V8 Microtask Queue & API

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index dfe98ec080c38009871c4f2357d532e5ec8d40d1..4e6ca03ce42d29c70ed654dceeb7a89a969796e5 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -3269,6 +3269,15 @@ bool Heap::CreateInitialObjects() {
   }
   set_observation_state(JSObject::cast(obj));
 
+  // Allocate object to hold object microtask state.
+  { MaybeObject* maybe_obj = AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  { MaybeObject* maybe_obj = AllocateJSObjectFromMap(Map::cast(obj));
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  set_microtask_state(JSObject::cast(obj));
+
   { MaybeObject* maybe_obj = AllocateSymbol();
     if (!maybe_obj->ToObject(&obj)) return false;
   }