我正在阅读second edition of Writing an OS in Rust。在第三章我遇到了一个问题 - 定义静态spin::Mutex会挂起编译器。我设法将代码缩减为：
的src / main.rs
#![feature(lang_items, start)]
#![no_std]
#![no_main]
use core::sync::atomic::{Ordering, ATOMIC_BOOL_INIT};
#[no_mangle]
pub extern "C" fn _start() -> ! {
let b = ATOMIC_BOOL_INIT;
b.store(true, Ordering::SeqCst);
loop {}
}
#[lang = "eh_personality"] pub extern fn eh_personality() {}
#[lang = "panic_fmt"] pub extern fn panic_fmt() -> ! { loop {} }
Cargo.toml
[package]
name = "repro"
version = "0.1.0"
[profile.dev]
panic = "abort"
[profile.release]
panic = "abort"
x86_64的-repro.json
{
"llvm-target": "x86_64-unknown-none",
"data-layout": "e-m:e-i64:64-f80:128-n8:16:32:64-S128",
"linker-flavor": "ld.lld",
"target-endian": "little",
"target-pointer-width": "64",
"target-c-int-width": "32",
"arch": "x86_64",
"os": "none",
"executables": true,
"disable-redzone": true,
"features": "-mmx,-sse,+soft-float",
"panic-strategy": "abort"
}
有了这个，当我运行xargo build --target=x86_64-repro时，它似乎永远挂在Compiling repro v0.1.0 (file:...)上。我离开它10分钟，它似乎没有取得任何进展（没有处理器使用，使用的内存量不会改变）。
nightly-x86_64-pc-windows-gnu rustc 1.27.0-nightly (056f589fb 2018-04-07) cargo 1.26.0-nightly (b70ab13b3 2018-04-04) xargo 0.3.12 使用$env:RUST_LOG=debug启用rustc日志记录表明编译似乎停留在链接上：
DEBUG 2018-04-09T11:38:55Z: cargo::core::workspace: find_root - trying C:\Users\djade\Desktop\osprojrep\Cargo.toml
DEBUG 2018-04-09T11:38:55Z: cargo::core::workspace: find_root - trying C:\Users\djade\Desktop\Cargo.toml
DEBUG 2018-04-09T11:38:55Z: cargo::core::workspace: find_root - trying C:\Users\djade\Cargo.toml
DEBUG 2018-04-09T11:38:55Z: cargo::core::workspace: find_root - trying C:\Users\Cargo.toml
DEBUG 2018-04-09T11:38:55Z: cargo::core::workspace: find_root - trying C:\Cargo.toml
DEBUG 2018-04-09T11:38:55Z: cargo::core::workspace: find_members - only me as a member
DEBUG 2018-04-09T11:38:55Z: cargo::ops::resolve: attempting to prefer repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro)
DEBUG 2018-04-09T11:38:55Z: cargo::core::registry: load/missing file:///C:/Users/djade/Desktop/osprojrep/repro
DEBUG 2018-04-09T11:38:55Z: cargo::sources::config: loading: file:///C:/Users/djade/Desktop/osprojrep/repro
DEBUG 2018-04-09T11:38:55Z: cargo::core::resolver: initial activation: repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro)
DEBUG 2018-04-09T11:38:55Z: cargo::ops::resolve: attempting to prefer repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro)
DEBUG 2018-04-09T11:38:55Z: cargo::core::registry: load/locked file:///C:/Users/djade/Desktop/osprojrep/repro
DEBUG 2018-04-09T11:38:55Z: cargo::core::resolver: initial activation: repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro)
INFO 2018-04-09T11:38:55Z: jobserver::imp: created jobserver Client { sem: Handle(0x230), name: "__rust_jobserver_semaphore_3539026941" }
DEBUG 2018-04-09T11:38:55Z: cargo::ops::cargo_rustc::context: probe_target_info
DEBUG 2018-04-09T11:38:56Z: cargo::ops::cargo_rustc::fingerprint: fingerprint at: C:\Users\djade\Desktop\osprojrep\repro\target\x86_64-repro\debug\.fingerprint\repro-1e7ce729192ba73b\bin-repro-1e7ce729192ba73b
INFO 2018-04-09T11:38:56Z: cargo::ops::cargo_rustc::fingerprint: fingerprint error for repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro): failed to read `C:\Users\djade\Desktop\osprojrep\repro\target\x86_64-repro\debug\.fingerprint\repro-1e7ce729192ba73b\bin-repro-1e7ce729192ba73b`
INFO 2018-04-09T11:38:56Z: cargo::ops::cargo_rustc::fingerprint: cause: The system cannot find the file specified. (os error 2)
INFO 2018-04-09T11:38:56Z: cargo::ops::cargo_rustc::context::compilation_files: Target filenames: [OutputFile { path: "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b", hardlink: Some("C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\repro"), flavor: Normal }]
INFO 2018-04-09T11:38:56Z: cargo::ops::cargo_rustc::job_queue: start: repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro) => Target(bin: repro)/Profile(build) => Target
