Auto merge of #63015 - Centril:rollup-ydhpcas, r=Centril

Rollup of 22 pull requests

Successful merges:

 - #62084 (allow clippy::unreadable_literal in unicode tables)
 - #62120 (Add missing type links in documentation)
 - #62310 (Add missing doc links in boxed module)
 - #62421 (Introduce `as_deref` to Option)
 - #62583 (Implement Unpin for all raw pointers)
 - #62692 (rustc: precompute the largest Niche and store it in LayoutDetails.)
 - #62801 (Remove support for -Zlower-128bit-ops)
 - #62828 (Remove vector fadd/fmul reduction workarounds)
 - #62862 (code cleanup)
 - #62904 (Disable d32 on armv6 hf targets)
 - #62907 (Initialize the MSP430 AsmParser)
 - #62956 (Implement slow-path for FirstSets::first)
 - #62963 (Allow lexer to recover from some homoglyphs)
 - #62964 (clarify and unify some type test names)
 - #62970 (ci: gate toolstate repo pushes on the TOOLSTATE_PUBLISH envvar)
 - #62980 (std: Add more accessors for `Metadata` on Windows)
 - #62983 (Remove needless indirection through Rc)
 - #62985 (librustc_errors: Support ui-testing flag in annotate-snippet emitter)
 - #63002 (error_index_generator should output stdout/stderr when it panics.)
 - #63004 (Add test for issue-54062)
 - #63007 (ci: debug network failures while downloading awscli from PyPI)
 - #63009 (Remove redundant `mut` from variable declaration.)

Failed merges:

r? @ghost

1 files changed, 0 insertions, 168 deletions

diff --git a/src/libstd/sys/vxworks/stack_overflow.rs b/src/libstd/sys/vxworks/stack_overflow.rs
index 561279e8278..08e7b310ca1 100644
--- a/src/libstd/sys/vxworks/stack_overflow.rs
+++ b/src/libstd/sys/vxworks/stack_overflow.rs
@@ -23,174 +23,6 @@ impl Drop for Handler {
     }
 }
 
