Property reconfiguring implemented. Tests added.

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/v8.h"
 
 #include "src/disasm.h"
 #include "src/disassembler.h"
 #include "src/heap/objects-visiting.h"
 #include "src/jsregexp.h"
@@ skipping 424 matching lines @@
     os << "\n - transitions: " << Brief(transitions());
   }
   os << "\n - prototype: " << Brief(prototype());
   os << "\n - constructor: " << Brief(constructor());
   os << "\n - code cache: " << Brief(code_cache());
   os << "\n - dependent code: " << Brief(dependent_code());
   os << "\n";
 }
 
 
+// TODO(ishell): Move prototype transitions to separate class.
+void Map::PrintPrototypeTransitions(std::ostream& os) {  // NOLINT
+  FixedArray* cache = GetPrototypeTransitions();
+  int number_of_transitions = NumberOfProtoTransitions();
+  os << "Prototype transition array " << number_of_transitions << "\n";
+  const int proto_offset =
+      kProtoTransitionHeaderSize + kProtoTransitionPrototypeOffset;
+  const int map_offset = kProtoTransitionHeaderSize + kProtoTransitionMapOffset;
+  const int step = kProtoTransitionElementsPerEntry;
+  for (int i = 0; i < number_of_transitions; i++) {
+    Object* prototype = cache->get(proto_offset + i * step);
+    Object* map = cache->get(map_offset + i * step);
+    os << "   " << Brief(prototype) << " -> " << Brief(map) << "\n";
+  }
+  os << "\n";
+}
+
+
 void CodeCache::CodeCachePrint(std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "CodeCache");
   os << "\n - default_cache: " << Brief(default_cache());
   os << "\n - normal_type_cache: " << Brief(normal_type_cache());
 }
 
 
 void PolymorphicCodeCache::PolymorphicCodeCachePrint(
     std::ostream& os) {  // NOLINT
   HeapObject::PrintHeader(os, "PolymorphicCodeCache");
@@ skipping 729 matching lines @@
   }
 }
 
 
 void JSObject::PrintTransitions(std::ostream& os) {  // NOLINT
   if (!map()->HasTransitionArray()) return;
   map()->transitions()->PrintTransitions(os, false);
 }
 #endif  // defined(DEBUG) || defined(OBJECT_PRINT)
 } }  // namespace v8::internal