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| author | Victor Stinner <vstinner@python.org> | 2021-09-07 13:42:11 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-09-07 13:42:11 (GMT) |
| commit | fb305092a5d7894b41f122c1a1117b3abf4c567e (patch) | |
| tree | baaf648325e8226eccbd54b702b2f0e08c616237 /Misc | |
| parent | 979336de34e3d3f40cf6e666b72a618f6330f3c1 (diff) | |
| download | cpython-fb305092a5d7894b41f122c1a1117b3abf4c567e.zip cpython-fb305092a5d7894b41f122c1a1117b3abf4c567e.tar.gz cpython-fb305092a5d7894b41f122c1a1117b3abf4c567e.tar.bz2 | |
bpo-44348: BaseException deallocator uses trashcan (GH-28190)
The deallocator function of the BaseException type now uses the
trashcan mecanism to prevent stack overflow. For example, when a
RecursionError instance is raised, it can be linked to another
RecursionError through the __context__ attribute or the __traceback__
attribute, and then a chain of exceptions is created. When the chain
is destroyed, nested deallocator function calls can crash with a
stack overflow if the chain is too long compared to the available
stack memory.
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2021-09-07-00-21-04.bpo-44348.f8w_Td.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2021-09-07-00-21-04.bpo-44348.f8w_Td.rst b/Misc/NEWS.d/next/Core and Builtins/2021-09-07-00-21-04.bpo-44348.f8w_Td.rst new file mode 100644 index 0000000..c222a07 --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2021-09-07-00-21-04.bpo-44348.f8w_Td.rst @@ -0,0 +1,8 @@ +The deallocator function of the :exc:`BaseException` type now uses the +trashcan mecanism to prevent stack overflow. For example, when a +:exc:`RecursionError` instance is raised, it can be linked to another +RecursionError through the ``__context__`` attribute or the +``__traceback__`` attribute, and then a chain of exceptions is created. When +the chain is destroyed, nested deallocator function calls can crash with a +stack overflow if the chain is too long compared to the available stack +memory. Patch by Victor Stinner. |