- Get handle vtable from a static table for predefined classes.

runtime/vm/class_table.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/class_table.h"
 #include "vm/flags.h"
 #include "vm/object.h"
 #include "vm/raw_object.h"
 #include "vm/visitor.h"
 
@@ skipping 29 matching lines @@
 
 
 void ClassTable::Register(const Class& cls) {
   intptr_t index = cls.id();
   if (index != kIllegalObjectKind) {
     ASSERT(index > 0);
     ASSERT(index < kNumPredefinedKinds);
     ASSERT(table_[index] == 0);
     ASSERT(index < capacity_);
     table_[index] = cls.raw();
+    // Add the vtable for this predefined class into the static vtable registry
+    // if it has not been setup yet.
+    cpp_vtable cls_vtable = cls.handle_vtable();
+    cpp_vtable table_entry = Object::builtin_vtables_[index];
+    ASSERT((table_entry == 0) || (table_entry == cls_vtable));
+    if (table_entry == 0) {
+      Object::builtin_vtables_[index] = cls_vtable;
+    }
   } else {
     if (top_ == capacity_) {
       // Grow the capacity of the class table.
       intptr_t new_capacity = capacity_ + capacity_increment_;
       RawClass** new_table = reinterpret_cast<RawClass**>(
           realloc(table_, new_capacity * sizeof(RawClass*)));  // NOLINT
       for (intptr_t i = capacity_; i < new_capacity; i++) {
         new_table[i] = NULL;
       }
       capacity_ = new_capacity;
@@ skipping 20 matching lines @@
   for (intptr_t i = 1; i < top_; i++) {
     cls = At(i);
     if (cls.raw() != reinterpret_cast<RawClass*>(0)) {
       name = cls.Name();
       OS::Print("%d: %s\n", i, name.ToCString());
     }
   }
 }
 
 }  // namespace dart