Enables V8 integration with the Intel VTune performance analysis tool. This allows the VTune profi…

src/lithium.cc

Index: src/lithium.cc
===================================================================
--- src/lithium.cc	(revision 12182)
+++ src/lithium.cc	(working copy)
@@ -419,6 +419,10 @@
 
 Handle<Code> LChunk::Codegen() {
   MacroAssembler assembler(info()->isolate(), NULL, 0);
+#ifdef ENABLE_VTUNE_JIT_INTERFACE
+  if (VTUNERUNNING)
+    assembler.positions_recorder()->StartVtuneJITLineInfoRecording();
+#endif
   LCodeGen generator(this, &assembler, info());
 
   MarkEmptyBlocks();
@@ -432,6 +436,16 @@
     Handle<Code> code =
         CodeGenerator::MakeCodeEpilogue(&assembler, flags, info());
     generator.FinishCode(code);
+#ifdef ENABLE_VTUNE_JIT_INTERFACE
+    if (VTUNERUNNING) {
+      if (!code.is_null()) {
+        VtuneJITLineInfo* vtunelineinfo =
+          assembler.positions_recorder()->DetachVtuneJITLineInfo();
+
+        VTUNEJIT(RegisterDetailedLineInfo(*code, vtunelineinfo));
+      }
+    }
+#endif
     CodeGenerator::PrintCode(code, info());
     return code;
   }