components/nacl/renderer/ppb_nacl_private_impl.cc

   1 // Copyright 2013 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 #include "components/nacl/renderer/ppb_nacl_private_impl.h"
   6
   7 #include <numeric>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/bind.h"
  12 #include "base/bind_helpers.h"
  13 #include "base/command_line.h"
  14 #include "base/cpu.h"
  15 #include "base/files/file.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/logging.h"
  18 #include "base/rand_util.h"
  19 #include "base/strings/string_split.h"
  20 #include "base/strings/string_util.h"
  21 #include "components/nacl/common/nacl_host_messages.h"
  22 #include "components/nacl/common/nacl_messages.h"
  23 #include "components/nacl/common/nacl_nonsfi_util.h"
  24 #include "components/nacl/common/nacl_switches.h"
  25 #include "components/nacl/common/nacl_types.h"
  26 #include "components/nacl/renderer/file_downloader.h"
  27 #include "components/nacl/renderer/histogram.h"
  28 #include "components/nacl/renderer/json_manifest.h"
  29 #include "components/nacl/renderer/manifest_downloader.h"
  30 #include "components/nacl/renderer/manifest_service_channel.h"
  31 #include "components/nacl/renderer/nexe_load_manager.h"
  32 #include "components/nacl/renderer/platform_info.h"
  33 #include "components/nacl/renderer/pnacl_translation_resource_host.h"
  34 #include "components/nacl/renderer/progress_event.h"
  35 #include "components/nacl/renderer/trusted_plugin_channel.h"
  36 #include "content/public/common/content_client.h"
  37 #include "content/public/common/content_switches.h"
  38 #include "content/public/common/sandbox_init.h"
  39 #include "content/public/renderer/pepper_plugin_instance.h"
  40 #include "content/public/renderer/render_thread.h"
  41 #include "content/public/renderer/render_view.h"
  42 #include "content/public/renderer/renderer_ppapi_host.h"
  43 #include "native_client/src/public/imc_types.h"
  44 #include "net/base/data_url.h"
  45 #include "net/base/net_errors.h"
  46 #include "net/http/http_util.h"
  47 #include "ppapi/c/pp_bool.h"
  48 #include "ppapi/c/private/pp_file_handle.h"
  49 #include "ppapi/shared_impl/ppapi_globals.h"
  50 #include "ppapi/shared_impl/ppapi_permissions.h"
  51 #include "ppapi/shared_impl/ppapi_preferences.h"
  52 #include "ppapi/shared_impl/var.h"
  53 #include "ppapi/shared_impl/var_tracker.h"
  54 #include "ppapi/thunk/enter.h"
  55 #include "third_party/WebKit/public/platform/WebURLLoader.h"
  56 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  57 #include "third_party/WebKit/public/web/WebDocument.h"
  58 #include "third_party/WebKit/public/web/WebElement.h"
  59 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  60 #include "third_party/WebKit/public/web/WebPluginContainer.h"
  61 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
  62 #include "third_party/WebKit/public/web/WebURLLoaderOptions.h"
  63 #include "third_party/jsoncpp/source/include/json/reader.h"
  64 #include "third_party/jsoncpp/source/include/json/value.h"
  65
  66 namespace nacl {
  67 namespace {
  68
  69 // The pseudo-architecture used to indicate portable native client.
  70 const char* const kPortableArch = "portable";
  71
  72 // The base URL for resources used by the PNaCl translator processes.
  73 const char* kPNaClTranslatorBaseUrl = "chrome://pnacl-translator/";
  74
  75 base::LazyInstance<scoped_refptr<PnaclTranslationResourceHost> >
  76     g_pnacl_resource_host = LAZY_INSTANCE_INITIALIZER;
  77
  78 bool InitializePnaclResourceHost() {
  79   // Must run on the main thread.
  80   content::RenderThread* render_thread = content::RenderThread::Get();
  81   if (!render_thread)
  82     return false;
  83   if (!g_pnacl_resource_host.Get().get()) {
  84     g_pnacl_resource_host.Get() = new PnaclTranslationResourceHost(
  85         render_thread->GetIOMessageLoopProxy());
  86     render_thread->AddFilter(g_pnacl_resource_host.Get().get());
  87   }
  88   return true;
  89 }
  90
  91 struct InstanceInfo {
  92   InstanceInfo() : plugin_pid(base::kNullProcessId), plugin_child_id(0) {}
  93   GURL url;
  94   ppapi::PpapiPermissions permissions;
  95   base::ProcessId plugin_pid;
  96   int plugin_child_id;
  97   IPC::ChannelHandle channel_handle;
  98 };
  99
 100 typedef std::map<PP_Instance, InstanceInfo> InstanceInfoMap;
 101
 102 base::LazyInstance<InstanceInfoMap> g_instance_info =
 103     LAZY_INSTANCE_INITIALIZER;
 104
 105 static const PP_NaClFileInfo kInvalidNaClFileInfo = {
 106     PP_kInvalidFileHandle,
 107     0,  // token_lo
 108     0,  // token_hi
 109 };
 110
 111 int GetRoutingID(PP_Instance instance) {
 112   // Check that we are on the main renderer thread.
 113   DCHECK(content::RenderThread::Get());
 114   content::RendererPpapiHost *host =
 115       content::RendererPpapiHost::GetForPPInstance(instance);
 116   if (!host)
 117     return 0;
 118   return host->GetRoutingIDForWidget(instance);
 119 }
 120
 121 // Returns whether the channel_handle is valid or not.
 122 bool IsValidChannelHandle(const IPC::ChannelHandle& channel_handle) {
 123   if (channel_handle.name.empty()) {
 124     return false;
 125   }
 126
 127 #if defined(OS_POSIX)
 128   if (channel_handle.socket.fd == -1) {
 129     return false;
 130   }
 131 #endif
 132
 133   return true;
 134 }
 135
 136 void PostPPCompletionCallback(PP_CompletionCallback callback,
 137                               int32_t status) {
 138   ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 139       FROM_HERE,
 140       base::Bind(callback.func, callback.user_data, status));
 141 }
 142
 143 bool ManifestResolveKey(PP_Instance instance,
 144                         bool is_helper_process,
 145                         const std::string& key,
 146                         std::string* full_url,
 147                         PP_PNaClOptions* pnacl_options);
 148
 149 typedef base::Callback<void(int32_t, const PP_NaClFileInfo&)>
 150 DownloadFileCallback;
 151
 152 void DownloadFile(PP_Instance instance,
 153                   const std::string& url,
 154                   const DownloadFileCallback& callback);
 155
 156 PP_Bool StartPpapiProxy(PP_Instance instance);
 157
 158 // Thin adapter from PPP_ManifestService to ManifestServiceChannel::Delegate.
 159 // Note that user_data is managed by the caller of LaunchSelLdr. Please see
 160 // also PP_ManifestService's comment for more details about resource
 161 // management.
 162 class ManifestServiceProxy : public ManifestServiceChannel::Delegate {
 163  public:
 164   ManifestServiceProxy(PP_Instance pp_instance)
 165       : pp_instance_(pp_instance) {
 166   }
 167
 168   virtual ~ManifestServiceProxy() { }
 169
 170   virtual void StartupInitializationComplete() OVERRIDE {
 171     if (StartPpapiProxy(pp_instance_) == PP_TRUE) {
 172       JsonManifest* manifest = GetJsonManifest(pp_instance_);
 173       NexeLoadManager* load_manager = NexeLoadManager::Get(pp_instance_);
 174       if (load_manager && manifest) {
 175         std::string full_url;
 176         PP_PNaClOptions pnacl_options;
 177         bool uses_nonsfi_mode;
 178         JsonManifest::ErrorInfo error_info;
 179         if (manifest->GetProgramURL(&full_url,
 180                                     &pnacl_options,
 181                                     &uses_nonsfi_mode,
 182                                     &error_info)) {
 183           int64_t nexe_size = load_manager->nexe_size();
 184           load_manager->ReportLoadSuccess(full_url, nexe_size, nexe_size);
 185         }
 186       }
 187     }
 188   }
 189
 190   virtual void OpenResource(
 191       const std::string& key,
 192       const ManifestServiceChannel::OpenResourceCallback& callback) OVERRIDE {
 193     DCHECK(ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->
 194                BelongsToCurrentThread());
 195
 196     std::string url;
 197     // TODO(teravest): Clean up pnacl_options logic in JsonManifest so we don't
 198     // have to initialize it like this here.
 199     PP_PNaClOptions pnacl_options;
 200     pnacl_options.translate = PP_FALSE;
 201     pnacl_options.is_debug = PP_FALSE;
 202     pnacl_options.opt_level = 2;
 203     if (!ManifestResolveKey(pp_instance_, false, key, &url, &pnacl_options)) {
 204       base::MessageLoop::current()->PostTask(
 205           FROM_HERE,
 206           base::Bind(callback, base::Passed(base::File()), 0, 0));
 207       return;
 208     }
 209
 210     // We have to call DidDownloadFile, even if this object is destroyed, so
 211     // that the handle inside PP_NaClFileInfo isn't leaked. This means that the
 212     // callback passed to this function shouldn't have a weak pointer to an
 213     // object either.
 214     //
 215     // TODO(teravest): Make a type like PP_NaClFileInfo to use for DownloadFile
 216     // that would close the file handle on destruction.
 217     DownloadFile(pp_instance_, url,
 218                  base::Bind(&ManifestServiceProxy::DidDownloadFile, callback));
 219   }
 220
 221  private:
 222   static void DidDownloadFile(
 223       ManifestServiceChannel::OpenResourceCallback callback,
 224       int32_t pp_error,
 225       const PP_NaClFileInfo& file_info) {
 226     if (pp_error != PP_OK) {
 227       callback.Run(base::File(), 0, 0);
 228       return;
 229     }
 230     callback.Run(base::File(file_info.handle),
 231                  file_info.token_lo,
 232                  file_info.token_hi);
 233   }
 234
 235   PP_Instance pp_instance_;
 236   DISALLOW_COPY_AND_ASSIGN(ManifestServiceProxy);
 237 };
 238
 239 blink::WebURLLoader* CreateWebURLLoader(const blink::WebDocument& document,
 240                                         const GURL& gurl) {
 241   blink::WebURLLoaderOptions options;
 242   options.untrustedHTTP = true;
 243
 244   // Options settings here follow the original behavior in the trusted
 245   // plugin and PepperURLLoaderHost.
 246   if (document.securityOrigin().canRequest(gurl)) {
 247     options.allowCredentials = true;
 248   } else {
 249     // Allow CORS.
 250     options.crossOriginRequestPolicy =
 251         blink::WebURLLoaderOptions::CrossOriginRequestPolicyUseAccessControl;
 252   }
 253   return document.frame()->createAssociatedURLLoader(options);
 254 }
 255
 256 blink::WebURLRequest CreateWebURLRequest(const blink::WebDocument& document,
 257                                          const GURL& gurl) {
 258   blink::WebURLRequest request;
 259   request.initialize();
 260   request.setURL(gurl);
 261   request.setFirstPartyForCookies(document.firstPartyForCookies());
 262   return request;
 263 }
 264
 265 int32_t FileDownloaderToPepperError(FileDownloader::Status status) {
 266   switch (status) {
 267     case FileDownloader::SUCCESS:
 268       return PP_OK;
 269     case FileDownloader::ACCESS_DENIED:
 270       return PP_ERROR_NOACCESS;
 271     case FileDownloader::FAILED:
 272       return PP_ERROR_FAILED;
 273     // No default case, to catch unhandled Status values.
 274   }
 275   return PP_ERROR_FAILED;
 276 }
 277
 278 // Launch NaCl's sel_ldr process.
 279 void LaunchSelLdr(PP_Instance instance,
 280                   PP_Bool main_service_runtime,
 281                   const char* alleged_url,
 282                   const PP_NaClFileInfo* nexe_file_info,
 283                   PP_Bool uses_irt,
 284                   PP_Bool uses_ppapi,
 285                   PP_Bool uses_nonsfi_mode,
 286                   PP_Bool enable_ppapi_dev,
 287                   PP_Bool enable_dyncode_syscalls,
 288                   PP_Bool enable_exception_handling,
 289                   PP_Bool enable_crash_throttling,
 290                   void* imc_handle,
 291                   PP_CompletionCallback callback) {
 292   CHECK(ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->
 293             BelongsToCurrentThread());
 294
 295   // Create the manifest service proxy here, so on error case, it will be
 296   // destructed (without passing it to ManifestServiceChannel).
 297   scoped_ptr<ManifestServiceChannel::Delegate> manifest_service_proxy(
 298       new ManifestServiceProxy(instance));
 299
 300   FileDescriptor result_socket;
 301   IPC::Sender* sender = content::RenderThread::Get();
 302   DCHECK(sender);
 303   int routing_id = 0;
 304   // If the nexe uses ppapi APIs, we need a routing ID.
 305   // To get the routing ID, we must be on the main thread.
 306   // Some nexes do not use ppapi and launch from the background thread,
 307   // so those nexes can skip finding a routing_id.
 308   if (uses_ppapi) {
 309     routing_id = GetRoutingID(instance);
 310     if (!routing_id) {
 311       if (nexe_file_info->handle != PP_kInvalidFileHandle) {
 312         base::File closer(nexe_file_info->handle);
 313       }
 314       ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 315           FROM_HERE,
 316           base::Bind(callback.func, callback.user_data,
 317                      static_cast<int32_t>(PP_ERROR_FAILED)));
 318       return;
 319     }
 320   }
 321
 322   InstanceInfo instance_info;
 323   instance_info.url = GURL(alleged_url);
 324
 325   uint32_t perm_bits = ppapi::PERMISSION_NONE;
 326   // Conditionally block 'Dev' interfaces. We do this for the NaCl process, so
 327   // it's clearer to developers when they are using 'Dev' inappropriately. We
 328   // must also check on the trusted side of the proxy.
 329   if (enable_ppapi_dev)
 330     perm_bits |= ppapi::PERMISSION_DEV;
 331   instance_info.permissions =
 332       ppapi::PpapiPermissions::GetForCommandLine(perm_bits);
 333   std::string error_message_string;
 334   NaClLaunchResult launch_result;
 335
 336   IPC::PlatformFileForTransit nexe_for_transit =
 337       IPC::InvalidPlatformFileForTransit();
 338 #if defined(OS_POSIX)
 339   if (nexe_file_info->handle != PP_kInvalidFileHandle)
 340     nexe_for_transit = base::FileDescriptor(nexe_file_info->handle, true);
 341 #elif defined(OS_WIN)
 342   // Duplicate the handle on the browser side instead of the renderer.
 343   // This is because BrokerGetFileForProcess isn't part of content/public, and
 344   // it's simpler to do the duplication in the browser anyway.
 345   nexe_for_transit = nexe_file_info->handle;
 346 #else
 347 #error Unsupported target platform.
 348 #endif
 349   if (!sender->Send(new NaClHostMsg_LaunchNaCl(
 350           NaClLaunchParams(
 351               instance_info.url.spec(),
 352               nexe_for_transit,
 353               nexe_file_info->token_lo,
 354               nexe_file_info->token_hi,
 355               routing_id,
 356               perm_bits,
 357               PP_ToBool(uses_irt),
 358               PP_ToBool(uses_nonsfi_mode),
 359               PP_ToBool(enable_dyncode_syscalls),
 360               PP_ToBool(enable_exception_handling),
 361               PP_ToBool(enable_crash_throttling)),
 362           &launch_result,
 363           &error_message_string))) {
 364     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 365         FROM_HERE,
 366         base::Bind(callback.func, callback.user_data,
 367                    static_cast<int32_t>(PP_ERROR_FAILED)));
 368     return;
 369   }
 370
 371   if (!error_message_string.empty()) {
 372     if (PP_ToBool(main_service_runtime)) {
 373       NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 374       if (load_manager) {
 375         load_manager->ReportLoadError(PP_NACL_ERROR_SEL_LDR_LAUNCH,
 376                                       "ServiceRuntime: failed to start",
 377                                       error_message_string);
 378       }
 379     }
 380     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 381         FROM_HERE,
 382         base::Bind(callback.func, callback.user_data,
 383                    static_cast<int32_t>(PP_ERROR_FAILED)));
 384     return;
 385   }
 386   result_socket = launch_result.imc_channel_handle;
 387   instance_info.channel_handle = launch_result.ppapi_ipc_channel_handle;
 388   instance_info.plugin_pid = launch_result.plugin_pid;
 389   instance_info.plugin_child_id = launch_result.plugin_child_id;
 390
 391   // Don't save instance_info if channel handle is invalid.
 392   if (IsValidChannelHandle(instance_info.channel_handle))
 393     g_instance_info.Get()[instance] = instance_info;
 394
 395   *(static_cast<NaClHandle*>(imc_handle)) = ToNativeHandle(result_socket);
 396
 397   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 398   DCHECK(load_manager);
 399   if (!load_manager) {
 400     PostPPCompletionCallback(callback, PP_ERROR_FAILED);
 401     base::SharedMemory::CloseHandle(launch_result.crash_info_shmem_handle);
 402     return;
 403   }
 404
 405   // Store the crash information shared memory handle.
