Description

encukou

opened on Apr 29, 2025

Issue body actions

Bug report

Split out from the #111178 monster-issue:

We use the macro _Py_NO_SANITIZE_UNDEFINED to disable the UB sanitizer in some hard-to-fix cases, so that we can get a stable, regression-monitoring checker sooner.
To fully fix UBsan failures, we should get rid of the macro.
At least outside test functions.

Linked PRs

• gh-133157: remove use of _Py_NO_SANITIZE_UNDEFINED in faulthandler #134047
• gh-133157: remove usage of _Py_NO_SANITIZE_UNDEFINED in Parser/pegen.c #134048
• [3.14] gh-133157: remove usage of _Py_NO_SANITIZE_UNDEFINED in Parser/pegen.c (GH-134048) #135320
• [3.13] gh-133157: fix UBSan failures in Parser/pegen.c (GH-134048) #135334
• gh-133157: remove usage of _Py_NO_SANITIZE_UNDEFINED in pyexpat #134050
• gh-133157: remove usage of _Py_NO_SANITIZE_UNDEFINED in pyexpat #135346

Activity

1. encukou

   added

   topic-C-API

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Apr 29, 2025
2. picnixz

   self-assigned this

   on May 15, 2025
3. picnixz

   added

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   extension-modulesC modules in the Modules dirC modules in the Modules dir

   on May 15, 2025
4. picnixz

   added a commit that references this issue on May 18, 2025

   gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `faulthandl…

   0a160bf
5. pablogsal

   added a commit that references this issue on Jun 10, 2025

   gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Parser/peg…

   754e7c9
6. miss-islington

   added a commit that references this issue on Jun 10, 2025

   pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…

   b9a80b5
7. pablogsal

   added a commit that references this issue on Jun 10, 2025

   [3.14] gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Par…

   904685f
8. picnixz

   added 2 commits that reference this issue on Jun 10, 2025

   [3.13] pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` i…

   dc805f2

   [3.13] gh-133157: fix UBSan failures in `Parser/pegen.c` (GH-134048) (#…

   dd7ffdb
9. encukou

   added a commit that references this issue on Jun 10, 2025

   pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…

   d0dc245
10. lkollar

    added a commit that references this issue on Jun 19, 2025

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…

    7e3b51e
11. encukou

    added a commit that references this issue on Jul 1, 2025

    gh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyexpat` (#…

    845263a
12. encukou commented on Jul 1, 2025

    

    encukou

    on Jul 1, 2025

    MemberAuthor

    More actions

    Gone. Thank you, @picnixz!
13. encukou

    closed this as completedon Jul 1, 2025
14. AndPuQing

    added a commit that references this issue on Jul 11, 2025

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…

    c73da53
15. Pranjal095

    added 3 commits that reference this issue on Jul 12, 2025

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `faul…

    7524e25

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…

    154f4d9

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…

    ff0c21c
16. picnixz

    added a commit that references this issue on Jul 13, 2025

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…

    1aa21a7
17. taegyunkim

    added 3 commits that reference this issue on Aug 4, 2025

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `faul…

    91023f6

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…

    11dbf09

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…

    cbdf818
18. Agent-Hellboy

    added 2 commits that reference this issue on Aug 19, 2025

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `Pars…

    77d1806

    pythongh-133157: remove usage of `_Py_NO_SANITIZE_UNDEFINED` in `pyex…

    d1a9832

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