gh-111777: Fix assertion errors on incorrectly still-tracked GC object destruction (GH-111778)
In PyObject_GC_Del, in Py_DEBUG mode, when warning about GC objects that
were not properly untracked before starting destruction, take care to
untrack the object _before_ warning, to avoid triggering a GC run and
causing the problem the code tries to warn about. Also make sure to save and
restore any pending exceptions, which the warning would otherwise clobber or
trigger an assertion error on.
(cherry picked from commit ce6a533c4b)
Co-authored-by: T. Wouters <thomas@python.org>
Fix undefined behaviour in datetime.time.fromisoformat() (GH-111982)
Fix undefined behaviour in datetime.time.fromisoformat() when parsing a string without a timezone. 'tzoffset' is not assigned to by parse_isoformat_time if it returns 0, but time_fromisoformat then passes tzoffset to another function, which is undefined behaviour (even if the function in question does not use the value).
(cherry picked from commit 21615f77b5)
Co-authored-by: T. Wouters <thomas@python.org>
* [3.12] gh-110395: invalidate open kqueues after fork (GH-110517)
Invalidate open select.kqueue instances after fork as the fd will be invalid in the child.
(cherry picked from commit a6c1c04d4d)
Co-authored-by: Davide Rizzo <sorcio@gmail.com>
* move assert to after the child dying
this is in `main` via https://github.com/python/cpython/pull/111816/files
GH-111804: Drop posix.fallocate() under WASI (GH-111869)
Drop posix.fallocate() under WASI.
The underlying POSIX function, posix_fallocate(), was found to vary too
much between implementations to remain in WASI. As such, while it was
available in WASI preview1, it's been dropped in preview2.
gh-101180: Fix a bug where iso2022_jp_3 and iso2022_jp_2004 codecs read out of bounds (gh-111695)
(cherry picked from commit c8faa3568a)
Co-authored-by: Masayuki Moriyama <masayuki.moriyama@miraclelinux.com>
* Move existing tests for PySys_GetObject() and PySys_SetObject() into
specialized files.
* Add test for PySys_GetXOptions() using _testcapi.
* Add tests for PySys_FormatStdout(), PySys_FormatStderr(),
PySys_WriteStdout() and PySys_WriteStderr() using ctypes.
(cherry picked from commit b2ba298527)
zipinfo now supports the full range of values in the TZ string
determined by RFC 8536 and detects all invalid formats.
Both Python and C implementations now raise exceptions of the same
type on invalid data.
(cherry picked from commit ab08ff7882)
Now re.error is raised instead of OverflowError or RuntimeError for
too large width of look-behind pattern.
The limit is increased to 2**32-1 (was 2**31-1).
(cherry picked from commit e2b3d831fd)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
TypeError would be overwritten by OverflowError
if 'code' param contained non-ints.
(cherry picked from commit 344d3a222a)
Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
* gh-108987: Fix _thread.start_new_thread() race condition (#109135)
Fix _thread.start_new_thread() race condition. If a thread is created
during Python finalization, the newly spawned thread now exits
immediately instead of trying to access freed memory and lead to a
crash.
thread_run() calls PyEval_AcquireThread() which checks if the thread
must exit. The problem was that tstate was dereferenced earlier in
_PyThreadState_Bind() which leads to a crash most of the time.
Move _PyThreadState_CheckConsistency() from thread_run() to
_PyThreadState_Bind().
(cherry picked from commit 517cd82ea7)
* gh-109795: `_thread.start_new_thread`: allocate thread bootstate using raw memory allocator (#109808)
(cherry picked from commit 1b8f2366b3)
---------
Co-authored-by: Radislav Chugunov <52372310+chgnrdv@users.noreply.github.com>
gh-110052: Fix faulthandler for freed tstate (#110069)
faulthandler now detected freed interp and freed tstate, and no
longer dereference them.
(cherry picked from commit 2e37a38bcb)
gh-109098: Fuzz re module instead of internal sre (GH-109911)
* gh-109098: Fuzz re module instead of internal sre
* Fix c-analyzer globals test failure
* Put globals exception in ignored.tsv
(cherry picked from commit a829356f86)
Co-authored-by: Ammar Askar <ammar@ammaraskar.com>
gh-109631: Allow interruption of short repeated regex matches (GH-109867)
Counting for signal checking now continues in new match from the point where
it ended in the previous match instead of starting from 0.
(cherry picked from commit 8ac2085b80)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
gh-109613: _pystat_fromstructstat() checks for exceptions (GH-109618)
Fix os.stat() and os.DirEntry.stat(): check for exceptions.
Previously, on Python built in debug mode, these functions could
trigger a fatal Python error (and abort the process) when a function
succeeded with an exception set.
_pystat_fromstructstat() now exits immediately if an exception is
raised, rather only checking for exceptions at the end. It fix
following fatal error in fill_time():
Fatal Python error: _Py_CheckSlotResult:
Slot * of type int succeeded with an exception set
(cherry picked from commit d4cea794a7)
Co-authored-by: Victor Stinner <vstinner@python.org>
gh-104690: thread_run() checks for tstate dangling pointer (#109056)
thread_run() of _threadmodule.c now calls
_PyThreadState_CheckConsistency() to check if tstate is a dangling
pointer when Python is built in debug mode.
Rename ceval_gil.c is_tstate_valid() to
_PyThreadState_CheckConsistency() to reuse it in _threadmodule.c.
(cherry picked from commit f63d37877a)
gh-109496: Detect Py_DECREF() after dealloc in debug mode (GH-109539)
On a Python built in debug mode, Py_DECREF() now calls
_Py_NegativeRefcount() if the object is a dangling pointer to
deallocated memory: memory filled with 0xDD "dead byte" by the debug
hook on memory allocators. The fix is to check the reference count
*before* checking for _Py_IsImmortal().
Add test_decref_freed_object() to test_capi.test_misc.
(cherry picked from commit 0bb0d88e2d)
Co-authored-by: Victor Stinner <vstinner@python.org>
Add Modules/_testcapi/util.h header (GH-108774)
It contains common macros used in C API tests.
(cherry picked from commit 0e01fac315)
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
(cherry picked from commit 8178a88bd8)
- Add param docstrings
- Link to os.SEEK_* constants
- Mention the return value in the initial paragraph
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
