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bpo-36389: _PyObject_CheckConsistency() available in release mode (GH-16612)

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bpo-36389, bpo-38376: The _PyObject_CheckConsistency() function is
now also available in release mode. For example, it can be used to
debug a crash in the visit_decref() function of the GC.

Modify the following functions to also work in release mode:

* _PyDict_CheckConsistency()
* _PyObject_CheckConsistency()
* _PyType_CheckConsistency()
* _PyUnicode_CheckConsistency()

Other changes:

* _PyMem_IsPtrFreed(ptr) now also returns 1 if ptr is NULL
  (equals to 0).
* _PyBytesWriter_CheckConsistency() now returns 1 and is only used
  with assert().
* Reorder _PyObject_Dump() to write safe fields first, and only
  attempt to render repr() at the end.
This commit is contained in:
Victor Stinner 2019-10-07 18:42:01 +02:00 • committed by GitHub
parent 321def805a
commit 6876257eaa
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 155 additions and 140 deletions
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17
Lib/test/test_gc.py
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@ -985,16 +985,19 @@ class GCCallbackTests(unittest.TestCase):
br'gcmodule\.c:[0-9]+: gc_decref: Assertion "gc_get_refs\(g\) > 0" failed.')
self.assertRegex(stderr,
br'refcount is too small')
self.assertRegex(stderr,
br'object : \[1, 2, 3\]')
self.assertRegex(stderr,
br'type : list')
self.assertRegex(stderr,
br'refcount: 1')
# "address : 0x7fb5062efc18"
# "address : 7FB5062EFC18"
address_regex = br'[0-9a-fA-Fx]+'
self.assertRegex(stderr,
br'address : [0-9a-fA-Fx]+')
br'object address : ' + address_regex)
self.assertRegex(stderr,
br'object refcount : 1')
self.assertRegex(stderr,
br'object type : ' + address_regex)
self.assertRegex(stderr,
br'object type name: list')
self.assertRegex(stderr,
br'object repr : \[1, 2, 3\]')
class GCTogglingTests(unittest.TestCase):