3 ms·

Thanks you and your parent for pointing this out! I should be more precise, sbrk is the underlying system call that might be invoked inside malloc

• voldacar 6y ago
  mmap usually these days
• fanf2 6y ago
  Yes, and often mmap() for large allocations and other parts of the heap. There has been an interesting discussion about memory management in Ritchie’s PDP11 C compiler on the TUHS list this month https://minnie.tuhs.org/pipermail/tuhs/2020-August/thread.html https://minnie.tuhs.org/pipermail/tuhs/2020-August/thread.ht... from the era when large programs could not necessarily afford the overhead of malloc() so sometimes used sbrk() directly.