Support pass-through of stub caller arguments

src/runtime.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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 60 matching lines @@
 // it in a variable with the given name.  If the object is not of the
 // expected type call IllegalOperation and return.
 #define CONVERT_ARG_CHECKED(Type, name, index)                       \
   RUNTIME_ASSERT(args[index]->Is##Type());                           \
   Type* name = Type::cast(args[index]);
 
 #define CONVERT_ARG_HANDLE_CHECKED(Type, name, index)                \
   RUNTIME_ASSERT(args[index]->Is##Type());                           \
   Handle<Type> name = args.at<Type>(index);
 
+#define CONVERT_ARG_STUB_CALLER_ARGS(name)                           \
+  Arguments* name = reinterpret_cast<Arguments*>(args[0]);
+
 // Cast the given object to a boolean and store it in a variable with
 // the given name.  If the object is not a boolean call IllegalOperation
 // and return.
 #define CONVERT_BOOLEAN_ARG_CHECKED(name, index)                     \
   RUNTIME_ASSERT(args[index]->IsBoolean());                          \
   bool name = args[index]->IsTrue();
 
 // Cast the given argument to a Smi and store its value in an int variable
 // with the given name.  If the argument is not a Smi call IllegalOperation
 // and return.
@@ skipping 13436 matching lines @@
     // 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,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal