信息：
测试：
我正在尝试获取外部进程的句柄列表并将其名称作为字符串返回，以便我可以在之后关闭特定的句柄。因此，我使用Win32API编写此函数，它将检查句柄是否是我要关闭的句柄：`
const int CNST_SYSTEM_HANDLE_INFORMATION = 16;
const uint STATUS_INFO_LENGTH_MISMATCH = 0xc0000004;
public static string getObjectTypeName(Win32API.SYSTEM_HANDLE_INFORMATION shHandle, Process process)
{
IntPtr m_ipProcessHwnd = Win32API.OpenProcess(Win32API.ProcessAccessFlags.All, false, process.Id);
IntPtr ipHandle = IntPtr.Zero;
var objBasic = new Win32API.OBJECT_BASIC_INFORMATION();
IntPtr ipBasic = IntPtr.Zero;
var objObjectType = new Win32API.OBJECT_TYPE_INFORMATION();
IntPtr ipObjectType = IntPtr.Zero;
IntPtr ipObjectName = IntPtr.Zero;
string strObjectTypeName = "";
int nLength = 0;
int nReturn = 0;
IntPtr ipTemp = IntPtr.Zero;
if (!Win32API.DuplicateHandle(m_ipProcessHwnd, shHandle.Handle,
Win32API.GetCurrentProcess(), out ipHandle,
0, false, Win32API.DUPLICATE_SAME_ACCESS))
return null;
ipBasic = Marshal.AllocHGlobal(Marshal.SizeOf(objBasic));
Win32API.NtQueryObject(ipHandle, (int)Win32API.ObjectInformationClass.ObjectBasicInformation,
ipBasic, Marshal.SizeOf(objBasic), ref nLength);
objBasic = (Win32API.OBJECT_BASIC_INFORMATION)Marshal.PtrToStructure(ipBasic, objBasic.GetType());
Marshal.FreeHGlobal(ipBasic);
ipObjectType = Marshal.AllocHGlobal(objBasic.TypeInformationLength);
nLength = objBasic.TypeInformationLength;
while ((uint)(nReturn = Win32API.NtQueryObject(
ipHandle, (int)Win32API.ObjectInformationClass.ObjectTypeInformation, ipObjectType,
nLength, ref nLength)) ==
Win32API.STATUS_INFO_LENGTH_MISMATCH)
{
Marshal.FreeHGlobal(ipObjectType);
ipObjectType = Marshal.AllocHGlobal(nLength);
}
objObjectType = (Win32API.OBJECT_TYPE_INFORMATION)Marshal.PtrToStructure(ipObjectType, objObjectType.GetType());
if (Is64Bits())
{
ipTemp = new IntPtr(Convert.ToInt64(objObjectType.Name.Buffer.ToString(), 10) >> 32);
}
else
{
ipTemp = objObjectType.Name.Buffer;
}
strObjectTypeName = Marshal.PtrToStringUni(ipTemp, objObjectType.Name.Length >> 1);
Marshal.FreeHGlobal(ipObjectType);
Win32API.CloseHandle(ipHandle);
return strObjectTypeName;
}`
但问题是这个代码适用于Win7 64bit，而不是Win10！ - >在Win 10中strObjectTypeName = Marshal.PtrToStringUni();抛出一个AcessViolationException（代码中的最后几行）
System.AccessViolationException尝试读取或写入受保护的内存。这通常表明其他内存已损坏。
我在这里遗漏了一些关于如何在win10中访问非托管内存的问题？
我刚遇到同样的问题。我没有尝试过Win7，但是当你将Win10（x64）上的代码运行为32位（例如设置应用程序的“Prefer 32-bit flag”）时，它应该可以工作。发生异常时，将变量“ipTemp”拖放到Visual Studio的“内存窗口”，如果它只显示问号或错误消息，则表示没有有效指针。据我所知，在这个API使用的64位版本的结构中有（更多）填充字节：OBJECT_TYPE_INFORMATION包含UNICODE_STRING，UNICODE_STRING在64位模式的缓冲区之前有4个填充字节。我的工作方式是这样的：
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct UNICODE_STRING
{
private IntPtr _dummy; // the two ushorts seem to be padded with 4 bytes in 64bit mode only
/// <summary>
/// The length, in bytes, of the string stored in Buffer. If the string is null-terminated, Length does not include the trailing null character.
/// </summary>
public ushort Length
{
get { return (ushort)Marshal.ReadInt16(this, 0); }
}
/// <summary>
/// The length, in bytes, of Buffer.
/// </summary>
public ushort MaximumLength
{
get { return (ushort)Marshal.ReadInt16(this, 2); }
}
public IntPtr Buffer;
}
在我的研究过程中，我发现了很多关于这个主题的问题，基本上有两种样本代码已经在互联网上被复制，我正在考虑创建一个名为WinKernelObjectsDotNet的开源库。
更新：图书馆现在可用here。它支持使用单行代码查找锁定文件或串行端口（COM）的进程。
我建议以这种方式更改UNICODE_STRING结构。
public struct UNICODE_STRING
{
public ushort Length;
public ushort MaximumLength;
[MarshalAs(UnmanagedType.LPWStr)] public string Buffer;
}
所以getObjectTypeName方法将是这样的，并将适用于32/64：
public static string getObjectTypeName(SYSTEM_HANDLE_INFORMATION shHandle, Process process) {
IntPtr ipProcessHwnd = OpenProcess(ProcessAccessFlags.All, false, process.Id);
if (!DuplicateHandle(ipProcessHwnd, shHandle.Handle, GetCurrentProcess(), out IntPtr ipHandle, 0, false, DUPLICATE_SAME_ACCESS)) {
return null;
}
OBJECT_BASIC_INFORMATION objBasicInformation = new OBJECT_BASIC_INFORMATION();
IntPtr ipBasicInformation = Marshal.AllocHGlobal(Marshal.SizeOf(objBasicInformation));
int iBasicInformationLength = 0;
NtQueryObject(ipHandle, (int) ObjectInformationClass.ObjectBasicInformation, ipBasicInformation, Marshal.SizeOf(objBasicInformation), ref iBasicInformationLength);
objBasicInformation = (OBJECT_BASIC_INFORMATION) Marshal.PtrToStructure(ipBasicInformation, typeof(OBJECT_BASIC_INFORMATION));
Marshal.FreeHGlobal(ipBasicInformation);
int iObjectTypeInformationLength = objBasicInformation.TypeInformationLength;
IntPtr ipObjectTypeInformation = Marshal.AllocHGlobal(iObjectTypeInformationLength);
while (Win32API.STATUS_INFO_LENGTH_MISMATCH == (uint) (NtQueryObject(ipHandle, (int) ObjectInformationClass.ObjectTypeInformation, ipObjectTypeInformation, iObjectTypeInformationLength, ref iObjectTypeInformationLength))) {
Marshal.FreeHGlobal(ipObjectTypeInformation);
ipObjectTypeInformation = Marshal.AllocHGlobal(iObjectTypeInformationLength);
}
CloseHandle(ipHandle);
OBJECT_TYPE_INFORMATION objObjectType = (OBJECT_TYPE_INFORMATION)Marshal.PtrToStructure(ipObjectTypeInformation, typeof(OBJECT_TYPE_INFORMATION));
Marshal.FreeHGlobal(ipObjectTypeInformation);
return objObjectType.Name.Buffer;
}