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Diffstat (limited to 'widget/windows/WinHeaderOnlyUtils.h')
| -rw-r--r-- | widget/windows/WinHeaderOnlyUtils.h | 820 |
1 files changed, 820 insertions, 0 deletions
diff --git a/widget/windows/WinHeaderOnlyUtils.h b/widget/windows/WinHeaderOnlyUtils.h new file mode 100644 index 0000000000..15861cc73b --- /dev/null +++ b/widget/windows/WinHeaderOnlyUtils.h @@ -0,0 +1,820 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_WinHeaderOnlyUtils_h +#define mozilla_WinHeaderOnlyUtils_h + +#include <windows.h> +#include <winerror.h> +#include <winnt.h> +#include <winternl.h> +#include <objbase.h> +#include <shlwapi.h> +#undef ParseURL +#include <stdlib.h> +#include <tuple> + +#include "mozilla/Assertions.h" +#include "mozilla/Attributes.h" +#include "mozilla/DynamicallyLinkedFunctionPtr.h" +#include "mozilla/Maybe.h" +#include "mozilla/ResultVariant.h" +#include "mozilla/UniquePtr.h" +#include "nsWindowsHelpers.h" + +#if defined(MOZILLA_INTERNAL_API) +# include "nsIFile.h" +# include "nsString.h" +#endif // defined(MOZILLA_INTERNAL_API) + +/** + * This header is intended for self-contained, header-only, utility code for + * Win32. It may be used outside of xul.dll, in places such as firefox.exe or + * mozglue.dll. If your code creates dependencies on Mozilla libraries, you + * should put it elsewhere. + */ + +#if !defined(STATUS_SUCCESS) +# define STATUS_SUCCESS ((NTSTATUS)0x00000000L) +#endif // !defined(STATUS_SUCCESS) + +// Our data indicates a few users of Win7 x86 hit failure to load urlmon.dll +// for unknown reasons. Since we don't always require urlmon.dll on Win7, +// we delay-load it, which causes a crash if loading urlmon.dll fails. This +// macro is to safely load and call urlmon's API graciously without crash. +#if defined(_X86_) +# define SAFECALL_URLMON_FUNC(FuncName, ...) \ + do { \ + static const mozilla::StaticDynamicallyLinkedFunctionPtr< \ + decltype(&::FuncName)> \ + func(L"urlmon.dll", #FuncName); \ + hr = \ + func ? func(__VA_ARGS__) : HRESULT_FROM_WIN32(ERROR_PROC_NOT_FOUND); \ + } while (0) +#else +# define SAFECALL_URLMON_FUNC(FuncName, ...) hr = ::FuncName(__VA_ARGS__) +#endif + +namespace mozilla { + +class WindowsError final { + private: + // HRESULT and NTSTATUS are both typedefs of LONG, so we cannot use + // overloading to properly differentiate between the two. Instead we'll use + // static functions to convert the various error types to HRESULTs before + // instantiating. + explicit constexpr WindowsError(HRESULT aHResult) : mHResult(aHResult) {} + + public: + using UniqueString = UniquePtr<WCHAR[], LocalFreeDeleter>; + + static constexpr WindowsError FromNtStatus(NTSTATUS aNtStatus) { + if (aNtStatus == STATUS_SUCCESS) { + // Special case: we don't want to set FACILITY_NT_BIT + // (HRESULT_FROM_NT does not handle this case, unlike HRESULT_FROM_WIN32) + return WindowsError(S_OK); + } + + return WindowsError(HRESULT_FROM_NT(aNtStatus)); + } + + static constexpr WindowsError FromHResult(HRESULT aHResult) { + return