Skip to content

[3.11] gh-98178: syslog() is not thread-safe on macOS (GH-98213) #98237

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Oct 13, 2022
Merged

[3.11] gh-98178: syslog() is not thread-safe on macOS (GH-98213) #98237

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions Misc/NEWS.d/next/Library/2022-10-12-10-00-40.gh-issue-98178.hspH51.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
On macOS, fix a crash in :func:`syslog.syslog` in multi-threaded applications.
On macOS, the libc ``syslog()`` function is not thread-safe, so
:func:`syslog.syslog` no longer releases the GIL to call it. Patch by Victor
Stinner.
5 changes: 5 additions & 0 deletions Modules/syslogmodule.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -207,9 +207,14 @@ syslog_syslog(PyObject * self, PyObject * args)
*/
PyObject *ident = S_ident_o;
Py_XINCREF(ident);
#ifdef __APPLE__
// gh-98178: On macOS, libc syslog() is not thread-safe
syslog(priority, "%s", message);
#else
Py_BEGIN_ALLOW_THREADS;
syslog(priority, "%s", message);
Py_END_ALLOW_THREADS;
#endif
Py_XDECREF(ident);
Py_RETURN_NONE;
}
Expand Down