 406   load_manager->set_crash_info_shmem_handle(
 407       launch_result.crash_info_shmem_handle);
 408
 409   // Create the trusted plugin channel.
 410   if (IsValidChannelHandle(launch_result.trusted_ipc_channel_handle)) {
 411     bool report_exit_status = PP_ToBool(main_service_runtime);
 412     scoped_ptr<TrustedPluginChannel> trusted_plugin_channel(
 413         new TrustedPluginChannel(
 414             load_manager,
 415             launch_result.trusted_ipc_channel_handle,
 416             content::RenderThread::Get()->GetShutdownEvent(),
 417             report_exit_status));
 418     load_manager->set_trusted_plugin_channel(trusted_plugin_channel.Pass());
 419   } else {
 420     PostPPCompletionCallback(callback, PP_ERROR_FAILED);
 421     return;
 422   }
 423
 424   // Create the manifest service handle as well.
 425   // For security hardening, disable the IPCs for open_resource() when they
 426   // aren't needed.  PNaCl doesn't expose open_resource().  Note that
 427   // enable_dyncode_syscalls is true if and only if the plugin is a non-PNaCl
 428   // plugin.
 429   if (load_manager &&
 430       enable_dyncode_syscalls &&
 431       IsValidChannelHandle(
 432           launch_result.manifest_service_ipc_channel_handle)) {
 433     scoped_ptr<ManifestServiceChannel> manifest_service_channel(
 434         new ManifestServiceChannel(
 435             launch_result.manifest_service_ipc_channel_handle,
 436             base::Bind(&PostPPCompletionCallback, callback),
 437             manifest_service_proxy.Pass(),
 438             content::RenderThread::Get()->GetShutdownEvent()));
 439     load_manager->set_manifest_service_channel(
 440         manifest_service_channel.Pass());
 441   } else {
 442     // Currently, manifest service works only on linux/non-SFI mode.
 443     // On other platforms, the socket will not be created, and thus this
 444     // condition needs to be handled as success.
 445     PostPPCompletionCallback(callback, PP_OK);
 446   }
 447 }
 448
 449 PP_Bool StartPpapiProxy(PP_Instance instance) {
 450   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 451   DCHECK(load_manager);
 452   if (!load_manager)
 453     return PP_FALSE;
 454
 455   content::PepperPluginInstance* plugin_instance =
 456       content::PepperPluginInstance::Get(instance);
 457   if (!plugin_instance) {
 458     DLOG(ERROR) << "GetInstance() failed";
 459     return PP_FALSE;
 460   }
 461
 462   InstanceInfoMap& map = g_instance_info.Get();
 463   InstanceInfoMap::iterator it = map.find(instance);
 464   if (it == map.end()) {
 465     DLOG(ERROR) << "Could not find instance ID";
 466     return PP_FALSE;
 467   }
 468   InstanceInfo instance_info = it->second;
 469   map.erase(it);
 470
 471   PP_ExternalPluginResult result = plugin_instance->SwitchToOutOfProcessProxy(
 472       base::FilePath().AppendASCII(instance_info.url.spec()),
 473       instance_info.permissions,
 474       instance_info.channel_handle,
 475       instance_info.plugin_pid,
 476       instance_info.plugin_child_id);
 477
 478   if (result == PP_EXTERNAL_PLUGIN_OK) {
 479     // Log the amound of time that has passed between the trusted plugin being
 480     // initialized and the untrusted plugin being initialized.  This is
 481     // (roughly) the cost of using NaCl, in terms of startup time.
 482     load_manager->ReportStartupOverhead();
 483     return PP_TRUE;
 484   } else if (result == PP_EXTERNAL_PLUGIN_ERROR_MODULE) {
 485     load_manager->ReportLoadError(PP_NACL_ERROR_START_PROXY_MODULE,
 486                                   "could not initialize module.");
 487   } else if (result == PP_EXTERNAL_PLUGIN_ERROR_INSTANCE) {
 488     load_manager->ReportLoadError(PP_NACL_ERROR_START_PROXY_MODULE,
 489                                   "could not create instance.");
 490   }
 491   return PP_FALSE;
 492 }
 493
 494 int UrandomFD(void) {
 495 #if defined(OS_POSIX)
 496   return base::GetUrandomFD();
 497 #else
 498   return -1;
 499 #endif
 500 }
 501
 502 PP_Bool Are3DInterfacesDisabled() {
 503   return PP_FromBool(CommandLine::ForCurrentProcess()->HasSwitch(
 504                          switches::kDisable3DAPIs));
 505 }
 506
 507 int32_t BrokerDuplicateHandle(PP_FileHandle source_handle,
 508                               uint32_t process_id,
 509                               PP_FileHandle* target_handle,
 510                               uint32_t desired_access,
 511                               uint32_t options) {
 512 #if defined(OS_WIN)
 513   return content::BrokerDuplicateHandle(source_handle, process_id,
 514                                         target_handle, desired_access,
 515                                         options);
 516 #else
 517   return 0;
 518 #endif
 519 }
 520
 521 // Convert a URL to a filename for GetReadonlyPnaclFd.
 522 // Must be kept in sync with PnaclCanOpenFile() in
 523 // components/nacl/browser/nacl_file_host.cc.
 524 std::string PnaclComponentURLToFilename(const std::string& url) {
 525   // PNaCl component URLs aren't arbitrary URLs; they are always either
 526   // generated from ManifestResolveKey or PnaclResources::ReadResourceInfo.
 527   // So, it's safe to just use string parsing operations here instead of
 528   // URL-parsing ones.
 529   DCHECK(StartsWithASCII(url, kPNaClTranslatorBaseUrl, true));
 530   std::string r = url.substr(std::string(kPNaClTranslatorBaseUrl).length());
 531
 532   // Use white-listed-chars.
 533   size_t replace_pos;
 534   static const char* white_list = "abcdefghijklmnopqrstuvwxyz0123456789_";
 535   replace_pos = r.find_first_not_of(white_list);
 536   while(replace_pos != std::string::npos) {
 537     r = r.replace(replace_pos, 1, "_");
 538     replace_pos = r.find_first_not_of(white_list);
 539   }
 540   return r;
 541 }
 542
 543 PP_FileHandle GetReadonlyPnaclFd(const char* url,
 544                                  bool is_executable,
 545                                  uint64_t* nonce_lo,
 546                                  uint64_t* nonce_hi) {
 547   std::string filename = PnaclComponentURLToFilename(url);
 548   IPC::PlatformFileForTransit out_fd = IPC::InvalidPlatformFileForTransit();
 549   IPC::Sender* sender = content::RenderThread::Get();
 550   DCHECK(sender);
 551   if (!sender->Send(new NaClHostMsg_GetReadonlyPnaclFD(
 552           std::string(filename), is_executable,
 553           &out_fd, nonce_lo, nonce_hi))) {
 554     return PP_kInvalidFileHandle;
 555   }
 556   if (out_fd == IPC::InvalidPlatformFileForTransit()) {
 557     return PP_kInvalidFileHandle;
 558   }
 559   return IPC::PlatformFileForTransitToPlatformFile(out_fd);
 560 }
 561
 562 void GetReadExecPnaclFd(const char* url,
 563                         PP_NaClFileInfo* out_file_info) {
 564   *out_file_info = kInvalidNaClFileInfo;
 565   out_file_info->handle = GetReadonlyPnaclFd(url, true /* is_executable */,
 566                                              &out_file_info->token_lo,
 567                                              &out_file_info->token_hi);
 568 }
 569
 570 PP_FileHandle CreateTemporaryFile(PP_Instance instance) {
 571   IPC::PlatformFileForTransit transit_fd = IPC::InvalidPlatformFileForTransit();
 572   IPC::Sender* sender = content::RenderThread::Get();
 573   DCHECK(sender);
 574   if (!sender->Send(new NaClHostMsg_NaClCreateTemporaryFile(
 575           &transit_fd))) {
 576     return PP_kInvalidFileHandle;
 577   }
 578
 579   if (transit_fd == IPC::InvalidPlatformFileForTransit()) {
 580     return PP_kInvalidFileHandle;
 581   }
 582
 583   return IPC::PlatformFileForTransitToPlatformFile(transit_fd);
 584 }
 585
 586 int32_t GetNumberOfProcessors() {
 587   IPC::Sender* sender = content::RenderThread::Get();
 588   DCHECK(sender);
 589   int32_t num_processors = 1;
 590   return sender->Send(new NaClHostMsg_NaClGetNumProcessors(&num_processors)) ?
 591       num_processors : 1;
 592 }
 593
 594 PP_Bool PPIsNonSFIModeEnabled() {
 595   return PP_FromBool(IsNonSFIModeEnabled());
 596 }
 597
 598 void GetNexeFd(PP_Instance instance,
 599                const std::string& pexe_url,
 600                uint32_t opt_level,
 601                const base::Time& last_modified_time,
 602                const std::string& etag,
 603                bool has_no_store_header,
 604                base::Callback<void(int32_t, bool, PP_FileHandle)> callback) {
 605   if (!InitializePnaclResourceHost()) {
 606     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 607     FROM_HERE,
 608     base::Bind(callback,
 609                static_cast<int32_t>(PP_ERROR_FAILED),
 610                false,
 611                PP_kInvalidFileHandle));
 612     return;
 613   }
 614
 615   PnaclCacheInfo cache_info;
 616   cache_info.pexe_url = GURL(pexe_url);
 617   // TODO(dschuff): Get this value from the pnacl json file after it
 618   // rolls in from NaCl.
 619   cache_info.abi_version = 1;
 620   cache_info.opt_level = opt_level;
 621   cache_info.last_modified = last_modified_time;
 622   cache_info.etag = etag;
 623   cache_info.has_no_store_header = has_no_store_header;
 624   cache_info.sandbox_isa = GetSandboxArch();
 625   cache_info.extra_flags = GetCpuFeatures();
 626
 627   g_pnacl_resource_host.Get()->RequestNexeFd(
 628       GetRoutingID(instance),
 629       instance,
 630       cache_info,
 631       callback);
 632 }
 633
 634 void ReportTranslationFinished(PP_Instance instance,
 635                                PP_Bool success,
 636                                int32_t opt_level,
 637                                int64_t pexe_size,
 638                                int64_t compile_time_us) {
 639   if (success == PP_TRUE) {
 640     static const int32_t kUnknownOptLevel = 4;
 641     if (opt_level < 0 || opt_level > 3)
 642       opt_level = kUnknownOptLevel;
 643     HistogramEnumerate("NaCl.Options.PNaCl.OptLevel",
 644                        opt_level,
 645                        kUnknownOptLevel + 1);
 646     HistogramKBPerSec("NaCl.Perf.PNaClLoadTime.CompileKBPerSec",
 647                       pexe_size / 1024,
 648                       compile_time_us);
 649     HistogramSizeKB("NaCl.Perf.Size.Pexe", pexe_size / 1024);
 650
 651     NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 652     if (load_manager) {
 653       base::TimeDelta total_time = base::Time::Now() -
 654                                    load_manager->pnacl_start_time();
 655       HistogramTimeTranslation("NaCl.Perf.PNaClLoadTime.TotalUncachedTime",
 656                                total_time.InMilliseconds());
 657       HistogramKBPerSec("NaCl.Perf.PNaClLoadTime.TotalUncachedKBPerSec",
 658                         pexe_size / 1024,
 659                         total_time.InMicroseconds());
 660     }
 661   }
 662
 663   // If the resource host isn't initialized, don't try to do that here.
 664   // Just return because something is already very wrong.
 665   if (g_pnacl_resource_host.Get().get() == NULL)
 666     return;
 667   g_pnacl_resource_host.Get()->ReportTranslationFinished(instance, success);
 668 }
 669
 670 PP_FileHandle OpenNaClExecutable(PP_Instance instance,
 671                                  const char* file_url,
 672                                  uint64_t* nonce_lo,
 673                                  uint64_t* nonce_hi) {
 674   // Fast path only works for installed file URLs.
 675   GURL gurl(file_url);
 676   if (!gurl.SchemeIs("chrome-extension"))
 677     return PP_kInvalidFileHandle;
 678
 679   content::PepperPluginInstance* plugin_instance =
 680       content::PepperPluginInstance::Get(instance);
 681   if (!plugin_instance)
 682     return PP_kInvalidFileHandle;
 683   // IMPORTANT: Make sure the document can request the given URL. If we don't
 684   // check, a malicious app could probe the extension system. This enforces a
 685   // same-origin policy which prevents the app from requesting resources from
 686   // another app.
 687   blink::WebSecurityOrigin security_origin =
 688       plugin_instance->GetContainer()->element().document().securityOrigin();
 689   if (!security_origin.canRequest(gurl))
 690     return PP_kInvalidFileHandle;
 691
 692   IPC::PlatformFileForTransit out_fd = IPC::InvalidPlatformFileForTransit();
 693   IPC::Sender* sender = content::RenderThread::Get();
 694   DCHECK(sender);
 695   *nonce_lo = 0;
 696   *nonce_hi = 0;
 697   base::FilePath file_path;
 698   if (!sender->Send(
 699       new NaClHostMsg_OpenNaClExecutable(GetRoutingID(instance),
 700                                          GURL(file_url),
 701                                          &out_fd,
 702                                          nonce_lo,
 703                                          nonce_hi))) {
 704     return PP_kInvalidFileHandle;
 705   }
 706
 707   if (out_fd == IPC::InvalidPlatformFileForTransit())
 708     return PP_kInvalidFileHandle;
 709
 710   return IPC::PlatformFileForTransitToPlatformFile(out_fd);
 711 }
 712
 713 void DispatchEvent(PP_Instance instance,
 714                    PP_NaClEventType event_type,
 715                    const char *resource_url,
 716                    PP_Bool length_is_computable,
 717                    uint64_t loaded_bytes,
 718                    uint64_t total_bytes) {
 719   ProgressEvent event(event_type,
 720                       resource_url,
 721                       PP_ToBool(length_is_computable),
 722                       loaded_bytes,
 723                       total_bytes);
 724   DispatchProgressEvent(instance, event);
 725 }
 726
 727 void ReportLoadSuccess(PP_Instance instance,
 728                        uint64_t loaded_bytes,
 729                        uint64_t total_bytes) {
 730   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 731   if (load_manager) {
 732     load_manager->ReportLoadSuccess(load_manager->program_url(),
 733                                     loaded_bytes,
 734                                     total_bytes);
 735   }
 736 }
 737
 738 void ReportLoadError(PP_Instance instance,
 739                      PP_NaClError error,
 740                      const char* error_message) {
 741   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 742   if (load_manager)
 743     load_manager->ReportLoadError(error, error_message);
 744 }
 745
 746 void ReportLoadAbort(PP_Instance instance) {
 747   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 748   if (load_manager)
 749     load_manager->ReportLoadAbort();
 750 }
 751
 752 void InstanceCreated(PP_Instance instance) {
 753   NexeLoadManager::Create(instance);
 754 }
 755
 756 void InstanceDestroyed(PP_Instance instance) {
 757   DeleteJsonManifest(instance);
 758   NexeLoadManager::Delete(instance);
 759 }
 760
 761 PP_Bool NaClDebugEnabledForURL(const char* alleged_nmf_url) {
 762   if (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableNaClDebug))
 763     return PP_FALSE;
 764   IPC::Sender* sender = content::RenderThread::Get();
 765   DCHECK(sender);
 766   bool should_debug = false;
 767   return PP_FromBool(
 768       sender->Send(new NaClHostMsg_NaClDebugEnabledForURL(GURL(alleged_nmf_url),
 769                                                           &should_debug)) &&
 770       should_debug);
 771 }
 772
 773 void LogToConsole(PP_Instance instance, const char* message) {
 774   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 775   DCHECK(load_manager);
 776   if (load_manager)
 777     load_manager->LogToConsole(std::string(message));
 778 }
 779
 780 PP_NaClReadyState GetNaClReadyState(PP_Instance instance) {
 781   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 782   DCHECK(load_manager);
 783   if (load_manager)
 784     return load_manager->nacl_ready_state();
 785   return PP_NACL_READY_STATE_UNSENT;
 786 }
 787
 788 void Vlog(const char* message) {
 789   VLOG(1) << message;
 790 }
 791
 792 void InitializePlugin(PP_Instance instance,
 793                       uint32_t argc,
 794                       const char* argn[],
 795                       const char* argv[]) {
 796   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 797   DCHECK(load_manager);
 798   if (load_manager)
 799     load_manager->InitializePlugin(argc, argn, argv);
 800 }
 801
 802 int64_t GetNexeSize(PP_Instance instance) {
 803   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 804   DCHECK(load_manager);
 805   if (load_manager)
 806     return load_manager->nexe_size();
 807   return 0;
 808 }
 809
 810 void DownloadManifestToBuffer(PP_Instance instance,
 811                               struct PP_CompletionCallback callback);
 812
 813 bool CreateJsonManifest(PP_Instance instance,
 814                         const std::string& manifest_url,
 815                         const std::string& manifest_data);
 816
 817 void RequestNaClManifest(PP_Instance instance,
 818                          PP_CompletionCallback callback) {
 819   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 820   DCHECK(load_manager);
