[all-commits] [llvm/llvm-project] 9ff0a4: [libc] Fix setrlimit/getrlimit on 32-bit systems

[Mikhail R. Gadelha via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9ff0a447d055a72ae4c758ef72ca2b64deefcfb7
      https://github.com/llvm/llvm-project/commit/9ff0a447d055a72ae4c758ef72ca2b64deefcfb7
  Author: Mikhail R. Gadelha <mikhail at igalia.com>
  Date:   2023-09-07 (Thu, 07 Sep 2023)

  Changed paths:
    M libc/include/llvm-libc-types/rlim_t.h

  Log Message:
  -----------
  [libc] Fix setrlimit/getrlimit on 32-bit systems

libc uses SYS_prlimit64 (which takes a struct rlimit64) to implement
setrlimt and getrlimit (which take a struct rlimit). In 64-bit bits
systems this is not an issue since the members of struct rlimit64 and
struct rlimit are 64 bits long, however, in 32-bit systems the members
of struct rlimit are only 32 bits long, causing wrong values being
passed to SYS_prlimit64.

This patch changes rlim_t to be __UINT64_TYPE__ (which also changes
rlimit as a side-effect), fixing the problem of mismatching types in
the syscall.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D159104