VM: Link native calls lazily.

runtime/vm/instructions_arm64.h

 // Copyright (c) 2014, 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.
 // Classes that describe assembly patterns as used by inline caches.
 
 #ifndef VM_INSTRUCTIONS_ARM64_H_
 #define VM_INSTRUCTIONS_ARM64_H_
 
 #ifndef VM_INSTRUCTIONS_H_
 #error Do not include instructions_arm64.h directly; use instructions.h instead.
 #endif
 
 #include "vm/constants_arm64.h"
+#include "vm/native_entry.h"
 #include "vm/object.h"
 
 namespace dart {
 
 class InstructionPattern : public AllStatic {
  public:
   // Decodes a load sequence ending at 'end' (the last instruction of the
   // load sequence is the instruction before the one at end).  Returns the
   // address of the first instruction in the sequence.  Returns the register
   // being loaded and the loaded object in the output parameters 'reg' and
@@ skipping 51 matching lines @@
   uword end_;
   uword ic_data_load_end_;
 
   intptr_t target_address_pool_index_;
   ICData& ic_data_;
 
   DISALLOW_COPY_AND_ASSIGN(CallPattern);
 };
 
 
+class NativeCallPattern : public ValueObject {
+ public:
+  NativeCallPattern(uword pc, const Code& code);
+
+  uword target() const;
+  void set_target(uword target_address) const;
+
+  NativeFunction native_function() const;
+  void set_native_function(NativeFunction target) const;
+
+ private:
+  const ObjectPool& object_pool_;
+
+  uword end_;
+  intptr_t native_function_pool_index_;
+  intptr_t target_address_pool_index_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeCallPattern);
+};
+
+
 class JumpPattern : public ValueObject {
  public:
   JumpPattern(uword pc, const Code& code);
 
   static const int kLengthInBytes = 5 * Instr::kInstrSize;
 
   int pattern_length_in_bytes() const {
     return kLengthInBytes;
   }
 
@@ skipping 21 matching lines @@
 
   bool IsValid() const;
 
  private:
   const uword pc_;
 };
 
 }  // namespace dart
 
 #endif  // VM_INSTRUCTIONS_ARM64_H_