j.i.NotSerializableException in JCStress-based test

[Сергей Цыпанов]

Hi, when I run this test

@State
@JCStressTest
@Outcome(id = "java.util.List<java.lang.Integer>", expect = ACCEPTABLE, desc = "Correctly initialized parametrized type observed")
public class GetParametrizedType {
  Value value = new Value();

  @Actor
  public void actor1(L_Result r) {
    r.r1 = value.param.getParameterizedType();
  }

  @Actor
  public void actor2(L_Result r) {
    r.r1 = value.param.getParameterizedType();
  }

  static class Value implements Serializable {

    private final Parameter param;

    Value()  {
      try {
        param = getClass().getMethod("dummy", List.class).getParameters()[0];
      } catch (NoSuchMethodException e) {
        throw new RuntimeException(e);
      }
    }

    public void dummy(List<Integer> param){
    }

    Parameter getParam() {
      return param;
    }
  }
}

I face an exception related to serialization

    java.lang.IllegalStateException: java.io.NotSerializableException: sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl
        at org.openjdk.jcstress.util.Counter.copyOf(Counter.java:228)
        at org.openjdk.jcstress.util.Counter.record(Counter.java:141)
        at org.openjdk.jcstress.util.Counter.record(Counter.java:104)
        at org.sample.GetParametrizedType_jcstress.sanityCheck_API(GetParametrizedType_jcstress.java:54)
        at org.sample.GetParametrizedType_jcstress.sanityCheck(GetParametrizedType_jcstress.java:31)
        at org.openjdk.jcstress.infra.runners.Runner.run(Runner.java:64)
        at org.openjdk.jcstress.ForkedMain.main(ForkedMain.java:79)
    Caused by: java.io.NotSerializableException: sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1202)
        at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1587)
        at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1544)
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1453)
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1196)
        at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:362)
        at org.openjdk.jcstress.util.Counter.copyOf(Counter.java:217)
        ... 6 more


As far as I understand from the sources of JCStress it tries to copy the state and if the latter is represented by non-serializeable object it fails. This can be dodged by changing

r.r1 = value.param.getParameterizedType();

to

r.r1 = value.param.getParameterizedType().toString();

but I don't want to do this because it seems breaking the test.

Is there a way to fix this properly on client side?

Regards,
Sergey Tsypanov