Commit Graph

18 Commits

Author SHA1 Message Date
Dennis Sweeney da6c78584b
gh-90667: Add specializations of Py_DECREF when types are known (GH-30872) 2022-04-19 19:02:19 +01:00
Victor Stinner e9e3eab0b8
bpo-46417: Finalize structseq types at exit (GH-30645)
Add _PyStructSequence_FiniType() and _PyStaticType_Dealloc()
functions to finalize a structseq static type in Py_Finalize().
Currrently, these functions do nothing if Python is built in release
mode.

Clear static types:

* AsyncGenHooksType: sys.set_asyncgen_hooks()
* FlagsType: sys.flags
* FloatInfoType: sys.float_info
* Hash_InfoType: sys.hash_info
* Int_InfoType: sys.int_info
* ThreadInfoType: sys.thread_info
* UnraisableHookArgsType: sys.unraisablehook
* VersionInfoType: sys.version
* WindowsVersionType: sys.getwindowsversion()
2022-01-21 01:42:25 +01:00
Irit Katriel 65e7c1f90e
bpo-46219, 46221: simplify except* implementation following exc_info changes. Move helpers to exceptions.c. Do not assume that exception groups are truthy. (GH-30289) 2022-01-02 23:22:42 +00:00
Irit Katriel 396b58345f
bpo-45711: Remove type and traceback from exc_info (GH-30122)
* Do not PUSH/POP traceback or type to the stack as part of exc_info

* Remove exc_traceback and exc_type from _PyErr_StackItem

* Add to what's new, because this change breaks things like Cython
2021-12-17 14:46:22 +00:00
Irit Katriel d60457a667
bpo-45292: [PEP-654] add except* (GH-29581) 2021-12-14 16:48:15 +00:00
Eric Snow c8749b5783
bpo-46008: Make runtime-global object/type lifecycle functions and state consistent. (gh-29998)
This change is strictly renames and moving code around.  It helps in the following ways:

* ensures type-related init functions focus strictly on one of the three aspects (state, objects, types)
* passes in PyInterpreterState * to all those functions, simplifying work on moving types/objects/state to the interpreter
* consistent naming conventions help make what's going on more clear
* keeping API related to a type in the corresponding header file makes it more obvious where to look for it

https://bugs.python.org/issue46008
2021-12-09 12:59:26 -07:00
Irit Katriel c456dfafe9
bpo-45711: use exc_value instead of exc_type to determine if exc_info is valid. Add more assertions. (GH-29627) 2021-11-25 09:41:28 +00:00
Victor Stinner 79a3148099
bpo-45061: Detect refcount bug on empty tuple singleton (GH-28503)
Detect refcount bugs in C extensions when the empty tuple singleton
is destroyed by mistake.

Add the _Py_FatalRefcountErrorFunc() function.
2021-09-21 23:04:34 +02:00
Dennis Sweeney 80a2a4ed7d
bpo-38530: Refactor and improve AttributeError suggestions (GH-25776)
- Make case-swaps half the cost of any other edit
- Refactor Levenshtein code to not use memory allocator, and to bail early on no match.
- Add comments to Levenshtein distance code
- Add test cases for Levenshtein distance behind a debug macro
- Set threshold to `(name_size + item_size + 3) * MOVE_COST / 6`.
  - Reasoning: similar to `difflib.SequenceMatcher.ratio()` >= 2/3:
```
"Multiset Jaccard similarity" >= 2/3
matching letters / total letters >= 2/3
(name_size - distance + item_size - distance) / (name_size + item_size) >= 2/3
1 - (2*distance) / (name_size + item_size) >= 2/3
1/3 >= (2*distance) / (name_size + item_size)
(name_size + item_size) / 6 >= distance
With rounding:
(name_size + item_size + 3) // 6 >= distance
```

Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
2021-05-03 16:47:27 +01:00
Pablo Galindo 37494b441a
bpo-38530: Offer suggestions on AttributeError (#16856)
When printing AttributeError, PyErr_Display will offer suggestions of similar 
attribute names in the object that the exception was raised from:

>>> collections.namedtoplo
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'collections' has no attribute 'namedtoplo'. Did you mean: namedtuple?
2021-04-14 02:36:07 +01:00
Victor Stinner 250035d134
bpo-42923: Dump extension modules on fatal error (GH-24207)
The Py_FatalError() function and the faulthandler module now dump the
list of extension modules on a fatal error.

Add _Py_DumpExtensionModules() and _PyModule_IsExtension() internal
functions.
2021-01-18 20:47:13 +01:00
Chris Jerdonek 7c30d12bd5
bpo-40696: Fix a hang that can arise after gen.throw() (GH-20287)
This updates _PyErr_ChainStackItem() to use _PyErr_SetObject()
instead of _PyErr_ChainExceptions(). This prevents a hang in
certain circumstances because _PyErr_SetObject() performs checks
to prevent cycles in the exception context chain while
_PyErr_ChainExceptions() doesn't.
2020-05-22 13:33:27 -07:00
Chris Jerdonek da742ba826
bpo-31033: Improve the traceback for cancelled asyncio tasks (GH-19951)
When an asyncio.Task is cancelled, the exception traceback now
starts with where the task was first interrupted.  Previously,
the traceback only had "depth one."
2020-05-17 22:47:31 -07:00
Victor Stinner 728189884e
bpo-38644: Pass tstate explicitly in signalmodule.c (GH-19184)
PyOS_InterruptOccurred() now checks _Py_ThreadCanHandleSignals()
before checking if SIGINT is tripped.
2020-03-26 22:28:11 +01:00
Victor Stinner d12d0e7c0f
bpo-38733: PyErr_Occurred() caller must hold the GIL (GH-17080)
bpo-3605, bpo-38733: Optimize _PyErr_Occurred(): remove "tstate ==
NULL" test.

Py_FatalError() no longer calls PyErr_Occurred() if called without
holding the GIL. So PyErr_Occurred() no longer has to support
tstate==NULL case.

_Py_CheckFunctionResult(): use directly _PyErr_Occurred() to avoid
explicit "!= NULL" test.
2019-11-07 12:42:07 +01:00
Victor Stinner 1726909094
bpo-38644: Pass tstate to _Py_CheckFunctionResult() (GH-17050)
* Add tstate parameter to _Py_CheckFunctionResult()
* Add _PyErr_FormatFromCauseTstate()
* Replace PyErr_XXX(...) with _PyErr_XXX(state, ...)
2019-11-05 01:22:12 +01:00
Victor Stinner 838f26402d
bpo-36710: Pass explicitly tstate in sysmodule.c (GH-14060)
* Replace global var Py_VerboseFlag with interp->config.verbose.
* Add _PyErr_NoMemory(tstate) function.
* Add tstate parameter to _PyEval_SetCoroutineOriginTrackingDepth()
  and move the function to the internal API.
* Replace _PySys_InitMain(runtime, interp)
  with _PySys_InitMain(runtime, tstate).
2019-06-13 22:41:23 +02:00
Victor Stinner 438a12dd9d
bpo-36710: Add tstate parameter in ceval.c (GH-13547)
* Fix a possible reference leak in _PyErr_Print() if exception
  is NULL.
* PyErr_BadInternalCall(): replace PyErr_Format() with _PyErr_SetString().
* Add pycore_pyerrors.h header file.
* New functions:

  * _PyErr_Clear()
  * _PyErr_Fetch()
  * _PyErr_Print()
  * _PyErr_Restore()
  * _PyErr_SetObject()
  * _PyErr_SetString()

* Add 'tstate' parameter to _PyEval_AddPendingCall().
2019-05-24 17:01:38 +02:00