Breakpointing pyd at runtime cause a crash

[Dariusz1989]

Hey

Not sure if it's a user error or what but I'm hitting this >

Here is the story
I have an app that is written in c++ and has a python interpreter exposed via boost. (not mine, no source access.)
They are using python 3.7.XX.

I've created a c++ library file and used pybind11 to build it using python37.

I can import the module just fine and call functions/pass objects/etc all great.
However, if I try to attach a debugger in Clion or MSVC I will get a crash(above picture)

Now I'm not sure if it's just "not supported" or if I need to enable something in my dll/pyd file to allow for remote debugging.

These are my flags.

add_compile_options(/Zi /MDd /RTC1 /Od)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Zi /Od")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /DEBUG")

• probably a few more.

I've used Debug version of build, Release does not breakpoint/crash.

I also have this as my error stack trace...

00007FFAE47AEAA5 (ucrtbased): (filename not available): get_wide_winmain_command_line
00007FFAE47AE8C3 (ucrtbased): (filename not available): get_wide_winmain_command_line
00007FFAE47B158F (ucrtbased): (filename not available): wassert
00007FFACC14B3F0 (python37_d): (filename not available): PyAST_Validate
S:\vcpkg\installed\x64-windows\include\pybind11\detail\internals.h (414): `pybind11::detail::get_internals'::`2'::gil_scoped_acquire_local::gil_scoped_acquire_local
S:\vcpkg\installed\x64-windows\include\pybind11\detail\internals.h (417): pybind11::detail::get_internals
S:\RnD\DLL_python\c_DLL_Python_01\icLib\library.cpp (34): PyInit_mydll
00007FFB7052F87F (python37): (filename not available): PyImport_AppendInittab
00007FFB7052F0AE (python37): (filename not available): PyImport_Import
00007FFB7052A12B (python37): (filename not available): Py_GetVersion
00007FFB70436D0F (python37): (filename not available): PyMethodDef_RawFastCallDict
00007FFB70436EDE (python37): (filename not available): PyCFunction_FastCallDict
00007FFB705044C3 (python37): (filename not available): PyEval_GetFuncDesc
00007FFB70501288 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB70502F95 (python37): (filename not available): PyEval_EvalCodeWithName
00007FFB70436B2B (python37): (filename not available): PyFunction_FastCallKeywords
00007FFB7050434F (python37): (filename not available): PyEval_GetFuncDesc
00007FFB70501148 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB704366B5 (python37): (filename not available): PyObject_Call
00007FFB70436A52 (python37): (filename not available): PyFunction_FastCallKeywords
00007FFB7050434F (python37): (filename not available): PyEval_GetFuncDesc
00007FFB7050116D (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB704366B5 (python37): (filename not available): PyObject_Call
00007FFB70436A52 (python37): (filename not available): PyFunction_FastCallKeywords
00007FFB7050434F (python37): (filename not available): PyEval_GetFuncDesc
00007FFB704FF316 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB704366B5 (python37): (filename not available): PyObject_Call
00007FFB70436A52 (python37): (filename not available): PyFunction_FastCallKeywords
00007FFB7050434F (python37): (filename not available): PyEval_GetFuncDesc
00007FFB704FF316 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB704366B5 (python37): (filename not available): PyObject_Call
00007FFB70436A52 (python37): (filename not available): PyFunction_FastCallKeywords
00007FFB7050434F (python37): (filename not available): PyEval_GetFuncDesc
00007FFB704FF316 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB704366B5 (python37): (filename not available): PyObject_Call
00007FFB70437F75 (python37): (filename not available): PyObject_CallMethodId_SizeT
00007FFB704380A3 (python37): (filename not available): PyObject_CallMethodIdObjArgs
00007FFB7052E448 (python37): (filename not available): PyImport_ImportModuleLevelObject
00007FFB704F897F (python37): (filename not available): PyAST_Optimize
00007FFB7043745A (python37): (filename not available): PyCFunction_Call
00007FFB705044C3 (python37): (filename not available): PyEval_GetFuncDesc
00007FFB70501288 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB70502F95 (python37): (filename not available): PyEval_EvalCodeWithName
00007FFB704369A3 (python37): (filename not available): PyFunction_FastCallDict
00007FFB70504A95 (python37): (filename not available): PyEval_SliceIndexNotNone
00007FFB70500B55 (python37): (filename not available): PyEval_EvalFrameDefault
00007FFB70502F95 (python37): (filename not available): PyEval_EvalCodeWithName
00007FFB7055DC2D (python37): (filename not available): PyRun_FileExFlags
00007FFB7055D768 (python37): (filename not available): PyRun_StringFlags
00007FFB7055BA42 (python37): (filename not available): PyRun_SimpleStringFlags

Error log is a little big as I'm doing some tests before the error which work fine (print/call function/etc) so the part that matters is near the top.

[Dariusz1989]

Hey
Bumping it up with some examples. I cant even get hello world to work with debugger/breakpoiting... This crashes on import >

CMakeList.txt

cmake_minimum_required(VERSION 3.4)
project(pybind11_example)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

#find_package(pybind11 REQUIRED)
find_package(pybind11 CONFIG REQUIRED)
set(PYTHON_EXECUTABLE "S:/vcpkg_clion/packages/python3_x64-windows/tools/python3")
link_directories("S:/vcpkg_clion/packages/python3_x64-windows/lib")
pybind11_add_module(example_module example.cpp)
target_link_libraries(example_module PRIVATE pybind11::lto pybind11::embed pybind11::module pybind11::headers)
# Uncomment the following line to build a debug version of the module
set_target_properties(example_module PROPERTIES COMPILE_FLAGS "-g")

example.cpp

#include <pybind11/pybind11.h>

namespace py = pybind11;

int add(int i, int j) {
    return i + j;
}

PYBIND11_MODULE(example_module, m) {
m.doc() = "pybind11 example plugin"; // optional module docstring

m.def("add", &add, "A function which adds two numbers");
}

vcpkg.json

{
  "name" : "c-dll-python-01",
  "version-string" : "1.0.0",
  "builtin-baseline" : "91dd61bd441a68b4017b61011d0350b2e6aeeccf",
  "dependencies" : [  {
    "name" : "pybind11",
    "version>=" : "2.10.0#1"
  } ]
}

importTest.py

import sys

sys.path.insert(0, "S:/RnD/DLL_python/04_pybind_Debug_01/cmake-build-debug")
import example_module

print(example_module.add(1, 2))  # Output: 3