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.
46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
//@ run-pass
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#![allow(unused_must_use)]
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// This time we're testing repeatedly going up and down both stacks to
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// make sure the stack pointers are maintained properly in both
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// directions
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//@ needs-threads
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#![feature(rustc_private)]
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extern crate libc;
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use std::thread;
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mod rustrt {
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extern crate libc;
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#[link(name = "rust_test_helpers", kind = "static")]
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extern "C" {
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pub fn rust_dbg_call(
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cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t,
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data: libc::uintptr_t,
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) -> libc::uintptr_t;
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}
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}
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extern "C" fn cb(data: libc::uintptr_t) -> libc::uintptr_t {
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if data == 1 { data } else { count(data - 1) + count(data - 1) }
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}
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fn count(n: libc::uintptr_t) -> libc::uintptr_t {
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unsafe {
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println!("n = {}", n);
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rustrt::rust_dbg_call(cb, n)
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}
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}
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pub fn main() {
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// Make sure we're on a thread with small Rust stacks (main currently
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// has a large stack)
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thread::spawn(move || {
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let result = count(12);
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println!("result = {}", result);
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assert_eq!(result, 2048);
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})
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.join();
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}
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