Adding 'isolates' argument to LOG to get rid of multiple TLS fetches in profiling.

src/top.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 447 matching lines @@
   Object* fun_obj = AccessCheckInfo::cast(data_obj)->named_callback();
   v8::NamedSecurityCallback callback =
       v8::ToCData<v8::NamedSecurityCallback>(fun_obj);
 
   if (!callback) return false;
 
   HandleScope scope(this);
   Handle<JSObject> receiver_handle(receiver, this);
   Handle<Object> key_handle(key, this);
   Handle<Object> data(AccessCheckInfo::cast(data_obj)->data(), this);
-  LOG(ApiNamedSecurityCheck(key));
+  LOG(this, ApiNamedSecurityCheck(key));
   bool result = false;
   {
     // Leaving JavaScript.
     VMState state(this, EXTERNAL);
     result = callback(v8::Utils::ToLocal(receiver_handle),
                       v8::Utils::ToLocal(key_handle),
                       type,
                       v8::Utils::ToLocal(data));
   }
   return result;
@@ skipping 21 matching lines @@
 
   Object* fun_obj = AccessCheckInfo::cast(data_obj)->indexed_callback();
   v8::IndexedSecurityCallback callback =
       v8::ToCData<v8::IndexedSecurityCallback>(fun_obj);
 
   if (!callback) return false;
 
   HandleScope scope(this);
   Handle<JSObject> receiver_handle(receiver, this);
   Handle<Object> data(AccessCheckInfo::cast(data_obj)->data(), this);
-  LOG(ApiIndexedSecurityCheck(index));
+  LOG(this, ApiIndexedSecurityCheck(index));
   bool result = false;
   {
     // Leaving JavaScript.
     VMState state(this, EXTERNAL);
     result = callback(v8::Utils::ToLocal(receiver_handle),
                       index,
                       type,
                       v8::Utils::ToLocal(data));
   }
   return result;
@@ skipping 455 matching lines @@
   thread_local_top()->simulator_ = Simulator::current(this);
 #endif
 #endif
   if (RuntimeProfiler::IsEnabled() && current_vm_state() == JS) {
     RuntimeProfiler::IsolateEnteredJS(this);
   }
   return from + sizeof(ThreadLocalTop);
 }
 
 } }  // namespace v8::internal