-#[cfg(any(target_os = "linux",
-          target_os = "macos",
-          target_os = "bitrig",
-          target_os = "dragonfly",
-          target_os = "freebsd",
-          target_os = "solaris",
-          all(target_os = "netbsd", not(target_vendor = "rumprun")),
-          target_os = "openbsd"))]
-mod imp {
-    use super::Handler;
-    use crate::mem;
-    use crate::ptr;
-
-    use libc::{sigaltstack, SIGSTKSZ, SS_DISABLE};
-    use libc::{sigaction, SIGBUS, SIG_DFL,
-               SA_SIGINFO, SA_ONSTACK, sighandler_t};
-    use libc::{mmap, munmap};
-    use libc::{SIGSEGV, PROT_READ, PROT_WRITE, MAP_PRIVATE, MAP_ANON};
-    use libc::MAP_FAILED;
-
-    use crate::sys_common::thread_info;
-
-
-    #[cfg(any(target_os = "linux", target_os = "android"))]
-    unsafe fn siginfo_si_addr(info: *mut libc::siginfo_t) -> usize {
-        #[repr(C)]
-        struct siginfo_t {
-            a: [libc::c_int; 3], // si_signo, si_errno, si_code
-            si_addr: *mut libc::c_void,
-        }
-
-        (*(info as *const siginfo_t)).si_addr as usize
-    }
-
-    #[cfg(not(any(target_os = "linux", target_os = "android")))]
-    unsafe fn siginfo_si_addr(info: *mut libc::siginfo_t) -> usize {
-        (*info).si_addr as usize
-    }
-
-    // Signal handler for the SIGSEGV and SIGBUS handlers. We've got guard pages
-    // (unmapped pages) at the end of every thread's stack, so if a thread ends
-    // up running into the guard page it'll trigger this handler. We want to
-    // detect these cases and print out a helpful error saying that the stack
-    // has overflowed. All other signals, however, should go back to what they
-    // were originally supposed to do.
-    //
-    // This handler currently exists purely to print an informative message
-    // whenever a thread overflows its stack. We then abort to exit and
-    // indicate a crash, but to avoid a misleading SIGSEGV that might lead
-    // users to believe that unsafe code has accessed an invalid pointer; the
-    // SIGSEGV encountered when overflowing the stack is expected and
-    // well-defined.
-    //
-    // If this is not a stack overflow, the handler un-registers itself and
-    // then returns (to allow the original signal to be delivered again).
-    // Returning from this kind of signal handler is technically not defined
-    // to work when reading the POSIX spec strictly, but in practice it turns
-    // out many large systems and all implementations allow returning from a
-    // signal handler to work. For a more detailed explanation see the
-    // comments on #26458.
-    unsafe extern fn signal_handler(signum: libc::c_int,
-                                    info: *mut libc::siginfo_t,
-                                    _data: *mut libc::c_void) {
-        use crate::sys_common::util::report_overflow;
-
-        let guard = thread_info::stack_guard().unwrap_or(0..0);
-        let addr = siginfo_si_addr(info);
-
-        // If the faulting address is within the guard page, then we print a
-        // message saying so and abort.
-        if guard.start <= addr && addr < guard.end {
-            report_overflow();
-            rtabort!("stack overflow");
-        } else {
-            // Unregister ourselves by reverting back to the default behavior.
-            let mut action: sigaction = mem::zeroed();
-            action.sa_sigaction = SIG_DFL;
-            sigaction(signum, &action, ptr::null_mut());
-
-            // See comment above for why this function returns.
-        }
-    }
-
-    static mut MAIN_ALTSTACK: *mut libc::c_void = ptr::null_mut();
-
-    pub unsafe fn init() {
-        let mut action: sigaction = mem::zeroed();
-        action.sa_flags = SA_SIGINFO | SA_ONSTACK;
-        action.sa_sigaction = signal_handler as sighandler_t;
-        sigaction(SIGSEGV, &action, ptr::null_mut());
-        sigaction(SIGBUS, &action, ptr::null_mut());
-
-        let handler = make_handler();
-        MAIN_ALTSTACK = handler._data;
-        mem::forget(handler);
-    }
-
-    pub unsafe fn cleanup() {
-        Handler { _data: MAIN_ALTSTACK };
-    }
-
-    unsafe fn get_stackp() -> *mut libc::c_void {
-        let stackp = mmap(ptr::null_mut(),
-                          SIGSTKSZ,
-                          PROT_READ | PROT_WRITE,
-                          MAP_PRIVATE | MAP_ANON,
-                          -1,
-                          0);
-        if stackp == MAP_FAILED {
-            panic!("failed to allocate an alternative stack");
-        }
-        stackp
-    }
-
-    #[cfg(any(target_os = "linux",
-              target_os = "macos",
-              target_os = "bitrig",
-              target_os = "freebsd",
-              target_os = "netbsd",
-              target_os = "openbsd",
-              target_os = "solaris"))]
-    unsafe fn get_stack() -> libc::stack_t {
-        libc::stack_t { ss_sp: get_stackp(), ss_flags: 0, ss_size: SIGSTKSZ }
-    }
-
-    #[cfg(target_os = "dragonfly")]
-    unsafe fn get_stack() -> libc::stack_t {
-        libc::stack_t { ss_sp: get_stackp() as *mut i8, ss_flags: 0, ss_size: SIGSTKSZ }
-    }
-
-    pub unsafe fn make_handler() -> Handler {
-        let mut stack = mem::zeroed();
-        sigaltstack(ptr::null(), &mut stack);
-        // Configure alternate signal stack, if one is not already set.
-        if stack.ss_flags & SS_DISABLE != 0 {
-            stack = get_stack();
-            sigaltstack(&stack, ptr::null_mut());
-            Handler { _data: stack.ss_sp as *mut libc::c_void }
-        } else {
-            Handler { _data: ptr::null_mut() }
-        }
-    }
-
-    pub unsafe fn drop_handler(handler: &mut Handler) {
-        if !handler._data.is_null() {
-            let stack =  libc::stack_t {
-                ss_sp: ptr::null_mut(),
-                ss_flags: SS_DISABLE,
-                // Workaround for bug in macOS implementation of sigaltstack
-                // UNIX2003 which returns ENOMEM when disabling a stack while
-                // passing ss_size smaller than MINSIGSTKSZ. According to POSIX
-                // both ss_sp and ss_size should be ignored in this case.
-                ss_size: SIGSTKSZ,
-            };
-            sigaltstack(&stack, ptr::null_mut());
-            munmap(handler._data, SIGSTKSZ);
-        }
-    }
-}
-
-#[cfg(not(any(target_os = "linux",
-              target_os = "macos",
-              target_os = "bitrig",
-              target_os = "dragonfly",
-              target_os = "freebsd",
-              target_os = "solaris",
-              all(target_os = "netbsd", not(target_vendor = "rumprun")),
-              target_os = "openbsd")))]
 mod imp {
     use crate::ptr;