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std: truncate thread names on NetBSD #158399

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Merged
rust-bors merged 1 commit into from
Jun 27, 2026
Merged

std: truncate thread names on NetBSD #158399

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6 changes: 6 additions & 0 deletions library/std/src/sys/thread/unix.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -392,6 +392,7 @@ pub fn current_os_id() -> Option<u64> {
target_os = "vxworks",
target_os = "cygwin",
target_vendor = "apple",
target_os = "netbsd",
))]
fn truncate_cstr<const MAX_WITH_NUL: usize>(cstr: &CStr) -> [libc::c_char; MAX_WITH_NUL] {
let mut result = [0; MAX_WITH_NUL];
Expand Down Expand Up @@ -463,7 +464,12 @@ pub fn set_name(name: &CStr) {

#[cfg(target_os = "netbsd")]
pub fn set_name(name: &CStr) {
// See https://github.com/NetBSD/src/blob/8d40872b4c550a802379f3b9c22a40212d5e149d/lib/libpthread/pthread.h#L281
// FIXME: move to libc.
const PTHREAD_MAX_NAMELEN_NP: usize = 32;

unsafe {
let name = truncate_cstr::<{ PTHREAD_MAX_NAMELEN_NP }>(name);
let res = libc::pthread_setname_np(
libc::pthread_self(),
c"%s".as_ptr(),
Expand Down
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