Don't use IsolateData for the exit hook as multiple embedders share the dart/bin while using differ…

runtime/bin/process.h

 // 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.
 
 #ifndef RUNTIME_BIN_PROCESS_H_
 #define RUNTIME_BIN_PROCESS_H_
 
 #include "bin/builtin.h"
 #include "bin/io_buffer.h"
 #include "bin/lockers.h"
@@ skipping 108 matching lines @@
   static int GlobalExitCode() {
     MutexLocker ml(global_exit_code_mutex_);
     return global_exit_code_;
   }
 
   static void SetGlobalExitCode(int exit_code) {
     MutexLocker ml(global_exit_code_mutex_);
     global_exit_code_ = exit_code;
   }
 
+  typedef void (*ExitHook)(int64_t exit_code);
+  static void SetExitHook(ExitHook hook) {
+    exit_hook_ = hook;
+  }
+  static void RunExitHook(int64_t exit_code) {
+    if (exit_hook_ != NULL) {
+      exit_hook_(exit_code);
+    }
+  }
+
   static intptr_t CurrentProcessId();
 
   static intptr_t SetSignalHandler(intptr_t signal);
   static void ClearSignalHandler(intptr_t signal);
 
   static Dart_Handle GetProcessIdNativeField(Dart_Handle process,
                                              intptr_t* pid);
   static Dart_Handle SetProcessIdNativeField(Dart_Handle process,
                                              intptr_t pid);
 
  private:
   static int global_exit_code_;
   static Mutex* global_exit_code_mutex_;
+  static ExitHook exit_hook_;
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Process);
 };
 
 
 class SignalInfo {
  public:
   SignalInfo(intptr_t fd, intptr_t signal, SignalInfo* next)
       : fd_(fd),
@@ skipping 136 matching lines @@
   intptr_t free_size_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BufferListBase);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // RUNTIME_BIN_PROCESS_H_