Compiling repro v0.1.0 (file:///C:/Users/djade/Desktop/osprojrep/repro)
INFO 2018-04-09T11:38:56Z: jobserver::imp: opened environment semaphore __rust_jobserver_semaphore_3539026941
INFO 2018-04-09T11:38:56Z: rustc_driver: codegen backend candidate: C:\Users\djade\.rustup\toolchains\nightly-x86_64-pc-windows-gnu\lib\rustlib\x86_64-pc-windows-gnu\codegen-backends
INFO 2018-04-09T11:38:56Z: rustc_driver: probing C:\Users\djade\.rustup\toolchains\nightly-x86_64-pc-windows-gnu\lib\rustlib\x86_64-pc-windows-gnu\codegen-backends for a codegen backend
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: resolving crate `extern crate compiler_builtins as compiler_builtins`
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: falling back to a load
INFO 2018-04-09T11:38:56Z: rustc_metadata::locator: lib candidate: C:\Users\djade\.xargo\lib\rustlib\x86_64-repro\lib\libcompiler_builtins-95e63877493349a0.rlib
INFO 2018-04-09T11:38:56Z: rustc_metadata::locator: rlib reading metadata from: \\?\C:\Users\djade\.xargo\lib\rustlib\x86_64-repro\lib\libcompiler_builtins-95e63877493349a0.rlib
INFO 2018-04-09T11:38:56Z: rustc_metadata::locator: reading "libcompiler_builtins-95e63877493349a0.rlib" => Duration { secs: 0, nanos: 223543 }
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: register crate `extern crate compiler_builtins as compiler_builtins`
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: resolving dep crate core hash: `59386c7ce0d7be7a` extra filename: `-fd00811e13d47697`
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: resolving crate `extern crate core as core`
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: falling back to a load
INFO 2018-04-09T11:38:56Z: rustc_metadata::locator: lib candidate: C:\Users\djade\.xargo\lib\rustlib\x86_64-repro\lib\libcore-fd00811e13d47697.rlib
INFO 2018-04-09T11:38:56Z: rustc_metadata::locator: rlib reading metadata from: \\?\C:\Users\djade\.xargo\lib\rustlib\x86_64-repro\lib\libcore-fd00811e13d47697.rlib
INFO 2018-04-09T11:38:56Z: rustc_metadata::locator: reading "libcore-fd00811e13d47697.rlib" => Duration { secs: 0, nanos: 219532 }
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: register crate `extern crate core as core`
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: resolving crate `extern crate core as core`
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: resolved crates:
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: name: compiler_builtins
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: cnum: 1
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: hash: 5fe7de92c54e02b5
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: reqd: Explicit
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: rlib: \\?\C:\Users\djade\.xargo\lib\rustlib\x86_64-repro\lib\libcompiler_builtins-95e63877493349a0.rlib
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: name: core
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: cnum: 2
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: hash: 59386c7ce0d7be7a
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: reqd: Explicit
INFO 2018-04-09T11:38:56Z: rustc_metadata::creader: rlib: \\?\C:\Users\djade\.xargo\lib\rustlib\x86_64-repro\lib\libcore-fd00811e13d47697.rlib
INFO 2018-04-09T11:38:56Z: rustc_mir::build: fn_id DefId(0/0:7 ~ repro[4180]::_start[0]) has attrs Borrowed([Attribute { id: AttrId(3), style: Outer, path: path(no_mangle), tokens: TokenStream { kind: Empty }, is_sugared_doc: false, span: src\main.rs:7:1: 7:13 }])
INFO 2018-04-09T11:38:56Z: rustc_mir::build: fn_id DefId(0/0:8 ~ repro[4180]::eh_personality[0]) has attrs Borrowed([Attribute { id: AttrId(4), style: Outer, path: path(lang), tokens: TokenStream { kind: Stream([TokenStream { kind: Tree(Token(src\main.rs:14:8: 14:9, Eq)) }, TokenStream { kind: Tree(Token(src\main.rs:14:10: 14:26, Literal(Str_(eh_personality), None))) }]) }, is_sugared_doc: false, span: src\main.rs:14:1: 14:27 }])
