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Trevor Gross
150905c3de
Add a regression test for RUST-150898 to make users aware that if this test fails, they may encounter unusual behavior elsewhere. Original repro authored by dianqk.
60 lines
1.7 KiB
Rust
60 lines
1.7 KiB
Rust
// Regression test for https://github.com/rust-lang/rust/issues/150898
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//
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// This test fails on Apple platforms with versions containing an allocator
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// bug. If this fails with SIGABRT, you may need to upgrade your system to
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// avoid other unexpected behavior.
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//
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// Note that the failure is non-deterministic so this test may pass even in
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// conditions where the bug is present. That being said, on the author's
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// machine this has a 100% rate of hitting the crash on at least a couple
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// threads.
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//
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// The bug was resolved by macOS 26.4.
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//@ run-pass
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//@ only-aarch64-apple-darwin
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//@ compile-flags: -C opt-level=1 -C codegen-units=1
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use std::thread;
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fn main() {
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// Running with multiple threads substantially increases the change of
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// hitting the bug.
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thread::scope(|s| {
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for _ in 0..10 {
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s.spawn(run);
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}
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});
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}
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fn run() {
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// This doesn't always fail, so rerun a few times
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for _ in 0..100 {
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unsafe {
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core::arch::asm!(
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"
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// Alloc 18 bytes
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mov x0, #18
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bl _malloc
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// Save the pointer to x21
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mov x21, x0
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// Alloc 18 bytes again
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mov x0, #18
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bl _malloc
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// Store the contents of `x13` to the second allocation. `x13` is the
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// magic register to cause the crash, other registers work well.
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str x13, [x0]
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// Free the pointers
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bl _free
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mov x0, x21
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bl _free
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",
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out("x0") _,
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out("x13") _,
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out("x21") _,
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clobber_abi("C"),
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)
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}
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}
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}
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