[Tracing] Use TracingCategoryObserver in runtime statistics

src/log.cc

 // Copyright 2011 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.
 
 #include "src/log.h"
 
 #include <cstdarg>
 #include <memory>
 #include <sstream>
 
+#include "include/v8-tracing.h"
 #include "src/bailout-reason.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/counters.h"
 #include "src/deoptimizer.h"
 #include "src/global-handles.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/interpreter/interpreter.h"
 #include "src/libsampler/sampler.h"
@@ skipping 1255 matching lines @@
   RuntimeCallCounter* counter = timer->counter();
   if (counter == nullptr) return;
   Log::MessageBuilder msg(log_);
   msg.Append("active-runtime-timer,");
   msg.AppendDoubleQuotedString(counter->name);
   msg.WriteToLogFile();
 }
 
 void Logger::TickEvent(v8::TickSample* sample, bool overflow) {
   if (!log_->IsEnabled() || !FLAG_prof_cpp) return;
-  if (FLAG_runtime_call_stats) {
+  if (V8_UNLIKELY(FLAG_runtime_stats ==

[alph, 2016/10/31 20:43:54]

ditto

[lpy, 2016/10/31 20:54:19]

No we don't want to print counters if tracing is enabled, tracing will have a
higher priority, that means when tracing and command line are enabled, we ignore
command line.

+                  v8::tracing::TracingCategoryObserver::ENABLED_BY_NATIVE)) {
     RuntimeCallTimerEvent();
   }
   Log::MessageBuilder msg(log_);
   msg.Append("%s,", kLogEventsNames[CodeEventListener::TICK_EVENT]);
   msg.AppendAddress(reinterpret_cast<Address>(sample->pc));
   msg.Append(",%d", static_cast<int>(timer_.Elapsed().InMicroseconds()));
   if (sample->has_external_callback) {
     msg.Append(",1,");
     msg.AppendAddress(
         reinterpret_cast<Address>(sample->external_callback_entry));
@@ skipping 480 matching lines @@
 
   if (profiler_listener_.get() != nullptr) {
     removeCodeEventListener(profiler_listener_.get());
   }
 
   return log_->Close();
 }
 
 }  // namespace internal
 }  // namespace v8