Load zip file in deploy interpreter (#71072)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71072
This PR replaces the old logic of loading frozen torch through cpython by directly loading zipped torch modules directly onto deploy interpreter. We use elf file to load the zip file as its' section and load it back in the interpreter executable. Then, we directly insert the zip file into sys.path of the each initialized interpreter. Python has implicit ZipImporter module that can load modules from zip file as long as they are inside sys.path.
Test Plan: buck test //caffe2/torch/csrc/deploy:test_deploy
Reviewed By: shunting314
Differential Revision: D32442552
fbshipit-source-id: 627f0e91e40e72217f3ceac79002e1d8308735d5