WindowsError(aHResult); + } + + static constexpr WindowsError FromWin32Error(DWORD aWin32Err) { + return WindowsError(HRESULT_FROM_WIN32(aWin32Err)); + } + + static WindowsError FromLastError() { + return FromWin32Error(::GetLastError()); + } + + static WindowsError CreateSuccess() { return WindowsError(S_OK); } + + static WindowsError CreateGeneric() { + return FromWin32Error(ERROR_UNIDENTIFIED_ERROR); + } + + bool IsSuccess() const { return SUCCEEDED(mHResult); } + + bool IsFailure() const { return FAILED(mHResult); } + + bool IsAvailableAsWin32Error() const { + return IsAvailableAsNtStatus() || + HRESULT_FACILITY(mHResult) == FACILITY_WIN32; + } + + bool IsAvailableAsNtStatus() const { + return mHResult == S_OK || (mHResult & FACILITY_NT_BIT); + } + + bool IsAvailableAsHResult() const { return true; } + + UniqueString AsString() const { + LPWSTR rawMsgBuf = nullptr; + constexpr DWORD flags = FORMAT_MESSAGE_ALLOCATE_BUFFER | + FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_IGNORE_INSERTS; + DWORD result = + ::FormatMessageW(flags, nullptr, mHResult, 0, + reinterpret_cast<LPWSTR>(&rawMsgBuf), 0, nullptr); + if (!result) { + return nullptr; + } + + return UniqueString(rawMsgBuf); + } + + HRESULT AsHResult() const { return mHResult; } + + // Not all HRESULTs are convertible to Win32 Errors, so we use Maybe + Maybe<DWORD> AsWin32Error() const { + if (mHResult == S_OK) { + return Some(static_cast<DWORD>(ERROR_SUCCESS)); + } + + if (HRESULT_FACILITY(mHResult) == FACILITY_WIN32) { + // This is the inverse of HRESULT_FROM_WIN32 + return Some(static_cast<DWORD>(HRESULT_CODE(mHResult))); + } + + // The NTSTATUS facility is a special case and thus does not utilize the + // HRESULT_FACILITY and HRESULT_CODE macros. + if (mHResult & FACILITY_NT_BIT) { + return Some(NtStatusToWin32Error( + static_cast<NTSTATUS>(mHResult & ~FACILITY_NT_BIT))); + } + + return Nothing(); + } + + // Not all HRESULTs are convertible to NTSTATUS, so we use Maybe + Maybe<NTSTATUS> AsNtStatus() const { + if (mHResult == S_OK) { + return Some(STATUS_SUCCESS); + } + + // The NTSTATUS facility is a special case and thus does not utilize the + // HRESULT_FACILITY and HRESULT_CODE macros. + if (mHResult & FACILITY_NT_BIT) { + return Some(static_cast<NTSTATUS>(mHResult & ~FACILITY_NT_BIT)); + } + + return Nothing(); + } + + constexpr bool operator==(const WindowsError& aOther) const { + return mHResult == aOther.mHResult; + } + + constexpr bool operator!=(const WindowsError& aOther) const { + return mHResult != aOther.mHResult; + } + + static DWORD NtStatusToWin32Error(NTSTATUS aNtStatus) { + static const StaticDynamicallyLinkedFunctionPtr< + decltype(&RtlNtStatusToDosError)> + pRtlNtStatusToDosError(L"ntdll.dll", "RtlNtStatusToDosError"); + + MOZ_ASSERT(!!pRtlNtStatusToDosError); + if (!pRtlNtStatusToDosError) { + return ERROR_UNIDENTIFIED_ERROR; + } + + return pRtlNtStatusToDosError(aNtStatus); + } + + private: + // We store the error code as an HRESULT because they can encode both Win32 + // error codes