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GeezerVison is showing github.com — signalmodule.c uses _PyErr_WriteUnraisableMsg() by vstinner · Pull Request #98217 · python/cpython

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@vstinner

@vstinner vstinner commented Oct 12, 2022

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Signal wakeup fd errors are now logged with
_PyErr_WriteUnraisableMsg(), rather than PySys_WriteStderr() and PyErr_WriteUnraisable(), to pass the error message to sys.unraisablehook. By default, it's still written into stderr.

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@vstinner vstinner added skip issue skip news labels Oct 12, 2022
@bedevere-bot bedevere-bot added the awaiting core review label Oct 12, 2022
@vstinner

vstinner commented Oct 12, 2022

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The change can be tested manually with:

import os
import signal

def sig_alrm(signum, frame):
    print("here")

if True:
    with open(__file__) as fp:
        fd = fp.fileno()
        os.set_blocking(fd, False)
        signal.set_wakeup_fd(fd)
    # fd becomes a bad file descriptor
else:
    a,b=os.pipe()
    os.set_blocking(fd, False)
    fd = a
    signal.set_wakeup_fd(fd)

signal.signal(signal.SIGALRM, sig_alrm)
signal.raise_signal(signal.SIGALRM)
print("exit")
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@vstinner
signalmodule.c uses _PyErr_WriteUnraisableMsg()
f12bddd 
Signal wakeup fd errors are now logged with
_PyErr_WriteUnraisableMsg(), rather than PySys_WriteStderr() and
PyErr_WriteUnraisable(), to pass the error message to
sys.unraisablehook. By default, it's still written into stderr.
@vstinner
vstinner merged commit 342b115 into python:main Oct 12, 2022
@bedevere-bot bedevere-bot removed the awaiting core review label Oct 12, 2022
@vstinner
vstinner deleted the unraisable branch October 12, 2022 15:27
carljm added a commit to carljm/cpython that referenced this pull request Oct 14, 2022
@carljm
Merge branch 'main' into typewatch
6e53514 
* main: (38 commits)
  pythongh-98251: Allow venv to pass along PYTHON* variables to pip and ensurepip when they do not impact path resolution (pythonGH-98259)
  Bpo-41246: IOCP Proactor avoid callback code duplication (python#21399)
  bpo-46364: Use sockets for stdin of asyncio only on AIX (python#30596)
  pythongh-98178: syslog() is not thread-safe on macOS (python#98213)
  Mark all targets in `Doc/Makefile` as `PHONY` (pythonGH-98189)
  pythongh-97982: Factorize PyUnicode_Count() and unicode_count() code (python#98025)
  pythongh-96265: Formatting changes for faq/general (python#98129)
  tutorial: remove "with single quotes" (python#98204)
  pythongh-97669: Remove Tools/scripts/startuptime.py (python#98214)
  signalmodule.c uses _PyErr_WriteUnraisableMsg() (python#98217)
  pythongh-97669: Fix test_tools reference leak (python#98216)
  pythongh-97669: Create Tools/patchcheck/ directory (python#98186)
  pythongh-65046: Link to logging cookbook from asyncio docs (python#98207)
  Formatting fixes in contextlib docs (python#98111)
  pythongh-95276: Add callable entry to the glossary (python#95738)
  pythongh-96130: Rephrase use of "typecheck" verb for clarity (python#98144)
  Fix some incorrect indentation around the main switch (python#98177)
  pythongh-98172: Fix formatting in `except*` docs (python#98173)
  pythongh-97982: Remove asciilib_count() (python#98164)
  pythongh-95756: Free and NULL-out code caches when needed (pythonGH-98181)
  ...
carljm added a commit to carljm/cpython that referenced this pull request Oct 14, 2022
@carljm
Merge branch 'main' into cached_property
0bb0c69 
* main: (37 commits)
  pythongh-98251: Allow venv to pass along PYTHON* variables to pip and ensurepip when they do not impact path resolution (pythonGH-98259)
  Bpo-41246: IOCP Proactor avoid callback code duplication (python#21399)
  bpo-46364: Use sockets for stdin of asyncio only on AIX (python#30596)
  pythongh-98178: syslog() is not thread-safe on macOS (python#98213)
  Mark all targets in `Doc/Makefile` as `PHONY` (pythonGH-98189)
  pythongh-97982: Factorize PyUnicode_Count() and unicode_count() code (python#98025)
  pythongh-96265: Formatting changes for faq/general (python#98129)
  tutorial: remove "with single quotes" (python#98204)
  pythongh-97669: Remove Tools/scripts/startuptime.py (python#98214)
  signalmodule.c uses _PyErr_WriteUnraisableMsg() (python#98217)
  pythongh-97669: Fix test_tools reference leak (python#98216)
  pythongh-97669: Create Tools/patchcheck/ directory (python#98186)
  pythongh-65046: Link to logging cookbook from asyncio docs (python#98207)
  Formatting fixes in contextlib docs (python#98111)
  pythongh-95276: Add callable entry to the glossary (python#95738)
  pythongh-96130: Rephrase use of "typecheck" verb for clarity (python#98144)
  Fix some incorrect indentation around the main switch (python#98177)
  pythongh-98172: Fix formatting in `except*` docs (python#98173)
  pythongh-97982: Remove asciilib_count() (python#98164)
  pythongh-95756: Free and NULL-out code caches when needed (pythonGH-98181)
  ...
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@vstinner @bedevere-bot
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