Generator objects have [[Class]] === "Generator"

src/compiler.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
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@@ skipping 1105 matching lines @@
       lit->AllowsLazyCompilationWithoutContext());
   function_info->set_language_mode(lit->language_mode());
   function_info->set_uses_arguments(lit->scope()->arguments() != NULL);
   function_info->set_has_duplicate_parameters(lit->has_duplicate_parameters());
   function_info->set_ast_node_count(lit->ast_node_count());
   function_info->set_is_function(lit->is_function());
   function_info->set_dont_optimize(lit->flags()->Contains(kDontOptimize));
   function_info->set_dont_inline(lit->flags()->Contains(kDontInline));
   function_info->set_dont_cache(lit->flags()->Contains(kDontCache));
   function_info->set_is_generator(lit->is_generator());
+  if (lit->is_generator()) {

[Michael Starzinger, 2013/04/17 12:52:19]

Can we move this into Factory::NewSharedFunctionInfo (the one that takes a code
object)? I think that is a more general chocking point for allocation. Also I
would like to keep this a pure copying function without any logic in it. I am
fine with passing the is_generator flag as a simple boolean flag to
NewSharedFunctionInfo for now.

[wingo, 2013/04/17 14:23:51]

Done.

+    String *class_name = function_info->GetHeap()->Generator_string();
+    function_info->set_instance_class_name(class_name);
+  }
 }
 
 
 void Compiler::RecordFunctionCompilation(Logger::LogEventsAndTags tag,
                                          CompilationInfo* info,
                                          Handle<SharedFunctionInfo> shared) {
   // SharedFunctionInfo is passed separately, because if CompilationInfo
   // was created using Script object, it will not have it.
 
   // Log the code generation. If source information is available include
@@ skipping 23 matching lines @@
     }
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 } }  // namespace v8::internal