This example shows how to debug
found in your
with Microsoft® Visual Studio® 2010.
Make sure Visual Studio is your selected C compiler:
cc = mex.getCompilerConfigurations('C','Selected'); cc.Name
ans = Microsoft Visual C++ 2010 (C)
Compile the source MEX file with the
which builds the file with debugging symbols included. For example:
copyfile(fullfile(matlabroot,'extern','examples','mex','yprime.c'),'.','f') mex -g yprime.c
Start Visual Studio. Do not exit your MATLAB® session.
From the Visual Studio Tools menu, select Attach to Process...
In the Attach to Process dialog box, select the MATLAB process and click Attach.
Visual Studio loads data then displays an empty code pane.
Open the source file
selecting File > Open > File. Locate
Set a breakpoint by right-clicking the desired line
of code and following Breakpoint > Insert Breakpoint on the context
menu. It is often convenient to set a breakpoint at
stop at the beginning of the gateway routine.
If you have not yet run the executable file, ignore any "
icon that appears with the breakpoint next to the line of code.
Once you hit one of your breakpoints, you can make full use of any commands the debugger provides to examine variables, display memory, or inspect registers.
Open MATLAB and type:
yprime.c is opened in the Visual Studio debugger
at the first breakpoint.
If you select Debug > Continue, MATLAB displays:
ans = 2.0000 8.9685 4.0000 -1.0947
For more information on how to debug in the Visual Studio environment, see your Microsoft documentation.
Binary MEX files built with
-g option do not execute on other computers
because they rely on files that are not distributed with MATLAB.
For more information on isolating problems with MEX files, see Troubleshoot MEX Files.