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matlabsegmentation-faulttry-catchmex
JaBe
JaBe

Reputation: 684

Is there a way to catch MEX-function segmentation-faults in Matlab?

When a Mex-function produces a segmentation-fault, a MATLAB System Error window pops-up and choosing Attempt to Continue leads to a lot of useless debugging information which is purred into the command window.

Is it possible to catch these mex-exceptions in Matlab or at least to be able to process them later on?

Unfortunately, following conventional try/catch won't work in this cases:

try
   myMex(input)
catch
   error('Mex failed')
end

Please note that I do not want to catch the error inside the mex.

Upvotes: 0

Views: 911

Answers (1)

ThP
ThP

Reputation: 2342

If you have the source code, you can compile the mex with debug mode (-g flag).
Then, depending on your platform, you can run the mex in debug mode (check out Troubleshoot MEX-Files on MATLAB docs).
If you are running in windows, you can use Visual Studio and select debug->Attach to Process and choose MATLAB. Then you can run your mex file, which will trigger an exception (and a breakpoint) in VS rather than MATLAB.

Upvotes: 1

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