V8 Microtask Queue & API

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index bfbe558c89f27f52064ff284ae63807dbabd8013..535c99e4dcd993ff20470e013dca75423d7fcf1e 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -3274,6 +3274,15 @@ 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;
   }