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A comment on Writing a Memory Allocator (2019). Parent comment

Re:Writing a Memory Allocator (2019) by DmitrySoshnikov on Sunday December 13, 2020 @04:04PM (#25410266)
sbrk is emulated via mmap today on MacOS and others, this is an abstraction (for bump allocation), not just a function

you may implement custom sbrk via mmap easily

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