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c++exceptionbinary-compatibility

C++ exceptions binary compatibility

my project uses 2 different C++ compilers, g++ and nvcc (cuda compiler). I have noticed exception thrown from nvcc object files are not caught in g++ object files.

are C++ exceptions supposed to be binary compatible in the same machine? what can cause such behavior?

try { kernel_= new cuda:: Kernel(); }
catch (...) { kernel_= NULL; }

// nvcc object
cuda:: Kernel:: Kernel () {
  ...
  if (! impl_) throw;
}

everything else seems to work (C++ objects, operators). To be honest I do not know exceptions very well so maybe there is mistake in the code above.

Solution

  • nvcc is a wrapper around a normal c++ compiler, and is basically a preprocessor to convert the cuda syntax into something compilable. You can see what compiler it uses with the --verbose flag.

    For instance on my machine compiling

    // test.cpp
int main(){return 0;}

    with nvcc -v gives

    #$ _SPACE_= 
#$ _MODE_=DEVICE
#$ _HERE_=/usr/local/cuda/bin
#$ _THERE_=/usr/local/cuda/bin
#$ TOP=/usr/local/cuda/bin/..
#$ PATH=/usr/local/cuda/bin/../open64/bin:/usr/local/cuda/bin/../bin:/Library/Frameworks/Python.framework/Versions/Current/bin:/Users/me/bin:/usr/local/aspell/bin:/usr/local/noweb:/usr/local/icon/bin:/usr/local/dmd/bin:/usr/local/cuda/bin:/usr/local/sed/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin
#$ INCLUDES="-I/usr/local/cuda/bin/../include"  
#$ LIBRARIES=  "-L/usr/local/cuda/bin/../lib" -lcudart
#$ CUDAFE_FLAGS=
#$ OPENCC_FLAGS=
#$ PTXAS_FLAGS=
#$ gcc -c -x c++ "-I/usr/local/cuda/bin/../include"   -I. -m32 -malign-double -o "/tmp/tmpxft_000010af_00000000-1_test.o" "test.cpp" 
#$ g++ -m32 -malign-double -o "a.out" "/tmp/tmpxft_000010af_00000000-1_test.o"   "-L/usr/local/cuda/bin/../lib" -lcudart

    Using the same compiler/flags as listed here should give you binary compatibility