TestCompressedClassFlags.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package gc.arguments;

import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.Platform;

/*
 * @test
 * @bug 8015107
 * @summary Tests that VM prints a warning when -XX:CompressedClassSpaceSize
 *          is used together with -XX:-UseCompressedClassPointers
 * @library /test/lib
 * @library /
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @run driver gc.arguments.TestCompressedClassFlags
 */
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 = GCArguments.createJavaProcessBuilder(args);
        return new OutputAnalyzer(pb.start());
    }
}