This patch is the propagation version of https://codereview.chromium.org/10824032 patch

src/log.h

Index: src/log.h
===================================================================
--- src/log.h	(revision 13614)
+++ src/log.h	(working copy)
@@ -76,6 +76,7 @@
 class Semaphore;
 class Ticker;
 class Isolate;
+class PositionsRecorder;
 
 #undef LOG
 #define LOG(isolate, Call)                          \
@@ -246,6 +247,19 @@
   void CodeMoveEvent(Address from, Address to);
   // Emits a code delete event.
   void CodeDeleteEvent(Address from);
+  // Emits a code line info add event with Postion type.
+  void CodeLinePosInfoAddPositionEvent(void* jit_handler_data,
+                                       int pc_offset,
+                                       int position);
+  // Emits a code line info add event with StatementPostion type.
+  void CodeLinePosInfoAddStatementPositionEvent(void* jit_handler_data,
+                                                int pc_offset,
+                                                int position);
+  // Emits a code line info start to record event
+  void CodeStartLinePosInfoRecordEvent(PositionsRecorder* pos_recorder);
+  // Emits a code line info finish record event.
+  // It's the callee's responsibility to dispose the parameter jit_handler_data.
+  void CodeEndLinePosInfoRecordEvent(Code* code, void* jit_handler_data);
 
   void SharedFunctionInfoMoveEvent(Address from, Address to);
 
@@ -316,6 +330,10 @@
     return logging_nesting_ > 0;
   }
 
+  bool is_code_event_handler_enabled() {
+    return code_event_handler_ != NULL;
+  }
+
   bool is_logging_code_events() {
     return is_logging() || code_event_handler_ != NULL;
   }
@@ -359,10 +377,18 @@
   ~Logger();
 
   // Issue code notifications.
-  void IssueCodeAddedEvent(Code* code, const char* name, size_t name_len);
+  void IssueCodeAddedEvent(Code* code,
+                           Handle<Script> script,

[danno, 2013/02/11 15:17:57]

Sorry, I think I gave you slightly misleading advice in the last set of
comments. It does appear that the Issue APIs take "naked" object pointers. So do
indeed pass a Script* here (sorry!!) for consistency with the other issue API.
However, still clean up how the Handle is cobbled together in the implementation
of IssueCodeAddedEvent. Please move the logic that you now have at the call
sites of IssueCodeAddedEvent that creates a Handle<Script> into
IssueCodeAddedEvent to make the handle right before you do the ToApi call.

+                           const char* name,
+                           size_t name_len);
   void IssueCodeMovedEvent(Address from, Address to);
   void IssueCodeRemovedEvent(Address from);
-
+  void IssueAddCodeLinePosInfoEvent(void* jit_handler_data,
+                                    int pc_offset,
+                                    int position,
+                                    JitCodeEvent::PositionType position_Type);
+  void* IssueStartCodePosInfoEvent();
+  void IssueEndCodePosInfoEvent(Code* code, void* jit_handler_data);
   // Emits the profiler's first message.
   void ProfilerBeginEvent();