Track the 'awaiter return' call stack use it to detect uncaught exceptions in 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 28 matching lines @@
   V(MoveNext, "moveNext")                                                      \
   V(IsYieldEach, "isYieldEach")                                                \
   V(Value, "value")                                                            \
   V(_EnumHelper, "_EnumHelper")                                                \
   V(_SyncIterable, "_SyncIterable")                                            \
   V(_SyncIterableConstructor, "_SyncIterable.")                                \
   V(_SyncIterator, "_SyncIterator")                                            \
   V(IteratorParameter, ":iterator")                                            \
   V(_AsyncStarStreamController, "_AsyncStarStreamController")                  \
   V(_AsyncStarStreamControllerConstructor, "_AsyncStarStreamController.")      \
   V(Controller, ":controller")                                                 \

[hausner, 2017/02/28 19:04:51]

In other cases, the internal name is called ColonXXX. Maybe do this there too to
avoid Controller2 name?

[Cutch, 2017/02/28 21:46:52]

Done.

+  V(ControllerStream, ":controller_stream")                                    \
+  V(Controller2, "controller")                                                 \
   V(Stream, "stream")                                                          \
+  V(_StreamImpl, "_StreamImpl")                                                \
   V(isPaused, "isPaused")                                                      \
   V(AddError, "addError")                                                      \
   V(AddStream, "addStream")                                                    \
   V(Cancel, "cancel")                                                          \
   V(Close, "close")                                                            \
   V(Values, "values")                                                          \
   V(_EnumNames, "_enum_names")                                                 \
   V(_DeletedEnumSentinel, "_deleted_enum_sentinel")                            \
   V(_DeletedEnumPrefix, "Deleted enum value from ")                            \
   V(ExprTemp, ":expr_temp")                                                    \
@@ skipping 59 matching lines @@
   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(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")                                       \
   V(FutureValue, "Future.value")                                               \
   V(FutureThen, "then")                                                        \
   V(FutureCatchError, "catchError")                                            \
   V(Completer, "Completer")                                                    \
@@ skipping 71 matching lines @@
   V(TwoByteString, "_TwoByteString")                                           \
   V(ExternalOneByteString, "_ExternalOneByteString")                           \
   V(ExternalTwoByteString, "_ExternalTwoByteString")                           \
   V(_CapabilityImpl, "_CapabilityImpl")                                        \
   V(_RawReceivePortImpl, "_RawReceivePortImpl")                                \
   V(_SendPortImpl, "_SendPortImpl")                                            \
   V(_StackTrace, "_StackTrace")                                                \
   V(_RegExp, "_RegExp")                                                        \
   V(RegExp, "RegExp")                                                          \
   V(ColonMatcher, ":matcher")                                                  \
+  V(ColonStream, ":stream")                                                    \
   V(Object, "Object")                                                          \
   V(Int, "int")                                                                \
   V(Double, "double")                                                          \
   V(Float32x4, "Float32x4")                                                    \
   V(Float64x2, "Float64x2")                                                    \
   V(Int32x4, "Int32x4")                                                        \
   V(_Float32x4, "_Float32x4")                                                  \
   V(_Float64x2, "_Float64x2")                                                  \
   V(_Int32x4, "_Int32x4")                                                      \
   V(Int8List, "Int8List")                                                      \
@@ skipping 191 matching lines @@
   V(ConstructorClosurePrefix, "new#")                                          \
   V(_runExtension, "_runExtension")                                            \
   V(_runPendingImmediateCallback, "_runPendingImmediateCallback")              \
   V(DartLibrary, "dart.library.")                                              \
   V(DartLibraryMirrors, "dart.library.mirrors")                                \
   V(_name, "_name")                                                            \
   V(_classRangeCheck, "_classRangeCheck")                                      \
   V(_classRangeCheckNegative, "_classRangeCheckNegative")                      \
   V(GetRuntimeType, "get:runtimeType")                                         \
   V(HaveSameRuntimeType, "_haveSameRuntimeType")                               \
-  V(DartDeveloperCausalAsyncStacks, "dart.developer.causal_async_stacks")
+  V(DartDeveloperCausalAsyncStacks, "dart.developer.causal_async_stacks")      \
+  V(_AsyncStarListenHelper, "_asyncStarListenHelper")
 
 
 // Contains a list of frequently used strings in a canonicalized form. This
 // list is kept in the vm_isolate in order to share the copy across isolates
 // without having to maintain copies in each isolate.
 class Symbols : public AllStatic {
  public:
   enum { kMaxOneCharCodeSymbol = 0xFF };
 
   // List of strings that are pre created in the vm isolate.
@@ skipping 245 matching lines @@
   friend class Serializer;
   friend class Deserializer;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_SYMBOLS_H_