Add support for per-isolate private symbols

src/isolate.cc

 // Copyright 2012 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 2311 matching lines @@
 
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
+
+Handle<JSObject> Isolate::GetSymbolRegistry() {
+  if (heap()->symbol_registry()->IsUndefined()) {
+    Handle<Map> map = factory()->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
+    Handle<JSObject> registry = factory()->NewJSObjectFromMap(map);
+    heap()->set_symbol_registry(*registry);
+
+    static const char* nested[] = {
+      "for", "for_api", "for_intern", "keyFor", "private_api", "private_intern"
+    };
+    for (unsigned i = 0; i < ARRAY_SIZE(nested); ++i) {
+      Handle<String> name = factory()->InternalizeUtf8String(nested[i]);
+      Handle<JSObject> obj = factory()->NewJSObjectFromMap(map);
+      JSObject::NormalizeProperties(obj, KEEP_INOBJECT_PROPERTIES, 8);

[rossberg, 2014/03/24 15:54:47]

Now forcing into dictionary mode.

+      JSObject::SetProperty(registry, name, obj, NONE, STRICT);
+    }
+  }
+  return Handle<JSObject>::cast(factory()->symbol_registry());
+}
+
+
 } }  // namespace v8::internal