Track async causal stack traces

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 8370 matching lines @@
 };
 
 
 // Internal stacktrace object used in exceptions for printing stack traces.
 class StackTrace : public Instance {
  public:
   static const int kPreallocatedStackdepth = 30;
 
   intptr_t Length() const;
 
-  RawFunction* FunctionAtFrame(intptr_t frame_index) const;
+  RawStackTrace* async_link() const { return raw_ptr()->async_link_; }
+  void set_async_link(const StackTrace& async_link) const;
+  void set_expand_inlined(bool value) const;
 
+  RawArray* code_array() const { return raw_ptr()->code_array_; }
   RawCode* CodeAtFrame(intptr_t frame_index) const;
   void SetCodeAtFrame(intptr_t frame_index, const Code& code) const;
 
+  RawFunction* FunctionAtFrame(intptr_t frame_index) const;
+
+  RawArray* pc_offset_array() const { return raw_ptr()->pc_offset_array_; }
   RawSmi* PcOffsetAtFrame(intptr_t frame_index) const;
   void SetPcOffsetAtFrame(intptr_t frame_index, const Smi& pc_offset) const;
-  void set_expand_inlined(bool value) const;
 
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawStackTrace));
   }
   static RawStackTrace* New(const Array& code_array,
                             const Array& pc_offset_array,
                             Heap::Space space = Heap::kNew);
 
+  static RawStackTrace* New(const Array& code_array,
+                            const Array& pc_offset_array,
+                            const StackTrace& async_link,
+                            Heap::Space space = Heap::kNew);
+
   // The argument 'max_frames' limits the number of printed frames.
-  const char* ToCStringInternal(intptr_t* frame_index,
-                                intptr_t max_frames = kMaxInt32) const;
+  static const char* ToCStringInternal(const StackTrace& stack_trace,
+                                       intptr_t* frame_index,
+                                       intptr_t max_frames = kMaxInt32);
 
  private:
   void set_code_array(const Array& code_array) const;
   void set_pc_offset_array(const Array& pc_offset_array) const;
   bool expand_inlined() const;
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(StackTrace, Instance);
   friend class Class;
   friend class Debugger;
 };
@@ skipping 473 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_