Track the 'awaiter return' call stack use it to detect uncaught exceptions in async functions

runtime/vm/object.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_OBJECT_H_
 #define RUNTIME_VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 4495 matching lines @@
  public:
   static const intptr_t kInvalidPcOffset = 0;
 
   intptr_t num_entries() const;
 
   void GetHandlerInfo(intptr_t try_index, ExceptionHandlerInfo* info) const;
 
   uword HandlerPCOffset(intptr_t try_index) const;
   intptr_t OuterTryIndex(intptr_t try_index) const;
   bool NeedsStackTrace(intptr_t try_index) const;
+  bool IsGenerated(intptr_t try_index) const;
 
   void SetHandlerInfo(intptr_t try_index,
                       intptr_t outer_try_index,
                       uword handler_pc_offset,
                       bool needs_stacktrace,
-                      bool has_catch_all) const;
+                      bool has_catch_all,
+                      TokenPosition token_pos,
+                      bool is_generated) const;
 
   RawArray* GetHandledTypes(intptr_t try_index) const;
   void SetHandledTypes(intptr_t try_index, const Array& handled_types) const;
   bool HasCatchAll(intptr_t try_index) const;
 
   static intptr_t InstanceSize() {
     ASSERT(sizeof(RawExceptionHandlers) ==
            OFFSET_OF_RETURNED_VALUE(RawExceptionHandlers, data));
     return 0;
   }
@@ skipping 143 matching lines @@
 
   RawCodeSourceMap* code_source_map() const {
     return raw_ptr()->code_source_map_;
   }
 
   void set_code_source_map(const CodeSourceMap& code_source_map) const {
     ASSERT(code_source_map.IsOld());
     StorePointer(&raw_ptr()->code_source_map_, code_source_map.raw());
   }
 
+  RawArray* await_token_positions() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return Array::null();
+#else
+    return raw_ptr()->await_token_positions_;
+#endif
+  }
+
+  void SetAwaitTokenPositions(const Array& await_token_positions) const;
+
   // Used during reloading (see object_reload.cc). Calls Reset on all ICDatas
   // that are embedded inside the Code object.
   void ResetICDatas(Zone* zone) const;
 
   // Array of DeoptInfo objects.
   RawArray* deopt_info_array() const {
 #if defined(DART_PRECOMPILED_RUNTIME)
     UNREACHABLE();
     return NULL;
 #else
@@ skipping 4216 matching lines @@
 
 inline void TypeArguments::SetHash(intptr_t value) const {
   // This is only safe because we create a new Smi, which does not cause
   // heap allocation.
   StoreSmi(&raw_ptr()->hash_, Smi::New(value));
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_H_