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 PpapiBlinkPlatformImpl;
  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   ~PpapiThread() override;
  49   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     FILE_MISSING,
  60     // NOTE: Add new values only immediately above this line.
  61     LOAD_RESULT_MAX  // Boundary value for UMA_HISTOGRAM_ENUMERATION.
  62   };
  63
  64   // ChildThread overrides.
  65   bool Send(IPC::Message* msg) override;
  66   bool OnControlMessageReceived(const IPC::Message& msg) override;
  67   void OnChannelConnected(int32 peer_pid) override;
  68
  69   // PluginDispatcher::PluginDelegate implementation.
  70   std::set<PP_Instance>* GetGloballySeenInstanceIDSet() override;
  71   base::MessageLoopProxy* GetIPCMessageLoop() override;
  72   base::WaitableEvent* GetShutdownEvent() override;
  73   IPC::PlatformFileForTransit ShareHandleWithRemote(
  74       base::PlatformFile handle,
  75       base::ProcessId peer_pid,
  76       bool should_close_source) override;
  77   uint32 Register(ppapi::proxy::PluginDispatcher* plugin_dispatcher) override;
  78   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   IPC::Sender* GetBrowserSender() override;
  84   std::string GetUILanguage() override;
  85   void PreCacheFont(const void* logfontw) override;
  86   void SetActiveURL(const std::string& url) override;
  87   PP_Resource CreateBrowserFont(ppapi::proxy::Connection connection,
  88                                 PP_Instance instance,
  89                                 const PP_BrowserFont_Trusted_Description& desc,
  90                                 const ppapi::Preferences& prefs) override;
  91
  92   // Message handlers.
  93   void OnLoadPlugin(const base::FilePath& path,
  94                     const ppapi::PpapiPermissions& permissions);
  95   void OnCreateChannel(base::ProcessId renderer_pid,
  96                        int renderer_child_id,
  97                        bool incognito);
  98   void OnSetNetworkState(bool online);
  99   void OnCrash();
 100   void OnHang();
 101
 102   // Sets up the channel to the given renderer. On success, returns true and
 103   // fills the given ChannelHandle with the information from the new channel.
 104   bool SetupRendererChannel(base::ProcessId renderer_pid,
 105                             int renderer_child_id,
 106                             bool incognito,
 107                             IPC::ChannelHandle* handle);
 108
 109   // Sets up the name of the plugin for logging using the given path.
 110   void SavePluginName(const base::FilePath& path);
 111
 112   void ReportLoadResult(const base::FilePath& path, LoadResult result);
 113
 114   // Reports |error| to UMA when plugin load fails.
 115   void ReportLoadErrorCode(const base::FilePath& path,
 116                            const base::NativeLibraryLoadError& error);
 117
 118   // True if running in a broker process rather than a normal plugin process.
 119   bool is_broker_;
 120
 121   base::ScopedNativeLibrary library_;
 122
 123   ppapi::PpapiPermissions permissions_;
 124
 125   // Global state tracking for the proxy.
 126   ppapi::proxy::PluginGlobals plugin_globals_;
 127
 128   // Storage for plugin entry points.
 129   PepperPluginInfo::EntryPoints plugin_entry_points_;
 130
 131   // Callback to call when a new instance connects to the broker.
 132   // Used only when is_broker_.
 133   PP_ConnectInstance_Func connect_instance_func_;
 134
 135   // Local concept of the module ID. Some functions take this. It's necessary
 136   // for the in-process PPAPI to handle this properly, but for proxied it's
 137   // unnecessary. The proxy talking to multiple renderers means that each
 138   // renderer has a different idea of what the module ID is for this plugin.
 139   // To force people to "do the right thing" we generate a random module ID
 140   // and pass it around as necessary.
 141   PP_Module local_pp_module_;
 142
 143   // See Dispatcher::Delegate::GetGloballySeenInstanceIDSet.
 144   std::set<PP_Instance> globally_seen_instance_ids_;
 145
 146   // The PluginDispatcher instances contained in the map are not owned by it.
 147   std::map<uint32, ppapi::proxy::PluginDispatcher*> plugin_dispatchers_;
 148   uint32 next_plugin_dispatcher_id_;
 149
 150   // The BlinkPlatformImpl implementation.
 151   scoped_ptr<PpapiBlinkPlatformImpl> blink_platform_impl_;
 152
 153 #if defined(OS_WIN)
 154   // Caches the handle to the peer process if this is a broker.
 155   base::win::ScopedHandle peer_handle_;
 156 #endif
 157
 158   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 159 };
 160
 161 }  // namespace content
 162
 163 #endif  // CONTENT_PPAPI_PLUGIN_PPAPI_THREAD_H_