Count-based profiling for primitive functions (hidden behind a flag)

src/runtime-profiler.h

-// Copyright 2010 the V8 project authors. All rights reserved.
+// 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
 //       with the distribution.
@@ skipping 42 matching lines @@
 
   void NotifyTick();
 
   void SetUp();
   void Reset();
   void TearDown();
 
   Object** SamplerWindowAddress();
   int SamplerWindowSize();
 
+  void NotifyICChanged() { any_ic_changed_ = true; }
+
+  void NotifyCodeGenerated(int generated_code_size) {
+    if (FLAG_counting_profiler) {
+      code_generated_ = true;
+      total_code_generated_ += generated_code_size;
+    }
+  }
+
   // Rate limiting support.
 
   // VM thread interface.
   //
   // Called by isolates when their states change.
   static inline void IsolateEnteredJS(Isolate* isolate);
   static inline void IsolateExitedJS(Isolate* isolate);
 
   // Profiler thread interface.
   //
@@ skipping 16 matching lines @@
 
   void UpdateSamplesAfterScavenge();
   void RemoveDeadSamples();
   void UpdateSamplesAfterCompact(ObjectVisitor* visitor);
 
  private:
   static const int kSamplerWindowSize = 16;
 
   static void HandleWakeUp(Isolate* isolate);
 
-  void Optimize(JSFunction* function);
+  void Optimize(JSFunction* function, const char* reason);
 
   void AttemptOnStackReplacement(JSFunction* function);
 
   void ClearSampleBuffer();
 
   void ClearSampleBufferNewSpaceEntries();
 
   int LookupSample(JSFunction* function);
 
   void AddSample(JSFunction* function, int weight);
 
   Isolate* isolate_;
 
   int sampler_threshold_;
   int sampler_threshold_size_factor_;
   int sampler_ticks_until_threshold_adjustment_;
 
   Object* sampler_window_[kSamplerWindowSize];
   int sampler_window_position_;
   int sampler_window_weight_[kSamplerWindowSize];
 
+  bool any_ic_changed_;
+  bool code_generated_;
+  int total_code_generated_;
+
   // Possible state values:
   //   -1            => the profiler thread is waiting on the semaphore
   //   0 or positive => the number of isolates running JavaScript code.
   static Atomic32 state_;
   static Semaphore* semaphore_;
 
 #ifdef DEBUG
   static bool has_been_globally_set_up_;
 #endif
   static bool enabled_;
@@ skipping 34 matching lines @@
 
 void RuntimeProfiler::IsolateExitedJS(Isolate* isolate) {
   Atomic32 new_state = NoBarrier_AtomicIncrement(&state_, -1);
   ASSERT(new_state >= 0);
   USE(new_state);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_PROFILER_H_