86 lines
3.3 KiB
Python
86 lines
3.3 KiB
Python
# Copyright 2020 The TensorFlow Authors. All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
# =============================================================================
|
|
"""A Python wrapper that loads _pywrap_tensorflow_internal.so."""
|
|
|
|
from __future__ import absolute_import
|
|
from __future__ import division
|
|
from __future__ import print_function
|
|
|
|
import ctypes
|
|
import sys
|
|
import traceback
|
|
|
|
from tensorflow.python.platform import self_check
|
|
|
|
# Perform pre-load sanity checks in order to produce a more actionable error.
|
|
self_check.preload_check()
|
|
|
|
# pylint: disable=wildcard-import,g-import-not-at-top,unused-import,line-too-long
|
|
|
|
try:
|
|
# This import is expected to fail if there is an explicit shared object
|
|
# dependency (with_framework_lib=true), since we do not need RTLD_GLOBAL.
|
|
from tensorflow.python import pywrap_dlopen_global_flags
|
|
_use_dlopen_global_flags = True
|
|
except ImportError:
|
|
_use_dlopen_global_flags = False
|
|
|
|
# On UNIX-based platforms, pywrap_tensorflow is a python library that
|
|
# dynamically loads _pywrap_tensorflow.so.
|
|
_can_set_rtld_local = (
|
|
hasattr(sys, 'getdlopenflags') and hasattr(sys, 'setdlopenflags'))
|
|
if _can_set_rtld_local:
|
|
_default_dlopen_flags = sys.getdlopenflags()
|
|
|
|
try:
|
|
if _use_dlopen_global_flags:
|
|
pywrap_dlopen_global_flags.set_dlopen_flags()
|
|
elif _can_set_rtld_local:
|
|
# Ensure RTLD_LOCAL behavior for platforms where it isn't the default
|
|
# (macOS). On Linux RTLD_LOCAL is 0, so this does nothing (and would not
|
|
# override an RTLD_GLOBAL in _default_dlopen_flags).
|
|
sys.setdlopenflags(_default_dlopen_flags | ctypes.RTLD_LOCAL)
|
|
|
|
# Python2.7 does not have a ModuleNotFoundError.
|
|
try:
|
|
ModuleNotFoundError
|
|
except NameError:
|
|
ModuleNotFoundError = ImportError
|
|
|
|
# pylint: disable=wildcard-import,g-import-not-at-top,line-too-long,undefined-variable
|
|
try:
|
|
from tensorflow.python._pywrap_tensorflow_internal import *
|
|
# This try catch logic is because there is no bazel equivalent for py_extension.
|
|
# Externally in opensource we must enable exceptions to load the shared object
|
|
# by exposing the PyInit symbols with pybind. This error will only be
|
|
# caught internally or if someone changes the name of the target _pywrap_tensorflow_internal.
|
|
|
|
# This logic is used in other internal projects using py_extension.
|
|
except ModuleNotFoundError:
|
|
pass
|
|
|
|
if _use_dlopen_global_flags:
|
|
pywrap_dlopen_global_flags.reset_dlopen_flags()
|
|
elif _can_set_rtld_local:
|
|
sys.setdlopenflags(_default_dlopen_flags)
|
|
except ImportError:
|
|
msg = """%s\n\nFailed to load the native TensorFlow runtime.\n
|
|
See https://www.tensorflow.org/install/errors\n
|
|
for some common reasons and solutions. Include the entire stack trace
|
|
above this error message when asking for help.""" % traceback.format_exc()
|
|
raise ImportError(msg)
|
|
|
|
# pylint: enable=wildcard-import,g-import-not-at-top,unused-import,line-too-long
|