and NTSTATUS codes. + HRESULT mHResult; +}; + +namespace detail { +template <> +struct UnusedZero<WindowsError> { + using StorageType = WindowsError; + + static constexpr bool value = true; + static constexpr StorageType nullValue = WindowsError::FromHResult(S_OK); + + static constexpr void AssertValid(StorageType aValue) {} + static constexpr const WindowsError& Inspect(const StorageType& aValue) { + return aValue; + } + static constexpr WindowsError Unwrap(StorageType aValue) { return aValue; } + static constexpr StorageType Store(WindowsError aValue) { return aValue; } +}; +} // namespace detail + +enum DetourResultCode : uint32_t { + RESULT_OK = 0, + INTERCEPTOR_MOD_NULL, + INTERCEPTOR_MOD_INACCESSIBLE, + INTERCEPTOR_PROC_NULL, + INTERCEPTOR_PROC_INACCESSIBLE, + DETOUR_PATCHER_RESERVE_FOR_MODULE_PE_ERROR, + DETOUR_PATCHER_RESERVE_FOR_MODULE_TEXT_ERROR, + DETOUR_PATCHER_RESERVE_FOR_MODULE_RESERVE_ERROR, + DETOUR_PATCHER_DO_RESERVE_ERROR, + DETOUR_PATCHER_NEXT_TRAMPOLINE_ERROR, + DETOUR_PATCHER_INVALID_TRAMPOLINE, + DETOUR_PATCHER_WRITE_POINTER_ERROR, + DETOUR_PATCHER_CREATE_TRAMPOLINE_ERROR, + FUNCHOOKCROSSPROCESS_COPYSTUB_ERROR, + MMPOLICY_RESERVE_INVALIDARG, + MMPOLICY_RESERVE_ZERO_RESERVATIONSIZE, + MMPOLICY_RESERVE_CREATEFILEMAPPING, + MMPOLICY_RESERVE_MAPVIEWOFFILE, + MMPOLICY_RESERVE_NOBOUND_RESERVE_ERROR, + MMPOLICY_RESERVE_FINDREGION_INVALIDLEN, + MMPOLICY_RESERVE_FINDREGION_INVALIDRANGE, + MMPOLICY_RESERVE_FINDREGION_VIRTUALQUERY_ERROR, + MMPOLICY_RESERVE_FINDREGION_NO_FREE_REGION, + MMPOLICY_RESERVE_FINAL_RESERVE_ERROR, +}; + +#if defined(NIGHTLY_BUILD) +struct DetourError { + // We have a 16-bytes buffer, but only minimum bytes to detour per + // architecture are copied. See CreateTrampoline in PatcherDetour.h. + DetourResultCode mErrorCode; + uint8_t mOrigBytes[16]; + explicit DetourError(DetourResultCode aError) + : mErrorCode(aError), mOrigBytes{} {} + DetourError(DetourResultCode aError, DWORD aWin32Error) + : mErrorCode(aError), mOrigBytes{} { + static_assert(sizeof(mOrigBytes) >= sizeof(aWin32Error), + "Can't fit a DWORD in mOrigBytes"); + *reinterpret_cast<DWORD*>(mOrigBytes) = aWin32Error; + } + operator WindowsError() const { + return WindowsError::FromHResult(mErrorCode); + } +}; +#endif // defined(NIGHTLY_BUILD) + +template <typename T> +using WindowsErrorResult = Result<T, WindowsError>; + +struct LauncherError { + LauncherError(const char* aFile, int aLine, WindowsError aWin32Error) + : mFile(aFile), mLine(aLine), mError(aWin32Error) {} + +#if defined(NIGHTLY_BUILD) + LauncherError(const char* aFile, int aLine, + const Maybe<DetourError>& aDetourError) + : mFile(aFile), + mLine(aLine), + mError(aDetourError.isSome() ? aDetourError.value() + : WindowsError::CreateGeneric()), + mDetourError(aDetourError) {} +#endif // defined(NIGHTLY_BUILD) + + const char* mFile; + int mLine; + WindowsError mError; +#if defined(NIGHTLY_BUILD) + Maybe<DetourError> mDetourError; +#endif // defined(NIGHTLY_BUILD) + + bool operator==(const LauncherError& aOther) const { + return mError == aOther.mError; + } + + bool operator!