Handle stepping requests after isolate interrupt event

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 VM_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 349 matching lines @@
   RawObject* GetInstanceField(const Class& cls,
                               const String& field_name,
                               const Instance& object);
   RawObject* GetStaticField(const Class& cls,
                             const String& field_name);
 
   void SignalBpReached();
   void DebuggerStepCallback();
 
   void SignalExceptionThrown(const Instance& exc);
-  static void SignalIsolateEvent(EventType type);
+  void SignalIsolateEvent(EventType type);
+  static void SignalIsolateInterrupted();
 
   uword GetPatchedStubAddress(uword breakpoint_address);
 
   void PrintBreakpointsToJSONArray(JSONArray* jsarr) const;
 
   static bool IsDebuggable(const Function& func);
 
  private:
   enum ResumeAction {
     kContinue,
@@ skipping 54 matching lines @@
 
   void CollectLibraryFields(const GrowableObjectArray& field_list,
                             const Library& lib,
                             const String& prefix,
                             bool include_private_fields);
 
   // Handles any events which pause vm execution.  Breakpoints,
   // interrupts, etc.
   void Pause(DebuggerEvent* event);
 
+  void HandleSteppingRequest(DebuggerStackTrace* stack_trace);
+
   Isolate* isolate_;
   Dart_Port isolate_id_;  // A unique ID for the isolate in the debugger.
   bool initialized_;
 
   // ID number generator.
   intptr_t next_id_;
 
 
   SourceBreakpoint* src_breakpoints_;
   CodeBreakpoint* code_breakpoints_;
@@ skipping 29 matching lines @@
 
   friend class Isolate;
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_