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GH-120754: Make PY_READ_MAX smaller than max byteobject size#121633
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cmaloney wants to merge 4 commits into
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GH-120754: Make PY_READ_MAX smaller than max byteobject size#121633cmaloney wants to merge 4 commits into
cmaloney wants to merge 4 commits into
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Currently if code tries to do a os.read larger than the max bytes object length, the size to read gets capped to `_PY_READ_MAX`, then the code tries to allocate a PyBytes which fails with an OverflowError as the size is larger than the max py bytes object. Since os.read is capping the max size anyways, cap it to a size which is always allocatable as a PyBytes. This changes behavior from bpo-21932 and enables the large file os.read test on 32 bit platforms, as it should cap the read to a platform acceptable size.
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cmaloney
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Jul 15, 2024
cmaloney
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Jul 17, 2024
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Currently if code tries to do a os.read larger than the max bytes object length, the size to read gets capped to
_PY_READ_MAX, then the code tries to allocate a PyBytes which fails with an OverflowError as the size is longer than what is allocatable.Since os.read is capping the max size anyways, cap it to a size which is always allocatable as a PyBytes.
This changes behavior from bpo-21932 and enables the large file os.read test on 32 bit platforms, as it should cap the read to a platform acceptable size.