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GeezerVison is showing github.com — Implement PEP 831 – Frame Pointers Everywhere: Enabling System-Level Observability for Python · Issue #149202 · python/cpython

Implement PEP 831 – Frame Pointers Everywhere: Enabling System-Level Observability for Python #149202

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Implement PEP 831 – Frame Pointers Everywhere: Enabling System-Level Observability for Python#149202
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3.15bugs and security fixesbugs and security fixesbuildThe build process and cross-buildThe build process and cross-buildtype-featureA feature request or enhancementA feature request or enhancement

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@pablogsal
pablogsal
opened on Apr 30, 2026
Issue body actions

Linked PRs

  • gh-149202: Implement PEP 831 – Frame Pointers Everywhere: Enabling System-Level Observability for Python #149201
  • gh-149202: Fix frame pointer unwinding on s390x and ARM #149362
  • gh-149202: Highlight PEP 831 in What's New for Python 3.15 #149390
  • gh-149202: Fix frame pointer unwinding on ppc64le and armv7/clang #149409
  • gh-149202: Don't use -fno-omit-frame-pointer on ppc64le #149485

Activity

  1. StanFromIreland
    added
    type-featureA feature request or enhancementA feature request or enhancement
    buildThe build process and cross-buildThe build process and cross-build
    3.15bugs and security fixesbugs and security fixes
    on May 1, 2026
  2. pablogsal
    added a commit that references this issue on May 1, 2026

    gh-149202: Implement PEP 831 – Frame Pointers Everywhere: Enabling Sy…

    3236773

  3. hugovk commented on May 2, 2026

    @hugovk
    hugovk
    on May 2, 2026
    Member
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    Done in #149201 🚀

  4. hugovk
    closed this as completedon May 2, 2026
  5. pablogsal
    added 6 commits that reference this issue on May 4, 2026

    pythongh-149202: Fix frame pointer unwinding on s390x and ARM

    ceac02f

    pythongh-149202: Fix frame pointer unwinding on s390x and ARM

    87aa290

    pythongh-149202: Fix frame pointer unwinding on s390x and ARM

    ef67c5d

    pythongh-149202: Fix frame pointer unwinding on s390x and ARM

    c68855d

    pythongh-149202: Highlight PEP 831 in What's New for Python 3.15

    8f371ca

    gh-149202: Highlight PEP 831 in What's New for Python 3.15 (#149390)

    88844d2
  6. encukou
    added 2 commits that reference this issue on May 6, 2026

    gh-149202: Fix frame pointer unwinding on s390x and ARM (GH-149362)

    4ed4014

    gh-149202: Fix frame pointer unwinding on ppc64le and armv7/clang (#1…

    612140e
  7. vstinner
    added a commit that references this issue on May 7, 2026

    pythongh-149202: Don't use -fno-omit-frame-pointer on ppc64le

    ea140bb

  8. encukou commented on May 7, 2026

    @encukou
    encukou
    on May 7, 2026
    Member
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    We can fix this on unstable buildbots too:

    • SPARC: https://cseweb.ucsd.edu/~gbournou/CSE131/sparcstack.html
    • RISC-V: https://riscv-programming.org/ale-exercise-book/book/ch08-03-stack-and-frame-pointers.html#stack-and-frame-pointers

    Given that most architectures need to tweak FRAME_POINTER_NEXT_OFFSET & FRAME_POINTER_RETURN_OFFSET, and it looks like those are the only things that need tweaking, would it make sense to set them in configure/pyconfig.h, like _Py_STACK_GROWS_DOWN?

  9. vstinner
    added a commit that references this issue on May 7, 2026

    gh-149202: Don't use -fno-omit-frame-pointer on ppc64le (#149485)

    b3cfd36
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