| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <windows.h> |
| #include <malloc.h> |
| #include <shellscalingapi.h> |
| #include <tchar.h> |
| |
| #include <string> |
| |
| #include "base/at_exit.h" |
| #include "base/command_line.h" |
| #include "base/files/file_path.h" |
| #include "base/logging.h" |
| #include "base/time/time.h" |
| #include "base/win/windows_version.h" |
| #include "chrome/app/client_util.h" |
| #include "chrome/browser/chrome_process_finder_win.h" |
| #include "chrome/browser/policy/policy_path_parser.h" |
| #include "chrome/common/chrome_paths_internal.h" |
| #include "chrome/common/chrome_switches.h" |
| #include "chrome_elf/chrome_elf_main.h" |
| #include "components/startup_metric_utils/startup_metric_utils.h" |
| #include "content/public/common/result_codes.h" |
| #include "ui/gfx/win/dpi.h" |
| |
| namespace { |
| // List of switches that it's safe to rendezvous early with. Fast start should |
| // not be done if a command line contains a switch not in this set. |
| // Note this is currently stored as a list of two because it's probably faster |
| // to iterate over this small array than building a map for constant time |
| // lookups. |
| const char* const kFastStartSwitches[] = { |
| switches::kProfileDirectory, |
| switches::kShowAppList, |
| }; |
| |
| bool IsFastStartSwitch(const std::string& command_line_switch) { |
| for (size_t i = 0; i < arraysize(kFastStartSwitches); ++i) { |
| if (command_line_switch == kFastStartSwitches[i]) |
| return true; |
| } |
| return false; |
| } |
| |
| bool ContainsNonFastStartFlag(const base::CommandLine& command_line) { |
| const base::CommandLine::SwitchMap& switches = command_line.GetSwitches(); |
| if (switches.size() > arraysize(kFastStartSwitches)) |
| return true; |
| for (base::CommandLine::SwitchMap::const_iterator it = switches.begin(); |
| it != switches.end(); ++it) { |
| if (!IsFastStartSwitch(it->first)) |
| return true; |
| } |
| return false; |
| } |
| |
| bool AttemptFastNotify(const base::CommandLine& command_line) { |
| if (ContainsNonFastStartFlag(command_line)) |
| return false; |
| |
| base::FilePath user_data_dir; |
| if (!chrome::GetDefaultUserDataDirectory(&user_data_dir)) |
| return false; |
| policy::path_parser::CheckUserDataDirPolicy(&user_data_dir); |
| |
| HWND chrome = chrome::FindRunningChromeWindow(user_data_dir); |
| if (!chrome) |
| return false; |
| return chrome::AttemptToNotifyRunningChrome(chrome, true) == |
| chrome::NOTIFY_SUCCESS; |
| } |
| |
| // Win8.1 supports monitor-specific DPI scaling. |
| bool SetProcessDpiAwarenessWrapper(PROCESS_DPI_AWARENESS value) { |
| typedef HRESULT(WINAPI *SetProcessDpiAwarenessPtr)(PROCESS_DPI_AWARENESS); |
| SetProcessDpiAwarenessPtr set_process_dpi_awareness_func = |
| reinterpret_cast<SetProcessDpiAwarenessPtr>( |
| GetProcAddress(GetModuleHandleA("user32.dll"), |
| "SetProcessDpiAwarenessInternal")); |
| if (set_process_dpi_awareness_func) { |
| HRESULT hr = set_process_dpi_awareness_func(value); |
| if (SUCCEEDED(hr)) { |
| VLOG(1) << "SetProcessDpiAwareness succeeded."; |
| return true; |
| } else if (hr == E_ACCESSDENIED) { |
| LOG(ERROR) << "Access denied error from SetProcessDpiAwareness. " |
| "Function called twice, or manifest was used."; |
| } |
| } |
| return false; |
| } |
| |
| // This function works for Windows Vista through Win8. Win8.1 must use |
| // SetProcessDpiAwareness[Wrapper]. |
| BOOL SetProcessDPIAwareWrapper() { |
| typedef BOOL(WINAPI *SetProcessDPIAwarePtr)(VOID); |
| SetProcessDPIAwarePtr set_process_dpi_aware_func = |
| reinterpret_cast<SetProcessDPIAwarePtr>( |
| GetProcAddress(GetModuleHandleA("user32.dll"), |
| "SetProcessDPIAware")); |
| return set_process_dpi_aware_func && |
| set_process_dpi_aware_func(); |
| } |
| |
| void EnableHighDPISupport() { |
| if (!SetProcessDpiAwarenessWrapper(PROCESS_SYSTEM_DPI_AWARE)) { |
| SetProcessDPIAwareWrapper(); |
| } |
| } |
| |
| void SwitchToLFHeap() { |
| // Only needed on XP but harmless on other Windows flavors. |
| auto crt_heap = _get_heap_handle(); |
| ULONG enable_LFH = 2; |
| if (HeapSetInformation(reinterpret_cast<HANDLE>(crt_heap), |
| HeapCompatibilityInformation, |
| &enable_LFH, sizeof(enable_LFH))) { |
| VLOG(1) << "Low fragmentation heap enabled."; |
| } |
| } |
| |
| } // namespace |
| |
| #if !defined(ADDRESS_SANITIZER) |
| int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE prev, wchar_t*, int) { |
| #else |
| // The AddressSanitizer build should be a console program as it prints out stuff |
| // on stderr. |
| int main() { |
| HINSTANCE instance = GetModuleHandle(NULL); |
| #endif |
| SwitchToLFHeap(); |
| |
| startup_metric_utils::RecordExeMainEntryPointTime(base::Time::Now()); |
| |
| // Signal Chrome Elf that Chrome has begun to start. |
| SignalChromeElf(); |
| |
| // Initialize the commandline singleton from the environment. |
| base::CommandLine::Init(0, NULL); |
| // The exit manager is in charge of calling the dtors of singletons. |
| base::AtExitManager exit_manager; |
| |
| // We don't want to set DPI awareness on pre-Win7 because we don't support |
| // DirectWrite there. GDI fonts are kerned very badly, so better to leave |
| // DPI-unaware and at effective 1.0. See also ShouldUseDirectWrite(). |
| if (base::win::GetVersion() >= base::win::VERSION_WIN7) |
| EnableHighDPISupport(); |
| |
| if (AttemptFastNotify(*base::CommandLine::ForCurrentProcess())) |
| return 0; |
| |
| // Load and launch the chrome dll. *Everything* happens inside. |
| VLOG(1) << "About to load main DLL."; |
| MainDllLoader* loader = MakeMainDllLoader(); |
| int rc = loader->Launch(instance); |
| loader->RelaunchChromeBrowserWithNewCommandLineIfNeeded(); |
| delete loader; |
| return rc; |
| } |