src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/phases/WriteBarrierAdditionPhase.java

*** 75,93 ****
          return false;
      }
  
      private BarrierSet createBarrierSet(GraalHotSpotVMConfig config) {
          if (config.useG1GC) {
!             return createG1BarrierSet();
          } else {
!             return createCardTableBarrierSet();
          }
      }
  
!     protected BarrierSet createCardTableBarrierSet() {
!         return new CardTableBarrierSet();
      }
  
!     protected BarrierSet createG1BarrierSet() {
!         return new G1BarrierSet();
      }
  }
--- 75,93 ----
          return false;
      }
  
      private BarrierSet createBarrierSet(GraalHotSpotVMConfig config) {
          if (config.useG1GC) {
!             return createG1BarrierSet(config);
          } else {
!             return createCardTableBarrierSet(config);
          }
      }
  
!     protected BarrierSet createCardTableBarrierSet(GraalHotSpotVMConfig config) {
!         return new CardTableBarrierSet(config);
      }
  
!     protected BarrierSet createG1BarrierSet(GraalHotSpotVMConfig config) {
!         return new G1BarrierSet(config);
      }
  }