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

runtime/vm/symbols.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_SYMBOLS_H_
 #define RUNTIME_VM_SYMBOLS_H_
 
 #include "vm/growable_array.h"
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
@@ skipping 108 matching lines @@
   V(AsyncOperationParam, ":async_result")                                      \
   V(AsyncOperationErrorParam, ":async_error_param")                            \
   V(AsyncOperationStackTraceParam, ":async_stack_trace_param")                 \
   V(AsyncSavedTryCtxVarPrefix, ":async_saved_try_ctx_var_")                    \
   V(AsyncStackTraceVar, ":async_stack_trace")                                  \
   V(ClearAsyncThreadStackTrace, "_clearAsyncThreadStackTrace")                 \
   V(SetAsyncThreadStackTrace, "_setAsyncThreadStackTrace")                     \
   V(AsyncCatchHelper, "_asyncCatchHelper")                                     \
   V(AsyncThenWrapperHelper, "_asyncThenWrapperHelper")                         \
   V(AsyncErrorWrapperHelper, "_asyncErrorWrapperHelper")                       \
+  V(AsyncStarMoveNextHelper, "_asyncStarMoveNextHelper")                       \
   V(AsyncStackTraceHelper, "_asyncStackTraceHelper")                           \
   V(AsyncAwaitHelper, "_awaitHelper")                                          \
   V(Await, "await")                                                            \
   V(_Awaiter, "_awaiter")                                                      \
   V(AwaitTempVarPrefix, ":await_temp_var_")                                    \
   V(AwaitContextVar, ":await_ctx_var")                                         \
   V(AwaitJumpVar, ":await_jump_var")                                           \
   V(Future, "Future")                                                          \
   V(FutureOr, "FutureOr")                                                      \
   V(FutureMicrotask, "Future.microtask")                                       \
@@ skipping 549 matching lines @@
   friend class Serializer;
   friend class Deserializer;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_SYMBOLS_H_