Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/raw_object.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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 392 matching lines @@
   }
   bool IsFreeListElement() {
     return ((GetClassId() == kFreeListElement));
   }
   bool IsScript() {
     return ((GetClassId() == kScriptCid));
   }
   bool IsFunction() {
     return ((GetClassId() == kFunctionCid));
   }
+  bool IsInstructions() {
+    return ((GetClassId() == kInstructionsCid));
+  }
 
   intptr_t Size() const {
     uword tags = ptr()->tags_;
     intptr_t result = SizeTag::decode(tags);
     if (result != 0) {
       ASSERT(result == SizeFromClass());
       return result;
     }
     result = SizeFromClass();
     ASSERT(result > SizeTag::kMaxSizeTag);
@@ skipping 155 matching lines @@
   friend class RawExternalTypedData;
   friend class RawInstructions;
   friend class RawInstance;
   friend class RawTypedData;
   friend class Scavenger;
   friend class ScavengerVisitor;
   friend class SizeExcludingClassVisitor;  // GetClassId
   friend class RetainingPathVisitor;  // GetClassId
   friend class SkippedCodeFunctions;  // StorePointer
   friend class InstructionsReader;  // tags_ check
+  friend class InstructionsWriter;
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class String;
   friend class TypedData;
   friend class TypedDataView;
   friend class WeakProperty;  // StorePointer
   friend class Instance;  // StorePointer
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(RawObject);
@@ skipping 495 matching lines @@
   static bool ContainsPC(RawObject* raw_obj, uword pc);
 
   friend class RawCode;
   friend class RawFunction;
   friend class Code;
   friend class StackFrame;
   friend class MarkingVisitor;
   friend class SkippedCodeFunctions;
   friend class Function;
   friend class InstructionsReader;
+  friend class InstructionsWriter;
 };
 
 
 class RawPcDescriptors : public RawObject {
  public:
   enum Kind {
     kDeopt           = 1,  // Deoptimization continuation point.
     kIcCall          = kDeopt << 1,  // IC call.
     kUnoptStaticCall = kIcCall << 1,  // Call to a known target via stub.
     kRuntimeCall     = kUnoptStaticCall << 1,  // Runtime call.
@@ skipping 1113 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_