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sched_setaffinity: adjust test on BE systems

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Folkert 2024-07-06 14:06:07 +02:00
parent 46019523e8
commit d65e3688df
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1 changed files with 7 additions and 2 deletions
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9
src/tools/miri/tests/pass-dep/libc/libc-affinity.rs
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@ -116,8 +116,13 @@ fn set_small_cpu_mask() {
assert_eq!(err, -1);
assert_eq!(std::io::Error::last_os_error().kind(), std::io::ErrorKind::InvalidInput);
// any other number of bytes (at least up to `size_of<cpu_set_t>()` will work
for i in 1..24 {
// on LE systems, any other number of bytes (at least up to `size_of<cpu_set_t>()`) will work.
// on BE systems the CPUs 0..8 are stored in the right-most byte of the first chunk. If that
// byte is not included, no valid CPUs are configured. We skip those cases.
let cpu_zero_included_length =
if cfg!(target_endian = "little") { 1 } else { core::mem::size_of::<std::ffi::c_ulong>() };
for i in cpu_zero_included_length..24 {
let err = unsafe { sched_setaffinity(PID, i, &cpuset) };
assert_eq!(err, 0, "fail for {i}");
}