48                 new String[] { "ShenandoahCASBarrier" },
  49                 new String[] { "ShenandoahCloneBarrier" },
  50         };
  51 
  52         int size = 1;
  53         for (String[] l : opts) {
  54             size *= (l.length + 1);
  55         }
  56 
  57         ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
  58 
  59         for (int c = 0; c < size; c++) {
  60             int t = c;
  61 
  62             List<String> conf = new ArrayList<>();
  63             conf.addAll(Arrays.asList(args));
  64             conf.add("-Xmx128m");
  65             conf.add("-XX:+UnlockDiagnosticVMOptions");
  66             conf.add("-XX:+UnlockExperimentalVMOptions");
  67             conf.add("-XX:+UseShenandoahGC");
  68             conf.add("-XX:ShenandoahGCHeuristics=passive");
  69 
  70             StringBuilder sb = new StringBuilder();
  71             for (String[] l : opts) {
  72                 // Make a choice which flag to select from the group.
  73                 // Zero means no flag is selected from the group.
  74                 int choice = t % (l.length + 1);
  75                 for (int e = 0; e < l.length; e++) {
  76                     conf.add("-XX:" + ((choice == (e + 1)) ? "+" : "-") + l[e]);
  77                 }
  78                 t = t / (l.length + 1);
  79             }
  80 
  81             conf.add("TestSelectiveBarrierFlags$Test");
  82 
  83             pool.submit(() -> {
  84                 try {
  85                     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(conf.toArray(new String[0]));
  86                     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  87                     output.shouldHaveExitValue(0);
  88                 } catch (Exception e) {

  48                 new String[] { "ShenandoahCASBarrier" },
  49                 new String[] { "ShenandoahCloneBarrier" },
  50         };
  51 
  52         int size = 1;
  53         for (String[] l : opts) {
  54             size *= (l.length + 1);
  55         }
  56 
  57         ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
  58 
  59         for (int c = 0; c < size; c++) {
  60             int t = c;
  61 
  62             List<String> conf = new ArrayList<>();
  63             conf.addAll(Arrays.asList(args));
  64             conf.add("-Xmx128m");
  65             conf.add("-XX:+UnlockDiagnosticVMOptions");
  66             conf.add("-XX:+UnlockExperimentalVMOptions");
  67             conf.add("-XX:+UseShenandoahGC");
  68             conf.add("-XX:ShenandoahGCMode=passive");
  69 
  70             StringBuilder sb = new StringBuilder();
  71             for (String[] l : opts) {
  72                 // Make a choice which flag to select from the group.
  73                 // Zero means no flag is selected from the group.
  74                 int choice = t % (l.length + 1);
  75                 for (int e = 0; e < l.length; e++) {
  76                     conf.add("-XX:" + ((choice == (e + 1)) ? "+" : "-") + l[e]);
  77                 }
  78                 t = t / (l.length + 1);
  79             }
  80 
  81             conf.add("TestSelectiveBarrierFlags$Test");
  82 
  83             pool.submit(() -> {
  84                 try {
  85                     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(conf.toArray(new String[0]));
  86                     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  87                     output.shouldHaveExitValue(0);
  88                 } catch (Exception e) {