MATLAB: Matlab crashes while debugging mex file

c codedebugdebug c codeMATLABmex

I am writing C code and compiling to mex files. I compile with the -g option and debug with Visual Studio (I use the Tools -> Attach to Process option in VS). However, when there is an error in the code and I stop the run (with the Stop Debugging button) Matlab crashes. This also happens if I simply run a mex file with an error and Visual Studio is not attached to Matlab.

Is there a way to debug C code without Matlab crashing?

Thanks a lot,

Michael.

Best Answer

With mex files, you are potentially corrupting the internal state of MATLAB. There is no protection layer or emulation layer: you get direct access to pointers being used by MATLAB and if (perhaps due to bugs) your code doesn't play well with MATLAB, then MATLAB will crash.

Related Solutions

MATLAB: How to set visual studio 2015 as default compiler in matlab

Visual Studio 2015 Community is not supported; you would need to use Visual Studio 2015 Professional.

MATLAB: CDA Request: Debug Level-2 Fortran S-function

Because a Level-2 FORTRAN S-Function contains both FORTRAN and C code, it is necessary to first MEX the FORTRAN source code into object files with debugging symbols, and then link the resulting objects with the runtime libraries for the FORTRAN compiler.

For example, given a FORTRAN source file foo.F and C source file bar.c, one could use the following MATLAB code to create the MEX file with debugging symbols:

mex -g -c foo.F
mex -g -L\[... path to runtime libraries ...]\ foo.obj bar.c

Once the debug MEX file has been created, you can start Visual Studio, set breakpoints in the source files where desired, attach MSVC to the current MATLAB process, and debug as you would for a C S-Function.

Best Answer

Related Solutions

MATLAB: How to set visual studio 2015 as default compiler in matlab

MATLAB: CDA Request: Debug Level-2 Fortran S-function

Related Question