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gh-123022: Fix crash with Py_Initialize in background thread - #123052
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Check that the current default heap is initialized in `_mi_os_get_aligned_hint` and `mi_os_claim_huge_pages`. The mimalloc function `_mi_os_get_aligned_hint` assumes that there is an initialized default heap. This is true for our main thread, but not for background threads. The problematic code path is usually called during initialization (i.e., `Py_Initialize`), but it may also be called if the program allocates large amounts of memory in total. The crash only affected the free-threaded build.
colesbury
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needs backport to 3.13
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@Yhg1s - I think it's worth considering this for 3.13rc2. Let me know what you think. |
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Yeah, this should go into rc2. |
Yhg1s
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Aug 17, 2024
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Thanks @colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13. |
miss-islington
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…ythonGH-123052) Check that the current default heap is initialized in `_mi_os_get_aligned_hint` and `mi_os_claim_huge_pages`. The mimalloc function `_mi_os_get_aligned_hint` assumes that there is an initialized default heap. This is true for our main thread, but not for background threads. The problematic code path is usually called during initialization (i.e., `Py_Initialize`), but it may also be called if the program allocates large amounts of memory in total. The crash only affected the free-threaded build. (cherry picked from commit d061ffe) Co-authored-by: Sam Gross <colesbury@gmail.com>
colesbury
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…GH-123052) (#123114) Check that the current default heap is initialized in `_mi_os_get_aligned_hint` and `mi_os_claim_huge_pages`. The mimalloc function `_mi_os_get_aligned_hint` assumes that there is an initialized default heap. This is true for our main thread, but not for background threads. The problematic code path is usually called during initialization (i.e., `Py_Initialize`), but it may also be called if the program allocates large amounts of memory in total. The crash only affected the free-threaded build. (cherry picked from commit d061ffe) Co-authored-by: Sam Gross <colesbury@gmail.com>
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Aug 19, 2024
…ython#123052) Check that the current default heap is initialized in `_mi_os_get_aligned_hint` and `mi_os_claim_huge_pages`. The mimalloc function `_mi_os_get_aligned_hint` assumes that there is an initialized default heap. This is true for our main thread, but not for background threads. The problematic code path is usually called during initialization (i.e., `Py_Initialize`), but it may also be called if the program allocates large amounts of memory in total. The crash only affected the free-threaded build.
blhsing
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Aug 22, 2024
…ython#123052) Check that the current default heap is initialized in `_mi_os_get_aligned_hint` and `mi_os_claim_huge_pages`. The mimalloc function `_mi_os_get_aligned_hint` assumes that there is an initialized default heap. This is true for our main thread, but not for background threads. The problematic code path is usually called during initialization (i.e., `Py_Initialize`), but it may also be called if the program allocates large amounts of memory in total. The crash only affected the free-threaded build.
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Check that the current default heap is initialized in
_mi_os_get_aligned_hintandmi_os_claim_huge_pages.The mimalloc function
_mi_os_get_aligned_hintassumes that there is an initialized default heap. This is true for our main thread, but not for background threads. The problematic code path is usually called during initialization (i.e.,Py_Initialize), but it may also be called if the program allocates large amounts of memory in total.The crash only affected the free-threaded build.
Py_Initializein non-main thread in free-threading build #123022