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

runtime/vm/coverage.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/coverage.h"
 
 #include "include/dart_api.h"
 
 #include "vm/compiler.h"
 #include "vm/isolate.h"
@@ skipping 65 matching lines @@
   if (Compiler::EnsureUnoptimizedCode(thread, function) != Error::null()) {
     // Ignore the error and this function entirely.
     return;
   }
   const Code& code = Code::Handle(zone, function.unoptimized_code());
   ASSERT(!code.IsNull());
 
   // Print the hit counts for all IC datas.
   ZoneGrowableArray<const ICData*>* ic_data_array =
       new(zone) ZoneGrowableArray<const ICData*>();
-  function.RestoreICDataMap(ic_data_array);
+  function.RestoreICDataMap(ic_data_array, false /* clone descriptors */);
   const PcDescriptors& descriptors = PcDescriptors::Handle(
       zone, code.pc_descriptors());
 
   const intptr_t begin_pos = function.token_pos();
   const intptr_t end_pos = function.end_token_pos();
   intptr_t last_line = -1;
   intptr_t last_count = 0;
   // Only IC based calls have counting.
   PcDescriptors::Iterator iter(descriptors,
       RawPcDescriptors::kIcCall | RawPcDescriptors::kUnoptStaticCall);
@@ skipping 187 matching lines @@
         cls = it.GetNextClass();
         ASSERT(!cls.IsNull());
         PrintClass(lib, cls, jsarr, filter, as_call_sites);
       }
     }
   }
 }
 
 
 }  // namespace dart