delta/cpython-git.git/Objects/object.c, branch fix-misc-acks

bpo-36745: Fix a possible reference leak in PyObject_SetAttr() (GH-12993)

2019-04-28T13:17:40+00:00

https://bugs.python.org/issue36745
(cherry picked from commit e0dcb85b7d64153d1741698c04a6736c9669603a)

Co-authored-by: Zackery Spytz

[3.7] bpo-36389: _PyObject_IsFreed() now also detects uninitialized memory (GH-12770) (GH-12788)

2019-04-11T20:30:31+00:00

* bpo-36389: _PyObject_IsFreed() now also detects uninitialized memory (GH-12770)

Replace _PyMem_IsFreed() function with _PyMem_IsPtrFreed() inline
function. The function is now way more efficient, it became a simple
comparison on integers, rather than a short loop. It detects also
uninitialized bytes and "forbidden bytes" filled by debug hooks
on memory allocators.

Add unit tests on _PyObject_IsFreed().

(cherry picked from commit 2b00db68554422ec37faba2a80179a0172df6349)

* bpo-36389: Change PyMem_SetupDebugHooks() constants (GH-12782)

Modify CLEANBYTE, DEADDYTE and FORBIDDENBYTE constants: use 0xCD,
0xDD and 0xFD, rather than 0xCB, 0xBB and 0xFB, to use the same byte
patterns than Windows CRT debug malloc() and free().

(cherry picked from commit 4c409beb4c360a73d054f37807d3daad58d1b567)

[3.7] bpo-9263: _PyObject_Dump() detects freed memory (GH-10061) (GH-10662)

2018-11-22T16:15:37+00:00

* bpo-9263: _PyObject_Dump() detects freed memory (GH-10061)

_PyObject_Dump() now uses an heuristic to check if the object memory
has been freed: log "" in that case.

The heuristic rely on the debug hooks on Python memory allocators
which fills the memory with DEADBYTE (0xDB) when memory is
deallocated. Use PYTHONMALLOC=debug to always enable these debug
hooks.

(cherry picked from commit 82af0b63b07aa8d92b50098e382b458143cfc677)

* bpo-9263: Fix _PyObject_Dump() for freed object (#10661)

If _PyObject_Dump() detects that the object is freed, don't try to
dump it (exit immediately).

Enhance also _PyObject_IsFreed(): it now detects if the pointer
itself looks like freed memory.

(cherry picked from commit 2cf5d32fd9e61488e8b0be55a2e92a752ba8b06b)

bpo-34910: Ensure that PyObject_Print() always returns -1 on error. (GH-9733)

2018-10-06T07:07:12+00:00

(cherry picked from commit ae62f015240c9162773341a9922794e6b960779d)

Co-authored-by: Zackery Spytz

closes bpo-32898: Fix debug build crash with COUNT_ALLOCS (GH-5800)

2018-02-22T05:44:08+00:00

(cherry picked from commit 745dc65b17b3936e3f9f4099f735f174d30c4e0c)

Co-authored-by: Eddie Elizondo

bpo-32571: Fix reading uninitialized memory (GH-5332)

2018-01-26T07:22:51+00:00

Reported by Coverity Scan.

bpo-32571: Avoid raising unneeded AttributeError and silencing it in C code (GH-5222)

2018-01-25T08:49:40+00:00

Add two new private APIs: _PyObject_LookupAttr() and _PyObject_LookupAttrId()

bpo-32436: Implement PEP 567 (#5027)

2018-01-23T00:11:18+00:00

bpo-32544: Speed up hasattr() and getattr() (GH-5173)

2018-01-16T11:52:41+00:00

AttributeError was raised always when attribute is not found.
This commit skip raising AttributeError when `tp_getattro` is `PyObject_GenericGetAttr`.
It makes hasattr() and getattr() about 4x faster when attribute is not found.

bpo-32137: The repr of deeply nested dict now raises a RecursionError (#4570)

2017-12-03T20:12:11+00:00

instead of crashing due to a stack overflow.

This perhaps will fix similar problems in other extension types.