Index: third_party/protobuf/python/google/protobuf/internal/testing_refleaks.py |
diff --git a/third_party/protobuf/python/google/protobuf/internal/testing_refleaks.py b/third_party/protobuf/python/google/protobuf/internal/testing_refleaks.py |
new file mode 100644 |
index 0000000000000000000000000000000000000000..8ce06519bc7c010549285665e5acb2bcf4094743 |
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+++ b/third_party/protobuf/python/google/protobuf/internal/testing_refleaks.py |
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+# Protocol Buffers - Google's data interchange format |
+# Copyright 2008 Google Inc. All rights reserved. |
+# https://developers.google.com/protocol-buffers/ |
+# |
+# Redistribution and use in source and binary forms, with or without |
+# modification, are permitted provided that the following conditions are |
+# met: |
+# |
+# * Redistributions of source code must retain the above copyright |
+# notice, this list of conditions and the following disclaimer. |
+# * Redistributions in binary form must reproduce the above |
+# copyright notice, this list of conditions and the following disclaimer |
+# in the documentation and/or other materials provided with the |
+# distribution. |
+# * Neither the name of Google Inc. nor the names of its |
+# contributors may be used to endorse or promote products derived from |
+# this software without specific prior written permission. |
+# |
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ |
+"""A subclass of unittest.TestCase which checks for reference leaks. |
+ |
+To use: |
+- Use testing_refleak.BaseTestCase instead of unittest.TestCase |
+- Configure and compile Python with --with-pydebug |
+ |
+If sys.gettotalrefcount() is not available (because Python was built without |
+the Py_DEBUG option), then this module is a no-op and tests will run normally. |
+""" |
+ |
+import gc |
+import sys |
+ |
+try: |
+ import copy_reg as copyreg #PY26 |
+except ImportError: |
+ import copyreg |
+ |
+try: |
+ import unittest2 as unittest #PY26 |
+except ImportError: |
+ import unittest |
+ |
+ |
+class LocalTestResult(unittest.TestResult): |
+ """A TestResult which forwards events to a parent object, except for Skips.""" |
+ |
+ def __init__(self, parent_result): |
+ unittest.TestResult.__init__(self) |
+ self.parent_result = parent_result |
+ |
+ def addError(self, test, error): |
+ self.parent_result.addError(test, error) |
+ |
+ def addFailure(self, test, error): |
+ self.parent_result.addFailure(test, error) |
+ |
+ def addSkip(self, test, reason): |
+ pass |
+ |
+ |
+class ReferenceLeakCheckerTestCase(unittest.TestCase): |
+ """A TestCase which runs tests multiple times, collecting reference counts.""" |
+ |
+ NB_RUNS = 3 |
+ |
+ def run(self, result=None): |
+ # python_message.py registers all Message classes to some pickle global |
+ # registry, which makes the classes immortal. |
+ # We save a copy of this registry, and reset it before we could references. |
+ self._saved_pickle_registry = copyreg.dispatch_table.copy() |
+ |
+ # Run the test twice, to warm up the instance attributes. |
+ super(ReferenceLeakCheckerTestCase, self).run(result=result) |
+ super(ReferenceLeakCheckerTestCase, self).run(result=result) |
+ |
+ oldrefcount = 0 |
+ local_result = LocalTestResult(result) |
+ |
+ refcount_deltas = [] |
+ for _ in range(self.NB_RUNS): |
+ oldrefcount = self._getRefcounts() |
+ super(ReferenceLeakCheckerTestCase, self).run(result=local_result) |
+ newrefcount = self._getRefcounts() |
+ refcount_deltas.append(newrefcount - oldrefcount) |
+ print(refcount_deltas, self) |
+ |
+ try: |
+ self.assertEqual(refcount_deltas, [0] * self.NB_RUNS) |
+ except Exception: # pylint: disable=broad-except |
+ result.addError(self, sys.exc_info()) |
+ |
+ def _getRefcounts(self): |
+ copyreg.dispatch_table.clear() |
+ copyreg.dispatch_table.update(self._saved_pickle_registry) |
+ # It is sometimes necessary to gc.collect() multiple times, to ensure |
+ # that all objects can be collected. |
+ gc.collect() |
+ gc.collect() |
+ gc.collect() |
+ return sys.gettotalrefcount() |
+ |
+ |
+if hasattr(sys, 'gettotalrefcount'): |
+ BaseTestCase = ReferenceLeakCheckerTestCase |
+ SkipReferenceLeakChecker = unittest.skip |
+ |
+else: |
+ # When PyDEBUG is not enabled, run the tests normally. |
+ BaseTestCase = unittest.TestCase |
+ |
+ def SkipReferenceLeakChecker(reason): |
+ del reason # Don't skip, so don't need a reason. |
+ def Same(func): |
+ return func |
+ return Same |