Use CodeSourceMap for stack traces (still JIT only).

runtime/vm/exceptions.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/exceptions.h"
 
 #include "platform/address_sanitizer.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 80 matching lines @@
   if (cur_index_ >= StackTrace::kPreallocatedStackdepth) {
     // The number of frames is overflowing the preallocated stack trace object.
     Code& frame_code = Code::Handle();
     Smi& frame_offset = Smi::Handle();
     intptr_t start = StackTrace::kPreallocatedStackdepth - (kNumTopframes - 1);
     intptr_t null_slot = start - 2;
     // We are going to drop one frame.
     dropped_frames_++;
     // Add an empty slot to indicate the overflow so that the toString
     // method can account for the overflow.
-    if (stacktrace_.FunctionAtFrame(null_slot) != Function::null()) {
+    if (stacktrace_.CodeAtFrame(null_slot) != Code::null()) {
       stacktrace_.SetCodeAtFrame(null_slot, frame_code);
       // We drop an extra frame here too.
       dropped_frames_++;
     }
     // Encode the number of dropped frames into the pc offset.
     frame_offset ^= Smi::New(dropped_frames_);
     stacktrace_.SetPcOffsetAtFrame(null_slot, frame_offset);
     // Move frames one slot down so that we can accomodate the new frame.
     for (intptr_t i = start; i < StackTrace::kPreallocatedStackdepth; i++) {
       intptr_t prev = (i - 1);
@@ skipping 701 matching lines @@
       class_name = &Symbols::_CompileTimeError();
       break;
   }
 
   return DartLibraryCalls::InstanceCreate(library, *class_name,
                                           *constructor_name, arguments);
 }
 
 
 }  // namespace dart