win8/delegate_execute/delegate_execute.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 <atlbase.h>
   6 #include <atlcom.h>
   7 #include <atlctl.h>
   8 #include <initguid.h>
   9 #include <shellapi.h>
  10
  11 #include "base/at_exit.h"
  12 #include "base/command_line.h"
  13 #include "base/files/file_util.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/process/kill.h"
  16 #include "base/strings/string16.h"
  17 #include "base/win/scoped_com_initializer.h"
  18 #include "base/win/scoped_comptr.h"
  19 #include "base/win/scoped_handle.h"
  20 #include "base/win/windows_version.h"
  21 #include "breakpad/src/client/windows/handler/exception_handler.h"
  22 #include "chrome/common/chrome_switches.h"
  23 #include "chrome/installer/util/browser_distribution.h"
  24 #include "win8/delegate_execute/command_execute_impl.h"
  25 #include "win8/delegate_execute/crash_server_init.h"
  26 #include "win8/delegate_execute/delegate_execute_operation.h"
  27 #include "win8/delegate_execute/resource.h"
  28
  29 using namespace ATL;
  30
  31 // Usually classes derived from CAtlExeModuleT, or other types of ATL
  32 // COM module classes statically define their CLSID at compile time through
  33 // the use of various macros, and ATL internals takes care of creating the
  34 // class objects and registering them.  However, we need to register the same
  35 // object with different CLSIDs depending on a runtime setting, so we handle
  36 // that logic here, before the main ATL message loop runs.
  37 class DelegateExecuteModule
  38     : public ATL::CAtlExeModuleT< DelegateExecuteModule > {
  39  public :
  40   typedef ATL::CAtlExeModuleT<DelegateExecuteModule> ParentClass;
  41   typedef CComObject<CommandExecuteImpl> ImplType;
  42
  43   DelegateExecuteModule()
  44       : registration_token_(0) {
  45   }
  46
  47   HRESULT PreMessageLoop(int nShowCmd) {
  48     HRESULT hr = S_OK;
  49     base::string16 clsid_string;
  50     GUID clsid;
  51     BrowserDistribution* dist = BrowserDistribution::GetDistribution();
  52     if (!dist->GetCommandExecuteImplClsid(&clsid_string))
  53       return E_FAIL;
  54     hr = ::CLSIDFromString(clsid_string.c_str(), &clsid);
  55     if (FAILED(hr))
  56       return hr;
  57
  58     // We use the same class creation logic as ATL itself.  See
  59     // _ATL_OBJMAP_ENTRY::RegisterClassObject() in atlbase.h
  60     hr = ImplType::_ClassFactoryCreatorClass::CreateInstance(
  61         ImplType::_CreatorClass::CreateInstance, IID_IUnknown,
  62         instance_.ReceiveVoid());
  63     if (FAILED(hr))
  64       return hr;
  65     hr = ::CoRegisterClassObject(clsid, instance_, CLSCTX_LOCAL_SERVER,
  66         REGCLS_MULTIPLEUSE | REGCLS_SUSPENDED, &registration_token_);
  67     if (FAILED(hr))
  68       return hr;
  69
  70     return ParentClass::PreMessageLoop(nShowCmd);
  71   }
  72
  73   HRESULT PostMessageLoop() {
  74     if (registration_token_ != 0) {
  75       ::CoRevokeClassObject(registration_token_);
  76       registration_token_ = 0;
  77     }
  78
  79     instance_.Release();
  80
  81     return ParentClass::PostMessageLoop();
  82   }
  83
  84  private:
  85   base::win::ScopedComPtr<IUnknown> instance_;
  86   DWORD registration_token_;
  87 };
  88
  89 DelegateExecuteModule _AtlModule;
  90
  91 using delegate_execute::DelegateExecuteOperation;
  92 using base::win::ScopedHandle;
  93
  94 int RelaunchChrome(const DelegateExecuteOperation& operation) {
  95   AtlTrace("Relaunching [%ls] with flags [%ls]\n",
  96            operation.mutex().c_str(), operation.relaunch_flags().c_str());
  97   ScopedHandle mutex(OpenMutexW(SYNCHRONIZE, FALSE, operation.mutex().c_str()));
  98   if (mutex.IsValid()) {
  99     const int kWaitSeconds = 5;
 100     DWORD result = ::WaitForSingleObject(mutex, kWaitSeconds * 1000);
 101     if (result == WAIT_ABANDONED) {
 102       // This is the normal case. Chrome exits and windows marks the mutex as
 103       // abandoned.
 104     } else if (result == WAIT_OBJECT_0) {
 105       // This is unexpected. Check if somebody is not closing the mutex on
 106       // RelaunchChromehelper, the mutex should not be closed.
