Distinguish internal kill messages from user-initiated kill messages.

runtime/vm/raw_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 VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 1441 matching lines @@
   RawInstance* stacktrace_;
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->stacktrace_);
   }
 };
 
 
 class RawUnwindError : public RawError {
   RAW_HEAP_OBJECT_IMPLEMENTATION(UnwindError);
 
+  bool is_user_initiated_;

[Cutch, 2015/09/24 17:12:58]

Usually these fields go *after* to()

[turnidge, 2015/09/24 17:22:53]

Done.

   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->message_);
   }
   RawString* message_;
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->message_);
   }
 };
 
 
@@ skipping 760 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_