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[英]Can I rely on 'sizeof' in order to determine whether I'm using 32-bit OS or 64-bit OS
[英]How can I determine whether a process is 32 or 64 bit?
给定一个 Windows 进程句柄,我如何使用 C++ 代码确定该进程是 32 位还是 64 位?
" 如果您有进程句柄,请使用IsWow64Process()
。
如果IsWow64Process()
报告为true,则该进程在64位操作系统上运行32位。
如果IsWow64Process()
报告错误(或在kernel32.dll
中不存在),则该过程在32位操作系统上运行32位,或在64位操作系统上运行64位。 要知道操作系统本身是32位还是64位,请使用GetNativeSystemInfo()
(如果在kernel32.dll
没有GetNativeSystemInfo()
,则使用GetSystemInfo()
)。
如果你有模块的句柄,那么你可以这样做:
IMAGE_NT_HEADERS * headers = ImageNtHeader(handle);
if ( headers->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 )
{
//module is x86
}
else if ( headers->FileHeader.Machine == IMAGE_FILE_MACHINE_AMD64 )
{
//module is x64
}
我从自己的答案中得到了帮助。
BOOL IsWow64(HANDLE process)
{
BOOL bIsWow64 = FALSE;
typedef BOOL(WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
LPFN_ISWOW64PROCESS fnIsWow64Process;
fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(GetModuleHandle(TEXT("kernel32")), "IsWow64Process");
if (NULL != fnIsWow64Process)
{
if (!fnIsWow64Process(process, &bIsWow64))
{
//handle error
}
}
return bIsWow64;
}
bool IsX86Process(HANDLE process)
{
SYSTEM_INFO systemInfo = { 0 };
GetNativeSystemInfo(&systemInfo);
// x86 environment
if (systemInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL)
return true;
// Check if the process is an x86 process that is running on x64 environment.
// IsWow64 returns true if the process is an x86 process
return IsWow64(process);
}
尝试
#include <Windows.h>
enum class process_architecture
{
nun,
x32,
x64
};
enum class windows_architecture
{
x32,
x64
};
windows_architecture process::get_windows_architecture()
{
#ifdef _WIN64
return windows_architecture::x64;
#else
return windows_architecture::x32;
#endif
}
process_architecture get_process_architecture(DWORD id)
{
BOOL is_wow_64 = FALSE;
HANDLE h_process = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, false, id);
if (!h_process) return process_architecture::nun;
bool result = IsWow64Process(h_process, &is_wow_64);
CloseHandle(h_process);
if (!result) return process_architecture::nun;
if (is_wow_64) return process_architecture::x32;
else if (get_windows_architecture() == windows_architecture::x32) return process_architecture::x32;
else return process_architecture::x64;
}
如果您不想使用 Windows API,请尝试:
int main()
{
const int* pInt = nullptr;
if (sizeof(pInt) == 8)
{
std::cout << "64 bit process";
}
else if(sizeof(pInt) == 4)
{
std::cout << "32 bit process";
}
return 0;
}
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