How can I disable the debug assertion dialog on Windows?

Question

I have a bunch of unit tests that I\'m running in batch mode. Occasionally, one will crash with a debug assertion fired from the Visual C++ library. This causes a dialog t

Answer 1

Check out _CrtSetReportHook():

http://msdn.microsoft.com/en-us/library/0yysf5e6.aspx

MSDN advertises this as a robust way for an application to handle CRT runtime failures like assertions. Presumably you can define a report hook that dumps your process:

How to create minidump for my process when it crashes?

Answer 2

This code will disable display of dialog. Instead, it will print an error in the output window, and stderr.

int main( int argc, char **argv )
{
     if( !IsDebuggerPresent() )
     {
          _CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG );
          _CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDERR );
     }

     ...
}

The same must be applied for _CRT_ERROR if you use Q_ASSERT from Qt library.

Answer 3

I put the code for a suitable hook (that you can install with _CrtSetReportHook()) in: https://stackoverflow.com/a/28852798/2345997