Support profiling based on linux kernel performance events.

src/log.h

 // Copyright 2006-2008 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 73 matching lines @@
       v8::internal::Logger::Call;           \
   } while (false)
 #else
 #define LOG(Call) ((void) 0)
 #endif
 
 #define LOG_EVENTS_AND_TAGS_LIST(V) \
   V(CODE_CREATION_EVENT,            "code-creation",          "cc")       \
   V(CODE_MOVE_EVENT,                "code-move",              "cm")       \
   V(CODE_DELETE_EVENT,              "code-delete",            "cd")       \
+  V(CODE_MOVING_GC,                 "code-moving-gc",         "cg")       \
   V(FUNCTION_CREATION_EVENT,        "function-creation",      "fc")       \
   V(FUNCTION_MOVE_EVENT,            "function-move",          "fm")       \
   V(FUNCTION_DELETE_EVENT,          "function-delete",        "fd")       \
   V(SNAPSHOT_POSITION_EVENT,        "snapshot-pos",           "sp")       \
   V(TICK_EVENT,                     "tick",                   "t")        \
   V(REPEAT_META_EVENT,              "repeat",                 "r")        \
   V(BUILTIN_TAG,                    "Builtin",                "bi")       \
   V(CALL_DEBUG_BREAK_TAG,           "CallDebugBreak",         "cdb")      \
   V(CALL_DEBUG_PREPARE_STEP_IN_TAG, "CallDebugPrepareStepIn", "cdbsi")    \
   V(CALL_IC_TAG,                    "CallIC",                 "cic")      \
@@ skipping 98 matching lines @@
   static void CallbackEvent(String* name, Address entry_point);
   static void GetterCallbackEvent(String* name, Address entry_point);
   static void SetterCallbackEvent(String* name, Address entry_point);
   // Emits a code create event.
   static void CodeCreateEvent(LogEventsAndTags tag,
                               Code* code, const char* source);
   static void CodeCreateEvent(LogEventsAndTags tag, Code* code, String* name);
   static void CodeCreateEvent(LogEventsAndTags tag, Code* code, String* name,
                               String* source, int line);
   static void CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count);
+  static void CodeMovingGCEvent();
   // Emits a code create event for a RegExp.
   static void RegExpCodeCreateEvent(Code* code, String* source);
   // Emits a code move event.
   static void CodeMoveEvent(Address from, Address to);
   // Emits a code delete event.
   static void CodeDeleteEvent(Address from);
   // Emits a function object create event.
   static void FunctionCreateEvent(JSFunction* function);
   static void FunctionCreateEventFromMove(JSFunction* function,
                                           HeapObject*);
@@ skipping 88 matching lines @@
 
   // Emits aliases for compressed messages.
   static void LogAliases();
 
   // Emits the source code of a regexp. Used by regexp events.
   static void LogRegExpSource(Handle<JSRegExp> regexp);
 
   // Used for logging stubs found in the snapshot.
   static void LogCodeObject(Object* code_object);
 
+  // Emits general information about generated code.
+  static void LogCodeInfo();
+
+  // Handles code creation when low-level profiling is active.
+  static void LowLevelCodeCreateEvent(Code* code, LogMessageBuilder* msg);
+
   // Emits a profiler tick event. Used by the profiler thread.
   static void TickEvent(TickSample* sample, bool overflow);
 
   static void ApiEvent(const char* name, ...);
 
   // Logs a StringEvent regardless of whether FLAG_log is true.
   static void UncheckedStringEvent(const char* name, const char* value);
 
   // Logs an IntEvent regardless of whether FLAG_log is true.
   static void UncheckedIntEvent(const char* name, int value);
@@ skipping 49 matching lines @@
 // Class that extracts stack trace, used for profiling.
 class StackTracer : public AllStatic {
  public:
   static void Trace(TickSample* sample);
 };
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_