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 358 matching lines @@
   }
   void ClearCanonical() {
     UpdateTagBit<CanonicalObjectTag>(false);
   }
   bool IsVMHeapObject() const {
     return VMHeapObjectTag::decode(ptr()->tags_);
   }
   void SetVMHeapObject() {
     UpdateTagBit<VMHeapObjectTag>(true);
   }
+  void ClearVMHeapObject() {
+    UpdateTagBit<VMHeapObjectTag>(false);
+  }

[siva, 2015/09/15 23:22:01]

This is not used anymore I guess, it can be removed.

[rmacnak, 2015/09/16 01:34:45]

Done.

 
   // Support for GC remembered bit.
   bool IsRemembered() const {
     return RememberedBit::decode(ptr()->tags_);
   }
   void SetRememberedBit() {
     ASSERT(!IsRemembered());
     UpdateTagBit<RememberedBit>(true);
   }
   void SetRememberedBitUnsynchronized() {
@@ skipping 14 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 1626 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_