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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/abi/extern/extern-call-deep2.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/abi/extern/extern-call-deep2.rs b/src/test/ui/abi/extern/extern-call-deep2.rs new file mode 100644 index 000000000..60e8db159 --- /dev/null +++ b/src/test/ui/abi/extern/extern-call-deep2.rs @@ -0,0 +1,41 @@ +// run-pass +#![allow(unused_must_use)] +// ignore-emscripten no threads support +#![feature(rustc_private)] + +extern crate libc; +use std::thread; + +mod rustrt { + extern crate libc; + + #[link(name = "rust_test_helpers", kind = "static")] + extern "C" { + pub fn rust_dbg_call( + cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t, + data: libc::uintptr_t, + ) -> libc::uintptr_t; + } +} + +extern "C" fn cb(data: libc::uintptr_t) -> libc::uintptr_t { + if data == 1 { data } else { count(data - 1) + 1 } +} + +fn count(n: libc::uintptr_t) -> libc::uintptr_t { + unsafe { + println!("n = {}", n); + rustrt::rust_dbg_call(cb, n) + } +} + +pub fn main() { + // Make sure we're on a thread with small Rust stacks (main currently + // has a large stack) + thread::spawn(move || { + let result = count(1000); + println!("result = {}", result); + assert_eq!(result, 1000); + }) + .join(); +} |