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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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10
Include/unicodeobject.h
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@ -1032,16 +1032,6 @@ PyAPI_FUNC(int) PyUnicode_IsIdentifier(PyObject *s);
/* === Characters Type APIs =============================================== */
#if defined(Py_DEBUG) && !defined(Py_LIMITED_API)
PyAPI_FUNC(int) _PyUnicode_CheckConsistency(
PyObject *op,
int check_content);
#elif !defined(NDEBUG)
/* For asserts that call _PyUnicode_CheckConsistency(), which would
* otherwise be a problem when building with asserts but without Py_DEBUG. */
#define _PyUnicode_CheckConsistency(op, check_content) PyUnicode_Check(op)
#endif
#ifndef Py_LIMITED_API
# define Py_CPYTHON_UNICODEOBJECT_H
# include "cpython/unicodeobject.h"