First step towards implementing stack map descriptions for the optimizing compiler.

vm/raw_object_snapshot.cc

 // 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.
 
 #include "vm/bigint_operations.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/snapshot.h"
 #include "vm/visitor.h"
 
@@ skipping 886 matching lines @@
 }
 
 
 void RawPcDescriptors::WriteTo(SnapshotWriter* writer,
                                intptr_t object_id,
                                Snapshot::Kind kind) {
   UNREACHABLE();
 }
 
 
+RawStackmap* Stackmap::ReadFrom(SnapshotReader* reader,
+                                intptr_t object_id,
+                                intptr_t tags,
+                                Snapshot::Kind kind) {
+  UNREACHABLE();
+  return Stackmap::null();
+}
+
+
+void RawStackmap::WriteTo(SnapshotWriter* writer,
+                          intptr_t object_id,
+                          Snapshot::Kind kind) {
+  UNREACHABLE();
+}
+
+
 RawLocalVarDescriptors* LocalVarDescriptors::ReadFrom(SnapshotReader* reader,
                                                       intptr_t object_id,
                                                       intptr_t tags,
                                                       Snapshot::Kind kind) {
   UNREACHABLE();
   return LocalVarDescriptors::null();
 }
 
 
 void RawLocalVarDescriptors::WriteTo(SnapshotWriter* writer,
@@ skipping 1034 matching lines @@
   writer->Write<RawObject*>(ptr()->num_bracket_expressions_);
   writer->WriteObject(ptr()->pattern_);
   writer->WriteIntptrValue(ptr()->type_);
   writer->WriteIntptrValue(ptr()->flags_);
 
   // Do not write out the data part which is native.
 }
 
 
 }  // namespace dart