Add logging of callbacks in prof-lazy mode.

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 104 matching lines @@
   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")      \
   V(CALL_INITIALIZE_TAG,            "CallInitialize",         "ci")       \
   V(CALL_MEGAMORPHIC_TAG,           "CallMegamorphic",        "cmm")      \
   V(CALL_MISS_TAG,                  "CallMiss",               "cm")       \
   V(CALL_NORMAL_TAG,                "CallNormal",             "cn")       \
   V(CALL_PRE_MONOMORPHIC_TAG,       "CallPreMonomorphic",     "cpm")      \
+  V(CALLBACK_TAG,                   "Callback",               "cb")       \
   V(EVAL_TAG,                       "Eval",                   "e")        \
   V(FUNCTION_TAG,                   "Function",               "f")        \
   V(KEYED_LOAD_IC_TAG,              "KeyedLoadIC",            "klic")     \
   V(KEYED_STORE_IC_TAG,             "KeyedStoreIC",           "ksic")     \
   V(LAZY_COMPILE_TAG,               "LazyCompile",            "lc")       \
   V(LOAD_IC_TAG,                    "LoadIC",                 "lic")      \
   V(REG_EXP_TAG,                    "RegExp",                 "re")       \
   V(SCRIPT_TAG,                     "Script",                 "sc")       \
   V(STORE_IC_TAG,                   "StoreIC",                "sic")      \
   V(STUB_TAG,                       "Stub",                   "s")
@@ skipping 58 matching lines @@
                                      JSObject* holder,
                                      Object* name);
   static void ApiIndexedPropertyAccess(const char* tag,
                                        JSObject* holder,
                                        uint32_t index);
   static void ApiObjectAccess(const char* tag, JSObject* obj);
   static void ApiEntryCall(const char* name);
 
 
   // ==== Events logged by --log-code. ====
+  // Emits a code event for a callback function.
+  static void CallbackEvent(const char* class_name, const char* method_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);
   // Emits a code create event for a RegExp.
   static void RegExpCodeCreateEvent(Code* code, String* source);
   // Emits a code move event.
@@ skipping 47 matching lines @@
   static int GetActiveProfilerModules();
 
   // If logging is performed into a memory buffer, allows to
   // retrieve previously written messages. See v8.h.
   static int GetLogLines(int from_pos, char* dest_buf, int max_size);
 
   // Logs all compiled functions found in the heap.
   static void LogCompiledFunctions();
   // Used for logging stubs found in the snapshot.
   static void LogCodeObject(Object* code_object);
+  // Used for logging callback entry points to be able to reveal their
+  // names in call stacks when information about native code exports is
+  // inaccessible.
+  static void LogCallbacks();
 
  private:
 
   // Profiler's sampling interval (in milliseconds).
   static const int kSamplingIntervalMs = 1;
 
   // Size of window used for log records compression.
   static const int kCompressionWindowSize = 4;
 
   // Emits the profiler's first message.
@@ skipping 64 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_