Sane asynchronous debugging and stack traces

runtime/vm/stub_code.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 RUNTIME_VM_STUB_CODE_H_
 #define RUNTIME_VM_STUB_CODE_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 
@@ skipping 49 matching lines @@
   V(SmiEqualInlineCache)                                                       \
   V(OneArgOptimizedCheckInlineCache)                                           \
   V(TwoArgsOptimizedCheckInlineCache)                                          \
   V(ZeroArgsUnoptimizedStaticCall)                                             \
   V(OneArgUnoptimizedStaticCall)                                               \
   V(TwoArgsUnoptimizedStaticCall)                                              \
   V(Subtype1TestCache)                                                         \
   V(Subtype2TestCache)                                                         \
   V(Subtype3TestCache)                                                         \
   V(CallClosureNoSuchMethod)                                                   \
-  V(FrameAwaitingMaterialization)
+  V(FrameAwaitingMaterialization)                                              \
+  V(AsynchronousGapMarker)
 
 #else
 #define VM_STUB_CODE_LIST(V)                                                   \
   V(LazyCompile)                                                               \
   V(OptimizeFunction)                                                          \
   V(RunExceptionHandler)                                                       \
   V(DeoptForRewind)                                                            \
   V(FixCallersTarget)                                                          \
   V(Deoptimize)                                                                \
   V(DeoptimizeLazyFromReturn)                                                  \
   V(DeoptimizeLazyFromThrow)                                                   \
-  V(FrameAwaitingMaterialization)
+  V(FrameAwaitingMaterialization)                                              \
+  V(AsynchronousGapMarker)
 
 #endif  // !defined(TARGET_ARCH_DBC)
 
 // Is it permitted for the stubs above to refer to Object::null(), which is
 // allocated in the VM isolate and shared across all isolates.
 // However, in cases where a simple GC-safe placeholder is needed on the stack,
 // using Smi 0 instead of Object::null() is slightly more efficient, since a Smi
 // does not require relocation.
 
 // class StubEntry is used to describe stub methods generated in dart to
@@ skipping 111 matching lines @@
 
 // Zap value used to indicate unused CODE_REG in deopt.
 static const uword kZapCodeReg = 0xf1f1f1f1;
 
 // Zap value used to indicate unused return address in deopt.
 static const uword kZapReturnAddress = 0xe1e1e1e1;
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_STUB_CODE_H_