Very first steps for a debugger

runtime/vm/isolate.h

 // 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.
 
 #ifndef VM_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include <limits.h>
 
 #include "include/dart_api.h"
 #include "vm/assert.h"
 #include "vm/store_buffer.h"
 #include "vm/timer.h"
 
 namespace dart {
 
 // Forward declarations.
 class ApiState;
 class BigintStore;
 class CodeIndexTable;
+class Debugger;
 class HandleScope;
 class Heap;
 class LongJump;
 class MessageQueue;
 class Monitor;
 class ObjectPointerVisitor;
 class ObjectStore;
 class RawContext;
 class StackResource;
 class StubCode;
@@ skipping 204 matching lines @@
 
   void AdjustStackLimitForException() {
     stack_limit_ = stack_limit_on_overflow_exception_;
   }
 
   void StandardRunLoop();
 
   intptr_t ast_node_id() const { return ast_node_id_; }
   void set_ast_node_id(int value) { ast_node_id_ = value; }
 
+  Debugger* debugger() const { return debugger_; }
+
  private:
   Isolate();
 
   void PrintInvokedFunctions();
 
   static uword GetSpecifiedStackSize();
 
   static const uword kStackSizeBuffer = (128 * KB);
   static const uword kDefaultStackSize = (1 * MB);
 
@@ skipping 16 matching lines @@
   HandleScope* top_handle_scope_;
 #endif
   int32_t random_seed_;
   BigintStore* bigint_store_;
   uword top_exit_frame_info_;
   void* init_callback_data_;
   Dart_LibraryTagHandler library_tag_handler_;
   ApiState* api_state_;
   StubCode* stub_code_;
   CodeIndexTable* code_index_table_;
+  Debugger* debugger_;
   LongJump* long_jump_base_;
   TimerList timer_list_;
   uword stack_limit_;
   uword stack_limit_on_overflow_exception_;
   intptr_t ast_node_id_;
 
   static Dart_IsolateInitCallback init_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Isolate);
 };
 
 }  // namespace dart
 
 #if defined(TARGET_OS_LINUX)
 #include "vm/isolate_linux.h"
 #elif defined(TARGET_OS_MACOS)
 #include "vm/isolate_macos.h"
 #elif defined(TARGET_OS_WINDOWS)
 #include "vm/isolate_win.h"
 #else
 #error Unknown target os.
 #endif
 
 #endif  // VM_ISOLATE_H_