CPU profiler: sample call stack on profiling start.

src/profile-generator.h

 // Copyright 2010 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 242 matching lines @@
   CpuProfile* StopProfiling(int security_token_id,
                             const char* title,
                             double actual_sampling_rate);
   CpuProfile* StopProfiling(int security_token_id,
                             String* title,
                             double actual_sampling_rate);
   List<CpuProfile*>* Profiles(int security_token_id);
   CpuProfile* GetProfile(int security_token_id, unsigned uid);
   inline bool is_last_profile();
 
+  const char* GetName(String* name);
   CodeEntry* NewCodeEntry(Logger::LogEventsAndTags tag,
                           String* name, String* resource_name, int line_number);
   CodeEntry* NewCodeEntry(Logger::LogEventsAndTags tag, const char* name);
   CodeEntry* NewCodeEntry(Logger::LogEventsAndTags tag,
                           const char* name_prefix, String* name);
   CodeEntry* NewCodeEntry(Logger::LogEventsAndTags tag, int args_count);
   CodeEntry* NewCodeEntry(int security_token_id);
 
   // Called from profile generator thread.
   void AddPathToCurrentProfiles(const Vector<CodeEntry*>& path);
 
  private:
   INLINE(const char* GetFunctionName(String* name));
   INLINE(const char* GetFunctionName(const char* name));
-  const char* GetName(String* name);
   const char* GetName(int args_count);
   List<CpuProfile*>* GetProfilesList(int security_token_id);
   int TokenToIndex(int security_token_id);
 
   INLINE(static bool StringsMatch(void* key1, void* key2)) {
     return strcmp(reinterpret_cast<char*>(key1),
                   reinterpret_cast<char*>(key2)) == 0;
   }
 
   INLINE(static bool UidsMatch(void* key1, void* key2)) {
@@ skipping 107 matching lines @@
   SampleRateCalculator sample_rate_calc_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileGenerator);
 };
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 #endif  // V8_PROFILE_GENERATOR_H_