Hi,
I was trying to playaround CUDA APIs. I was trying to write my own implementation of:
cudaError_t cudaMalloc (void ** devPtr, size_t size)
But as expected nvcc raise an error : "(.text+0x41d60): multiple definition of `cudaMalloc’ ".
Is there a way to write own implementation of CUDA library ?
Thank you
injecting your own implementation of API calls without modifying existing binaries can be done (on most Linux/Unix systems) through LD_PRELOAD
If you have the source code of the program, you can just use a global preprocessor macro to reroute specific function calls to a differently named version of this call like e.g.
e.g define malloc(x) my_malloc(x)
Is there a way to write own implementation of CUDA library ?
If you want to do this, you have to provide all public functions of the original CUDA device API. With the LD_PRELOAD trick you can override just selected functions.
Hi cbuchner1,
I have tried the trick for `cudaMalloc` API. I was getting this error:
/usr/local/cuda/bin/…//lib64/libcudart_static.a(libcudart_static.a.o): In function cudaMalloc': (.text+0x41d60): multiple definition of cudaMalloc’
/tmp/tmpxft_00005994_00000000-10_lib.o:tmpxft_00005994_00000000-5_lib.cudafe1.cpp:(.text+0x15): first defined here
collect2: error: ld returned 1 exit status
which means nvcc already has the implementation and hence the compilation was failing. Can we resolve this ?
I also tried below and got same error: