Unmanaged code calling causes a WCF process to crash [closed]

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I have a class which includes managed code calling to unmanaged code via C++\CLI wrapper. Where running the class in a console application produces no errors.

But when I wrapped it up with a WCF service the application crashes when the code reaches the point of calling unmanaged code.

The problem is when passing a const wchar_t* 开发者_如何学Pythonvariable as input to the unmanaged code:

String^ text = … // Unicode Encoded text;  
const wchar_t* chars = reinterpret_cast<const wchar_t*>    ((Marshal::StringToHGlobalUni(string)).ToPointer());  
unmanaged_class::Process(chars);   

Also tried this with no luck:

pin_ptr<const wchar_t> chars = ...  

The application just shutdown without any exception.

I am working on Windows Server 2008 64 bit machine with .NET 4.0.

The application is configured to run on 64bit platform.

Any ideas?

Cheers, Doron.

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You invoked undefined behavior somewhere in your unmanaged code.

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It seems that the problem was buried in the unmanaged code which is 3rd party code who had a bug and crashed in this scenario.

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This is a completely wild guess, but shouldn't the chars pointer be pinned?

pin_ptr<const wchar_t> chars = ...

Another wild guess: does it need to be kept alive using GC::KeepAlive( chars ); after the unmanaged call?