Eliminate excessive increment of deoptimization counters (e.g., with deep recursion of deoptimized …

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 7707 matching lines @@
     if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
       Function& function = Function::Handle(code.function());
       THR_Print("Deoptimizing %s because guard on field %s failed.\n",
                 function.ToFullyQualifiedCString(), field_.ToCString());
     }
   }
 
   virtual void ReportSwitchingCode(const Code& code) {
     if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
       Function& function = Function::Handle(code.function());
-      THR_Print("Switching %s to unoptimized code because guard"
-                " on field %s was violated.\n",
+      THR_Print("Switching '%s' to unoptimized code because guard"
+                " on field '%s' was violated.\n",
                 function.ToFullyQualifiedCString(),
                 field_.ToCString());
     }
   }
 
   virtual void IncrementInvalidationGen() {
     Isolate::Current()->IncrFieldInvalidationGen();
   }
 
  private:
@@ skipping 14256 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart