, lMask);
aoqi@0	71	clearBit(atomic, lMask);
aoqi@0	72	}
aoqi@0	73	}
aoqi@0	74
aoqi@0	75	protected void setBit(AtomicLong atomic, long lMask) {
aoqi@0	76	long lWord;
aoqi@0	77	do {
aoqi@0	78	lWord = atomic.get();
aoqi@0	79	} while (!atomic.compareAndSet(lWord, lWord | lMask));
aoqi@0	80
aoqi@0	81	if ((atomic.get() & lMask) == 0L) {
aoqi@0	82	throw new InternalError();
aoqi@0	83	}
aoqi@0	84	}
aoqi@0	85
aoqi@0	86	protected void clearBit(AtomicLong atomic, long lMask) {
aoqi@0	87	long lWord;
aoqi@0	88	do {
aoqi@0	89	lWord = atomic.get();
aoqi@0	90	} while (!atomic.compareAndSet(lWord, lWord & ~lMask));
aoqi@0	91
aoqi@0	92	if ((atomic.get() & lMask) != 0L) {
aoqi@0	93	throw new InternalError();
aoqi@0	94	}
aoqi@0	95	}
aoqi@0	96
aoqi@0	97	private long m_lMask;
aoqi@0	98	private AtomicLong m_atomic;
aoqi@0	99	}
aoqi@0	100	}