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_impl.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 PpapiBlinkPlatformImpl;
  42
  43 #if defined(COMPILER_MSVC)
  44 // See explanation for other RenderViewHostImpl which is the same issue.
  45 #pragma warning(push)
  46 #pragma warning(disable: 4250)
  47 #endif
  48
  49 class PpapiThread : public ChildThreadImpl,
  50                     public ppapi::proxy::PluginDispatcher::PluginDelegate,
  51                     public ppapi::proxy::PluginProxyDelegate {
  52  public:
  53   PpapiThread(const base::CommandLine& command_line, bool is_broker);
  54   ~PpapiThread() override;
  55   void Shutdown() override;
  56
  57  private:
  58   // Make sure the enum list in tools/histogram/histograms.xml is updated with
  59   // any change in this list.
  60   enum LoadResult {
  61     LOAD_SUCCESS,
  62     LOAD_FAILED,
  63     ENTRY_POINT_MISSING,
  64     INIT_FAILED,
  65     FILE_MISSING,
  66     // NOTE: Add new values only immediately above this line.
  67     LOAD_RESULT_MAX  // Boundary value for UMA_HISTOGRAM_ENUMERATION.
  68   };
  69
  70   // ChildThread overrides.
  71   bool Send(IPC::Message* msg) override;
  72   bool OnControlMessageReceived(const IPC::Message& msg) override;
  73   void OnChannelConnected(int32 peer_pid) override;
  74
  75   // PluginDispatcher::PluginDelegate implementation.
  76   std::set<PP_Instance>* GetGloballySeenInstanceIDSet() override;
  77   base::SingleThreadTaskRunner* GetIPCTaskRunner() override;
  78   base::WaitableEvent* GetShutdownEvent() override;
  79   IPC::PlatformFileForTransit ShareHandleWithRemote(
  80       base::PlatformFile handle,
  81       base::ProcessId peer_pid,
  82       bool should_close_source) override;
  83   uint32 Register(ppapi::proxy::PluginDispatcher* plugin_dispatcher) override;
  84   void Unregister(uint32 plugin_dispatcher_id) override;
  85
  86   // PluginProxyDelegate.
  87   // SendToBrowser() is intended to be safe to use on another thread so
  88   // long as the main PpapiThread outlives it.
  89   IPC::Sender* GetBrowserSender() override;
  90   std::string GetUILanguage() override;
  91   void PreCacheFont(const void* logfontw) override;
  92   void SetActiveURL(const std::string& url) override;
  93   PP_Resource CreateBrowserFont(ppapi::proxy::Connection connection,
  94                                 PP_Instance instance,
  95                                 const PP_BrowserFont_Trusted_Description& desc,
  96                                 const ppapi::Preferences& prefs) override;
  97
  98   // Message handlers.
  99   void OnLoadPlugin(const base::FilePath& path,
 100                     const ppapi::PpapiPermissions& permissions);
 101   void OnCreateChannel(base::ProcessId renderer_pid,
 102                        int renderer_child_id,
 103                        bool incognito);
 104   void OnSetNetworkState(bool online);
 105   void OnCrash();
 106   void OnHang();
 107
 108   // Sets up the channel to the given renderer. On success, returns true and
 109   // fills the given ChannelHandle with the information from the new channel.
 110   bool SetupRendererChannel(base::ProcessId renderer_pid,
 111                             int renderer_child_id,
 112                             bool incognito,
 113                             IPC::ChannelHandle* handle);
 114
 115   // Sets up the name of the plugin for logging using the given path.
 116   void SavePluginName(const base::FilePath& path);
 117
 118   void ReportLoadResult(const base::FilePath& path, LoadResult result);
 119
 120   // Reports |error| to UMA when plugin load fails.
 121   void ReportLoadErrorCode(const base::FilePath& path,
 122                            const base::NativeLibraryLoadError& error);
 123
 124   // True if running in a broker process rather than a normal plugin process.
 125   bool is_broker_;
 126
 127   base::ScopedNativeLibrary library_;
 128
 129   ppapi::PpapiPermissions permissions_;
 130
 131   // Global state tracking for the proxy.
 132   ppapi::proxy::PluginGlobals plugin_globals_;
 133
 134   // Storage for plugin entry points.
 135   PepperPluginInfo::EntryPoints plugin_entry_points_;
 136
 137   // Callback to call when a new instance connects to the broker.
 138   // Used only when is_broker_.
 139   PP_ConnectInstance_Func connect_instance_func_;
 140
 141   // Local concept of the module ID. Some functions take this. It's necessary
 142   // for the in-process PPAPI to handle this properly, but for proxied it's
 143   // unnecessary. The proxy talking to multiple renderers means that each
 144   // renderer has a different idea of what the module ID is for this plugin.
 145   // To force people to "do the right thing" we generate a random module ID
 146   // and pass it around as necessary.
 147   PP_Module local_pp_module_;
 148
 149   // See Dispatcher::Delegate::GetGloballySeenInstanceIDSet.
 150   std::set<PP_Instance> globally_seen_instance_ids_;
 151
 152   // The PluginDispatcher instances contained in the map are not owned by it.
 153   std::map<uint32, ppapi::proxy::PluginDispatcher*> plugin_dispatchers_;
 154   uint32 next_plugin_dispatcher_id_;
 155
 156   // The BlinkPlatformImpl implementation.
 157   scoped_ptr<PpapiBlinkPlatformImpl> blink_platform_impl_;
 158
 159 #if defined(OS_WIN)
 160   // Caches the handle to the peer process if this is a broker.
 161   base::win::ScopedHandle peer_handle_;
 162 #endif
 163
 164   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 165 };
 166
 167 #if defined(COMPILER_MSVC)
 168 #pragma warning(pop)
 169 #endif
 170
 171 }  // namespace content
 172
 173 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_