TestAllocLargerThanHeap.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 * @test TestAllocLargerThanHeap
 * @summary Test that allocation of the object larger than heap fails predictably
 * @requires vm.gc.Shenandoah
 * @library /test/lib
 * @run driver TestAllocLargerThanHeap
 */

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

public class TestAllocLargerThanHeap {

    static final int SIZE = 16 * 1024 * 1024;

    static volatile Object sink;

    public static void work() throws Exception {
        sink = new Object[SIZE];
    }

    public static void main(String[] args) throws Exception {
        if (args.length > 0) {
            work();
            return;
        }

        {
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                    "-Xmx16m",
                    "-XX:+UnlockExperimentalVMOptions",
                    "-XX:+UseShenandoahGC",
                    TestAllocLargerThanHeap.class.getName(),
                    "test");

            OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
            analyzer.shouldHaveExitValue(1);
            analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space");
        }

        {
            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                    "-Xmx1g",
                    "-XX:+UnlockExperimentalVMOptions",
                    "-XX:+UseShenandoahGC",
                    TestAllocLargerThanHeap.class.getName(),
                    "test");

            OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
            analyzer.shouldHaveExitValue(0);
            analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space");
        }
    }
}