cuda-gdb set breakpoint at another line of __global__ function - cuda

Question

Problem
I have a __global__ function in CUDA and I want to debug it using cuda-gdb but I cannot set a breakpoint inside the kernel and it points to another line. Here is my code
// include stuff
// ...
#define blockNUM 1
#define threadNUM 1
// ...
int main() {
// ... (define d_R_0, d_R_1, d_R_2, and d_H)
cudaSetDevice(0);
dim3 threadsPerBlock(threadNUM);
dim3 numBlocks(blockNUM);
decode<<<numBlocks,threadsPerBlock>>>(d_R_0, d_R_1, d_R_2, d_H);
// ... (other codes go here)
}
__global__ void decode(uint *d_R_0, uint *d_R_1, uint *d_R_2, uint *d_H) {
uint idx = (blockIdx.x * blockDim.x + threadIdx.x); // --> I want to set breakpoint here! (line 197) <--
// ... (implementation of the function)
} // --> But the cuda-gdb set the breakpoint here! (line 288) <--
And here is the cuda-gdb
(cuda-gdb) break 197
Breakpoint 1 at 0xa7f6: file /home/matin/main.cu, line 288.
Extra Info
I compile main.cu using this command:
$ nvcc -g -G main.cu
I also have the same problem with the A First CUDA C Program snippet on Nvidia's website
Specs:
GNU gdb (GDB) 10.1
NVIDIA (R) CUDA Debugger: 11.5 release
CUDA Version: 12.0
Ubuntu Version: 22.04

Answer 1

After updating my Nvidia drivers, I've encountered the same issue. I hope that this solution works for you too.
You have to set the breakpoint using the kernel function name. For example for the First CUDA C Program you should follow these steps:
Set a breakpoint using the kernel function name
(cuda-gdb) b saxpy
Breakpoint 1 at 0x338: file /home/nahid/temp/saxpy.cu, line 5.
Run to reach the breakpoint.
(cuda-gdb) r
Finally, set the breakpoint to the line that you want!
(cuda-gdb) b 7
Breakpoint 2 at 0xfffe3258e10: file saxpy.cu, line 7