Add support for object pool

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 RawICData;
 class String;
 
 class CodePatcher : public AllStatic {
  public:
   // Dart static calls have a distinct, machine-dependent code pattern.
 
   // Patch static call to the new target.
-  static void PatchStaticCallAt(uword addr, uword new_target_address);
+  static void PatchStaticCallAt(uword return_address,
+                                const Code& code,

[srdjan, 2013/02/15 21:24:27]

Please modify comment/variable name 'code' to explain what 'code' is for.

[regis, 2013/02/15 22:51:31]

Done.

+                                uword new_target_address);
 
   // Patch instance call to the new target.
-  static void PatchInstanceCallAt(uword addr, uword new_target_address);
+  static void PatchInstanceCallAt(uword return_address,
+                                  const Code& code,

[srdjan, 2013/02/15 21:24:27]

ditto here and below.

[regis, 2013/02/15 22:51:31]

Done.

+                                  uword new_target_address);
 
   // Patch entry point with a jump as specified in the code's patch region.
   static void PatchEntry(const Code& code);
 
   // Restore entry point with original code (i.e., before patching).
   static void RestoreEntry(const Code& code);
 
   // Returns true if the code can be patched with a jump at beginnning (checks
   // that there are no conflicts with object pointers). Used in ASSERTs.
   static bool CodeIsPatchable(const Code& code);
 
-  // Returns true if the code before return_address is a static
-  // or dynamic Dart call.
-  static bool IsDartCall(uword return_address);
-
-  static uword GetStaticCallTargetAt(uword return_address);
+  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,
                                  Array* arguments_descriptor);
 
   static intptr_t InstanceCallSizeInBytes();
 
   static void InsertCallAt(uword start, uword target);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_PATCHER_H_