Remove runtime::set_thread_name, which is obviated by `thread::set_…

…name`. (#952)

src/backend/linux_raw/runtime/syscalls.rs

@@ -8,9 +8,11 @@
 use crate::backend::c;
 #[cfg(target_arch = "x86")]
 use crate::backend::conv::by_mut;
+#[cfg(target_arch = "x86_64")]
+use crate::backend::conv::c_uint;
 use crate::backend::conv::{
-    by_ref, c_int, c_uint, ret, ret_c_int, ret_c_int_infallible, ret_error, ret_infallible,
-    ret_void_star, size_of, zero,
+    by_ref, c_int, ret, ret_c_int, ret_c_int_infallible, ret_error, ret_infallible, ret_void_star,
+    size_of, zero,
 };
 #[cfg(feature = "fs")]
 use crate::fd::BorrowedFd;
@@ -30,7 +32,6 @@ use linux_raw_sys::general::__kernel_old_timespec;
 use linux_raw_sys::general::kernel_sigset_t;
 #[cfg(target_arch = "x86_64")]
 use linux_raw_sys::general::ARCH_SET_FS;
-use linux_raw_sys::prctl::PR_SET_NAME;
 
 #[inline]
 pub(crate) unsafe fn fork() -> io::Result<Fork> {
@@ -139,18 +140,6 @@ pub(crate) mod tls {
         Pid::from_raw_unchecked(tid)
     }
 
-    #[inline]
-    pub(crate) unsafe fn set_thread_name(name: &CStr) -> io::Result<()> {
-        ret(syscall_readonly!(
-            __NR_prctl,
-            c_uint(PR_SET_NAME),
-            name,
-            zero(),
-            zero(),
-            zero()
-        ))
-    }
-
     #[inline]
     pub(crate) fn exit_thread(code: c::c_int) -> ! {
         unsafe { syscall_noreturn!(__NR_exit, c_int(code)) }

src/runtime.rs

@@ -112,22 +112,6 @@ pub unsafe fn set_tid_address(data: *mut c_void) -> Pid {
     backend::runtime::syscalls::tls::set_tid_address(data)
 }
 
-/// `prctl(PR_SET_NAME, name)`
-///
-/// # References
-///  - [Linux]
-///
-/// # Safety
-///
-/// This is a very low-level feature for implementing threading libraries.
-/// See the references links above.
-///
-/// [Linux]: https://man7.org/linux/man-pages/man2/prctl.2.html
-#[inline]
-pub unsafe fn set_thread_name(name: &CStr) -> io::Result<()> {
-    backend::runtime::syscalls::tls::set_thread_name(name)
-}
-
 #[cfg(linux_raw)]
 #[cfg(target_arch = "x86")]
 pub use backend::runtime::tls::UserDesc;