Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/raw_object.h

Index: runtime/vm/raw_object.h
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index bacbfe82f274c3c6a75c35a24193d29ad6a0dc1d..5acef3d930afd3bf7639c26fbeec10f4d9e3965d 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -376,6 +376,9 @@ class RawObject {
   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 {
@@ -410,6 +413,9 @@ class RawObject {
   bool IsFunction() {
     return ((GetClassId() == kFunctionCid));
   }
+  bool IsInstructions() {
+    return ((GetClassId() == kInstructionsCid));
+  }
 
   intptr_t Size() const {
     uword tags = ptr()->tags_;
@@ -585,6 +591,7 @@ class RawObject {
   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;