ENH: Disable the alloc cache under address and memory sanitizers #29006
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We've been carrying a variant of this patch in our local copy of NumPy for some time. The alloc cache reduces the effectiveness of use-after-free or use-of-uninitialized memory warnings because caching of allocations means they may be reused for a different allocation, potentially hiding real problems.
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Seems reasonable to me. @ngoldbaum Thoughts? |
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Seems reasonable to me as well. |
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Thanks @hawkinsp . |
seberg
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May 23, 2025
numpygh-29006 got the branching wrong leaving the cache undefined on most GCC/clang, which means we wouldn't use it. Also move it up so that we can just remove the unused globals entirely.
seberg
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May 23, 2025
numpygh-29006 got the branching wrong leaving the cache undefined on most GCC/clang, which means we wouldn't use it. Also move it up so that we can just remove the unused globals entirely.
charris
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May 23, 2025
numpygh-29006 got the branching wrong leaving the cache undefined on most GCC/clang, which means we wouldn't use it. Also move it up so that we can just remove the unused globals entirely.
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We've been carrying a variant of this patch in our local copy of NumPy for some time.
The alloc cache reduces the effectiveness of use-after-free or use-of-uninitialized memory warnings because caching of allocations means they may be reused for a different allocation, potentially hiding real problems.