Fix issue 571: display descriptive names for code objects from snapshot.

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 98 matching lines @@
  public:
   explicit VMState(StateTag state) {}
 #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(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")      \
   V(CALL_INITIALIZE_TAG,            "CallInitialize",         "ci")       \
   V(CALL_MEGAMORPHIC_TAG,           "CallMegamorphic",        "cmm")      \
   V(CALL_MISS_TAG,                  "CallMiss",               "cm")       \
   V(CALL_NORMAL_TAG,                "CallNormal",             "cn")       \
@@ skipping 88 matching lines @@
   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.
   static void CodeMoveEvent(Address from, Address to);
   // Emits a code delete event.
   static void CodeDeleteEvent(Address from);
 
+  static void SnapshotPositionEvent(Address addr, int pos);
+
   // ==== Events logged by --log-gc. ====
   // Heap sampling events: start, end, and individual types.
   static void HeapSampleBeginEvent(const char* space, const char* kind);
   static void HeapSampleEndEvent(const char* space, const char* kind);
   static void HeapSampleItemEvent(const char* type, int number, int bytes);
   static void HeapSampleJSConstructorEvent(const char* constructor,
                                            int number, int bytes);
   static void HeapSampleJSRetainersEvent(const char* constructor,
                                          const char* event);
   static void HeapSampleJSProducerEvent(const char* constructor,
@@ skipping 125 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_