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// This test attempts to force the dynamic linker to resolve
// external symbols as close to the red zone as possible.
extern mod rustrt {
#[legacy_exports];
fn debug_get_stk_seg() -> *u8;
fn rust_get_sched_id() -> libc::intptr_t;
fn last_os_error() -> ~str;
fn rust_getcwd() -> ~str;
fn get_task_id() -> libc::intptr_t;
fn rust_sched_threads();
fn rust_get_task();
}
fn calllink01() { rustrt::rust_get_sched_id(); }
fn calllink02() { rustrt::last_os_error(); }
fn calllink03() { rustrt::rust_getcwd(); }
fn calllink08() { rustrt::get_task_id(); }
fn calllink09() { rustrt::rust_sched_threads(); }
fn calllink10() { rustrt::rust_get_task(); }
fn runtest(f: fn~(), frame_backoff: u32) {
runtest2(f, frame_backoff, 0 as *u8);
}
fn runtest2(f: fn~(), frame_backoff: u32, last_stk: *u8) -> u32 {
let curr_stk = rustrt::debug_get_stk_seg();
if (last_stk != curr_stk && last_stk != 0 as *u8) {
// We switched stacks, go back and try to hit the dynamic linker
frame_backoff
} else {
let frame_backoff = runtest2(f, frame_backoff, curr_stk);
if frame_backoff > 1u32 {
frame_backoff - 1u32
} else if frame_backoff == 1u32 {
f();
0u32
} else {
0u32
}
}
}
fn main() {
let fns = ~[
calllink01,
calllink02,
calllink03,
calllink08,
calllink09,
calllink10
];
let rng = rand::Rng();
for fns.each |f| {
let f = *f;
let sz = rng.next() % 256u32 + 256u32;
let frame_backoff = rng.next() % 10u32 + 1u32;
task::try(|move f| runtest(f, frame_backoff) );
}
}
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