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 "build/intsafe_workaround.h"
   6
   7 #include <atlbase.h>
   8 #include <atlcom.h>
   9 #include <atlctl.h>
  10 #include <initguid.h>
  11 #include <shellapi.h>
  12
  13 #include "base/at_exit.h"
  14 #include "base/command_line.h"
  15 #include "base/file_util.h"
  16 #include "base/memory/scoped_ptr.h"
  17 #include "base/process/kill.h"
  18 #include "base/strings/string16.h"
  19 #include "base/win/scoped_com_initializer.h"
  20 #include "base/win/scoped_comptr.h"
  21 #include "base/win/scoped_handle.h"
  22 #include "breakpad/src/client/windows/handler/exception_handler.h"
  23 #include "chrome/common/chrome_switches.h"
  24 #include "chrome/installer/util/browser_distribution.h"
  25 #include "win8/delegate_execute/command_execute_impl.h"
  26 #include "win8/delegate_execute/crash_server_init.h"
  27 #include "win8/delegate_execute/delegate_execute_operation.h"
  28 #include "win8/delegate_execute/resource.h"
  29
  30 using namespace ATL;
  31
  32 // Usually classes derived from CAtlExeModuleT, or other types of ATL
  33 // COM module classes statically define their CLSID at compile time through
  34 // the use of various macros, and ATL internals takes care of creating the
  35 // class objects and registering them.  However, we need to register the same
  36 // object with different CLSIDs depending on a runtime setting, so we handle
  37 // that logic here, before the main ATL message loop runs.
  38 class DelegateExecuteModule
  39     : public ATL::CAtlExeModuleT< DelegateExecuteModule > {
  40  public :
  41   typedef ATL::CAtlExeModuleT<DelegateExecuteModule> ParentClass;
  42   typedef CComObject<CommandExecuteImpl> ImplType;
  43
  44   DelegateExecuteModule()
  45       : registration_token_(0) {
  46   }
  47
  48   HRESULT PreMessageLoop(int nShowCmd) {
  49     HRESULT hr = S_OK;
  50     string16 clsid_string;
  51     GUID clsid;
  52     BrowserDistribution* dist = BrowserDistribution::GetDistribution();
  53     if (!dist->GetCommandExecuteImplClsid(&clsid_string))
  54       return E_FAIL;
  55     hr = ::CLSIDFromString(clsid_string.c_str(), &clsid);
  56     if (FAILED(hr))
  57       return hr;
  58
  59     // We use the same class creation logic as ATL itself.  See
  60     // _ATL_OBJMAP_ENTRY::RegisterClassObject() in atlbase.h
  61     hr = ImplType::_ClassFactoryCreatorClass::CreateInstance(
  62         ImplType::_CreatorClass::CreateInstance, IID_IUnknown,
  63         instance_.ReceiveVoid());
  64     if (FAILED(hr))
  65       return hr;
  66     hr = ::CoRegisterClassObject(clsid, instance_, CLSCTX_LOCAL_SERVER,
  67         REGCLS_MULTIPLEUSE | REGCLS_SUSPENDED, &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 [%s]\n",
  97            operation.mutex().c_str(), operation.relaunch_flags());
  98   ScopedHandle mutex(OpenMutexW(SYNCHRONIZE, FALSE, operation.mutex().c_str()));
  99   if (mutex.IsValid()) {
 100     const int kWaitSeconds = 5;
 101     DWORD result = ::WaitForSingleObject(mutex, 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       DWORD pid = operation.GetParentPid();
 112       AtlTrace("%ds timeout. Killing Chrome %d\n", kWaitSeconds, pid);
 113       base::KillProcessById(pid, 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   base::win::ScopedCOMInitializer com_initializer;
 123
 124   string16 relaunch_flags(operation.relaunch_flags());
 125   SHELLEXECUTEINFO sei = { sizeof(sei) };
 126   sei.fMask = SEE_MASK_FLAG_LOG_USAGE;
 127   sei.nShow = SW_SHOWNORMAL;
 128   sei.lpFile = operation.shortcut().value().c_str();
 129   sei.lpParameters = relaunch_flags.c_str();
 130
 131   AtlTrace(L"Relaunching Chrome via shortcut [%ls]\n", sei.lpFile);
 132
 133   if (!::ShellExecuteExW(&sei)) {
 134     int error = HRESULT_FROM_WIN32(::GetLastError());
 135     AtlTrace("ShellExecute returned 0x%08X\n", error);
 136     return error;
 137   }
 138   return S_OK;
 139 }
 140
 141 extern "C" int WINAPI _tWinMain(HINSTANCE , HINSTANCE, LPTSTR, int nShowCmd) {
 142   scoped_ptr<google_breakpad::ExceptionHandler> breakpad =
 143       delegate_execute::InitializeCrashReporting();
 144
 145   base::AtExitManager exit_manager;
 146   AtlTrace("delegate_execute enter\n");
 147
 148   CommandLine::Init(0, NULL);
 149   HRESULT ret_code = E_UNEXPECTED;
 150   DelegateExecuteOperation operation;
 151   if (operation.Init(CommandLine::ForCurrentProcess())) {
 152     switch (operation.operation_type()) {
 153       case DelegateExecuteOperation::DELEGATE_EXECUTE:
 154         ret_code = _AtlModule.WinMain(nShowCmd);
 155         break;
 156       case DelegateExecuteOperation::RELAUNCH_CHROME:
 157         ret_code = RelaunchChrome(operation);
 158         break;
 159       default:
 160         NOTREACHED();
 161     }
 162   }
 163   AtlTrace("delegate_execute exit, code = %d\n", ret_code);
 164   return ret_code;
 165 }