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GeezerVison is showing github.com — Fix refleak tracking in free-threaded build · Issue #115184 · python/cpython

Fix refleak tracking in free-threaded build #115184

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Fix refleak tracking in free-threaded build#115184
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colesbury
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3.13only security fixesonly security fixestopic-free-threadingtype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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@colesbury
colesbury
opened on Feb 8, 2024
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Bug report

There are a few bugs with refleak tracking in the free-threaded build uncovered in #114824:

  • We should account for blocks in abandoned segments
  • We should stop-the-world before traversing mimalloc heaps in case there are still other threads running
  • The mimalloc heap and segment traversal must call _mi_page_free_collect(page, true); to properly account for blocks that were deferred freed by other threads. We need to call this earlier than we currently do (before computing page stats).
  • _Py_DecRefSharedDebug was missing a _Py_IncRefTotal

Linked PRs

  • gh-115184: Fix refleak tracking issues in free-threaded build #115188

Activity

  1. colesbury
    added
    type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error
    3.13only security fixesonly security fixes
    topic-free-threading
    on Feb 8, 2024
  2. colesbury
    self-assigned this
    on Feb 8, 2024
  3. colesbury
    added 2 commits that reference this issue on Feb 8, 2024

    pythongh-115184: Fix refleak tracking issues in free-threaded build

    1b17640

    gh-115184: Fix refleak tracking issues in free-threaded build (#115188)

    31633f4
  4. colesbury
    closed this as completedon Feb 9, 2024
  5. fsc-eriker
    added a commit that references this issue on Feb 14, 2024

    pythongh-115184: Fix refleak tracking issues in free-threaded build (p…

    000f444
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  • @colesbury
    colesbury

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3.13only security fixesonly security fixestopic-free-threadingtype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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