Update library/std/src/sys/pal/common/exit_guard.rs · model-checking/verify-rust-std@cf300a7 (original) (raw)
`@@ -2,12 +2,14 @@ cfg_if::cfg_if! {
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`if #[cfg(target_os = "linux")] {
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`/// Mitigation for https://github.com/rust-lang/rust/issues/126600
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`///
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``
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/// On UNIX-like platforms (where libc::exit may not be thread-safe), ensure that only one
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/// On glibc, libc::exit has been observed to not always be thread-safe.
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/// It is currently unclear whether that is a glibc bug or allowed by the standard.
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/// To mitigate this problem, we ensure that only one
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`` /// Rust thread calls libc::exit (or returns from main) by calling this function before
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`` /// calling libc::exit (or returning from main).
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`///
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/// Technically not enough to ensure soundness, since other code directly calling
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/// libc::exit will still race with this.
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/// Technically, this is not enough to ensure soundness, since other code directly calling
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/// libc::exit will still race with this.
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`///
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`` /// This function does not itself call libc::exit. This is so it can also be used
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`` /// to guard returning from main.
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