Refactored the code for handling debug step in in the runtime system into one...

src/ic.cc

 // 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 334 matching lines @@
     // Ignored this will degrade performance for Array.prototype.{push,pop}.
     // Please note we only return the optimized function iff
     // the JSObject has FastElements.
     if (object->IsJSObject() && JSObject::cast(*object)->HasFastElements()) {
       Object* opt = Top::LookupSpecialFunction(JSObject::cast(*object),
                                                lookup.holder(),
                                                JSFunction::cast(result));
       if (opt->IsJSFunction()) return opt;
     }
 
-    // If performing debug step into then flood this function with one-shot
-    // break points if it is called from where step into was requested.
-    if (Debug::StepInActive() && fp() == Debug::step_in_fp()) {
+    // Handle stepping into a function if step into is active.
+    if (Debug::StepInActive()) {
       // Protect the result in a handle as the debugger can allocate and might
       // cause GC.
       HandleScope scope;
-      Handle<Object> result_handle(result);
-      // Don't allow step into functions in the native context.
-      if (JSFunction::cast(result)->context()->global() !=
-          Top::context()->builtins()) {
-        Handle<SharedFunctionInfo> shared(JSFunction::cast(result)->shared());
-        Debug::FloodWithOneShot(shared);
-      }
-      return *result_handle;
+      Handle<JSFunction> function(JSFunction::cast(result));
+      Debug::HandleStepIn(function, fp(), false);
+      return *function;
     }
 
     return result;
   }
 
   // Try to find a suitable function delegate for the object at hand.
   result = TryCallAsFunction(result);
   return result->IsJSFunction() ?
       result : TypeError("property_not_function", object, name);
 }
@@ skipping 821 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal