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Posted to github@arrow.apache.org by "pablogsal (via GitHub)" <gi...@apache.org> on 2026/05/24 14:00:57 UTC

[PR] Expose mimalloc allocations for profiler interposition [arrow]

pablogsal opened a new pull request, #50029:
URL: https://github.com/apache/arrow/pull/50029

   Memory profilers like memray couldn't track Arrow's mimalloc allocations because mimalloc is statically linked into libarrow.so and internal calls bypass PLT. This adds weak exported wrapper functions (arrow_mimalloc_allocate, arrow_mimalloc_reallocate, arrow_mimalloc_free) that route through PLT even for intra-DSO calls, enabling LD_PRELOAD-based interposition.
   
   Includes a test that verifies the interposition mechanism works by preloading a tracking library and checking allocation counts.
   
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Re: [PR] Expose mimalloc allocations for profiler interposition [arrow]

Posted by "pablogsal (via GitHub)" <gi...@apache.org>.
pablogsal commented on PR #50029:
URL: https://github.com/apache/arrow/pull/50029#issuecomment-4529112694

   Ah i was not aware of https://github.com/apache/arrow/pull/41128 @pitrou do yo think you can resurrect that PR, with that we can add memray support


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Re: [PR] Expose mimalloc allocations for profiler interposition [arrow]

Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on PR #50029:
URL: https://github.com/apache/arrow/pull/50029#issuecomment-4528950583

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Re: [PR] Expose mimalloc allocations for profiler interposition [arrow]

Posted by "pablogsal (via GitHub)" <gi...@apache.org>.
pablogsal closed pull request #50029: Expose mimalloc allocations for profiler interposition
URL: https://github.com/apache/arrow/pull/50029


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