 821   if (!load_manager) {
 822     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 823         FROM_HERE,
 824         base::Bind(callback.func, callback.user_data,
 825                    static_cast<int32_t>(PP_ERROR_FAILED)));
 826     return;
 827   }
 828
 829   std::string url = load_manager->GetManifestURLArgument();
 830   if (url.empty() || !load_manager->RequestNaClManifest(url)) {
 831     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 832         FROM_HERE,
 833         base::Bind(callback.func, callback.user_data,
 834                    static_cast<int32_t>(PP_ERROR_FAILED)));
 835     return;
 836   }
 837
 838   const GURL& base_url = load_manager->manifest_base_url();
 839   if (base_url.SchemeIs("data")) {
 840     GURL gurl(base_url);
 841     std::string mime_type;
 842     std::string charset;
 843     std::string data;
 844     int32_t error = PP_ERROR_FAILED;
 845     if (net::DataURL::Parse(gurl, &mime_type, &charset, &data)) {
 846       if (data.size() <= ManifestDownloader::kNaClManifestMaxFileBytes) {
 847         if (CreateJsonManifest(instance, base_url.spec(), data))
 848           error = PP_OK;
 849       } else {
 850         load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_TOO_LARGE,
 851                                       "manifest file too large.");
 852       }
 853     } else {
 854       load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_LOAD_URL,
 855                                     "could not load manifest url.");
 856     }
 857     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 858         FROM_HERE,
 859         base::Bind(callback.func, callback.user_data, error));
 860   } else {
 861     DownloadManifestToBuffer(instance, callback);
 862   }
 863 }
 864
 865 PP_Var GetManifestBaseURL(PP_Instance instance) {
 866   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 867   DCHECK(load_manager);
 868   if (!load_manager)
 869     return PP_MakeUndefined();
 870   const GURL& gurl = load_manager->manifest_base_url();
 871   if (!gurl.is_valid())
 872     return PP_MakeUndefined();
 873   return ppapi::StringVar::StringToPPVar(gurl.spec());
 874 }
 875
 876 void ProcessNaClManifest(PP_Instance instance, const char* program_url) {
 877   nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 878   if (load_manager)
 879     load_manager->ProcessNaClManifest(program_url);
 880 }
 881
 882 PP_Bool DevInterfacesEnabled(PP_Instance instance) {
 883   nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 884   if (load_manager)
 885     return PP_FromBool(load_manager->DevInterfacesEnabled());
 886   return PP_FALSE;
 887 }
 888
 889 void DownloadManifestToBufferCompletion(PP_Instance instance,
 890                                         struct PP_CompletionCallback callback,
 891                                         base::Time start_time,
 892                                         PP_NaClError pp_nacl_error,
 893                                         const std::string& data);
 894
 895 void DownloadManifestToBuffer(PP_Instance instance,
 896                               struct PP_CompletionCallback callback) {
 897   nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 898   DCHECK(load_manager);
 899   content::PepperPluginInstance* plugin_instance =
 900       content::PepperPluginInstance::Get(instance);
 901   if (!load_manager || !plugin_instance) {
 902     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
 903         FROM_HERE,
 904         base::Bind(callback.func, callback.user_data,
 905                    static_cast<int32_t>(PP_ERROR_FAILED)));
 906   }
 907   const blink::WebDocument& document =
 908       plugin_instance->GetContainer()->element().document();
 909
 910   const GURL& gurl = load_manager->manifest_base_url();
 911   scoped_ptr<blink::WebURLLoader> url_loader(
 912       CreateWebURLLoader(document, gurl));
 913   blink::WebURLRequest request = CreateWebURLRequest(document, gurl);
 914
 915   // ManifestDownloader deletes itself after invoking the callback.
 916   ManifestDownloader* manifest_downloader = new ManifestDownloader(
 917       url_loader.Pass(),
 918       load_manager->is_installed(),
 919       base::Bind(DownloadManifestToBufferCompletion,
 920                  instance, callback, base::Time::Now()));
 921   manifest_downloader->Load(request);
 922 }
 923
 924 void DownloadManifestToBufferCompletion(PP_Instance instance,
 925                                         struct PP_CompletionCallback callback,
 926                                         base::Time start_time,
 927                                         PP_NaClError pp_nacl_error,
 928                                         const std::string& data) {
 929   base::TimeDelta download_time = base::Time::Now() - start_time;
 930   HistogramTimeSmall("NaCl.Perf.StartupTime.ManifestDownload",
 931                      download_time.InMilliseconds());
 932
 933   nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 934   if (!load_manager) {
 935     callback.func(callback.user_data, PP_ERROR_ABORTED);
 936     return;
 937   }
 938
 939   int32_t pp_error;
 940   switch (pp_nacl_error) {
 941     case PP_NACL_ERROR_LOAD_SUCCESS:
 942       pp_error = PP_OK;
 943       break;
 944     case PP_NACL_ERROR_MANIFEST_LOAD_URL:
 945       pp_error = PP_ERROR_FAILED;
 946       load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_LOAD_URL,
 947                                     "could not load manifest url.");
 948       break;
 949     case PP_NACL_ERROR_MANIFEST_TOO_LARGE:
 950       pp_error = PP_ERROR_FILETOOBIG;
 951       load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_TOO_LARGE,
 952                                     "manifest file too large.");
 953       break;
 954     case PP_NACL_ERROR_MANIFEST_NOACCESS_URL:
 955       pp_error = PP_ERROR_NOACCESS;
 956       load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_NOACCESS_URL,
 957                                     "access to manifest url was denied.");
 958       break;
 959     default:
 960       NOTREACHED();
 961       pp_error = PP_ERROR_FAILED;
 962       load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_LOAD_URL,
 963                                     "could not load manifest url.");
 964   }
 965
 966   if (pp_error == PP_OK) {
 967     std::string base_url = load_manager->manifest_base_url().spec();
 968     if (!CreateJsonManifest(instance, base_url, data))
 969       pp_error = PP_ERROR_FAILED;
 970   }
 971   callback.func(callback.user_data, pp_error);
 972 }
 973
 974 bool CreateJsonManifest(PP_Instance instance,
 975                         const std::string& manifest_url,
 976                         const std::string& manifest_data) {
 977   HistogramSizeKB("NaCl.Perf.Size.Manifest",
 978                   static_cast<int32_t>(manifest_data.length() / 1024));
 979
 980   nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
 981   if (!load_manager)
 982     return false;
 983
 984   const char* isa_type;
 985   if (load_manager->IsPNaCl())
 986     isa_type = kPortableArch;
 987   else
 988     isa_type = GetSandboxArch();
 989
 990   scoped_ptr<nacl::JsonManifest> j(
 991       new nacl::JsonManifest(
 992           manifest_url.c_str(),
 993           isa_type,
 994           IsNonSFIModeEnabled(),
 995           PP_ToBool(NaClDebugEnabledForURL(manifest_url.c_str()))));
 996   JsonManifest::ErrorInfo error_info;
 997   if (j->Init(manifest_data.c_str(), &error_info)) {
 998     AddJsonManifest(instance, j.Pass());
 999     return true;
1000   }
1001   load_manager->ReportLoadError(error_info.error, error_info.string);
1002   return false;
1003 }
1004
1005 PP_Bool ManifestGetProgramURL(PP_Instance instance,
1006                               PP_Var* pp_full_url,
1007                               PP_PNaClOptions* pnacl_options,
1008                               PP_Bool* pp_uses_nonsfi_mode) {
1009   nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
1010
1011   JsonManifest* manifest = GetJsonManifest(instance);
1012   if (manifest == NULL)
1013     return PP_FALSE;
1014
1015   bool uses_nonsfi_mode;
1016   std::string full_url;
1017   JsonManifest::ErrorInfo error_info;
1018   if (manifest->GetProgramURL(&full_url, pnacl_options, &uses_nonsfi_mode,
1019                               &error_info)) {
1020     *pp_full_url = ppapi::StringVar::StringToPPVar(full_url);
1021     *pp_uses_nonsfi_mode = PP_FromBool(uses_nonsfi_mode);
1022     return PP_TRUE;
1023   }
1024
1025   if (load_manager)
1026     load_manager->ReportLoadError(error_info.error, error_info.string);
1027   return PP_FALSE;
1028 }
1029
1030 bool ManifestResolveKey(PP_Instance instance,
1031                         bool is_helper_process,
1032                         const std::string& key,
1033                         std::string* full_url,
1034                         PP_PNaClOptions* pnacl_options) {
1035   // For "helper" processes (llc and ld, for PNaCl translation), we resolve
1036   // keys manually as there is no existing .nmf file to parse.
