調用GetSystemTime/SetSystemTime時發生FatalExecutionEngineError

Question

我已經在一個應用程序中編寫了一個小實用程序，它將時間服務器與使用Windows API函數GetSystemTime和SetSystemTime的時間服務器進行同步。這是所有工作正常，但現在我每次打電話Get/SetSystemTime時候，我得到一個錯誤：

FatalExecutionEngineError was detected 
Message: 
The runtime has encountered a fatal error. 
The address of the error was at 0x792bee10, on thread 0x48c. 
The error code is 0xc0000005. This error may be a bug in the CLR 
or in the unsafe or non-verifiable portions of user code. 
Common sources of this bug include user marshaling errors for COM-interop 
or PInvoke, which may corrupt the stack. 

現在，作爲唯一的不安全的代碼是對Win32函數的調用（是，即使是不安全的？）好像它不能在我的代碼 - 這並沒有改變anythig，因爲它實際上正在工作...

任何想法可能會發生什麼嗎？

public class SystemTime 
     { 
      public ushort Year; 
      public ushort Month; 
      public ushort DayOfWeek; 
      public ushort Day; 
      public ushort Hour; 
      public ushort Minute; 
      public ushort Second; 
      public ushort Millisecond; 

      public static implicit operator SystemTime(DateTime dt) 
      { 
       SystemTime rval = new SystemTime(); 
       rval.Year = (ushort)dt.Year; 
       rval.Month = (ushort)dt.Month; 
       rval.Day = (ushort)dt.Day; 
       rval.DayOfWeek = (ushort)dt.DayOfWeek; 
       rval.Hour = (ushort)dt.Hour; 
       rval.Minute = (ushort)dt.Minute; 
       rval.Second = (ushort)dt.Second; 
       rval.Millisecond = (ushort)dt.Millisecond; 
       return rval; 
      } 

      public static implicit operator DateTime(SystemTime st) 
      { 
       return new DateTime(st.Year, st.Month, st.Day, st.Hour, st.Minute, st.Second, st.Millisecond); 
      } 
     }; 

     [DllImport("kernel32.dll", EntryPoint = "GetSystemTime")] 
     public extern static void Win32GetSystemTime(ref SystemTime sysTime); 
     [DllImport("kernel32.dll", EntryPoint = "SetSystemTime")] 
     public extern static bool Win32SetSystemTime(ref SystemTime sysTime); 

編輯：

Win32的調用都是使用由現在非常相同的代碼（未修改）是給我一個AccessViolation ???

Attempted to read or write protected memory. 
This is often an indication that other memory is corrupt. 

Answer 1

因爲您將SYSTEMTIME定義爲一個類，所以當您通過引用傳遞它時，實際上是將指針傳遞給指針，但在非託管端，它期望指向SYSTEMTIME結構的指針。

要麼將​​您的SYSTEMTIME定義更改爲一個結構體，並像現在這樣通過引用來傳遞它。或者將它作爲一個類保留，並將其聲明更改爲：

[DllImport("kernel32.dll")] 
static extern void GetSystemTime([Out] SYSTEMTIME systemTime); 

[DllImport("kernel32.dll")] 
public extern static uint SetSystemTime([In] SYSTEMTIME systemTime); 

個人而言，我會將其更改爲結構體。

Answer 2

基於從MSDN的功能thesignatures，該PInvoke的簽名，你應該使用是：

[StructLayout(LayoutKind.Sequential)] 
public class SYSTEMTIME 
{ 
    public ushort Year; 
    public ushort Month; 
    public ushort DayOfWeek; 
    public ushort Day; 
    public ushort Hour; 
    public ushort Minute; 
    public ushort Second; 
    public ushort Milliseconds; 
} 

[DllImport("kernel32.dll")] 
static extern void GetSystemTime(out SYSTEMTIME systemTime); 

[DllImport("kernel32.dll")] 
public extern static uint SetSystemTime(ref SYSTEMTIME systemTime); 

您是否使用不同的東西？