a807755db1
This avoids potential deadlock, see the warnings in https://docs.python.org/2/library/subprocess.html#popen-objects. I found that enabling the C API caused us to deadlock without this change. PiperOrigin-RevId: 183730170
82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# =============================================================================
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"""Test to make sure stack trace is generated in case of test failures."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import argparse
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import os
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import signal
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import subprocess
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import sys
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from tensorflow.python.platform import test
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from tensorflow.python.platform import tf_logging as logging
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# FLAGS defined at the bottom:
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# child (bool) set to true if we are running in the child process.
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FLAGS = None
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_CHILD_FLAG_HELP = 'Boolean. Set to true if this is the child process.'
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class StacktraceHandlerTest(test.TestCase):
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def testChildProcessKillsItself(self):
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if FLAGS.child:
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os.kill(os.getpid(), signal.SIGABRT)
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def testGeneratesStacktrace(self):
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if FLAGS.child:
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return
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# Subprocess sys.argv[0] with --child=True
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if sys.executable:
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child_process = subprocess.Popen(
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[sys.executable, sys.argv[0], '--child=True'], cwd=os.getcwd(),
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stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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else:
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child_process = subprocess.Popen(
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[sys.argv[0], '--child=True'], cwd=os.getcwd(),
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stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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# Capture its output. capture both stdout and stderr and append them.
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# We are not worried about timing or order of messages in this test.
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child_stdout, child_stderr = child_process.communicate()
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child_output = child_stdout + child_stderr
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# Make sure the child process is dead before we proceed.
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child_process.wait()
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logging.info('Output from the child process:')
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logging.info(child_output)
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# Verify a stack trace is printed.
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self.assertIn(b'PyEval_EvalFrame', child_output)
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument(
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'--child', type=bool, default=False, help=_CHILD_FLAG_HELP)
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FLAGS, unparsed = parser.parse_known_args()
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# Now update argv, so that unittest library does not get confused.
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sys.argv = [sys.argv[0]] + unparsed
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test.main()
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