Add a new API V8::SetJitCodeEventHandler to push code name and location to users such as profilers.

src/log.h

 // 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
@@ skipping 68 matching lines @@
 
 #undef LOG
 #define LOG(isolate, Call)                          \
   do {                                              \
     v8::internal::Logger* logger =                  \
         (isolate)->logger();                        \
     if (logger->is_logging())                       \
       logger->Call;                                 \
   } while (false)
 
+#define LOG_CODE_EVENT(isolate, Call)               \
+  do {                                              \
+    v8::internal::Logger* logger =                  \
+        (isolate)->logger();                        \
+    if (logger->is_logging_code_events())           \
+      logger->Call;                                 \
+  } while (false)
+
+
 #define LOG_EVENTS_AND_TAGS_LIST(V)                                     \
   V(CODE_CREATION_EVENT,            "code-creation")                    \
   V(CODE_MOVE_EVENT,                "code-move")                        \
   V(CODE_DELETE_EVENT,              "code-delete")                      \
   V(CODE_MOVING_GC,                 "code-moving-gc")                   \
   V(SHARED_FUNC_MOVE_EVENT,         "sfi-move")                         \
   V(SNAPSHOT_POSITION_EVENT,        "snapshot-pos")                     \
   V(SNAPSHOT_CODE_NAME_EVENT,       "snapshot-code-name")               \
   V(TICK_EVENT,                     "tick")                             \
   V(REPEAT_META_EVENT,              "repeat")                           \
@@ skipping 45 matching lines @@
 #define DECLARE_ENUM(enum_item, ignore) enum_item,
   enum LogEventsAndTags {
     LOG_EVENTS_AND_TAGS_LIST(DECLARE_ENUM)
     NUMBER_OF_LOG_EVENTS
   };
 #undef DECLARE_ENUM
 
   // Acquires resources for logging if the right flags are set.
   bool SetUp();
 
+  // Sets the current code event handler.
+  void SetCodeEventHandler(uint32_t options,
+                           JitCodeEventHandler event_handler);
+
   void EnsureTickerStarted();
   void EnsureTickerStopped();
 
   Sampler* sampler();
 
   // Frees resources acquired in SetUp.
   // When a temporary file is used for the log, returns its stream descriptor,
   // leaving the file open.
   FILE* TearDown();
 
@@ skipping 103 matching lines @@
 
   void RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache);
 
   // Log an event reported from generated code
   void LogRuntime(Vector<const char> format, JSArray* args);
 
   bool is_logging() {
     return logging_nesting_ > 0;
   }
 
+  bool is_logging_code_events() {
+    return is_logging() || code_event_handler_ != NULL;
+  }
+
   // Pause/Resume collection of profiling data.
   // When data collection is paused, CPU Tick events are discarded until
   // data collection is Resumed.
   void PauseProfiler();
   void ResumeProfiler();
   bool IsProfilerPaused();
 
   void LogExistingFunction(Handle<SharedFunctionInfo> shared,
                            Handle<Code> code);
   // Logs all compiled functions found in the heap.
@@ skipping 18 matching lines @@
   // Callback from Log, stops profiling in case of insufficient resources.
   void LogFailure();
 
  private:
   class NameBuffer;
   class NameMap;
 
   Logger();
   ~Logger();
 
+  // Issue code notifications.
+  void IssueCodeAddedEvent(Code* code, const char* name, size_t name_len);
+  void IssueCodeMovedEvent(Address from, Address to);
+  void IssueCodeRemovedEvent(Address from);
+
   // Emits the profiler's first message.
   void ProfilerBeginEvent();
 
   // Emits callback event messages.
   void CallbackEventInternal(const char* prefix,
                              const char* name,
                              Address entry_point);
 
   // Internal configurable move event.
   void MoveEventInternal(LogEventsAndTags event, Address from, Address to);
@@ skipping 81 matching lines @@
   Log* log_;
 
   NameBuffer* name_buffer_;
 
   NameMap* address_to_name_map_;
 
   // Guards against multiple calls to TearDown() that can happen in some tests.
   // 'true' between SetUp() and TearDown().
   bool is_initialized_;
 
+  // The code event handler - if any.
+  JitCodeEventHandler code_event_handler_;
+
   // Support for 'incremental addresses' in compressed logs:
   //  LogMessageBuilder::AppendAddress(Address addr)
   Address last_address_;
   //  Logger::TickEvent(...)
   Address prev_sp_;
   Address prev_function_;
   //  Logger::MoveEventInternal(...)
   Address prev_to_;
   //  Logger::FunctionCreateEvent(...)
   Address prev_code_;
@@ skipping 39 matching lines @@
 // Class that extracts stack trace, used for profiling.
 class StackTracer : public AllStatic {
  public:
   static void Trace(Isolate* isolate, TickSample* sample);
 };
 
 } }  // namespace v8::internal
 
 
 #endif  // V8_LOG_H_