Correctly report callstack when current function is FunctionCall builtin

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 102 matching lines @@
   INLINE(void set_shared_id(int shared_id)) { shared_id_ = shared_id; }
   INLINE(int security_token_id() const) { return security_token_id_; }
 
   INLINE(static bool is_js_function_tag(Logger::LogEventsAndTags tag));
 
   List<OffsetRange>* no_frame_ranges() const { return no_frame_ranges_; }
   void set_no_frame_ranges(List<OffsetRange>* ranges) {
     no_frame_ranges_ = ranges;
   }
 
+  void SetBuiltinId(Builtins::Name id);
+  Builtins::Name builtin_id() const { return builtin_id_; }
+
   void CopyData(const CodeEntry& source);
   uint32_t GetCallUid() const;
   bool IsSameAs(CodeEntry* entry) const;
 
   static const char* const kEmptyNamePrefix;
   static const char* const kEmptyResourceName;
 
  private:
-  Logger::LogEventsAndTags tag_;
+  Logger::LogEventsAndTags tag_ : 8;
+  Builtins::Name builtin_id_ : 8;
   const char* name_prefix_;
   const char* name_;
   const char* resource_name_;
   int line_number_;
   int shared_id_;
   int security_token_id_;
   List<OffsetRange>* no_frame_ranges_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeEntry);
 };
@@ skipping 273 matching lines @@
   INLINE(CodeMap* code_map()) { return &code_map_; }
 
   INLINE(void Tick()) { sample_rate_calc_.Tick(); }
   INLINE(double actual_sampling_rate()) {
     return sample_rate_calc_.ticks_per_ms();
   }
 
   static const char* const kAnonymousFunctionName;
   static const char* const kProgramEntryName;
   static const char* const kGarbageCollectorEntryName;
+  // Used to represent frames for which we have no reliable way to
+  // detect function.
+  static const char* const kUnresolvedFunctionName;
 
  private:
   INLINE(CodeEntry* EntryForVMState(StateTag tag));
 
   CpuProfilesCollection* profiles_;
   CodeMap code_map_;
   CodeEntry* program_entry_;
   CodeEntry* gc_entry_;
+  CodeEntry* unresolved_entry_;
   SampleRateCalculator sample_rate_calc_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_