test/hotspot/jtreg/gc/TestAllocateHeapAt.java

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/* @test TestAllocateHeapAt.java
 * @key gc
 * @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
 */

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 {
    ArrayList<String> vmOpts = new ArrayList();

    String testVmOptsStr = System.getProperty("test.java.opts");
    if (!testVmOptsStr.isEmpty()) {
      String[] testVmOpts = testVmOptsStr.split(" ");
      Collections.addAll(vmOpts, testVmOpts);
    }
    String test_dir = System.getProperty("test.dir", ".");
    Collections.addAll(vmOpts, new String[] {"-XX:AllocateHeapAt=" + test_dir,
                                             "-Xlog:gc+heap=info",
                                             "-Xmx32m",
                                             "-Xms32m",
                                             "-version"});

    System.out.print("Testing:\n" + JDKToolFinder.getJDKTool("java"));
    for (int i = 0; i < vmOpts.size(); i += 1) {
      System.out.print(" " + vmOpts.get(i));
    }
    System.out.println();

    ProcessBuilder pb =
      ProcessTools.createJavaProcessBuilder(vmOpts.toArray(new String[vmOpts.size()]));
    OutputAnalyzer output = new OutputAnalyzer(pb.start());

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

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