Getting value of local variables on stack trace

runtime/vm/raw_object.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 VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "vm/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 642 matching lines @@
 
   // Variable length data follows here.
   intptr_t data_[0];
 };
 
 
 class RawLocalVarDescriptors : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(LocalVarDescriptors);
 
   struct VarInfo {
-    intptr_t index;      // Slot index on stack.
+    intptr_t index;      // Slot index on stack or in context.
+    intptr_t scope_id;   // Scope to which the variable belongs.
     intptr_t begin_pos;  // Token position of scope start.
     intptr_t end_pos;    // Token position of scope end.
   };
 
   intptr_t length_;  // Number of descriptors.
   RawArray* names_;  // Array of [length_] variable names.
 
   VarInfo data_[0];   // Variable info with [length_] entries.
 };
 
@@ skipping 287 matching lines @@
   intptr_t type_;  // Uninitialized, simple or complex.
   intptr_t flags_;  // Represents global/local, case insensitive, multiline.
 
   // Variable length data follows here.
   uint8_t data_[0];
 };
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_