Optimizing HandleScope. Also fixed HandleScope destruction when API getter th...

src/handles-inl.h

 // Copyright 2006-2008 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 37 matching lines @@
   ASSERT(location_ != NULL);
   ASSERT(reinterpret_cast<Address>(*location_) != kHandleZapValue);
   return *BitCast<T**>(location_);
 }
 
 
 #ifdef DEBUG
 inline NoHandleAllocation::NoHandleAllocation() {
   v8::ImplementationUtilities::HandleScopeData* current =
       v8::ImplementationUtilities::CurrentHandleScope();
-  extensions_ = current->extensions;
   // Shrink the current handle scope to make it impossible to do
   // handle allocations without an explicit handle scope.
   current->limit = current->next;
-  current->extensions = -1;
+
+  level_ = current->level;
+  current->level = 0;
 }
 
 
 inline NoHandleAllocation::~NoHandleAllocation() {
   // Restore state in current handle scope to re-enable handle
   // allocations.
-  v8::ImplementationUtilities::CurrentHandleScope()->extensions = extensions_;
+  v8::ImplementationUtilities::HandleScopeData* current =
+      v8::ImplementationUtilities::CurrentHandleScope();
+  ASSERT_EQ(0, current->level);
+  current->level = level_;
 }
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HANDLES_INL_H_