Implement basic crash detection and shutdown handling for out of process PPAP...

webkit/plugins/ppapi/resource_tracker.h

 // Copyright (c) 2010 The Chromium 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 WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_
 #define WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_
 
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 69 matching lines @@
   // PP_Instances --------------------------------------------------------------
 
   // Adds a new plugin instance to the list of tracked instances, and returns a
   // new instance handle to identify it.
   PP_Instance AddInstance(PluginInstance* instance);
 
   // Called when a plugin instance was deleted and should no longer be tracked.
   // The given handle should be one generated by AddInstance.
   void InstanceDeleted(PP_Instance instance);
 
+  void InstanceCrashed(PP_Instance instance);
+
   // Returns a pointer to the plugin instance object associated with the given
-  // instance handle. The return value will be NULL if the handle is invalid.
+  // instance handle. The return value will be NULL if the handle is invalid or
+  // if the instance has crashed.
   PluginInstance* GetInstance(PP_Instance instance);
 
  private:
   friend struct base::DefaultLazyInstanceTraits<ResourceTracker>;
   friend class Resource;
   friend class ResourceTrackerTest;
   friend class Var;
 
   typedef std::set<PP_Resource> ResourceSet;
 
   // Indexed by the var ID.
   typedef std::set<int32> VarSet;
 
   // Per-instance data we track.
   struct InstanceData;
 
   // Prohibit creation other then by the Singleton class.
   ResourceTracker();
   ~ResourceTracker();
 
   // Adds the given resource to the tracker and assigns it a resource ID and
   // refcount of 1. The assigned resource ID will be returned. Used only by the
   // Resource class.
   PP_Resource AddResource(Resource* resource);
 
   // The same as AddResource but for Var, and returns the new Var ID.
   int32 AddVar(Var* var);
 
+  // Force frees all vars and resources associated with the given instance.
+  // If delete_instance is true, the instance tracking information will also
+  // be deleted.
+  void CleanupInstanceData(PP_Instance instance, bool delete_instance);
+
   // Overrides the singleton object. This is used for tests which want to
   // specify their own tracker (otherwise, you can get cross-talk between
   // tests since the data will live into the subsequent tests).
   static void SetSingletonOverride(ResourceTracker* tracker);
   static void ClearSingletonOverride();
 
   // See SetSingletonOverride above.
   static ResourceTracker* singleton_override_;
 
   // Last assigned resource & var ID.
@@ skipping 24 matching lines @@
   typedef std::map<PP_Module, PluginModule*> ModuleMap;
   ModuleMap module_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceTracker);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_