TestAllocateHeapAt.java

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package gc;

/* @test TestAllocateHeapAt.java
 * @summary Test to check allocation of Java Heap with AllocateHeapAt option
 * @requires vm.gc != "Z" & os.family != "aix"
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 * @run driver gc.TestAllocateHeapAt
 */

import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import java.util.ArrayList;
import java.util.Collections;

public class TestAllocateHeapAt {
  public static void main(String args[]) throws Exception {
    ProcessBuilder pb = ProcessTools.createTestJvm(
        "-XX:AllocateHeapAt=" + System.getProperty("test.dir", "."),
        "-Xlog:gc+heap=info",
        "-Xmx32m",
        "-Xms32m",
        "-version");
    OutputAnalyzer output = new OutputAnalyzer(pb.start());

    System.out.println("Output:\n" + output.getOutput());

    output.shouldContain("Successfully allocated Java heap at location");
    output.shouldHaveExitValue(0);
  }
}