Tracing: Fix message creation tracing for inline EPs (#2178)

Co-authored-by: Phil Miller (Charmworks) <[email protected]>
Co-authored-by: Matthias Diener <[email protected]>

Author: 3 people

src/ck-core/cklocation.C

@@ -3052,10 +3052,8 @@ void CkLocMgr::prepMsg(CkArrayMessage* msg, CkArrayID mgr, const CkArrayIndex& i
 
   checkInBounds(idx);
 
-  if (type == CkDeliver_queue)
-  {
-    _TRACE_CREATION_DETAILED(env, msg->array_ep());
-  }
+  // Trace this send for Projections
+  _TRACE_CREATION_DETAILED(env, msg->array_ep());
 
   CmiUInt8 id;
   if (lookupID(idx, id))

src/xlat-i/xi-Entry.C

@@ -545,8 +545,15 @@ void Entry::genArrayDefs(XStr& str) {
     str << "  ckCheck();\n";
     XStr inlineCall;
     if (!isNoTrace())
+      // Create a dummy envelope to represent the "message send" to the local/inline method
+      // so that Projections can trace the method back to its caller
       inlineCall
-          << "    _TRACE_BEGIN_EXECUTE_DETAILED(0,ForArrayEltMsg,(" << epIdx()
+          << "  envelope env;\n"
+          << "  env.setMsgtype(ForArrayEltMsg);\n"
+          << "  env.setTotalsize(0);\n"
+          << "  _TRACE_CREATION_DETAILED(&env, " << epIdx() << ");\n"
+          << "  _TRACE_CREATION_DONE(1);\n"
+          << "  _TRACE_BEGIN_EXECUTE_DETAILED(CpvAccess(curPeEvent),ForArrayEltMsg,(" << epIdx()
           << "),CkMyPe(), 0, ((CkArrayIndex&)ckGetIndex()).getProjectionID(), obj);\n";
     if (isAppWork()) inlineCall << "    _TRACE_BEGIN_APPWORK();\n";
     inlineCall << "#if CMK_LBDB_ON\n";