[counters] Making counter properly reentrant.

src/arguments.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARGUMENTS_H_
 #define V8_ARGUMENTS_H_
 
 #include "src/allocation.h"
 #include "src/isolate.h"
 
@@ skipping 257 matching lines @@
 #ifdef DEBUG
 #define CLOBBER_DOUBLE_REGISTERS() ClobberDoubleRegisters(1, 2, 3, 4);
 #else
 #define CLOBBER_DOUBLE_REGISTERS()
 #endif
 
 #define RUNTIME_FUNCTION_RETURNS_TYPE(Type, Name)                          \
   static INLINE(Type __RT_impl_##Name(Arguments args, Isolate* isolate));  \
   Type Name(int args_length, Object** args_object, Isolate* isolate) {     \
     CLOBBER_DOUBLE_REGISTERS();                                            \
-    base::ElapsedTimer timer;                                              \
     if (FLAG_runtime_call_stats) {                                         \
       RuntimeCallStats* stats = isolate->counters()->runtime_call_stats(); \
       stats->Enter(&stats->Name);                                          \
-      timer.Start();                                                       \
     }                                                                      \
     Arguments args(args_length, args_object);                              \
     Type value = __RT_impl_##Name(args, isolate);                          \
     if (FLAG_runtime_call_stats) {                                         \
-      isolate->counters()->runtime_call_stats()->Leave(timer.Elapsed());   \
+      isolate->counters()->runtime_call_stats()->Leave();                  \
     }                                                                      \
     return value;                                                          \
   }                                                                        \
   static Type __RT_impl_##Name(Arguments args, Isolate* isolate)
 
 #define RUNTIME_FUNCTION(Name) RUNTIME_FUNCTION_RETURNS_TYPE(Object*, Name)
 #define RUNTIME_FUNCTION_RETURN_PAIR(Name) \
     RUNTIME_FUNCTION_RETURNS_TYPE(ObjectPair, Name)
 #define RUNTIME_FUNCTION_RETURN_TRIPLE(Name) \
     RUNTIME_FUNCTION_RETURNS_TYPE(ObjectTriple, Name)
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARGUMENTS_H_