src/hotspot/share/gc/z/zMark.cpp

concurrent root iterator v2

concurrent root iterator

 
   // Free remaining stacks
   stacks->free(&_allocator);
 }
 
+class ZMarkConcurrentRootsTask : public ZTask {
+private:
+  ZMark* const             _mark;
+  ZConcurrentRootsIterator _roots;
+
+public:
+  ZMarkConcurrentRootsTask(ZMark* mark) :
+      ZTask("ZMarkConcurrentRootsTask"),
+      _mark(mark),
+      _roots() {}
+
+  virtual void work() {
+    ZMarkBarrierOopClosure<false /* finalizable */> cl;
+    _roots.oops_do(&cl);
+  }
+};
+
 class ZMarkTask : public ZTask {
 private:
   ZMark* const   _mark;
   const uint64_t _timeout_in_millis;
 

@@ -602,11 +619,16
   virtual void work() {
     _mark->work(_timeout_in_millis);
   }
 };
 
-void ZMark::mark() {
+void ZMark::mark(bool initial) {
+  if (initial) {
+    ZMarkConcurrentRootsTask task(this);
+    _workers->run_concurrent(&task);
+  }
+
   ZMarkTask task(this);
   _workers->run_concurrent(&task);
 }
 
 bool ZMark::try_complete() {