Add ActivationFrame_GetFramePointer method and test.

runtime/vm/debugger_api_impl.cc

 // Copyright (c) 2012, 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 "include/dart_debugger_api.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
@@ skipping 290 matching lines @@
 
   if (location != NULL) {
     location->script_url = Api::NewHandle(isolate, frame->SourceUrl());
     const Library& lib = Library::Handle(frame->Library());
     location->library_id = lib.index();
     location->token_pos = frame->TokenPos();
   }
   return Api::Success();
 }
 
+DART_EXPORT Dart_Handle Dart_ActivationFrameGetFramePointer(
+                            Dart_ActivationFrame activation_frame,
+                            uintptr_t* frame_pointer) {
+  Isolate* isolate = Isolate::Current();
+  DARTSCOPE(isolate);
+  CHECK_AND_CAST(ActivationFrame, frame, activation_frame);
+
+  if (frame_pointer != NULL) {
+    *frame_pointer = static_cast<uintptr_t>(frame->fp());
+  }
+  return Api::Success();
+}
+
 
 DART_EXPORT Dart_Handle Dart_GetFunctionOrigin(Dart_Handle function_in) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   UNWRAP_AND_CHECK_PARAM(Function, function, function_in);
 
   const Class& cls = Class::Handle(function.origin());
   if (!cls.IsTopLevel()) {
     return Dart_NewInteger(cls.id());
   }
@@ skipping 658 matching lines @@
   return Api::CastIsolate(isolate);
 }
 
 
 DART_EXPORT Dart_IsolateId Dart_GetIsolateId(Dart_Isolate dart_isolate) {
   Isolate* isolate = reinterpret_cast<Isolate*>(dart_isolate);
   return isolate->debugger()->GetIsolateId();
 }
 
 }  // namespace dart