Compile and simulate first dart function on arm generated from ast.

runtime/vm/simulator_arm.h

 // 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.
 
 // Declares a Simulator for ARM instructions if we are not generating a native
 // ARM binary. This Simulator allows us to run and debug ARM code generation on
 // regular desktop machines.
 // Dart calls into generated code by "calling" the InvokeDartCode stub,
 // which will start execution in the Simulator or forwards to the real entry
 // on a ARM HW platform.
 
 #ifndef VM_SIMULATOR_ARM_H_
 #define VM_SIMULATOR_ARM_H_
 
 #ifndef VM_SIMULATOR_H_
 #error Do not include simulator_arm.h directly; use simulator.h.
 #endif
 
 #include "vm/allocation.h"
 #include "vm/constants_arm.h"
 #include "vm/object.h"
 
 namespace dart {
 
 class Isolate;
 class SimulatorSetjmpBuffer;
 
 class Simulator {
  public:
-  static const size_t kSimulatorStackUnderflowSize = 64;
+  static const uword kSimulatorStackUnderflowSize = 64;
 
   Simulator();
   ~Simulator();
 
   // The currently executing Simulator instance, which is associated to the
   // current isolate
   static Simulator* Current();
 
   // Accessors for register state. Reading the pc value adheres to the ARM
   // architecture specification and is off by 8 from the currently executing
   // instruction.
   void set_register(Register reg, int32_t value);
   int32_t get_register(Register reg) const;
 
   // Special case of set_register and get_register to access the raw PC value.
   void set_pc(int32_t value);
   int32_t get_pc() const;
 
   // Accessors for VFP register state.
   void set_sregister(SRegister reg, float value);
   float get_sregister(SRegister reg) const;
   void set_dregister(DRegister reg, double value);
   double get_dregister(DRegister reg) const;
 
-  // Accessor to the internal simulator stack area.
-  uintptr_t StackTop() const;
-  uintptr_t StackLimit() const;
+  // Accessor to the internal simulator stack top.
+  uword StackTop() const;
 
   // Executes ARM instructions until the PC reaches end_sim_pc.
   void Execute();
 
   // Call on program start.
   static void InitOnce();
 
   // Dart generally calls into generated code with 5 parameters. This is a
   // convenience function, which sets up the simulator state and grabs the
   // result on return.
@@ skipping 153 matching lines @@
   }
 
   friend class SimulatorDebugger;
   friend class SimulatorSetjmpBuffer;
   DISALLOW_COPY_AND_ASSIGN(Simulator);
 };
 
 }  // namespace dart
 
 #endif  // VM_SIMULATOR_ARM_H_