无法在共享对象库中插入断点 x，（python 使用 C++ 中的 .so 库）

Question

I'm trying to analyze c++ which is made into a .so file using pybind11. The .so file has python API so the main python program uses the python API and calls functions in the .so file. I use two debugger for python (pdb) and c++ (gdb). When I set breakpoint in the gdb, I get this error :

Cannot insert breakpoint 1.
Cannot access memory at address 0xb41798

when I set breakpoint in c++, there is no complaint, but when the program resumes in python, I have this error message in c++ debug window. How can I solve this problem?

ADD : here is how I run the debuggers .
for pdb : python3 -m pdb test.py for gdb : ddd /usr/loca/.../dlib...gnu.so 10498 where 10498 was the process id of the python program
I made the .so file (dlib c++ to .so file containing python API) like this :
sudo python3 setup.py install --clean --set USE_AVX_INSTRUCTIONS=1 --set DLIB_USE_CUDA=1 --set CUDA_NVCC_FLAGS="--expt-relaxed-constexpr" --compiler-flags "-O0 -g"
the setup.cfg file has

[build_ext]  
debug = 1

maybe a problem in the way I made the .so file in?

Answer 1

for gdb : ddd /usr/loca/.../dlib...gnu.so 10498

Your DDD invocation is incorrect: the process 10498 is not running your dlib...gnu.so binary, it is running python3 binary with the .so loaded into it.

You need to invoke it like so: ddd python3 10498 .