components/nacl/browser/nacl_process_host.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 COMPONENTS_NACL_BROWSER_NACL_PROCESS_HOST_H_
   6 #define COMPONENTS_NACL_BROWSER_NACL_PROCESS_HOST_H_
   7
   8 #include "build/build_config.h"
   9
  10 #include "base/files/file.h"
  11 #include "base/files/file_path.h"
  12 #include "base/files/file_util_proxy.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/shared_memory.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "base/message_loop/message_loop.h"
  17 #include "base/process/process.h"
  18 #include "components/nacl/common/nacl_types.h"
  19 #include "content/public/browser/browser_child_process_host_delegate.h"
  20 #include "content/public/browser/browser_child_process_host_iterator.h"
  21 #include "ipc/ipc_channel_handle.h"
  22 #include "native_client/src/public/nacl_file_info.h"
  23 #include "net/socket/socket_descriptor.h"
  24 #include "ppapi/shared_impl/ppapi_permissions.h"
  25 #include "url/gurl.h"
  26
  27 namespace content {
  28 class BrowserChildProcessHost;
  29 class BrowserPpapiHost;
  30 }
  31
  32 namespace IPC {
  33 class ChannelProxy;
  34 }
  35
  36 namespace nacl {
  37
  38 class NaClHostMessageFilter;
  39 void* AllocateAddressSpaceASLR(base::ProcessHandle process, size_t size);
  40
  41 // Represents the browser side of the browser <--> NaCl communication
  42 // channel. There will be one NaClProcessHost per NaCl process
  43 // The browser is responsible for starting the NaCl process
  44 // when requested by the renderer.
  45 // After that, most of the communication is directly between NaCl plugin
  46 // running in the renderer and NaCl processes.
  47 class NaClProcessHost : public content::BrowserChildProcessHostDelegate {
  48  public:
  49   // manifest_url: the URL of the manifest of the Native Client plugin being
  50   // executed.
  51   // nexe_file: A file that corresponds to the nexe module to be loaded.
  52   // nexe_token: A cache validation token for nexe_file.
  53   // permissions: PPAPI permissions, to control access to private APIs.
  54   // render_view_id: RenderView routing id, to control access to private APIs.
  55   // permission_bits: controls which interfaces the NaCl plugin can use.
  56   // uses_nonsfi_mode: whether the program should be loaded under non-SFI mode.
  57   // off_the_record: was the process launched from an incognito renderer?
  58   // process_type: the type of NaCl process.
  59   // profile_directory: is the path of current profile directory.
  60   NaClProcessHost(const GURL& manifest_url,
  61                   base::File nexe_file,
  62                   const NaClFileToken& nexe_token,
  63                   ppapi::PpapiPermissions permissions,
  64                   int render_view_id,
  65                   uint32 permission_bits,
  66                   bool uses_nonsfi_mode,
  67                   bool off_the_record,
  68                   NaClAppProcessType process_type,
  69                   const base::FilePath& profile_directory);
  70   ~NaClProcessHost() override;
  71
  72   void OnProcessCrashed(int exit_status) override;
  73
  74   // Do any minimal work that must be done at browser startup.
  75   static void EarlyStartup();
  76
  77   // Specifies throttling time in milliseconds for PpapiHostMsg_Keepalive IPCs.
  78   static void SetPpapiKeepAliveThrottleForTesting(unsigned milliseconds);
  79
  80   // Initialize the new NaCl process. Result is returned by sending ipc
  81   // message reply_msg.
  82   void Launch(NaClHostMessageFilter* nacl_host_message_filter,
  83               IPC::Message* reply_msg,
  84               const base::FilePath& manifest_path);
  85
  86   void OnChannelConnected(int32 peer_pid) override;
  87
  88 #if defined(OS_WIN)
  89   void OnProcessLaunchedByBroker(base::ProcessHandle handle);
  90   void OnDebugExceptionHandlerLaunchedByBroker(bool success);
  91 #endif
  92
  93   bool Send(IPC::Message* msg);
  94
  95   content::BrowserChildProcessHost* process() { return process_.get(); }
  96   content::BrowserPpapiHost* browser_ppapi_host() { return ppapi_host_.get(); }
  97
  98  private:
  99   bool LaunchNaClGdb();
 100
 101   // Mark the process as using a particular GDB debug stub port and notify
 102   // listeners (if the port is not kGdbDebugStubPortUnknown).
 103   void SetDebugStubPort(int port);
 104
 105 #if defined(OS_POSIX)
 106   // Create bound TCP socket in the browser process so that the NaCl GDB debug
 107   // stub can use it to accept incoming connections even when the Chrome sandbox
 108   // is enabled.
 109   net::SocketDescriptor GetDebugStubSocketHandle();
 110 #endif
 111
 112 #if defined(OS_WIN)
 113   // Called when the debug stub port has been selected.
 114   void OnDebugStubPortSelected(uint16_t debug_stub_port);
 115 #endif
 116
 117   bool LaunchSelLdr();
 118
 119   // BrowserChildProcessHostDelegate implementation:
 120   bool OnMessageReceived(const IPC::Message& msg) override;
 121   void OnProcessLaunched() override;
 122
 123   void OnResourcesReady();
 124
 125   // Enable the PPAPI proxy only for NaCl processes corresponding to a renderer.
