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Merge pull request #9 from Wind-River/V7LIBC-948

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remove the reference to __cxa_thread_atexit_impl
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Baoshan 2019-08-27 15:06:16 -07:00 committed by GitHub
commit cce631a5a4
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1 changed files with 2 additions and 25 deletions
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27
src/libstd/sys/vxworks/fast_thread_local.rs
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@ -1,33 +1,10 @@
// Copyright (c) 2019 Wind River Systems, Inc.
#![cfg(target_thread_local)]
#![unstable(feature = "thread_local_internals", issue = "0")]
// Since what appears to be glibc 2.18 this symbol has been shipped which
// GCC and clang both use to invoke destructors in thread_local globals, so
// let's do the same!
//
// Note, however, that we run on lots older linuxes, as well as cross
// compiling from a newer linux to an older linux, so we also have a
// fallback implementation to use as well.
//
// Due to rust-lang/rust#18804, make sure this is not generic!
pub unsafe fn register_dtor(t: *mut u8, dtor: unsafe extern fn(*mut u8)) {
use crate::mem;
use crate::sys_common::thread_local::register_dtor_fallback;
extern {
#[linkage = "extern_weak"]
static __dso_handle: *mut u8;
#[linkage = "extern_weak"]
static __cxa_thread_atexit_impl: *const libc::c_void;
}
if !__cxa_thread_atexit_impl.is_null() {
type F = unsafe extern fn(dtor: unsafe extern fn(*mut u8),
arg: *mut u8,
dso_handle: *mut u8) -> libc::c_int;
mem::transmute::<*const libc::c_void, F>(__cxa_thread_atexit_impl)
(dtor, t, &__dso_handle as *const _ as *mut _);
return
}
register_dtor_fallback(t, dtor);
}