Moved buffer handling to AssemblerBase.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 38 matching lines @@
 class ApiFunction;
 
 namespace internal {
 
 struct StatsCounter;
 // -----------------------------------------------------------------------------
 // Platform independent assembler base class.
 
 class AssemblerBase: public Malloced {
  public:
-  explicit AssemblerBase(Isolate* isolate);
+  AssemblerBase(Isolate* isolate, void* buffer, int buffer_size);
+  virtual ~AssemblerBase();
 
   Isolate* isolate() const { return isolate_; }
   int jit_cookie() const { return jit_cookie_; }
 
   bool emit_debug_code() const { return emit_debug_code_; }
   void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
 
   bool predictable_code_size() const { return predictable_code_size_; }
   void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
 
   // Overwrite a host NaN with a quiet target NaN.  Used by mksnapshot for
   // cross-snapshotting.
   static void QuietNaN(HeapObject* nan) { }
 
+  int pc_offset() const { return static_cast<int>(pc_ - buffer_); }
+
+  static const int kMinimalBufferSize = 4*KB;
+
+ protected:
+  // The buffer into which code and relocation info are generated. It could
+  // either be owned by the assembler or be provided externally.
+  byte* buffer_;
+  int buffer_size_;
+  bool own_buffer_;
+
+  // The program counter, which points into the buffer above and moves forward.
+  byte* pc_;
+
  private:
   Isolate* isolate_;
   int jit_cookie_;
   bool emit_debug_code_;
   bool predictable_code_size_;
 };
 
 
 // Avoids using instructions that vary in size in unpredictable ways between the
 // snapshot and the running VM.
@@ skipping 853 matching lines @@
  public:
   NullCallWrapper() { }
   virtual ~NullCallWrapper() { }
   virtual void BeforeCall(int call_size) const { }
   virtual void AfterCall() const { }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_