 126   bool enable_ppapi_proxy() { return render_view_id_ != 0; }
 127
 128   // Sends the reply message to the renderer who is waiting for the plugin
 129   // to load. Returns true on success.
 130   bool ReplyToRenderer(
 131       const IPC::ChannelHandle& ppapi_channel_handle,
 132       const IPC::ChannelHandle& trusted_channel_handle,
 133       const IPC::ChannelHandle& manifest_service_channel_handle);
 134
 135   // Sends the reply with error message to the renderer.
 136   void SendErrorToRenderer(const std::string& error_message);
 137
 138   // Sends the reply message to the renderer. Either result or
 139   // error message must be empty.
 140   void SendMessageToRenderer(const NaClLaunchResult& result,
 141                              const std::string& error_message);
 142
 143   // Sends the message to the NaCl process to load the plugin. Returns true
 144   // on success.
 145   bool StartNaClExecution();
 146
 147   void StartNaClFileResolved(
 148       NaClStartParams params,
 149       const base::FilePath& file_path,
 150       base::File nexe_file);
 151
 152   // Does post-process-launching tasks for starting the NaCl process once
 153   // we have a connection.
 154   //
 155   // Returns false on failure.
 156   bool StartWithLaunchedProcess();
 157
 158   // Message handlers for validation caching.
 159   void OnQueryKnownToValidate(const std::string& signature, bool* result);
 160   void OnSetKnownToValidate(const std::string& signature);
 161   void OnResolveFileToken(uint64 file_token_lo, uint64 file_token_hi);
 162   void FileResolved(uint64_t file_token_lo,
 163                     uint64_t file_token_hi,
 164                     const base::FilePath& file_path,
 165                     base::File file);
 166 #if defined(OS_WIN)
 167   // Message handler for Windows hardware exception handling.
 168   void OnAttachDebugExceptionHandler(const std::string& info,
 169                                      IPC::Message* reply_msg);
 170   bool AttachDebugExceptionHandler(const std::string& info,
 171                                    IPC::Message* reply_msg);
 172 #endif
 173
 174   // Called when the PPAPI IPC channels to the browser/renderer have been
 175   // created.
 176   void OnPpapiChannelsCreated(
 177       const IPC::ChannelHandle& browser_channel_handle,
 178       const IPC::ChannelHandle& ppapi_renderer_channel_handle,
 179       const IPC::ChannelHandle& trusted_renderer_channel_handle,
 180       const IPC::ChannelHandle& manifest_service_channel_handle);
 181
 182   GURL manifest_url_;
 183   base::File nexe_file_;
 184   NaClFileToken nexe_token_;
 185
 186   ppapi::PpapiPermissions permissions_;
 187
 188 #if defined(OS_WIN)
 189   // This field becomes true when the broker successfully launched
 190   // the NaCl loader.
 191   bool process_launched_by_broker_;
 192 #endif
 193   // The NaClHostMessageFilter that requested this NaCl process.  We use
 194   // this for sending the reply once the process has started.
 195   scoped_refptr<NaClHostMessageFilter> nacl_host_message_filter_;
 196
 197   // The reply message to send. We must always send this message when the
 198   // sub-process either succeeds or fails to unblock the renderer waiting for
 199   // the reply. NULL when there is no reply to send.
 200   IPC::Message* reply_msg_;
 201 #if defined(OS_WIN)
 202   bool debug_exception_handler_requested_;
 203   scoped_ptr<IPC::Message> attach_debug_exception_handler_reply_msg_;
 204 #endif
 205
 206   // The file path to the manifest is passed to nacl-gdb when it is used to
 207   // debug the NaCl loader.
 208   base::FilePath manifest_path_;
 209
 210   scoped_ptr<content::BrowserChildProcessHost> process_;
 211
 212   bool uses_nonsfi_mode_;
 213
 214   bool enable_debug_stub_;
 215   bool enable_crash_throttling_;
 216   bool off_the_record_;
 217   NaClAppProcessType process_type_;
 218
 219   const base::FilePath profile_directory_;
 220
 221   // Channel proxy to terminate the NaCl-Browser PPAPI channel.
 222   scoped_ptr<IPC::ChannelProxy> ipc_proxy_channel_;
 223   // Browser host for plugin process.
 224   scoped_ptr<content::BrowserPpapiHost> ppapi_host_;
 225
 226   int render_view_id_;
 227
 228   // Throttling time in milliseconds for PpapiHostMsg_Keepalive IPCs.
 229   static unsigned keepalive_throttle_interval_milliseconds_;
 230
 231   // Shared memory provided to the plugin and renderer for
 232   // reporting crash information.
 233   base::SharedMemory crash_info_shmem_;
 234
 235   base::File socket_for_renderer_;
 236   base::File socket_for_sel_ldr_;
 237
 238   base::WeakPtrFactory<NaClProcessHost> weak_factory_;
 239
 240   DISALLOW_COPY_AND_ASSIGN(NaClProcessHost);
 241 };
 242
 243 }  // namespace nacl
 244
 245 #endif  // COMPONENTS_NACL_BROWSER_NACL_PROCESS_HOST_H_