Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 476 matching lines @@
     ASSERT(vm_isolate_snapshot_object_table_ != NULL);
     return *vm_isolate_snapshot_object_table_;
   }
   static void InitVmIsolateSnapshotObjectTable(intptr_t len);
   static const uint8_t* instructions_snapshot_buffer() {
     return instructions_snapshot_buffer_;
   }
   static void set_instructions_snapshot_buffer(const uint8_t* buffer) {
     instructions_snapshot_buffer_ = buffer;
   }
+  static bool IsRunningPrecompiledCode() {
+    return instructions_snapshot_buffer != NULL;

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

instructions_snapshot_buffer_

[rmacnak, 2015/09/16 01:34:44]

Done.

+  }

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

We should move instructions_snapshot_buffer_ field to 'class Dart' so that the
code is more readable when using
Dart::IsRunningPrecompiledCode() instead of Object::IsRunningPrecompiledCode().

 
   static RawClass* class_class() { return class_class_; }
   static RawClass* dynamic_class() { return dynamic_class_; }
   static RawClass* void_class() { return void_class_; }
   static RawType* dynamic_type() { return dynamic_type_; }
   static RawType* void_type() { return void_type_; }
   static RawClass* unresolved_class_class() { return unresolved_class_class_; }
   static RawClass* type_arguments_class() { return type_arguments_class_; }
   static RawClass* patch_class_class() { return patch_class_class_; }
   static RawClass* function_class() { return function_class_; }
@@ skipping 3258 matching lines @@
 
   // New is a private method as RawInstruction and RawCode objects should
   // only be created using the Code::FinalizeCode method. This method creates
   // the RawInstruction and RawCode objects, sets up the pointer offsets
   // and links the two in a GC safe manner.
   static RawInstructions* New(intptr_t size);
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Instructions, Object);
   friend class Class;
   friend class Code;
+  friend class InstructionsWriter;
 };
 
 
 class LocalVarDescriptors : public Object {
  public:
   intptr_t Length() const;
 
   RawString* GetName(intptr_t var_index) const;
 
   void SetVar(intptr_t var_index,
@@ skipping 4344 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_