VM: Fix an app-jit related shutdown race.

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 RUNTIME_VM_ISOLATE_H_
 #define RUNTIME_VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 381 matching lines @@
     return create_callback_;
   }
 
   static void SetShutdownCallback(Dart_IsolateShutdownCallback cb) {
     shutdown_callback_ = cb;
   }
   static Dart_IsolateShutdownCallback ShutdownCallback() {
     return shutdown_callback_;
   }
 
+  static void SetCleanupCallback(Dart_IsolateCleanupCallback cb) {
+    cleanup_callback_ = cb;
+  }
+  static Dart_IsolateCleanupCallback CleanupCallback() {
+    return cleanup_callback_;
+  }
+
+
   void set_object_id_ring(ObjectIdRing* ring) { object_id_ring_ = ring; }
   ObjectIdRing* object_id_ring() { return object_id_ring_; }
 
   void AddPendingDeopt(uword fp, uword pc);
   uword FindPendingDeopt(uword fp) const;
   void ClearPendingDeoptsAtOrBelow(uword fp) const;
   MallocGrowableArray<PendingLazyDeopt>* pending_deopts() const {
     return pending_deopts_;
   }
   bool IsDeoptimizing() const { return deopt_context_ != NULL; }
@@ skipping 432 matching lines @@
   intptr_t reload_every_n_stack_overflow_checks_;
   IsolateReloadContext* reload_context_;
   int64_t last_reload_timestamp_;
   // Should we pause in the debug message loop after this request?
   bool should_pause_post_service_request_;
 
   HandlerInfoCache handler_info_cache_;
 
   static Dart_IsolateCreateCallback create_callback_;
   static Dart_IsolateShutdownCallback shutdown_callback_;
+  static Dart_IsolateCleanupCallback cleanup_callback_;
 
   static void WakePauseEventHandler(Dart_Isolate isolate);
 
   // Manage list of existing isolates.
   static bool AddIsolateToList(Isolate* isolate);
   static void RemoveIsolateFromList(Isolate* isolate);
 
   // This monitor protects isolates_list_head_, and creation_enabled_.
   static Monitor* isolates_list_monitor_;
   static Isolate* isolates_list_head_;
@@ skipping 141 matching lines @@
   intptr_t* spawn_count_;
 
   Dart_IsolateFlags isolate_flags_;
   bool paused_;
   bool errors_are_fatal_;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_ISOLATE_H_