Debugger support for step-into async and async* functions.

runtime/vm/debugger.h

 // 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.
 
 #ifndef RUNTIME_VM_DEBUGGER_H_
 #define RUNTIME_VM_DEBUGGER_H_
 
 #include "include/dart_tools_api.h"
 
 #include "vm/object.h"
@@ skipping 436 matching lines @@
 
   typedef void EventHandler(ServiceEvent* event);
 
   Debugger();
   ~Debugger();
 
   void Initialize(Isolate* isolate);
   void NotifyIsolateCreated();
   void Shutdown();
 
+  void OnIsolateRunnable();
+
   void NotifyCompilation(const Function& func);
   void NotifyDoneLoading();
 
   RawFunction* ResolveFunction(const Library& library,
                                const String& class_name,
                                const String& function_name);
 
   // Set breakpoint at closest location to function entry.
   Breakpoint* SetBreakpointAtEntry(const Function& target_function,
                                    bool single_shot);
@@ skipping 10 matching lines @@
   RawError* OneTimeBreakAtEntry(const Function& target_function);
 
   BreakpointLocation* BreakpointLocationAtLineCol(const String& script_url,
                                                   intptr_t line_number,
                                                   intptr_t column_number);
 
 
   void RemoveBreakpoint(intptr_t bp_id);
   Breakpoint* GetBreakpointById(intptr_t id);
 
+  void MaybeAsyncStepInto(const Closure& async_op);
+
+  void Continue();
+
   bool SetResumeAction(ResumeAction action,
                        intptr_t frame_index = 1,
                        const char** error = NULL);
 
   bool IsStepping() const { return resume_action_ != kContinue; }
 
+  bool IsSingleStepping() const { return resume_action_ == kStepInto; }
+
   bool IsPaused() const { return pause_event_ != NULL; }
 
   // Put the isolate into single stepping mode when Dart code next runs.
   //
   // This is used by the vm service to allow the user to step while
   // paused at isolate start.
   void EnterSingleStepMode();
 
   // Indicates why the debugger is currently paused.  If the debugger
   // is not paused, this returns NULL.  Note that the debugger can be
@@ skipping 252 matching lines @@
 
   friend class Isolate;
   friend class BreakpointLocation;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_DEBUGGER_H_