Option to output precompiled instructions as a blob for use with mmap instead of assembly for use i…

runtime/vm/datastream.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.
 
 #ifndef VM_DATASTREAM_H_
 #define VM_DATASTREAM_H_
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/allocation.h"
@@ skipping 369 matching lines @@
 
   void WriteBytes(const uint8_t* addr, intptr_t len) {
     if ((end_ - current_) < len) {
       Resize(len);
     }
     ASSERT((end_ - current_) >= len);
     memmove(current_, addr, len);
     current_ += len;
   }
 
+  void WriteWord(uword value) {
+    const intptr_t len = sizeof(uword);
+    if ((end_ - current_) < len) {
+      Resize(len);
+    }
+    ASSERT((end_ - current_) >= len);
+    *reinterpret_cast<uword*>(current_) = value;
+    current_ += len;
+  }
+
   void Print(const char* format, ...) {
     va_list args;
     va_start(args, format);
     VPrint(format, args);
   }
 
  private:
   template<typename T>
   void Write(T value) {
     T v = value;
@@ skipping 62 matching lines @@
   intptr_t current_size_;
   ReAlloc alloc_;
   intptr_t initial_size_;
 
   DISALLOW_COPY_AND_ASSIGN(WriteStream);
 };
 
 }  // namespace dart
 
 #endif  // VM_DATASTREAM_H_