chrome/app/client_util.cc

   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 #include <windows.h>
   6 #include <shlwapi.h>
   7
   8 #include "base/base_paths.h"
   9 #include "base/command_line.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/environment.h"
  12 #include "base/file_version_info.h"
  13 #include "base/lazy_instance.h"
  14 #include "base/logging.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/path_service.h"
  17 #include "base/strings/string16.h"
  18 #include "base/strings/string_util.h"
  19 #include "base/strings/stringprintf.h"
  20 #include "base/strings/utf_string_conversions.h"
  21 #include "base/trace_event/trace_event.h"
  22 #include "base/version.h"
  23 #include "base/win/scoped_handle.h"
  24 #include "base/win/windows_version.h"
  25 #include "chrome/app/chrome_crash_reporter_client.h"
  26 #include "chrome/app/chrome_watcher_client_win.h"
  27 #include "chrome/app/chrome_watcher_command_line_win.h"
  28 #include "chrome/app/client_util.h"
  29 #include "chrome/app/image_pre_reader_win.h"
  30 #include "chrome/app/kasko_client.h"
  31 #include "chrome/chrome_watcher/chrome_watcher_main_api.h"
  32 #include "chrome/common/chrome_constants.h"
  33 #include "chrome/common/chrome_paths.h"
  34 #include "chrome/common/chrome_result_codes.h"
  35 #include "chrome/common/chrome_switches.h"
  36 #include "chrome/common/env_vars.h"
  37 #include "chrome/installer/util/google_update_constants.h"
  38 #include "chrome/installer/util/google_update_settings.h"
  39 #include "chrome/installer/util/install_util.h"
  40 #include "chrome/installer/util/util_constants.h"
  41 #include "components/crash/app/breakpad_win.h"
  42 #include "components/crash/app/crash_reporter_client.h"
  43 #include "components/metrics/client_info.h"
  44 #include "content/public/app/startup_helper_win.h"
  45 #include "sandbox/win/src/sandbox.h"
  46
  47 namespace {
  48 // The entry point signature of chrome.dll.
  49 typedef int (*DLL_MAIN)(HINSTANCE, sandbox::SandboxInterfaceInfo*);
  50
  51 typedef void (*RelaunchChromeBrowserWithNewCommandLineIfNeededFunc)();
  52
  53 base::LazyInstance<chrome::ChromeCrashReporterClient>::Leaky
  54     g_chrome_crash_client = LAZY_INSTANCE_INITIALIZER;
  55
  56 // Loads |module| after setting the CWD to |module|'s directory. Returns a
  57 // reference to the loaded module on success, or null on error.
  58 HMODULE LoadModuleWithDirectory(const base::FilePath& module, bool pre_read) {
  59   ::SetCurrentDirectoryW(module.DirName().value().c_str());
  60
  61   if (pre_read) {
  62     // We pre-read the binary to warm the memory caches (fewer hard faults to
  63     // page parts of the binary in).
  64     const size_t kStepSize = 1024 * 1024;
  65     size_t percent = 100;
  66     ImagePreReader::PartialPreReadImage(module.value().c_str(), percent,
  67                                         kStepSize);
  68   }
  69
  70   return ::LoadLibraryExW(module.value().c_str(), nullptr,
  71                           LOAD_WITH_ALTERED_SEARCH_PATH);
  72 }
  73
  74 void RecordDidRun(const base::FilePath& dll_path) {
  75   bool system_level = !InstallUtil::IsPerUserInstall(dll_path);
  76   GoogleUpdateSettings::UpdateDidRunState(true, system_level);
  77 }
  78
  79 void ClearDidRun(const base::FilePath& dll_path) {
  80   bool system_level = !InstallUtil::IsPerUserInstall(dll_path);
  81   GoogleUpdateSettings::UpdateDidRunState(false, system_level);
  82 }
  83
  84 bool InMetroMode() {
  85   return (wcsstr(
  86       ::GetCommandLineW(), L" -ServerName:DefaultBrowserServer") != nullptr);
  87 }
  88
  89 typedef int (*InitMetro)();
  90
  91 // Returns the directory in which the currently running executable resides.
  92 base::FilePath GetExecutableDir() {
  93   base::char16 path[MAX_PATH];
  94   ::GetModuleFileNameW(nullptr, path, MAX_PATH);
  95   return base::FilePath(path).DirName();
  96 }
  97
  98 }  // namespace
  99
 100 base::string16 GetCurrentModuleVersion() {
 101   scoped_ptr<FileVersionInfo> file_version_info(
 102       FileVersionInfo::CreateFileVersionInfoForCurrentModule());
 103   if (file_version_info.get()) {
 104     base::string16 version_string(file_version_info->file_version());
 105     if (Version(base::UTF16ToASCII(version_string)).IsValid())
 106       return version_string;
 107   }
 108   return base::string16();
 109 }
 110
 111 //=============================================================================
 112
 113 MainDllLoader::MainDllLoader()
 114   : dll_(nullptr), metro_mode_(InMetroMode()) {
 115 }
 116
 117 MainDllLoader::~MainDllLoader() {
 118 }
 119
 120 // Loading chrome is an interesting affair. First we try loading from the
 121 // current directory to support run-what-you-compile and other development
 122 // scenarios.
