Very first steps for a debugger

runtime/vm/code_generator.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_CODE_GENERATOR_H_
 #define VM_CODE_GENERATOR_H_
 
 #include "vm/globals.h"
 #include "vm/runtime_entry.h"
 
 #if defined(TARGET_ARCH_IA32)
 #include "vm/code_generator_ia32.h"
 #elif defined(TARGET_ARCH_X64)
 #include "vm/code_generator_x64.h"
 #elif defined(TARGET_ARCH_ARM)
 #include "vm/code_generator_arm.h"
 #else
 #error Unknown architecture.
 #endif
 
 namespace dart {
 
 // Declaration of runtime entries called from stub or generated code.
 DECLARE_RUNTIME_ENTRY(AllocateArray);
 DECLARE_RUNTIME_ENTRY(AllocateClosure);
 DECLARE_RUNTIME_ENTRY(AllocateImplicitInstanceClosure);
 DECLARE_RUNTIME_ENTRY(AllocateImplicitStaticClosure);
 DECLARE_RUNTIME_ENTRY(AllocateContext);
 DECLARE_RUNTIME_ENTRY(AllocateObject);
+DECLARE_RUNTIME_ENTRY(BreakpointHandler);
 DECLARE_RUNTIME_ENTRY(CloneContext);
 DECLARE_RUNTIME_ENTRY(ClosureArgumentMismatch);
 DECLARE_RUNTIME_ENTRY(Deoptimize);
 DECLARE_RUNTIME_ENTRY(FixCallersTarget);
 DECLARE_RUNTIME_ENTRY(InlineCacheMissHandler);
 DECLARE_RUNTIME_ENTRY(Instanceof);
 DECLARE_RUNTIME_ENTRY(InstantiateTypeArguments);
 DECLARE_RUNTIME_ENTRY(InvokeImplicitClosureFunction);
 DECLARE_RUNTIME_ENTRY(InvokeNoSuchMethodFunction);
 DECLARE_RUNTIME_ENTRY(OptimizeInvokedFunction);
@@ skipping 72 matching lines @@
                               const Function& function,
                               int num_arguments,
                               int num_named_arguments);
 
   const Class& class_;
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_GENERATOR_H_