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

runtime/vm/bootstrap_natives.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_BOOTSTRAP_NATIVES_H_
 #define RUNTIME_VM_BOOTSTRAP_NATIVES_H_
 
 #include "vm/native_entry.h"
 
 // bootstrap dart natives used in the core dart library.
 
 namespace dart {
 
 // List of bootstrap native entry points used in the core dart library.
 #define BOOTSTRAP_NATIVE_LIST(V)                                               \
+  V(AsyncStarMoveNext_debuggerStepCheck, 1)                                    \
   V(DartAsync_fatal, 1)                                                        \
   V(Object_equals, 2)                                                          \
   V(Object_getHash, 1)                                                         \
   V(Object_setHash, 2)                                                         \
   V(Object_toString, 1)                                                        \
   V(Object_noSuchMethod, 6)                                                    \
   V(Object_runtimeType, 1)                                                     \
   V(Object_haveSameRuntimeType, 2)                                             \
   V(Object_instanceOf, 3)                                                      \
   V(Object_simpleInstanceOf, 2)                                                \
@@ skipping 123 matching lines @@
   V(Random_nextState, 1)                                                       \
   V(Random_setupSeed, 1)                                                       \
   V(Random_initialSeed, 0)                                                     \
   V(SecureRandom_getBytes, 1)                                                  \
   V(DateTime_currentTimeMicros, 0)                                             \
   V(DateTime_timeZoneName, 1)                                                  \
   V(DateTime_timeZoneOffsetInSeconds, 1)                                       \
   V(DateTime_localTimeZoneAdjustmentInSeconds, 0)                              \
   V(AssertionError_throwNew, 3)                                                \
   V(Async_rethrow, 2)                                                          \
-  V(StackTrace_asyncStackTraceHelper, 0)                                       \
+  V(StackTrace_asyncStackTraceHelper, 1)                                       \
   V(StackTrace_clearAsyncThreadStackTrace, 0)                                  \
   V(StackTrace_setAsyncThreadStackTrace, 1)                                    \
   V(StackTrace_current, 0)                                                     \
   V(TypeError_throwNew, 5)                                                     \
   V(FallThroughError_throwNew, 1)                                              \
   V(AbstractClassInstantiationError_throwNew, 2)                               \
   V(Stopwatch_now, 0)                                                          \
   V(Stopwatch_frequency, 0)                                                    \
   V(Timeline_getIsolateNum, 0)                                                 \
   V(Timeline_getNextAsyncId, 0)                                                \
@@ skipping 256 matching lines @@
 #if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
   MIRRORS_BOOTSTRAP_NATIVE_LIST(DECLARE_BOOTSTRAP_NATIVE)
 #endif
 
 #undef DECLARE_BOOTSTRAP_NATIVE
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_BOOTSTRAP_NATIVES_H_