1037   if (is_helper_process) {
1038     pnacl_options->translate = PP_FALSE;
1039     // We can only resolve keys in the files/ namespace.
1040     const std::string kFilesPrefix = "files/";
1041     if (key.find(kFilesPrefix) == std::string::npos) {
1042       nacl::NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
1043       if (load_manager)
1044         load_manager->ReportLoadError(PP_NACL_ERROR_MANIFEST_RESOLVE_URL,
1045                                       "key did not start with files/");
1046       return false;
1047     }
1048     std::string key_basename = key.substr(kFilesPrefix.length());
1049     *full_url = std::string(kPNaClTranslatorBaseUrl) + GetSandboxArch() + "/" +
1050                 key_basename;
1051     return true;
1052   }
1053
1054   JsonManifest* manifest = GetJsonManifest(instance);
1055   if (manifest == NULL)
1056     return false;
1057
1058   return manifest->ResolveKey(key, full_url, pnacl_options);
1059 }
1060
1061 PP_Bool GetPNaClResourceInfo(PP_Instance instance,
1062                              PP_Var* llc_tool_name,
1063                              PP_Var* ld_tool_name) {
1064   static const char kFilename[] = "chrome://pnacl-translator/pnacl.json";
1065   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
1066   DCHECK(load_manager);
1067   if (!load_manager)
1068     return PP_FALSE;
1069
1070   uint64_t nonce_lo = 0;
1071   uint64_t nonce_hi = 0;
1072   base::File file(GetReadonlyPnaclFd(kFilename, false /* is_executable */,
1073                                      &nonce_lo, &nonce_hi));
1074   if (!file.IsValid()) {
1075     load_manager->ReportLoadError(
1076         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1077         "The Portable Native Client (pnacl) component is not "
1078         "installed. Please consult chrome://components for more "
1079         "information.");
1080     return PP_FALSE;
1081   }
1082
1083   base::File::Info file_info;
1084   if (!file.GetInfo(&file_info)) {
1085     load_manager->ReportLoadError(
1086         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1087         std::string("GetPNaClResourceInfo, GetFileInfo failed for: ") +
1088             kFilename);
1089     return PP_FALSE;
1090   }
1091
1092   if (file_info.size > 1 << 20) {
1093     load_manager->ReportLoadError(
1094         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1095         std::string("GetPNaClResourceInfo, file too large: ") + kFilename);
1096     return PP_FALSE;
1097   }
1098
1099   scoped_ptr<char[]> buffer(new char[file_info.size + 1]);
1100   if (buffer.get() == NULL) {
1101     load_manager->ReportLoadError(
1102         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1103         std::string("GetPNaClResourceInfo, couldn't allocate for: ") +
1104             kFilename);
1105     return PP_FALSE;
1106   }
1107
1108   int rc = file.Read(0, buffer.get(), file_info.size);
1109   if (rc < 0) {
1110     load_manager->ReportLoadError(
1111         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1112         std::string("GetPNaClResourceInfo, reading failed for: ") + kFilename);
1113     return PP_FALSE;
1114   }
1115
1116   // Null-terminate the bytes we we read from the file.
1117   buffer.get()[rc] = 0;
1118
1119   // Expect the JSON file to contain a top-level object (dictionary).
1120   Json::Reader json_reader;
1121   Json::Value json_data;
1122   if (!json_reader.parse(buffer.get(), json_data)) {
1123     load_manager->ReportLoadError(
1124         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1125         std::string("Parsing resource info failed: JSON parse error: ") +
1126             json_reader.getFormattedErrorMessages());
1127     return PP_FALSE;
1128   }
1129
1130   if (!json_data.isObject()) {
1131     load_manager->ReportLoadError(
1132         PP_NACL_ERROR_PNACL_RESOURCE_FETCH,
1133         "Parsing resource info failed: Malformed JSON dictionary");
1134     return PP_FALSE;
1135   }
1136
1137   if (json_data.isMember("pnacl-llc-name")) {
1138     Json::Value json_name = json_data["pnacl-llc-name"];
1139     if (json_name.isString()) {
1140       std::string llc_tool_name_str = json_name.asString();
1141       *llc_tool_name = ppapi::StringVar::StringToPPVar(llc_tool_name_str);
1142     }
1143   }
1144
1145   if (json_data.isMember("pnacl-ld-name")) {
1146     Json::Value json_name = json_data["pnacl-ld-name"];
1147     if (json_name.isString()) {
1148       std::string ld_tool_name_str = json_name.asString();
1149       *ld_tool_name = ppapi::StringVar::StringToPPVar(ld_tool_name_str);
1150     }
1151   }
1152   return PP_TRUE;
1153 }
1154
1155 PP_Var GetCpuFeatureAttrs() {
1156   return ppapi::StringVar::StringToPPVar(GetCpuFeatures());
1157 }
1158
1159 // Encapsulates some of the state for a call to DownloadNexe to prevent
1160 // argument lists from getting too long.
1161 struct DownloadNexeRequest {
1162   PP_Instance instance;
1163   std::string url;
1164   PP_CompletionCallback callback;
1165   base::Time start_time;
1166 };
1167
1168 // A utility class to ensure that we don't send progress events more often than
1169 // every 10ms for a given file.
1170 class ProgressEventRateLimiter {
1171  public:
1172   explicit ProgressEventRateLimiter(PP_Instance instance)
1173       : instance_(instance) { }
1174
1175   void ReportProgress(const std::string& url,
1176                       int64_t total_bytes_received,
1177                       int64_t total_bytes_to_be_received) {
1178     base::Time now = base::Time::Now();
1179     if (now - last_event_ > base::TimeDelta::FromMilliseconds(10)) {
1180       DispatchProgressEvent(instance_,
1181                             ProgressEvent(PP_NACL_EVENT_PROGRESS,
1182                                           url,
1183                                           total_bytes_to_be_received >= 0,
1184                                           total_bytes_received,
1185                                           total_bytes_to_be_received));
1186       last_event_ = now;
1187     }
1188   }
1189
1190  private:
1191   PP_Instance instance_;
1192   base::Time last_event_;
1193 };
1194
1195 void DownloadNexeCompletion(const DownloadNexeRequest& request,
1196                             PP_NaClFileInfo* out_file_info,
1197                             FileDownloader::Status status,
1198                             base::File target_file,
1199                             int http_status);
1200
1201 void DownloadNexe(PP_Instance instance,
1202                   const char* url,
1203                   PP_NaClFileInfo* out_file_info,
1204                   PP_CompletionCallback callback) {
1205   CHECK(url);
1206   CHECK(out_file_info);
1207   DownloadNexeRequest request;
1208   request.instance = instance;
1209   request.url = url;
1210   request.callback = callback;
1211   request.start_time = base::Time::Now();
1212
1213   // Try the fast path for retrieving the file first.
1214   PP_FileHandle handle = OpenNaClExecutable(instance,
1215                                             url,
1216                                             &out_file_info->token_lo,
1217                                             &out_file_info->token_hi);
1218   if (handle != PP_kInvalidFileHandle) {
1219     DownloadNexeCompletion(request,
1220                            out_file_info,
1221                            FileDownloader::SUCCESS,
1222                            base::File(handle),
1223                            200);
1224     return;
1225   }
1226
1227   // The fast path didn't work, we'll fetch the file using URLLoader and write
1228   // it to local storage.
1229   base::File target_file(CreateTemporaryFile(instance));
1230   GURL gurl(url);
1231
1232   content::PepperPluginInstance* plugin_instance =
1233       content::PepperPluginInstance::Get(instance);
1234   if (!plugin_instance) {
1235     ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
1236         FROM_HERE,
1237         base::Bind(callback.func, callback.user_data,
1238                    static_cast<int32_t>(PP_ERROR_FAILED)));
1239   }
1240   const blink::WebDocument& document =
1241       plugin_instance->GetContainer()->element().document();
1242   scoped_ptr<blink::WebURLLoader> url_loader(
1243       CreateWebURLLoader(document, gurl));
1244   blink::WebURLRequest url_request = CreateWebURLRequest(document, gurl);
1245
1246   ProgressEventRateLimiter* tracker = new ProgressEventRateLimiter(instance);
1247
1248   // FileDownloader deletes itself after invoking DownloadNexeCompletion.
