TestHumongousThresholdArgs.java

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/*
 * @test TestHumongousThresholdArgs
 * @summary Test that Shenandoah humongous threshold args are checked
 * @requires vm.gc.Shenandoah
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @run driver TestHumongousThresholdArgs
 */

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

public class TestHumongousThresholdArgs {
    public static void main(String[] args) throws Exception {
        {
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                    "-Xmx128m",
                    "-XX:+UnlockExperimentalVMOptions",
                    "-XX:+UseShenandoahGC",
                    "-version");
            OutputAnalyzer output = new OutputAnalyzer(pb.start());
            output.shouldHaveExitValue(0);
        }

        int[] valid = new int[] {1, 10, 50, 90, 100};
        int[] invalid = new int[] {-100, -1, 0, 101, 1000};

        for (int v : valid) {
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                    "-Xmx128m",
                    "-XX:+UnlockExperimentalVMOptions",
                    "-XX:+UseShenandoahGC",
                    "-XX:ShenandoahHumongousThreshold=" + v,
                    "-version");
            OutputAnalyzer output = new OutputAnalyzer(pb.start());
            output.shouldHaveExitValue(0);
        }

        for (int v : invalid) {
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                    "-Xmx128m",
                    "-XX:+UnlockExperimentalVMOptions",
                    "-XX:+UseShenandoahGC",
                    "-XX:ShenandoahHumongousThreshold=" + v,
                    "-version");
            OutputAnalyzer output = new OutputAnalyzer(pb.start());
            output.shouldHaveExitValue(1);
        }
    }
}