A64: Make the simulator sampling friendly.

src/a64/simulator-a64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 633 matching lines @@
                        bool set_flags,
                        int64_t src1,
                        int64_t src2,
                        int64_t carry_in = 0);
   void LogicalHelper(Instruction* instr, int64_t op2);
   void ConditionalCompareHelper(Instruction* instr, int64_t op2);
   void LoadStoreHelper(Instruction* instr,
                        int64_t offset,
                        AddrMode addrmode);
   void LoadStorePairHelper(Instruction* instr, AddrMode addrmode);
-  uint8_t* AddressModeHelper(unsigned addr_reg,
-                             int64_t offset,
-                             AddrMode addrmode);
+  uint8_t* LoadStoreAddress(unsigned addr_reg,
+                            int64_t offset,
+                            AddrMode addrmode);
+  void LoadStoreWriteBack(unsigned addr_reg,
+                          int64_t offset,
+                          AddrMode addrmode);
+  void CheckMemoryAccess(uint8_t* address, uint8_t* stack);
 
   uint64_t MemoryRead(uint8_t* address, unsigned num_bytes);
   uint8_t MemoryRead8(uint8_t* address);
   uint16_t MemoryRead16(uint8_t* address);
   uint32_t MemoryRead32(uint8_t* address);
   float MemoryReadFP32(uint8_t* address);
   uint64_t MemoryRead64(uint8_t* address);
   double MemoryReadFP64(uint8_t* address);
 
   void MemoryWrite(uint8_t* address, uint64_t value, unsigned num_bytes);
@@ skipping 183 matching lines @@
   static void UnregisterCTryCatch() {
     Simulator::current(Isolate::Current())->PopAddress();
   }
 };
 
 #endif  // !defined(USE_SIMULATOR)
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_SIMULATOR_A64_H_