 123 // If that fails then we look at the version resource in the current
 124 // module. This is the expected path for chrome.exe browser instances in an
 125 // installed build.
 126 HMODULE MainDllLoader::Load(base::string16* version, base::FilePath* module) {
 127   const base::char16* dll_name = nullptr;
 128   if (metro_mode_) {
 129     dll_name = installer::kChromeMetroDll;
 130   } else if (process_type_ == "service" || process_type_.empty()) {
 131     dll_name = installer::kChromeDll;
 132   } else if (process_type_ == "watcher") {
 133     dll_name = kChromeWatcherDll;
 134   } else {
 135 #if defined(CHROME_MULTIPLE_DLL)
 136     dll_name = installer::kChromeChildDll;
 137 #else
 138     dll_name = installer::kChromeDll;
 139 #endif
 140   }
 141
 142   const bool pre_read = !metro_mode_;
 143   base::FilePath module_dir = GetExecutableDir();
 144   *module = module_dir.Append(dll_name);
 145   HMODULE dll = LoadModuleWithDirectory(*module, pre_read);
 146   if (!dll) {
 147     base::string16 version_string(GetCurrentModuleVersion());
 148     if (version_string.empty()) {
 149       LOG(ERROR) << "No valid Chrome version found";
 150       return nullptr;
 151     }
 152     *version = version_string;
 153     *module = module_dir.Append(version_string).Append(dll_name);
 154     dll = LoadModuleWithDirectory(*module, pre_read);
 155     if (!dll) {
 156       PLOG(ERROR) << "Failed to load Chrome DLL from " << module->value();
 157       return nullptr;
 158     }
 159   }
 160
 161   DCHECK(dll);
 162   return dll;
 163 }
 164
 165 // Launching is a matter of loading the right dll, setting the CHROME_VERSION
 166 // environment variable and just calling the entry point. Derived classes can
 167 // add custom code in the OnBeforeLaunch callback.
 168 int MainDllLoader::Launch(HINSTANCE instance) {
 169   const base::CommandLine& cmd_line = *base::CommandLine::ForCurrentProcess();
 170   process_type_ = cmd_line.GetSwitchValueASCII(switches::kProcessType);
 171
 172   base::string16 version;
 173   base::FilePath file;
 174
 175   if (metro_mode_) {
 176     HMODULE metro_dll = Load(&version, &file);
 177     if (!metro_dll)
 178       return chrome::RESULT_CODE_MISSING_DATA;
 179
 180     InitMetro chrome_metro_main =
 181         reinterpret_cast<InitMetro>(::GetProcAddress(metro_dll, "InitMetro"));
 182     return chrome_metro_main();
 183   }
 184
 185   if (process_type_ == "watcher") {
 186     chrome::RegisterPathProvider();
 187
 188     base::win::ScopedHandle parent_process;
 189     base::win::ScopedHandle on_initialized_event;
 190     if (!InterpretChromeWatcherCommandLine(cmd_line, &parent_process,
 191                                            &on_initialized_event)) {
 192       return chrome::RESULT_CODE_UNSUPPORTED_PARAM;
 193     }
 194
 195     base::FilePath watcher_data_directory;
 196     if (!PathService::Get(chrome::DIR_WATCHER_DATA, &watcher_data_directory))
 197       return chrome::RESULT_CODE_MISSING_DATA;
 198
 199     // Intentionally leaked.
 200     HMODULE watcher_dll = Load(&version, &file);
 201     if (!watcher_dll)
 202       return chrome::RESULT_CODE_MISSING_DATA;
 203
 204     ChromeWatcherMainFunction watcher_main =
 205         reinterpret_cast<ChromeWatcherMainFunction>(
 206             ::GetProcAddress(watcher_dll, kChromeWatcherDLLEntrypoint));
 207     return watcher_main(chrome::kBrowserExitCodesRegistryPath,
 208                         parent_process.Take(), on_initialized_event.Take(),
 209                         watcher_data_directory.value().c_str());
 210   }
 211
 212   // Initialize the sandbox services.
 213   sandbox::SandboxInterfaceInfo sandbox_info = {0};
 214   content::InitializeSandboxInfo(&sandbox_info);
 215
 216   crash_reporter::SetCrashReporterClient(g_chrome_crash_client.Pointer());
 217   bool exit_now = true;
 218   if (process_type_.empty()) {
 219     if (breakpad::ShowRestartDialogIfCrashed(&exit_now)) {
 220       // We restarted because of a previous crash. Ask user if we should
 221       // Relaunch. Only for the browser process. See crbug.com/132119.
