Java example source code file (TestCompressedClassFlags.java)

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Java - Java tags/keywords

exception, outputanalyzer, processbuilder, testcompressedclassflags, xx:compressedclassspacesize=1g, xx\:\-usecompressedclasspointers

The TestCompressedClassFlags.java Java example source code

/*
 * 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.
 */

import com.oracle.java.testlibrary.*;

/*
 * @test
 * @bug 8015107
 * @summary Tests that VM prints a warning when -XX:CompressedClassSpaceSize
 *          is used together with -XX:-UseCompressedClassPointers
 * @library /testlibrary
 */
public class TestCompressedClassFlags {
    public static void main(String[] args) throws Exception {
        if (Platform.is64bit()) {
            OutputAnalyzer output = runJava("-XX:CompressedClassSpaceSize=1g",
                                            "-XX:-UseCompressedClassPointers",
                                            "-version");
            output.shouldContain("warning");
            output.shouldNotContain("error");
            output.shouldHaveExitValue(0);
        }
    }

    private static OutputAnalyzer runJava(String ... args) throws Exception {
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args);
        return new OutputAnalyzer(pb.start());
    }
}