test/hotspot/jtreg/gc/TestAllocateHeapAtMultiple.java

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/* @test TestAllocateHeapAtMultiple.java
 * @key gc
 * @summary Test to check allocation of Java Heap with AllocateHeapAt option. Has multiple sub-tests to cover different code paths.
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 * @requires vm.bits == "64" & vm.gc != "Z" & os.family != "aix"
 * @run main/timeout=360 TestAllocateHeapAtMultiple
 */

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 TestAllocateHeapAtMultiple {
  public static void main(String args[]) throws Exception {
    ArrayList<String> vmOpts = new ArrayList();
    String[] testVmOpts = null;

    String test_dir = System.getProperty("test.dir", ".");

    String testVmOptsStr = System.getProperty("test.java.opts");
    if (!testVmOptsStr.isEmpty()) {
      testVmOpts = testVmOptsStr.split(" ");
    }

    // Extra options for each of the sub-tests
    String[] extraOptsList = new String[] {
      "-Xmx32m -Xms32m -XX:+UseCompressedOops",     // 1. With compressedoops enabled.
      "-Xmx32m -Xms32m -XX:-UseCompressedOops",     // 2. With compressedoops disabled.
      "-Xmx32m -Xms32m -XX:HeapBaseMinAddress=3g",  // 3. With user specified HeapBaseMinAddress.
      "-Xmx4g -Xms4g",                              // 4. With larger heap size (UnscaledNarrowOop not possible).
      "-Xmx4g -Xms4g -XX:+UseLargePages",           // 5. Set UseLargePages.
      "-Xmx4g -Xms4g -XX:+UseNUMA"                  // 6. Set UseNUMA.
    };

    for(String extraOpts : extraOptsList) {
      vmOpts.clear();
      if(testVmOpts != null) {
        Collections.addAll(vmOpts, testVmOpts);
      }
      // Add extra options specific to the sub-test.
      String[] extraOptsArray = extraOpts.split(" ");
      if(extraOptsArray != null) {
        Collections.addAll(vmOpts, extraOptsArray);
      }
      // Add common options
      Collections.addAll(vmOpts, new String[] {"-XX:AllocateHeapAt=" + test_dir,
                                               "-Xlog:gc+heap=info",
                                               "-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);
    }
  }
}