Debugging Python and C++ exposed by boost together

Question

I can debug Python code using ffffd -pydb prog.py. All the python command line arguments can be passed too after prog.py. In my case, many classes ha

Answer 1

I had a similar problem, but failed to get the solutions in Chan's answer to work (on MAC OS X 10.12.4). Instead the following worked for me.

1. Write a python script test.py that imports and uses the boost.Python module.

2. start python in the debugger

   lldb python3 test.py
   

   giving

   > lldb python3 test.py
   (lldb) target create "python3"
   Current executable set to 'python3' (x86_64).
   (lldb) settings set -- target.run-args  "test.py"
   (lldb) run
   Process 46189 launched: '/Users/me/anaconda/bin/python3' (x86_64)
   test.cpython-36m-darwin.so was compiled with optimization - stepping may behave oddly; variables may not be available.
   Process 46189 stopped
   * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x10d4b3000)
   frame #0: 0x00000001019f49c2 test.cpython-36m-darwin.so`std::__1::enable_if::type (anonymous namespace)::Render2D::add_particle(float*, float, float, float, float) const [inlined] mylib::SSE::packed<8ul, float>::loadu(
      944        { return {_mm256_load_ps(p)}; }
      945        /// load from unaligned memory location
      946        static __always__inline packed loadu(const element_type*p) noexcept
   -> 947        { return {_mm256_loadu_ps(p)}; }
      948        /// load from aligned memory location, using template arg for alignment
      949        template
   
      950        static __always_inline enable_if_t< aligned, packed>
   

No need to obtain the pid and start the debugger from a separate window or set any breakpoints.