=(const LauncherError& aOther) const { + return mError != aOther.mError; + } + + bool operator==(const WindowsError& aOther) const { return mError == aOther; } + + bool operator!=(const WindowsError& aOther) const { return mError != aOther; } +}; + +#if defined(MOZ_USE_LAUNCHER_ERROR) + +template <typename T> +using LauncherResult = Result<T, LauncherError>; + +template <typename T> +using LauncherResultWithLineInfo = LauncherResult<T>; + +using WindowsErrorType = LauncherError; + +#else + +template <typename T> +using LauncherResult = WindowsErrorResult<T>; + +template <typename T> +using LauncherResultWithLineInfo = Result<T, LauncherError>; + +using WindowsErrorType = WindowsError; + +#endif // defined(MOZ_USE_LAUNCHER_ERROR) + +using LauncherVoidResult = LauncherResult<Ok>; + +using LauncherVoidResultWithLineInfo = LauncherResultWithLineInfo<Ok>; + +#if defined(MOZ_USE_LAUNCHER_ERROR) + +# define LAUNCHER_ERROR_GENERIC() \ + ::mozilla::Err(::mozilla::LauncherError( \ + __FILE__, __LINE__, ::mozilla::WindowsError::CreateGeneric())) + +# if defined(NIGHTLY_BUILD) +# define LAUNCHER_ERROR_FROM_DETOUR_ERROR(err) \ + ::mozilla::Err(::mozilla::LauncherError(__FILE__, __LINE__, err)) +# else +# define LAUNCHER_ERROR_FROM_DETOUR_ERROR(err) LAUNCHER_ERROR_GENERIC() +# endif // defined(NIGHTLY_BUILD) + +# define LAUNCHER_ERROR_FROM_WIN32(err) \ + ::mozilla::Err(::mozilla::LauncherError( \ + __FILE__, __LINE__, ::mozilla::WindowsError::FromWin32Error(err))) + +# define LAUNCHER_ERROR_FROM_LAST() \ + ::mozilla::Err(::mozilla::LauncherError( \ + __FILE__, __LINE__, ::mozilla::WindowsError::FromLastError())) + +# define LAUNCHER_ERROR_FROM_NTSTATUS(ntstatus) \ + ::mozilla::Err(::mozilla::LauncherError( \ + __FILE__, __LINE__, ::mozilla::WindowsError::FromNtStatus(ntstatus))) + +# define LAUNCHER_ERROR_FROM_HRESULT(hresult) \ + ::mozilla::Err(::mozilla::LauncherError( \ + __FILE__, __LINE__, ::mozilla::WindowsError::FromHResult(hresult))) + +// This macro wraps the supplied WindowsError with a LauncherError +# define LAUNCHER_ERROR_FROM_MOZ_WINDOWS_ERROR(err) \ + ::mozilla::Err(::mozilla::LauncherError(__FILE__, __LINE__, err)) + +#else + +# define LAUNCHER_ERROR_GENERIC() \ + ::mozilla::Err(::mozilla::WindowsError::CreateGeneric()) + +# define LAUNCHER_ERROR_FROM_DETOUR_ERROR(err) LAUNCHER_ERROR_GENERIC() + +# define LAUNCHER_ERROR_FROM_WIN32(err) \ + ::mozilla::Err(::mozilla::WindowsError::FromWin32Error(err)) + +# define LAUNCHER_ERROR_FROM_LAST() \ + ::mozilla::Err(::mozilla::WindowsError::FromLastError()) + +# define LAUNCHER_ERROR_FROM_NTSTATUS(ntstatus) \ + ::mozilla::Err(::mozilla::WindowsError::FromNtStatus(ntstatus)) + +# define LAUNCHER_ERROR_FROM_HRESULT(hresult) \ + ::mozilla::Err(::mozilla::WindowsError::FromHResult(hresult)) + +# define LAUNCHER_ERROR_FROM_MOZ_WINDOWS_ERROR(err) ::mozilla::Err(err) + +#endif // defined(MOZ_USE_LAUNCHER_ERROR) + +// How long to wait for a created process to become available for input, +// to prevent