ppapi/native_client/src/trusted/plugin/service_runtime.h

   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright (c) 2012 The Chromium Authors. All rights reserved.
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8 // A class containing information regarding a socket connection to a
   9 // service runtime instance.
  10
  11 #ifndef NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SERVICE_RUNTIME_H_
  12 #define NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SERVICE_RUNTIME_H_
  13
  14 #include <set>
  15
  16 #include "native_client/src/include/nacl_macros.h"
  17 #include "native_client/src/include/nacl_scoped_ptr.h"
  18 #include "native_client/src/include/nacl_string.h"
  19 #include "native_client/src/shared/platform/nacl_sync.h"
  20 #include "native_client/src/shared/srpc/nacl_srpc.h"
  21 #include "native_client/src/trusted/desc/nacl_desc_wrapper.h"
  22 #include "native_client/src/trusted/nonnacl_util/sel_ldr_launcher.h"
  23 #include "native_client/src/trusted/reverse_service/reverse_service.h"
  24 #include "native_client/src/trusted/weak_ref/weak_ref.h"
  25
  26 #include "ppapi/cpp/completion_callback.h"
  27 #include "ppapi/native_client/src/trusted/plugin/utility.h"
  28
  29 struct NaClFileInfo;
  30
  31 namespace nacl {
  32 class DescWrapper;
  33 }  // namespace
  34
  35 namespace plugin {
  36
  37 class ErrorInfo;
  38 class Plugin;
  39 class SelLdrLauncherChrome;
  40 class SrpcClient;
  41 class ServiceRuntime;
  42
  43 // Struct of params used by StartSelLdr.  Use a struct so that callback
  44 // creation templates aren't overwhelmed with too many parameters.
  45 struct SelLdrStartParams {
  46   SelLdrStartParams(const nacl::string& url,
  47                     const PP_NaClFileInfo& file_info,
  48                     bool uses_irt,
  49                     bool uses_ppapi,
  50                     bool enable_dyncode_syscalls,
  51                     bool enable_exception_handling,
  52                     bool enable_crash_throttling)
  53       : url(url),
  54         file_info(file_info),
  55         uses_irt(uses_irt),
  56         uses_ppapi(uses_ppapi),
  57         enable_dyncode_syscalls(enable_dyncode_syscalls),
  58         enable_exception_handling(enable_exception_handling),
  59         enable_crash_throttling(enable_crash_throttling) {
  60   }
  61   nacl::string url;
  62   PP_NaClFileInfo file_info;
  63   bool uses_irt;
  64   bool uses_ppapi;
  65   bool enable_dev_interfaces;
  66   bool enable_dyncode_syscalls;
  67   bool enable_exception_handling;
  68   bool enable_crash_throttling;
  69 };
  70
  71 // Callback resources are essentially our continuation state.
  72 struct OpenManifestEntryResource {
  73  public:
  74   OpenManifestEntryResource(const std::string& target_url,
  75                             struct NaClFileInfo* finfo,
  76                             bool* op_complete)
  77       : url(target_url),
  78         file_info(finfo),
  79         op_complete_ptr(op_complete) {}
  80   ~OpenManifestEntryResource();
  81
  82   std::string url;
  83   struct NaClFileInfo* file_info;
  84   PP_NaClFileInfo pp_file_info;
  85   bool* op_complete_ptr;
  86 };
  87
  88 // Do not invoke from the main thread, since the main methods will
  89 // invoke CallOnMainThread and then wait on a condvar for the task to
  90 // complete: if invoked from the main thread, the main method not
  91 // returning (and thus unblocking the main thread) means that the
  92 // main-thread continuation methods will never get called, and thus
  93 // we'd get a deadlock.
  94 class PluginReverseInterface: public nacl::ReverseInterface {
  95  public:
  96   PluginReverseInterface(nacl::WeakRefAnchor* anchor,
  97                          PP_Instance pp_instance,
  98                          ServiceRuntime* service_runtime,
  99                          pp::CompletionCallback init_done_cb,
 100                          pp::CompletionCallback crash_cb);
 101
 102   virtual ~PluginReverseInterface();
 103
 104   void ShutDown();
 105
 106   virtual void DoPostMessage(nacl::string message);
 107
 108   virtual void StartupInitializationComplete();
 109
 110   virtual bool OpenManifestEntry(nacl::string url_key,
 111                                  struct NaClFileInfo *info);
 112
 113   virtual void ReportCrash();
 114
 115   virtual void ReportExitStatus(int exit_status);
 116
 117   // TODO(teravest): Remove this method once it's gone from
 118   // nacl::ReverseInterface.
