From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/test/ui/abi/extern/extern-call-scrub.rs | 45 +++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/test/ui/abi/extern/extern-call-scrub.rs (limited to 'src/test/ui/abi/extern/extern-call-scrub.rs') diff --git a/src/test/ui/abi/extern/extern-call-scrub.rs b/src/test/ui/abi/extern/extern-call-scrub.rs new file mode 100644 index 000000000..ff33cf31a --- /dev/null +++ b/src/test/ui/abi/extern/extern-call-scrub.rs @@ -0,0 +1,45 @@ +// run-pass +#![allow(unused_must_use)] +// This time we're testing repeatedly going up and down both stacks to +// make sure the stack pointers are maintained properly in both +// directions + +// 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) + count(data - 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(12); + println!("result = {}", result); + assert_eq!(result, 2048); + }) + .join(); +} -- cgit v1.2.3