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

src/full-codegen.cc

Index: src/full-codegen.cc
===================================================================
--- src/full-codegen.cc	(revision 13212)
+++ src/full-codegen.cc	(working copy)
@@ -307,7 +307,11 @@
 #ifdef ENABLE_GDB_JIT_INTERFACE
   masm.positions_recorder()->StartGDBJITLineInfoRecording();
 #endif
-
+  if (FLAG_jit_profile) {

[danno, 2012/12/20 16:27:20]

See comment in flags-definition.h

+    JITCodeLineInfo* lineinfo = masm.positions_recorder()->
+                                InitializeJITLineInfo();

[danno, 2012/12/20 16:27:20]

nit: indentation should be 4 chars. Better yet, break the line after the "=" and
the rest of the statement will be on the same line.

+    LOG_CODE_EVENT(isolate, CodeStartLinePosInfoRecordEvent(lineinfo));
+  }
   FullCodeGenerator cgen(&masm, info);
   cgen.Generate();
   if (cgen.HasStackOverflow()) {
@@ -344,6 +348,12 @@
     GDBJIT(RegisterDetailedLineInfo(*code, lineinfo));
   }
 #endif
+  if (FLAG_jit_profile) {
+    if (!code.is_null()) {
+      void* lineinfo =  masm.positions_recorder()->DetachJITLineInfo();
+      LOG_CODE_EVENT(isolate, CodeEndLinePosInfoRecordEvent(*code, lineinfo));
+    }
+  }
   return !code.is_null();
 }