Change static calls in unoptimized code to always call via a stub. Using ICData, the call count of …

runtime/vm/code_patcher.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.
 // Class for patching compiled code.
 
 #ifndef VM_CODE_PATCHER_H_
 #define VM_CODE_PATCHER_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
 
 // Forward declaration.
 class Array;
 class Code;
 class ExternalLabel;
 class Function;
 class ICData;
 class RawArray;
+class RawFunction;
 class RawICData;
 class String;
 
 class CodePatcher : public AllStatic {
  public:
   // Dart static calls have a distinct, machine-dependent code pattern.
 
   // Patch static call before return_address in given code to the new target.
   static void PatchStaticCallAt(uword return_address,
                                 const Code& code,
@@ skipping 18 matching lines @@
   // in given code.
   static uword GetStaticCallTargetAt(uword return_address, const Code& code);
 
   // Get instance call information.  Returns the call target and sets each
   // of the output parameters ic_data and arguments_descriptor if they are
   // non-NULL.
   static uword GetInstanceCallAt(uword return_address,
                                  const Code& code,
                                  ICData* ic_data);
 
+  // Return target of an unoptimized static call (calls target via a stub).
+  static RawFunction* GetUnoptimizedStaticCallTargetAt(uword return_address,
+                                                       const Code& code);
+
   // Return the arguments descriptor array of the closure call
   // before the given return address.
   static RawArray* GetClosureArgDescAt(uword return_address,
                                        const Code& code);
 
   static intptr_t InstanceCallSizeInBytes();
 
   static void InsertCallAt(uword start, uword target);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_PATCHER_H_