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