Last snapshot bits to get working precompiled hello_world on x64.

runtime/vm/isolate.h

 // Copyright (c) 2013, 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_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 248 matching lines @@
   void InitializeStackLimit();
   void SetStackLimit(uword value);
   void SetStackLimitFromStackBase(uword stack_base);
   void ClearStackLimit();
 
   // Returns the current C++ stack pointer. Equivalent taking the address of a
   // stack allocated local, but plays well with AddressSanitizer.
   // TODO(koda): Move to Thread.
   static uword GetCurrentStackPointer();
 
+  void SetupInstructionsSnapshotPage(const uint8_t* instructions_snapshot);
+
   // Returns true if any of the interrupts specified by 'interrupt_bits' are
   // currently scheduled for this isolate, but leaves them unchanged.
   //
   // NOTE: The read uses relaxed memory ordering, i.e., it is atomic and
   // an interrupt is guaranteed to be observed eventually, but any further
   // order guarantees must be ensured by other synchronization. See the
   // tests in isolate_test.cc for example usage.
   bool HasInterruptsScheduled(uword interrupt_bits) {
     ASSERT(interrupt_bits == (interrupt_bits & kInterruptsMask));
     uword limit = AtomicOperations::LoadRelaxed(&stack_limit_);
@@ skipping 841 matching lines @@
   uint8_t* serialized_message_;
   intptr_t serialized_message_len_;
   Isolate::Flags isolate_flags_;
   bool paused_;
   bool errors_are_fatal_;
 };
 
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_