1249   FileDownloader* file_downloader = new FileDownloader(
1250       url_loader.Pass(),
1251       target_file.Pass(),
1252       base::Bind(&DownloadNexeCompletion, request, out_file_info),
1253       base::Bind(&ProgressEventRateLimiter::ReportProgress,
1254                  base::Owned(tracker), std::string(url)));
1255   file_downloader->Load(url_request);
1256 }
1257
1258 void DownloadNexeCompletion(const DownloadNexeRequest& request,
1259                             PP_NaClFileInfo* out_file_info,
1260                             FileDownloader::Status status,
1261                             base::File target_file,
1262                             int http_status) {
1263   int32_t pp_error = FileDownloaderToPepperError(status);
1264   int64_t bytes_read = -1;
1265   if (pp_error == PP_OK && target_file.IsValid()) {
1266     base::File::Info info;
1267     if (target_file.GetInfo(&info))
1268       bytes_read = info.size;
1269   }
1270
1271   if (bytes_read == -1) {
1272     target_file.Close();
1273     pp_error = PP_ERROR_FAILED;
1274   }
1275
1276   base::TimeDelta download_time = base::Time::Now() - request.start_time;
1277
1278   NexeLoadManager* load_manager = NexeLoadManager::Get(request.instance);
1279   if (load_manager) {
1280     load_manager->NexeFileDidOpen(pp_error,
1281                                   target_file,
1282                                   http_status,
1283                                   bytes_read,
1284                                   request.url,
1285                                   download_time);
1286   }
1287
1288   if (pp_error == PP_OK && target_file.IsValid())
1289     out_file_info->handle = target_file.TakePlatformFile();
1290   else
1291     out_file_info->handle = PP_kInvalidFileHandle;
1292
1293   request.callback.func(request.callback.user_data, pp_error);
1294 }
1295
1296 void DownloadFileCompletion(
1297     const DownloadFileCallback& callback,
1298     FileDownloader::Status status,
1299     base::File file,
1300     int http_status) {
1301   int32_t pp_error = FileDownloaderToPepperError(status);
1302   PP_NaClFileInfo file_info;
1303   if (pp_error == PP_OK) {
1304     file_info.handle = file.TakePlatformFile();
1305     file_info.token_lo = 0;
1306     file_info.token_hi = 0;
1307   } else {
1308     file_info = kInvalidNaClFileInfo;
1309   }
1310
1311   callback.Run(pp_error, file_info);
1312 }
1313
1314 void DownloadFile(PP_Instance instance,
1315                   const std::string& url,
1316                   const DownloadFileCallback& callback) {
1317   DCHECK(ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->
1318              BelongsToCurrentThread());
1319
1320   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
1321   DCHECK(load_manager);
1322   if (!load_manager) {
1323     base::MessageLoop::current()->PostTask(
1324         FROM_HERE,
1325         base::Bind(callback,
1326                    static_cast<int32_t>(PP_ERROR_FAILED),
1327                    kInvalidNaClFileInfo));
1328     return;
1329   }
1330
1331   // Handle special PNaCl support files which are installed on the user's
1332   // machine.
1333   if (url.find(kPNaClTranslatorBaseUrl, 0) == 0) {
1334     PP_NaClFileInfo file_info = kInvalidNaClFileInfo;
1335     PP_FileHandle handle = GetReadonlyPnaclFd(url.c_str(),
1336                                               false /* is_executable */,
1337                                               &file_info.token_lo,
1338                                               &file_info.token_hi);
1339     if (handle == PP_kInvalidFileHandle) {
1340       base::MessageLoop::current()->PostTask(
1341           FROM_HERE,
1342           base::Bind(callback,
1343                      static_cast<int32_t>(PP_ERROR_FAILED),
1344                      kInvalidNaClFileInfo));
1345       return;
1346     }
1347     file_info.handle = handle;
1348     base::MessageLoop::current()->PostTask(
1349         FROM_HERE,
1350         base::Bind(callback, static_cast<int32_t>(PP_OK), file_info));
1351     return;
1352   }
1353
1354   // We have to ensure that this url resolves relative to the plugin base url
1355   // before downloading it.
1356   const GURL& test_gurl = load_manager->plugin_base_url().Resolve(url);
1357   if (!test_gurl.is_valid()) {
1358     base::MessageLoop::current()->PostTask(
1359         FROM_HERE,
1360         base::Bind(callback,
1361                    static_cast<int32_t>(PP_ERROR_FAILED),
1362                    kInvalidNaClFileInfo));
1363     return;
1364   }
1365
1366   // Try the fast path for retrieving the file first.
1367   uint64_t file_token_lo = 0;
1368   uint64_t file_token_hi = 0;
1369   PP_FileHandle file_handle = OpenNaClExecutable(instance,
1370                                                  url.c_str(),
1371                                                  &file_token_lo,
1372                                                  &file_token_hi);
1373   if (file_handle != PP_kInvalidFileHandle) {
1374     PP_NaClFileInfo file_info;
1375     file_info.handle = file_handle;
1376     file_info.token_lo = file_token_lo;
1377     file_info.token_hi = file_token_hi;
1378     base::MessageLoop::current()->PostTask(
1379         FROM_HERE,
1380         base::Bind(callback, static_cast<int32_t>(PP_OK), file_info));
1381     return;
1382   }
1383
1384   // The fast path didn't work, we'll fetch the file using URLLoader and write
1385   // it to local storage.
1386   base::File target_file(CreateTemporaryFile(instance));
1387   GURL gurl(url);
1388
1389   content::PepperPluginInstance* plugin_instance =
1390       content::PepperPluginInstance::Get(instance);
1391   if (!plugin_instance) {
1392     base::MessageLoop::current()->PostTask(
1393         FROM_HERE,
1394         base::Bind(callback,
1395                    static_cast<int32_t>(PP_ERROR_FAILED),
1396                    kInvalidNaClFileInfo));
1397   }
1398   const blink::WebDocument& document =
1399       plugin_instance->GetContainer()->element().document();
1400   scoped_ptr<blink::WebURLLoader> url_loader(
1401       CreateWebURLLoader(document, gurl));
1402   blink::WebURLRequest url_request = CreateWebURLRequest(document, gurl);
1403
1404   ProgressEventRateLimiter* tracker = new ProgressEventRateLimiter(instance);
1405
1406   // FileDownloader deletes itself after invoking DownloadNexeCompletion.
1407   FileDownloader* file_downloader = new FileDownloader(
1408       url_loader.Pass(),
1409       target_file.Pass(),
1410       base::Bind(&DownloadFileCompletion, callback),
1411       base::Bind(&ProgressEventRateLimiter::ReportProgress,
1412                  base::Owned(tracker), std::string(url)));
1413   file_downloader->Load(url_request);
1414 }
1415
1416 void ReportSelLdrStatus(PP_Instance instance,
1417                         int32_t load_status,
1418                         int32_t max_status) {
1419   HistogramEnumerate("NaCl.LoadStatus.SelLdr", load_status, max_status);
1420   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
1421   DCHECK(load_manager);
1422   if (!load_manager)
1423     return;
1424
1425   // Gather data to see if being installed changes load outcomes.
1426   const char* name = load_manager->is_installed() ?
1427       "NaCl.LoadStatus.SelLdr.InstalledApp" :
1428       "NaCl.LoadStatus.SelLdr.NotInstalledApp";
1429   HistogramEnumerate(name, load_status, max_status);
1430 }
1431
1432 void LogTranslateTime(const char* histogram_name,
1433                       int64_t time_in_us) {
1434   ppapi::PpapiGlobals::Get()->GetMainThreadMessageLoop()->PostTask(
1435       FROM_HERE,
1436       base::Bind(&HistogramTimeTranslation,
1437                  std::string(histogram_name),
1438                  time_in_us / 1000));
1439 }
1440
1441 void DidOpenManifestEntry(PP_NaClFileInfo* out_file_info,
1442                           PP_CompletionCallback callback,
1443                           int32_t pp_error,
1444                           const PP_NaClFileInfo& file_info) {
1445   if (pp_error == PP_OK)
1446     *out_file_info = file_info;
1447   callback.func(callback.user_data, pp_error);
1448 }
1449
1450 void OpenManifestEntry(PP_Instance instance,
1451                        PP_Bool is_helper_process,
1452                        const char* key,
1453                        PP_NaClFileInfo* out_file_info,
1454                        PP_CompletionCallback callback) {
1455   std::string url;
1456   PP_PNaClOptions pnacl_options;
1457   pnacl_options.translate = PP_FALSE;
1458   pnacl_options.is_debug = PP_FALSE;
1459   pnacl_options.opt_level = 2;
1460   if (!ManifestResolveKey(instance,
1461                           PP_ToBool(is_helper_process),
1462                           key,
1463                           &url,
1464                           &pnacl_options)) {
1465     PostPPCompletionCallback(callback, PP_ERROR_FAILED);
1466   }
1467
1468   // TODO(teravest): Make a type like PP_NaClFileInfo to use for DownloadFile
1469   // that would close the file handle on destruction.
