[runtime] Better encapsulation of dictionary objects handling in lookup iterator.

src/objects-printer.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/objects-inl.h"
@@ skipping 977 matching lines @@
   HeapObject::PrintHeader(os, "Cell");
   os << "\n - value: " << Brief(value());
   os << "\n";
 }
 
 
 void PropertyCell::PropertyCellPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "PropertyCell");
   os << "\n - value: " << Brief(value());
   os << "\n - details: " << property_details();
+  PropertyCellType cell_type = property_details().cell_type();
+  os << "\n - cell_type: ";
+  if (value()->IsTheHole(GetIsolate())) {
+    switch (cell_type) {
+      case PropertyCellType::kUninitialized:
+        os << "Uninitialized";
+        break;
+      case PropertyCellType::kInvalidated:
+        os << "Invalidated";
+        break;
+      default:
+        os << "??? " << static_cast<int>(cell_type);
+        break;
+    }
+  } else {
+    switch (cell_type) {
+      case PropertyCellType::kUndefined:
+        os << "Undefined";
+        break;
+      case PropertyCellType::kConstant:
+        os << "Constant";
+        break;
+      case PropertyCellType::kConstantType:
+        os << "ConstantType"
+           << " (";
+        switch (GetConstantType()) {
+          case PropertyCellConstantType::kSmi:
+            os << "Smi";
+            break;
+          case PropertyCellConstantType::kStableMap:
+            os << "StableMap";
+            break;
+        }
+        os << ")";
+        break;
+      case PropertyCellType::kMutable:
+        os << "Mutable";
+        break;
+    }
+  }
   os << "\n";
 }
 
 
 void WeakCell::WeakCellPrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "WeakCell");
   if (cleared()) {
     os << "\n - cleared";
   } else {
     os << "\n - value: " << Brief(value());
@@ skipping 371 matching lines @@
 void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
   Object* transitions = map()->raw_transitions();
   int num_transitions = TransitionArray::NumberOfTransitions(transitions);
   if (num_transitions == 0) return;
   os << "\n - transitions";
   TransitionArray::PrintTransitions(os, transitions, false);
 }
 #endif  // defined(DEBUG) || defined(OBJECT_PRINT)
 }  // namespace internal
 }  // namespace v8