StubHelpers.cs

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using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
 
namespace System.StubHelpers;
 
internal static class StubHelpers
{
    [ThreadStatic]
    private static Exception s_pendingExceptionObject;
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void InitDeclaringType(IntPtr pMD);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr GetNDirectTarget(IntPtr pMD);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr GetDelegateTarget(Delegate pThis, ref IntPtr pStubArg);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void ClearLastError();
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void SetLastError();
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void ThrowInteropParamException(int resID, int paramIdx);
 
    internal static IntPtr AddToCleanupList(ref CleanupWorkListElement pCleanupWorkList, SafeHandle handle)
    {
        SafeHandleCleanupWorkListElement safeHandleCleanupWorkListElement = new SafeHandleCleanupWorkListElement(handle);
        CleanupWorkListElement.AddToCleanupList(ref pCleanupWorkList, safeHandleCleanupWorkListElement);
        return safeHandleCleanupWorkListElement.AddRef();
    }
 
    internal static void KeepAliveViaCleanupList(ref CleanupWorkListElement pCleanupWorkList, object obj)
    {
        KeepAliveCleanupWorkListElement newElement = new KeepAliveCleanupWorkListElement(obj);
        CleanupWorkListElement.AddToCleanupList(ref pCleanupWorkList, newElement);
    }
 
    internal static void DestroyCleanupList(ref CleanupWorkListElement pCleanupWorkList)
    {
        if (pCleanupWorkList != null)
        {
            pCleanupWorkList.Destroy();
            pCleanupWorkList = null;
        }
    }
 
    internal static Exception GetHRExceptionObject(int hr)
    {
        Exception ex = InternalGetHRExceptionObject(hr);
        ex.InternalPreserveStackTrace();
        return ex;
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern Exception InternalGetHRExceptionObject(int hr);
 
    internal static Exception GetCOMHRExceptionObject(int hr, IntPtr pCPCMD, object pThis)
    {
        Exception ex = InternalGetCOMHRExceptionObject(hr, pCPCMD, pThis);
        ex.InternalPreserveStackTrace();
        return ex;
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern Exception InternalGetCOMHRExceptionObject(int hr, IntPtr pCPCMD, object pThis);
 
    internal static Exception GetPendingExceptionObject()
    {
        Exception ex = s_pendingExceptionObject;
        ex?.InternalPreserveStackTrace();
        s_pendingExceptionObject = null;
        return ex;
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr CreateCustomMarshalerHelper(IntPtr pMD, int paramToken, IntPtr hndManagedType);
 
    internal static IntPtr SafeHandleAddRef(SafeHandle pHandle, ref bool success)
    {
        if (pHandle == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.pHandle, ExceptionResource.ArgumentNull_SafeHandle);
        }
        pHandle.DangerousAddRef(ref success);
        return pHandle.DangerousGetHandle();
    }
 
    internal static void SafeHandleRelease(SafeHandle pHandle)
    {
        if (pHandle == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.pHandle, ExceptionResource.ArgumentNull_SafeHandle);
        }
        pHandle.DangerousRelease();
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr GetCOMIPFromRCW(object objSrc, IntPtr pCPCMD, out IntPtr ppTarget, out bool pfNeedsRelease);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr ProfilerBeginTransitionCallback(IntPtr pSecretParam, IntPtr pThread, object pThis);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void ProfilerEndTransitionCallback(IntPtr pMD, IntPtr pThread);
 
    internal static void CheckStringLength(int length)
    {
        CheckStringLength((uint)length);
    }
 
    internal static void CheckStringLength(uint length)
    {
        if (length > 2147483632)
        {
            throw new MarshalDirectiveException(SR.Marshaler_StringTooLong);
        }
    }
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal unsafe static extern void FmtClassUpdateNativeInternal(object obj, byte* pNative, ref CleanupWorkListElement pCleanupWorkList);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal unsafe static extern void FmtClassUpdateCLRInternal(object obj, byte* pNative);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal unsafe static extern void LayoutDestroyNativeInternal(object obj, byte* pNative);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern object AllocateInternal(IntPtr typeHandle);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void MarshalToUnmanagedVaListInternal(IntPtr va_list, uint vaListSize, IntPtr pArgIterator);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void MarshalToManagedVaListInternal(IntPtr va_list, IntPtr pArgIterator);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern uint CalcVaListSize(IntPtr va_list);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void ValidateObject(object obj, IntPtr pMD, object pThis);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void LogPinnedArgument(IntPtr localDesc, IntPtr nativeArg);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void ValidateByref(IntPtr byref, IntPtr pMD, object pThis);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    [Intrinsic]
    internal static extern IntPtr GetStubContext();
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr GetStubContextAddr();
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void ArrayTypeCheck(object o, object[] arr);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern void MulticastDebuggerTraceHelper(object o, int count);
 
    [MethodImpl(MethodImplOptions.InternalCall)]
    internal static extern IntPtr NextCallReturnAddress();
}