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Auto merge of #30678 - Amanieu:no_elf_tls, r=alexcrichton

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I also re-enabled the use of `#[thread_local]` on AArch64. It was originally disabled in the PR that introduced AArch64 (#19790), but the reasons for this were not explained. `#[thread_local]` seems to work fine in my tests on AArch64, so I don't think this should be an issue.

cc @alexcrichton @akiss77
This commit is contained in:
bors 2016-01-12 08:30:56 +00:00
parent d6cb2791ce e304fb43a3
commit 3246eaec90
5 changed files with 5 additions and 45 deletions
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4
mk/crates.mk
View file

@ -175,9 +175,5 @@ endef
$(foreach crate,$(TOOLS),$(eval $(call RUST_TOOL,$(crate))))
ifdef CFG_DISABLE_ELF_TLS
RUSTFLAGS_std := --cfg no_elf_tls
endif
CRATEFILE_libc := $(SREL)src/liblibc/src/lib.rs
RUSTFLAGS_libc := --cfg stdbuild

3
src/librustc_back/target/aarch64_unknown_linux_gnu.rs
View file

@ -11,8 +11,7 @@
use target::Target;
pub fn target() -> Target {
let mut base = super::linux_base::opts();
base.has_elf_tls = false;
let base = super::linux_base::opts();
Target {
llvm_target: "aarch64-unknown-linux-gnu".to_string(),
target_endian: "little".to_string(),

1
src/librustc_back/target/android_base.rs
View file

@ -17,5 +17,6 @@ pub fn opts() -> TargetOptions {
base.pre_link_args.push("-Wl,--allow-multiple-definition".to_string());
base.is_like_android = true;
base.position_independent_executables = true;
base.has_elf_tls = false;
base
}

1
src/librustc_back/target/arm_linux_androideabi.rs
View file

@ -13,7 +13,6 @@
pub fn target() -> Target {
let mut base = super::android_base::opts();
base.features = "+v7".to_string();
base.has_elf_tls = false;
Target {
llvm_target: "arm-linux-androideabi".to_string(),

41
src/libstd/thread/scoped_tls.rs
View file

@ -87,32 +87,9 @@ macro_rules! scoped_thread_local {
issue = "0")]
#[macro_export]
#[allow_internal_unstable]
#[cfg(no_elf_tls)]
macro_rules! __scoped_thread_local_inner {
($t:ty) => {{
static _KEY: $crate::thread::__ScopedKeyInner<$t> =
$crate::thread::__ScopedKeyInner::new();
fn _getit() -> &'static $crate::thread::__ScopedKeyInner<$t> { &_KEY }
$crate::thread::ScopedKey::new(_getit)
}}
}
#[doc(hidden)]
#[unstable(feature = "thread_local_internals",
reason = "should not be necessary",
issue = "0")]
#[macro_export]
#[allow_internal_unstable]
#[cfg(not(no_elf_tls))]
macro_rules! __scoped_thread_local_inner {
($t:ty) => {{
#[cfg_attr(not(any(windows,
target_os = "android",
target_os = "ios",
target_os = "netbsd",
target_os = "openbsd",
target_arch = "aarch64")),
thread_local)]
#[cfg_attr(target_thread_local, thread_local)]
static _KEY: $crate::thread::__ScopedKeyInner<$t> =
$crate::thread::__ScopedKeyInner::new();
fn _getit() -> &'static $crate::thread::__ScopedKeyInner<$t> { &_KEY }
@ -221,13 +198,7 @@ pub fn is_set(&'static self) -> bool {
}
}
#[cfg(not(any(windows,
target_os = "android",
target_os = "ios",
target_os = "netbsd",
target_os = "openbsd",
target_arch = "aarch64",
no_elf_tls)))]
#[cfg(target_thread_local)]
#[doc(hidden)]
mod imp {
use cell::Cell;
@ -246,13 +217,7 @@ pub unsafe fn get(&self) -> *mut T { self.inner.get() }
}
}
#[cfg(any(windows,
target_os = "android",
target_os = "ios",
target_os = "netbsd",
target_os = "openbsd",
target_arch = "aarch64",
no_elf_tls))]
#[cfg(not(target_thread_local))]
#[doc(hidden)]
mod imp {
use cell::Cell;