75fa9f6dec
This commit is extracted from #122036 and adds a new directive to the `compiletest` test runner, `//@ needs-threads`. This is intended to capture the need that a target must implement threading to execute a specific test, typically one that uses `std::thread`. This is primarily done for WebAssembly targets which currently do not have threads by default. This enables transitioning a lot of `//@ ignore-wasm*`-style ignores into a more self-documenting `//@ needs-threads` directive. Additionally the `wasm32-wasi-preview1-threads` target, for example, does actually have threads, but isn't tested in CI at this time. This change enables running these tests for that target, but not other wasm targets.
23 lines
675 B
Rust
23 lines
675 B
Rust
//@ run-pass
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//@ needs-threads
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//@ compile-flags: -O
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// Tests that the `vec!` macro does not overflow the stack when it is
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// given data larger than the stack.
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// FIXME(eddyb) Improve unoptimized codegen to avoid the temporary,
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// and thus run successfully even when compiled at -C opt-level=0.
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const LEN: usize = 1 << 15;
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use std::thread::Builder;
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fn main() {
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assert!(Builder::new().stack_size(LEN / 2).spawn(|| {
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// FIXME(eddyb) this can be vec![[0: LEN]] pending
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// https://llvm.org/bugs/show_bug.cgi?id=28987
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let vec = vec![unsafe { std::mem::zeroed::<[u8; LEN]>() }];
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assert_eq!(vec.len(), 1);
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}).unwrap().join().is_ok());
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}
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