Static resolution of outer variables in eval code.

src/runtime.cc

 // Copyright 2011 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 12211 matching lines @@
     isolate->set_context(*top->context());
   }
 
   // Get the global context now set to the top context from before the
   // debugger was invoked.
   Handle<Context> context = isolate->global_context();
 
   bool is_global = true;
 
   if (additional_context->IsJSObject()) {
-    // Create a function context first, than put 'with' context on top of it.
-    Handle<JSFunction> go_between = isolate->factory()->NewFunction(
-        isolate->factory()->empty_string(),
-        isolate->factory()->undefined_value());
-    go_between->set_context(*context);
-    context =
-        isolate->factory()->NewFunctionContext(
-            Context::MIN_CONTEXT_SLOTS, go_between);
-    context->set_extension(JSObject::cast(*additional_context));
+    // Create a new with context with the additional context information between
+    // the context of the debugged function and the eval code to be executed.
+    context = isolate->factory()->NewWithContext(
+        Handle<JSFunction>(context->closure()),
+        context,
+        Handle<JSObject>::cast(additional_context));
     is_global = false;
   }
 
   // Compile the source to be evaluated.
   // Currently, the eval code will be executed in non-strict mode,
   // even in the strict code context.
   Handle<SharedFunctionInfo> shared =
       Compiler::CompileEval(source,
                             context,
                             is_global,
@@ skipping 1327 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags);
   }
 }
 
 
 } }  // namespace v8::internal