Auto merge of #56813 - oli-obk:main_🧶, r=pnkfelix

Always run rustc in a thread

cc @ishitatsuyuki @eddyb

r? @pnkfelix

[Previously](https://github.com/rust-lang/rust/pull/48575) we moved to only producing threads when absolutely necessary. Even before we opted to only create threads in some cases, which [is unsound](https://github.com/rust-lang/rust/pull/48575#issuecomment-380635967) due to the way we use thread local storage.

1 files changed, 0 insertions, 15 deletions

diff --git a/src/libstd/rt.rs b/src/libstd/rt.rs
index 9e957bd87d7..fdaf2a821fa 100644
--- a/src/libstd/rt.rs
+++ b/src/libstd/rt.rs
@@ -73,18 +73,3 @@ fn lang_start<T: ::process::Termination + 'static>
 {
     lang_start_internal(&move || main().report(), argc, argv)
 }
-
-/// Function used for reverting changes to the main stack before setrlimit().
-/// This is POSIX (non-Linux) specific and unlikely to be directly stabilized.
-#[unstable(feature = "rustc_stack_internals", issue = "0")]
-pub unsafe fn deinit_stack_guard() {
-    ::sys::thread::guard::deinit();
-}
-
-/// Function used for resetting the main stack guard address after setrlimit().
-/// This is POSIX specific and unlikely to be directly stabilized.
-#[unstable(feature = "rustc_stack_internals", issue = "0")]
-pub unsafe fn update_stack_guard() {
-    let main_guard = ::sys::thread::guard::init();
-    ::sys_common::thread_info::reset_guard(main_guard);
-}