test/jdk/java/util/concurrent/forkjoin/FJExceptionTableLeak.java

8246585: ForkJoin updates
Reviewed-by: martin

*** 60,74 ****
  import java.util.function.BooleanSupplier;
  
  @Test
  public class FJExceptionTableLeak {
      final ThreadLocalRandom rnd = ThreadLocalRandom.current();
!     final VarHandle NEXT, EX;
!     final Object[] exceptionTable;
!     final ReentrantLock exceptionTableLock;
  
!     FJExceptionTableLeak() throws ReflectiveOperationException {
          MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(
              ForkJoinTask.class, MethodHandles.lookup());
          Class<?> nodeClass = Class.forName(
              ForkJoinTask.class.getName() + "$ExceptionNode");
          VarHandle exceptionTableHandle = lookup.findStaticVarHandle(
--- 60,78 ----
  import java.util.function.BooleanSupplier;
  
  @Test
  public class FJExceptionTableLeak {
      final ThreadLocalRandom rnd = ThreadLocalRandom.current();
!     VarHandle NEXT, EX;
!     Object[] exceptionTable;
!     ReentrantLock exceptionTableLock;
  
!     FJExceptionTableLeak() {
!         // initialize separately to allow to pass with FJ versions without table
!     }
! 
!     void init() throws ReflectiveOperationException {
          MethodHandles.Lookup lookup = MethodHandles.privateLookupIn(
              ForkJoinTask.class, MethodHandles.lookup());
          Class<?> nodeClass = Class.forName(
              ForkJoinTask.class.getName() + "$ExceptionNode");
          VarHandle exceptionTableHandle = lookup.findStaticVarHandle(
*** 113,122 ****
--- 117,131 ----
          }
      }
  
      @Test
      public void exceptionTableCleanup() throws Exception {
+         try {
+             init();
+         } catch (ReflectiveOperationException ex) {
+             return; // using FJ Version without Exception table
+         }
          ArrayList<FailingTask> failedTasks = failedTasks();
  
          // Retain a strong ref to one last failing task
          FailingTask lastTask = failedTasks.get(rnd.nextInt(failedTasks.size()));