First step towards splitting a full snapshot into a vm isolate snapshot and a

runtime/vm/dart.cc

 // 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.
 
 #include "vm/dart.h"
 
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
@@ skipping 57 matching lines @@
   ReadOnlyHandles() { }
 
  private:
   VMHandles handles_;
 
   friend class Dart;
   DISALLOW_COPY_AND_ASSIGN(ReadOnlyHandles);
 };
 
 
-const char* Dart::InitOnce(Dart_IsolateCreateCallback create,
+const char* Dart::InitOnce(const uint8_t* vm_isolate_snapshot,
+                           Dart_IsolateCreateCallback create,
                            Dart_IsolateInterruptCallback interrupt,
                            Dart_IsolateUnhandledExceptionCallback unhandled,
                            Dart_IsolateShutdownCallback shutdown,
                            Dart_FileOpenCallback file_open,
                            Dart_FileReadCallback file_read,
                            Dart_FileWriteCallback file_write,
                            Dart_FileCloseCallback file_close,
                            Dart_EntropySource entropy_source) {
   // TODO(iposva): Fix race condition here.
   if (vm_isolate_ != NULL || !Flags::Initialized()) {
@@ skipping 42 matching lines @@
     // Now that the needed stub has been generated, set the stack limit.
     vm_isolate_->InitializeStackLimit();
     Symbols::InitOnce(vm_isolate_);
     Scanner::InitOnce();
 #if defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
     // Dart VM requires at least SSE2.
     if (!TargetCPUFeatures::sse2_supported()) {
       return "SSE2 is required.";
     }
 #endif
+    if (vm_isolate_snapshot != NULL) {
+      FATAL("Initializing the VM isolate from a snapshot is not implemented\n");
+    }
     Object::FinalizeVMIsolate(vm_isolate_);
   }
   // There is a planned and known asymmetry here: We enter one scope for the VM
   // isolate so that we can allocate the "persistent" scoped handles for the
   // predefined API values (such as Dart_True, Dart_False and Dart_Null).
   Dart_EnterScope();
   Api::InitHandles();
 
   Isolate::SetCurrent(NULL);  // Unregister the VM isolate from this thread.
   Isolate::SetCreateCallback(create);
@@ skipping 162 matching lines @@
   return predefined_handles_->handles_.AllocateScopedHandle();
 }
 
 
 bool Dart::IsReadOnlyHandle(uword address) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 }  // namespace dart