1470   DownloadFile(instance, url,
1471                base::Bind(&DidOpenManifestEntry, out_file_info, callback));
1472 }
1473
1474 void SetPNaClStartTime(PP_Instance instance) {
1475   NexeLoadManager* load_manager = NexeLoadManager::Get(instance);
1476   if (load_manager)
1477     load_manager->set_pnacl_start_time(base::Time::Now());
1478 }
1479
1480 // PexeDownloader is responsible for deleting itself when the download
1481 // finishes.
1482 class PexeDownloader : public blink::WebURLLoaderClient {
1483  public:
1484   PexeDownloader(PP_Instance instance,
1485                  scoped_ptr<blink::WebURLLoader> url_loader,
1486                  const std::string& pexe_url,
1487                  int32_t pexe_opt_level,
1488                  const PPP_PexeStreamHandler* stream_handler,
1489                  void* stream_handler_user_data)
1490       : instance_(instance),
1491         url_loader_(url_loader.Pass()),
1492         pexe_url_(pexe_url),
1493         pexe_opt_level_(pexe_opt_level),
1494         stream_handler_(stream_handler),
1495         stream_handler_user_data_(stream_handler_user_data),
1496         success_(false),
1497         expected_content_length_(-1),
1498         weak_factory_(this) { }
1499
1500   void Load(const blink::WebURLRequest& request) {
1501     url_loader_->loadAsynchronously(request, this);
1502   }
1503
1504  private:
1505   virtual void didReceiveResponse(blink::WebURLLoader* loader,
1506                                   const blink::WebURLResponse& response) {
1507     success_ = (response.httpStatusCode() == 200);
1508     if (!success_)
1509       return;
1510
1511     expected_content_length_ = response.expectedContentLength();
1512
1513     // Defer loading after receiving headers. This is because we may already
1514     // have a cached translated nexe, so check for that now.
1515     url_loader_->setDefersLoading(true);
1516
1517     std::string etag = response.httpHeaderField("etag").utf8();
1518     std::string last_modified =
1519         response.httpHeaderField("last-modified").utf8();
1520     base::Time last_modified_time;
1521     base::Time::FromString(last_modified.c_str(), &last_modified_time);
1522
1523     bool has_no_store_header = false;
1524     std::string cache_control =
1525         response.httpHeaderField("cache-control").utf8();
1526
1527     std::vector<std::string> values;
1528     base::SplitString(cache_control, ',', &values);
1529     for (std::vector<std::string>::const_iterator it = values.begin();
1530          it != values.end();
1531          ++it) {
1532       if (base::StringToLowerASCII(*it) == "no-store")
1533         has_no_store_header = true;
1534     }
1535
1536     GetNexeFd(instance_,
1537               pexe_url_,
1538               pexe_opt_level_,
1539               last_modified_time,
1540               etag,
1541               has_no_store_header,
1542               base::Bind(&PexeDownloader::didGetNexeFd,
1543                          weak_factory_.GetWeakPtr()));
1544   }
1545
1546   virtual void didGetNexeFd(int32_t pp_error,
1547                             bool cache_hit,
1548                             PP_FileHandle file_handle) {
1549     if (!content::PepperPluginInstance::Get(instance_)) {
1550       delete this;
1551       return;
1552     }
1553
1554     HistogramEnumerate("NaCl.Perf.PNaClCache.IsHit", cache_hit, 2);
1555     if (cache_hit) {
1556       stream_handler_->DidCacheHit(stream_handler_user_data_, file_handle);
1557
1558       // We delete the PexeDownloader at this point since we successfully got a
1559       // cached, translated nexe.
1560       delete this;
1561       return;
1562     }
1563     stream_handler_->DidCacheMiss(stream_handler_user_data_,
1564                                   expected_content_length_,
1565                                   file_handle);
1566
1567     // No translated nexe was found in the cache, so we should download the
1568     // file to start streaming it.
1569     url_loader_->setDefersLoading(false);
1570   }
1571
1572   virtual void didReceiveData(blink::WebURLLoader* loader,
1573                               const char* data,
1574                               int data_length,
1575                               int encoded_data_length) {
1576     if (content::PepperPluginInstance::Get(instance_)) {
1577       // Stream the data we received to the stream callback.
1578       stream_handler_->DidStreamData(stream_handler_user_data_,
1579                                      data,
1580                                      data_length);
1581     }
1582   }
1583
1584   virtual void didFinishLoading(blink::WebURLLoader* loader,
1585                                 double finish_time,
1586                                 int64_t total_encoded_data_length) {
1587     int32_t result = success_ ? PP_OK : PP_ERROR_FAILED;
1588
1589     if (content::PepperPluginInstance::Get(instance_))
1590       stream_handler_->DidFinishStream(stream_handler_user_data_, result);
1591     delete this;
1592   }
1593
1594   virtual void didFail(blink::WebURLLoader* loader,
1595                        const blink::WebURLError& error) {
1596     success_ = false;
1597   }
1598
1599   PP_Instance instance_;
1600   scoped_ptr<blink::WebURLLoader> url_loader_;
1601   std::string pexe_url_;
1602   int32_t pexe_opt_level_;
1603   const PPP_PexeStreamHandler* stream_handler_;
1604   void* stream_handler_user_data_;
1605   bool success_;
1606   int64_t expected_content_length_;
1607   base::WeakPtrFactory<PexeDownloader> weak_factory_;
1608 };
1609
1610 void StreamPexe(PP_Instance instance,
1611                 const char* pexe_url,
1612                 int32_t opt_level,
1613                 const PPP_PexeStreamHandler* handler,
1614                 void* handler_user_data) {
1615   content::PepperPluginInstance* plugin_instance =
1616       content::PepperPluginInstance::Get(instance);
1617   if (!plugin_instance) {
1618     base::MessageLoop::current()->PostTask(
1619         FROM_HERE,
1620         base::Bind(handler->DidFinishStream,
1621                    handler_user_data,
1622                    static_cast<int32_t>(PP_ERROR_FAILED)));
1623     return;
1624   }
1625
1626   GURL gurl(pexe_url);
1627   const blink::WebDocument& document =
1628       plugin_instance->GetContainer()->element().document();
1629   scoped_ptr<blink::WebURLLoader> url_loader(
1630       CreateWebURLLoader(document, gurl));
1631   PexeDownloader* downloader = new PexeDownloader(instance,
1632                                                   url_loader.Pass(),
1633                                                   pexe_url,
1634                                                   opt_level,
1635                                                   handler,
1636                                                   handler_user_data);
1637
1638   blink::WebURLRequest url_request = CreateWebURLRequest(document, gurl);
1639   // Mark the request as requesting a PNaCl bitcode file,
1640   // so that component updater can detect this user action.
1641   url_request.addHTTPHeaderField(
1642       blink::WebString::fromUTF8("Accept"),
1643       blink::WebString::fromUTF8("application/x-pnacl, */*"));
1644   url_request.setRequestContext(blink::WebURLRequest::RequestContextObject);
1645   downloader->Load(url_request);
1646 }
1647
1648 const PPB_NaCl_Private nacl_interface = {
1649   &LaunchSelLdr,
1650   &StartPpapiProxy,
1651   &UrandomFD,
1652   &Are3DInterfacesDisabled,
1653   &BrokerDuplicateHandle,
1654   &GetReadExecPnaclFd,
1655   &CreateTemporaryFile,
1656   &GetNumberOfProcessors,
1657   &PPIsNonSFIModeEnabled,
1658   &ReportTranslationFinished,
1659   &DispatchEvent,
1660   &ReportLoadSuccess,
1661   &ReportLoadError,
1662   &ReportLoadAbort,
1663   &InstanceCreated,
1664   &InstanceDestroyed,
1665   &NaClDebugEnabledForURL,
1666   &GetSandboxArch,
1667   &LogToConsole,
1668   &GetNaClReadyState,
1669   &Vlog,
1670   &InitializePlugin,
1671   &GetNexeSize,
1672   &RequestNaClManifest,
1673   &GetManifestBaseURL,
1674   &ProcessNaClManifest,
1675   &DevInterfacesEnabled,
1676   &ManifestGetProgramURL,
1677   &GetPNaClResourceInfo,
1678   &GetCpuFeatureAttrs,
1679   &DownloadNexe,
1680   &ReportSelLdrStatus,
1681   &LogTranslateTime,
1682   &OpenManifestEntry,
1683   &SetPNaClStartTime,
1684   &StreamPexe
1685 };
1686
1687 }  // namespace
1688
1689 const PPB_NaCl_Private* GetNaClPrivateInterface() {
1690   return &nacl_interface;
1691 }
1692
1693 }  // namespace nacl