Reuse empty StoreBufferBlocks.

runtime/vm/isolate.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/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "vm/code_observers.h"
@@ skipping 13 matching lines @@
 #include "vm/os_thread.h"
 #include "vm/parser.h"
 #include "vm/port.h"
 #include "vm/profiler.h"
 #include "vm/reusable_handles.h"
 #include "vm/service.h"
 #include "vm/service_event.h"
 #include "vm/service_isolate.h"
 #include "vm/simulator.h"
 #include "vm/stack_frame.h"
+#include "vm/store_buffer.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 #include "vm/tags.h"
 #include "vm/thread_interrupter.h"
 #include "vm/timer.h"
 #include "vm/visitor.h"
 
 
 namespace dart {
 
@@ skipping 560 matching lines @@
 #else
 #define REUSABLE_HANDLE_SCOPE_INIT(object)
 #endif  // defined(DEBUG)
 
 #define REUSABLE_HANDLE_INITIALIZERS(object)                                   \
   object##_handle_(NULL),
 
 Isolate::Isolate(const Dart_IsolateFlags& api_flags)
   :   mutator_thread_(NULL),
       vm_tag_(0),
-      store_buffer_(),
+      store_buffer_(new StoreBuffer()),
       message_notify_callback_(NULL),
       name_(NULL),
       debugger_name_(NULL),
       start_time_(OS::GetCurrentTimeMicros()),
       main_port_(0),
       origin_id_(0),
       pause_capability_(0),
       terminate_capability_(0),
       errors_fatal_(true),
       heap_(NULL),
@@ skipping 54 matching lines @@
   set_vm_tag(VMTag::kEmbedderTagId);
   set_user_tag(UserTags::kDefaultUserTag);
 }
 
 #undef REUSABLE_HANDLE_SCOPE_INIT
 #undef REUSABLE_HANDLE_INITIALIZERS
 
 Isolate::~Isolate() {
   free(name_);
   free(debugger_name_);
+  delete store_buffer_;
   delete heap_;
   delete object_store_;
   delete api_state_;
   delete stub_code_;
   delete debugger_;
 #if defined(USING_SIMULATOR)
   delete simulator_;
 #endif
   delete mutex_;
   mutex_ = NULL;  // Fail fast if interrupts are scheduled on a dead isolate.
@@ skipping 1327 matching lines @@
                            serialized_message_, serialized_message_len_);
 }
 
 
 void IsolateSpawnState::Cleanup() {
   SwitchIsolateScope switch_scope(I);
   Dart::ShutdownIsolate();
 }
 
 }  // namespace dart