that process's windows being forced to the background. +// This is used across update, restart, and the launcher. +const DWORD kWaitForInputIdleTimeoutMS = 10 * 1000; + +/** + * Wait for a child GUI process to become "idle." Idle means that the process + * has created its message queue and has begun waiting for user input. + * + * Note that this must only be used when the child process is going to display + * GUI! Otherwise you're going to be waiting for a very long time ;-) + * + * @return true if we successfully waited for input idle; + * false if we timed out or failed to wait. + */ +inline bool WaitForInputIdle(HANDLE aProcess, + DWORD aTimeoutMs = kWaitForInputIdleTimeoutMS) { + const DWORD kSleepTimeMs = 10; + const DWORD waitStart = aTimeoutMs == INFINITE ? 0 : ::GetTickCount(); + DWORD elapsed = 0; + + while (true) { + if (aTimeoutMs != INFINITE) { + elapsed = ::GetTickCount() - waitStart; + } + + if (elapsed >= aTimeoutMs) { + return false; + } + + // ::WaitForInputIdle() doesn't always set the last-error code on failure + ::SetLastError(ERROR_SUCCESS); + + DWORD waitResult = ::WaitForInputIdle(aProcess, aTimeoutMs - elapsed); + if (!waitResult) { + return true; + } + + if (waitResult == WAIT_FAILED && + ::GetLastError() == ERROR_NOT_GUI_PROCESS) { + ::Sleep(kSleepTimeMs); + continue; + } + + return false; + } +} + +enum class PathType { + eNtPath, + eDosPath, +}; + +class FileUniqueId final { + public: + explicit FileUniqueId(const wchar_t* aPath, PathType aPathType) + : mId(FILE_ID_INFO()) { + if (!aPath) { + mId = LAUNCHER_ERROR_FROM_HRESULT(E_INVALIDARG); + return; + } + + nsAutoHandle file; + + switch (aPathType) { + default: + mId = LAUNCHER_ERROR_FROM_HRESULT(E_INVALIDARG); + MOZ_ASSERT_UNREACHABLE("Unhandled PathType"); + return; + + case PathType::eNtPath: { + UNICODE_STRING unicodeString; + ::RtlInitUnicodeString(&unicodeString, aPath); + OBJECT_ATTRIBUTES objectAttributes; + InitializeObjectAttributes(&objectAttributes, &unicodeString, + OBJ_CASE_INSENSITIVE, nullptr, nullptr); + IO_STATUS_BLOCK ioStatus = {}; + HANDLE ntHandle; + NTSTATUS status = ::NtOpenFile( + &ntHandle, SYNCHRONIZE | FILE_READ_ATTRIBUTES, &objectAttributes, + &ioStatus, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + FILE_SYNCHRONOUS_IO_NONALERT | FILE_OPEN_FOR_BACKUP_INTENT); + // We don't need to check |ntHandle| for INVALID_HANDLE_VALUE here, + // as that value is set by the Win32 layer. + if (!NT_SUCCESS(status)) { + mId = LAUNCHER_ERROR_FROM_NTSTATUS(status); + return; + } + + file.own(ntHandle); + break; + } + + case PathType::eDosPath: { + file.own(::CreateFileW( + aPath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr)); + if (file == INVALID_HANDLE_VALUE) { + mId = LAUNCHER_ERROR_FROM_LAST(); + return; + } + + break; + } + } + + GetId(file); + } + + explicit FileUniqueId(const nsAutoHandle& aFile) : mId(FILE_ID_INFO()) { + GetId(aFile); + } + + ~FileUniqueId() = default; + + bool IsError() const { return mId.isErr(); } + + const WindowsErrorType& GetError() const { return mId.inspectErr(); } + + FileUniqueId(FileUniqueId&& aOther) = default; + FileUniqueId& operator=(FileUniqueId&& aOther) = delete; + + bool operator==(const FileUniqueId& aOther) const { + return mId.isOk() && aOther.mId.isOk() && + !memcmp(&mId.inspect(), &aOther.mId.inspect(), sizeof(FILE_ID_INFO)); + } + + bool operator!