content/ppapi_plugin/ppapi_thread.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
   6 #define CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/process/process.h"
  15 #include "base/scoped_native_library.h"
  16 #include "build/build_config.h"
  17 #include "content/child/child_thread.h"
  18 #include "content/public/common/pepper_plugin_info.h"
  19 #include "ppapi/c/pp_module.h"
  20 #include "ppapi/c/trusted/ppp_broker.h"
  21 #include "ppapi/proxy/connection.h"
  22 #include "ppapi/proxy/plugin_dispatcher.h"
  23 #include "ppapi/proxy/plugin_globals.h"
  24 #include "ppapi/proxy/plugin_proxy_delegate.h"
  25
  26 #if defined(OS_WIN)
  27 #include "base/win/scoped_handle.h"
  28 #endif
  29
  30 namespace base {
  31 class CommandLine;
  32 class FilePath;
  33 }
  34
  35 namespace IPC {
  36 struct ChannelHandle;
  37 }
  38
  39 namespace content {
  40
  41 class PpapiWebKitPlatformSupportImpl;
  42
  43 class PpapiThread : public ChildThread,
  44                     public ppapi::proxy::PluginDispatcher::PluginDelegate,
  45                     public ppapi::proxy::PluginProxyDelegate {
  46  public:
  47   PpapiThread(const base::CommandLine& command_line, bool is_broker);
  48   virtual ~PpapiThread();
  49   virtual void Shutdown() OVERRIDE;
  50
  51  private:
  52   // Make sure the enum list in tools/histogram/histograms.xml is updated with
  53   // any change in this list.
  54   enum LoadResult {
  55     LOAD_SUCCESS,
  56     LOAD_FAILED,
  57     ENTRY_POINT_MISSING,
  58     INIT_FAILED,
  59     // NOTE: Add new values only immediately above this line.
  60     LOAD_RESULT_MAX  // Boundary value for UMA_HISTOGRAM_ENUMERATION.
  61   };
  62
  63   // ChildThread overrides.
  64   virtual bool Send(IPC::Message* msg) OVERRIDE;
  65   virtual bool OnControlMessageReceived(const IPC::Message& msg) OVERRIDE;
  66   virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
  67
  68   // PluginDispatcher::PluginDelegate implementation.
  69   virtual std::set<PP_Instance>* GetGloballySeenInstanceIDSet() OVERRIDE;
  70   virtual base::MessageLoopProxy* GetIPCMessageLoop() OVERRIDE;
  71   virtual base::WaitableEvent* GetShutdownEvent() OVERRIDE;
  72   virtual IPC::PlatformFileForTransit ShareHandleWithRemote(
  73       base::PlatformFile handle,
  74       base::ProcessId peer_pid,
  75       bool should_close_source) OVERRIDE;
  76   virtual uint32 Register(
  77       ppapi::proxy::PluginDispatcher* plugin_dispatcher) OVERRIDE;
  78   virtual void Unregister(uint32 plugin_dispatcher_id) OVERRIDE;
  79
  80   // PluginProxyDelegate.
  81   // SendToBrowser() is intended to be safe to use on another thread so
  82   // long as the main PpapiThread outlives it.
  83   virtual IPC::Sender* GetBrowserSender() OVERRIDE;
  84   virtual std::string GetUILanguage() OVERRIDE;
  85   virtual void PreCacheFont(const void* logfontw) OVERRIDE;
  86   virtual void SetActiveURL(const std::string& url) OVERRIDE;
  87   virtual PP_Resource CreateBrowserFont(
  88       ppapi::proxy::Connection connection,
  89       PP_Instance instance,
  90       const PP_BrowserFont_Trusted_Description& desc,
  91       const ppapi::Preferences& prefs) OVERRIDE;
  92
  93   // Message handlers.
  94   void OnLoadPlugin(const base::FilePath& path,
  95                     const ppapi::PpapiPermissions& permissions);
  96   void OnCreateChannel(base::ProcessId renderer_pid,
  97                        int renderer_child_id,
  98                        bool incognito);
  99   void OnSetNetworkState(bool online);
 100   void OnCrash();
 101   void OnHang();
 102
 103   // Sets up the channel to the given renderer. On success, returns true and
 104   // fills the given ChannelHandle with the information from the new channel.
 105   bool SetupRendererChannel(base::ProcessId renderer_pid,
 106                             int renderer_child_id,
 107                             bool incognito,
 108                             IPC::ChannelHandle* handle);
 109
 110   // Sets up the name of the plugin for logging using the given path.
 111   void SavePluginName(const base::FilePath& path);
 112
 113   void ReportLoadResult(const base::FilePath& path, LoadResult result);
 114
 115   // Reports |error| to UMA when plugin load fails.
 116   void ReportLoadErrorCode(const base::FilePath& path,
 117                            const base::NativeLibraryLoadError& error);
 118
 119   // True if running in a broker process rather than a normal plugin process.
 120   bool is_broker_;
 121
 122   base::ScopedNativeLibrary library_;
 123
 124   ppapi::PpapiPermissions permissions_;
 125
 126   // Global state tracking for the proxy.
 127   ppapi::proxy::PluginGlobals plugin_globals_;
 128
 129   // Storage for plugin entry points.
 130   PepperPluginInfo::EntryPoints plugin_entry_points_;
 131
 132   // Callback to call when a new instance connects to the broker.
 133   // Used only when is_broker_.
 134   PP_ConnectInstance_Func connect_instance_func_;
 135
 136   // Local concept of the module ID. Some functions take this. It's necessary
 137   // for the in-process PPAPI to handle this properly, but for proxied it's
 138   // unnecessary. The proxy talking to multiple renderers means that each
 139   // renderer has a different idea of what the module ID is for this plugin.
 140   // To force people to "do the right thing" we generate a random module ID
 141   // and pass it around as necessary.
 142   PP_Module local_pp_module_;
 143
 144   // See Dispatcher::Delegate::GetGloballySeenInstanceIDSet.
 145   std::set<PP_Instance> globally_seen_instance_ids_;
 146
 147   // The PluginDispatcher instances contained in the map are not owned by it.
 148   std::map<uint32, ppapi::proxy::PluginDispatcher*> plugin_dispatchers_;
 149   uint32 next_plugin_dispatcher_id_;
 150
 151   // The WebKitPlatformSupport implementation.
 152   scoped_ptr<PpapiWebKitPlatformSupportImpl> webkit_platform_support_;
 153
 154 #if defined(OS_WIN)
 155   // Caches the handle to the peer process if this is a broker.
 156   base::win::ScopedHandle peer_handle_;
 157 #endif
 158
 159   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 160 };
 161
 162 }  // namespace content
 163
 164 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_