 222       if (exit_now)
 223         return content::RESULT_CODE_NORMAL_EXIT;
 224     }
 225   }
 226   breakpad::InitCrashReporter(process_type_);
 227
 228   dll_ = Load(&version, &file);
 229   if (!dll_)
 230     return chrome::RESULT_CODE_MISSING_DATA;
 231
 232   scoped_ptr<base::Environment> env(base::Environment::Create());
 233   env->SetVar(chrome::kChromeVersionEnvVar, base::WideToUTF8(version));
 234
 235   OnBeforeLaunch(process_type_, file);
 236   DLL_MAIN chrome_main =
 237       reinterpret_cast<DLL_MAIN>(::GetProcAddress(dll_, "ChromeMain"));
 238   int rc = chrome_main(instance, &sandbox_info);
 239   rc = OnBeforeExit(rc, file);
 240   // Sandboxed processes close some system DLL handles after lockdown so ignore
 241   // EXCEPTION_INVALID_HANDLE generated on Windows 10 during shutdown of these
 242   // processes.
 243   // TODO(wfh): Check whether MS have fixed this in Win10 RTM. crbug.com/456193
 244   if (base::win::GetVersion() >= base::win::VERSION_WIN10)
 245     breakpad::ConsumeInvalidHandleExceptions();
 246   return rc;
 247 }
 248
 249 void MainDllLoader::RelaunchChromeBrowserWithNewCommandLineIfNeeded() {
 250   if (!dll_)
 251     return;
 252
 253   RelaunchChromeBrowserWithNewCommandLineIfNeededFunc relaunch_function =
 254       reinterpret_cast<RelaunchChromeBrowserWithNewCommandLineIfNeededFunc>(
 255           ::GetProcAddress(dll_,
 256                            "RelaunchChromeBrowserWithNewCommandLineIfNeeded"));
 257   if (!relaunch_function) {
 258     LOG(ERROR) << "Could not find exported function "
 259                << "RelaunchChromeBrowserWithNewCommandLineIfNeeded";
 260   } else {
 261     relaunch_function();
 262   }
 263 }
 264
 265 //=============================================================================
 266
 267 class ChromeDllLoader : public MainDllLoader {
 268  protected:
 269   // MainDllLoader implementation.
 270   void OnBeforeLaunch(const std::string& process_type,
 271                       const base::FilePath& dll_path) override;
 272   int OnBeforeExit(int return_code, const base::FilePath& dll_path) override;
 273
 274  private:
 275   scoped_ptr<ChromeWatcherClient> chrome_watcher_client_;
 276 #if defined(SYZYASAN)
 277   scoped_ptr<KaskoClient> kasko_client_;
 278 #endif
 279 };
 280
 281 void ChromeDllLoader::OnBeforeLaunch(const std::string& process_type,
 282                                      const base::FilePath& dll_path) {
 283   if (process_type.empty()) {
 284     RecordDidRun(dll_path);
 285
 286     // Launch the watcher process if stats collection consent has been granted.
 287     if (g_chrome_crash_client.Get().GetCollectStatsConsent()) {
 288       base::FilePath exe_path;
 289       if (PathService::Get(base::FILE_EXE, &exe_path)) {
 290         chrome_watcher_client_.reset(new ChromeWatcherClient(
 291             base::Bind(&GenerateChromeWatcherCommandLine, exe_path)));
 292         if (chrome_watcher_client_->LaunchWatcher()) {
 293 #if defined(SYZYASAN)
 294           kasko_client_.reset(new KaskoClient(chrome_watcher_client_.get()));
 295 #endif
 296         }
 297       }
 298     }
 299   }
 300 }
 301
 302 int ChromeDllLoader::OnBeforeExit(int return_code,
 303                                   const base::FilePath& dll_path) {
 304   // NORMAL_EXIT_CANCEL is used for experiments when the user cancels
 305   // so we need to reset the did_run signal so omaha does not count
 306   // this run as active usage.
 307   if (chrome::RESULT_CODE_NORMAL_EXIT_CANCEL == return_code) {
 308     ClearDidRun(dll_path);
 309   }
 310
 311 #if defined(SYZYASAN)
 312   kasko_client_.reset();
 313 #endif
 314   chrome_watcher_client_.reset();
 315
 316   return return_code;
 317 }
 318
 319 //=============================================================================
 320
 321 class ChromiumDllLoader : public MainDllLoader {
 322  protected:
 323   void OnBeforeLaunch(const std::string& process_type,
 324                       const base::FilePath& dll_path) override {}
 325   int OnBeforeExit(int return_code, const base::FilePath& dll_path) override {
 326     return return_code;
 327   }
 328 };
 329
 330 MainDllLoader* MakeMainDllLoader() {
 331 #if defined(GOOGLE_CHROME_BUILD)
 332   return new ChromeDllLoader();
 333 #else
 334   return new ChromiumDllLoader();
 335 #endif
 336 }