=(const FileUniqueId& aOther) const { + return !((*this) == aOther); + } + + private: + void GetId(const nsAutoHandle& aFile) { + FILE_ID_INFO fileIdInfo = {}; + if (::GetFileInformationByHandleEx(aFile.get(), FileIdInfo, &fileIdInfo, + sizeof(fileIdInfo))) { + mId = fileIdInfo; + return; + } + // Only NTFS and ReFS support FileIdInfo. So we have to fallback if + // GetFileInformationByHandleEx failed. + + BY_HANDLE_FILE_INFORMATION info = {}; + if (!::GetFileInformationByHandle(aFile.get(), &info)) { + mId = LAUNCHER_ERROR_FROM_LAST(); + return; + } + + fileIdInfo.VolumeSerialNumber = info.dwVolumeSerialNumber; + memcpy(&fileIdInfo.FileId.Identifier[0], &info.nFileIndexLow, + sizeof(DWORD)); + memcpy(&fileIdInfo.FileId.Identifier[sizeof(DWORD)], &info.nFileIndexHigh, + sizeof(DWORD)); + mId = fileIdInfo; + } + + private: + LauncherResult<FILE_ID_INFO> mId; +}; + +class MOZ_RAII AutoVirtualProtect final { + public: + AutoVirtualProtect(void* aAddress, size_t aLength, DWORD aProtFlags, + HANDLE aTargetProcess = ::GetCurrentProcess()) + : mAddress(aAddress), + mLength(aLength), + mTargetProcess(aTargetProcess), + mPrevProt(0), + mError(WindowsError::CreateSuccess()) { + if (!::VirtualProtectEx(aTargetProcess, aAddress, aLength, aProtFlags, + &mPrevProt)) { + mError = WindowsError::FromLastError(); + } + } + + ~AutoVirtualProtect() { + if (mError.IsFailure()) { + return; + } + + ::VirtualProtectEx(mTargetProcess, mAddress, mLength, mPrevProt, + &mPrevProt); + } + + explicit operator bool() const { return mError.IsSuccess(); } + + WindowsError GetError() const { return mError; } + + DWORD PrevProt() const { return mPrevProt; } + + AutoVirtualProtect(const AutoVirtualProtect&) = delete; + AutoVirtualProtect(AutoVirtualProtect&&) = delete; + AutoVirtualProtect& operator=(const AutoVirtualProtect&) = delete; + AutoVirtualProtect& operator=(AutoVirtualProtect&&) = delete; + + private: + void* mAddress; + size_t mLength; + HANDLE mTargetProcess; + DWORD mPrevProt; + WindowsError mError; +}; + +inline UniquePtr<wchar_t[]> GetFullModulePath(HMODULE aModule) { + DWORD bufLen = MAX_PATH; + mozilla::UniquePtr<wchar_t[]> buf; + DWORD retLen; + + while (true) { + buf = mozilla::MakeUnique<wchar_t[]>(bufLen); + retLen = ::GetModuleFileNameW(aModule, buf.get(), bufLen); + if (!retLen) { + return nullptr; + } + + if (retLen == bufLen && ::GetLastError() == ERROR_INSUFFICIENT_BUFFER) { + bufLen *= 2; + continue; + } + + break; + } + + // Upon success, retLen *excludes* the null character + ++retLen; + + // Since we're likely to have a bunch of unused space in buf, let's + // reallocate a string to the actual size of the file name. + auto result = mozilla::MakeUnique<wchar_t[]>(retLen); + if (wcscpy_s(result.get(), retLen, buf.get())) { + return nullptr; + } + + return result; +} + +inline UniquePtr<wchar_t[]> GetFullBinaryPath() { + return GetFullModulePath(nullptr); +} + +// Generates the install directory without a trailing path separator. +inline bool GetInstallDirectory(UniquePtr<wchar_t[]>& installPath) { + installPath = GetFullBinaryPath(); + // It's not safe to use PathRemoveFileSpecW with strings longer than MAX_PATH + // (including null terminator). + if (wcslen(installPath.get()) >= MAX_PATH) { + return false; + } + ::PathRemoveFileSpecW(installPath.get()); + return true; +} + +class ModuleVersion final { + public: + constexpr ModuleVersion() : mVersion(0ULL) {} + + explicit ModuleVersion(const VS_FIXEDFILEINFO& aFixedInfo) + : mVersion((static_cast<uint64_t>(aFixedInfo.dwFileVersionMS) << 32) | + static_cast<uint64_t>(aFixedInfo.dwFileVersionLS)) {} + + explicit ModuleVersion(const uint64_t aVersion) : mVersion(aVersion) {} + + ModuleVersion(const ModuleVersion& aOther) : mVersion(aOther.mVersion) {} + + uint64_t AsInteger() const { return mVersion; } + + operator uint64_t() const { return AsInteger(); } + + std::tuple<uint16_t, uint16_t, uint16_t, uint16_t> AsTuple() const { + uint16_t major = static_cast<uint16_t>((mVersion >> 48) & 0xFFFFU); + uint16_t minor = static_cast<uint16_t>((mVersion >> 32) & 0xFFFFU); + uint16_t patch = static_cast<uint16_t>((mVersion >> 16) & 0xFFFFU); + uint16_t build = static_cast<uint16_t>(mVersion & 0xFFFFU); + + return {major, minor, patch, build}; + } + + explicit operator bool() const { return !!mVersion; } + + bool operator<(const ModuleVersion& aOther) const { + return mVersion < aOther.mVersion; + } + + bool operator<(const uint64_t& aOther) const { return mVersion < aOther; } + + ModuleVersion& operator=(const uint64_t aIntVersion) { + mVersion = aIntVersion; + return *this; + } + + private: + uint64_t mVersion; +}; + +inline LauncherResult<ModuleVersion> GetModuleVersion( + const wchar_t* aModuleFullPath) { + DWORD verInfoLen = ::GetFileVersionInfoSizeW(aModuleFullPath, nullptr); + if (!verInfoLen) { + return LAUNCHER_ERROR_FROM_LAST(); + } + + auto verInfoBuf = MakeUnique<BYTE[]>(verInfoLen); + if (!::GetFileVersionInfoW(aModuleFullPath, 0, verInfoLen, + verInfoBuf.get())) { + return LAUNCHER_ERROR_FROM_LAST(); + } + + UINT fixedInfoLen; + VS_FIXEDFILEINFO* fixedInfo = nullptr; + if (!::VerQueryValueW(verInfoBuf.get(), L"\\", + reinterpret_cast<LPVOID*>(&fixedInfo), &fixedInfoLen)) { + // VerQueryValue may fail if the resource does not exist. This is not an + // error; we'll return 0 in this case. + return ModuleVersion(0ULL); + } + + return ModuleVersion(*fixedInfo); +} + +inline LauncherResult<ModuleVersion> GetModuleVersion(HMODULE aModule) { + UniquePtr<wchar_t[]> fullPath(GetFullModulePath(aModule)); + if (!fullPath) { + return LAUNCHER_ERROR_GENERIC(); + } + + return GetModuleVersion(fullPath.get()); +} + +#if defined(MOZILLA_INTERNAL_API) +inline LauncherResult<ModuleVersion> GetModuleVersion(nsIFile* aFile) { + if (!aFile) { + return LAUNCHER_ERROR_FROM_HRESULT(E_INVALIDARG); + } + + nsAutoString fullPath; + nsresult rv = aFile->GetPath(fullPath); + if (NS_FAILED(rv)) { + return LAUNCHER_ERROR_GENERIC(); + } + + return GetModuleVersion(fullPath.get()); +} +#endif // defined(MOZILLA_INTERNAL_API) + +struct CoTaskMemFreeDeleter { + void operator()(void* aPtr) { ::CoTaskMemFree(aPtr); } +}; + +inline LauncherResult<TOKEN_ELEVATION_TYPE> GetElevationType( + const nsAutoHandle& aToken) { + DWORD retLen; + TOKEN_ELEVATION_TYPE elevationType; + if (!::GetTokenInformation(aToken.get(), TokenElevationType, &elevationType, + sizeof(elevationType), &retLen)) { + return LAUNCHER_ERROR_FROM_LAST(); + } + + return elevationType; +} + +inline bool HasPackageIdentity() { + HMODULE kernel32Dll = ::GetModuleHandleW(L"kernel32"); + if (!kernel32Dll) { + return false; + } + + typedef LONG(WINAPI * GetCurrentPackageIdProc)(UINT32*, BYTE*); + GetCurrentPackageIdProc pGetCurrentPackageId = + (GetCurrentPackageIdProc)::GetProcAddress(kernel32Dll, + "GetCurrentPackageId"); + + // If there was any package identity to retrieve, we get + // ERROR_INSUFFICIENT_BUFFER. If there had been no package identity it + // would instead return APPMODEL_ERROR_NO_PACKAGE. + UINT32 packageNameSize = 0; + return pGetCurrentPackageId && + (pGetCurrentPackageId(&packageNameSize, nullptr) == + ERROR_INSUFFICIENT_BUFFER); +} + +inline UniquePtr<wchar_t[]> GetPackageFamilyName() { + HMODULE kernel32Dll = ::GetModuleHandleW(L"kernel32"); + if (!kernel32Dll) { + return nullptr; + } + + typedef LONG(WINAPI * GetCurrentPackageFamilyNameProc)(UINT32*, PWSTR); + GetCurrentPackageFamilyNameProc pGetCurrentPackageFamilyName = + (GetCurrentPackageFamilyNameProc)::GetProcAddress( + kernel32Dll, "GetCurrentPackageFamilyName"); + if (!pGetCurrentPackageFamilyName) { + return nullptr; + } + + UINT32 packageNameSize = 0; + if (pGetCurrentPackageFamilyName(&packageNameSize, nullptr) != + ERROR_INSUFFICIENT_BUFFER) { + return nullptr; + } + + UniquePtr<wchar_t[]> packageIdentity = MakeUnique<wchar_t[]>(packageNameSize); + if (pGetCurrentPackageFamilyName(&packageNameSize, packageIdentity.get()) != + ERROR_SUCCESS) { + return nullptr; + } + + return packageIdentity; +} + +// This implementation is equivalent to PathGetDriveNumber[AW]. +// We define our own version because using PathGetDriveNumber +// delay-loads shlwapi.dll, which may fail when the process is +// sandboxed. +template <typename T> +int MozPathGetDriveNumber(const T* aPath) { + const auto ToDriveNumber = [](const T* aPath) -> int { + if (*aPath == '\0' || *(aPath + 1) != ':') { + return -1; + } + + T c = *aPath; + return (c >= 'A' && c <= 'Z') ? c - 'A' + : (c >= 'a' && c <= 'z') ? c - 'a' + : -1; + }; + + if (!aPath) { + return -1; + } + + if (*aPath == '\\' && *(aPath + 1) == '\\' && *(aPath + 2) == '?' && + *(aPath + 3) == '\\') { + return ToDriveNumber(aPath + 4); + } + + return ToDriveNumber(aPath); +} + +} // namespace mozilla + +#endif // mozilla_WinHeaderOnlyUtils_h |