66 lines
1.9 KiB
Rust
66 lines
1.9 KiB
Rust
// run-pass
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// ignore-wasm32-bare compiled with panic=abort by default
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// ignore-emscripten no threads support
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// ignore-e2k64 asmparser
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// rust-lang/rust#64655: with panic=unwind, a panic from a subroutine
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// should still run destructors as it unwinds the stack. However,
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// bugs with how the nounwind LLVM attribute was applied led to this
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// simple case being mishandled *if* you had fat LTO turned on.
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// Unlike issue-64655-extern-rust-must-allow-unwind.rs, the issue
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// embodied in this test cropped up regardless of optimization level.
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// Therefore it seemed worthy of being enshrined as a dedicated unit
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// test.
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// LTO settings cannot be combined with -C prefer-dynamic
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// no-prefer-dynamic
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// The revisions just enumerate lto settings (the opt-level appeared irrelevant in practice)
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// revisions: no thin fat
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//[no]compile-flags: -C lto=no
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//[thin]compile-flags: -C lto=thin
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//[fat]compile-flags: -C lto=fat
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#![feature(core_panic)]
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// (For some reason, reproducing the LTO issue requires pulling in std
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// explicitly this way.)
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#![no_std]
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extern crate std;
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fn main() {
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::boxed::Box;
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static SHARED: AtomicUsize = AtomicUsize::new(0);
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assert_eq!(SHARED.fetch_add(0, Ordering::SeqCst), 0);
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let old_hook = std::panic::take_hook();
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std::panic::set_hook(Box::new(|_| { } )); // no-op on panic.
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let handle = std::thread::spawn(|| {
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struct Droppable;
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impl Drop for Droppable {
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fn drop(&mut self) {
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SHARED.fetch_add(1, Ordering::SeqCst);
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}
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}
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let _guard = Droppable;
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core::panicking::panic("???");
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});
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let wait = handle.join();
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// Reinstate handler to ease observation of assertion failures.
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std::panic::set_hook(old_hook);
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assert!(wait.is_err());
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assert_eq!(SHARED.fetch_add(0, Ordering::SeqCst), 1);
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}
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