Hi, > On 9/8/2010 21:26, Sébastien Villemot wrote: >> Hi, >> >> Some extra information on the problem that I described in my previous >> post, and >> which I suspect to be a bug in MinGW-w64 for 64-bit platform. >> >> I attach a sample testcase, which I compile with: >> >> x86_64-w64-mingw32-gcc -g -O2 -fexceptions -Wall -shared >> -I~/MATLAB/extern/include mextest.c -o mextest.mexw64 >> -L~MATLAB/bin/win64 -lmex >> >> The libmex.dll contains both mexErrMsgTxt() and mexPrintf(). >> >> As such, the example makes MATLAB crash. >> >> But if I comment out the second function call (mexPrintf()), then the >> DLL >> behaves as expected: MATLAB catches the exception thrown by >> mexErrMsgTxt(), and >> displays the error message. >> >> It is very strangs since having or not the mexPrintf() should not change >> the >> result, since it is never reached. >> >> So it looks like a compiler bug, unless Iâm missing something ? Iâm >> not >> familiar with exception unwinding, so please forgive my ignorance. >> >> Any idea ? >> >> Best regards, > > Hi, > > sorry for the lack of responses, its hard to know what is wrong when > nobody is familiar with Matlab internals. > > How exactly is a matlab exception thrown and caught anyway?
Please excuse my ignorance, I just read the subject and not the details but I would like to note that throwing/catching exceptions between DSO's (dynamically linked objects) can be very tricky with gcc, see http://gcc.gnu.org/wiki/Visibility esp. the Section "Problems with C++ exceptions" I couldn't get exceptions to work between DSO's _at_all_ when the exceptions where defined in a static library. So you might want to take a close look before using them. Hope this is useful, and if not, please forgive my ignorance! All the best, Mario ------------------------------------------------------------------------------ This SF.net Dev2Dev email is sponsored by: Show off your parallel programming skills. Enter the Intel(R) Threading Challenge 2010. http://p.sf.net/sfu/intel-thread-sfd _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