INFO 2018-04-09T11:38:56Z: rustc_mir::build: fn_id DefId(0/0:9 ~ repro[4180]::panic_fmt[0]) has attrs Borrowed([Attribute { id: AttrId(5), style: Outer, path: path(lang), tokens: TokenStream { kind: Stream([TokenStream { kind: Tree(Token(src\main.rs:15:8: 15:9, Eq)) }, TokenStream { kind: Tree(Token(src\main.rs:15:10: 15:21, Literal(Str_(panic_fmt), None))) }]) }, is_sugared_doc: false, span: src\main.rs:15:1: 15:22 }])
Pre-trans
Ty interner total ty region both
TyAdt : 129 75.9%, 0.0% 0.0% 0.0%
TyArray : 0 0.0%, 0.0% 0.0% 0.0%
TySlice : 0 0.0%, 0.0% 0.0% 0.0%
TyRawPtr : 4 2.4%, 0.0% 0.0% 0.0%
TyRef : 19 11.2%, 0.0% 0.0% 0.0%
TyFnDef : 4 2.4%, 0.0% 0.0% 0.0%
TyFnPtr : 0 0.0%, 0.0% 0.0% 0.0%
TyGenerator : 0 0.0%, 0.0% 0.0% 0.0%
TyGeneratorWitness: 0 0.0%, 0.0% 0.0% 0.0%
TyDynamic : 0 0.0%, 0.0% 0.0% 0.0%
TyClosure : 0 0.0%, 0.0% 0.0% 0.0%
TyTuple : 1 0.6%, 0.0% 0.0% 0.0%
TyParam : 11 6.5%, 0.0% 0.0% 0.0%
TyInfer : 1 0.6%, 0.6% 0.0% 0.0%
TyProjection : 1 0.6%, 0.0% 0.0% 0.0%
TyAnon : 0 0.0%, 0.0% 0.0% 0.0%
TyForeign : 0 0.0%, 0.0% 0.0% 0.0%
total 170 0.6% 0.0% 0.0%
Substs interner: #45
Region interner: #47
Stability interner: #2
Interpret interner: #0
Layout interner: #0
INFO 2018-04-09T11:38:56Z: rustc_trans_utils::link: LinkMeta { crate_hash: Svh { hash: 14623612180396971999 } }
INFO 2018-04-09T11:38:56Z: rustc_trans::base: trans_instance(core::sync::atomic::atomic_store::<u8>)
INFO 2018-04-09T11:38:56Z: rustc_trans::base: trans_instance(<core::cell::UnsafeCell<T>><u8>::get)
INFO 2018-04-09T11:38:56Z: rustc_trans::base: trans_instance(core::sync::atomic::AtomicBool::store)
INFO 2018-04-09T11:38:56Z: rustc_trans::base: trans_instance(_start)
Post-trans
Ty interner total ty region both
TyAdt : 129 60.6%, 0.0% 0.0% 0.0%
TyArray : 0 0.0%, 0.0% 0.0% 0.0%
TySlice : 0 0.0%, 0.0% 0.0% 0.0%
TyRawPtr : 6 2.8%, 0.0% 0.0% 0.0%
TyRef : 37 17.4%, 0.0% 0.0% 0.0%
TyFnDef : 18 8.5%, 0.0% 0.0% 0.0%
TyFnPtr : 7 3.3%, 0.0% 0.0% 0.0%
TyGenerator : 0 0.0%, 0.0% 0.0% 0.0%
TyGeneratorWitness: 0 0.0%, 0.0% 0.0% 0.0%
TyDynamic : 0 0.0%, 0.0% 0.0% 0.0%
TyClosure : 0 0.0%, 0.0% 0.0% 0.0%
TyTuple : 3 1.4%, 0.0% 0.0% 0.0%
TyParam : 11 5.2%, 0.0% 0.0% 0.0%
TyInfer : 1 0.5%, 0.5% 0.0% 0.0%
TyProjection : 1 0.5%, 0.0% 0.0% 0.0%
TyAnon : 0 0.0%, 0.0% 0.0% 0.0%
TyForeign : 0 0.0%, 0.0% 0.0% 0.0%
total 213 0.5% 0.0% 0.0%
Substs interner: #50
Region interner: #48
Stability interner: #2
Interpret interner: #11
Layout interner: #15
INFO 2018-04-09T11:38:56Z: rustc_trans::back::link: preparing CrateTypeExecutable to "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b"
INFO 2018-04-09T11:38:56Z: rustc_trans::back::link: "lld" "-flavor" "gnu" "-L" "C:\\Users\\djade\\.xargo\\lib\\rustlib\\x86_64-repro\\lib" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b.3ik0x0hz6l66cx38.rcgu.o" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b.45pc7c65foh9i35f.rcgu.o" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b.4hrpdi97o8cjelph.rcgu.o" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b.57k06xfugllsc526.rcgu.o" "-o" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps\\repro-1e7ce729192ba73b" "--gc-sections" "-L" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\x86_64-repro\\debug\\deps" "-L" "C:\\Users\\djade\\Desktop\\osprojrep\\repro\\target\\debug\\deps" "-L" "C:\\Users\\djade\\.xargo\\lib\\rustlib\\x86_64-repro\\lib" "-Bstatic" "C:\\Users\\djade\\.xargo\\lib\\rustlib\\x86_64-repro\\lib\\libcore-fd00811e13d47697.rlib" "C:\\Users\\djade\\.xargo\\lib\\rustlib\\x86_64-repro\\lib\\libcompiler_builtins-95e63877493349a0.rlib" "-Bdynamic"
还有一些可能感兴趣的事情：
x86_64-repro进行编译失败，并在file format not recognized内的某个对象文件中出现链接器错误.xargo。rust_eh_personality的引用的链接器消息更长。main.rs更改为lib.rs会使其成功编译。b.store(...);使其成功编译。那么，这是什么？ Xargo bug？ Rustc bug？链接器错误？我的配置在某处错了吗？