Changes to shrink the token stream representation from two words to one word.

vm/dart.cc

 // 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.
 
 #include "vm/dart.h"
 
 #include "vm/code_index_table.h"
 #include "vm/dart_api_state.h"
 #include "vm/flags.h"
 #include "vm/freelist.h"
 #include "vm/handles.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/port.h"
 #include "vm/snapshot.h"
 #include "vm/stub_code.h"
 #include "vm/virtual_memory.h"
 #include "vm/zone.h"
 
 namespace dart {
 
+DECLARE_FLAG(bool, trace_isolates);
+
 Isolate* Dart::vm_isolate_ = NULL;
 DebugInfo* Dart::pprof_symbol_generator_ = NULL;
 
 bool Dart::InitOnce(Dart_IsolateCreateCallback create,
                     Dart_IsolateInterruptCallback interrupt) {
   // TODO(iposva): Fix race condition here.
   if (vm_isolate_ != NULL || !Flags::Initialized()) {
     return false;
   }
   OS::InitOnce();
@@ skipping 43 matching lines @@
   if (snapshot_buffer == NULL) {
     const Error& error = Error::Handle(Object::Init(isolate));
     if (!error.IsNull()) {
       return error.raw();
     }
   } else {
     // Initialize from snapshot (this should replicate the functionality
     // of Object::Init(..) in a regular isolate creation path.
     Object::InitFromSnapshot(isolate);
     const Snapshot* snapshot = Snapshot::SetupFromBuffer(snapshot_buffer);
+    if (FLAG_trace_isolates) {
+      OS::Print("Size of isolate snapshot = %ld\n", snapshot->length());
+    }
     SnapshotReader reader(snapshot, isolate);
     reader.ReadFullSnapshot();
   }
 
   StubCode::Init(isolate);
   CodeIndexTable::Init(isolate);
   isolate->set_init_callback_data(data);
   return Error::null();
 }
 
 
 void Dart::ShutdownIsolate() {
   Isolate* isolate = Isolate::Current();
   isolate->Shutdown();
   delete isolate;
 }
 
 }  // namespace dart