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// This test attempts to force the dynamic linker to resolve
// external symbols as close to the red zone as possible.
use std;
import task;
import std::rand;
native mod rustrt {
fn set_min_stack(size: uint);
fn debug_get_stk_seg() -> *u8;
fn unsupervise();
fn last_os_error() -> str;
fn rust_getcwd() -> str;
fn refcount(box: @int);
fn do_gc();
fn pin_task();
fn unpin_task();
fn get_task_id();
fn sched_threads();
fn rust_get_task();
}
fn calllink01() { rustrt::unsupervise(); }
fn calllink02() { rustrt::last_os_error(); }
fn calllink03() { rustrt::rust_getcwd(); }
fn calllink04() { rustrt::refcount(@0); }
fn calllink05() { rustrt::do_gc(); }
fn calllink06() { rustrt::pin_task(); }
fn calllink07() { rustrt::unpin_task(); }
fn calllink08() { rustrt::get_task_id(); }
fn calllink09() { rustrt::sched_threads(); }
fn calllink10() { rustrt::rust_get_task(); }
fn runtest(&&args:(fn(), u32)) {
let (f, frame_backoff) = args;
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,
calllink04,
calllink05,
calllink06,
calllink07,
calllink08,
calllink09,
calllink10
];
let rng = rand::mk_rng();
for f in fns {
let sz = rng.next() % 256u32 + 256u32;
let frame_backoff = rng.next() % 10u32 + 1u32;
rustrt::set_min_stack(sz as uint);
task::join(task::spawn_joinable((f, frame_backoff), runtest));
}
}
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