test/hotspot/jtreg/vmTestbase/gc/gctests/gctest02/gctest02.java

rev 59093 : [mq]: randomness-code_vmTestbase_gc

@@ -38,10 +38,12 @@
 
 package gc.gctests.gctest02;
 
 import nsk.share.TestFailure;
 import nsk.share.TestBug;
+import nsk.share.test.LocalRandom;
+
 /*  stress testing
  create 16 memory evil threads requesting to allocate
  the object of sizes from 8 to ( 2 ^ 19).
  The live time of objects is random (0 ~ 1000).
  Here we let the threads that reference the objects

@@ -53,24 +55,10 @@
 class PopulationException extends Exception {
     //this exception is used to signal that we've
     //reached the end of the test
 }
 
-//the LocalRandom class is used to isolate the pseudo-random
-//number generator from other parts of the system which might
-//silently be using it.
-//This is to make sure the tests are repeatable
-
-class LocalRandom {
-    public static Random rGen = null;
-
-    public static double random() {
-        //should fail if rGen is not initialized
-        return rGen.nextDouble();
-    }
-}
-
 class ThreadCount {
     static int count= 0;
     static synchronized void inc() { count++; }
     static synchronized void dec() { count --; }
     static synchronized int get() { return count; }

@@ -188,11 +176,10 @@
 
 public class gctest02 {
         public static void main(String args[] ) {
                 int bufsz = 8;
                 int peopleLimit = 1000;
-                long randomSeed = System.currentTimeMillis();
                 Memevil me=null;
                 if (args.length > 0)
                 {
                         try
                         {

@@ -204,28 +191,13 @@
                                         "Bad input to gctest02. Expected integer, got: ->"
                                         + args[0] + "<-", e);
                         }
                 }
 
-                if (args.length == 2)
-                {
-                        try
-                        {
-                                randomSeed = new Long(args[1]).longValue();
-                        }
-                        catch (NumberFormatException e)
-                        {
-                                throw new TestBug(
-                                        "Bad input to gctest02. Expected long, got: ->"
-                                        + args[0] + "<-", e);
-                        }
-                }
                 Person.setPopulationLimit(peopleLimit);
-                System.out.println("Seed value: " + randomSeed);
                 for (int ii=0; ii<40; ii++) {
                         bufsz = 8;
-                        LocalRandom.rGen = new Random(randomSeed);
                         Person.populationCount = 0;
                         Escaper you = new Escaper();
                         you.setName("Escaper");
                         ThreadCount.inc();
                         you.start();