77 lines
2.2 KiB
Rust
77 lines
2.2 KiB
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-test newsched transition
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// 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::rand;
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use std::task;
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mod rustrt {
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use std::libc;
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extern {
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pub fn debug_get_stk_seg() -> *u8;
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pub fn rust_get_sched_id() -> libc::intptr_t;
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pub fn rust_get_argc() -> libc::c_int;
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pub fn get_task_id() -> libc::intptr_t;
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pub fn rust_get_task();
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}
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}
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fn calllink01() { unsafe { rustrt::rust_get_sched_id(); } }
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fn calllink02() { unsafe { rustrt::rust_get_argc(); } }
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fn calllink08() { unsafe { rustrt::get_task_id(); } }
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fn calllink10() { unsafe { rustrt::rust_get_task(); } }
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fn runtest(f: extern 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: extern fn(), frame_backoff: u32, last_stk: *u8) -> u32 {
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unsafe {
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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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}
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pub fn main() {
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use std::rand::Rng;
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let fns = ~[
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calllink01,
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calllink02,
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calllink08,
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calllink10
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];
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let mut rng = rand::rng();
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for f in fns.iter() {
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let f = *f;
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let sz = rng.gen::<u32>() % 256u32 + 256u32;
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let frame_backoff = rng.gen::<u32>() % 10u32 + 1u32;
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task::try(|| runtest(f, frame_backoff) );
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}
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}
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