Marshal.GetHRForException does more than just Get-HR-For-Exception

Returns a pointer to an IUnknown interface that represents the specified interface on the specified object. Custom query interface access is controlled by the specified customization mode. Gets a pointer to a runtime-generated function that marshals a call from unmanaged to managed code. Object Object Object Object. It's pretty much used by the framework itself and it's rare to see it outside of the CLR source. Marshals data from an unmanaged block of memory to a newly allocated managed object of the type specified by a generic type parameter. Request for the permission of type 'System.

Note that the GetHRForException method sets the IErrorInfo interface of the current thread. This can cause unexpected results for methods like the ThrowExceptionForHR methods that default to using the IErrorInfo of the current thread if it is set.

Your Answer

I think there is a runtime mechanism for testing if permissions are available, but haven't been able to find it. Is this blog article the answer? ShawnFa of Microsoft says that you cannot do a try Therefore to avoid the SecurityException, I need to extract Marshal. GetHRForException into a separate method. The method required is SecurityPermission. It returns a true or false indicating whether the permission is allowed or not. It does not demand a permission, as does SecurityPermission.

UnmanagedCode to see if the assembly is allowed to call unmanaged code, and then call the unmanaged code only if allowed. There is one additional twist. Hence, my method that calls Marshal. NET with medium trust. Therefore, we must never JIT the method that calls Marshal. GetHRForException get you anything you can't get by checking the type of exception? It looks like it uses a static mapping. By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies.

But running this code within ASP. Request for the permission of type 'System. I think the exception is occurring because GetHRForException calls into unmanaged code, which is not permitted in medium trust.

Cheeso k 72 Here's some example code: UnmanagedCode ; if p. Yes - medium trust will not allow calls into unmanaged code. The only trust level that allows it is full trust. CAS demands can take place at runtime, but the hosting environment can also go on a wander and look for things it can't do. You can test to see if you can make a call to unmanaged code by using a CAS demand with an instance of SecurityPermission.

OK, this is great info. This covers part b of Q3. But what about part a? Can I mark my method with a security attribute or Remember, my theory is that the SecurityPermission error is not happening at runtime, it is happening during JIT - and I think you confirmed that this is possible. Returns a pointer to an IUnknown interface that represents the specified interface on the specified object.

Custom query interface access is enabled by default. Custom query interface access is controlled by the specified customization mode. Returns a pointer to an IUnknown interface that represents the specified interface on an object of the specified type.

Returns an interface pointer that represents the specified interface for an object, if the caller is in the same context as that object. Retrieves a computer-independent description of an exception, and information about the state that existed for the thread when the exception occurred. Converts a delegate of a specified type to a function pointer that is callable from unmanaged code. Returns an IDispatch interface from a managed object. Returns an IDispatch interface pointer from a managed object, if the caller is in the same context as that object.

Returns a ITypeInfo interface from a managed type. Returns an IUnknown interface from a managed object. Returns an IUnknown interface from a managed object, if the caller is in the same context as that object. Returns the error code returned by the last unmanaged function that was called using platform invoke that has the SetLastError flag set.

Gets a pointer to a runtime-generated function that marshals a call from managed to unmanaged code. Gets the first slot in the virtual function table v-table or VTBL that contains user-defined methods.

Converts a fiber cookie into the corresponding Thread instance. Converts an unmanaged ITypeInfo object into a managed Type object.

Retrieves the name of the type represented by an ITypeInfo object. Retrieves the library identifier LIBID that is assigned to a type library when it was exported from the specified assembly. Retrieves the version number of a type library that will be exported from the specified assembly.

Gets a pointer to a runtime-generated function that marshals a call from unmanaged to managed code. Calculates the number of bytes in unmanaged memory that are required to hold the parameters for the specified method. Allocates a managed String and copies all characters up to the first null character from a string stored in unmanaged memory into it. Allocates a managed String and copies the specified number of characters from a string stored in unmanaged memory into it.

Allocates a managed String and copies all characters up to the first null character from an unmanaged Unicode string into it. Allocates a managed String and copies a specified number of characters from an unmanaged Unicode string into it. Marshals data from an unmanaged block of memory to a newly allocated managed object of the specified type. Marshals data from an unmanaged block of memory to a newly allocated managed object of the type specified by a generic type parameter.

Copies the contents of a managed SecureString object to a block of memory allocated from the unmanaged COM task allocator. Copies the contents of a managed SecureString object into unmanaged memory. Copies the contents of a managed String to a block of memory allocated from the unmanaged COM task allocator.

Copies the contents of a managed String into unmanaged memory, converting into ANSI format as it copies. Copies the contents of a managed String into unmanaged memory, converting into ANSI format if required. Copies the contents of a managed String into unmanaged memory. Our new feedback system is built on GitHub Issues. Read about this change in our blog post. Object Object Object Object. We'd love to hear your thoughts.

Popular Tags

GetHRForException(Exception) GetHRForException(Exception) GetHRForException(Exception) GetHRForException(Exception) Converts the specified exception to an HRESULT. GetHRForLastWin32Error() GetHRForLastWin32Error() GetHRForLastWin32Error() GetHRForLastWin32Error(). loamcalculator.ml API Reference documentation has a new home. Visit loamcalculator.ml API Browser on loamcalculator.ml to see the new experience. Retrieves a code . I have some IO code that reads a stream within a loamcalculator.ml It catches IOException and calls loamcalculator.mlorException() within the catch, in .