Allow recording individual samples in addition to the aggregated CPU profiles

src/profile-generator.h

 // Copyright 2011 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 132 matching lines @@
   INLINE(void IncrementSelfTicks()) { ++self_ticks_; }
   INLINE(void IncreaseSelfTicks(unsigned amount)) { self_ticks_ += amount; }
   INLINE(void IncreaseTotalTicks(unsigned amount)) { total_ticks_ += amount; }
 
   INLINE(CodeEntry* entry() const) { return entry_; }
   INLINE(unsigned self_ticks() const) { return self_ticks_; }
   INLINE(unsigned total_ticks() const) { return total_ticks_; }
   INLINE(const List<ProfileNode*>* children() const) { return &children_list_; }
   double GetSelfMillis() const;
   double GetTotalMillis() const;
+  unsigned id() const { return id_; }
 
   void Print(int indent);
 
  private:
   INLINE(static bool CodeEntriesMatch(void* entry1, void* entry2)) {
     return reinterpret_cast<CodeEntry*>(entry1)->IsSameAs(
         reinterpret_cast<CodeEntry*>(entry2));
   }
 
   INLINE(static uint32_t CodeEntryHash(CodeEntry* entry)) {
     return entry->GetCallUid();
   }
 
   ProfileTree* tree_;
   CodeEntry* entry_;
   unsigned total_ticks_;
   unsigned self_ticks_;
   // Mapping from CodeEntry* to ProfileNode*
   HashMap children_;
   List<ProfileNode*> children_list_;
+  unsigned id_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileNode);
 };
 
 
 class ProfileTree {
  public:
   ProfileTree();
   ~ProfileTree();
 
-  void AddPathFromEnd(const Vector<CodeEntry*>& path);
+  ProfileNode* AddPathFromEnd(const Vector<CodeEntry*>& path);
   void AddPathFromStart(const Vector<CodeEntry*>& path);
   void CalculateTotalTicks();
   void FilteredClone(ProfileTree* src, int security_token_id);
 
   double TicksToMillis(unsigned ticks) const {
     return ticks * ms_to_ticks_scale_;
   }
   ProfileNode* root() const { return root_; }
   void SetTickRatePerMs(double ticks_per_ms);
 
+  unsigned next_node_id() { return next_node_id_++; }
+
   void ShortPrint();
   void Print() {
     root_->Print(0);
   }
 
  private:
   template <typename Callback>
   void TraverseDepthFirst(Callback* callback);
 
   CodeEntry root_entry_;
+  unsigned next_node_id_;
   ProfileNode* root_;
   double ms_to_ticks_scale_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileTree);
 };
 
 
 class CpuProfile {
  public:
-  CpuProfile(const char* title, unsigned uid)
-      : title_(title), uid_(uid) { }
+  CpuProfile(const char* title, unsigned uid, bool record_samples)
+      : title_(title), uid_(uid), record_samples_(record_samples) { }
 
   // Add pc -> ... -> main() call path to the profile.
   void AddPath(const Vector<CodeEntry*>& path);
   void CalculateTotalTicks();
   void SetActualSamplingRate(double actual_sampling_rate);
   CpuProfile* FilteredClone(int security_token_id);
 
   INLINE(const char* title() const) { return title_; }
   INLINE(unsigned uid() const) { return uid_; }
   INLINE(const ProfileTree* top_down() const) { return &top_down_; }
 
+  INLINE(int samples_count() const) { return samples_.length(); }
+  INLINE(ProfileNode* sample(int index) const) { return samples_.at(index); }
+
   void UpdateTicksScale();
 
   void ShortPrint();
   void Print();
 
  private:
   const char* title_;
   unsigned uid_;
+  bool record_samples_;
+  List<ProfileNode*> samples_;
   ProfileTree top_down_;
 
   DISALLOW_COPY_AND_ASSIGN(CpuProfile);
 };
 
 
 class CodeMap {
  public:
   CodeMap() : next_shared_id_(1) { }
   void AddCode(Address addr, CodeEntry* entry, unsigned size);
@@ skipping 37 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(CodeMap);
 };
 
 
 class CpuProfilesCollection {
  public:
   CpuProfilesCollection();
   ~CpuProfilesCollection();
 
-  bool StartProfiling(const char* title, unsigned uid);
-  bool StartProfiling(String* title, unsigned uid);
+  bool StartProfiling(const char* title, unsigned uid, bool record_samples);
   CpuProfile* StopProfiling(int security_token_id,
                             const char* title,
                             double actual_sampling_rate);
   List<CpuProfile*>* Profiles(int security_token_id);
   const char* GetName(Name* name) {
     return function_and_resource_names_.GetName(name);
   }
   const char* GetName(int args_count) {
     return function_and_resource_names_.GetName(args_count);
   }
@@ skipping 138 matching lines @@
   CodeEntry* gc_entry_;
   SampleRateCalculator sample_rate_calc_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_