8000 gh-130019: Fix data race in _PyType_AllocNoTrack by colesbury · Pull Request #130058 · python/cpython · GitHub
[go: up one dir, main page]
Skip to content

gh-130019: Fix data race in _PyType_AllocNoTrack #130058

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 2 commits into from
Feb 13, 2025
Merged

gh-130019: Fix data race in _PyType_AllocNoTrack #130058

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
78e40c8
gh-130019: Fix data race in _PyType_AllocNoTrack
colesbury Feb 12, 2025
7131774
Update Objects/typeobject.c
colesbury Feb 13, 2025
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: 3 additions & 1 deletion Objects/typeobject.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2251,7 +2251,9 @@ _PyType_AllocNoTrack(PyTypeObject *type, Py_ssize_t nitems)
if (PyType_IS_GC(type)) {
_PyObject_GC_Link(obj);
}
memset(obj, '\0', size);
// Zero out the object after the PyObject header. The header fields are
// initialized by _PyObject_Init[Var]().
memset((char *)obj + sizeof(PyObject), 0, size - sizeof(PyObject));

if (type->tp_itemsize == 0) {
_PyObject_Init(obj, type);
Expand Down
5 changes: 3 additions & 2 deletions Python/gc.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2309,11 +2309,12 @@ PyObject *
PyUnstable_Object_GC_NewWithExtraData(PyTypeObject *tp, size_t extra_size)
{
size_t presize = _PyType_PreHeaderSize(tp);
PyObject *op = gc_alloc(tp, _PyObject_SIZE(tp) + extra_size, presize);
size_t size = _PyObject_SIZE(tp) + extra_size;
PyObject *op = gc_alloc(tp, size, presize);
if (op == NULL) {
return NULL;
}
memset(op, 0, _PyObject_SIZE(tp) + extra_size);
memset((char *)op + sizeof(PyObject), 0, size - sizeof(PyObject));
_PyObject_Init(op, tp);
return op;
}
Expand Down
5 changes: 3 additions & 2 deletions Python/gc_free_threading.c
View file
Open in desktop
63A4
Original file line number Diff line number Diff line change
Expand Up @@ -2593,11 +2593,12 @@ PyObject *
PyUnstable_Object_GC_NewWithExtraData(PyTypeObject *tp, size_t extra_size)
{
size_t presize = _PyType_PreHeaderSize(tp);
PyObject *op = gc_alloc(tp, _PyObject_SIZE(tp) + extra_size, presize);
size_t size = _PyObject_SIZE(tp) + extra_size;
PyObject *op = gc_alloc(tp, size, presize);
if (op == NULL) {
return NULL;
}
memset(op, 0, _PyObject_SIZE(tp) + extra_size);
memset((char *)op + sizeof(PyObject), 0, size - sizeof(PyObject));
_PyObject_Init(op, tp);
return op;
}
Expand Down
Loading
0