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// run-pass
// Previously memory for alternate signal stack have been unmapped during
// main thread exit while still being in use by signal handlers. This test
// triggers this situation by sending signal from atexit handler.
//
// ignore-wasm32-bare no libc
// ignore-windows
// ignore-sgx no libc
// ignore-vxworks no SIGWINCH in user space
// ignore-nto no SA_ONSTACK
#![feature(rustc_private)]
extern crate libc;
use libc::*;
unsafe extern "C" fn signal_handler(signum: c_int, _: *mut siginfo_t, _: *mut c_void) {
assert_eq!(signum, SIGWINCH);
}
extern "C" fn send_signal() {
unsafe {
raise(SIGWINCH);
}
}
fn main() {
unsafe {
// Install signal handler that runs on alternate signal stack.
let mut action: sigaction = std::mem::zeroed();
action.sa_flags = (SA_ONSTACK | SA_SIGINFO) as _;
action.sa_sigaction = signal_handler as sighandler_t;
sigaction(SIGWINCH, &action, std::ptr::null_mut());
// Send SIGWINCH on exit.
atexit(send_signal);
}
}
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