fopen fails with absolute path in linux host (ubuntu 20.04)

I am using ARM FVP simulator and trying to read data from a binary file in the host PC to a program running in ARM,

const char *filename = "home/dinusha/executorch/examples/arm/executor_runner/cmake-out/input.bin";

FILE* fp = fopen(filename, "rb");
if (!fp) {
ET_LOG(
Fatal,
"Could not open file %s (errno: %d) for reading, exiting!",
filename,
errno);
_exit(1);
}

Error : Could not open file home//dinusha//executorch//examples//arm//executor_runner//cmake-out//input.bin (errno: 0) for reading, exiting!

Any idea how to solve this, 

Thanks