 107       AtlTrace("Unexpected release of the relaunch mutex!!\n");
 108     } else if (result == WAIT_TIMEOUT) {
 109       // This could mean that Chrome is hung. Proceed to exterminate.
 110       DWORD pid = operation.GetParentPid();
 111       AtlTrace("%ds timeout. Killing Chrome %d\n", kWaitSeconds, pid);
 112       base::KillProcessById(pid, 0, false);
 113     } else {
 114       AtlTrace("Failed to wait for relaunch mutex, result is 0x%x\n", result);
 115     }
 116   } else {
 117     // It is possible that chrome exits so fast that the mutex is not there.
 118     AtlTrace("No relaunch mutex found\n");
 119   }
 120
 121   // On Windows 8+ to launch Chrome we rely on Windows to use the
 122   // IExecuteCommand interface exposed by delegate_execute to launch Chrome
 123   // into Windows 8 metro mode or desktop.
 124   // On Windows 7 we don't use delegate_execute and instead use plain vanilla
 125   // ShellExecute to launch Chrome into ASH or desktop.
 126   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
 127     base::win::ScopedCOMInitializer com_initializer;
 128
 129     base::string16 relaunch_flags(operation.relaunch_flags());
 130     SHELLEXECUTEINFO sei = { sizeof(sei) };
 131     sei.fMask = SEE_MASK_FLAG_LOG_USAGE;
 132     sei.nShow = SW_SHOWNORMAL;
 133     sei.lpFile = operation.shortcut().value().c_str();
 134     sei.lpParameters = relaunch_flags.c_str();
 135
 136     AtlTrace(L"Relaunching Chrome via shortcut [%ls]\n", sei.lpFile);
 137
 138     if (!::ShellExecuteExW(&sei)) {
 139       int error = HRESULT_FROM_WIN32(::GetLastError());
 140       AtlTrace("ShellExecute returned 0x%08X\n", error);
 141       return error;
 142     }
 143   } else {
 144     base::FilePath chrome_exe_path;
 145     bool found_exe = CommandExecuteImpl::FindChromeExe(&chrome_exe_path);
 146     DCHECK(found_exe);
 147     if (found_exe) {
 148       bool launch_ash = CommandLine::ForCurrentProcess()->HasSwitch(
 149           switches::kForceImmersive);
 150       if (launch_ash) {
 151         AtlTrace(L"Relaunching Chrome into Windows ASH on Windows 7\n");
 152       } else {
 153         AtlTrace(L"Relaunching Chrome into Desktop From ASH on Windows 7\n");
 154       }
 155       SHELLEXECUTEINFO sei = { sizeof(sei) };
 156       sei.fMask = SEE_MASK_FLAG_LOG_USAGE;
 157       sei.nShow = SW_SHOWNORMAL;
 158       // No point in using the shortcut if we are launching into ASH as any
 159       // additonal command line switches specified in the shortcut will be
 160       // ignored. This is because we don't have a good way to send the command
 161       // line switches from the viewer to the browser process.
 162       sei.lpFile = (launch_ash || operation.shortcut().empty()) ?
 163             chrome_exe_path.value().c_str() :
 164                 operation.shortcut().value().c_str();
 165       sei.lpParameters =
 166           launch_ash ? L"-ServerName:DefaultBrowserServer" : NULL;
 167       if (!::ShellExecuteExW(&sei)) {
 168         int error = HRESULT_FROM_WIN32(::GetLastError());
 169         AtlTrace("ShellExecute returned 0x%08X\n", error);
 170         return error;
 171       }
 172     }
 173   }
 174   return S_OK;
 175 }
 176
 177 extern "C" int WINAPI _tWinMain(HINSTANCE , HINSTANCE, LPTSTR, int nShowCmd) {
 178   scoped_ptr<google_breakpad::ExceptionHandler> breakpad =
 179       delegate_execute::InitializeCrashReporting();
 180
 181   base::AtExitManager exit_manager;
 182   AtlTrace("delegate_execute enter\n");
 183
 184   CommandLine::Init(0, NULL);
 185   HRESULT ret_code = E_UNEXPECTED;
 186   DelegateExecuteOperation operation;
 187   if (operation.Init(CommandLine::ForCurrentProcess())) {
 188     switch (operation.operation_type()) {
 189       case DelegateExecuteOperation::DELEGATE_EXECUTE:
 190         ret_code = _AtlModule.WinMain(nShowCmd);
 191         break;
 192       case DelegateExecuteOperation::RELAUNCH_CHROME:
 193         ret_code = RelaunchChrome(operation);
 194         break;
 195       default:
 196         NOTREACHED();
 197     }
 198   }
 199   AtlTrace("delegate_execute exit, code = %d\n", ret_code);
 200   return ret_code;
 201 }