view test/compiler/6539464/Test.java @ 1359:23b1b27ac76c

6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.") Summary: Make sure that two marking cycles do not overlap, i.e., a new one can only start after the concurrent marking thread finishes all its work. In the fix I piggy-back a couple of minor extra fixes: some general code reformatting for consistency (only around the code I modified), the removal of a field (G1CollectorPolicy::_should_initiate_conc_mark) which doesn't seem to be used at all (it's only set but never read), as well as moving the "is GC locker active" test earlier into the G1 pause / Full GC and using a more appropriate method for it. Reviewed-by: johnc, jmasa, jcoomes, ysr
author tonyp
date Tue, 06 Apr 2010 10:59:45 -0400
parents 819880572f09
children c18cbe5936b8
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/*
 * Copyright 2009 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/**
 * @test
 * @bug 6539464
 * @summary Math.log() produces inconsistent results between successive runs.
 *
 * @run main/othervm -Xcomp -XX:CompileOnly=Test.main Test
 */

public class Test {
    static double log_value = 17197;
    static double log_result = Math.log(log_value);

    public static void main(String[] args) throws Exception {
        for (int i = 0; i < 1000000; i++) {
            double log_result2 = Math.log(log_value);
            if (log_result2 != log_result) {
                throw new InternalError("Math.log produces inconsistent results: " + log_result2 + " != " + log_result);
            }
        }
    }
}