Skip to content

Remove RUSTC_RETRY_LINKER_ON_SEGFAULT hack #141749

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
May 30, 2025
+2 −57
Merged

Remove RUSTC_RETRY_LINKER_ON_SEGFAULT hack #141749

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
54 changes: 2 additions & 52 deletions compiler/rustc_codegen_ssa/src/back/link.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@ use std::fs::{File, OpenOptions, read};
use std::io::{BufWriter, Write};
use std::ops::{ControlFlow, Deref};
use std::path::{Path, PathBuf};
use std::process::{ExitStatus, Output, Stdio};
use std::process::{Output, Stdio};
use std::{env, fmt, fs, io, mem, str};

use cc::windows_registry;
Expand Down Expand Up @@ -736,13 +736,10 @@ fn link_natively(

// Invoke the system linker
info!("{cmd:?}");
let retry_on_segfault = env::var("RUSTC_RETRY_LINKER_ON_SEGFAULT").is_ok();
let unknown_arg_regex =
Regex::new(r"(unknown|unrecognized) (command line )?(option|argument)").unwrap();
let mut prog;
let mut i = 0;
loop {
i += 1;
prog = sess.time("run_linker", || exec_linker(sess, &cmd, out_filename, flavor, tmpdir));
let Ok(ref output) = prog else {
break;
Expand Down Expand Up @@ -858,54 +855,7 @@ fn link_natively(
continue;
}

// Here's a terribly awful hack that really shouldn't be present in any
// compiler. Here an environment variable is supported to automatically
// retry the linker invocation if the linker looks like it segfaulted.
//
// Gee that seems odd, normally segfaults are things we want to know
// about! Unfortunately though in rust-lang/rust#38878 we're
// experiencing the linker segfaulting on Travis quite a bit which is
// causing quite a bit of pain to land PRs when they spuriously fail
// due to a segfault.
//
// The issue #38878 has some more debugging information on it as well,
// but this unfortunately looks like it's just a race condition in
// macOS's linker with some thread pool working in the background. It
// seems that no one currently knows a fix for this so in the meantime
// we're left with this...
if !retry_on_segfault || i > 3 {
break;
}
let msg_segv = "clang: error: unable to execute command: Segmentation fault: 11";
let msg_bus = "clang: error: unable to execute command: Bus error: 10";
if out.contains(msg_segv) || out.contains(msg_bus) {
warn!(
?cmd, %out,
"looks like the linker segfaulted when we tried to call it, \
automatically retrying again",
);
continue;
}

if is_illegal_instruction(&output.status) {
warn!(
?cmd, %out, status = %output.status,
"looks like the linker hit an illegal instruction when we \
tried to call it, automatically retrying again.",
);
continue;
}

#[cfg(unix)]
fn is_illegal_instruction(status: &ExitStatus) -> bool {
use std::os::unix::prelude::*;
status.signal() == Some(libc::SIGILL)
}

#[cfg(not(unix))]
fn is_illegal_instruction(_status: &ExitStatus) -> bool {
false
}
break;
}

match prog {
Expand Down
5 changes: 0 additions & 5 deletions src/ci/github-actions/jobs.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,6 @@ envs:
env-x86_64-apple-tests: &env-x86_64-apple-tests
SCRIPT: ./x.py check compiletest --set build.compiletest-use-stage0-libtest=true && ./x.py --stage 2 test --skip tests/ui --skip tests/rustdoc -- --exact
RUST_CONFIGURE_ARGS: --build=x86_64-apple-darwin --enable-sanitizers --enable-profiler --set rust.jemalloc
RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
# Ensure that host tooling is tested on our minimum supported macOS version.
MACOSX_DEPLOYMENT_TARGET: 10.12
MACOSX_STD_DEPLOYMENT_TARGET: 10.12
Expand Down Expand Up @@ -402,7 +401,6 @@ auto:
env:
SCRIPT: ./x.py dist bootstrap --include-default-paths --host=x86_64-apple-darwin --target=x86_64-apple-darwin
RUST_CONFIGURE_ARGS: --enable-full-tools --enable-sanitizers --enable-profiler --set rust.jemalloc --set rust.lto=thin --set rust.codegen-units=1
RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
# Ensure that host tooling is built to support our minimum support macOS version.
MACOSX_DEPLOYMENT_TARGET: 10.12
MACOSX_STD_DEPLOYMENT_TARGET: 10.12
Expand All @@ -420,7 +418,6 @@ auto:
# Mac Catalyst cannot currently compile the sanitizer:
# https://github.com/rust-lang/rust/issues/129069
RUST_CONFIGURE_ARGS: --enable-sanitizers --enable-profiler --set rust.jemalloc --set target.aarch64-apple-ios-macabi.sanitizers=false --set target.x86_64-apple-ios-macabi.sanitizers=false
RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
# Ensure that host tooling is built to support our minimum support macOS version.
# FIXME(madsmtm): This might be redundant, as we're not building host tooling here (?)
MACOSX_DEPLOYMENT_TARGET: 10.12
Expand Down Expand Up @@ -453,7 +450,6 @@ auto:
--set llvm.ninja=false
--set rust.lto=thin
--set rust.codegen-units=1
RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
SELECT_XCODE: /Applications/Xcode_15.4.app
USE_XCODE_CLANG: 1
# Aarch64 tooling only needs to support macOS 11.0 and up as nothing else
Expand All @@ -474,7 +470,6 @@ auto:
--enable-sanitizers
--enable-profiler
--set rust.jemalloc
RUSTC_RETRY_LINKER_ON_SEGFAULT: 1
SELECT_XCODE: /Applications/Xcode_15.4.app
USE_XCODE_CLANG: 1
# Aarch64 tooling only needs to support macOS 11.0 and up as nothing else
Expand Down
Loading