--- old/src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp	2020-07-09 14:49:50.760521065 +0800
+++ new/src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp	2020-07-09 14:49:50.600521572 +0800
@@ -539,6 +539,9 @@
   old_gen()->object_iterate(cl);
 }
 
+void ParallelScavengeHeap::run_task(AbstractGangTask* task) {
+  _workers.run_task(task);
+}
 
 HeapWord* ParallelScavengeHeap::block_start(const void* addr) const {
   if (young_gen()->is_in_reserved(addr)) {