Fix cluster-fuzz regression when getting message from Worker

src/d8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_D8_H_
 #define V8_D8_H_
 
 #ifndef V8_SHARED
 #include "src/allocation.h"
 #include "src/hashmap.h"
@@ skipping 239 matching lines @@
     explicit WorkerThread(Worker* worker)
         : base::Thread(base::Thread::Options("WorkerThread")),
           worker_(worker) {}
 
     virtual void Run() { worker_->ExecuteInThread(); }
 
    private:
     Worker* worker_;
   };
 
+  enum State { IDLE, RUNNING, TERMINATED };
+
   void ExecuteInThread();
   void Cleanup();
   static void PostMessageOut(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   base::Semaphore in_semaphore_;
   base::Semaphore out_semaphore_;
   SerializationDataQueue in_queue_;
   SerializationDataQueue out_queue_;
   base::Thread* thread_;
   char* script_;
+  base::Atomic32 state_;
 };
 #endif  // !V8_SHARED
 
 
 class ShellOptions {
  public:
   ShellOptions()
       : script_executed(false),
         last_run(true),
         send_idle_notification(false),
@@ skipping 174 matching lines @@
 #ifndef V8_SHARED
   static Persistent<Context> utility_context_;
   static CounterMap* counter_map_;
   // We statically allocate a set of local counters to be used if we
   // don't want to store the stats in a memory-mapped file
   static CounterCollection local_counters_;
   static CounterCollection* counters_;
   static base::OS::MemoryMappedFile* counters_file_;
   static base::Mutex context_mutex_;
   static const base::TimeTicks kInitialTicks;
+
+  static base::Mutex workers_mutex_;
+  static bool allow_new_workers_;
   static i::List<Worker*> workers_;
   static i::List<SharedArrayBuffer::Contents> externalized_shared_contents_;
 
   static Counter* GetCounter(const char* name, bool is_histogram);
   static void InstallUtilityScript(Isolate* isolate);
 #endif  // !V8_SHARED
   static void Initialize(Isolate* isolate);
   static void InitializeDebugger(Isolate* isolate);
   static void RunShell(Isolate* isolate);
   static bool SetOptions(int argc, char* argv[]);
   static Handle<ObjectTemplate> CreateGlobalTemplate(Isolate* isolate);
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_D8_H_