/*

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 * 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

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 *

 * 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.

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 */

/*

 * @test

 * @bug 8022865

 * @summary Tests for the -XX:CompressedClassSpaceSize command line option

 * @library /test/lib

 * @modules java.base/jdk.internal.misc

 *          java.management

 * @run main CompressedClassSpaceSize

 */

import jdk.test.lib.Platform;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class CompressedClassSpaceSize {

    public static void main(String[] args) throws Exception {

        ProcessBuilder pb;

        OutputAnalyzer output;

        if (Platform.is64bit()) {

            // Minimum size is 1MB

            pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=0",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("outside the allowed range")

                  .shouldHaveExitValue(1);

            // Invalid size of -1 should be handled correctly

            pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=-1",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("Improperly specified VM option 'CompressedClassSpaceSize=-1'")

                  .shouldHaveExitValue(1);

            // Maximum size is 3GB

            pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=4g",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("outside the allowed range")

                  .shouldHaveExitValue(1);

            // Make sure the minimum size is set correctly and printed

            pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",

                                                       "-XX:CompressedClassSpaceSize=1m",

                                                       "-Xlog:gc+metaspace=trace",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("Compressed class space size: 1048576")

                  .shouldHaveExitValue(0);

            // Make sure the maximum size is set correctly and printed

            pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions",

                                                       "-XX:CompressedClassSpaceSize=3g",

                                                       "-Xlog:gc+metaspace=trace",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("Compressed class space size: 3221225472")

                  .shouldHaveExitValue(0);

            pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedOops",

                                                       "-XX:CompressedClassSpaceSize=1m",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")

                  .shouldHaveExitValue(0);

            pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedClassPointers",

                                                       "-XX:CompressedClassSpaceSize=1m",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")

                  .shouldHaveExitValue(0);

        } else {

            // 32bit platforms doesn't have compressed oops

            pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=1m",

                                                       "-version");

            output = new OutputAnalyzer(pb.start());

            output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used")

                  .shouldHaveExitValue(0);

        }

    }

}