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     GUID clsid;
  50     BrowserDistribution* dist = BrowserDistribution::GetDistribution();
  51     const base::string16 clsid_string = dist->GetCommandExecuteImplClsid();
  52     if (clsid_string.empty())
  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_.get(), CLSCTX_LOCAL_SERVER,
  66                                  REGCLS_MULTIPLEUSE | REGCLS_SUSPENDED,
  67                                  &registration_token_);
  68     if (FAILED(hr))
  69       return hr;
  70
  71     return ParentClass::PreMessageLoop(nShowCmd);
  72   }
  73
  74   HRESULT PostMessageLoop() {
  75     if (registration_token_ != 0) {
  76       ::CoRevokeClassObject(registration_token_);
  77       registration_token_ = 0;
  78     }
  79
  80     instance_.Release();
  81
  82     return ParentClass::PostMessageLoop();
  83   }
  84
  85  private:
  86   base::win::ScopedComPtr<IUnknown> instance_;
  87   DWORD registration_token_;
  88 };
  89
  90 DelegateExecuteModule _AtlModule;
  91
  92 using delegate_execute::DelegateExecuteOperation;
  93 using base::win::ScopedHandle;
  94
  95 int RelaunchChrome(const DelegateExecuteOperation& operation) {
  96   AtlTrace("Relaunching [%ls] with flags [%ls]\n",
  97            operation.mutex().c_str(), operation.relaunch_flags().c_str());
  98   ScopedHandle mutex(OpenMutexW(SYNCHRONIZE, FALSE, operation.mutex().c_str()));
  99   if (mutex.IsValid()) {
 100     const int kWaitSeconds = 5;
 101     DWORD result = ::WaitForSingleObject(mutex.Get(), kWaitSeconds * 1000);
 102     if (result == WAIT_ABANDONED) {
 103       // This is the normal case. Chrome exits and windows marks the mutex as
 104       // abandoned.
 105     } else if (result == WAIT_OBJECT_0) {
 106       // This is unexpected. Check if somebody is not closing the mutex on
 107       // RelaunchChromehelper, the mutex should not be closed.
 108       AtlTrace("Unexpected release of the relaunch mutex!!\n");
 109     } else if (result == WAIT_TIMEOUT) {
 110       // This could mean that Chrome is hung. Proceed to exterminate.
 111       base::Process process = operation.GetParent();
 112       AtlTrace("%ds timeout. Killing Chrome %d\n", kWaitSeconds, process.Pid());
 113       process.Terminate(0, false);
 114     } else {
 115       AtlTrace("Failed to wait for relaunch mutex, result is 0x%x\n", result);
 116     }
 117   } else {
 118     // It is possible that chrome exits so fast that the mutex is not there.
 119     AtlTrace("No relaunch mutex found\n");
 120   }
 121
 122   // On Windows 8+ to launch Chrome we rely on Windows to use the
 123   // IExecuteCommand interface exposed by delegate_execute to launch Chrome
 124   // into Windows 8 metro mode or desktop.
 125   // On Windows 7 we don't use delegate_execute and instead use plain vanilla
 126   // ShellExecute to launch Chrome into ASH or desktop.
 127   if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
 128     base::win::ScopedCOMInitializer com_initializer;
 129
 130     base::string16 relaunch_flags(operation.relaunch_flags());
 131     SHELLEXECUTEINFO sei = { sizeof(sei) };
 132     sei.fMask = SEE_MASK_FLAG_LOG_USAGE;
 133     sei.nShow = SW_SHOWNORMAL;
 134     sei.lpFile = operation.shortcut().value().c_str();
 135     sei.lpParameters = relaunch_flags.c_str();
 136
 137     AtlTrace(L"Relaunching Chrome via shortcut [%ls]\n", sei.lpFile);
 138
 139     if (!::ShellExecuteExW(&sei)) {
 140       int error = HRESULT_FROM_WIN32(::GetLastError());
 141       AtlTrace("ShellExecute returned 0x%08X\n", error);
 142       return error;
 143     }
 144   } else {
 145     base::FilePath chrome_exe_path;
 146     bool found_exe = CommandExecuteImpl::FindChromeExe(&chrome_exe_path);
 147     DCHECK(found_exe);
 148     if (found_exe) {
 149       bool launch_ash = base::CommandLine::ForCurrentProcess()->HasSwitch(
 150           switches::kForceImmersive);
 151       if (launch_ash) {
 152         AtlTrace(L"Relaunching Chrome into Windows ASH on Windows 7\n");
 153       } else {
 154         AtlTrace(L"Relaunching Chrome into Desktop From ASH on Windows 7\n");
 155       }
 156       SHELLEXECUTEINFO sei = { sizeof(sei) };
 157       sei.fMask = SEE_MASK_FLAG_LOG_USAGE;
 158       sei.nShow = SW_SHOWNORMAL;
 159       // No point in using the shortcut if we are launching into ASH as any
 160       // additonal command line switches specified in the shortcut will be
 161       // ignored. This is because we don't have a good way to send the command
 162       // line switches from the viewer to the browser process.
 163       sei.lpFile = (launch_ash || operation.shortcut().empty()) ?
 164             chrome_exe_path.value().c_str() :
 165                 operation.shortcut().value().c_str();
 166       sei.lpParameters =
 167           launch_ash ? L"-ServerName:DefaultBrowserServer" : NULL;
 168       if (!::ShellExecuteExW(&sei)) {
 169         int error = HRESULT_FROM_WIN32(::GetLastError());
 170         AtlTrace("ShellExecute returned 0x%08X\n", error);
 171         return error;
 172       }
 173     }
 174   }
 175   return S_OK;
 176 }
 177
 178 extern "C" int WINAPI _tWinMain(HINSTANCE , HINSTANCE, LPTSTR, int nShowCmd) {
 179   scoped_ptr<google_breakpad::ExceptionHandler> breakpad =
 180       delegate_execute::InitializeCrashReporting();
 181
 182   base::AtExitManager exit_manager;
 183   AtlTrace("delegate_execute enter\n");
 184
 185   base::CommandLine::Init(0, NULL);
 186   HRESULT ret_code = E_UNEXPECTED;
 187   DelegateExecuteOperation operation;
 188   if (operation.Init(base::CommandLine::ForCurrentProcess())) {
 189     switch (operation.operation_type()) {
 190       case DelegateExecuteOperation::DELEGATE_EXECUTE:
 191         ret_code = _AtlModule.WinMain(nShowCmd);
 192         break;
 193       case DelegateExecuteOperation::RELAUNCH_CHROME:
 194         ret_code = RelaunchChrome(operation);
 195         break;
 196       default:
 197         NOTREACHED();
 198     }
 199   }
 200   AtlTrace("delegate_execute exit, code = %d\n", ret_code);
 201   return ret_code;
 202 }