 119   virtual int64_t RequestQuotaForWrite(nacl::string file_id,
 120                                        int64_t offset,
 121                                        int64_t bytes_to_write);
 122
 123  protected:
 124   virtual void OpenManifestEntry_MainThreadContinuation(
 125       OpenManifestEntryResource* p,
 126       int32_t err);
 127
 128   virtual void StreamAsFile_MainThreadContinuation(
 129       OpenManifestEntryResource* p,
 130       int32_t result);
 131
 132  private:
 133   nacl::WeakRefAnchor* anchor_;  // holds a ref
 134   // Should be used only in main thread in WeakRef-protected callbacks.
 135   PP_Instance pp_instance_;
 136   ServiceRuntime* service_runtime_;
 137   NaClMutex mu_;
 138   NaClCondVar cv_;
 139   bool shutting_down_;
 140
 141   pp::CompletionCallback init_done_cb_;
 142   pp::CompletionCallback crash_cb_;
 143 };
 144
 145 //  ServiceRuntime abstracts a NativeClient sel_ldr instance.
 146 class ServiceRuntime {
 147  public:
 148   // TODO(sehr): This class should also implement factory methods, using the
 149   // Start method below.
 150   ServiceRuntime(Plugin* plugin,
 151                  PP_Instance pp_instance,
 152                  bool main_service_runtime,
 153                  bool uses_nonsfi_mode,
 154                  pp::CompletionCallback init_done_cb,
 155                  pp::CompletionCallback crash_cb);
 156   // The destructor terminates the sel_ldr process.
 157   ~ServiceRuntime();
 158
 159   // Spawn the sel_ldr instance.
 160   void StartSelLdr(const SelLdrStartParams& params,
 161                    pp::CompletionCallback callback);
 162
 163   // If starting sel_ldr from a background thread, wait for sel_ldr to
 164   // actually start. Returns |false| if timed out waiting for the process
 165   // to start. Otherwise, returns |true| if StartSelLdr is complete
 166   // (either successfully or unsuccessfully).
 167   bool WaitForSelLdrStart();
 168
 169   // Signal to waiting threads that StartSelLdr is complete (either
 170   // successfully or unsuccessfully).
 171   void SignalStartSelLdrDone();
 172
 173   // If starting the nexe from a background thread, wait for the nexe to
 174   // actually start. Returns |true| is the nexe started successfully.
 175   bool WaitForNexeStart();
 176
 177   // Signal to waiting threads that LoadNexeAndStart is complete (either
 178   // successfully or unsuccessfully).
 179   void SignalNexeStarted(bool ok);
 180
 181   // Establish an SrpcClient to the sel_ldr instance and start the nexe.
 182   // This function must be called on the main thread.
 183   // This function must only be called once.
 184   void StartNexe();
 185
 186   // Starts the application channel to the nexe.
 187   SrpcClient* SetupAppChannel();
 188
 189   bool RemoteLog(int severity, const nacl::string& msg);
 190   Plugin* plugin() const { return plugin_; }
 191   void Shutdown();
 192
 193   bool main_service_runtime() const { return main_service_runtime_; }
 194
 195  private:
 196   NACL_DISALLOW_COPY_AND_ASSIGN(ServiceRuntime);
 197   bool StartNexeInternal();
 198
 199   bool SetupCommandChannel();
 200   bool InitReverseService();
 201   bool StartModule();
 202   void ReapLogs();
 203
 204   void ReportLoadError(const ErrorInfo& error_info);
 205
 206   NaClSrpcChannel command_channel_;
 207   Plugin* plugin_;
 208   PP_Instance pp_instance_;
 209   bool main_service_runtime_;
 210   bool uses_nonsfi_mode_;
 211   nacl::ReverseService* reverse_service_;
 212   nacl::scoped_ptr<SelLdrLauncherChrome> subprocess_;
 213
 214   nacl::WeakRefAnchor* anchor_;
 215
 216   PluginReverseInterface* rev_interface_;
 217
 218   // Mutex and CondVar to protect start_sel_ldr_done_ and nexe_started_.
 219   NaClMutex mu_;
 220   NaClCondVar cond_;
 221   bool start_sel_ldr_done_;
 222   bool start_nexe_done_;
 223   bool nexe_started_ok_;
 224
 225   NaClHandle bootstrap_channel_;
 226 };
 227
 228 }  // namespace plugin
 229
 230 #endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_SERVICE_RUNTIME_H_