Add object hidden properties to heap snapshot

src/heap-snapshot-generator.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1072 matching lines @@
 }
 
 
 void V8HeapExplorer::ExtractJSObjectReferences(
     int entry, JSObject* js_obj) {
   HeapObject* obj = js_obj;
   ExtractClosureReferences(js_obj, entry);
   ExtractPropertyReferences(js_obj, entry);
   ExtractElementReferences(js_obj, entry);
   ExtractInternalReferences(js_obj, entry);
+  ExtractHiddenPropertyReferences(js_obj, entry);
   SetPropertyReference(
       obj, entry, heap_->proto_string(), js_obj->GetPrototype());
   if (obj->IsJSFunction()) {
     JSFunction* js_fun = JSFunction::cast(js_obj);
     Object* proto_or_map = js_fun->prototype_or_initial_map();
     if (!proto_or_map->IsTheHole()) {
       if (!proto_or_map->IsMap()) {
         SetPropertyReference(
             obj, entry,
             heap_->prototype_string(), proto_or_map,
@@ skipping 485 matching lines @@
           continue;
         }
         if (ExtractAccessorPairProperty(js_obj, entry, k, value)) continue;
         SetPropertyReference(js_obj, entry, String::cast(k), value);
       }
     }
   }
 }
 
 
+void V8HeapExplorer::ExtractHiddenPropertyReferences(JSObject* obj, int entry) {
+  if (obj->IsJSGlobalProxy()) {
+    // For a proxy, use the prototype as target object.
+    Object* proxy_parent = obj->GetPrototype();
+    // If the proxy is detached, return undefined.
+    if (proxy_parent->IsNull())
+      return;
+    ASSERT(proxy_parent->IsJSGlobalObject());
+    obj = JSObject::cast(proxy_parent);
+  }
+  ASSERT(!obj->IsJSGlobalProxy());
+  Object* inline_value = obj->GetHiddenPropertiesHashTable();
+  if (!inline_value->IsHashTable())
+    return;
+  ObjectHashTable* hashtable = ObjectHashTable::cast(inline_value);
+  int capacity = hashtable->Capacity();
+  for (int i = 0; i < capacity; i++) {
+    Object* k = hashtable->KeyAt(i);
+    if (!k->IsString()) continue;
+    Object* value = hashtable->Lookup(k);
+    SetPropertyReference(obj, entry, String::cast(k), value);
+  }
+}
+
+
 bool V8HeapExplorer::ExtractAccessorPairProperty(
     JSObject* js_obj, int entry, Object* key, Object* callback_obj) {
   if (!callback_obj->IsAccessorPair()) return false;
   AccessorPair* accessors = AccessorPair::cast(callback_obj);
   Object* getter = accessors->getter();
   if (!getter->IsOddball()) {
     SetPropertyReference(js_obj, entry, String::cast(key), getter, "get %s");
   }
   Object* setter = accessors->setter();
   if (!setter->IsOddball()) {
@@ skipping 1457 matching lines @@
   writer_->AddString("\"<dummy>\"");
   for (int i = 1; i < sorted_strings.length(); ++i) {
     writer_->AddCharacter(',');
     SerializeString(sorted_strings[i]);
     if (writer_->aborted()) return;
   }
 }
 
 
 } }  // namespace v8::internal