VS debug, Attach to python.exe does not hit the break point

#1

I am using VS 2017 and xgboost 1.0 in Windows10.
I want to see variables changing in C++ code, and attached xgboost code to a running python project. Even though symbols loaded, I still can’t get the breakpoint hit.
I am new to C++ so I created a test dll project and a test python project to make sure I know how to debug with two project by attaching, and it hits the breakpoint successfully.
Is it because the C++ codes live in objxgboost project rather then xgboost project which make it can’t be debugging? How can I solve it?

#2

It’s in modules view the pdb file of xgboost loaded, but the breakpoint in code still shows no symbols have been loaded.

#3

There’s xgboost.exe and xgboost.dll. Make sure you are loading symbols for xgboost.dll, not xgboost.exe, since the Python package uses the DLL file.

#4

Thank you for your reply.
I compiled the xgboost project so it indeed created symbols for dll. In fact I have also compiled the runxgboost project and created xgboost.exe and it’s symbols, tried, but also failed.

#5

I have no idea why breakpoint fails. For now you can insert std::cout to emit debugging logs.

#6

Add logs is a good idea. And the breakpoints set in the functions still don’t work. So check the output in console will be my only way to look into it.