src/hotspot/share/gc/shared/gcConfiguration.cpp

*** 41,50 ****
--- 41,54 ----
  
    if (UseConcMarkSweepGC) {
      return ParNew;
    }
  
+   if (UseZGC) {
+     return NA;
+   }
+ 
    return DefNew;
  }
  
  GCName GCConfiguration::old_collector() const {
    if (UseG1GC) {
*** 57,66 ****
--- 61,74 ----
  
    if (UseParallelOldGC) {
      return ParallelOld;
    }
  
+   if (UseZGC) {
+     return Z;
+   }
+ 
    return SerialOld;
  }
  
  uint GCConfiguration::num_parallel_gc_threads() const {
    return ParallelGCThreads;