init.cpp

#include <torch/csrc/dynamo/init.h>

#include <pybind11/stl_bind.h>
#include <torch/csrc/Exceptions.h>
#include <torch/csrc/dynamo/cache_entry.h>
#include <torch/csrc/dynamo/cpython_defs.h>
#include <torch/csrc/dynamo/eval_frame.h>
#include <torch/csrc/dynamo/extra_state.h>
#include <torch/csrc/dynamo/guards.h>
#include <torch/csrc/dynamo/python_compiled_autograd.h>
#include <torch/csrc/utils/pybind.h>
#include <torch/csrc/utils/python_compat.h>

static struct PyModuleDef _module =
    {PyModuleDef_HEAD_INIT, "torch._C._dynamo", "", -1, nullptr};

PYBIND11_MAKE_OPAQUE(std::vector<uint8_t>);

namespace torch::dynamo {

#if IS_PYTHON_3_11_PLUS

std::vector<uint8_t> _PyOpcode_Caches_vec(
    THP_PyOpcode_Caches,
    THP_PyOpcode_Caches + THP_PyOpcode_Caches_size);

#else

std::vector<uint8_t> _PyOpcode_Caches_vec;

#endif

using torch::dynamo::autograd::torch_c_dynamo_compiled_autograd_init;

void initDynamoBindings(PyObject* torch) {
  PyObject* dynamo = PyModule_Create(&_module);
  if (dynamo == nullptr || PyModule_AddObject(torch, "_dynamo", dynamo) != 0) {
    throw python_error();
  }

  PyObject* eval_frame = torch_c_dynamo_eval_frame_init();
  if (eval_frame == nullptr ||
      PyModule_AddObject(dynamo, "eval_frame", eval_frame) != 0) {
    throw python_error();
  }

  PyObject* guards = torch_c_dynamo_guards_init();
  if (guards == nullptr || PyModule_AddObject(dynamo, "guards", guards) != 0) {
    throw python_error();
  }

  PyObject* compiled_autograd = torch_c_dynamo_compiled_autograd_init();
  if (compiled_autograd == nullptr ||
      PyModule_AddObject(dynamo, "compiled_autograd", compiled_autograd) != 0) {
    throw python_error();
  }

  auto m = py::handle(eval_frame).cast<py::module>();

  py::class_<CacheEntry>(m, "_CacheEntry")
      .def_readonly("check_fn", &CacheEntry::check_fn)
      .def_readonly("code", &CacheEntry::code)
      .def_property_readonly("next", &CacheEntry::next);

  py::class_<ExtraState>(m, "_ExtraState")
      .def("invalidate", &ExtraState::invalidate);

  m.def("_debug_get_cache_entry_list", &_debug_get_cache_entry_list);
  py::bind_vector<std::vector<uint8_t>>(m, "VectorUInt8");
  m.attr("py_opcode_caches") = _PyOpcode_Caches_vec;
}

} // namespace torch::dynamo