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/* -*- 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 <stdlib.h>
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/DynamicallyLinkedFunctionPtr.h"
#include "mozilla/Maybe.h"
#include "mozilla/ResultVariant.h"
#include "mozilla/Tuple.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/WindowsVersion.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 _WIN32_WINNT < _WIN32_WINNT_WIN8
typedef struct _FILE_ID_INFO {
ULONGLONG VolumeSerialNumber;
FILE_ID_128 FileId;
} FILE_ID_INFO;
# define FileIdInfo ((FILE_INFO_BY_HANDLE_CLASS)18)
#endif // _WIN32_WINNT < _WIN32_WINNT_WIN8
#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 (IsWin8OrLater()) {
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);
}
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(); }
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 MakeTuple(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;
}
} // namespace mozilla
#endif // mozilla_WinHeaderOnlyUtils_h