Copy ICData descriptors when starting background compilation, so that they do not change while comp…

runtime/vm/flow_graph_inliner.cc

 // Copyright (c) 2013, 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/flow_graph_inliner.h"
 
 #include "vm/block_scheduler.h"
 #include "vm/compiler.h"
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
@@ skipping 682 matching lines @@
       bool in_cache;
       ParsedFunction* parsed_function;
       {
         CSTAT_TIMER_SCOPE(thread(), graphinliner_parse_timer);
         parsed_function = GetParsedFunction(function, &in_cache);
       }
 
       // Load IC data for the callee.
       ZoneGrowableArray<const ICData*>* ic_data_array =
             new(Z) ZoneGrowableArray<const ICData*>();
-      function.RestoreICDataMap(ic_data_array);
+      const bool clone_descriptors = Compiler::IsBackgroundCompilation();
+      function.RestoreICDataMap(ic_data_array, clone_descriptors);
 
       // Build the callee graph.
       InlineExitCollector* exit_collector =
           new(Z) InlineExitCollector(caller_graph_, call);
       FlowGraphBuilder builder(*parsed_function,
                                *ic_data_array,
                                exit_collector,
                                Compiler::kNoOSRDeoptId);
       builder.SetInitialBlockId(caller_graph_->max_block_id());
       FlowGraph* callee_graph;
@@ skipping 1179 matching lines @@
 intptr_t FlowGraphInliner::NextInlineId(const Function& function,
                                         intptr_t parent_id) {
   const intptr_t id = inline_id_to_function_->length();
   inline_id_to_function_->Add(&function);
   caller_inline_id_->Add(parent_id);
   return id;
 }
 
 
 }  // namespace dart