[--prof] Adding support for RuntimeCallTimerScope based tick separation

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 <sstream>
 
 #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/v8-sampler.h"
 #include "src/log-inl.h"
 #include "src/log-utils.h"
 #include "src/macro-assembler.h"
 #include "src/perf-jit.h"
 #include "src/profiler/cpu-profiler-inl.h"
@@ skipping 1392 matching lines @@
     s.AddCharacter(static_cast<char>(parameter[i]));
   }
   char* parameter_string = s.Finalize();
   Log::MessageBuilder msg(log_);
   msg.Append("debug-queue-event,%s,%15.3f,%s", event_type,
              base::OS::TimeCurrentMillis(), parameter_string);
   DeleteArray(parameter_string);
   msg.WriteToLogFile();
 }
 
+void Logger::RuntimeCallTimerEvent() {
+  RuntimeCallStats* stats = isolate_->counters()->runtime_call_stats();
+  RuntimeCallTimer* timer = stats->current_timer();
+  if (timer == nullptr) return;
+  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(TickSample* sample, bool overflow) {
   if (!log_->IsEnabled() || !FLAG_prof_cpp) return;
+  if (FLAG_runtime_call_stats) {
+    RuntimeCallTimerEvent();
+  }
   Log::MessageBuilder msg(log_);
   msg.Append("%s,", kLogEventsNames[TICK_EVENT]);
   msg.AppendAddress(sample->pc);
   msg.Append(",%d", static_cast<int>(timer_.Elapsed().InMicroseconds()));
   if (sample->has_external_callback) {
     msg.Append(",1,");
     msg.AppendAddress(sample->external_callback_entry);
   } else {
     msg.Append(",0,");
     msg.AppendAddress(sample->tos);
@@ skipping 456 matching lines @@
     removeCodeEventListener(jit_logger_);
     delete jit_logger_;
     jit_logger_ = NULL;
   }
 
   return log_->Close();
 }
 
 }  // namespace internal
 }  // namespace v8