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linux: Use pthread_setname_np instead of prctl

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This function is available on Linux since glibc 2.12, musl 1.1.16, and
uClibc 1.0.20. The main advantage over `prctl` is that it properly
represents the pointer argument, rather than a multi-purpose `long`,
so we're better representing strict provenance (#95496).
This commit is contained in:
Josh Stone 2022-08-08 13:27:09 -07:00
parent f03ce30962
commit 013986be1b
1 changed files with 9 additions and 3 deletions
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12
library/std/src/sys/unix/thread.rs
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@ -116,11 +116,9 @@ impl Thread {
debug_assert_eq!(ret, 0);
}
#[cfg(any(target_os = "linux", target_os = "android"))]
#[cfg(target_os = "android")]
pub fn set_name(name: &CStr) {
const PR_SET_NAME: libc::c_int = 15;
// pthread wrapper only appeared in glibc 2.12, so we use syscall
// directly.
unsafe {
libc::prctl(
PR_SET_NAME,
@ -132,6 +130,14 @@ impl Thread {
}
}
#[cfg(target_os = "linux")]
pub fn set_name(name: &CStr) {
unsafe {
// Available since glibc 2.12, musl 1.1.16, and uClibc 1.0.20.
libc::pthread_setname_np(libc::pthread_self(), name.as_ptr());
}
}
#[cfg(any(target_os = "freebsd", target_os = "dragonfly", target_os = "openbsd"))]
pub fn set_name(name: &CStr) {
unsafe {